WO2014057582A1

WO2014057582A1 - Shaped oil-palm body, manufacturing method therefor, and laminated plywood

Info

Publication number: WO2014057582A1
Application number: PCT/JP2012/076507
Authority: WO
Inventors: 昌男福山; 隆行伊藤; 高志青野
Original assignee: マイウッド・ツー株式会社
Priority date: 2012-10-12
Filing date: 2012-10-12
Publication date: 2014-04-17
Also published as: MY166988A

Abstract

To make it possible to form laminated plywood into a desired shape, reduce the use of formaldehyde adhesives, which are a cause of sick building syndrome, and make use of components that are naturally present in oil palms. This shaped oil-palm body (EO) is obtained by drying an oil-palm material (W) of a prescribed length, layering together a plurality of sheets thereof, compressing the layered oil-palm material (W) by applying a compressing force perpendicularly to the surfaces thereof while heating the layered oil-palm material (W) and restricting expansion parallel to the surfaces thereof, and then maintaining said compression while lowering the temperature and fixing the oil-palm material in place. The sheets of oil-palm material (W) are stacked such that the fiber directions thereof cross, preventing the sheets from bending perpendicularly to the surfaces thereof.

Description

Oil palm molded body, manufacturing method thereof, laminated plywood

The present invention relates to a laminated plywood and an oil palm molded body using an adhesive or the like obtained from oil palm (oil palm), which is a kind of palm, and a method for producing the same. Oil formed by thinly peeling oil palm The present invention relates to a method for producing a laminated plywood using a palm material. This laminated plywood can be used for building floor materials and wall materials, building materials such as partition materials, furniture materials, ships including boats, other indoor and outdoor decks and playground equipment, exterior and interior of vehicle body bodies It is. Moreover, it is related with the oil palm molded object which forms the laminated plywood with oil palm, and its manufacturing method. In general, “board” is described as “thin timber thin and flat” or “thin metal or stone thin and flat” according to Kojien, but here, oil palm is made of wood. Although it does not have properties, it has properties close to bamboo, but in oil palm, “thinly flat” is called “thin plate”. Moreover, since there is no term which calls the material of an oil palm in detail, it shall treat like the wood.

In general, an oil palm tree consists of a single trunk and reaches a height of 10 to 20 m or more. The leaves are wing-shaped and about 3-5m long, about 30 young trees a year, and about 20 new trees grow over 10 years old. The flower is composed of 3 petals and 3 cocoons, each of which forms a small but dense group, and it takes about 6 months from fruiting until the fruit ripens. The fruit consists of fleshy flesh (medium pericarp) with a lot of oil and one seed that is also rich in oil, and the weight of the fruit is about 40-50 kg per bunch.

It has been cultivated in plantations in Southeast Asia since the latter half of the 19th century, and palm oil (palm oil), a vegetable oil extracted from oil palm, is more productive and cheaper than other vegetable oils such as soybeans and rapeseed. Therefore, it is used for foods such as margarine and oil for fried foods. It is also widely used in soaps and cosmetics. In recent years, palm oil (palm oil) is also being exported to Japan from Southeast Asia such as Malaysia and Indonesia. Therefore, oil palm sometimes refers to the meaning of fats and oils that can be taken from the pulp and seeds and the trunk of the oil palm itself.

In general, oil palm is a collective term for plants classified into the genus Palmae, and is famous for two types: Elaeis guineensis, native to West Africa, and Elaeis oleifera, native to Latin America. Among the cultivars, there is a hybrid of Guinea oil palm and American oil palm. In particular, oil palm (oil palm), which is a kind of palm used as a raw material for vegetable oils and fats, may be referred to as “oil palm”.
In other words, oil palm can remove fats and oils from pulp and seeds, and the amount of fats and oils obtained per unit area outperforms other plants. Because agriculture is carried out, it may be becoming more prominent to call the oil and fat “oil palm”.
However, in the present invention, it does not mean the oil palm of fats and oils that can be taken from the pulp and seeds, but the trunk of the oil palm itself or the whole plant is called oil palm.

Patent applications dealing with this oil palm include those listed in Patent Document 1 (invention dealing with empty fruit bunch). In patent document 1, the manufacturing method of the building material using oil palm is disclosed. Specifically, after the palm fiber is washed, it is dried so that the dry oil becomes 95%, and the dried palm fiber is blown and cut in units of 1 to 1.5 cm to produce a palm fiber chip. Pulverizing the dried palm fiber with a particle size of 200 mesh, pulverizing bamboo with a particle size of 200 mesh, the palm fiber chip, the palm fiber powder, the bamboo powder, and the bioceramic powder Are prepared in a ratio of 1: 1: 1: 1 to produce a main raw material, a step of extracting fly ash having a particle size of 200 mesh from coal carbide, a flame inhibitor and a heat resistant resin. A step of producing a binder by mixing and melting a flame retardant resin for curing at a ratio of 1: 1, 20-30% by weight of the produced binder, 50-60% by weight of the mixed main raw material, fly ash 2 Mixing a powder of ˜25% by weight and kneading in a high liquid state, passing the kneading through a molding part that radiates a temperature of 150 to 200 ° C. and baking it first, and baking the molded product Rolling between a plurality of upper roller groups and lower roller groups that are arranged so that the distance between the upper roller group and the lower roller group gradually becomes narrower and gradually rolling to a smaller thickness; and A step of freezing at 0 to 4 ° C. while passing through a cooling unit composed of a number of upper roller groups and a lower roller group, and a step of cutting the molded product in a unit of a certain length by a blade that is raised and lowered by a cutting cylinder. It consists of processes.

In this patent document 1, palm fiber is not only harmless to the human body by using it as a main raw material, but palm fiber cut at 1 to 1.5 cm is used together with palm fiber powder. It becomes a solid building material by acting as a temporary bridge with other contents, and antibacterial and deodorizing functions can be realized by bamboo and bioceramics. Further, generation of far infrared rays and anions can be expected without generating mold. And nonflammable waste material can be recycled and manufacturing cost becomes cheap. Furthermore, since no toxic gas is generated from all the compositions, it is said to be highly safe as a building material.

Further, in Patent Document 2 (invention dealing with empty fruit bunches), the plate-like body or molded body is made by attaching a resin having rubber-like elasticity to the oil palm fibers obtained by defibrating the empty fruit bunches of oil palm. A plate-like body or a molded body obtained by compression molding.
Therefore, the oil palm fiber obtained by defibrating the empty fruit bunch of oil palm has a fiber repellent property because, for example, palm oil adheres to the fiber surface compared to other palm fibers such as coconut palm fiber. In addition to being excellent in water, the amount of cellulose and lignin contained in the fiber is relatively large, so that water resistance is excellent. In addition, the oil palm fiber has a high fiber strength, a large fiber diameter, and a long fiber length as compared with other palm fibers such as a coconut fiber, and therefore has excellent dimensional stability. In addition, since the oil palm fiber has large irregularities on the surface and high bending strength, and the entanglement between the fibers is large, the dimensional stability is also enhanced by this. Therefore, this plate-shaped body or molded body is excellent in dimensional stability during water absorption and moisture absorption.
And since the irregularities on the surface of the oil palm fiber are large, the resin exhibiting rubber-like elasticity penetrates into the voids on the surface of the oil palm fiber and solidifies or hardens, which acts like a nail or wedge, so-called anchor effect. Therefore, the oil palm fiber is strongly bonded to the resin having rubber-like elasticity. This is also considered to contribute to the improvement of dimensional stability at the time of water absorption and moisture absorption.

The oil palm fiber is superior in elasticity recovery properties, for example, because the fiber has a large rigidity and strength, a large fiber diameter, and a long fiber length, compared to other palm fibers such as coconut fiber. Yes. Further, the oil palm fiber has high fiber bending strength and large entanglement between the fibers, so that the elastic recovery is improved. And the resin which shows rubber-like elasticity has high elastic recovery property. Therefore, a plate-like body or molded body in which oil palm fibers are connected by a resin exhibiting rubber-like elasticity exhibits excellent elastic recovery, good walking feeling and cushioning properties, and good sound insulation.
Since this plate-like body or molded body uses oil palm fiber, less labor is required for defibration, etc., compared to other types of palm fiber, so that manufacturing costs and energy can be reduced, and the product is inexpensive. Become. For example, coconut fiber is immersed in water for a long period of time to soften the coconut shell, and then requires a great deal of energy for a long period of time to be mechanically fibrillated. On the other hand, oil palm defibrates empty fruit bunches that are originally in the form of fibers, so that there is no need for immersion in water, and very little energy is required for defibration. In addition, oil palm fibers have less dusting properties than coconut fibers, and the working environment can be prevented from deteriorating in handling.
Furthermore, since a large gap is formed between the fibers of the oil palm fiber, when a resin exhibiting rubber-like elasticity is supplied by spraying or dipping, the resin adheres evenly to all the fibers through the gap, and the strength distribution is A plate state of being uniform is obtained.

And in patent document 3 (invention of an oil palm trunk), the technique of the plywood which made the adhesive penetrate | infiltrate the fiber exposed on the surface of the several single board bonded together with the adhesive agent is disclosed.
The palm plywood according to Patent Document 3 includes a plurality of veneers bonded with a resin adhesive, and at least one of the plurality of veneers is a palm veneer, and a palm veneer. A resin adhesive is made to permeate palm fibers exposed on the surface. By using a palm veneer that can be manufactured from a palm trunk of inexpensive waste material, the surface is treated with a resin adhesive without using a veneer veneer with relatively good quality as a face and a back. Therefore, plywood is manufactured at low cost.
Moreover, the palm plywood of patent document 3 uses all the single veneers as palm veneers, uses only palm veneers that can be manufactured from palm trunks of inexpensive waste materials, and bonds them together with a resin adhesive. Also good. The resin adhesive permeated into the palm fiber at this time is the same type as the resin adhesive that bonds a plurality of single plates. Since the resin adhesive is the same system, the plywood can be manufactured at low cost. Here, the term “same system” includes the same resin adhesive and a composition whose composition (for example, composition ratio) is changed.

And the palm plywood of patent document 3 makes the palm fiber penetrate | infiltrate a resin adhesive after grind | polishing the surface which makes a palm fiber osmose | permeate a resin adhesive, reduces the palm fiber which protrudes from the plywood surface, and resin to palm fiber The adhesive is permeated. This plywood manufacturing method includes a step of bonding a plurality of veneers with an adhesive, a step of polishing a surface of the plurality of veneers that allows the adhesive to penetrate into exposed fibers, and a polished surface. Applying adhesive to infiltrate the adhesive into the fiber and drying the adhesive, which makes it possible to use a relatively good quality wood veneer as a face and back without using it Plywood can be manufactured at cost.
Thus, according to Patent Document 3, a plywood, a palm plywood, and a plywood manufacturing method that can be manufactured at a low cost without using a single veneer of a tree having relatively good quality as a face and a back are disclosed. Yes.

JP 2009-166342 A JP-A-10-8696 JP2011-68015 A

As described above, Patent Document 1 and Patent Document 2 both use oil palm fibers obtained by defibrating empty fruit bunches of oil palm fruits, and do not directly use oil palm trunks. Absent. However, the trunk of oil palm is 20 m or more in mature wood, and its use is desired because it has a volume ratio of 90 to 95% of the whole.
Especially in Southeast Asia such as Malaysia, oil palm is cultivated for the production of palm oil, but the empty fruit bunch after palm oil collection contains a lot of fiber etc. Is used in various applications such as fiber boards. However, palm trunks that are harvested every year are not used effectively and are currently being disposed of.
Patent Document 3 discloses a process in which at least one outermost single plate is bonded to a palm single plate with a plurality of resin adhesives, and the surface of the palm single plate is a resin adhesive on the exposed palm fibers. Disclosed is a method for manufacturing a plywood, comprising: a step of polishing a surface that impregnates a surface; a step of applying a resin adhesive to the polished surface to infiltrate the resin adhesive into palm fibers; and a step of drying the resin adhesive. ing. However, it is unclear how to apply the resin adhesive to the oil palm veneer or to penetrate the exposed palm fiber, and a specific method for manufacturing plywood Is unknown. At least, it is premised on the use of a resin adhesive in which a single plate of oil palm is bonded with a plurality of resin adhesives.

What is commonly called plywood, lauan plywood called veneer wood, Chinese plywood with cinna wood finished on the surface of the lauan plywood, conifer plywood made of pine, cedar, etc. There is. Lauan plywood has been used for a long time, but formaldehyde-based adhesives are used for the bonding, and the vaporized component is a cause of sick house syndrome that adversely affects the human body. Therefore, not only the shortage of raw materials, but also the formaldehyde adhesive is disliked. The same is true for China plywood because it uses Lauan plywood. In addition, softwood plywood has a problem in that a large number of cracks are formed in the thin plate, and the use of an adhesive must be increased.
Therefore, the presence of a multilayer plywood that suppresses the use of formaldehyde-based adhesives that cause sick house syndrome is desired. In addition, when an adhesive different from a formaldehyde adhesive that causes sick house syndrome is used, the cost increases. Moreover, even if there exists the technique used as the plate-shaped plywood in the conventional laminated plywood, the technique of shape | molding the laminated plywood itself does not exist.

Therefore, the present invention has been made to solve such a problem, the laminated plywood itself can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed. The first object is to provide an oil palm molded body using components inherently possessed and a method for producing the oil palm molded body.
In addition, it increases the mechanical strength of the laminated plywood itself, suppresses the use of formaldehyde-based adhesives that cause sick house syndrome, and uses the components that oil palm itself originally has, making it inexpensive. Is the second issue.

An oil palm molded body according to the invention of claim 1 is obtained by drying, laminating and heating an oil palm material made of a thin plate of a predetermined length, and parallel to the surface of the laminated oil palm material. Compressed by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material, while maintaining the compression, cooling to lower the temperature, and fixing In the molded oil palm body, the laminated oil palm materials are overlapped with their fiber directions crossed to prevent the plurality of oil palm materials from being bent in a direction perpendicular to the surface. Is.
Here, since the fiber directions of the laminated oil palm materials are crossed and overlapped, the plurality of oil palm materials can be prevented from being bent in a direction perpendicular to the surface, and the laminated The oil palm material can be prevented from bending.
In particular, the mechanical strength of the oil palm molding can be determined by the shape of the surface to be compressed or the compression depth, and a desired oil palm molding can be obtained.

In general, as the trunk of oil palm, its varieties and production areas are not particularly limited. Usually, the trunk of which fruit productivity has dropped, the trunk of more than 20 years, replanting cultivation or planned cultivation Therefore, a trunk that is scheduled to be discarded is used, but a trunk that is young may be used.
Moreover, the drying method of the thin plate obtained as the oil palm material is not particularly limited, and may be naturally dried or artificially dried, but artificial drying is more expensive. is there.
Here, wood such as Lauan, which is generally used for building materials, forms a secondary xylem composed of cell (dead cell) tissue in which the movement of water and nutrients has stopped, whereas oil palm The trunk of this is composed only of primary tissues of vascular bundles and parenchymal cells, and most of the cells centering on parenchymal cells are living cells in which water and nutrients are actively transferred, so the water content is extremely high. In addition, the oil palm trunk is rich in saccharides (eg, fructose, glucose, fructooligosaccharides, inositol, etc.). For this reason, when the thickness of the oil palm material from the oil palm trunk is thick, bacteria such as mold are proliferated and corroded easily by natural drying, and productivity and commercial value are impaired. On the other hand, when artificially drying, the cost becomes high. Therefore, according to the experimental study by the present inventors, by reducing the thickness of the oil palm material obtained from the oil palm trunk within the range of 3 to 35 mm, the product value and productivity are reduced by bacteria such as mold even in natural drying. It has been confirmed that the cost can be reduced without incurring cost.
Consolidation refers to compressing a base material such as the oil palm base material by applying a predetermined compressive force under a predetermined temperature condition, and lowering the temperature to a predetermined temperature after a predetermined time has elapsed. This is a process of compressing the base material at a predetermined compression rate by immobilization.
The oil palm material has a thickness before the consolidation process in the range of 3 to 35 mm, and the thickness after the consolidation process is in the range of 1 to 12 mm.

Furthermore, laminating a plurality of sheets in the direction perpendicular to the fiber (vascular bundle) direction of the oil palm material means that layers are laminated in a direction perpendicular to the fiber length direction, that is, a surface other than the end face and the end face of the tree. This means that the fiber directions may be the same and may be laminated, the fiber directions may be perpendicular to each other, and the number of the fibers may be an odd number or an even number. Further, the number of stacked layers may be two or more.
In addition, heating and compressing the entire thickness of the dried oil palm material by applying an external force in a direction perpendicular to the fiber direction in the heated state means compressing in the loading direction of the oil palm material and at least the end face This means that the area corresponding to is reduced, that is, the so-called compression direction is specified and consolidation processing is performed. This consolidation process can be formed by, for example, setting the moisture content of the oil palm material to be substantially uniform, heating and compressing under a predetermined condition, and fixing, and this is a predetermined condition at this time. The temperature, pressure, time, compression speed, and the like are determined in advance by experiments or the like using the target compression ratio and the like as parameters.

And the said oil palm material is joined by the said compaction process, and the whole air-dry specific gravity is 0.8 or more by the result obtained by experiment of inventors, etc., by a compaction process, without using an adhesive agent. This means that the air-drying specific gravity of the whole laminated wood in a state where the thin plates laminated on each other are joined to each other is 0.8 or more.
Here, the air-dry specific gravity is the specific gravity when the wood is dried in the air, and is usually expressed by the specific gravity when the moisture content is 15%, and water having the same volume as the weight when the wood is dried. It is the value which compared the weight of. The larger the value, the heavier, the smaller the lighter.
In addition, the air-drying specific gravity of the entire compacted by compaction processing is 0.8 or more, as a result of repeated experiments by the inventors, the oil palm material is highly compressed and the air-drying specific gravity is 0.8 or more As a result, the properties of the oil palm are changed and the hardness is remarkably increased, and the physical stability is increased with less variation in physical properties and characteristic values such as strength / hardness and dimensional change rate. It was set based on knowledge. In other words, it is a characteristic area where the strength and hardness are increased by compression and the variation in physical properties is reduced, indicating that it is a characteristic of compacted wood. In which the air-drying specific gravity does not exceed 0.8 is not included. More preferably, when the air-dry specific gravity is 0.9 or more, the hardness is remarkably increased, and the physical stability is further increased due to less variation in physical properties and characteristic values such as hardness and dimensional change rate. become.

The air-drying specific gravity is ultimately set in consideration of cost, required strength and hardness, etc., but if the compression ratio is too high to increase the air-drying specific gravity, the wood is composed. Since the fiber to be broken is broken and a commercial property is lost, the value of the air-dry specific gravity measured immediately before the crack is generated by high compression becomes the maximum value. That is, the upper limit of the air-dry specific gravity in the present invention is the compression limit of the compacting process, and the maximum value is a finite value. In addition, the numerical value of the air-dry specific gravity is not required to be strict, but is approximate. Naturally, it is an approximate value including an error by measurement or the like, and does not deny an error of several percent.

The oil palm molded body according to the invention of claim 2 is obtained by drying, laminating and heating a predetermined length of oil palm material, and extending in a parallel direction along the surface of the laminated oil palm material. The oil palm is formed by compressing by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material while regulating the temperature, and then maintaining the compression, cooling it at a reduced temperature, and fixing it. In the molded body, a plurality of the laminated oil palm materials are overlapped so that the plurality of oil palm materials can be bent only in a direction perpendicular to a specific direction with respect to the surface.
Here, a plurality of the laminated oil palm materials are overlapped, and the plurality of oil palm materials can be curved only in a direction perpendicular to a specific direction with respect to the surface, Some of the oil palm materials may be ones in which the lengths of the fibers intersect, and as long as a desired curve can be obtained as a result.
In particular, the mechanical strength of the oil palm molding can be determined by the shape of the surface to be compressed or the compression depth, even if the oil palm molding has a structure that is curved only in a direction perpendicular to a specific direction with respect to the surface. A desired oil palm molding is obtained.

The oil palm material obtained by laminating a plurality of oil palm molded bodies according to the invention of claim 3 is formed by forming one or more of a plane portion, a concave portion, and a convex portion by a mold.
Here, the formation of one or more of the flat portion, the concave portion, and the convex portion by the mold refers to the presence or absence of molding, and may be any as long as it is molded.

According to a fourth aspect of the present invention, there is provided a method for producing an oil palm molded body, wherein a predetermined length of an oil palm trunk is rotated in the circumferential direction thereof and peeled to a predetermined thickness by a rotary race to form a plurality of oil palm materials, The formed oil palm material is dried, a plurality of the dried oil palm materials are laminated in a predetermined state, heated to increase the temperature of the laminated oil palm materials, and the heated the laminated While restricting the oil palm material to extend in a direction parallel to the surface of the oil palm material, a compressive force in a direction perpendicular to the surface of the oil palm material is applied between the upper mold and the lower mold of the mold. The laminated oil palm material compressed and molded for a predetermined time is cooled and fixed by lowering the temperature supplied in the heating step.
Here, the thin plate process is a process of forming a plurality of oil palm members by peeling a predetermined length of oil palm trunk to a predetermined thickness with a rotary race while rotating in the circumferential direction.
Moreover, the said drying process is a process of drying an oil palm material.
And the said lamination process is a process of laminating | stacking two or more oil palm materials dried at the said drying process in a predetermined state.
Furthermore, the said heating process is a process heated so that the temperature of the oil palm material laminated | stacked at the said lamination process may be raised.
Furthermore, the compression step refers to the upper mold of the mold while restricting the laminated oil palm material heated by the heating step from extending in a direction parallel to the surface of the oil palm material. It is a step of compressing and forming for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material with the lower mold.
In addition, the immobilization step is a step of cooling and fixing the laminated oil palm material compressed in the compression step for a predetermined time by lowering the temperature supplied in the heating step.

In the above laminating process, when the fiber directions are laminated in the same direction, joining is performed along the length direction of the original trunk, and the fibers softened in the consolidation process are adjacent to each other in the laminating direction with the same fiber direction. It is easy to get entangled with the fiber and is fixed in the entangled state. That is, the fibers are entangled with each other by the consolidation process, and the bonding strength is increased. Therefore, the mechanical strength is high, and a stable dimensional shape after consolidation is ensured. Furthermore, by laminating the fibers in the same fiber direction, the expansion rate and contraction rate at the joint surface can be made completely the same, and the dimensional shape stability is higher without applying stress. .

In addition, in the laminating process in which the fiber directions are orthogonal to each other, even if expansion and contraction force is generated due to changes in ambient environmental conditions after consolidation, the fibers interact with each other to prevent warping deformation in a specific direction. Thus, a good balance state is obtained, the dimensional shape stability is improved, a tough laminated laminated plywood is obtained, and an oil palm molded body is obtained.
In the above drying step, the moisture content of the oil palm material is dried within the range of 5 to 30%, so that cracks, deformation, swelling, rupture and the like are prevented. Therefore, more stable dimensional shape is ensured and the yield is high. Further, when the moisture content is in a dry state within the range of 5% to 30%, it is also suitable for joining with Lauan thin plate, China thin plate, conifer thin plate and the like.

Since the heating temperature in the heating step is in the range of 110 to 170 ° C., there is a problem of material deterioration such as immobilization failure in the consolidation process, poor joining between woods, surface carbonization, and low material strength. Can be prevented. Further, when the heating temperature is in the range of 110 ° C. to 170 ° C., it is suitable not only for joining with the oil palm material W but also for bonding with Lauan thin plate, China thin plate, conifer thin plate and the like.
Since the predetermined compression pressure in the compression step is within the range of 1 to 100 kg / cm ² , it is possible to prevent immobilization defects, poor bonding between woods, and occurrence of surface cracks in consolidation. .
Since the time required for the heating step and the compression step is within a range of 10 to 120 minutes, it is possible to prevent immobilization failure, poor joining between woods, and surface carbonization in the compacting process.
By the way, even if it is a lamination method which curves only in the direction perpendicular to a specific direction with respect to the surface of the oil palm molded body, that is, a lamination method in which the fiber directions do not intersect and are parallel, the shape or compression depth of the surface to be compressed Thus, the mechanical strength of the oil palm molded body can be determined, and a desired oil palm molded body can be obtained.

The method for producing an oil palm molded body according to the invention of claim 5 is to form a plurality of oil palm materials by peeling the oil palm trunk of a predetermined length to a predetermined thickness with a rotary race while rotating the oil palm trunk in the circumferential direction, The formed oil palm material is dried, a plurality of the dried oil palm materials are laminated in a predetermined state, heated to increase the temperature of the laminated oil palm materials, and the heated the laminated Applying a compressive force in a direction perpendicular to the surface of the oil palm material between the upper mold and the lower mold of the mold while restricting the oil palm material to extend in the parallel direction along the surface of the oil palm material. The laminated oil palm material compressed and molded for a predetermined time is fixed by lowering the temperature supplied in the preliminary heating step and fixed. The surface of the laminated oil palm material in the upper mold and the lower mold while restricting the il palm material to extend in a parallel direction along the surface of the laminated oil palm material under predetermined humidity and temperature conditions And compressing and molding for a predetermined time by applying a compressive force in a direction perpendicular to the temperature, the temperature of the laminated oil palm material compression-molded for the predetermined time is lowered and fixed.
Here, the preliminary heating process, the preliminary compression process, and the preliminary fixing process are not different in basic operation from the heating process, the compression process, and the fixing process of claim 5. The processing temperature and / or compression force is different, or the oil palm molding processing content is different. Moreover, this fixing process consists of the heating process, compression process, and fixing process of the said Claim 5.
The thin plate step is a step of forming a plurality of oil palm materials by peeling a predetermined length of oil palm trunk to a predetermined thickness with a rotary race while rotating in the circumferential direction. Moreover, the said drying process is a process of drying the oil palm material formed at the said thin-plate process. And the said lamination | stacking process is a process of laminating | stacking the oil palm material dried at the said drying process in a predetermined state.

Furthermore, the said preheating process is a process heated so that the temperature of the oil palm material laminated | stacked by the said lamination process may be raised.
Furthermore, the pre-compression process may be performed by restricting the laminated oil palm material heated by the pre-heating process from extending in a parallel direction along the surface of the oil palm material, It is a step of compressing and molding for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the oil palm material with the lower mold.
In addition, the preliminary fixing step is a step of fixing the laminated oil palm material compression-molded for a predetermined time in the compression step by lowering the temperature supplied in the preliminary heating step.
Further, in the main fixing step, the preliminary oil palm molded body fixed in the preliminary fixing step extends in a parallel direction along a surface of the laminated oil palm material under a predetermined humidity and temperature condition. The laminated oil palm is subjected to compression molding for a predetermined time by applying a compression force in a direction perpendicular to the surface of the laminated oil palm material between the upper mold and the lower mold, and the compression molding for the predetermined time. This is a step of lowering the temperature of the material and fixing it.

In general, the water content of the oil palm material obtained by the drying step is dried within a range of 5 to 30%. Here, as a result of repeated experiments by the inventors, generally, when the water content is less than 5%, sufficient chemical change cannot be caused by compaction processing, and the surface is too dry. A phenomenon in which the compressed portion returns to the original thickness when it gets wet with water after the consolidation process, that is, a so-called immobilization defect, is likely to occur. On the other hand, when the moisture content exceeds 30%, it is difficult to dry uniformly to the inside, and an internal pressure that resists the pressing pressure is generated by the action of high-temperature and high-pressure steam contained in the wood in the consolidation process of compaction processing, After removing the pressure, it was found that damage such as cracking / breaking (puncture), deformation / bulging, and the like were likely to occur, and the present invention was completed based on this finding. More preferably, the water content of the oil palm material, lauan thin plate, china thin plate, and softwood thin plate is in the range of 10 to 20%.

Further, the heating temperature in the preheating step is set within a range of 110 to 170 ° C. Here, as a result of repeated experiments, the inventors of the present invention have found that if the heating temperature is too low, sufficient compacting cannot be performed, resulting in immobilization failure or poor bonding between layers, while on the other hand, if the heating temperature is too high. Since the surface is carbonized and changes to black, the color tone and the inherent fragrance inherent to the plant may be impaired, or the material may deteriorate, resulting in a decrease in strength and embrittlement. Therefore, the heating temperature is preferably 110 to 170. It is necessary to perform consolidation within the range of ° C.

The predetermined compression pressure in the preliminary compression step is set in the range of 1 to 100 kg / cm ² . Here, as a result of repeated experiments, the inventors have found that if the applied pressure is too low, sufficient compacting is not performed, and immobilization failure or poor connection between woods occurs. On the other hand, if the pressure is too high, the surface may crack. Therefore, the present inventors have found that a pressurizing condition in the range of 1 to 100 kg / cm ² is appropriate and completed the present invention based on this finding. More preferably, it is within the range of 10 to 50 kg / cm ² .

Further, the time required for the preliminary heating step and the preliminary compression step is in the range of 10 to 120 minutes. Here, the present inventors are able to prevent immobilization and poor bonding between woods by being sufficiently heat-compressed, and on the processing time of heat-compression that can prevent carbonization of the surface due to the treatment time being too long. As a result of repeated experiments, it was found that although the time varies depending on the material of the thin plate, a time condition within a range of 10 to 120 minutes for applying an appropriate temperature is appropriate, and the present invention is based on this finding. Is completed. The predetermined time is preferably in the range of 20 to 30 minutes.
In addition, depending on the form or use object of the oil palm molded body, the preheating step, the precompression step, the prefixing step, or the main fixing step may include the preheating step, the precompression step, and the prefixing step. The preliminary process can be repeated one or more times, or the main immobilization process can be repeated one or more times as the main process.

The laminated plywood according to the invention of claim 6 comprises an oil palm material made of one or more pieces formed by peeling a predetermined length of an oil palm trunk from the outer periphery to a predetermined thickness with a rotary race while rotating the oil palm trunk in the circumferential direction, and a predetermined length. One or more of lauan thin plate, Chinese thin plate, coniferous thin plate formed by peeling off the lauan or sina or coniferous trunk from the outer periphery with a rotary race while rotating in the circumferential direction is used as the oil palm material. They are placed facing each other and joined together. Further, a net is provided between the oil palm materials, and the net is joined between the oil palm materials.
Here, the one or more oil palm materials are thin plates formed by peeling a predetermined length of an oil palm trunk to a predetermined thickness with a rotary race while rotating in the circumferential direction. Moreover, since the quantity of the resin component and sugar component which the oil palm in the case of joining is ensured even if it does not use another adhesive agent, it is specified. Of course, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface generated during the formation, mechanical joining using the molding capability is also included.
In addition, the compaction processing compresses the base material such as the oil palm material by applying a predetermined compressive force under a predetermined temperature condition, and maintaining the compressed compressibility after a predetermined time, This is a process of consolidating the base material to a predetermined compression rate by fixing the pressure by lowering the temperature to a predetermined temperature.
The oil palm material has a thickness before the consolidation process in the range of 3 to 35 mm, and the thickness after the consolidation process is in the range of 1 to 12 mm.

By the way, as the trunk of the oil palm, its varieties, production areas, etc. are not particularly limited. Usually, the trunk of which fruit productivity has dropped, the trunk of more than 20 years, replanting cultivation or planned cultivation Therefore, a trunk that is scheduled to be discarded is used, but a trunk that is young may be used.
Moreover, the drying method of the thin plate obtained as the oil palm material is not particularly limited, and may be naturally dried or artificially dried, but artificial drying is more expensive. is there.
Here, wood such as Lauan, which is generally used for building materials, forms a secondary xylem composed of cell (dead cell) tissue in which the movement of water and nutrients has stopped, whereas oil palm The trunk of this is composed only of primary tissues of vascular bundles and parenchymal cells, and most of the cells centering on parenchymal cells are living cells in which water and nutrients are actively transferred, so the water content is extremely high. In addition, the oil palm trunk is rich in saccharides (eg, fructose, glucose, fructooligosaccharides, inositol, etc.). For this reason, when the thickness of the oil palm material from the oil palm trunk is thick, bacteria such as mold are proliferated and corroded easily by natural drying, and productivity and commercial value are impaired. On the other hand, when artificially drying, the cost becomes high. Therefore, according to the experimental study by the present inventors, by reducing the thickness of the oil palm material obtained from the oil palm trunk within the range of 15 mm to 35 mm, the product value and productivity are reduced by bacteria such as mold even in natural drying. It has been confirmed that the cost can be reduced without incurring cost.

Furthermore, laminating a plurality of sheets in a direction perpendicular to the fiber direction of the oil palm material means that the layers are laminated in a direction perpendicular to the fiber length direction, that is, a surface other than the end face and the end face of the fiber. The layers may be laminated with the same direction, the fiber directions may be perpendicular to each other, and the number of the sheets may be an odd number or an even number. Further, the number of stacked layers may be two or more.
In addition, heating and compressing the entire thickness of the dried oil palm material by applying an external force in a direction perpendicular to the fiber direction in the heated state means compressing in the loading direction of the oil palm material and at least the end face This means that the area corresponding to is reduced, that is, the so-called compression direction is specified and compacted. This consolidation process can be formed by, for example, setting the moisture content of the oil palm material to be substantially uniform, heating and compressing under a predetermined condition, and fixing, and this is a predetermined condition at this time. The temperature, pressure, time, compression speed, and the like are determined in advance by experiments or the like using the target compression ratio and the like as parameters.

And the said oil palm material is joined by the said compaction process, and the whole air-dry specific gravity is 0.8 or more, and the thin board laminated | stacked on the several sheets was joined mutually by the compaction process, without using an adhesive agent. It means that the air-drying specific gravity of the whole laminated wood in the state is 0.8 or more.
Here, the air-dry specific gravity is the specific gravity when the wood is dried in the air, and is usually expressed by the specific gravity when the moisture content is 15%, and water having the same volume as the weight when the wood is dried. It is the value which compared the weight of. The larger the value, the heavier, the smaller the lighter.
In addition, the air-drying specific gravity of the entire compacted by compaction processing is 0.8 or more, as a result of repeated experiments by the inventors, the oil palm material is highly compressed and the air-drying specific gravity is 0.8 or more As a result, the properties of oil palm are changed and the hardness is remarkably increased. It was set based on knowledge. In other words, it is a characteristic area where the strength and hardness are increased by compression and the variation in physical properties is reduced, indicating that it is a characteristic of compacted wood. In which the air-drying specific gravity does not exceed 0.8 is not included. More preferably, when the air-dry specific gravity is 0.9 or more, the hardness is remarkably increased, and the physical stability is further increased due to less variation in physical properties and characteristic values such as hardness and dimensional change rate. become.
The air-drying specific gravity is ultimately set in consideration of cost, required strength and hardness, etc., but if the compression ratio is too high to increase the air-drying specific gravity, the wood is composed. Since the fiber to be broken is broken and a commercial property is lost, the value of the air-dry specific gravity measured immediately before the crack is generated by high compression becomes the maximum value. That is, the upper limit of the air-dry specific gravity in the present invention is the compression limit of the compacting process, and the maximum value is a finite value. In addition, the numerical value of the air-dry specific gravity is not required to be strict, but is approximate. Naturally, it is an approximate value including an error by measurement or the like, and does not deny an error of several percent.

It is sufficient that a net is disposed between the oil palm materials and the net is joined between the oil palm materials. In particular, the nets are joined and integrated between the oil palm materials, and the amount of the resin component and sugar component contained in the oil palm materials at the time of joining from the oil palm materials is different from that of the other. It is ensured without using any agent.

The laminated plywood according to the invention of claim 7 is made of an oil palm material formed by rotating an oil palm trunk of a predetermined length in the circumferential direction and peeling it to a predetermined thickness with a rotary race, and a lauan, a china or a conifer of a predetermined length. Arrange one or more of Lauan thin plate, China thin plate, coniferous thin plate formed by peeling the trunk from the outer periphery to a predetermined thickness while rotating the trunk in the circumferential direction, facing the oil palm material, Are integrally joined. Also in this case, a net is provided between the oil palm materials, and the net is joined between the oil palm materials.
Here, any one of Lauan thin plate, China thin plate, softwood thin plate formed by peeling to a predetermined thickness facing the oil palm material is a predetermined temperature condition using a resin component and a sugar component contained in the oil palm material Below, it may be compressed and fixed and joined together, or it is pasted using any one of Lauan thin plate, China thin plate, conifer thin plate formed by peeling to a predetermined thickness facing the oil palm material and other adhesive They may be combined.

It is sufficient that a net is disposed between the oil palm materials and the net is joined between the oil palm materials. In particular, the nets are joined and integrated between the oil palm materials, and the amount of the resin component and sugar component contained in the oil palm itself at the time of joining from the oil palm materials is different from that of the other It is ensured without using any agent.

In the laminated plywood according to the invention of claim 8, a plurality of oil palm materials formed by peeling off a predetermined length of oil palm trunk from the outer periphery to a predetermined thickness while rotating the trunk of the oil palm in the circumferential direction, and a predetermined length Lauan or Sina or coniferous trunks are arranged in the form of a plate in the length direction of the lauan lamella, or one or more of sina lamella or coniferous lamella, facing the oil palm material, and Are integrally joined. Further, a net is provided between the oil palm materials, and the net is joined between the oil palm materials.
Here, the one or more oil palm materials are thin plates formed by peeling a predetermined length of an oil palm trunk to a predetermined thickness with a rotary race while rotating in the circumferential direction. Moreover, since the quantity of the resin component and sugar component which the oil palm material in the case of joining is ensured even if it does not use another adhesive agent, it is specified. Of course, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface generated during the formation, mechanical joining using the molding capability is also included.

In addition, one or more of Lauan, China, or conifers having a predetermined length of Lauan or Sina or coniferous trunk formed in a plate shape in the length direction of the trunk are arranged facing the oil palm material, and The term “integrally joining” refers to joining any one of Lauan, China, and coniferous plates regardless of compression or compression.
What is necessary is just to arrange | position a net | network between the said oil palm materials, and to join a net | network between the said oil palm materials. In particular, the nets are joined and integrated between the oil palm materials, and the amount of the resin component and sugar component contained in the oil palm materials at the time of joining from the oil palm materials is different from that of the other. It is ensured without using any agent.

In the laminated plywood according to the invention of claim 9, a resin component and a sugar component contained in the oil palm material are bonded to one or more oil palm materials which are arranged facing the oil palm material and integrally bonded. In addition to the resin component and the sugar component contained in the oil palm material, other adhesives were used for the joint surface to be integrally joined with one or more of the Lauan thin plate, the Chinese thin plate or the softwood thin plate. Is.
Here, at least one of the lauan thin plate, the china thin plate, and the softwood thin plate to be joined to the one or more oil palm materials is contained in at least the joining surface of the oil palm material. A resin component and a sugar component are used. However, in the case of joining with one or more of Lauan thin plate, China thin plate, and softwood thin plate, the amount of resin component and sugar component contained in the oil palm material is limited. When trying to increase the strength, it is necessary to use another adhesive. Moreover, since oil palm material has the capability to shape | mold on the uneven surface opposite to the uneven surface produced in the case of the formation, the mechanical joining using the shaping | molding capability is also included.

The number of the oil palm members of the laminated plywood according to the invention of claim 10 is larger than the number of thin plates other than the oil palm.
Here, the number of the oil palm material is larger than the number of the thin plates other than the oil palm means that the amount of the resin component and the sugar component contained in the oil palm material is 1/2 or less than the conventional amount. It is what.

The net | network arrange | positioned between the said oil palm materials of the laminated plywood concerning invention of Claim 11, and joining between the said oil palm materials is made into the metal-mesh.
Here, the metal mesh can be any metal that can form a mesh made of stainless steel, brass, iron, or the like.

The net | network arrange | positioned between the said oil palm materials of the laminated plywood concerning invention of Claim 12, and joined between the said oil palm materials is made into the net | network of a chemical fiber or a vegetable fiber.
Here, the chemical fiber or vegetable fiber net may be any net that can be integrated in a state where the net is not clearly defined. In the case of chemical fiber, it is necessary to use one having a melting temperature higher than the joining temperature between the oil palm materials.

The oil palm molded body according to claim 1 dries a predetermined length of oil palm material, stacks a plurality of the oil palm materials, and regulates heating and extending in a parallel direction along the surface of the laminated oil palm material. In the oil palm molded body formed by compressing by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material, and then maintaining the compression and fixing by reducing the temperature, the laminated The oil palm materials are stacked with their fiber directions crossing each other to prevent the plurality of oil palm materials from being bent in a direction perpendicular to the surface.
In this way, since the oil palm material is laminated with the fiber directions intersecting each other, the oil palm material is compressed by applying a compression force in a direction perpendicular to the surface of the laminated oil palm material. It can be molded according to the shape of the mold to be compressed. In particular, the mechanical strength can be determined by the shape or compression depth of the compressed surface of the oil palm molded body, and a desired oil palm molded body can be obtained.
Therefore, the laminated plywood itself made of oil palm material can be molded into the desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and components inherent to oil palm are used. An oil palm molding that is environmentally friendly can be obtained.

The oil palm molded body according to claim 2 is obtained by drying a predetermined length of oil palm material, laminating a plurality of sheets, and controlling heating and extending in a parallel direction along the surface of the laminated oil palm material, In the oil palm molded body formed by compressing by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material, and then maintaining the compression and lowering the temperature and fixing,
A plurality of the laminated oil palm materials are overlapped so that the plurality of oil palm materials are curved only in a specific perpendicular direction to the surface.
In this way, oil palm materials are laminated with each other in consideration of the fiber direction, and compressed by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm materials. It can be molded according to the shape of the mold. Further, when a plurality of the oil palm materials are overlapped, the plurality of oil palm materials are crossed so that only one or two of the fiber directions intersect, or the total number of the fiber palm materials are stacked so that the fiber directions are parallel, Since the surface is curved only in a specific perpendicular direction, it can be formed into a desired curved shape. In particular, the mechanical strength can be determined by the shape or compression depth of the compressed surface of the oil palm molded body, and a desired oil palm molded body can be obtained.
Therefore, the laminated plywood itself made of oil palm material can be molded into the desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and components inherent to oil palm are used. An oil palm molding that is environmentally friendly can be obtained.

The oil palm molded body according to claim 3 is obtained by forming one or more of a plane portion, a concave portion, and a convex portion with a mold on the oil palm material of the predetermined length, and therefore the effect according to claim 1 or claim 2. In addition, an oil palm molding can be easily obtained.

According to a fourth aspect of the present invention, there is provided a method for producing an oil palm molded body, in which a predetermined length of an oil palm trunk is stripped to a predetermined thickness with a rotary race in a circumferential direction in a thin plate process to form a plurality of oil palm materials. The oil palm material formed in the thin plate process is dried, and a plurality of oil palm materials dried in the drying process are laminated in a predetermined state in the lamination process. And it heats to raise the temperature of the oil palm material laminated | stacked at the said lamination | stacking process in a heating process, With respect to the surface of the said oil palm material to the said laminated | stacked oil palm material heated by the said heating process by the compression process The upper and lower molds of the mold are compressed in a direction perpendicular to the surface of the oil palm material while being restricted from extending in the parallel direction, and compression-molded for a predetermined time. The laminated oil palm material compressed for a predetermined time in the process is cooled and fixed by lowering the temperature supplied in the heating process.
As described above, the plurality of oil palm materials formed by peeling to a predetermined thickness can be formed to a necessary thickness in the laminating step, and therefore the thickness can be determined according to the intended use. In the heating step of heating to raise the temperature of the oil palm material laminated in the laminating step, in particular, when a plurality of oil palm materials are heated with water vapor, resin components such as lignin and sugars such as cellulose and hemicellulose are produced. Since it is softened and bonded, a solid oil palm molded body can be obtained by the fixing process.
The laminated oil palm material is perpendicular to the surface of the oil palm material between the upper mold and the lower mold of the mold while restricting the oil palm material from extending in a direction parallel to the surface of the oil palm material. Since the compression of the direction is applied and compression molding is performed for a predetermined time, it can be compression molded without increasing the area of the laminated oil palm material, so that it has a desired three-dimensional shape and a desired outer shape. An oil palm molded body having a diameter is obtained. In particular, from the mold, the temperature supplied in the heating step is lowered to cool and fix, so that the oil palm molded body can be easily taken out.
Therefore, an oil palm molded body made of laminated oil palm materials can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and oil palm inherently has components An oil palm molded body that is environmentally friendly is obtained.

In particular, the temperature of the oil palm material laminated after the laminating step is heated to increase in the heating step, and the oil palm material heated in the compression step is restricted from extending in a direction parallel to the surface. However, the compression force applied in the compression process escapes in the direction parallel to the surface of the oil palm material because the compression force in the direction perpendicular to the surface of the oil palm material is applied and compressed for a predetermined time. The stretch of the oil palm material is effectively used, the outer dimensions of the oil palm material can be made uniform, and the compression rate of the whole oil palm material can be reduced. It can be set to a value according to the tree species, and waste is not produced from a plurality of oil palm materials during production.
Therefore, the use ratio of the resin component and sugar component contained in the oil palm material is increased, and a multilayer plywood bonded with a natural product can be obtained, the loss of the material used is reduced, the cost is reduced, and sick house syndrome is caused. A laminated plywood utilizing the components inherently possessed by oil palm can be obtained by suppressing the amount of formaldehyde-based adhesive used.

In addition, since the palm of the oil palm has no nodes or annual rings, when a thin plate is produced by peeling it off from the outer periphery with a rotary race, a uniform thin plate is obtained. As a result, the laminated plywood made of the thin plate is homogeneous. It will be something. Moreover, since the joining force is changed by the resin component and sugar component contained in the trunk of the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force.
Also, the temperature of the oil palm material laminated after the laminating step is heated to increase in the heating step, and the laminated oil palm material heated in the compression step is parallel to the surface of the oil palm material. Since the compression is performed for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material while restricting the extension, the compression force applied in the compression process is applied to the surface of the oil palm material. Elongation to escape in parallel direction is limited, the compressive force of all laminated oil palm materials can be used effectively, and the outer dimensions of oil palm materials can be made uniform, and all oil palm materials The compression ratio of the oil palm can be made uniform, and no waste is produced from the plurality of oil palm materials during the production.

The plurality of thin plates are joined by a resin component and a sugar component contained in the trunk of the oil palm itself to form the laminated plywood, and other synthetic resins and synthetic rubbers are used as adhesives. Because it is not, it can be returned to nature and will not cause pollution problems. Furthermore, the compression force when joined by the resin component and sugar component contained in the oil palm itself eliminates the gaps in the thin plate, resulting in a dense structure, so that it has water resistance and is waterproof and insect-proof. It has a long service life even when used as a building material. In addition, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface generated during the formation, the mechanical joining using the molding capability is also included in the joining here. Yes.

In this way, a plurality of oils each having a thickness of 1 mm or more when the oil palm trunk having a predetermined length is formed by peeling it to a predetermined thickness with a rotary race while rotating it in the circumferential direction and then compacting it. Palm material can be compressed and fixed at the same time and joined together. In particular, the temperature of the oil palm material laminated after the laminating step is heated to increase in the heating step, and the laminated oil palm material heated in the compression step is parallel to the surface of the oil palm material. Since the compression is applied for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material while restricting the extension, the compression force applied in the compression process is applied to the surface of the oil palm material. Elongation of escape in parallel direction is limited, the compression force of all laminated oil palm materials can be used effectively, and the compression rate of all oil palm materials can be made uniform, There is no waste from oil palm material.
Therefore, using the resin component and sugar component contained in the oil palm material, a multi-layer plywood bonded with natural products can be obtained, the cost of the material used is reduced, the cost is reduced, and formaldehyde-based adhesion that causes sick house syndrome The use of the agent is suppressed, and an oil palm molded body using components inherent in oil palm is obtained. Compared to at least conventional laminated plywood, the use of formaldehyde-based adhesive that causes sick house syndrome can be suppressed.

The method for producing an oil palm molded body according to claim 5 is to form a plurality of oil palm materials by stripping a predetermined length of an oil palm trunk to a predetermined thickness with a rotary race in the circumferential direction in a thin plate process, and in the drying process, The oil palm material formed in the thin plate process is dried, and a plurality of oil palm materials dried in the drying process are laminated in a predetermined state in the lamination process. And it heats so that the temperature of the oil palm material laminated | stacked in the preheating process may be raised, and it extends in the parallel direction along the surface of the said oil palm material to the said laminated oil palm material heated by the said preheating process. The upper mold and the lower mold of the mold are subjected to a compression force in a direction perpendicular to the surface of the oil palm material for compression for a predetermined time, and are subjected to a predetermined time in the compression process by a preliminary fixing process. The laminated oil palm material that has been compression-molded is cooled and fixed by lowering the temperature supplied in the preliminary heating step in the preliminary fixing step, and the laminated oil palm material is fixed in the final fixing step. While the palm material is controlled to extend in a parallel direction along the surface of the laminated oil palm material under predetermined humidity and temperature conditions, the lamination is performed between the upper mold and the lower mold of the mold. Is a predetermined time compression molded by adding a compressive force in the direction perpendicular to the plane of the oil palm material was, but for immobilizing by lowering the temperature of the laminated oil palm material was compression-molded the predetermined time.
In addition, depending on the form or use object of the oil palm molded body, the preheating step, the precompression step, the prefixing step, or the main fixing step may include the preheating step, the precompression step, and the prefixing step. The preliminary process can be repeated one or more times, or the main immobilization process can be repeated one or more times as the main process.

Thus, a thin plate process to be formed on a plurality of oil palm materials, a drying process of the oil palm materials, a laminating process of laminating a plurality of oil palm materials, a preheating step of heating the oil palm materials, and the heating Applying a compression force in a direction perpendicular to the surface of the oil palm material between the upper mold and the lower mold of the mold while restricting extending in parallel along the surface of the oil palm material. The pre-compression process and the pre-fixing process in which the temperature supplied in the pre-heating process is lowered and cooled and fixed are the pre-molding process of the pre-oil palm molding. This oil palm molded body is a plate shape compressed at a compression ratio of 2/5 to 4/5, or a solid body compressed at a compression ratio of 2/5 to 4/5 with respect to the entire oil palm molded body. It may be a shape body. At this time, it is restricted from extending in the parallel direction along the surface of the heated oil palm material, and is molded into a finished dimension. Further, at this time, if the amount of water vapor pressure to be supplied is reduced and the molding is performed, it is easy to process the subsequent fixing step.
In this way, the laminated oil palm material fixed in the preliminary immobilization process again extends in a parallel direction along the surface of the laminated oil palm material under predetermined humidity and temperature conditions. While being regulated, a compression force in a direction perpendicular to the surface of the laminated oil palm material is applied between the upper mold and the lower mold of the mold so as to compress and mold for a predetermined time, and then compressed and molded for the predetermined time The laminated oil palm material is cooled by lowering the temperature, and is permanently fixed in the final fixing step.

Therefore, a plurality of oil palm materials formed by peeling to a predetermined thickness can be formed to a necessary thickness in the laminating process, the thickness can be determined according to the intended use, and the preliminary molding process of the preliminary oil palm molded body By providing in the molding process, a highly accurate molded body can be obtained in the present immobilization process. In the heating step of heating to raise the temperature of the oil palm material laminated in the laminating step, in particular, when a plurality of oil palm materials are heated with water vapor, resin components such as lignin and sugars such as cellulose and hemicellulose are produced. Since it is softened and bonded, a solid molded body can be obtained by this fixing process.

In addition, the laminated oil palm material is restricted to extend in a direction parallel to the surface of the oil palm material even in the final fixing step, and the oil palm material is formed between the upper mold and the lower mold of the mold. Since the compression force in a direction perpendicular to the surface of the material is applied and compression molding is performed for a predetermined time, the area of the laminated oil palm material can be compression-molded without being expanded, so that the desired three-dimensional shape can be obtained. There is obtained an oil palm molded body having a desired outer diameter. In particular, even in the preliminary fixing step or the main fixing step, the mold is cooled and fixed by lowering the temperature supplied in the heating step. The palm molding is easy to take out. Moreover, the said thin-plate process of an oil palm molded object can suppress use of the formaldehyde type adhesive agent which causes a sick house syndrome at least compared with the conventional laminated plywood.
Therefore, an oil palm molded body made of laminated oil palm materials can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and oil palm inherently has components An oil palm molded body that is environmentally friendly is obtained.

The laminated plywood according to claim 6 includes one or more oil palm materials formed by peeling a trunk of a predetermined length of oil palm to a predetermined thickness while rotating a trunk of the oil palm in a circumferential direction thereof, One or more of Lauan thin plate, China thin plate, or conifer thin plate formed by peeling a conifer trunk in the circumferential direction while rotating it in the circumferential direction with a predetermined thickness facing the oil palm material They are placed, compressed, fixed and joined together.
Therefore, since one or more oil palm materials are compressed and fixed simultaneously with the net and integrally joined together, a multilayer plywood joined with natural products using the resin component and sugar component contained in the oil palm material is obtained. can get. Particularly, since one or more nets are arranged between the oil palm materials and one or more nets are joined between the oil palm materials, the nets are joined between the oil palm materials. Since the amount of the resin component and the sugar component contained in the oil palm material at the time of joining from between the oil palm materials is ensured without using another adhesive, the oil palm material is integrated. It is easy to join the material and the net, and even if the oil palm material tries to bend, the net does not expand or contract corresponding to the bend, so it can be provided as means for preventing the bend. Moreover, it becomes difficult to bend with respect to the surface which laminated | stacked the said oil palm material by arrange | positioning a net | network in a several location.
Therefore, the mechanical strength of the laminated plywood itself is increased, and the use of formaldehyde-based adhesives that cause sick house syndrome is suppressed. can get.

The laminated plywood according to claim 7 includes one or more oil palm materials formed by peeling a trunk of a predetermined length of oil palm in a circumferential direction while rotating the trunk of the oil palm to a predetermined thickness with a rotary race, and a predetermined length of lauan or A lauan thin plate formed by peeling a trunk of a Chinese or coniferous tree in the circumferential direction while peeling it off from the outer periphery to a predetermined thickness, or one or more of a Chinese thin plate or a softwood thin plate facing the oil palm material Are arranged and joined together.
Therefore, at least one oil palm material that has been compacted and one or more of Lauan thin plate, China thin plate, and softwood thin plate are placed facing the oil palm material, and they are joined together. Therefore, when the resin component and sugar component contained in the oil palm material are insufficient, an adhesive is added and bonded to one or more of Lauan thin plate, China thin plate, and softwood thin plate. Thus, a desired laminated plywood is obtained.

Since one or more nets are arranged between the oil palm materials, and one or more nets are joined between the oil palm materials, the nets are joined between the oil palm materials, and integrated Since the amount of the resin component and the sugar component contained in the oil palm material at the time of joining from between the oil palm materials is ensured without using other adhesives, the oil palm material and Joining with a net is easy, and even when the oil palm material is going to bend, the net does not expand or contract corresponding to the bend, so it can be provided as means for preventing the bend. Moreover, it becomes difficult to bend with respect to the surface which laminated | stacked the said oil palm material by arrange | positioning a net | network in a several location.
Therefore, the mechanical strength of the laminated plywood itself is increased, and the use of formaldehyde-based adhesives that cause sick house syndrome is suppressed. can get.

The laminated plywood according to claim 8 includes one or more oil palm members formed by peeling a trunk of a predetermined length of oil palm in a circumferential direction while rotating the trunk of the predetermined length from the outer periphery to a predetermined thickness, and a predetermined length of lauan or One or more of lauan, china, and conifers, which are formed in the shape of a plate in the length direction of the trunk of a china or conifer, are placed facing the oil palm material and joined together. is there.
Therefore, at least one compacted oil palm material and one or more plate materials of lauan, china, and conifer are arranged facing the oil palm material, and they are joined together. From the above, when the resin component and the sugar component contained in the oil palm material are insufficient, by adding an adhesive to one or more joining objects of Lauan, China, and coniferous trees, A laminated plywood is obtained.

The laminated plywood according to claim 9, wherein the resin palm and the sugar component contained in the oil palm material are used for joining one or more oil palm materials which are arranged facing the oil palm material and are integrally joined together. In addition to the resin component and the sugar component contained in the oil palm material, another adhesive is added to the joint surface that is integrally joined to one or more of the thin plate, the Chinese thin plate, or the softwood thin plate. In addition to the effects of claim 7 or claim 8, the resin component and the sugar component contained in the oil palm material are used for joining one or more oil palm materials, and the Lawan thin plate or the Chinese thin plate is further used. Or, one or more of the softwood sheets can be firmly joined, so the use of formaldehyde adhesives that cause sick house syndrome is suppressed, and oil palm inherently has Laminated plywood using there ingredient.

The laminated plywood according to claim 10, wherein the number of the oil palm materials is larger than the number of thin plates other than the oil palm, and in addition to the effect according to one of claims 6 to 9. In comparison with at least conventional laminated plywood, the use of formaldehyde-based adhesive that causes sick house syndrome can be suppressed to ½ or less.

Since the net | network arrange | positioned between the said oil palm materials of the laminated plywood concerning invention of Claim 11 and joining between the said oil palm materials is a wire net | network, 1 of Claim 6 thru | or 10 In addition to the effects described above, the molding temperature can be arbitrarily set. Also, the mechanical strength is increased.

Since the net | network arrange | positioned between the said oil palm materials of the laminated plywood concerning invention of Claim 12 and joining between the said oil palm materials is made into the net | network of a chemical fiber or a vegetable fiber, Claim 6 In addition to the effect of one of the thirteenth to eleventh aspects, the use of a net of chemical fibers or plant fibers can be made inconspicuous. Also, the mechanical strength is increased. In the case of chemical fibers, if they are bonded at the bonding temperature between the oil palm materials and the melting temperature of the melting temperature of the chemical fibers, a strong integration becomes possible due to a synergistic effect.

FIG. 1 is an explanatory diagram of a process for producing an oil palm material by a rotary race in the method for producing an oil palm molded body according to Embodiment 1 of the present invention. FIG. 2 is an explanatory diagram of a laminating process showing a laminating positional relationship of the oil palm material in the manufacturing method of the oil palm molded body according to Embodiment 1 of the present invention, and is an explanatory diagram of cutting out an oil palm material long on the vascular bundle side (a ) And an explanatory view (b) of cutting out an oil palm material short on the vascular bundle side. FIG. 3 is an explanatory view showing a method for laminating an oil palm material in the method for producing an oil palm molded body according to Embodiment 1 of the present invention. FIG. 4 is an explanatory view showing a laminated state (a) and a compressed state (b) of the method for producing an oil palm molded body according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view showing a schematic configuration of an oil palm molded body manufacturing apparatus employing the method for manufacturing an oil palm molded body according to Embodiment 1 of the present invention. 6A and 6B are explanatory diagrams of the method for producing the oil palm molded body according to Embodiment 1 of the present invention, in which FIG. 6A is an explanatory diagram of supply of unprocessed wood as a raw material, and FIG. (C) is explanatory drawing by a sealed heating compression start state, (d) is explanatory drawing of the vapor pressure control processing by a sealed heating compression state, (e) is explanatory drawing by a sealed cooling state, (f) is an oil palm molded object It is explanatory drawing of taking out. FIG. 7 is an explanatory view of a frame used in the method for manufacturing an oil palm molded body according to Embodiment 1 of the present invention, and is a perspective view (a) and a cross-sectional view taken along a cutting line AA (b). FIG. 8 is a flowchart illustrating a method for manufacturing the oil palm molded body according to Embodiment 1 of the present invention. FIG. 9 is an explanatory view showing a laminated state (a), a compressed state (b), and a molded state (c) of the method for producing an oil palm molded body according to Embodiment 2 of the present invention. FIG. 10 is a flowchart of a preliminary process for explaining a method for producing an oil palm molded body according to Embodiment 2 of the present invention. FIG. 11 is a flowchart of the present immobilization step for explaining the method for producing an oil palm molded body according to Embodiment 2 of the present invention. FIG. 12 is an explanatory view showing a method for producing an oil palm molded body according to another embodiment (case 1) of the present invention, in which a plate-shaped preliminary oil palm molded body (a), a preformed leg (b), and an oil are formed. Palm molded body (c). FIG. 13 is an explanatory view showing a method for producing an oil palm molded body according to another embodiment (case 2) of the present invention, in which a plate-shaped preliminary oil palm molded body (a), a preformed leg (b), and an oil are formed. Palm molded body (c). FIG. 14 is an explanatory view showing a method for producing an oil palm molded body according to another embodiment (case 3) of the present invention. FIG. 15 is an explanatory view showing a method for producing an oil palm molded body according to another embodiment (case 4) of the present invention. FIG. 16 is an explanatory view showing a method for producing an oil palm molded body according to another embodiment (case 5) of the present invention. FIG. 17 is an explanatory view showing a method for producing an oil palm molded body according to another embodiment (case 6) of the present invention. FIG. 18 is an explanatory view showing the laminated positional relationship between the thin plate and the net for forming the laminated plywood according to the third embodiment of the present invention, and is an explanatory view (a) of cutting out the long oil palm material on the vascular bundle side. It is explanatory drawing (b) of cutting out a short oil palm material. FIG. 19 is an explanatory diagram showing a method of laminating thin plates and nets to obtain a laminated plywood according to Embodiment 3 of the present invention. FIG. 20 is an explanatory view showing a laminated state (a) and a compressed state (b) of the laminated plywood according to Embodiment 3 of the present invention. FIG. 21 is an explanatory view showing a method for laminating an oil palm material and a net for obtaining a laminated plywood according to Embodiment 4 of the present invention. FIG. 22 is an explanatory diagram showing another method of laminating thin wood boards, oil palm materials, and nets to obtain laminated plywood according to Embodiment 5 of the present invention. FIG. 23 is an explanatory view showing a method of laminating a thin plate and a net for forming a laminated plywood according to Embodiment 6 of the present invention, in which (a) is a plywood, (b) is a leg of a joining component, and (c) is integrally formed. It is the formed oil palm molding. FIG. 24 is an explanatory diagram showing a method of laminating thin plates and nets to obtain a laminated plywood according to Embodiment 7 of the present invention.

WD Oil palm trunk W, W1,..., W5 Oil palm material UWD Continuous thin plate Y1 Thin plate PW Laminated plywood NW Multi-layer material MC before press Compaction processing material manufacturing device EO Oil palm molding HW Preliminary oil palm molding IS Inside Space 10 Press panel 18 Positioning hole 20 Frame

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the embodiments, the same symbols and the same reference numerals in the drawings are the same or corresponding functional parts, and therefore, redundant description thereof is omitted here.

[Embodiment 1]
First, when the oil palm trunk WD used in the embodiment of the present invention is cut so that the wood grain and the grid are made, the fibers (vascular bundles) are arranged in a grid pattern. That is, there are no annual rings like Japanese timber and cedar, and vascular bundle fibers of 0.4 to 1.2 mm extend in the length direction of the oil palm trunk WD, like cypresses.
The components of oil palm trunk WD are slightly different depending on the place of production, but the difference is slight, generally 30.6% by weight of cellulose, 33.2% by weight of hemicellulose, lignin (total lignin 28.5% by weight = Klarson lignin 24.7% by weight + acid-soluble lignin (3.8% by weight), extracted component 3.6% by weight, ash content 4.1% by weight, Characterization in Chemical Composition of the Oil Palm (Elaeis guineensis) (Journal of the Japan Institute of Energy, 87, 383-388 (2008)).
Visible fibers of 0.4 to 1.2 mm, that is, between the vascular bundles are parenchyma cells, which are united by resin components such as lignin, sugars such as cellulose and hemicellulose, and a small number of pores.

Formation of the oil palm material which consists of a thin plate which comprises the oil palm molded object concerning this Embodiment is demonstrated using FIG.
The oil palm material W cuts a single trunk that has grown for more than 20 years as an oil palm trunk WD of a predetermined length, and sets it in a device called a rotary race that peels in the circumferential direction similar to wig removal of a radish. . Then, the oil palm trunk WD is rotated to perform circumferential stripping with the blade CT. This is a thin plate process in which a predetermined length of the oil palm trunk WD is peeled off from the outer periphery to a predetermined thickness by a rotary race while being rotated in the circumferential direction to form a plurality of oil palm members W.

As shown in FIG. 1, the center of the oil palm trunk WD is rotated so as to be an axis, and a cutter CT having a predetermined width is applied to the outer peripheral side thereof, and a continuous thin plate UWD is formed by so-called stripping similar to wig stripping. . That is, the oil palm trunk WD is cut out from a continuous thin plate, ie, a continuous thin plate UWD, with a predetermined thickness like radish wig peeling. The continuous thin plate UWD is cut into a predetermined length and dried to produce an oil palm material W having a predetermined area and a predetermined thickness.
Oil palm leaves, empty fruit bunches, roots, and the like are cut into chips and treated by an organic waste fermentation treatment method in which they are composted (composted) by aerobic bacteria treatment. In particular, empty fruit bunches may be subjected to other practical treatments. Further, it may be finely crushed, extracted with components such as cellulose, hemicellulose, lignin, etc., and used for joining assistance.

Usually, drying is started when the continuous thin plate UWD is peeled off. However, drying may be performed after cutting the number of units to make a predetermined laminated plywood PW. In general, since the cutting is performed by a flow operation, it is desirable to start drying at the time when the continuous thin plate UWD is formed from the oil palm trunk WD from the viewpoint of securing the drying time. This drying process is a drying process after five pieces of oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness are cut so as to overlap the pre-pressing multilayer material NW for creating the laminated plywood PW. If it exists, it is desirable because chips at the end of the continuous thin plate UWD are difficult to be produced, but there is no significant difference after the time when the continuous thin plate UWD is formed from the oil palm trunk WD. In any case, the process of drying these oil palm materials W is a drying process.
The oil palm material W having a predetermined area and a predetermined thickness is further cut as shown in FIGS. 2 (a) and 2 (b), and five oil palm materials W1,. .., W5 (specially, when the number of oil palm materials W is not intended, simply written as oil palm material W) is cut.
The process of FIG. 1 is not different for a predetermined length of Lauan or Sina or conifer trunk. A Lawan thin plate, a Chinese thin plate, or a coniferous thin plate formed by peeling a lawan, a Chinese or coniferous trunk in a circumferential direction while rotating it in the circumferential direction, is formed by a similar process.

Next, as shown in FIG. 3, a case where a total of five oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness (thin plate) are laminated to form a multilayer material NW before pressurization will be described. .
The pre-pressing multilayer material NW includes oil palm materials W1, W3, W5 having short sides in the supply direction of the continuous thin plate UWD that has been peeled off the oil palm trunk WD described with reference to FIG. Oil palm materials W2 and W4 having long sides in the supply direction of the continuous thin plate UWD shown in FIG.
The five oil palm members W1,..., W5 having a predetermined area and a predetermined thickness may be formed by cutting, or may be formed by cutting a fine toothed saw. Any of the properties of oil palm may be used, but cutting is more efficient from the viewpoint of workability.

In the present embodiment, oil palm materials W1, W3, W5 with short sides in the supply direction of the continuous thin plate UWD from which the oil palm trunk WD has been peeled, and oil palm materials W2, with long sides in the supply direction of the continuous thin plate UWD are provided. Although W4 is formed of two types of rotary races, it may be set so that five oil palm materials W1,..., W5 are obtained with the width in the supply direction of the continuous thin plate UWD. In any case, as shown in FIG. 3, oil palm materials W1, W3, W5 with short sides in the supply direction of continuous thin plate UWD and oil palm materials W2, W4 with long sides in the supply direction of continuous thin plate UWD are mutually connected. What is necessary is just to load the multilayer material NW before pressurization so that the length direction of the fiber becomes a right angle.
Of course, the oil palm materials W1, W3, W5 with short sides in the supply direction of the continuous thin plate UWD and the oil palm materials W2, W4 with long sides in the supply direction of the continuous thin plate UWD shown in FIG. Are loaded with two oil palm materials W1, W3, W5 on the short side in the supply direction of the continuous thin plate UWD, and three oil palm materials W2, W4 on the long side in the supply direction of the continuous thin plate UWD. It can also be a combination.

Five oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness are cut and the humidity is adjusted until it is aligned with the stacked state of the multilayer material NW before pressurization as shown in FIG. Must be applied to both sides of the oil palm materials W1,..., W5 having a predetermined area and thickness. Since the five oil palm materials W1,..., W5 are dried before being sent to the production line where five oil palm materials W1,. In the dried state, as shown in FIG. 4A, it can be laminated as a multilayer material NW before pressurization. When this lamination is performed, in order to prevent the spread of the oil palm material W in the surface direction, a frame body 20 (see FIG. 7) for positioning each side of the five oil palm materials W1,. It is desirable to set holes 18 (see FIG. 5). For the sake of simplicity, FIGS. 5 and 6 will be described with reference to the case of the positioning hole 18.
Thus, the process of laminating a plurality of oil palm materials W dried in the drying process in a predetermined state is referred to herein as a laminating process.

The positioning hole 18 has an outer diameter that matches the outer shape of the oil palm material W, and the five oil palm materials W1,..., W5 are placed in the positioning hole 18. Then, the upper press panel 10A and the lower press are controlled while the positioning hole 18 restricts the oil palm material W heated in the heating process from extending in the parallel direction along the surface of the oil palm material W. A compression force in a direction perpendicular to the surface of the oil palm material W is applied to the board 10B and compression molding is performed for a predetermined time. Although not shown, the five oil palm members W1,..., W5 are compressed in the positioning hole 18. The surface of the upper press panel 10A that presses the five oil palm members W1,..., W5 is equal to the upper surface of the five oil palm members W1,. Naturally, the bottom surfaces of the five oil palm materials W1,..., W5 have the same dimensions so that they can be fitted to the lower press panel 10B.

First, a method for molding the oil palm molded body EO of FIG. 4B directly from the pre-pressing multilayer material NW of FIG. 4A will be described first.
Here, the compacted oil palm molded body EO shown in FIG. 4 (b) is compressed by applying a predetermined compressive force to a multi-layered material NW before pressurization under a predetermined temperature condition. After the elapse of time, the pressure is lowered to a predetermined temperature to fix the predetermined compression rate to be fixed in substantially the same manner as in the compressed state, and is fixed.
That is, a compression step of applying a compression force in a direction perpendicular to the surface of the oil palm material W to the laminated oil palm materials W1,..., W5 heated by the heating step is performed. After pressing for a predetermined time at the temperature, the temperature supplied in the heating step is lowered, and the compressed oil palm molded body EO is obtained through an immobilization step for maintaining the compressed state.
Here, the process of heating to raise the temperature of the laminated oil palm material W after the laminating process is called a heating process, and the surface of the laminated oil palm material W is heated by the heating process. The step of applying a compressive force in a right angle direction is called a compression step. Then, after pressing for a predetermined time in the compression step, the temperature supplied in the heating step is lowered, and the step of cooling and fixing at normal temperature or slightly lower than that is fixed in a consolidated state. This is called an immobilization process.
Moreover, the method of directly molding the oil palm molded body EO of FIG. 4B from the pre-pressing multilayer material NW of FIG. 4A includes the laminating step, the heating step, the compression step, and the fixing step. There is only one continuous process.

4 is one form of the oil palm molded body EO of FIG. 4B in which the pre-pressing multilayer material NW of FIG. 4A is consolidated with a mold. In particular, in the present embodiment, in order to finally form the oil palm molded body EO, it is compressed in a concavo-convex state from the beginning with a mold, directly from the multilayer material NW before pressurization of FIG. The flat part EP of the oil palm molding EO of FIG.4 (b), the recessed part EQ, and the convex part ER are formed with the same thickness. In the case of carrying out the present invention, the flat part EP and the concave part EQ or the convex part ER may not be the same thickness but may be partially thick and thin.

First, the procedure for producing the oil palm molded body EO according to the embodiment of the present invention will be described with reference to FIGS.
As shown in the flowchart of FIG. 8, first, a predetermined length of the oil palm trunk WD is peeled to a predetermined thickness with a rotary race blade CT while rotating in the circumferential direction to form a plurality of oil palm members W. In the thin plate process of Step S10, the oil palm material W having a thickness within the range of 3 mm to 20 mm is peeled from the oil palm trunk WD, and then in the drying process of Step S11, the moisture content is within the range of 5% to 30%. The dried oil palm material W is obtained.

Here, the drying method of the oil palm material W in the drying process includes artificial drying or natural drying (sun drying). As the artificial drying, for example, hot air is supplied to the oil palm material W using a dryer such as a steam dryer having a high-temperature steam as a heat source and a dehumidifier including a refrigerator for removing humidity. Examples include an external heating method for heating from the outside of the oil palm material W by spraying or heating and squeezing with a press board, an internal heating method for heating the oil palm material W from the inside by applying dielectric heating, As is well known, in general, natural drying is less expensive than artificial drying.

However, when the oil palm material W is naturally dried, in particular, when the oil palm material W is thick, bacteria such as mold are prone to grow and corrode, and productivity and commercial value are impaired. This is commonly used for building materials, for example, Lauan wood forms a secondary xylem composed of cell (dead cell) tissue in which the movement of water and nutrients has stopped. This is because palm stem WD is composed only of primary tissues of vascular bundles and parenchymal cells, and most cells centering on parenchymal cells are living cells in which water and nutrients are transferred, and the moisture content is extremely high. Furthermore, it has been found that oil palm trunk WD (oil palm trunk) is rich in saccharides (eg, fructose, glucose, fructooligosaccharides, inositol, etc.). When the thickness of the oil palm material W obtained from the trunk of the palm is thick, bacteria such as mold are proliferated and corroded easily in natural drying, and productivity and commercial value are impaired.
Therefore, according to the experiments by the present inventors, by reducing the thickness of the oil palm material W obtained from the oil palm trunk WD to a range of 20 mm or less, the product value and productivity decrease due to bacteria such as mold even in natural drying. It has been confirmed that the cost can be reduced without incurring cost. Note that this thickness corresponds to a thickness of 3.5 mm to 7.0 mm after compaction when the compression ratio is 65%. If the compression ratio is 70%, the thickness corresponds to 3.0 mm to 6.0 mm after the consolidation.

Furthermore, according to the experiments by the present inventors, when the thickness of the oil palm material W obtained from the oil palm trunk WD is less than 3 mm (when it is less than 0.9 to 1.1 after the consolidation process), the thickness Since it is thin, it is easy to cut when it is peeled off, and when it exceeds 20 mm, it is difficult to dry uniformly to the inside, and when it is stretched, it becomes easy to crack, so deformation and swelling are likely to occur after consolidation processing described later. It has also been confirmed that cracks and the like are likely to occur because the curved surface is replaced with a straight line. In addition, about a crack, it joins in a close_contact | adherence state at the time of a compaction process, and there is no problem as long as a mold | fungi does not arise in the crack generating location.
For this reason, the oil palm material W having a thickness of 3 mm or more and 20 mm or less is peeled off from the oil palm trunk WD and can be dried at low cost without causing deterioration of the product value or productivity due to bacteria such as mold even by natural drying. Further, the cutting operation is easy, and the dimensional shape stability after the compacting process described later is high.
Preferably, the thickness of the oil palm material W from the oil palm trunk WD is in the range of 6 mm or more and 15 mm or less. This thickness corresponds to a thickness of 2.1 mm or more and 5.3 mm or less after the compacting when the compression ratio is 65%. If the compression ratio is 70%, the thickness corresponds to 1.8 to 4.5 mm after the consolidation.

In addition, when the moisture content of the dried oil palm material W is less than 5% as a result of repeated experiments by the present inventors, the term “drying within the range of 5 to 30% moisture content” is performed by compaction processing described later. Insufficient chemical change can be caused, and when the surface is too dry and wetted with water after consolidation, the compressed part returns to its original thickness shape, so-called immobilization failure. On the other hand, when the moisture content exceeds 30%, it is difficult to uniformly dry to the inside, and it has been confirmed that after consolidation, damage such as cracks, rupture, deformation, swelling, etc. are likely to occur. This is a setting based on this. In other words, it is desirable that the moisture content of the oil palm material W be substantially uniform over the entire thickness so that the entire thickness is compacted with a substantially uniform compression rate, and the moisture content is within a range of 5 to 30%. Is preferred. More preferably, the water content is in the range of 13 to 18%. In addition, a moisture content is measured using measuring instruments, such as a high frequency moisture content meter, for example.

Next, the lamination process of step S12 which laminates a plurality of dried oil palm materials W is performed. That is, it is a step of laminating a plurality of oil palm materials W dried in the drying step of Step S11 in a predetermined state. The pre-pressurized multilayer material NW is obtained by the lamination step in step S12. The multi-layer material NW before pressurization has the same outer shape, but the oil palm materials W in the stacking direction are merely overlapped by their own weight.
Here, the compacted material manufacturing apparatus MC that performs the compacting of the pre-pressing multilayer material NW formed by laminating the oil palm material W will be described with reference to FIG.

In FIG. 5, the compacted material manufacturing apparatus MC for manufacturing the oil palm molded body EO of the present embodiment mainly includes an upper press 10 </ b> A including a flat part EP and a mold that forms a convex part EQ on the flat press part 10 </ b> A. The press panel 10 in which the internal space IS and the positioning hole 18 are formed by the structure divided into the part EP and the lower press panel 10B made of a mold on which the recess ER is formed, and the peripheral portion 10b of the lower press panel 10B Is positioned on the peripheral edge portion 10a of the upper press panel 10A, and the lower press panel 10B is formed with a positioning hole 18 for determining and regulating the position of the multilayer material NW before pressurization. The seal member 11 that seals the internal space IS and the positioning hole 18 in the range of the upper press board 10A is communicated with the internal space IS and the positioning hole 18 from the upper surface side of the upper press panel 10A. And the piping 12 having a piping port 12a for supplying steam into the positioning hole 18, the valve V4 on the upstream side thereof, and the inner space IS and the positioning hole 18 from the side surface side of the lower press panel 10B. Connected to the pipe 13 having a pipe port 13a for discharging water vapor from the space IS and the positioning hole 18, the pressure gauge P2 for detecting the vapor pressure in the pipe 13, the valve V5 on the downstream side thereof, and the valve V5 It consists of a drain pipe 14 and the like.

The press panel 10 has a plane size capable of compressing the entire specific surface perpendicular to the surface of the multilayer material NW before pressurization, that is, the entire surface to be compressed of the multilayer material NW before pressurization, The material is not particularly limited, but, for example, it is formed of a material such as stainless steel or aluminum so that the wood is not blackened due to iron ion contamination, or the contact surface with the multilayer material NW before pressurization is plated. It is given. Furthermore, the material of the seal member 11 that seals the internal space IS and the positioning hole 18 is not particularly limited, but usually, silicon rubber, silicon resin, etc. excellent in heat resistance and water resistance are used. .
Of course, the mold of the press panel 10 may be any one having at least one of a flat portion, a concave portion, and a convex portion, and does not affect singular or plural picking.

Further, in the upper press board 10A and the lower press board 10B of the press board 10,

pipe lines

15 and 16 are formed for raising the temperature to a desired temperature by passing high-temperature steam. Pipes ST2 and ST3 branched from the steam supply side pipe ST1 and steam discharge side pipes ET1 and ET2 are connected to the

paths

15 and 16, respectively. Further, in the middle of the steam supply side pipes ST1, ST2, ST3, valves V1, V2, V3 and a pressure gauge P1 for detecting the steam pressure in the pipe ST1 are arranged, and the steam discharge side pipes ET1, ET2 Is connected to the drain pipe 14 via a valve V6.

In addition, the boiler apparatus which supplies water vapor | steam to piping ST1, and the press raising / lowering apparatus containing the hydraulic mechanism for raising / lowering and pressurizing the upper press board 10A with respect to the lower press board 10B of the fixed side of the press board 10 are abbreviate | omitted. Has been.
In the first embodiment, the internal space IS formed by the upper press board 10A and the lower press board 10B of the press board 10 and the piping 12 connected to the valve V4 for heating the inside of the positioning hole 18 are used. Although water vapor is introduced, high frequency heating, microwave heating, or the like can also be used. In particular, for the high-frequency heating of wood, a method of heating from the center of wood at a high frequency slightly lower than that of microwave is preferable to dielectric overheating by microwave.

Further, on the press board 10, a cooling water supply side that cools to a desired temperature by passing low-temperature cooling water in place of water vapor through the

pipes

15 and 16 formed in the upper press board 10A and the lower press board 10B. Pipes ST12 and ST13 branched from the pipe ST11 are connected to the pipes ST2 and ST3, respectively. Further, valves V11, V12, V13 are arranged in the middle of the pipes ST11, ST12, ST13 on the cooling water supply side. In addition, the cooling water supply apparatus which supplies cooling water to piping ST11 is abbreviate | omitted.
Of course, when the present invention is carried out, a compressive force is applied in a direction perpendicular to the surface of the five oil palm members W of the multilayer material NW before pressurization in the press-pressing direction of the press board 10. .

When the oil palm molded body EO is manufactured from the pre-pressurized multilayer material NW by the compacted material manufacturing apparatus MC configured as described above, first, as shown in FIG. The upper press machine 10A is raised with respect to the lower press machine 10B on the fixed side of the press machine 10 in FIG. The internal space IS and the positioning hole 18 are placed.
Here, in the present embodiment, the pre-pressing multilayer material NW that is a raw material of the oil palm molded body EO is formed in a predetermined dimension (thickness, width, length), and a total of five sheets The surface sides of the oil palm materials W1,..., W5 are opposed to the upper press board 10A and the lower press board 10B of the press board 10, and are placed in the positioning holes 18 of the lower press board 10B.

Subsequently, as shown in FIG. 6B, the upper press platen 10A is lowered at a predetermined pressure with respect to the pre-pressing multilayer material NW placed on the positioning hole 18 of the fixed-side lower press platen 10B. In this embodiment, the upper surface of the pre-pressurized multilayer material NW, that is, the surfaces of the oil palm materials W1,. In step S13, timer control by the timer I is started. Looking at the timer I in step S13, it is determined whether it is the heating timing in step S14, and it is determined whether it is the compression timing in step S15.
At the heating timing, steam at a predetermined temperature (eg, 110 to 180 ° C.) is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B in step S16, and the interior space IS and the positioning holes 18 are passed. Is maintained at a predetermined temperature (for example, 110 to 180 ° C.). When it is determined in step S14 that it is not the heating timing, it is determined in step S15 whether it is the compression timing, and when it is the compression timing, the compression process is started in step S17.

That is, in step S17, the compression force of the upper press board 10A is set to a predetermined pressure (for example, 20 to 50 kg / cm ² ) with respect to the lower press board 10B on the fixed side, and the multilayer material NW before pressurization is the upper press board. 10A and the lower press panel 10B are heated and compressed for a predetermined time (for example, 5 to 40 min). Also, in step S18, it is determined whether the heating / compression is completed, and the routine processing from step S13 to step S18 is repeated until the end time is reached.
In order to prevent cracking, the compressive force in step S17 is the temperature rise of the multilayer material NW before pressurization, that is, the internal temperature state of the multilayer material NW before pressurization according to the elapsed time of the timer I in step S18. It is desirable to gradually increase with the passage of time, and it is preferable to set the heating and compression time in consideration of the heating time.

Furthermore, as shown in FIG. 6 (c), when the peripheral edge portion 10a of the upper press board 10A comes into contact with the peripheral edge part 10b of the lower press board 10B, the seal member 11 disposed on the peripheral edge part 10a of the upper press board 10A. The internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are hermetically sealed. Here, steam is supplied into the internal space IS and the positioning hole 18 through the pipe port 12 a of the pipe 12. At this time, the water vapor simultaneously wets the oil palm base material W or the pre-pressing multi-layer material NW before pressurization to a predetermined humidity with a good balance. Then, with the internal space IS and the positioning hole 18 sealed, the compression force from the upper press board 10A and the lower press board 10B is maintained, and the temperature reaches a predetermined temperature (for example, 150 to 210 ° C.) based on the timer I in step S13. Be raised.

In the first embodiment, the internal space IS when the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B of the press board 10 are in a sealed state via the seal member 11. The dimension interval in the vertical direction of the positioning holes 18 is set to the finished dimension in the thickness direction when the pre-pressing multilayer material NW becomes an oil palm molded body EO having a compression rate of 70% by the press board 10. For this reason, the compression ratio of the entire thickness of the multilayer material NW before pressurization, that is, the change in the plate thickness due to the compression of the multilayer material NW before pressurization, is that the peripheral portion 10a of the upper press panel 10A is It will be decided by contacting.

Then, in the sealed state of the internal space IS and the positioning hole 18 shown in FIG. 6C, the compressive force of the upper press board 10A and the lower press board 10B is maintained, and the internal space IS and the positioning hole 18 are kept at a predetermined temperature ( For example, a heat treatment is performed to form an oil palm molded body EO that is held for a predetermined time (for example, 30 to 120 minutes) and is not returned after the cooling compression is released. Is called. At this time, high-temperature and high-pressure vapor pressure is generated between the surrounding surface of the pre-pressurized multilayer material NW and the inside thereof through the internal space IS and the positioning hole 18 which are sealed by the upper press board 10A and the lower press board 10B. You can go in and out.
As described above, in the present embodiment, the upper press board 10A and the lower press board 10B are in surface contact with the front and back surfaces of the pre-pressurized multilayer material NW and are held in the sealed internal space IS and the positioning holes 18. Therefore, the multilayer material NW before pressurization is sufficiently heated in its entire thickness, and is efficiently compressed and deformed.

Next, as shown in FIG. 6D, when the heat compression process is performed in a sealed state of the internal space IS and the positioning hole 18, the internal space IS and the positioning hole are detected by the pressure gauge P2 as a vapor pressure control process. 18 vapor pressure is detected, and the valve V5 is appropriately opened and closed. Thereby, high-temperature and high-pressure water vapor is discharged from the internal space IS and the positioning hole 18 to the drain pipe 14 side through the pipe port 13a and the pipe 13, and in particular, the moisture content of the outer layer portion of the multilayer material NW before pressurization. Therefore, the excess internal space IS and moisture in the positioning hole 18 are removed, and the internal space IS and the positioning hole 18 are adjusted to have a predetermined vapor pressure. Further, if necessary, a predetermined vapor pressure can be supplied to the internal space IS through the pipe 12 and the pipe port 12a (FIG. 5) connected to the valve V4. As a result, the fixing of the heat compression treatment of the wood, that is, the so-called immobilization of the wood is further promoted.
Furthermore, the valve V5 is opened as a vapor pressure control process immediately before shifting from the heating compression to the cooling compression by the upper press panel 10A and the lower press panel 10B, so that the internal space passes through the piping port 13a and the piping 13. High-temperature and high-pressure steam is discharged from the IS and positioning hole 18 to the drain pipe 14 side.

If it is determined in step S18 that the heating process in step S16 and the compression process in step S17 based on the operation of the timer I in step S13 are completed, the fixing process is started in step S19. In the immobilization process, normal temperature cooling water or ground water is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B based on the timer II of step S20, as shown in FIG. As a result, the upper press board 10A and the lower press board 10B are cooled to around room temperature and held for a predetermined time (for example, 10 to 120 minutes for oil palm) depending on the material. At this time, the compression force of the upper press disk 10A with respect to the lower press disk 10B on the fixed side is maintained at a predetermined pressure (for example, 20 to 50 kg / cm ² ) that is the same as the pressure at the time of heat compression. The board 10A and the lower press board 10B are cooled.
Finally, as shown in FIG. 6 (f), the pressure releasing process is started in step S 21, the upper press platen 10 A is raised with respect to the fixed-side lower press platen 10 B, and the internal space IS and the positioning hole 18 are used. By taking out the finished oil palm molded body EO, a series of processing steps is completed.

The compacted material manufacturing apparatus MC for manufacturing the oil palm molded body EO of the present embodiment will be described in more detail.
The press machine 10 is mainly provided with a press machine 10 in which the internal space IS and the positioning hole 18 are formed by a structure divided into two parts, that is, an upper press machine 10A and a lower press machine 10B. The movement restriction of the outer periphery of the multilayer material NW can be the frame body 20. The frame 20 as the movement restriction of the outer periphery of the pre-pressurized multilayer material NW is determined as a structure that can move up and down or a fixed structure depending on the dimensions of the upper press panel 10A.

The frame body 20 shown in FIG. 7 is a modification of the first embodiment and has a vertically movable structure. The frame body 20 is disposed on the lower press panel 10B of FIGS. 5 and 6 and is positioned. It replaces the hole 18.
In FIG. 7, an outer lower press disk 10Ba and an inner lower press disk 10Bb having the same height are disposed on the base plate 25 of the lower press disk 10B, and a frame groove 21 is formed therebetween. A plurality of coil springs 22 are disposed on the base plate 25 side of the frame body groove 21, and a square movable frame 23 is disposed above the coil springs 22. A cutout is formed on the inner surface of the movable frame 23 to form a fluid path 24 that guides fluid such as water vapor from the side surface of the pre-pressurized multilayer material NW. The inner periphery of the square movable frame 23 is substantially equal to the outer periphery of the multilayer material NW before pressurization. When the multilayer material NW before pressurization enters the square movable frame 23, the lauan thin plate L1 and the thin oil palm material W2, ..., no positional deviation occurs in W5. Therefore, when the upper press board 10A is lowered, even if it has a width larger than the size of the lower press board 10B, when the upper press board 10A comes into contact with the movable frame 23, the movable frame 23 becomes elastic to the plurality of coil springs 22. It descends against it and responds to the compression of the multilayer material NW before pressurization. Then, the compression of the pre-pressurized multilayer material NW is completed at the movement limit of the plurality of coil springs 22. Of course, when the upper press board 10A is inserted into the movable frame 23 of the lower press board 10B, the movable frame 23 can be fixedly arranged on the lower press board 10B. That is, the movable frame 23 of the lower press panel 10B can be fixed and compressed by the upper press panel 10A inserted into the movable frame 23.

In this way, the thickness of the oil palm materials W1,..., W5 is heated and compressed by the external force applied in the direction perpendicular to the length direction of the fibers of the oil palm material W, and the whole is compressed and compressed. An oil palm molded body EO having a rate of 60% or more is manufactured. At this time, the elongation in the direction parallel to the plane of the oil palm material W is caused by the compressive force in the thickness direction of the oil palm materials W1,. It is restricted by the movable frame 23 and does not extend.
Therefore, the oil palm molded body EO is subjected to a die processing with a uniform compressive force.

In this embodiment, after controlling the vapor pressure, the pressure is gradually released to release the internal vapor pressure, and the water vapor pressure in the pre-pressurized multilayer material NW is lowered and fixed by cooling. When released, it is possible to form an oil palm molded body EO having no surface deformation called bulging deformation or puncture. That is, the oil palm molded body EO manufactured in the present embodiment does not cause bulging deformation or surface cracking after being released from compression, and stable quality is ensured. In the present embodiment, the upper palm 10A and the lower press 10B are compressed and fixed to obtain an oil palm molded body EO. However, when the present invention is carried out, a normal microwave oven is used. The oil palm molded body EO can be obtained even if the multilayer material NW before pressurization is heated and compressed by dielectric heating at a high frequency slightly lower than the frequency band of the microwave to be fixed.

In the oil palm material W to be laminated according to the present embodiment, the fiber directions such as the vascular bundle may be laminated in the same direction, or the fiber directions may be laminated so as to be orthogonal to each other.
When laminated with the same fiber direction, the wood fibers softened in the consolidation process are easily entangled with the other wood surface layer fibers of the same fiber direction adjacent to the lamination direction (longitudinal direction), The wood fixed in the intertwined state is firmly joined. Moreover, since the expansion rate and contraction rate at the joint surface can be made completely equal, no stress is applied to the joint surface even if the ambient environment conditions change. In particular, when the fiber directions of the vascular bundle and the like are laminated with the same direction, when compressive force is applied thereto, the oil palm material W becomes the fiber direction of the original oil palm trunk WD, and the oil palm material W is different. However, since the vascular bundle enters the parenchyma between the vascular bundles of the partner oil palm material W and is fixed there, it can be integrated in a natural joined state.
Accordingly, the bonding strength is high and the mechanical strength is high, and a stable dimensional shape after consolidation is ensured.

On the other hand, when laminated with the fiber directions orthogonal to each other, even if expansion and contraction force occurs due to changes in the surrounding environmental conditions after consolidation, the woods interact with each other to prevent warping deformation in a specific direction Is done.
In particular, when the total number of sheets is an odd number, when laminated with the fiber directions orthogonal to each other, the fiber direction of the single plate is parallel and the cross section is symmetric on the front and back, so distortion due to changes in ambient environmental conditions is prevented. The In addition, when the total number of sheets is an even number of four or more, the fiber directions on the front and back sides are laminated by laminating the fiber directions at the same part in the inside and laminating the other with the fiber directions orthogonal to each other. It is also possible to prevent distortion and the like due to changes in the ambient environmental conditions.
At this time, since the vascular bundles of the oil palm materials W are in a cross state, it is desirable that the vascular bundles of each other be in a state of being involved. Cellulose, hemicellulose, and lignin are hydrogen-bonded by compaction under this entrainment condition, and especially the oil palm trunk contains a lot of sugars, lignin, plastic components, etc., so these components are decomposed and softened. Then, it oozes out around the vascular bundle and is then recrystallized and recombined to function as a binder and to be integrated.

Moreover, it is the surface cut | disconnected in parallel with respect to the fiber of the oil palm material W to laminate | stack, and it is the surface cut | disconnected in parallel with the bark side surfaces, or the bark side surfaces, and is laminated | stacked. preferable. That is, when the oil palm material W is divided at a linear position passing through the tree core of the oil palm trunk WD and arranged to face each other, the mutual tree heart side surfaces or the mutual bark side surfaces face each other. By joining, warp deformation in a specific direction due to the difference in cell density between the tree heart side and the bark side can be prevented.

Furthermore, among the dried oil palm molded body EO, it is preferable to arrange and laminate materials having a small air-dry specific gravity after drying on the front and back. As a result, wood having a small air-drying specific gravity after drying is disposed on the front and back layers in contact with the upper press platen 10A and the lower press platen 10B, and compaction processing is performed. Therefore, the air-drying specific gravity after drying is small. The wood is sufficiently heated and compressed by the upper press board 10A and the lower press board 10B to reduce the difference in specific gravity between the woods, and the difference in the rate of dimensional change after production. Therefore, the stability of the dimensional shape after commercialization increases.

In the compression step of step S17, the upper press board 10A is subjected to a predetermined pressure (for example, 0.5 to 3 kg / second) with respect to the plurality of laminated pre-pressing multilayer materials NW placed on the lower press board 10B on the fixed side. cm ² ) and brought into contact with the upper surface of the laminated pre-pressing multilayer material NW, that is, a plane perpendicular to the fiber length direction. Then, at the beginning of the compacting process, first, heating in the heating process (step 16) is started, and the valve V1, the valve V2, and the valve V3 (FIG. 2) are opened, and the piping 15 of the upper press panel 10A from the boiler device (not shown). And the water vapor for heating is passed through the pipe line 16 of the lower press panel 10B, the interior space IS and the positioning hole 18 are maintained at a predetermined heating temperature, and the laminated multilayer material NW before pressurization is heated.

Here, it is preferable that the heating temperature in the heating process in the initial stage of compression is in the range of 110 to 160 ° C. If the heating temperature is too low, sufficient compacting will not be achieved, resulting in insufficient strength, poor bonding between wood, and dimensional shape deformation due to hygroscopic drying after product production, while the heating temperature is too high. The surface may be carbonized to change to black and the color tone or scent peculiar to wood may be impaired, or the material may deteriorate and the strength may be lowered and become brittle. According to the experiments by the present inventors, it has been found that an appropriate temperature condition is in the range of 110 to 160 ° C. By using this temperature condition, it is possible to prevent improper fixing in the compacting process, and material deterioration such as surface carbonization and lowering of material strength. More preferably, the heating temperature in the heating step in the initial stage of compression is in the range of 120 to 140 ° C. The specific set temperature is set according to the moisture content of the oil palm material W and the like.

In the hot compression process of step S17, the compression pressure of the upper press board 10A is set to a predetermined pressure with respect to the lower press board 10B on the fixed side, and the pre-pressing multilayer material NW becomes the upper press board 10A and lower press board 10B. And heated and compressed for a predetermined time. At this time, as shown in FIG. 6C, when the peripheral portion 10a of the upper press panel 10A comes into contact with the peripheral portion 10b of the lower press panel 10B, the seal member 11 disposed on the peripheral portion 10a of the upper press panel 10A. As a result, the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are sealed.
Thus, by heating and compressing by surface contact of the press panel, in particular, by applying pressure after heating to the heating temperature, even when warp deformation during drying occurs in the multilayer material NW before pressurization, Flattening can be achieved without causing cracks, cracks, etc., and heat compression can be performed efficiently. Furthermore, while the multilayer material NW before pressurization is heated and compressed and the internal space IS and the positioning hole 18 are kept in a sealed state, the water vapor originally contained in the multilayer material NW before pressurization becomes the vapor pressure. Thus, the dried wood DW can be freely diffused and discharged through the internal space IS and the positioning hole 18, so that the entire thickness is efficiently and uniformly heated and compressed.

Here, the predetermined pressure for compressing the multilayer material NW before pressurization is preferably in the range of 1 to 100 kg / cm ² . If the pressure is too low, immobilization will be poor in the compacting process, while if the pressure is too high, cracks may occur on the surface. According to the inventors' experiments, suitable pressure conditions are in the range of 1-100 kg / cm ² . By adopting this pressurizing condition, it is possible to prevent immobilization defects and occurrence of cracks in consolidation. More preferably, it is in the range of 10 to 50 kg / cm ² .
In addition, when the compression speed at this time is high, water vapor and air in the multilayer material NW before pressurization are difficult to escape, and the pressure acting on the multilayer material NW before pressurization increases, so that cracks occur, There is a risk of internal cracking due to insufficient softening. On the other hand, when the compression speed is low, the load on the surface in contact with the upper press board 10A and the lower press board 10B is increased, and cracks or the like may occur. Therefore, it is desirable that the compression pressure at this time be gradually increased according to the temperature transmission state inside the pre-pressurized multilayer material NW.

Furthermore, according to the experiments by the present inventors, it is preferable that the time for heating and compressing is within a range of 10 to 40 minutes. This time condition can prevent subsequent immobilization due to the treatment time being too short and carbonization of the surface due to the treatment time being too long. More preferably, the predetermined compression time is in the range of 20 to 30 minutes. In addition, it is preferable to set also the time of this heat compression considering the transmission state (time) of the temperature inside the multilayer material NW before pressurization.

Note that the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B of the press board 10 are hermetically sealed via the seal member 11, and the vertical direction of the internal space IS and the positioning hole 18 is as follows. The dimension interval is set to the finished dimension in the thickness direction when the plurality of laminated multi-layered pre-pressurized materials NW are compacted to form an oil palm molded body EO having an air-dry specific gravity of 0.8 or more. For this reason, the compression ratio of the entire thickness of the laminated multilayer material NW before pressurization, that is, the change in thickness due to the compression of the plurality of laminated multilayer materials NW before pressurization is determined by the peripheral portion 10a of the upper press panel 10A. This is determined by contacting the peripheral edge portion 10b of the lower press panel 10B.

Next, the predetermined compression pressure (preferably within the range of 1 to 100 kg / cm ² ) by the upper press board 10A and the lower press board 10B is maintained in the sealed state of the internal space IS and the positioning hole 18 shown in FIG. 6 (c). As it is, the temperature is raised to a specific heating temperature by the piping 15 of the upper press panel 10A and the piping 16 of the lower pressing panel 10B, and the internal space IS and the positioning hole 18 are maintained at the predetermined heating temperature for a predetermined time. The At this time, a high-temperature and high-pressure vapor pressure is generated between the surrounding surface of the pre-pressurized multilayer material NW and the inside thereof through the internal space IS and the positioning hole 18 which are sealed by the upper press platen 11 and the lower press platen 21. You can go in and out.
When the heat compression process is performed in a sealed state of the internal space IS and the positioning hole 18, the vapor pressure control process detects the vapor pressure of the internal space IS and the positioning hole 18 with the pressure gauge P2. As shown in (d), the vapor pressure of the second heating temperature is supplied to the internal space IS through the pipe 12 and the pipe port 12a connected to the valve V4, or the valve V5 is appropriately opened and closed. Then, high-temperature and high-pressure water vapor is discharged from the internal space IS to the drain pipe 14 side through the pipe port 13a and the pipe 13, whereby the vapor pressure of the internal space IS and the positioning hole 18 is controlled to a predetermined value.

In this way, by controlling the vapor pressure of the internal space IS and the positioning hole 18, a plurality of laminated oil palm materials W are heated and compressed. That is, by making the peripheral surface of the oil palm material W laminated and the inside thereof the same temperature, pressure, and vapor pressure state as the internal space IS and the positioning hole 18, the entire multilayer material NW before pressurization is made uniform, There is no processing strain, and shrinkage and expansion due to a change in the restoring force after molding and the surrounding environmental conditions are remarkably suppressed. In particular, by controlling the vapor pressure by discharging or introducing water vapor while maintaining a predetermined pressure state, the surface is prevented from being carbonized, uniformly heated and compressed, and further, the surface is prevented from drying. Smooth fixation is achieved, and recovery, return, deformation, etc. after molding are suppressed.

Here, it is preferable that the final heating temperature for maintaining the heating and compression state for compaction is in the range of 120 to 210 ° C. If the heating temperature is too low, the immobilization becomes sweet and chemical changes due to the action of water vapor cannot be caused sufficiently, resulting in improper immobilization, which tends to occur due to moisture absorption or deformation due to drying, while the heating temperature is high. If it is too much, the surface may be carbonized to change to black, and the color tone or scent peculiar to wood may be impaired, or the material may deteriorate and the strength may be lowered and become brittle. According to our experiments, suitable temperature conditions are in the range of 120-210 ° C. By setting this temperature condition, it is possible to prevent immobilization failure in the compacting process, maintain dimensional shape stability, and prevent material deterioration such as surface carbonization and material strength reduction. More preferably, the heating temperature is in the range of 120 to 140 ° C.

Further, according to the experimental study by the present inventors, the compression time immediately before immobilization is preferably within the range of 10 to 120 minutes. By this time condition, it is possible to prevent immobilization failure due to the treatment time being too short and carbonization of the surface due to the treatment time being too long. More preferably, the predetermined time is in the range of 30 to 90 minutes. The specific set time for performing the heating / compression process immediately before the immobilization is set in consideration of the moisture content of the multilayer material NW before pressurization.

Incidentally, the start of the vapor pressure control in the internal space IS and the positioning hole 18 in the sealed state due to the introduction or discharge of water vapor is performed after the temperature of the upper press panel 10A and the lower press panel 10B reaches a specific heating temperature. It is desirable to be done. If it does in this way, water vapor can osmose | permeate in the multilayer material NW before pressurization, and, thereby, the chemical change of the oil palm material W can fully be caused, As a result, the oil palm material W is fully and uniformly fixed. Therefore, there is little return due to moisture absorption, deformation due to drying, and the like. That is, when the introduction of water vapor in the closed internal space IS and the positioning hole 18 is started before the temperatures of the upper press board 10A and the lower press board 10B reach a specific heating temperature, the water vapor is condensed. The interior space IS and the positioning hole 18 in the sealed state are filled with water, and the moisture content of the wood increases, and as a result, return due to moisture absorption, deformation due to drying, and the like are likely to occur. Further, even when the discharge of water vapor in the internal space IS and the positioning hole 18 in the sealed state is started before the temperatures of the upper press board 10A and the lower press board 10B reach the second heating temperature, the water content of the outer layer portion is also increased. The excess internal space IS based on the rate and the moisture in the positioning hole 18 are difficult to be removed, and the moisture content of the wood increases, so that return due to moisture absorption, deformation due to drying, and the like easily occur.
In addition, it is preferable to end the vapor pressure control before starting the cooling described later. If the vapor pressure control is not finished before starting the cooling described later, the cooling processing efficiency is lowered.

Further, when steam is introduced into the internal space IS and the positioning hole 18 in a sealed state to control the vapor pressure, the temperature of the upper press panel 10A and the lower press panel 10B reaches a specific heating temperature. It is preferable to introduce a water vapor pressure and temperature equal to or lower than the water vapor pressure and temperature in the internal space IS and the positioning hole 18. When the pressure and temperature of the introduced water vapor are higher than the water pressure and temperature in the internal space IS and the positioning hole 18, the water is condensed and the internal space IS and the positioning hole 18 in a sealed state are filled with water. As a result, the moisture content of the oil palm material W increases, and as a result, return due to moisture absorption, deformation due to drying, and the like easily occur. In addition, in the internal space IS and the positioning hole 18 in a sealed state, when excess moisture based on the moisture content of the outer layer portion of the multilayer material NW before pressurization exists, the high temperature in the internal space IS and the positioning hole 18 By appropriately discharging high-pressure water vapor, the pressure is adjusted to a predetermined vapor pressure.

Subsequently, the immobilization process in step S19 is performed while maintaining the same predetermined pressure (preferably within the range of 1 to 100 kg / cm ² ) as the pressure in the heating process in step S16 and the compression process in step S17. V11, valve V12, and valve V13 (FIG. 5) are opened, and normal temperature cooling water is passed from a boiler device (not shown) through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B. As shown in (e), the upper press board 10A and the lower press board 10B are cooled to around room temperature and held for a predetermined time (eg, 10 to 120 minutes).
Finally, the pressure is released in the fixing step of step S19, and as shown in FIG. 6 (f), the upper press disk 10A is gradually raised and separated from the fixed-side lower press disk 10B. A series of processing steps are completed by releasing the pressure and the sealed state and taking out the finished oil palm molded body EO from the internal space IS and the positioning hole 18.

In this way, fixing in a consolidated state is stabilized by cooling under a pressure state in which deformation does not occur. And after cooling in a pressurized state, by releasing the pressurization, that is, by lowering the water vapor pressure in the multilayer material NW before pressurization by cooling, gradually releasing the pressure to release the internal vapor pressure In addition, the oil palm molded body EO can be liquefied and removed, and there is no bulging deformation, cracking, puncture or the like when the cooling and compression are released. That is, according to the oil palm molded body EO of the present embodiment, stable quality is ensured without causing bulging deformation, cracking, destruction, and the like after compression release.

In this way, the entire thickness of the laminated multilayer material NW before pressurization is heated and compressed by an external force applied in a direction perpendicular to the length direction of the fibers of the laminated multilayer material NW before pressurization. In the present embodiment, an oil palm molded body EO having a dry specific gravity of 0.8 or higher and a specific gravity of 1.2 or higher is usually manufactured. And the oil palm molded object EO obtained by doing in this way has oil palm material W joined firmly by the compaction process. This is because cellulose, hemicellulose, and lignin are hydrogen-bonded by compaction processing, and especially the palm of an oil palm contains many sugars, lignin, plastic components, etc., and these components are decomposed and softened by compaction processing. The oil palm material W functions as a binder by being recrystallized and recombined after moving between the oil palm materials W, and further, the fibers of the surface layer of the oil palm material W are softened by the consolidation process, and the lamination direction It is considered that the timbers are firmly joined together by being intertwined with the fibers of the wood adjacent to the wood.

As described above, according to the oil palm molded body EO of the present embodiment, wood is joined without using an artificial adhesive or environmental adhesive due to formaldehyde or the like, or a natural adhesive having a high cost. It is environmentally friendly and can reduce costs.
In addition, when the oil palm material W is joined by using an adhesive, it is common to apply the adhesive and then to press the adhesive to cure the adhesive. While the tightening process is necessary, according to the oil palm molded body EO of the present embodiment, the woods are joined together without using an adhesive by compaction processing, so that the separate joining process is unnecessary. Yes, the manufacturing process can be simplified.

The oil palm molding EO obtained in this way is compacted to reduce the gap in the oil palm material W, and the lignin, hemicellulose, etc. constituting the cell wall are softened, decomposed and recombined. -It is recrystallized, the cell density is increased, the disadvantage of the oil palm material W, which is low in specific gravity and low in strength and easily deformed, is complemented, and high strength and stable dimensional shape are ensured. In particular, the entire thickness of the laminated oil palm material W is uniformly compressed by carrying out the consolidation process so that the air-dry specific gravity is 0.8 or more, the properties of the oil palm material W are changed, and the hardness and the like are remarkable. In addition, there is less variation in physical properties and characteristic values such as hardness, and there is also little variation in expansion rate and drying rate due to changes in ambient environmental conditions, so that deformation and the like can be suppressed, thereby improving dimensional shape stability. Increase. Therefore, the physical properties are stable, the quality between products is small, and the commercial value is high. Furthermore, it is consolidated in a state where a plurality of dried oil palm materials W are stacked, and the expansion rate and contraction rate due to changes in ambient environmental conditions are substantially uniform on the bonding surface, so that stable bonding is maintained. In addition, a stable dimensional shape is ensured without causing distortion, deformation, cracks, and the like due to stress applied to the joint surface due to changes in ambient environmental conditions.

In particular, in the case of laminating with the same fiber direction of the oil palm material W, the fibers of the surface layer softened in the consolidation process are entangled with the fibers of the oil palm material W adjacent in the longitudinal direction with the same fiber direction. It is easy and the oil palm material W fixed in the entangled state is firmly joined. In addition, since the expansion rate and contraction rate at the joint surface can be made completely equal, no stress is applied to the joint surface when the ambient environmental conditions change. Therefore, the bonding strength is high, the mechanical strength is also high, and high dimensional shape stability is ensured.
On the other hand, when the multilayered material NW before pressurization is laminated with the fiber directions orthogonal to each other, even if expansion and contraction force is generated due to changes in the surrounding environmental conditions after the consolidation process, the mutual woods interact with each other and specify Directional warpage deformation is prevented. In particular, when the total number of sheets is an odd number, when laminated with the fiber directions orthogonal to each other, the fiber direction of the single plate is parallel and the cross section is symmetric on the front and back, preventing distortion due to changes in ambient environmental conditions, etc. Is done. At this time, a tough joining state can be obtained by increasing the compressive force with the same fiber direction in consolidation.
If the total number of sheets is an even number, the same fiber direction is laminated in a part of the inside, and the others are laminated with the fiber directions orthogonal to each other, so that the front and back fiber directions are aligned and the ambient environmental conditions It is possible to prevent distortion and the like due to the change of.

And the oil palm molding EO of this Embodiment is the outer surface even if it does not use the natural adhesive agent which the oil palm material W is densified by the compaction process on the front and back surfaces made into the compression surface, and the oil palm material W is expensive. The surface quality is good. That is, peeling from the fiber surface can be suppressed without using an artificial adhesive or a high-cost natural adhesive, which is environmentally friendly and can reduce costs.
Furthermore, since the entire thickness is compacted, even if a large chamfering process or curved surface process is applied to the ridgeline on the thickness side surface, high hardness is ensured on the end surface.

Incidentally, even in the case of using an oil palm material W in the vicinity of a soft tree core having a high water content particularly in oil palm, the strength can be increased by compaction processing, or temperature and compression control are performed in compaction processing. In this way, excess water can be discharged, and the water vapor pressure inside the multilayer material NW before pressurization is uniformly and suitably adjusted, so that bulge deformation after compression processing and the like are also suppressed. Therefore, it is possible to form the oil palm molded body EO having sufficient strength and stable dimensional shape. Therefore, effective utilization of the entire trunk of oil palm can be achieved.
In particular, when the oil palm material W is dried and disposed on the front and back surfaces having a small air-dry specific gravity, the front and back layers contacting the upper press panel 10A and the lower press panel 10B as described above. Since a material having a small air-dry specific gravity after drying is disposed and compaction processing is performed, sufficient heat compression is performed by the upper press panel 10A and the lower press panel 10B in the material having a small air-dry specific gravity after drying. Thus, the difference in specific gravity between the woods is reduced, and the difference in the dimensional change rate after commercialization is also reduced. Therefore, the stability of the dimensional shape after commercialization increases.

As described above, the oil palm molded body EO according to the present embodiment is formed by peeling a trunk of a soft oil palm having a high moisture content as an oil palm material W, and then drying and further stacking and compacting a plurality of sheets. In addition to the surface, the strength and hardness of the entire plate thickness are greatly improved, and a wide range of applications such as flooring materials, waistboard materials, indoor furniture materials, and housing exterior materials used by surface coating are expected. In particular, since the surface hardness is increased by compaction processing and sufficient strength and hardness can be ensured even if the thickness is small, the thickness can be reduced in commercialization.

[Embodiment 2]
The oil palm molded body EO shown in FIG. 4 is formed by compressing the upper mold and the lower mold of the mold directly from the multilayer material NW before pressurization. This can also be molded.
That is, as shown in FIG. 9, first, the pre-pressing multilayer material NW of FIG. 9A is subjected to 50% consolidation of FIG. 9B to obtain a plate-like preliminary oil palm molded body HW, This is formed by compressing the upper mold and the lower mold with a predetermined mold, and molding the oil palm molded body EO of FIG. 9C.
The manufacturing method of the oil palm molding is demonstrated using the flowchart of FIG.10 and FIG.11.

The manufacturing method of the oil palm molded body EO which carries out the main shaping | molding by the 2nd time what was preformed at the 1st time is demonstrated.
As in the first embodiment, first, while rotating the oil palm trunk WD having a predetermined length in the circumferential direction in step S30, the rotary palm blade CT is peeled to a predetermined thickness to form a plurality of oil palm members W. In the thin plate process to be formed, the oil palm material W having a thickness in the range of 3 mm to 20 mm is peeled from the oil palm trunk WD, and then dried in the range of 5% to 30% in the moisture content in the drying process in step S31. The dried oil palm material W is obtained. Here, an upper press board 10A made of a mold formed on a flat surface of the compacted material manufacturing apparatus MC and a lower press board 10B made of a mold formed on a flat surface are used.

A plurality of oil palm materials W dried in the drying step of step S31 are stacked in a predetermined state in step S32 using the compacted material manufacturing apparatus MC. The multi-layer material NW before pressurization in the pre-molding is obtained by the stacking process of step S32. The multi-layered material NW before pressurization has the same outer shape, but the oil palm materials W in the stacking direction are merely overlapped by their own weight. The upper press board 10A is lowered at a predetermined pressure with respect to the pre-pressing multilayer material NW placed on the positioning hole 18 of the lower press board 10B on the fixed side. In the embodiment, the oil palm materials W1,... Then, in step S33, the timer I is viewed under the timer control by the timer I, and it is determined whether it is the heating timing in step S34, and it is determined whether it is the compression timing in step S35.
At the heating timing, water vapor of a predetermined temperature (for example, 110 to 150 ° C.) is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B in step S36, and the interior space IS and the positioning hole 18 Is maintained at a predetermined temperature (for example, 110 to 150 ° C.). If it is determined in step S34 that it is not the heating timing, it is determined in step S35 whether it is the compression timing. If it is the compression timing, a compression process of 50% compression is entered in step S37. The pre-compression process in step S37 has a compression rate of 50%. However, when the present invention is carried out, the compression rate may be in the range of 20 to 80% in the first pre-molding.

That is, in step S37, the compression force of the upper press board 10A is set to a predetermined pressure (for example, 20 to 30 kg / cm ² ) with respect to the lower press board 10B on the fixed side, and the multilayer material NW before press is used as the upper press machine. 10A and the lower press panel 10B are heated and compressed for a predetermined time (for example, 5 to 20 minutes). Also, in step S38, it is determined whether the heating / compression is completed, and the routine processing from step S33 to step S38 is performed until the end time is reached.
In order to prevent cracking, the compression rate in step S37 is determined based on the temperature rise of the multilayer material NW before pressurization, that is, the internal temperature state of the multilayer material NW before pressurization according to the elapsed time of the timer I in step S38, heating It is desirable to gradually increase with the passage of time, and it is preferable to set the heating and compression time in consideration of the heating time.

Further, while the internal space IS and the positioning hole 18 are hermetically sealed, the compression force by the upper press board 10A and the lower press board 10B is maintained, and the temperature rises to a predetermined temperature (eg, 140 to 160 ° C.) based on the timer I reference in step S33. Is done.
If it is determined in step S38 that the preliminary heating process in step S36 based on the operation of the timer I in step S33 and the preliminary compression process in step S37 are completed, the preliminary fixing process is entered in step S39. In the preliminary immobilization process, normal temperature cooling water or ground water is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B on the basis of the timer II in step S40. The lower press panel 10B is cooled to around normal temperature and held for a predetermined time (for example, 10 to 60 minutes for oil palm) depending on the material. At this time, the compression force of the upper press disk 10A with respect to the lower press disk 10B on the fixed side is maintained at a predetermined pressure (for example, 20 to 50 kg / cm ² ) that is the same as the pressure at the time of heat compression. The board 10A and the lower press board 10B are cooled.
Finally, the pressure releasing process is entered in step S41, the upper press board 10A is raised with respect to the lower press board 10B on the fixed side, and the oil palm molded body EO which is a finished product from the internal space IS and the positioning hole 18 is obtained. By taking out, a series of preliminary molding is completed, and a compacted preliminary oil palm molded body HW is obtained which is compressed into a plate shape at a compression rate of about 50% and consolidated.

In order to manufacture the oil palm molded body EO of the present embodiment, the same processing steps are further performed on the preliminary oil palm molded body HW.
First, the mold of the compacted material manufacturing apparatus MC is composed of an upper press 10A composed of a mold for forming the flat part EP and the convex part EQ on the flat part EP, and a mold for forming the concave part ER on the flat part EP and above. The lower press panel 10B is assumed. A preliminary oil palm molded body HW is set in the positioning hole 18 of the compacted material manufacturing apparatus MC. In this first molding, the preforms have the same outer shape, and the oil palm materials W in the stacking direction are joined to each other. The upper press board 10A is lowered at a predetermined pressure with respect to the preliminary oil palm molded body HW placed on the positioning hole 18 of the fixed lower press board 10B, and the upper surface of the preliminary oil palm molded body HW, ie, the main In the embodiment, the oil palm materials W1,... Then, in step S42, the timer III is viewed under the timer control by the timer III, and it is determined whether it is the heating timing in step S43, and it is determined whether it is the compression timing in step S44.
At the heating timing, steam at a predetermined temperature (for example, 110 to 170 [° C.]) is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B in step S45, and the internal space IS and the positioning holes 18 is maintained at a predetermined temperature (for example, 110 to 170 [° C.]). When it is determined at step S43 that it is not the heating timing, it is determined at step S44 whether it is the compression timing, and when it is the compression timing, the main compression process is entered at step S46.

That is, in step S46, the compression force of the upper press board 10A is set to a predetermined pressure (for example, 20 to 30 kg / cm ² ) with respect to the lower press board 10B on the fixed side, and the preliminary oil palm molded body HW becomes the upper press board. 10A and the lower press panel 10B are heated and compressed for a predetermined time (for example, 5 to 20 [min]). In step S47, it is determined whether or not the main heating / compression is completed, and the routine processing from step S42 to step S47 is performed until the end time is reached.
In order to prevent cracking, the compression force in step S46 is the temperature rise of the preliminary oil palm molded body HW, that is, the temperature state inside the preliminary oil palm molded body HW according to the elapsed time of the timer I in step S42, heating It is desirable to gradually increase with the passage of time, and it is preferable to set the heating and compression time in consideration of the heating time.

Further, with the internal space IS and the positioning hole 18 sealed, the compression force from the upper press board 10A and the lower press board 10B is maintained, and the temperature reaches a predetermined temperature (eg, 140 to 160 ° C.) based on the timer III in step S42. Be raised.
If it is determined in step S47 that the main heating process in step S45 based on the operation of the timer III in step S42 and the main compression process in step S46 have been completed, the main fixing process is entered in step S48. In this immobilization process, normal temperature cooling water or ground water is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B on the basis of the timer IV in step S49. The lower press panel 10B is cooled to around room temperature and held for a predetermined time (for example, 10 to 60 minutes for oil palm) depending on the material. At this time, the compression force of the upper press disk 10A with respect to the lower press disk 10B on the fixed side is maintained at a predetermined pressure (for example, 20 to 50 kg / cm ² ) that is the same as the pressure at the time of heat compression. The board 10A and the lower press board 10B are cooled.
Finally, the pressure releasing process is entered in step S50, and the upper press disk 10A is raised relative to the fixed-side lower press disk 10B, and the finished oil palm molded body EO from the internal space IS and the positioning hole 18 is obtained. The series of main molding is taken out and a compacted oil palm molded body EO is obtained.

In the embodiment shown in FIG. 9C, the oil palm molded body EO of this embodiment is an oil palm molded body EO having a temperature and a compressive force immediately before entering the original fixation of the temperature and the compressive force. It is. At this time, the unevenness | corrugation formed with the metal mold | die may form not the same thickness even if the plane part EP of the oil palm molded object EO, the recessed part EQ, and the convex part ER are formed with the same thickness. For this purpose, the temperature and compressive force have been described on the premise that compaction of about 50% is performed as the temperature and compressive force immediately before entering the original immobilization. It is only necessary to obtain a preliminary oil palm molded body HW having about 20 to 80% and to perform the main molding.

[Deployment of the embodiment]
Further, as shown in another embodiment (case 1) of FIG. 12 (a), a plate-like preliminary oil palm molded body HW is formed, and then the preliminary oil palm molded body HW is subjected to consolidation processing for lifting. The leg JW shown in FIG. 12B is integrally joined with the compacted material manufacturing apparatus MC to form an oil palm molded body EO as shown in FIG. 12C. At this time, if the preliminary oil palm molded body HW and the leg JW are joined so that the joining surfaces thereof are in the same fiber length direction, the joining strength can be increased.
Also in this embodiment, when forming the preliminary oil palm molded body HW, the compression rate may be about 20 to 80%, or it is fixed at the compression rate in the state of the specific oil palm molded body EO, and only the leg JW is used. May be joined at a compression rate of about 20 to 80%. Of course, the opposite may be possible.

As shown in another embodiment (case 2) of FIG. 13A, the plate-like preliminary oil palm molded body HW is compressed into the flat part EP, the concave part EQ, and the convex part ER with the compression ratio as the oil palm molded body EO. The leg JW shown in FIG. 13 (b) for lifting the preliminary oil palm molded body HW is integrally joined with the compacted material manufacturing apparatus MC, as shown in FIG. 13 (c). It is. At this time, if the preliminary oil palm molded body HW and the leg JW are joined so that the joining surfaces thereof are in the same fiber length direction, the joining strength can be increased.
Also in this embodiment, when forming the preliminary oil palm molded body HW, the compression rate may be about 20 to 80%, or it is fixed at the compression rate in the state of the specific oil palm molded body EO, and only the leg JW is used. May be joined at a compression rate of about 20 to 80%. Of course, the opposite may be possible.

As shown in another embodiment of FIG. 14 (Case 3), a convex portion ER having a small compression rate is formed on a plate-shaped oil palm molded body EO. The flat part EP of the oil palm molded body EO is buffered by the convex part ER that is convex downward. In this embodiment, for the purpose of increasing the density of the convex portions ER, it is possible to provide a stable thickness and a stable life by applying a compression rate of about 0 to 20%.
As shown in another embodiment of FIG. 15 (Case 4), a flat oil palm molding EO is formed on the upper surface of a plate-shaped oil palm molding EO, and the preliminary oil palm molding is formed. The leg JW for lifting the HW is integrally joined by the compacted material manufacturing apparatus MC. At this time, if the preliminary oil palm molded body HW and the leg JW are joined so that the joining surfaces thereof are in the same fiber length direction, the joining strength can be increased.
Also in this embodiment, when forming the oil palm molded body EO, the compression ratio may be about 20 to 80% as the preliminary oil palm molded body HW, or the compression ratio in the state of the specific oil palm molded body EO It may be fixed and only the legs JW may be joined with a compression rate of about 20 to 80%. Of course, the opposite may be possible. The fine convex part ER on the upper surface functions as a slip stopper

As shown in another embodiment of FIG. 16 (Case 5), an oil palm molded body EO having a predetermined thickness integrally holds the oil palm materials W stacked in a plurality of layers only by the recess EQ. Locations other than the concave portion EQ may be subjected to consolidation processing, or the superposed state may be maintained. In this embodiment, the use is suitable for an attic of a house, a heat insulating material of a wall, and the like.
As shown in another embodiment (case 6) in FIG. 17, an oil palm molded body EO having a predetermined thickness integrally holds the oil palm material W stacked in a plurality of layers only by the recess EQ. Locations other than the concave portion EQ may be subjected to consolidation processing, or the superposed state may be maintained. In this embodiment, the use is suitable for an attic of a house, a heat insulating material of a wall, and the like.

The five oil palm materials W1,..., W5 in the present embodiment have a thickness of 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm. , 5.0 mm, 5.5 mm, and 6.0 mm are compressed from the pre-pressing multilayer material NW in which five oil palm materials W having the same thickness are arranged so that the fiber lengths intersect at right angles. Thus, a laminated plywood was produced in place of the oil palm molded body EO.
Basically, a compacting process with a compression ratio of 20 to 80% was performed on the thickness of the multilayer material NW before compression before compression. The temperature of the supplied steam is raised to 110 to 210 degrees, and the compression force applied during that time is 20 to 50 kg / cm ² . Here, by laminating five 1.5 mm oil palm materials W, a 7.5 mm pre-pressurized multilayer material NW is obtained, but when compressed at a predetermined compression rate at the laboratory level, Due to the expansion after decompression, it is several percent or less, but an error is present.

Also, as a precaution, the five oil palm materials W in the present embodiment have a thickness of 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm. , 5.0 mm, 5.5 mm, and 6.0 mm are compressed from the pre-pressing multilayer material NW in which five oil palm materials W of the same thickness are arranged so that the fiber lengths are parallel to each other. A laminated plywood corresponding to the oil palm molded body EO was produced.
Similar to the former, a laminated plywood was obtained in place of the oil palm molded body EO, which was subjected to consolidation processing with a compression rate of about 20 to 80% with respect to the thickness of the multilayer material NW before compression basically before compression. . The temperature of the supplied steam is raised to 110 to 210 ° C., and the compression force applied during that time is 20 to 50 kg / cm ² .

In Table 1, the pre-pressing multilayer material NW in which five oil palm materials W of the same thickness are arranged so that the fiber (vascular bundle) length intersects at right angles is indicated as “cross-bonded state”, and the fiber length is The parallel multi-layer material NW before pressurization was shown as “parallel joined state”. Table 1 shows the results of the endurance test. Placed in a place where sunlight is used for three months from April to June, and 30 minutes of water at 10 and 4 o'clock on sunny days under natural weather conditions. Sprayed for a minute. In the “cross-bonded state” 1.5 mm and 2.0 mm laminated plywood PW, the surface was partially not flush, and there was a possibility that bubbles were generated and peeled inside. That is, it has been found that the usage environment conditions are restricted. In this test, the response to a sudden change in natural temperature was examined. Here, it is proved that the “parallel joined state” is easier to bond with each other than the “cross joined state”, and a good strength can be obtained. However, since the fiber direction of the vascular bundle or the like is determined in a specific direction, the flatness as a plate is lacking, but conversely, a specific arc-shaped concrete frame is used as a material for winding and conveying the oil palm molded body EO. Etc. can also be used.

However, in other samples, since hemicellulose has a function of binding lignin and cellulose, it is unclear how much they interfere with each other in the naturally cultivated state of oil palm trunk WD. By raising the temperature to a predetermined temperature (120 ° C. or higher), for example, 80 ° C. or higher of the reaction start temperature of lignin, the reaction start temperature of hemicellulose is 60 ° C. or higher. It turned out to be a material.
In the laminated plywood PW as a 1.5 mm and 2.0 mm oil palm molded body EO in the “cross-joined state”, when a vascular bundle of 0.2 to 1.0 mm crosses, its unique vascular bundle crossing position Then, even if hemicellulose binds lignin and cellulose, the total amount of absolute hemicellulose, lignin, and cellulose obtained at a predetermined temperature and compressive force is small, and it is presumed that joining is not performed completely.

Moreover, the inventors performed the test showing the joint strength of Table 2 and Table 3 as severe use conditions. Although many samples were used, the samples submitted this time are extracted from the areas where remarkable features appear.
The laminated plywood A1 corresponding to the oil palm molded body EO is composed of four oil palm materials W of 3.0 mm of oil palm materials W1,..., W4, and the thickness of the oil palm material W is set to 3.0 mm. Is. The laminated plywood B is composed of four oil palm materials W, and the thickness of the oil palm material W is 3.0 mm + 2.5 mm + 2.5 mm + 3.0 mm. The laminated plywood C1 is made of three oil palm materials W, and the thickness of the oil palm material W is 2.5 mm + 3.0 mm + 2.5 mm. The laminated plywood D1 is composed of three 3.0 mm oil palm materials W, and the thickness of the oil palm material W is 3.0 mm + 3.0 mm + 3.0 mm.
The compression ratio of the multilayer material NW before pressurization and the laminated plywood PW was calculated by the formula {(thickness of the multilayer material NW before pressurization) − (thickness of the laminated plywood PW)} / thickness of the multilayer material NW before pressurization. .

Here, in the severe bonding strength test of applying 30 ° C. hot water and 60 ° C. hot water, the laminated plywood A1 and laminated plywood B1 did not change within 90 minutes even when applied to 30 ° C. hot water. However, when applied to hot water at 60 ° C., the laminated plywood B1 softened in 45 minutes, and the laminated plywood A1 softened in 60 minutes.
Moreover, in the laminated plywood C1, the laminated surface softened in 30 minutes even when it was immersed in hot water at 30 ° C. That is, this is not a problem of 60 ° C. or higher of the reaction start temperature of hemicellulose, but it can be estimated that the influence of compressive force is exerted. When the compressive force is increased, the air inside the laminated plywood C1 disappears and dense bonding is performed. However, if the compressive force is weak, only formal bonding is performed without crushing the fibers. It is estimated that the whole was softened. Naturally, the laminated surface of the laminated plywood C1 softened within 15 minutes even when it was immersed in hot water at 60 ° C.
And the laminated plywood D1 is joined to hot water at 30 ° C. for 45 minutes or less by increasing the thickness of the oil palm material W and increasing the compressive force, and 15 minutes even with hot water at 60 ° C. I endure below. Therefore, it is a necessary requirement to increase the compression force. From the viewpoint of the compression rate, a compression rate of 60% or more, more preferably 65% or more is desirable. In particular, when the compression rate is 70% or more, the safety is increased. When the compression rate is low, it is desirable to apply a water-repellent coating agent to the surface.

That is, experimentally, when the compressibility is 65% or more, the oil palm material W is a multilayer material NW before pressurization in which the fiber (vascular bundle) lengths intersect with each other at right angles, and Since the thickness of the oil palm material W has a boundary line at 2.5 mm, it is preferably 2.5 mm or more. In particular, there are no conditions in which the laminated plywood PW is immersed in hot water at 30 ° C. in nature. However, if the thickness of the oil palm material W is 2.5 mm and the compression rate is 65% or more, it can be used. Show.
The conditions under which the oil palm molded body EO is immersed in hot water at 60 ° C. are to confirm the possibility that hemicellulose inhibits the binding between lignin and cellulose, but the compression ratio is 65% or more. This means that it is also difficult to appear.
However, since it means that the boundary line of the compressibility is about 65%, in mass production, it is desirably 65% or more, and the thickness of the oil palm material W is also 3.0 mm or more. A thickness of 1 mm or more is desirable for the thickness after consolidation.

Further, the inventors made three experiments in which the oil palm material W is orthogonal, each having a thickness of 4 mm, and conducted experiments similar to those in Tables 2 and 3 on the laminated plywood E1, the laminated plywood F1, and the laminated plywood G1. I went there. It was confirmed that the compression ratio was 48.75%, which was 50%, and it was not immersed in hot water at 60 ° C. That is, as shown in Table 5, the compression rate of the laminated plywood E1 and the laminated plywood F1 may be 50% or more, and if the compression rate including the laminated plywood G1 is 40% or more, there is a practical problem. It was confirmed that it did not occur.

As described above, the laminated plywood corresponding to the oil palm molded body EO of the present embodiment is formed by peeling a predetermined length of the oil palm trunk WD to a predetermined thickness with a rotary race while rotating it in the circumferential direction. When one piece of oil palm material W having a thickness of 1 mm or more is compressed and fixed by a mold formed with one or more of a flat part, a concave part, and a convex part, and integrated. It is joined.

Therefore, since one or more of the oil palm materials W are compressed, fixed, and joined together, the oil palm joined with natural products using the resin component and sugar component contained in the oil palm material W A molded body EO is obtained. Therefore, even if it is assumed that the thermosetting resin is applied to the opposite surface of the oil palm material W in advance, it becomes a usage fee for the auxiliary adhesive, and the use of the formaldehyde adhesive that causes sick house syndrome is suppressed. An oil palm molded body EO using a component inherent to palm is obtained.

Since this oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness by a rotary race, a uniform oil palm material W is obtained. As a result, the oil palm material is obtained. The oil palm molded body EO made of W is homogeneous. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm trunk WD itself depending on the applied temperature and pressure, an arbitrary adhesive force can be obtained by controlling the applied temperature and pressure. And in the thing which joins the oil palm material W with the resin component and sugar component which oil palm trunk WD itself contains, and forms oil palm molding EO, other synthetic resin and synthetic rubber are used as an adhesive. Because it is not, it can be returned to nature and does not cause pollution problems.

Furthermore, the oil palm material W has almost no voids due to the compressive force when joined by the action of a resin component such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose. In addition, it is waterproof and insect-proof and has a long service life even when used as a building material.
In particular, hemicellulose has a function of binding lignin and cellulose, and it is unclear how much they interfere with each other when the oil palm trunk WD is naturally cultivated. However, it was confirmed that by raising the temperature to a predetermined temperature, for example, 80 ° C. or more of the reaction start temperature of lignin, the reaction start temperature of hemicellulose was 60 ° C. or more, and they reacted with each other to become firm characteristics.

The oil palm molded body of the above embodiment is formed by peeling a predetermined length of oil palm trunk WD from the outer periphery with a rotary race while rotating it in the circumferential direction, and the thickness of one piece obtained by compacting it. Two or more oil palm materials W of 1 mm or more are integrally joined.
Therefore, at least two oil palm materials W that have been compacted are arranged so as to face each other, and they are joined together. Therefore, when the resin component and sugar component contained in the oil palm material W are insufficient. The desired oil palm molded body EO is manufactured by adding and bonding an adhesive to the objects to be joined. Therefore, since the adhesive is used when the resin component and the sugar component contained in the oil palm material W are insufficient, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, An oil palm molded body EO using the components it has is obtained.

The oil palm molded body EO according to the above embodiment is a process of forming the oil palm material W by peeling the oil palm trunk WD having a predetermined length from the outer periphery to the predetermined thickness with the blade CT while rotating the oil palm trunk WD in the circumferential direction. It can be set as the thin plate process of step S10 and step S30. In addition, the process of drying the oil palm material W may be the same process as the process of forming the oil palm material W or may be a separate process, and this may be the drying process of step S11 and step S31. it can.
And the process of laminating the dried oil palm material W in a predetermined state as the multilayer material NW before pressurization is usually used by laminating in units of 2 to 5 sheets, but in principle Two or more layers may be stacked, and this can be set as the stacking step of Step S12 and Step S32.
In particular, by using less than the number of oil palm materials W, it is possible to suppress the use of a formaldehyde adhesive that causes sick house syndrome, at least as compared with conventional plywood.

Furthermore, in the process of heating to raise the temperature of the oil palm material W laminated after the lamination process of step S12 and step S32, the process of introducing water vapor or electric heat and heating it with a hot plate, Since it supplies, it can be set as the heating process of step S16, step S36, and step S45. Furthermore, the step of applying a compression force in the direction perpendicular to the surface of the oil palm material W to the laminated oil palm material W heated by the heating process of step S16, step S36, and step S45 is a predetermined compression. It is only necessary to compress the oil palm material W at a rate, that is, to compress the multilayer material NW before pressurization. This process can be a compression process of step S17, step S37, and step S46.
In addition, after compressing for a predetermined time in the compression step, the temperature supplied in the heating step is lowered, the compression state of the oil palm molded body EO is fixed, and the compression force compressed at a predetermined compression rate is applied. The pressure is released, and this can be captured from the oil palm molded body EO and used as the fixing step of Step S19, Step S39, and Step S48.

Thus, the manufacturing method of the oil palm molded body of the above-described embodiment is performed by rotating a predetermined length of the oil palm material W in the circumferential direction with a rotary race from the outer periphery to a predetermined thickness with a blade CT. The thin plate process of step S10 to be formed on the oil palm material W, the drying process of step S11 for drying the oil palm material W, and the step of laminating a plurality of oil palm materials W dried in the drying process in a predetermined state In the laminating step of S12, the heating step of S16 for heating to raise the temperature of the laminated oil palm material W after the laminating step, and the laminated oil palm material W heated by the heating step Applying a compressive force in a direction perpendicular to the surface of the oil palm material W while restricting extending in a direction parallel to the surface of the oil palm material W A step of compressing step S17 to compress a predetermined time, after pressing a predetermined time, the compression step is one comprising the step of immobilizing step S19 for immobilizing by lowering the temperature which has been supplied in the heating step.

Therefore, since the oil palm trunk WD used in these steps has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness with a rotary race, a homogeneous oil palm material W is obtained, As a result, the oil palm molded body EO made of the oil palm material W becomes homogeneous. In addition, since the bonding force can be changed by the action of resin components such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, depending on the applied temperature and compressive force, the control of the applied temperature and compressive force is possible. Arbitrary adhesive strength can be obtained. Since a plurality of oil palm materials W are joined by the action of resin components such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, an oil palm molded body EO is formed. Since synthetic resin and synthetic rubber are not used as adhesives, they can be returned to nature and cause no pollution problems. Furthermore, due to the compressive force when the oil palm trunk WD itself contains resin components such as lignin and the sugars such as cellulose and hemicellulose, the gap between the lauan thin plate L and the oil palm material W is almost eliminated, and the dense Since it becomes an organization, it is water-resistant, and is water-proof and insect-proof, and has a long service life even when used as a building material.

In the method for manufacturing the oil palm molded body of the above-described embodiment, a plurality of oil palm materials W are peeled off with a cutter CT from the outer periphery to a predetermined thickness with a rotary race while rotating the oil palm trunk WD of a predetermined length in the circumferential direction. A thin plate process comprising steps S10 and S32, a drying step comprising steps S11 and S31 for drying the oil palm material W formed in the thin plate process, and an oil palm material W dried in the drying step. A stacking process composed of steps S12 and S32 for stacking a plurality of sheets in a predetermined state, and a heating process composed of steps S16 and S36 for heating the laminated oil palm material W to increase the temperature after the stacking process; The surface of the oil palm material to the laminated oil palm material heated by the heating step A compression process comprising steps S17 and S37, in which a compression force in a direction perpendicular to the surface of the oil palm material is applied and compressed for a predetermined time while being restricted by the positioning hole 18 or the frame body 20 from extending in the parallel direction. And, the oil palm material W compressed for a predetermined time in the compression step is made to be a method comprising a fixing step consisting of steps S19 and S39 for fixing the oil palm material W by lowering the temperature supplied in the heating step. it can.

Positioning each side of the five oil palm members W1,..., W5 in the step S12 and step S32 of laminating the oil palm material W dried in the drying step of the above embodiment in a predetermined state. The frame body 20 or the positioning hole 18 is a frame body 20 or the positioning hole 18 that regulates a predetermined stacking surface, and regulates the top and bottom and the left and right of the surface of the plurality of thin plates W. Therefore, the thin plate W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, cracks due to fiber breakage and the like, and a thick portion and a thin portion are not generated depending on the position.

The oil palm molded body of the above embodiment regulates drying of a predetermined length of the oil palm material W, stacking of a plurality of sheets, and extending in the parallel direction along the surface of the heated oil palm material W. However, in the oil palm molded body EO formed by compressing by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material W, then maintaining the compression and lowering the temperature and fixing, The laminated oil palm materials W are stacked with their fiber directions intersecting each other to prevent the plurality of oil palm materials W from being bent in a direction perpendicular to the surface thereof.
Thus, since the oil palm material W is laminated with the fiber directions intersecting each other, it is compressed by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material W. Can be molded according to the shape of the mold to be compressed. Therefore, the plywood itself made of laminated oil palm material W can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and the components that oil palm inherently has An oil palm molded body EO that is environmentally friendly is obtained.

In addition, the oil palm molded body of the above-described embodiment is obtained by drying a predetermined length of the oil palm material W, laminating a plurality of sheets, heating and extending in a parallel direction along the surface of the laminated oil palm material W. An oil palm molded body EO that is compressed by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material W while regulating, and then maintaining the compression and lowering the temperature to fix it. In the above, a plurality of the laminated oil palm materials W are overlapped so that the plurality of oil palm materials W are curved only in a specific perpendicular direction to the surface.
In this way, the oil palm material W is laminated and laminated in consideration of the fiber direction, and compressed by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material W. It can be molded according to the shape of the mold. Further, when a plurality of oil palm materials W are overlapped, the plurality of oil palm materials W are stacked so that the fiber directions intersect only one or two or all the fiber directions are parallel to each other. Since it is curved only in a specific perpendicular direction to the surface, it can be formed into a desired curved shape. Therefore, the plywood itself made of laminated oil palm material W can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and the components that oil palm inherently has An oil palm molded body EO that is environmentally friendly is obtained.

The oil palm molded body of the above-described embodiment is obtained by forming one or more of the plane portion EP, the concave portion EQ, and the convex portion ER with a mold on the oil palm material W having the predetermined length. EO is obtained.
In the oil palm molded body of the above embodiment, the concave EQ or the convex ER formed in the oil palm material W having the predetermined length is formed to have the same thickness as that of the other flat portion EP. The thickness of the obtained oil palm material W is uniform, and the mechanical strength is also increased. In addition, the entire oil palm molded body EO is not overwhelmed.

In the oil palm molded body of the above embodiment, the front and back recesses EQ formed on a plurality of laminated oil palm materials W are compressed with a large compressive force, and the plurality of laminated oil palm materials W Since the recesses EQ are integrated at the positions of the recesses EQ, the front and back recesses EQ formed in the plurality of laminated oil palm materials W are fixed integrally therewith. Therefore, it is possible to perform the joining independent of the compression of the planar portion EP, and since it can be integrated only there, it is possible to use a buffering agent, a heat insulating material, and the like.

Further, in the method of manufacturing the oil palm molded body of the above embodiment, the oil palm trunk WD having a predetermined length is peeled off at a predetermined thickness by a rotary race in the circumferential direction in the thin plate process of step S10 and step S30. The oil palm material W formed in the palm material W and dried in the thin plate process of step S10 and step S30 in the drying process of step S11 and step S31 is dried, and in the stacking process of step S12 and step S32, the steps S11 and S31 are performed. A plurality of oil palm materials W dried in the drying step are laminated in a predetermined state. And in the heating process of step S16 and step S36, it heats so that the temperature of the oil palm material laminated | stacked by the lamination process of step S12 and step S32 may be raised, and the compression process of step S17 and step S37 performs step S16 and step S36. While restricting the laminated oil palm material W heated by the heating process from extending in a direction parallel to the surface of the oil palm material W, the upper mold (planar portion EP and upper On the surface of the oil palm material W with the upper press board 10A made of a mold that forms a convex part EQ on the lower die (the lower press board 10B made of a mold that forms a concave part ER on the flat part EP and the upper part). A compression force in a right angle direction is applied and compression molding is performed for a predetermined time. In the fixing step of Step S19 and Step S39, Step S17 and Step The laminated oil palm material W compressed for a predetermined time in the compression step of S37 is cooled and fixed by lowering the temperature supplied in the heating step of steps S16 and S36.

As described above, the plurality of oil palm materials W peeled to have a predetermined thickness can be formed in a necessary thickness in the stacking process of Step S12 and Step S32. Therefore, the thickness can be determined according to the intended use. In the heating process of Step S16 and Step S36 for heating to increase the temperature of the oil palm material W stacked in the stacking process of Step S12 and Step S32, particularly when a plurality of oil palm materials W are heated with water vapor, lignin Since resin components such as cellulose and sugars such as cellulose and hemicellulose soften and bond, a firm oil palm molded body EO is obtained by the immobilization process in steps S19 and S39.
Further, the laminated oil palm material W forms a convex portion EQ on the flat surface portion EP of the mold made of the press board 10 and restricts the oil palm material W from extending in a direction parallel to the surface of the oil palm material W. Compressing for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the oil palm material W between the upper mold of the upper press panel 10A and the lower mold of the lower press panel 10B on which the flat part EP and the concave part ER are formed. Since the molded oil palm material W is molded, it can be compression-molded without increasing the area of the laminated oil palm material W, so that an oil palm molded body EO having a desired three-dimensional shape and a desired outer diameter is obtained. It is done. In particular, the oil palm molded body EO can be easily taken out from the mold because the temperature supplied in the heating process of step S16 and step S36 is lowered to be cooled and fixed.
Therefore, the plywood itself made of laminated oil palm material W can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and the components that oil palm inherently has An oil palm molded body EO that is environmentally friendly is obtained.

In particular, the temperature of the oil palm material W laminated after the laminating process of step S12 and step S32 is heated to increase in the heating process of step S16 and step S36, and the heat heated in the compression process of step S17 and step S37. Since the compressed oil palm material W is restricted from extending in a direction parallel to the surface thereof, a compression force in a direction perpendicular to the surface of the oil palm material W is applied to compress the oil palm material W for a predetermined time. The extension that the compression force applied in the compression process of S17 and Step S37 escapes in a direction parallel to the surface of the oil palm material W is limited, and the compression force of all the laminated oil palm materials W is effectively used. In addition, the outer dimensions of the oil palm material W can be made uniform, and the compression rate of the entire oil palm material W is set to a value corresponding to the tree species. It can, will not be put out waste from the plurality of oil palm material W during manufacture.
Therefore, the use ratio of the resin component and sugar component contained in the oil palm material W is increased, and a multilayer plywood bonded with a natural product can be obtained, the loss of the material used is reduced, the cost is reduced, and sick house syndrome is caused. A laminated plywood utilizing the components inherently possessed by oil palm can be obtained by suppressing the amount of formaldehyde-based adhesive used.

In addition, since the palm of the oil palm has no nodes and no annual rings, when the oil palm material W is created by peeling it off from the outer periphery with a rotary race, a uniform thin plate is obtained. As a result, from the oil palm material W The resulting oil palm molded body EO is homogeneous. Moreover, since the joining force is changed by the resin component and sugar component contained in the trunk of the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force.
Moreover, the oil palm material W heated to raise the temperature of the oil palm material W laminated | stacked after the lamination | stacking process of step S12 and step S32 by a heating process, and the oil palm material W heated to the compression process is added to the oil palm material W The compression of step S17 and step S37 is performed by applying a compressive force in a direction perpendicular to the surface of the oil palm molded body EO while restricting extending in a direction parallel to the surface of W. The extension that the compressive force applied in the process escapes in a direction parallel to the surface of the oil palm material W is limited, the compressive force of all the laminated oil palm materials W is effectively used, and the oil palm The outer dimensions of the material W can be made uniform, and the compression rate of all the oil palm materials W can be made uniform, and waste is produced from the plurality of oil palm materials W during production. Theft is not.

The plurality of oil palm materials W are joined by a resin component and a sugar component contained in the trunk of the oil palm itself to form the laminated plywood, and other synthetic resins and synthetic rubbers are used as adhesives. Since it is not used, it can be returned to nature and will not cause pollution problems. Furthermore, because of the compressive force when joined by the resin component and sugar component contained in the trunk of the oil palm itself, there is almost no void in the thin plate, resulting in a dense structure, water resistance, and waterproofing. It is rich in insect repellent and has a long service life even when used as a building material. In addition, since the joining here has the ability to mold from the oil palm trunk to the concave / convex surface opposite to the concave / convex surface generated when the oil palm material thin plate is formed, mechanical joining using the molding ability is also possible. include.

In this way, a predetermined length of the oil palm trunk WD is formed by peeling off to a predetermined thickness with a rotary race while rotating in the circumferential direction, and when one of them is consolidated, a plurality of sheets each having a thickness of 1 mm or more The oil palm material W can be compressed and fixed simultaneously and joined together. In particular, the temperature of the oil palm material W laminated after the lamination process of step S12 and step S32 is heated to increase in the heating process of step S16 and step S36, and the heat heated in the compression process of step S17 and step S37. The laminated oil palm material W is compressed for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the oil palm material W while restricting extending in a direction parallel to the surface of the oil palm material W. Therefore, the extension that the compressive force applied in the compression process of steps S17 and S37 escapes in a direction parallel to the surface of the oil palm material W is limited, and the compressive force of all the laminated oil palm materials W is limited. Can be used effectively, and the compression ratio of all the oil palm materials W can be made uniform, and waste from a plurality of oil palm materials W is produced during production. That there is no.
Therefore, using the resin component and sugar component contained in the oil palm material W, an oil palm molded body EO joined with a natural product can be obtained, the loss of the material used is reduced, the cost is reduced, and the cause of sick house syndrome The use of the formaldehyde-based adhesive is suppressed, and a laminated plywood using the components that oil palm originally has is obtained. Temporarily, since the thin plate process of step S10 and step S30 of the manufacturing method of the oil palm molded body EO uses the oil palm material W, at least compared with the conventional plywood, formaldehyde that causes sick house syndrome Use of adhesive can be suppressed.

In the method for manufacturing an oil palm molded body according to the above-described embodiment, a plurality of oil palm members W are formed by peeling a predetermined length of an oil palm trunk to a predetermined thickness with a rotary race in the circumferential direction in the thin plate process of step S30. The oil palm material W formed in the thin plate process in step S30 in the drying process in step S31 is dried, and a plurality of oil palm materials W dried in the drying process in step S31 in the stacking process in step S32 are stacked in a predetermined state. To do. And it heats so that the temperature of the oil palm material W laminated | stacked in the preheating process of step S36 may be raised, and the surface of the oil palm material W is added to the laminated oil palm material W heated by the preheating process of step S36. The upper and lower molds of the mold are subjected to a compression force in a direction perpendicular to the surface of the oil palm material W and are compressed for a predetermined period of time, while preliminarily extending in parallel to The temperature of the laminated oil palm material W compression-molded for a predetermined time in the preliminary compression process in step S37 by the fixing process is decreased in the preliminary heating process in step S36 in the preliminary fixing process in step S39. Preliminary molding for cooling and fixing, and the laminated oil palm material W under the predetermined humidity and temperature conditions, the laminated oil par Applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material W between the upper mold and the lower mold of the mold while restricting extending in a parallel direction along the surface of the material W for a predetermined time The molding comprises step S42 to step S49 in which the temperature of the laminated oil palm material W that has been compression-molded and compression-molded for the predetermined time is lowered and fixed.
In addition, depending on the form of the oil palm molded body EO or the object of use, the preliminary molding including the preheating process in step S36, the preliminary compression process in step S37, the preliminary fixing process in step S39, and the main molding including steps S42 to S49. Is one or more times as pre-molding the pre-heating process in step S36, the pre-compression process in step S37, and the pre-fixing process in step S39, or one or more times as the main fixing process consisting of steps S42 to S49 as the main molding. Can be executed repeatedly.

Thus, the thin plate process of step S30 formed on a plurality of oil palm materials W, the drying process of step S31 of the oil palm materials W, the stacking process of step S32 of laminating a plurality of oil palm materials W, and the oil Oil palm material W between the upper mold and the lower mold of the mold while regulating the preheating step of step S36 for heating the palm material W and extending in the parallel direction along the surface of the heated oil palm material W Step S39 in which the temperature supplied in the step S37 for compressing and molding for a predetermined time by applying a compressive force in a direction perpendicular to the surface and the temperature supplied in the preheating step in Step S36 is cooled and fixed. This preliminary fixing step is a preliminary molding of the preliminary oil palm molded body HW. The preliminary oil palm molded body HW is a plate shape compressed at a compression rate of 20 to 80%, or a three-dimensional shape body compressed at a compression rate of 20 to 80% with respect to the entire oil palm molded body EO. Also good. At this time, it is restricted from extending in the parallel direction along the surface of the heated oil palm material W, and is molded into a finished dimension. Further, at this time, if the molding is performed by reducing the amount of water vapor pressure to be supplied, the main molding process including the subsequent steps S42 to S49 can be easily performed.
Thus, the laminated oil palm material W fixed in the preliminary fixing process in step S39 is again parallel along the surface of the laminated oil palm material W under predetermined humidity and temperature conditions. While restricting extending in the direction, the upper and lower molds are molded by compressing for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the laminated oil palm material W, and The temperature of the laminated oil palm material W molded by time compression is lowered and cooled, and is permanently fixed by the main molding in step S48.

Therefore, the plurality of oil palm materials W formed by peeling to a predetermined thickness can be formed to a necessary thickness in the stacking process of step S32, and the thickness can be determined according to the intended use. By providing the HW preforming process in the molding process, it is possible to obtain a molded body with high accuracy in the main fixing process including steps S42 to S49. In the preliminary heating step of step S36 for heating to increase the temperature of the oil palm material W laminated in the laminating step of step S32, in particular, when a plurality of oil palm materials W are heated with steam, a resin component such as lignin and the like Since saccharides such as cellulose and hemicellulose are softened and bonded, a solid molded body is obtained by the main immobilization process including steps S42 to S49.

In addition, the laminated oil palm material W is controlled to extend in a direction parallel to the surface of the oil palm material W even in the main fixing step including Step S42 to Step S49, and the upper mold of the mold. And the lower mold are compressed for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material W, so that the area of the laminated oil palm material W is compressed without being expanded. Since it can be molded, an oil palm molded body EO having a desired three-dimensional shape and a desired outer diameter is obtained. In particular, whether it is the preliminary fixing process in step S39 or the main fixing process consisting of steps S42 to S49, the temperature supplied in the heating process of step S36 is lowered from the mold. Because it is cooled and fixed, the oil palm molded body EO is easy to take out.
Since the thin plate process in step S30 of the oil palm molded body EO uses the oil palm material W, it is possible to suppress the use of formaldehyde-based adhesives that cause sick house syndrome at least as compared with conventional plywood. it can.
Therefore, the oil palm molded body EO itself made of the laminated oil palm material W can be molded into a desired shape, and the use of formaldehyde-based adhesive that causes sick house syndrome is suppressed, and oil palm inherently has An oil palm molded body that is environmentally friendly using the ingredients that are present.

In particular, even when the oil palm material W is bonded to each other, other adhesives such as urea resin, epoxy resin, or non-formaldehyde adhesive can be added as necessary to increase the bonding force. Also in this case, the use of an adhesive is less than in the conventional case. Basically, the length direction of the fibers is an array of thin plates that are orthogonal to each other, but the use is determined as a multilayer plywood PW for bending, the entire fiber (vascular bundle) direction is the same, One or two of the multi-layered sheets can have different fiber directions.

[Embodiment 3]
In the embodiment of FIG. 2, it is assumed that only the oil palm material W is used. However, as shown in FIG. 18, a net, for example, a wire net can be inserted therein.
For example, for five oil palm materials W1,..., W5, a metal lath M1 and a metal lath M2 known as a wire mesh are formed to have the same outer shape as the oil palm materials W1,. It is overlaid on the upper surfaces of the palm material W2 and the oil palm material W4. Here, the metal lath M is simply referred to as the metal lath M in the general theory that does not matter the number of sheets, but when it means individual arrangement, it is expressed separately as a specific metal lath M1 and a metal lath M2. The metal lath M1 and the metal lath M2 are obtained by cutting a wound material into a predetermined size, and the cutting may be performed in another place or just before lamination. At the time when the continuous thin plate UWD is formed from the oil palm trunk WD, the metal lath M (simply referred to as the metal lath M when the number of sheets does not matter) is overlapped on the continuous thin plate UWD and simultaneously cut to form the metal lath M1 and the metal lath M2. Good. Alternatively, the metal lath M1 and the metal lath M2 cut at different places may be stacked on the upper surfaces of the cut oil palm material W2 and oil palm material W4.
In the present embodiment, description will be made on the premise that the metal lath M1 and the metal lath M2 are used as the wire mesh. In any case, it is desirable that the net used here is formed thin, and that having mechanical strength is desirable.

Next, as shown in FIG. 19, a total of five oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness and a total of two metal laths M1 and M2 are laminated, and a multilayer material before pressurization. An example of NW will be described.
The multilayer material NW before pressurization includes oil palm materials W1, W3, W5 having short sides in the supply direction of the continuous thin plate UWD that has been peeled off the oil palm trunk WD described with reference to FIG. The thin plates W2 and W4 having long sides in the supply direction of the continuous thin plate UWD shown in b) and the metal lath M1 and the metal lath M2 placed on the upper surface thereof are laminated.
The outer shapes of the five oil palm members W1,..., W5 having a predetermined area and a predetermined thickness may be formed by cutting, or may be formed by cutting a fine tooth saw. Any of the properties of oil palm may be used, but cutting is more efficient from the viewpoint of workability. The metal lath M1 and the metal lath M2 are preferably formed by cutting.

In the present embodiment, oil palm materials W1, W3, W5 having short sides in the supply direction of the continuous thin plate UWD from which the oil palm trunk WD has been peeled, and thin plates W2, W4 having long sides in the supply direction of the continuous thin plate UWD are provided. Although formed with two types of rotary races, it may be set so that five oil palm materials W1,..., W5 can be obtained with a width in the supply direction of the continuous thin plate UWD.
In addition, the metal lath M1 and the metal lath M2 are formed by cutting. As a result, the arrangement is made in a laminated relationship with the oil palm materials W1,..., W5 before the multilayer material NW before pressurization is stacked. It only needs to be completed.

In any case, as shown in FIG. 19, oil palm materials W1, W3, W5 with short sides in the supply direction of continuous thin plate UWD and oil palm materials W2, W4 with long sides in the supply direction of continuous thin plate UWD are mutually connected. What is necessary is just to load the multilayer material NW before pressurization so that the length direction of the fiber intersects. Further, the metal lath M1 and the metal lath M2 formed by cutting do not have to be disposed on the upper surfaces of the oil palm materials W2 and W4, and any position in the oil palm materials W1,..., W5. One sheet, two sheets, or three sheets may be disposed on the surface.
Of course, the oil palm materials W1, W3, W5 with short sides in the supply direction of the continuous thin plate UWD and the oil palm materials W2, W4 with long sides in the supply direction of the continuous thin plate UWD shown in FIG. Can be combined with two oil palm materials W having a short side in the supply direction of the continuous thin plate UWD and three oil palm materials W having a long side in the supply direction of the continuous thin plate UWD. .

Five oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness are cut and the humidity is adjusted until it is aligned with the stacked state of the pre-pressing multilayer material NW as shown in FIG. Must be applied to both sides of the oil palm materials W1,..., W5 having a predetermined area and thickness. Since the drying of the five oil palm materials W1,..., W5 proceeds until the multi-layer material NW before pressurization is sent to the production line in which five oil palm materials W1,. In this dry state, as shown in FIG. 20A, it can be laminated as a multilayer material NW before pressurization. In order to maintain the laminated state, in order to prevent the spread of the oil palm material W in the surface direction, the frame body 20 for positioning each side of the five oil palm materials W1,..., W5 (see FIG. 7). Alternatively, it is desirable to set the positioning hole 18 (see FIG. 5). For simplification, the description of the positioning hole 18 is the same as in FIGS.
The step of laminating a plurality of oil palm materials W, metal laths M1, and metal laths M2 dried in the drying step in a predetermined state is called a laminating step here.

The positioning hole 18 has an outer diameter that matches the outer shape of the oil palm material W, and the five oil palm materials W1,..., W5 and the two metal laths M1 and M2 are mounted in the positioning hole 18. Placed. Then, the upper press panel 10A and the lower press are controlled while the positioning hole 18 restricts the oil palm material W heated in the heating process from extending in the parallel direction along the surface of the oil palm material W. A compression force in a direction perpendicular to the surface of the oil palm material W is applied to the board 10B and compression molding is performed for a predetermined time. Although not shown, the five oil palm members W1,..., W5 and the metal laths M1 and M2 are compressed in the positioning hole 18. The surface of the upper press panel 10A that presses the five oil palm materials W1,..., W5 and the metal laths M1, M2 is on the upper surface of the five oil palm materials W1,. Are equal. Naturally, the bottom surfaces of the five oil palm members W1,..., W5 and the metal laths M1, M2 have the same size and shape so that they can be fitted to the lower press board 10B.

First, a method for directly molding the laminated plywood PW of FIG. 20B from the pre-pressing multilayer material NW of FIG. 20A will be described.
Here, the consolidated laminated plywood PW shown in FIG. 20B is compressed by applying a predetermined compressive force under a predetermined temperature condition to a multilayer laminated material NW before pressurization, for a predetermined time. After a lapse of time, the temperature is lowered to a predetermined temperature, fixed, and then decompressed.
That is, a compression step of applying a compression force in a direction perpendicular to the surface of the oil palm material W to the laminated oil palm materials W1,..., W5 and the metal laths M1, M2 heated by the heating step is performed. After pressing for a predetermined time at a predetermined temperature in the compression process, the temperature supplied in the heating process is lowered, and through a fixing process for maintaining the compressed state, a consolidated laminated plywood PW is obtained.

Here again, the step of heating to raise the temperature of the laminated oil palm material W after the laminating step is called a heating step, and the surface of the laminated oil palm material W is heated by the heating step. The step of applying a compressive force in a right angle direction is called a compression step. Then, after pressing for a predetermined time in the compression step, the temperature supplied in the heating step is lowered, and the step of cooling and fixing at normal temperature or slightly lower than that is fixed in a consolidated state. In this sense, it is called an immobilization process.
Moreover, the method of directly molding the laminated plywood PW of FIG. 20B from the pre-pressing multilayer material NW of FIG. 20A is performed once in the laminating step, heating step, compression step, and fixing step. This is only a continuous process.

In the form of the laminated plywood PW in FIG. 20B, the multilayer material NW before pressurization in FIG. In particular, in the present embodiment, the laminate plywood PW is finally compressed with a mold to form the laminated plywood PW. From the pre-pressing multilayer material NW in FIG. 20A, the metal lath in FIG. An oil palm material W sandwiching M1 and M2 is consolidated into a laminated plywood PW.

The compacted material manufacturing apparatus MC for manufacturing the laminated plywood PW sandwiching the metal laths M1 and M2 of the present embodiment will be briefly described.
The press machine 10 is mainly provided with the press machine 10 in which the internal space IS and the positioning hole 18 are formed by the divided structure of the upper press machine 10A and the lower press machine 10B. The movement restriction of the outer periphery of the multilayer material NW can be the frame 20 shown in FIG. The frame 20 as the movement restriction of the outer periphery of the pre-pressurized multilayer material NW is determined as a structure that can move up and down or a fixed structure depending on the dimensions of the upper press panel 10A.

The frame body 20 shown in FIG. 7 is a modified example of the compacted material manufacturing apparatus MC of the embodiment, and has a vertically movable structure, and is disposed on the lower press panel 10B of FIGS. In place of the positioning hole 18.
In FIG. 7, an outer lower press disk 10Ba and an inner lower press disk 10Bb having the same height are disposed on the base plate 25 of the lower press disk 10B, and a frame groove 21 is formed therebetween. A plurality of coil springs 22 are disposed on the base plate 25 side of the frame body groove 21, and a square movable frame 23 is disposed above the coil springs 22. A cutout is formed on the inner surface of the movable frame 23 to form a fluid path 24 that guides fluid such as water vapor from the side surface of the pre-pressurized multilayer material NW. The inner periphery of the square movable frame 23 is substantially equal to the outer periphery of the pre-pressing multilayer material NW. When the pre-pressing multilayer material NW enters the square movable frame 23, the thin plates W2,..., W5 and the metal lath M1. , M2 is not misaligned. Therefore, when the upper press board 10A is lowered, even if it has a width larger than the size of the lower press board 10B, when the upper press board 10A comes into contact with the movable frame 23, the movable frame 23 becomes elastic to the plurality of coil springs 22. It descends against it and responds to the compression of the multilayer material NW before pressurization. Then, the compression of the pre-pressurized multilayer material NW is completed at the movement limit of the plurality of coil springs 22. Of course, when the upper press board 10A is inserted into the movable frame 23 of the lower press board 10B, the movable frame 23 can be fixedly arranged on the lower press board 10B. That is, the movable frame 23 of the lower press panel 10B can be fixed and compressed by the upper press panel 10A inserted into the movable frame 23.

In this way, the thickness of the oil palm materials W1,..., W5 is heated and compressed by the external force applied in the direction perpendicular to the length direction of the fibers of the oil palm material W, and the whole is compressed and compressed. A laminated plywood PW having a rate of 60% or more is manufactured. At this time, the elongation in the direction parallel to the plane of the oil palm material W is caused by the compressive force in the thickness direction of the oil palm materials W1,. It is regulated by 23 and does not grow. Therefore, the laminated plywood PW sandwiching the metal laths M1 and M2 is subjected to a die processing with a uniform compressive force.

In the present embodiment, after controlling the vapor pressure, the internal vapor pressure is gradually released by releasing the vapor pressure, and the vapor pressure in the pre-pressurized multilayer material NW is lowered and fixed by cooling. When released, a laminated plywood PW having no surface deformation called bulging deformation or puncture can be formed. That is, the laminated plywood PW sandwiched with the metal laths M1 and M2 as the nets manufactured in the present embodiment does not cause bulging deformation and surface cracks after being released from compression, and ensures stable quality. In the present embodiment, the laminated plywood PW is obtained by compressing and fixing using the upper press board 10A and the lower press board 10B. However, when the present invention is carried out, a microwave used by a normal microwave oven is used. The laminated plywood PW can be obtained even if the multilayer material NW before pressurization is heated and compressed by dielectric heating at a high frequency slightly lower than the wave frequency band, and is fixed.

In the oil palm material W and the metal laths M1 and M2 to be laminated according to the present embodiment, the fiber directions of the vascular bundle or the like may be laminated in the same direction, or the fiber directions may be laminated to be orthogonal to each other. .
In particular, when laminated with the same fiber direction, as shown in FIG. 21, fibers such as vascular bundles of the wood surface layer softened in the consolidation process have the same fiber direction adjacent to the lamination direction (longitudinal direction). For example, the vascular bundle enters the parenchyma between the vascular bundles of the counterpart oil palm material W, and the oil palm materials W fixed in the entangled state are firmly joined to each other. Is done. In addition, since the expansion rate and contraction rate of the joint surface can be made completely equal, no stress is applied to the joint surface even if the ambient environment conditions change. In particular, when the fiber directions of the vascular bundles and the like are laminated with the same direction, when compressive force is applied thereto, the oil palm material W becomes the fiber direction of the original oil palm trunk WD, and the oil palm material W is different. However, since the vascular bundle enters between the vascular bundles of the oil palm material W as the counterpart material and is fixed there, it can be integrated in a natural joined state.
Accordingly, the bonding strength is high and the mechanical strength is high, and a stable dimensional shape after consolidation is ensured.

Further, at this time, the metal lath M1 and the metal lath M2 as the metal mesh do not extend in the plane direction of the oil palm material W, and the oil palm material W1 and the oil palm material W2 between which the metal lath M1 and the metal lath M2 are sandwiched, the oil It enters into the direction which is applying the pressure of the surface of palm material W3 and oil palm material W4.
Further, a metal lath M1 or a metal lath M2 is disposed between the oil palm material W1 and the oil palm material W2, and between the oil palm material W3 and the oil palm material W4, and the metal laths M1 and M2 are joined between the oil palm materials W. The amount of the resin component and the sugar component contained in the oil palm material W at the time of joining from between the oil palm materials W is not required to use other adhesives. Is also secured.

Moreover, since the metal laths M1 and M2 are embedded as inserts in the resin component and sugar component contained in the oil palm material W, the oil palm material W and other wood are not only integrated with the oil palm material W. Even if they exist.
In particular, by arranging one metal lath M1, M2 at the center of the plurality of oil palm materials W or at a position other than the center, it acts as an insert, and the surface of the laminated plywood PW is bent. Even when an external force is applied, the surface of the laminated plywood PW can be prevented from being bent by the action of the metal laths M1 and M2.
In particular, in the oil palm material W and the metal laths M1 and M2 to be laminated according to the present embodiment, even if the fiber directions of the vascular bundles and the like are laminated, the bending can be prevented. Curving can be prevented even when the layers are stacked with their directions orthogonal to each other.

Since one or more nets, that is, metal laths M1 and M2 are disposed between the oil palm materials W and the metal lath M1 or metal lath M2 is joined between the oil palm materials W, the oil palm material W Since the nets are joined and integrated with each other, the amount of the resin component and the sugar component contained in the oil palm material W at the time of joining from between the oil palm materials W is not required to use other adhesives. As a means for preventing bending because the metal lath M1 and the metal lath M2 are not expanded or contracted corresponding to the bending even if the oil palm material W tries to bend. Can be provided. Moreover, it becomes difficult to bend with respect to the surface which laminated | stacked the said oil palm material by arrange | positioning a net | network in a several location.

Preferably, it is a surface cut parallel to the fibers of the oil palm material W to be laminated and the tree heart side surfaces, or a surface cut parallel to the fibers and the bark side surfaces face each other for lamination. Is preferred. That is, when the oil palm material W is divided at a linear position passing through the tree core of the oil palm trunk WD and arranged so as to face each other, the tree heart side surfaces or the bark side surfaces face each other. By joining together, warpage deformation in a specific direction due to the difference in cell density between the tree heart side and the bark side can be prevented.

Moreover, the laminated plywood of this Embodiment is processed with the compacting material manufacturing apparatus MC which manufactures the oil palm molded object EO of Embodiment 1. FIG.
As shown in the flowchart of FIG. 8, in the compression process of step S17, the compression pressure of the upper press board 10A is set to a predetermined pressure with respect to the lower press board 10B on the fixed side, and the multilayer material NW before pressurization is the upper press board 10A. Then, it is heated and compressed for a predetermined time by the lower press panel 10B. At this time, as shown in FIG. 6C, when the peripheral portion 10a of the upper press panel 10A comes into contact with the peripheral portion 10b of the lower press panel 10B, the seal member 11 disposed on the peripheral portion 10a of the upper press panel 10A. As a result, the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are sealed.
Thus, by heating and compressing by surface contact of the press panel, in particular, by applying pressure after heating to the heating temperature, even when warp deformation during drying occurs in the multilayer material NW before pressurization, Flattening can be achieved without causing cracks, cracks, etc., and heat compression can be performed efficiently. Furthermore, while the multilayer material NW before pressurization is heated and compressed and the internal space IS and the positioning hole 18 are kept in a sealed state, the water vapor originally contained in the multilayer material NW before pressurization becomes the vapor pressure. Thus, the dried wood DW can be freely diffused and discharged through the internal space IS and the positioning hole 18, so that the entire thickness is efficiently and uniformly heated and compressed.

In this way, by controlling the vapor pressure of the internal space IS and the positioning hole 18, a plurality of laminated oil palm materials W are heated and compressed with the metal laths M1 and M2 sandwiched therebetween. That is, by making the peripheral surface of the oil palm material W laminated and the inside thereof the same temperature, pressure, and vapor pressure state as the internal space IS and the positioning hole 18, the entire multilayer material NW before pressurization is made uniform, There is no processing strain, and shrinkage and expansion due to a change in the restoring force after molding and the surrounding environmental conditions are remarkably suppressed. In particular, by controlling the vapor pressure by discharging or introducing water vapor while maintaining a predetermined pressure state, the surface is prevented from being carbonized, uniformly heated and compressed, and further, the surface is prevented from drying. Smooth fixation is achieved, and recovery, return, deformation, etc. after molding are suppressed.

Incidentally, the start of the vapor pressure control in the internal space IS and the positioning hole 18 in the sealed state due to the introduction or discharge of water vapor is performed after the temperature of the upper press panel 10A and the lower press panel 10B reaches a specific heating temperature. It is desirable to be done. If it does in this way, water vapor can osmose | permeate in the multilayer material NW before pressurizing which sandwiched the metal laths M1 and M2, and thereby the chemical change of the oil palm material W can be caused sufficiently. As a result, the oil palm material W Can be sufficiently and uniformly fixed, and the return due to moisture absorption, the deformation due to drying, and the like are small. That is, when the introduction of water vapor in the closed internal space IS and the positioning hole 18 is started before the temperatures of the upper press board 10A and the lower press board 10B reach a specific heating temperature, the water vapor is condensed. The interior space IS and the positioning hole 18 in the sealed state are filled with water, and the moisture content of the wood increases, and as a result, return due to moisture absorption, deformation due to drying, and the like are likely to occur. Further, even when the discharge of water vapor in the internal space IS and the positioning hole 18 in the sealed state is started before the temperatures of the upper press board 10A and the lower press board 10B reach the second heating temperature, the water content of the outer layer portion is also increased. The excess internal space IS based on the rate and the moisture in the positioning hole 18 are difficult to be removed, and the moisture content of the wood increases, so that return due to moisture absorption, deformation due to drying, and the like easily occur.
In addition, it is preferable to end the vapor pressure control before starting the cooling described later. If the vapor pressure control is not finished before starting the cooling described later, the cooling processing efficiency is lowered.

Further, the immobilization process in step S19 is performed while the valve V11 is kept at the same predetermined pressure (preferably within the range of 1 to 100 kg / cm ² ) as the pressure in the heating process in step S16 and the compression process in step S17. , The valve V12 and the valve V13 (FIG. 5) are opened, and normal temperature cooling water is passed from the boiler device (not shown) through the piping 15 of the upper press panel 10A and the piping 16 of the lower press panel 10B. As shown in e), the upper press board 10A and the lower press board 10B are cooled to around room temperature and held for a predetermined time (for example, 10 to 120 [min]).
Finally, the pressure is released in the fixing step of step S19, and as shown in FIG. 6 (f), the upper press disk 10A is gradually raised and separated from the fixed-side lower press disk 10B. The pressure and the sealed state are released, and the laminated plywood PW sandwiching the finished metal laths M1 and M2 is taken out from the internal space IS and the positioning hole 18 to complete the series of processing steps.

In this way, fixing in a consolidated state is stabilized by cooling under a pressure state in which deformation does not occur. Then, after cooling in the pressurized state, by releasing the pressure, that is, by lowering the water vapor pressure in the pre-pressing multilayer material NW sandwiching the metal laths M1 and M2 by cooling, the pressure is gradually released and the inside By releasing the vapor pressure, excess water vapor can be liquefied and removed, and the laminated plywood PW is free from swelling deformation, cracking, breakage (puncture), etc. when cooling compression is released. That is, according to the laminated plywood PW sandwiching the metal laths M1 and M2 of the present embodiment, stable quality is ensured without causing bulging deformation, cracking, destruction, etc. after compression release.

The thickness of the laminated multilayer material before pressurization NW as a whole is heated and compressed by an external force applied in a direction perpendicular to the length direction of the fibers of the multilayer material before pressurization NW laminated with the metal laths M1 and M2 sandwiched, and compacted. Thus, in this embodiment, a laminated plywood PW having a specific gravity of 1.2 or more is manufactured. The laminated plywood PW sandwiched between the metal laths M1 and M2 obtained in this way is firmly joined to the oil palm materials W and the metal laths M1 and M2 by consolidation. This is because cellulose, hemicellulose, and lignin are hydrogen-bonded by compaction processing, and especially the palm of an oil palm contains many sugars, lignin, plastic components, etc., and these components are decomposed and softened by compaction processing. The oil palm material W functions as a binder by being recrystallized and recombined after moving between the oil palm materials W, and further, the fibers of the surface layer of the oil palm material W are softened by the consolidation process, and the lamination direction It is considered that the timbers are firmly joined together by being intertwined with the fibers of the wood adjacent to the wood.

As described above, according to the laminated plywood PW sandwiching the metal laths M1 and M2 of the present embodiment, wood can be joined together without using an artificial adhesive or environmental adhesive due to formaldehyde or a natural adhesive that is expensive. Therefore, it is environmentally friendly and the cost can be reduced.
In addition, when the oil palm material W is joined by using an adhesive, it is common to apply the adhesive and then to press the adhesive to cure the adhesive. In contrast to the need for a tightening process, according to the laminated plywood PW sandwiching the metal laths M1 and M2 of the present embodiment, the wood is joined without using an adhesive by compaction processing. A joining process is unnecessary, and the manufacturing process can be simplified.

The laminated plywood PW sandwiched between the metal laths M1 and M2 obtained in this way is compacted to reduce the gap in the oil palm material W, and soften lignin, hemicellulose, etc. constituting the cell wall. -Decomposition, recombination, and recrystallization increase cell density, compensate for the disadvantage of oil palm material W, which is low in specific gravity, low in strength, and easily deformed, ensuring high strength and stable dimensional shape. In particular, the entire thickness of the laminated oil palm material W is uniformly compressed by performing the compacting process so that the air-dry specific gravity is 0.8 or more, the properties of the oil palm material W are changed, and the metal lath M1, The M2 insert significantly increases the hardness and the like, and the variation in physical properties and characteristic values such as hardness is reduced. Furthermore, the variation in the expansion rate and the drying rate due to changes in ambient environmental conditions is also small, and deformation due to it. And the dimensional shape stability is increased. Therefore, the physical properties are stable, the quality between products is small, and the commercial value is high. Furthermore, a plurality of dried oil palm materials W are laminated and the whole is consolidated in a state where the metal laths M1 and M2 are sandwiched, and the expansion rate and contraction rate due to changes in ambient environment conditions are substantially uniform at the joint surface. Therefore, stable bondability is maintained, and stable dimensional shape is ensured without causing distortion, deformation, cracks, and the like due to stress applied to the bonding surface due to changes in ambient environmental conditions.

In particular, in the case of laminating with the same fiber direction of the oil palm material W, the fibers of the surface layer softened in the consolidation process are the fibers of the oil palm material W that are adjacent in the longitudinal direction with the same fiber direction, Moreover, the oil palm material W fixed easily in the state in which the metal laths M1 and M2 are easily entangled and entangled with each other is firmly joined. In addition, since the expansion rate and contraction rate at the joint surface can be made completely equal, no stress is applied to the joint surface when the ambient environmental conditions change. Therefore, the bonding strength is high, the mechanical strength is also high, and high dimensional shape stability is ensured.
On the other hand, when the multilayered material NW before pressurization is laminated with the fiber directions orthogonal to each other, even if expansion and contraction force is generated due to changes in the surrounding environmental conditions after the consolidation process, the mutual woods interact with each other and specify Directional warpage deformation is prevented. In particular, when the total number of sheets is an odd number, when laminated with the fiber directions orthogonal to each other, the fiber direction of the single plate is parallel and the cross section is symmetric on the front and back, preventing distortion due to changes in ambient environmental conditions, etc. Is done. At this time, a tough joining state can be obtained by increasing the compressive force with the same fiber direction in consolidation.
If the total number of sheets is an even number, the same fiber direction is laminated in a part of the inside, and the others are laminated with the fiber directions orthogonal to each other, so that the front and back fiber directions are aligned and the ambient environmental conditions It is possible to prevent distortion and the like due to the change of.

And the laminated plywood PW of the present embodiment is densified from the outer surface even when the compressed surface is densified by compaction processing and the oil palm material W does not use an expensive natural adhesive. The surface quality is good. That is, peeling from the fiber surface can be suppressed without using an artificial adhesive or a high-cost natural adhesive, which is environmentally friendly and can reduce costs.
Furthermore, since the entire thickness is compacted, even if a large chamfering process or curved surface process is applied to the ridgeline on the thickness side surface, high hardness is ensured on the end surface.

By the way, even in the case of using oil palm material W near the soft tree center, which has a particularly high water content in oil palm, metal laths M1, M2 can be embedded by consolidation to increase the strength, or consolidation By controlling the temperature and compression during processing, it is possible to discharge excess moisture, the water vapor pressure inside the multilayer material NW before pressurization is uniformly and suitably adjusted, and the deformation of the metal laths M1 and M2 is difficult. Therefore, swell deformation and the like after compression processing are also suppressed. Therefore, it is possible to form the laminated plywood PW having sufficient strength and stable dimensional shape. Therefore, effective utilization of the entire trunk of oil palm can be achieved.
In particular, when the oil palm material W is dried and disposed on the front and back surfaces having a small air-dry specific gravity, the front and back layers contacting the upper press panel 10A and the lower press panel 10B as described above. Since a material having a small air-dry specific gravity after drying is disposed and compaction processing is performed, sufficient heat compression is performed by the upper press panel 10A and the lower press panel 10B in the material having a small air-dry specific gravity after drying. Thus, the difference in specific gravity between the woods is reduced, and the difference in the dimensional change rate after commercialization is also reduced. Therefore, the stability of the dimensional shape after commercialization increases.

As described above, the laminated plywood PW according to the present embodiment is obtained by peeling the trunk of a soft oil palm having a high moisture content as the oil palm material W, and then drying, further laminating a plurality of sheets, and compacting the surface. Not only the strength and hardness of the entire plate thickness are greatly improved, but a wide range of applications such as flooring materials, waistboard materials, indoor furniture materials, and housing exterior materials used by surface coating are expected. In particular, since the surface hardness is increased by compaction processing and sufficient strength and hardness can be ensured even if the thickness is small, the thickness can be reduced in commercialization.

Furthermore, when the fiber directions are laminated so as to be orthogonal to each other, even if expansion and contraction force occurs due to changes in the ambient environmental conditions after consolidation, the mutual oil palm materials W interact with each other and warp deformation in a specific direction occurs. Is prevented. At this time, since the vascular bundles of the oil palm material W are in a crossed state, the vascular bundles of each other are wound, and the metal laths M1 and M2 protect the crossed state of the vascular bundle of the oil palm material W. That is, cellulose, hemicellulose, and lignin are hydrogen-bonded by compaction under the entrained state of the oil palm material W. In particular, oil palm tree trunks contain a large amount of sugars, lignin, plastic components, etc. As the components of the composition break down and soften, they ooze out around the vascular bundle and form a space for recrystallization and recombination to enhance the binder function.

[Embodiment 4]
The laminated plywood PW shown in FIG. 19 is laminated by crossing the fiber directions such as the vascular bundle of the oil palm material W from the multilayer material NW before pressurization, and directly compressed by the upper die and the lower die of the flat plate mold. As shown in FIG. 21, the fiber direction of the vascular bundle of the oil palm material W is made parallel to each other, as shown in FIG. It can also be laminated and used as the multilayer material NW before pressurization.
Specifically, the oil palm material W1, the metal lath M1, the oil palm material W2, the oil palm material W3, the metal lath M2, the oil palm material W4, and the oil palm material W5 are stacked in this order from the top.

In this way, the fiber bundles such as vascular bundles are laminated in parallel, one or more nets, that is, metal laths M are disposed between the oil palm materials W, and the metal laths M are disposed between the oil palm materials W. It is joined. The net between the oil palm materials W, for example, the metal lath M, is secured even if the resin component and sugar component contained in the oil palm material W are not used, and the mutual oil palm material W Since the vascular bundle is in a parallel state, the vascular bundle on the opposite surface enters between the vascular bundles at high temperature and under pressure, and cellulose, hemicellulose, and lignin are hydrogen-bonded by compaction processing in this entrained state. In particular, oil palm tree trunks contain a lot of sugar, lignin, plastic components, etc., so these components decompose and soften and ooze out around the vascular bundle, and then recrystallize and recombine. As a result, it functions as a binder and is integrated.
Therefore, it is easy to join the oil palm material W and the net such as the metal lath M, and even if the oil palm material W tries to bend, the metal lath M does not expand or contract corresponding to the bend. Can be provided. Moreover, it becomes difficult to bend with respect to the surface which laminated | stacked the said oil palm material by arrange | positioning a net | network in a several location.

In particular, when the fiber directions are laminated in parallel to each other, even when expansion and contraction force is generated due to changes in ambient environmental conditions after consolidation, the oil palm materials W interact with each other and warp deformation in a specific direction. Even if this occurs, the metal lath M prevents the deformation. That is, even when the total number of oil palm materials W is an odd number, distortion caused by changes in ambient environmental conditions can be prevented in the same manner as when the fiber directions are stacked with the fiber directions orthogonal to each other.
Also in the case of this embodiment, preferably, it is a plane cut parallel to the fibers of the oil palm material W to be laminated, and the side surfaces of the tree cores, or a plane cut parallel to the fibers and the side of the bark. It is preferable that the layers are laminated to face each other. That is, when the oil palm material W is divided at a linear position passing through the tree core of the oil palm trunk WD and arranged so as to face each other, the tree heart side surfaces or the bark side surfaces face each other. By joining together, warpage deformation in a specific direction due to the difference in cell density between the tree heart side and the bark side can be prevented.

[Embodiment 5]
The laminated plywood PW sandwiching the metal lath M shown in FIG. 19 is laminated from the multilayer material NW before pressurizing with the fiber direction of the vascular bundle of the oil palm material W intersecting, and directly, the upper mold and the lower mold of the flat plate mold 22 is formed by compression with a mold, and is laminated by crossing the fiber directions of the oil palm material W vascular bundle or the like, but as shown in FIG. It is also possible to laminate in parallel directions, laminate one side or both sides of the laminated exposed design surface as a plate material other than the oil palm material W, and use it as the pre-pressurized multilayer material NW.
Specifically, from the top, one piece can be selected from any one of Lauan thin plate, China thin plate, and softwood thin plate peeled off by wig. In addition, one thin plate made of wood other than oil palm material W is, for example, persimmon, cedar, rice bran, persimmon leaves, rice cedar, Karamatsu, red pine, chestnut, persimmon, persimmon, persimmon, cherry, persimmon, It is also possible to use a thin plate that makes use of the grain of firewood. Here, the thin plate Y1. Then
Oil palm material W2, metal lath M1, oil palm material W3, oil palm material W4, metal lath M2, and oil palm material W5 are stacked in this order.

In this way, fiber bundles such as vascular bundles are laminated in parallel, and one or more nets, that is, metal laths M1 and M2 are disposed between the oil palm materials W2,. A metal lath M1 or a metal lath M2 is joined between the materials W2,..., W5. The network between the oil palm materials W2,..., W5 is ensured even if the resin components and sugar components contained in the oil palm materials W2,. Since the vascular bundles of the respective oil palm materials W are in a parallel state, the vascular bundle on the opposite surface enters between the vascular bundles in a high-temperature pressurized state. Hemicellulose and lignin are hydrogen-bonded, and especially the trunk of oil palm contains a lot of saccharides, lignin, plastic components, etc., so these components decompose and soften and ooze out around the vascular bundle. By being recrystallized and recombined, it functions as a binder and is integrated.
Therefore, it is easy to join the oil palm material W to the net such as the metal lath M1, the metal lath M2, and even if the oil palm material W tries to bend, the metal lath M1 and the metal lath M2 do not expand or contract corresponding to the curve. It can be provided as a means for preventing bending. In addition, by arranging the nets at a plurality of locations, it becomes difficult for the surface on which the oil palm materials W2,.

In particular, when laminated with the fiber directions parallel to each other, the oil palm materials W2,..., W5 interact with each other even if expansion and contraction force occurs due to changes in the ambient environmental conditions after consolidation. Even if warpage deformation in a specific direction occurs, the metal lath M1 and metal lath M2 prevent the deformation. That is, even when the total number of oil palm materials W is an odd number, distortion caused by changes in ambient environmental conditions can be prevented in the same manner as when the fiber directions are stacked with the fiber directions orthogonal to each other.
Also in the case of this embodiment, preferably, it is a plane cut parallel to the fibers of the oil palm material W to be laminated, and the side surfaces of the tree cores, or a plane cut parallel to the fibers and the side of the bark. It is preferable that the layers are laminated to face each other. That is, when the oil palm material W is divided at a linear position passing through the tree core of the oil palm trunk WD and arranged so as to face each other, the tree heart side surfaces or the bark side surfaces face each other. By joining together, warpage deformation in a specific direction due to the difference in cell density between the tree heart side and the bark side can be prevented.

Furthermore, the thin plate Y1 is secured without the use of other adhesives for the resin component and sugar component contained in the oil palm material W2, and the fiber directions of the oil palm material W are parallel to each other. Fibers on the surfaces facing each other in the direction of the fibers in the pressurized state enter, and by compacting under this state, cellulose, hemicellulose, lignin are hydrogen-bonded, especially sugar palm, lignin, Since many plastic components are contained, these components decompose and soften and ooze out around the vascular bundle, and then recrystallize and recombine to function as a binder and integrate. It will be.
Therefore, the thin plate Y1, the oil palm materials W2,..., W5 and the metal lath M1, the metal lath M2, etc. can be easily joined, and even if the oil palm materials W2,. Since the thin plate Y1, the metal lath M1, and the metal lath M2 do not expand or contract corresponding to the curvature, the heel thin plate Y1 and the metal lath M1, M2 can be provided as means for preventing the curvature.

[Embodiment 6]
Further, as shown in another embodiment 6 in FIG. 23 (a), a plate-like laminated plywood PW is formed, and the laminated plywood PW is lifted and shown in FIG. 23 (b). The leg JW is integrally joined by the compacted material manufacturing apparatus MC to form an oil palm molded body as shown in FIG. At this time, if the laminated plywood PW and the leg JW are joined so that their joining surfaces are in the same fiber length direction, the joining strength can be increased.
Also in this embodiment, when forming the laminated plywood PW, the compression rate may be about 20 to 80%, or the compression rate in the state of the specific laminated plywood PW is fixed, and only the leg JW has a compression rate of 20%. Bonding may be performed at about 80%. Of course, the opposite may be possible.
In the fourth embodiment, the total load of the laminated plywood PW is applied to the leg JW, but the concentrated load is dispersed by the metal lath M, and stable mechanical strength can be maintained.

[Embodiment 7]
As shown in the seventh embodiment of FIG. 24, the laminated plywood PW having a predetermined thickness integrally holds the oil palm materials W1,..., W5 stacked in a plurality of layers only by the recess EQ, and other than the recess EQ. These locations may be compacted or maintained in an overlapped state. In this embodiment, the use is suitable for an attic of a house, a heat insulating material of a wall, and the like.
In the case of this embodiment, the metal lath M1 and the metal lath M2 are arranged on both surfaces of the oil palm material W3 which is the center, or the whole is made into four oil palm materials W1,. It is preferable to arrange one metal lath M1.

The inventors conducted the experiments shown in Tables 1 to 5 above, but the same result was obtained for the laminated plywood sandwiched between the metal laths M1 and M2, and the compression ratio should be 50% or more. It was confirmed that practically no problem occurred if the rate was 40% or more.

As described above, the laminated plywood according to the present embodiment is formed by stripping a predetermined length of oil palm trunk WD to a predetermined thickness with a rotary race while rotating it in the circumferential direction, and then compressing it. A lauan formed by peeling one or more oil palm materials W having a thickness of 1 mm or more and a lauan trunk, a china trunk or a coniferous trunk having a predetermined length in a circumferential direction while rotating the lauan trunk, a china trunk or a conifer tree trunk from the outer periphery to a predetermined thickness. One or more of a thin plate, a Chinese thin plate, or a softwood thin plate is disposed facing the oil palm material W, and these are compressed, fixed, and integrally joined. Moreover, a net such as a metal lath M is disposed between the oil palm materials W, and a net such as the metal lath M is joined between the oil palm materials W.

Therefore, a net made of metal lath M is arranged between the oil palm materials W, and the nets are joined between the oil palm materials W. In particular, the nets are joined and integrated between the oil palm materials W. Therefore, the amount of the resin component and the sugar component contained in the oil palm material W at the time of joining from between the oil palm materials W can be ensured without using another adhesive.
In addition, one or more oil palm materials W and one or more of Lauan thin plate, China thin plate, and softwood thin plate are arranged facing the oil palm material W, and they are compressed, fixed, and joined together. Since it is a thing, the laminated plywood PW joined by the natural thing using the resin component and sugar component which the oil palm material W contains is obtained. Moreover, since one or more of Lauan thin plate, China thin plate, and softwood thin plate can be used as a core material and used as a design surface, a laminated plywood PW suitable for the application can be manufactured.
Therefore, even if a thermosetting resin is applied to the surface of the thin plate Y1 facing the oil palm material W2 in advance, the use of a formaldehyde-based adhesive that causes a sick house syndrome becomes a quarter of the usage fee of the adhesive. The laminated plywood PW using the components inherently held by the oil palm is obtained.

Since one or more metal laths M are arranged between the oil palm materials W, and one or more meshes are joined between the oil palm materials W, the nets are connected between the oil palm materials W. Since it joins and integrates, since the amount of the resin component and sugar component which oil palm contains at the time of joining from between oil palm materials W is secured without using other adhesives, oil palm Joining of the material W and the net is easy, and even if the oil palm material W tries to bend, the net does not expand or contract corresponding to the bend, so it can be provided as means for preventing the bend. Moreover, it becomes difficult to produce a bending with respect to the surface which laminated | stacked the oil palm material W by arrange | positioning a net | network in a several location.

As described above, the laminated plywood of the present embodiment is formed by peeling a predetermined length of oil palm trunk WD to a predetermined thickness with a rotary race while rotating it in the circumferential direction, and then compacting it. A lauan formed by peeling off a predetermined length of lauan trunk, china trunk, or conifer trunk from the outer circumference to a predetermined thickness with a rotary race while rotating at least one oil palm material W having a thickness of 1 mm or more and a lauan trunk, a china trunk, or a conifer trunk in a circumferential direction. One or more of a thin plate, a Chinese thin plate, or a softwood thin plate is disposed facing the oil palm material W, and these are compressed, fixed, and integrally joined. Moreover, a net is disposed between the oil palm materials W, and the net is joined between the oil palm materials W.

Therefore, what is necessary is just to arrange | position a net | network between oil palm materials W and to join the net | network which consists of metal laths M between oil palm materials W. In particular, the nets are joined and integrated between the oil palm materials W, and the amount of the resin component and the sugar component contained in the oil palm material W at the time of joining from among the oil palm materials W is different from the other. It is ensured without using an adhesive.
In addition, one or more oil palm materials W and one or more of Lauan thin plate, China thin plate, and softwood thin plate are arranged facing the oil palm material W, and they are compressed, fixed, and joined together. Since it is a thing, the laminated plywood PW joined by the natural thing using the resin component and sugar component which the oil palm material W contains is obtained. Moreover, since one or more of Lauan thin plate, China thin plate, and softwood thin plate can be used as a core material and used as a design surface, a laminated plywood PW suitable for the application can be manufactured.
Therefore, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that oil palm originally has is obtained.

Since this oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness by a rotary race, a uniform oil palm material W is obtained. As a result, the oil palm material is obtained. A laminated plywood PW sandwiched with a net according to the situation of a metal, chemical fiber, natural fiber, or the like made of W becomes homogeneous. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm trunk WD itself depending on the applied temperature and pressure, an arbitrary adhesive force can be obtained by controlling the applied temperature and pressure. And in what forms the laminated plywood PW by joining the plurality of oil palm materials W with the resin component and sugar component contained in the oil palm trunk WD itself, other synthetic resins and synthetic rubbers are used as adhesives. Because it is not, it can be returned to nature and does not cause pollution problems.

Furthermore, since the oil palm trunk WD itself contains a resin component such as lignin and the compressive force when joined by the action of sugars such as cellulose and hemicellulose, the oil palm material W is almost free of voids and becomes a dense structure. It is water-resistant and has excellent waterproofing and insect-proofing properties, and even if used as a building material, it has a long service life.
In particular, hemicellulose has a function of binding lignin and cellulose, and it is unclear how much they interfere with each other when oil palm is naturally cultivated. However, it was confirmed that by raising the temperature to a predetermined temperature, for example, 80 ° C. or more of the reaction start temperature of lignin, the reaction start temperature of hemicellulose was 60 ° C. or more, and they reacted with each other to become firm characteristics.
What is necessary is just to arrange | position a net | network between the said oil palm materials, and to join a net | network between the said oil palm materials. In particular, the nets are joined and integrated between the oil palm materials, and the amount of the resin component and sugar component contained in the oil palm materials at the time of joining from the oil palm materials is different from that of the other. It is ensured without using any agent.

Since one or more metal laths M are arranged between the oil palm materials W, and one or more meshes are joined between the oil palm materials W, the nets are connected between the oil palm materials W. Since it joins and integrates, since the quantity of the resin component and sugar component which oil palm material W contains in the case of joining from between oil palm materials W is secured, without using other adhesives, It is easy to join the oil palm material W and the net, and even if the oil palm material W tries to bend, the net does not expand or contract corresponding to the bend, so it can be provided as means for preventing the bend. Moreover, it becomes difficult to bend with respect to the surface which laminated | stacked the said oil palm material by arrange | positioning a net | network in a several location.
Therefore, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that oil palm originally has is obtained.

The laminated plywood PW of the above embodiment is formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery with a rotary race while rotating it in the circumferential direction, and then compacting it. One or more oil palm materials W each having a length of 1 mm or more, and a lauan thin plate, a Chinese thin plate, or a coniferous thin plate in which a predetermined length of lauan or china or conifer trunk is formed in a plate shape in the length direction of the trunk One or more of them are arranged facing the oil palm material and joined together. A net is provided between the oil palm materials, and the net is joined between the oil palm materials.

Therefore, since one or more nets made of metal laths M are disposed between the oil palm materials W and one or more nets are joined between the oil palm materials W, the oil palm materials W are Since the nets are joined and integrated, the amount of the resin component and the sugar component contained in the oil palm material W at the time of joining from between the oil palm materials W is ensured without using other adhesives. Therefore, it is easy to join the oil palm material W and the net, and even if the oil palm material W tries to bend, the net does not expand or contract corresponding to the bend, so it can be provided as a means for preventing the bend. Moreover, it becomes difficult to produce a bending with respect to the surface which laminated | stacked the oil palm material W by arrange | positioning a net | network in a several location.
Therefore, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that oil palm originally has is obtained.

Also, at least one oil palm material W that has been compacted and one or more of Lauan thin plate, China thin plate, and softwood thin plate are placed facing the oil palm material W, and they are joined together. Therefore, when the resin component and the sugar component contained in the oil palm material W are insufficient, an adhesive is added and bonded to one or more of the Lawan thin plate, the China thin plate, and the conifer thin plate. Thus, a desired laminated plywood PW is manufactured. Therefore, since the adhesive is used when the resin component and the sugar component contained in the oil palm material W are insufficient, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, A laminated plywood PW utilizing the components it has is obtained.

The laminated plywood PW of the above embodiment is formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery with a rotary race while rotating it in the circumferential direction, and then compacting it. A lauan thin plate formed by peeling off a predetermined length of lauan trunk, china trunk, or conifer tree trunk from the outer periphery to a predetermined thickness with a rotary race while rotating at least one oil palm material W consisting of 1 mm or more, Alternatively, one or more of China thin plate or softwood thin plate is placed facing the oil palm material W, and they are joined together. It is premised on a thin plate formed by peeling off from the outer periphery to a predetermined thickness.
However, at least one of Lawan, Sina, or conifer is one or more of Lawan, Sina, or conifer, which has a predetermined length of Lauan or Sina or conifer tree trunks formed in a plate shape in the length direction of the trunk. It is also possible to arrange the plates facing the oil palm material and join them together.
At this time, the joint may be compressed as a position process of the consolidation process, or may be compression for joining separately from the consolidation process.

That is, the laminated plywood PW of the above embodiment is formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery with a rotary race while rotating the oil palm trunk WD in the circumferential direction, and then compacting it. Lauan, Sina, and conifers in which one or more oil palm materials W having a thickness of 1 mm or more and a trunk of other timber such as Lawan or Sina or conifers of a predetermined length are formed in a plate shape in the length direction of the trunk One or more pieces of wood such as the like can be arranged facing the oil palm material W, and they can be integrally joined.
Therefore, at least one compacted oil palm material W and one or more plates of lauan, china, conifer are arranged facing the oil palm material W, and they are joined together. Therefore, when the resin component and the sugar component contained in the oil palm material W are insufficient, it is desired to add an adhesive to one or more joining objects of Lauan, China, and conifers, The laminated plywood PW is obtained.
Therefore, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that oil palm originally has is obtained.

One or more oil palm materials W arranged facing the oil palm material W of the above-described embodiment and integrally joined, and one or more of the Lauan thin plate, the China thin plate, or the softwood thin plate are integrally joined. The laminated plywood PW sandwiched between the metal laths M1 and M2 is obtained by using a resin component and a sugar component contained in the oil palm material W for joining, compressing and fixing them, and joining them integrally.
Therefore, one or more oil palm materials W and one or more of Lauan thin plate, China thin plate, or softwood thin plate are used as laminated plywood PW, and sandwiched between the resin component and sugar component contained in oil palm material W. Since the metal lath M can be joined together, the use of a formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that the oil palm trunk WD originally has is obtained.

In order to join one or more oil palm materials W that are arranged facing the oil palm material W of the above embodiment and are integrally joined, a resin component and a sugar component contained in the oil palm material W are used. In addition to the resin component and sugar component contained in the oil palm material W, other adhesives are added to the joint surface that is integrally joined to one or more of the China thin plate or the softwood thin plate. For joining one or more oil palm materials W, resin components and sugar components contained in the oil palm material W are used, and furthermore, one or more of either lauan thin plate, china thin plate or softwood thin plate is firmly joined. Therefore, the use of a formaldehyde adhesive that causes sick house syndrome can be suppressed, and a laminated plywood PW using components inherently possessed by oil palm can be obtained.

The thin plate process is a process in which the oil palm trunk WD having the predetermined length according to the above embodiment is rotated in the circumferential direction and peeled with the blade CT to a predetermined thickness from the outer periphery with a rotary race to form the lauan thin plate and the oil palm material W. be able to. In addition, the process of drying the lauan thin plate and the oil palm material W may be the same process as the process of forming the lauan thin plate and the oil palm material W or may be a separate process, and this may be a drying process. it can.
The process of laminating the dried lauan thin plate and the oil palm material W in a predetermined state as the multilayer material NW before pressurization is usually used by laminating in units of 2 to 5 sheets. Specifically, it may be a lamination process of two or more sheets, and this can be used as a lamination process.
In particular, by reducing the number of lauan thin plates than the number of oil palm materials W, the use of formaldehyde-based adhesives that cause sick house syndrome is suppressed to 1/2 or less compared to at least conventional laminated plywood. Can do.

Since the net made of the metal laths M1 and M2 disposed between the oil palm materials W and joined between the oil palm materials W is a wire mesh, the molding temperature of the oil palm material W can be arbitrarily set. Also, the mechanical strength can be increased.

The net made of the metal lath M disposed between the oil palm materials W and joined between the oil palm materials W is a net of chemical fibers or plant fibers. Here, the net | network which consists of a chemical fiber or a vegetable fiber can make use of the net | network inconspicuous. Also, the mechanical strength is increased. In the case of chemical fibers, if they are joined at the joining temperature between the oil palm materials W and the melting temperature of the melting temperature of the chemical fibers, a strong integration is possible due to a synergistic effect.

Furthermore, in the step of heating to raise the temperature of the oil palm material W and the metal lath M, which are laminated after the laminating step, and if necessary, the temperature of the thin plate Y1, a step of introducing water vapor or electric heat and heating with a hot plate Can be a heating process since heating energy is supplied. Furthermore, a compressive force in a direction perpendicular to the surfaces of the thin plate Y1, the oil palm material W and the metal laths M1 and M2 with respect to the laminated thin plate Y1, the oil palm material W and the metal lath M heated by the heating step. The step of adding may be performed by compressing the thin plate Y1, the oil palm material W, and the metal lath M, that is, compressing the multilayer material NW before pressurization at a predetermined compression rate. This step can be a compression step.
In addition, after compressing for a predetermined time in the compression step, the temperature supplied in the heating step is lowered, the compression state of the laminated plywood PW is fixed, and the compression force compressed at a predetermined compression rate is released. This can be taken from the laminated plywood PW and used as an immobilization process.

As described above, the laminated plywood PW of the above-described embodiment is a plurality of oil palm materials W that are peeled off with a cutter CT from the outer periphery to a predetermined thickness with a rotary race while rotating the oil palm material W of a predetermined length in the circumferential direction. From the step S12 of laminating a plurality of the oil palm material W dried in the drying step, and the drying step consisting of the step S11 for drying the oil palm material W, and the oil palm material W formed in the predetermined step. A laminating step, a heating step comprising heating to increase the temperature of the lauan thin plate and oil palm material W laminated after the laminating step, and the laminated oil palm heated by the heating step. With respect to the surface of the oil palm material W while restricting the material W from extending in a direction parallel to the surface of the oil palm material W A compression step comprising step S17 of compressing for a predetermined time by applying an angular compression force, and a step of lowering and cooling and fixing the temperature supplied in the heating step after pressing for a predetermined time in the compression step The immobilization process which consists of S19 is comprised.

Therefore, since the oil palm trunk WD used in these steps has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness with a rotary race, a homogeneous oil palm material W is obtained, As a result, the laminated plywood PW made of the oil palm material W becomes homogeneous. In addition, since the bonding force can be changed by the action of resin components such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, depending on the applied temperature and compressive force, the control of the applied temperature and compressive force is possible. Arbitrary adhesive strength can be obtained. And, since the lauan thin plate and the oil palm material W are joined by the action of a resin component such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, the laminated plywood PW is formed. Since other synthetic resins and synthetic rubbers are not used as adhesives, they can be returned to nature without causing pollution problems. Furthermore, since the oil palm trunk WD itself contains a resin component such as lignin and the compressive force when joined by the action of sugars such as cellulose and hemicellulose, the oil palm material W is almost free of voids and becomes a dense structure. It is water-resistant and has excellent waterproofing and insect-proofing properties, and even if used as a building material, it has a long service life.

Manufacture of the laminated plywood of the said embodiment can be generalized as embodiment of the manufacturing method of a laminated plywood as follows.
A process of peeling the oil palm trunk WD of a predetermined length from the outer periphery to a predetermined thickness by a rotary race while rotating it in the circumferential direction with a blade CT to form a plurality of oil palm materials W and a trunk other than the oil palm of a predetermined length; For example, a thin plate process comprising step S10 comprising a step of rotating a lauan stem in the circumferential direction with a rotary race to a predetermined thickness from the outer periphery with a cutter CT and forming it into a thin plate such as a single lauan thin plate, and the thin plate Drying step consisting of step S11 for drying other thin plates such as oil palm material W and lauan thin plate formed in the process, and other thin plates such as oil palm material W and lauan thin plate dried in the drying step in a predetermined state And a plurality of other thin layers such as the oil palm material W and the lauan thin plate laminated after the lamination step. The heating process comprising step S16 for heating to increase the temperature of the oil palm material W and the other thin plates such as the laminar oil palm material W and lauan thin plate heated in the heating step, Compressive force in a direction perpendicular to the surfaces of other thin plates such as the oil palm material W and the cocoon thin plate Y1 while being restricted by the positioning holes 18 or the frame 20 from extending in the direction parallel to the surface of the other thin plates. The compression process comprising step S17 for compressing for a predetermined period of time, and the oil palm material W compressed in the compression process for a predetermined period of time and the other thin plates such as the cocoon thin plate Y1 are lowered in the heating process. The method for producing a laminated plywood comprising the immobilization step consisting of step S19 for immobilization.

Any one of the five lauan thin plates, the Chinese thin plate, or the coniferous thin plate in the laminating step of laminating the cocoon thin plate Y1, the oil palm material W, and the metal lath M that are dried in the drying step of the above-described embodiment. The frame 20 or the positioning hole 18 for positioning each side of the oil palm materials W2,..., W5, and the metal lath M is the frame 20 or the positioning hole 18 for regulating a predetermined loading surface, and a plurality of thin plates The upper and lower sides and the right and left sides of the W surface are restricted. Therefore, the thin plate W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and a thick portion and a thin portion are not generated depending on the position of the laminated plywood PW.

In the laminated plywood PW of the above embodiment, one thin plate W1 of the oil palm members W1,..., W5, which is a plurality of laminated ones, is any one of Lauan thin plate, China thin plate, or softwood thin plate other than the oil palm material W. One or more of Lauan thin plate, China thin plate or softwood thin plate other than the oil palm material W are joined together as a laminated plywood PW including the metal lath M. In this way, the laminated plywood PW including the metal lath M1 that integrally joins the oil palm materials W2,..., W5 in the joining composition of the oil palm materials W2,. By arranging one oil palm material W1 of the laminated thin plates W2,..., W5 as the cocoon thin plate Y1 other than the oil palm material W on the exposed surface on one side as shown in FIG. The thin plate Y1 can be joined with the adhesive ability of the oil palm materials W1,. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of the thin sheet Y1 and the oil palm material W of the above embodiment in a predetermined state, one or both end surfaces of one surface of the plural thin sheets Y1 and the oil palm material W laminated. Are made of wood other than the oil palm material W, etc., and are joined together as a laminated plywood PW including a thin plate other than the oil palm material W. Here, the oil palm material W can be 1 or more.
Of course, the wood other than the oil palm material W can be a thin plate Y1, or a Chinese thin plate or a coniferous thin plate in place of the thin plate Y1. Alternatively, one or a combination of the two can be used.

The drying process of step S11 of the method for manufacturing the laminated plywood according to the present embodiment is to dry the moisture content of the oil palm material W within a range of 10% to 30%, and since a net enters as an insert, cracks, Deformation, swelling, rupture, etc. are prevented. Therefore, more stable dimensional shape is ensured and the yield is high. Further, when the moisture content is in a dry state within the range of 10% to 30%, it is also suitable for joining with a Lauan thin plate, a Chinese thin plate, a conifer thin plate, or the like.

Since the heating temperature in the heating process of step S16 in the production of the laminated plywood of the present embodiment is in the range of 110 ° C. to 170 ° C., immobilization failure in the consolidation process, poor bonding between the woods, Material deterioration such as surface carbonization and lowering of material strength can be prevented. Further, when the heating temperature is in the range of 110 ° C. to 170 ° C., it is also suitable for joining a net, for example, a metal lath M and a lauan thin plate, a Chinese thin plate, a conifer thin plate, or the like.

In the production of the laminated plywood according to the present embodiment, the predetermined compression pressure in the compression process of step S17 is in the range of 1 to 100 kg / cm ² , so that immobilization failure or poor bonding between woods is caused in the consolidation process. Moreover, generation | occurrence | production of a surface crack can be prevented. It was confirmed that there was no problem in joining the lawan sheet, China sheet, conifer sheet and the net as an insert.

In the production of the laminated plywood according to the present embodiment, the time required for the heating process in step S16 and the compression process in step S17 is in the range of 10 minutes to 120 minutes. Bonding failure and carbonization of the surface can be prevented. It has been confirmed by the inventors' experiment that there is no problem in joining the lauan thin plate, the Chinese thin plate, the coniferous thin plate and the like to the net as an insert.
Furthermore, the composition that contributes to the consolidation of the oil palm base material W of the present embodiment includes resin components such as lignin and the cellulose, hemicellulose, etc., which the oil palm base material W made from the oil palm trunk WD having a predetermined length. The sugar component. In addition, although the inventors' analysis has recognized that the resin component such as lignin and the saccharide component such as cellulose and hemicellulose are the main compositions, the involvement of other components cannot be denied if the analysis ability is improved. Even if it is small, it cannot be denied that there may be other components that contribute to consolidation.

In addition, oil palm leaves, empty fruit bunches, roots, etc. are cut into chips and may be treated by an organic waste fermentation treatment method that is composted (composted) by aerobic bacterial treatment, The empty fruit bunch may be subjected to other practical treatments. Moreover, it can also grind | pulverize finely and can extract components, such as a cellulose, hemicellulose, and lignin, and it can also be used for integration of the metal lath M.

Claims

Heat while restricting extending in a parallel direction along the surface of the oil palm material comprising a plurality of laminated thin plates of a predetermined length, and a compressive force perpendicular to the surface of the laminated oil palm material After that, in the oil palm molded body formed by maintaining the compression and reducing the temperature to be consolidated,
An oil palm in which the laminated oil palm materials are stacked with their fiber directions intersecting each other so as to prevent the plurality of oil palm materials from being bent in a direction perpendicular to the surface thereof. Molded body.
Heat while restricting extending in a parallel direction along the surface of the oil palm material comprising a plurality of laminated thin plates of a predetermined length, and a compressive force perpendicular to the surface of the laminated oil palm material After that, in the oil palm molded body formed by maintaining the compression and reducing the temperature to be consolidated,
An oil palm molded body in which a plurality of the laminated oil palm materials are overlapped so that the plurality of oil palm materials are curved only in a direction perpendicular to a specific direction with respect to the surface.
3. The oil palm molded body according to claim 1, wherein at least one of a flat portion, a concave portion, and a convex portion is formed on the laminated oil palm material by a mold.
A thin plate step of peeling a predetermined length of oil palm trunk to a predetermined thickness in the circumferential direction to form a plurality of oil palm material thin plates,
A drying step of drying the oil palm material formed in the thin plate step;
A laminating step of laminating a plurality of oil palm materials dried in the drying step in a predetermined state;
A heating step of heating to raise the temperature of the oil palm material laminated in the lamination step;
While restricting the laminated oil palm material heated by the heating step from extending in a direction parallel to the surface of the oil palm material, the upper and lower molds of the oil palm material A compression process in which a compression force in a direction perpendicular to the surface is applied and compression molded for a predetermined time;
An oil palm comprising: an immobilization step of cooling and immobilizing the laminated oil palm material compressed in the compression step for a predetermined time by lowering a temperature supplied in the heating step. A method for producing a molded body.
A thin plate step of peeling a predetermined length of oil palm trunk to a predetermined thickness in the circumferential direction to form a plurality of oil palm material thin plates,
A drying step of drying the oil palm material formed in the thin plate step;
A laminating step of laminating a plurality of oil palm materials dried in the drying step in a predetermined state;
A preheating step of heating to raise the temperature of the oil palm material laminated in the laminating step;
While restricting extending in the parallel direction along the surface of the oil palm material to the laminated oil palm material heated by the preheating step, the upper and lower molds of the oil palm material A pre-compression process in which a compression force in a direction perpendicular to the surface is applied and compression-molded for a predetermined time;
A pre-fixing step of fixing the laminated oil palm material compression-molded for a predetermined time in the compression step by lowering the temperature supplied in the pre-heating step;
While restricting extending the laminated oil palm material fixed in the preliminary fixing step in a parallel direction along the surface of the laminated oil palm material under predetermined humidity and temperature conditions, a mold A compression force in a direction perpendicular to the surface of the laminated oil palm material is applied between the upper mold and the lower mold to perform compression molding for a predetermined time, and the temperature of the laminated oil palm material compressed for the predetermined time is set. A method for producing an oil palm molded body, comprising: a main immobilization step of lowering and immobilizing.
An oil palm material comprising a plurality of thin plates formed by peeling a trunk of a predetermined length of oil palm to a predetermined thickness in the circumferential direction;
It is arranged between the oil palm materials, and comprises a net joined between the oil palm materials,
The net is disposed between the oil palm materials, and is compacted using a resin component and a sugar component contained in the oil palm material, and the oil palm material and the net are joined together. Laminated plywood.
An oil palm material comprising a plurality of thin plates formed by peeling a trunk of a predetermined length of oil palm to a predetermined thickness in the circumferential direction;
A net disposed between the oil palm materials and joined between the oil palm materials,
One or more of Lauan thin plate, Chinese thin plate or coniferous thin plate formed by peeling a predetermined length of Lauan or Sina or conifer trunk to a predetermined thickness in the circumferential direction is arranged facing the oil palm material. Then, they are consolidated using a resin component and a sugar component contained in the oil palm material, and are integrally bonded.
An oil palm material made of a plurality of thin plates each having a thickness of 1 mm or more after being formed by peeling a trunk of a predetermined length of oil palm to a predetermined thickness in the circumferential direction,
A net disposed between the oil palm materials and joined between the oil palm materials,
One or more of Lauan, China, or conifers having a predetermined length of Lauan or Sina or coniferous tree formed in a plate shape in the length direction of the trunk are arranged facing the oil palm material, A laminated plywood characterized in that it is consolidated using a resin component and a sugar component contained in an oil palm material and joined together.
The oil palm material that is disposed facing the oil palm material and joined together is a resin component and a sugar component contained in the oil palm material, and either Lauan thin plate, China thin plate or softwood thin plate 9. A bonding surface that is integrally bonded to one or more of the above-mentioned sheets is provided with another adhesive in addition to the resin component and the sugar component contained in the oil palm material. Laminated plywood as described in 1.
The laminated plywood according to any one of claims 6 to 9, wherein the number of the oil palm materials is larger than the number of thin plates other than the oil palm materials.
The laminated plywood according to any one of claims 6 to 10, wherein a mesh disposed between the oil palm materials and joined between the oil palm materials is a wire mesh.
12. The net according to claim 6, wherein the net disposed between the oil palm materials and joined between the oil palm materials is a net of chemical fibers or plant fibers. Laminated plywood.