KR20170097271A - System for Manufacturing Synthetic Wood Containing Phytoncide And Method for Manufacturing the Synthetic Wood Using the Same - Google Patents

Abstract

The present invention relates to a manufacturing system capable of producing an environmentally friendly synthetic wood which is obtained by mixing a thermoplastic resin, a foaming agent, etc. with a fiber-based powder such as vegetable fiber or wood fiber, The present invention relates to a method for producing a synthetic wood using the same, and a system for producing a lightweight synthetic wood according to the present invention is a system for producing a lightweight synthetic wood by supplying at least one powdery raw material selected from pine nut powder or mixed powder obtained by mixing pine nut powder with a fiber- A main feeder; A plurality of additive material feeders for feeding an additive material including a thermoplastic resin and a foaming agent; A mixer for mixing the main raw material supplied from the main raw material feeder and the additive material supplied from the additive material feeder while heating the mixed raw material and a cooling mixer for producing a powdered material by cooling the mixture at a predetermined temperature or lower, A material blending part including: A foaming extruder for heating and melting and foaming the powder material transferred from the cooling blender; A foaming mold having a foaming chamber heated while passing the extrudate extruded from the foaming extruder; A molding chamber having a molding chamber in which a foaming material mixture that has passed through the front end of the foaming chamber and is foamed passes through and is molded into synthetic wood; A cooler for cooling the synthetic wood extruded from the sizing mold; An extractor for forwarding the synthetic wood at a predetermined speed; And a cutter for cutting the synthetic wood to a predetermined length.

Description

TECHNICAL FIELD The present invention relates to a system for manufacturing synthetic wood containing phytoncide and a method for manufacturing synthetic wood using the synthetic wood,

The present invention relates to a system for producing synthetic wood, and more particularly, to a system for producing synthetic wood, which comprises mixing a thermoplastic resin and a foaming agent in a fiber-based powder containing pomegranate powder, To a manufacturing system capable of manufacturing an environmentally friendly and lightweight synthetic wood, and a method of manufacturing synthetic wood using the same.

Generally, wood is used as flooring material for various kinds of facilities such as leisure, sports, landscape, etc., as well as construction, but also for cargo vehicles and containers. However, cracks and cracks frequently occur due to deformation and corrosion due to natural environment such as moisture and solar heat, .

In addition, since wood has high water content and high water absorption, development of technology for lightening synthetic wood and development of technology for lowering moisture content is continuing, but the lighter the wood, the higher the moisture content causes the problem of product durability due to moisture.

In order to solve the above-mentioned problem, the plastic is used as a substitute for wood. However, since the texture and dimensional stability of the plastic itself are poor, there is a limit to use as a substitute for wood, and since such a plastic has little decomposability, Is being reduced.

In recent years, synthetic wood has been developed to solve problems related to wood and plastic products. Such synthetic wood is usually produced by kneading a synthetic resin such as polyethylene, polyvinyl chloride, polypropylene, polyester, etc., inorganic powder such as wood powder, walnut shell, reed powder, etc. with a filling material and hot extrusion molding to produce synthetic wood.

However, the conventional synthetic wood is heavy, and the shrinkage and expansion rate according to the temperature change of the four seasons are high, so that the parts joining the legs and the deck (such as the joining parts of the synthetic wood and the pipes directly connected to each other) are easily broken, There is a problem exposed to safety accidents.

In order to solve this problem, Patent No. 10-1283502 discloses a method of coating wood pulp or rice hull with a resin and a gelling agent in order to express the texture of wood, and a thermally expandable foaming agent in which a liquid low-boiling hydrocarbon is put into a thermoplastic polymer shell A synthetic wood capable of minimizing the water content by forming the foamed shell with independent bubbles is disclosed, which is excellent in expandability and can be made lighter by allowing the foam to be produced by using a shell.

The synthetic wood of the above patent and the method for producing the same are developed by the present applicant and can be made lightweight by being excellent in expandability. The foaming agent shell can form a closed cell to lower the water content, It is possible to control the amount of the foaming agent and the blending ratio according to the size of the molded product, thereby achieving an excellent effect that the specific gravity can be lowered under the optimum molding conditions.

However, the synthetic wood disclosed in the above-mentioned patent has a disadvantage that it is discolored due to ultraviolet rays and time lapse and detracts from aesthetics.

Registration No. 10-1283502 (Registered on July 2, 2013) Registration No. 10-0720934 (registered on May 16, 2007) Registration No. 10-1432739 (registered on April 14, 2014)

Accordingly, the present invention provides a synthetic wood which is light in weight and has excellent strength that is not easily broken by impact, emits a fragrance such as a soapy aroma containing phytoncide and can maintain its original color without being discolored over time And a method for manufacturing a synthetic wood using the same.

According to another aspect of the present invention, there is provided a synthetic wood manufacturing system comprising: a main raw material feeder for feeding at least one raw material powder selected from pine nut powder or mixed powder obtained by mixing pine nut powder with a fibrous powder; A plurality of additive material feeders for feeding an additive material including a thermoplastic resin and a foaming agent; A mixer for mixing the main raw material supplied from the main raw material feeder and the additive material supplied from the additive material feeder while heating the mixed raw material and a cooling mixer for producing a powdered material by cooling the mixture at a predetermined temperature or lower, A material blending part including: A foaming extruder for heating and melting and foaming the powder material transferred from the cooling blender; And a foaming chamber heated by passing the extruded material from the foaming extruder, wherein the foaming chamber has a cross-sectional area smaller than a cross-sectional area of the finally produced synthetic wood; A molding chamber disposed at a predetermined distance in front of the foam mold, the molding chamber being formed of synthetic wood while passing through the foam of the raw material mixture passed through the front end of the foam chamber; A cooler disposed in front of the sizing mold to cool the synthetic wood extruded from the sizing mold; An extractor disposed in front of the cooler for conveying the synthetic wood forward at a constant speed; And a cutter disposed in front of the drawer for cutting the synthetic wood to a predetermined length.

The method of manufacturing synthetic wood using the synthetic wood manufacturing system of the present invention as described above,

(a) mixing and heating an additive material comprising a thermoplastic resin and a raw material of any one or more powders selected from a pine nut powder or a mixed powder obtained by mixing a pine nut powder with a fiber-based powder;

(b) cooling the raw material mixture of the main raw material and the additive material mixed in the step (a) and pulverizing the raw material mixture to prepare a synthetic material powder;

(c) transferring the powdered synthetic powder material to a foam extruder and supplying the powdered synthetic powder material;

(d) heating and melting and foaming the synthetic powder material in a foam extruder;

(e) injecting extruded material from the foam extruder into a foaming chamber of a foaming mold and heating the extrudate;

(f) injecting foamed foam while being drawn out of the foam chamber into a molding chamber of a sizing mold and heating;

(g) cooling the synthetic wood drawn from the molding chamber of the sizing mold;

(h) cutting the cooled synthetic wood to a predetermined length;

And a control unit.

According to the present invention, since a raw material mixture containing a main raw material containing a fiber-based powder, an additive material including a thermoplastic resin, a foaming agent, and a pigment is continuously extruded and foamed while moving, There is an effect.

Particularly, the present invention provides a method of manufacturing a poultry meal by mixing materials containing poultice husk powder at a predetermined mixing ratio and then foam-molding to increase the maximum flexural load. Since it has a lower density than conventional synthetic wood, It is possible to produce a synthetic wood which can maintain the original color without discoloration even after the lapse of the time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the construction of a synthetic wood manufacturing system according to an embodiment of the present invention; FIG.
2 is a cross-sectional view showing a configuration of a foam extruder of the synthetic wood manufacturing system shown in FIG.
FIG. 3A is a side view showing the configuration of a foam mold and a sizing mold of the synthetic wood manufacturing system shown in FIG. 1. FIG.
FIG. 3B is a front view of the foaming mold of FIG. 3A.
4A is a side view showing the construction of the cooler of the synthetic wood manufacturing system shown in FIG.
FIG. 4B is a plan view showing a part of the structure of the cooler of FIG. 4A. FIG.
Fig. 5 is a side view showing the structure of an extractor of the synthetic wood manufacturing system shown in Fig. 1. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a system for manufacturing a synthetic wood according to the present invention and a method for producing synthetic wood using the same will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, a synthetic wood manufacturing system according to an embodiment of the present invention includes a mixed powder made by mixing pine nut powder into a fiber-based powder such as wood powder or rice hull, reed (eg, ash), walnut shell powder, (2) for supplying an additive material including a thermoplastic resin and a foaming agent, a main raw material feeder (1) for feeding the main raw material and the additive raw material feeder A cooling mixer 3b for supplying the melted mixture in the melting mixer 3a and cooling the melted mixture to a predetermined temperature or lower to form a powdered material, A foam extruder 4 for heating and melting and foaming the powder material conveyed from the cooling mixer 3b and a foaming chamber 51 for heating while passing the extrudate extruded from the foam extruder 4, , A sizing mold (6) arranged at a distance from the front of the foaming mold (5) to form a synthetic wood in a shape corresponding to the final product, A cooling device 7 disposed in front of the cooling device 6 for cooling the synthetic wood material extruded from the sizing mold 6 and a cooling device 7 disposed forward of the cooling device 7 for forwarding the synthetic wood material 10 at a constant speed And a cutter 9 disposed in front of the drawer 8 for cutting the synthetic wood 10 to a predetermined length.

The foam extruder 4 and the foam mold 5, the sizing mold 6, the cooler 7, the extruder 8 and the cutter 9 are arranged in-line to form a synthetic wood (Including the raw material mixture and the foam before being molded) is transferred at a constant speed in one direction to produce a synthetic wood.

Although not shown in the drawing, the above-described components are controlled by a controller. For example, the controller controls the degree of foaming by controlling the temperatures of the foam extruder 4 and the foam mold 5 and the degree of gas discharge, and controls the speed of the extruder 8 to control the conveying speed of the synthetic wood do.

The synthetic wood production system of the present invention is also suitable for producing lightweight synthetic wood as disclosed in the present applicant's registered patent No. 10-1283502, but it can be applied to manufacture various lightweight synthetic wood by mixing various raw materials. For example, PVC resin and foaming agent, an iron oxide composite pigment which does not discolor when brought into contact with oxygen in the air, and other additives, etc. are added to at least one powdery material selected from pomegranate powder or mixed powder obtained by mixing pine nut powder with fibrous powder Can be mixed to produce lightweight synthetic wood with low density and high strength.

The main raw material feeder 1 is formed by heating and pulverizing fiber-based powders such as wood powder or chaff, processed reeds (reeds) and walnut shell powder processed and dried at a particle size of 40 to 100 mesh at a high temperature and high pressure of 100 to 220 ° C The mixed powder made by mixing the pine nut powder is stored in the fibrous powder in which the needle-shaped structure on the surface is broken, and the mixed powder is weighed by a predetermined amount and supplied to the melt blending machine (3a).

The plurality of additive material feeder (2) includes a polyvinyl chloride (PVC) resin as a thermoplastic resin, a filler, a processing aid for activating the PVC resin, an impact modifier, a stabilizer, a lubricant, a foaming agent, (Fe ₂ O ₃ ) pigment and the like as non-discolored pigments which are no longer discolored due to oxidation and no longer being oxidized even when they are reacted with each other. The iron oxide (Fe ₂ O ₃ ) pigment and the like are metered by a predetermined amount and supplied to the melt blending machine (3a).

Examples of the thermoplastic resin supplied from the additive material feeder 2 include polyolefins, ethylene copolymers obtained by copolymerization of ethylene and polar monomers, chlorinated polyvinyl chloride, polystyrene, and acrylobutadiene styrene resin (ABS (polyvinyl chloride) Resin) may be used alone or in admixture of two or more. Preferably, the thermoplastic resin is in the form of a powder, and more preferably, the thermoplastic resin is pulverized and mixed in a powder form, wherein the powder has a particle size of 80 to 150 mesh. The thermoplastic resin may be selected from the group consisting of polyethylene terephthalate (PET), polyethylene resin, polyproplene resin, polystyrene resin, polyamide resin, acrylic resin ), A vinyl chloride resin, and a celluloid resin may be used.

The foaming agent may be a thermally expandable foaming shell in which a liquid low boiling point hydrocarbon is placed in a thermoplastic polymer shell. By heating the foaming agent shell, the polymer shell is softened, the liquid hydrocarbon contained therein is changed into a gas, It is expanded into a hollow molecule 50 to 100 times its volume. At this time, the foaming agent shell can form a closed cell, thereby making it possible to reduce the weight and provide an advantage that the water content can be minimized. In addition, since the foaming agent shell can form a closed cell after foaming, it can be lightened, and the specific gravity and water content of the product can be lowered.

The iron oxide pigment acts as a non-discolored pigment which remains in the hue even if it is in contact with oxygen in the air. The iron oxide pigments may be used in combination with carbon black. It is preferable to use the iron oxide having a particle size of 40 to 45 탆 through a powder process using a ball mill. If the size of the iron oxide is larger than 45 탆, it is difficult to develop a desired color after coloring. If the size of the iron oxide is smaller than 40 탆, the coloring effect is hardly improved and processing is difficult. Therefore, the particle size of the iron oxide is preferably limited to 40 to 45 mu m.

In addition, iron oxide pigments have strong acidity, which can affect durability and strength. Therefore, it is preferable to use iron oxide which is neutralized to pH 5 to 7 by mixing calcium hydroxide in the powder process. The slaked lime is preferably added in an amount of 0.04 to 0.06% by weight based on the iron oxide.

The main raw material supplied from the main raw material feeder 1 and the additive raw material supplied from the additive material feeder 2 are stirred and melted while being heated to a temperature range of 100 to 130 캜.

The cooling mixer 3b is disposed on one side of the melt mixer 3a so that the melted mixture is supplied to the melt mixer 3a and cooled to a predetermined temperature, do.

The powdered material (synthetic powder material) cooled in the cooling mixer 3b is conveyed to the foam extruder 4 by compressed air injected through a pipe connecting the cooling mixer 3b and the foam extruder 4 .

2, the foam extruder 4 is provided with a cylinder 41 in which heaters 43 for heating a material are arranged in multiple stages along the longitudinal direction, A plurality of screws 42 are provided so as to be rotatable. In the inside of the foam extruder 4, melting and foaming of the material progresses sequentially. The cylinder 41 of the foam extruder 4 is formed so that a gas outlet 44 for discharging gas generated in the process of melting and foaming the material to the outside is communicated to the outside.

At the front end of the foam extruder (4), an adapter (45) for compressing the extrudate to be extruded at high pressure is provided. The adapter 45 is provided with a push-out port 46 whose inner diameter decreases toward the front, so that the extrudate can be injected into the foaming mold 5 in a compressed state at a high pressure.

3A and 3B, the foam metal mold 5 includes a foam chamber 51 for receiving the gel-like raw material mixture 10a supplied from the melt blender 3a and molding the gel-like raw material mixture 10a into a shape substantially corresponding to the synthetic wood Respectively. The foam chamber 51 is formed to extend from a front end portion to a rear end portion of the foam metal mold 5 and has a substantially rectangular chamber shape having a front face opened. The foam chamber 51 has a rectangular cross section corresponding to the cross section of the finally produced synthetic wood and has a cross sectional area smaller than the cross sectional area of the synthetic wood. The rear end of the foam chamber 51 communicates with an adapter 45 connected to the front end of the foam extruder 4 and is supplied with a gel-like raw material mixture compressed at a high pressure.

The outlet of the front end of the foaming chamber 51 may have a rectangular shape having a uniform overall height. However, as shown in FIG. 3B, it is preferable that the height of the center portion is lower than the height of both side portions. This is because the central portion of the foamed body 10b that is drawn out through the front end portion of the foam chamber 51 is relatively more foamed than the opposite side portions thereof. Therefore, if the outlet of the foam chamber 51 has the same overall height, The corner portions of both ends of the synthetic wood 10 are not bent at right angles even if they pass through the sizing mold 6. [ 3B, if the central portion of the outlet portion of the front end portion of the foaming chamber 51 is formed to be lower in height than the both side portions, the central portion of the foam body 10b drawn through the front end portion of the foaming chamber 51, Are uniformly aligned so that both end edges are formed nearly at right angles to each other.

The foam metal mold 5 includes an electro-thermal heater (not shown) for heating the material inside the foaming chamber 51.

Referring to FIGS. 1 and 3A, the sizing mold 6 is disposed at a distance from the front of the foam metal mold 5. The sizing mold 6 has a molding chamber 10a which is passed through the front end of the foaming chamber 51 and is foamed and passed through the foam 10b to be molded into a synthetic wood 10. The molding chamber 10a is open in the front-rear direction and has a rectangular cross-sectional shape of a predetermined size and shape from the front end portion to the rear end portion. The molding chamber 10a has a cross-sectional shape and a size corresponding to the final product shape of the synthetic wood, and the concavity and convexity can be formed in the longitudinal direction on the upper surface so as to give a texture of the wood.

The size of the cross-sectional area of the foaming chamber 51 is preferably 70 to 90% of the size of the cross-sectional area of the molding chamber 10a. More preferably, the size of the cross- Of the cross-sectional area of the cross-sectional area.

The sizing mold 6 also has an electro-thermal heater (not shown) similar to the foam metal mold 5.

Referring to FIGS. 4A and 4B, the cooler 7 is configured to perform a function of providing cooling water to the heated synthetic wood while passing through the foam metal mold 5 and the sizing metal mold 6 to cool the same. In this embodiment, the cooler 7 includes a cooling water supply unit 71 for supplying cooling water to the synthetic wood 10, and a cooling water supply unit 71 for cooling water supplied through the hose 71a of the cooling water supply unit 71. [ (70) horizontally installed on a moving path of the synthetic wood (10) in front of the cooling water tank (72) and spraying compressed air toward the synthetic wood (10) And an air blower 73 for removing water from the wood 10.

The cooling water tank 72 is cooled so that the synthetic wood 10 heated to a high temperature is immersed in the cooling water in the cooling water tank 72 so that the synthetic wood 10 is kept at a level enough to be completely immersed.

The air blower 73 performs a function of pushing the cooling water remaining in the synthetic wood 10 backward to remove the synthetic wood 10 and drying the synthetic wood 10. In this embodiment, Are arranged to cross the upper side and the lower side of the wood (10), respectively. The upper and lower air blowers 73 are preferably inclined at a predetermined angle in the forward and backward directions on the upper and lower sides of the movement path of the synthetic wood 10 and are provided with ejection openings 74 Are cut along the longitudinal direction. If the air blower 73 is inclined at a predetermined angle in the front-rear direction, the cooling water present on the upper and lower surfaces of the synthetic wood 10 can be smoothly pushed rearward to improve the drying performance.

Further, the jetting port 74 is configured to jet compressed air in a direction inclined rearward, so that the moisture on the synthetic wood 10 is pushed backward and dried.

5, the drawer 8 is configured to perform the function of conveying the synthetic wood 10 at a predetermined speed in front of the cooler 7, in this embodiment, the drawer 8, Frames 81 and 82 provided above and below the movement path of the synthetic wood 10 in front of the cooler 7 and a frame 81 and 82 installed to rotate at a constant speed in the forward and backward directions An upper endless track 83 and a lower endless track 84 for contacting the upper and lower surfaces of the synthetic wood 10 and pushing the synthetic wood 10 forward, And a trajectory drive unit for rotating the lower endless track 84 at a constant speed.

The upper endless track 83 and the lower endless track 84 are formed such that a plurality of rectangular synthetic resin plates 86 are rotated relative to each other by a 'U' shaped connecting bracket 87 made of a metal Thereby forming an infinite orbit structure. The upper endless track 83 and the lower endless track 84 are wound on two pulleys 83a and 84a that are rotatably provided at the front end and the rear end of the frames 81 and 82 so that the pulleys 83a and 84a Is rotated clockwise or counterclockwise as one of them is rotated by the track driving unit, the synthetic wood 10 is forwardly transported at a constant speed.

Although not shown in the drawings, the orbiting drive unit may be constituted by an electric motor and a power transmitting mechanism such as a gear or a belt for transmitting the rotational force of the electric motor to one of the pulleys 83a and 84a.

Since the ejector 8 has an endless track structure, a uniform force can be applied to the upper surface and the lower surface of the synthetic wood 10 over a wide area, thereby preventing the synthetic wood 10 from being deformed or damaged So that the synthetic wood 10 can be forwardly fed at a constant speed.

The rear end of the drawer 8 is provided with two guide rods (not shown) for guiding the position of the synthetic wood 10 precisely while contacting both ends of the synthetic wood 10 passing through the cooler 7 and entering the drawer 8 85 are freely rotatable.

The cutter 9 cuts the finished synthetic wood 10 through the take-out machine 8 by a designated length. The cutter 9 can be constructed using a known cutter.

Although not shown in the drawings, a sanding brush may be additionally provided between the take-out machine 8 and the cutter 9 for polishing the upper surface of the synthetic wood 10 while rotating to impart texture to the wood.

A method of manufacturing a synthetic wood using the synthetic wood manufacturing system of the present invention will be described in detail.

First, fibrous powder such as wood flour, rice cake, and walnut shell powder is washed with water, pulverized to a particle size of 40 to 100 mesh, and the fibrous powder made by breaking the needle-like structure under high temperature and high pressure is mixed with pine nut powder The main raw material made of the mixed powder is stored in the main raw material feeder 1 and is fed to each of the plurality of additive material feeders 2 by the use of PVC resin, filler, processing aid, impact modifier, stabilizer, lubricant, Pigment and the like.

Then, the main raw material of the raw material feeder 1 and the additive materials of the additive material feeder 2 are weighed in a predetermined amount and put into the melt blender 3a to mix.

In the melt blending machine (3a), the charged mixture is heated and stirred while being heated to a temperature range of 100 to 130 ° C to produce a gel-like raw material mixture.

The raw material mixture of the melt blending machine 3a is conveyed to the installed cooling blender 3b and stirred in the cooling blender 3b at a temperature of 60 DEG C or lower for about 30 minutes to prepare a synthetic powder material .

The synthetic powder material produced in the cooling mixer 3b is conveyed along the pipe by the high-pressure compressed air and fed to the foam extruder 4. [

The synthetic powder material supplied into the foam extruder 4 is heated and melted and foamed by the heater 43 while being gradually transferred forward by the screw 42 inside the cylinder 41 of the foam extruder 4. [

The material melted and foamed in the foam extruder 4 is compressed at a high pressure while passing through the adapter 45 and flows into the foaming chamber 51 of the foaming mold 5 at the front. The extrudate introduced into the foaming chamber 51 is heated while moving at a constant speed in the foaming chamber 51. The extrudate of the foam chamber 51 and the foam 10b between the foam metal mold 5 and the sizing metal mold 6 and the synthetic wood 10 in the molding chamber 10a and the cooler 7 and the extruder 8 Since the synthetic wood 10 is connected to each other, the material mixture in the foaming chamber 51 also moves at a constant speed as the extruder 8 transfers the synthetic wood 10 at a constant speed.

The heated gel-like extrudate moving along the inside of the foaming chamber 51 passes through the front end of the foaming chamber 51, expands to the atmosphere, and expands to a size approximately equal to the size of the final synthetic wood product. At this time, since the height of the central portion of the foaming chamber 51, which has a relatively large amount of foaming, is relatively lower than the height of both side portions, the foaming progresses while the material is pushed in both directions in the foaming process, So that the four corner portions of both ends can be formed at right angles.

The amount of expansion of the foamed product 10b that has passed through the foam chamber 51 can be adjusted by controlling the temperature of the foam extruder 4. [ That is, when the expansion amount is to be increased, the temperature of the foam extruder 4 is raised, and when the expansion amount is to be decreased, the temperature of the foam extruder 4 is lowered.

The expanded foam 10b passing through the foam chamber 51 enters the molding chamber 10a of the preceding sizing mold 6 and is formed into the same shape and size as the final synthetic wood product.

The synthetic wood 10 formed in the same shape as the final product while passing through the molding chamber 10a of the sizing mold 6 is cooled by the cooling water while passing through the cooling water tank 72 of the cooler 7, , The cooling water is removed by the compressed air injected from the lower air blower 73 and dried.

The synthetic wood 10 having passed through the cooler 7 is moved forward while passing between the upper endless track 83 and the lower endless track 84 of the drawer 8, Lt; / RTI >

The synthetic wood according to the present invention produced by the extrusion molding method as described above is manufactured through a foaming process. In particular, the foaming agent is foamed using a thermally expandable foaming shell in which a liquid low-boiling hydrocarbon is placed in a thermoplastic polymer shell. Can be made lightweight, and the foaming agent shell can form closed cells to lower the water content to less than 8%.

The synthetic wood according to the present invention made through the foaming process has a density of the center portion lower than that of the outer portion based on the cross section.

Further, since the foamed synthetic wood of the present invention is made by mixing an iron oxide pigment having a particle size of 40 to 45 μm and mixed with slaked lime and adjusting the pH to 5 to 7, the original color can be maintained without discoloring even after a long period of time .

In the synthetic wood manufacturing system of the present invention, the raw material mixture containing the main raw material including the fibrous powder and the additive material including the thermoplastic resin is continuously extruded and foam-molded while moving, so that a lightweight synthetic wood with excellent performance is mass- There is an effect that can be.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be determined by the appended claims, as well as the appended claims.

1: main feeder 2: additive feeder
3a: Melting blender 3b: Cooling blender
4: foaming extruder 41: cylinder
42: screw 43: heater
45: Adapter 46: Extrusion port
5: Foam mold 51: Foam chamber
6: Sizing mold 61: Molding chamber
7: cooler 71: cooling water supply unit
72: Cooling water tank 73: Air blower
8: an ATM 81, 82: a frame
83: upper endless track 84: lower endless track
9: Cutter 10: Synthetic wood
10b: Foam

Claims (11)

A raw material feeder (1) for feeding at least one powdery raw material selected from poultry powder or mixed powder obtained by mixing poultice powder with a fiber-based powder;
A plurality of additive material feeders (2) for feeding additive materials including a thermoplastic resin and a foaming agent;
A molten blender 3a for heating while mixing the main raw material supplied from the main raw material feeder 1 and the additive material supplied from the additive material feeder 2; (3b) for cooling the powdered material to form a powdered material;
A foam extruder 4 for heating and melting and foaming the powder material transferred from the cooling mixer 3b;
And a foaming chamber 51 heated by passing the extrudate extruded from the foam extruder 4. The foaming chamber 51 has a foaming mold 5 having a sectional area smaller than the sectional area of the finally produced synthetic wood, Wow;
A molding chamber 10a which is arranged at a predetermined distance in front of the foam metal mold 5 and which is passed through the front end of the foam chamber 51 and is foamed and passes through the foam 10b of the raw material mixture, (6);
A cooler 7 disposed in front of the sizing mold 6 to cool the synthetic wood extruded from the sizing mold 6;
An extractor (8) arranged in front of the cooler (7) for transferring the synthetic wood (10) forward at a constant speed;
A cutter 9 disposed in front of the drawer 8 for cutting the synthetic wood 10 to a predetermined length;
Wherein the composite wood is manufactured by a method comprising the steps of: The system of claim 1, wherein the size of the cross-sectional area of the foaming chamber (51) is 70-90% of the size of the cross-sectional area of the molding chamber (10a). The cooling device according to claim 1, wherein the cooler (7) comprises a cooling water tank (71) in which cooling water is stored while the synthetic wood (10) And an air blower (73) installed to remove water of the synthetic wood (10) by spraying compressed air toward the synthetic wood (10). The air conditioner according to claim 3, wherein the air blower (73) is horizontally installed so as to cross the upper and lower sides of the movement path of the synthetic wood (10), and each of the air blowers (73) And a jetting port (74) for jetting compressed air is formed in a lower end or an upper end of the air blower (73) so as to be cut along the longitudinal direction. The frame according to claim 1, wherein the ejector (8) comprises frames (81, 82) provided above and below the movement path of the synthetic wood (10) An upper endless track 83 and a lower endless track 84 which are installed to rotate at a constant speed in a direction of the synthetic wood 10 and contact the upper and lower surfaces of the synthetic wood 10 to push the synthetic wood 10 forward, And a track driving unit for rotating the upper endless track (83) and the lower endless track (84) at a constant speed. 6. The apparatus according to claim 5, wherein the upper endless track (83) and the lower endless track (84) are formed such that a plurality of rectangular synthetic resin plates (86) are connected to each other by a U- Wherein the first and second wheels are rotatably connected to each other to form an endless track structure. The synthetic wood manufacturing system according to claim 1, wherein the front end portion of the foam chamber (51) is lower in height than the side portions at the center portion. The extruder according to claim 1, further comprising a push-out port (46) provided between the front end of the foam extruder (4) and the foaming mold (5) Further comprising an adapter (45) for compressing the extrudate and injecting it into the foaming mold (5). 9. A method for producing synthetic wood using a synthetic wood manufacturing system according to any one of claims 1 to 8,
(a) mixing and heating an additive material comprising a thermoplastic resin and a raw material of any one or more powders selected from a pine nut powder or a mixed powder obtained by mixing a pine nut powder with a fiber-based powder;
(b) cooling the raw material mixture of the main raw material and the additive material mixed in the step (a) and pulverizing the raw material mixture to prepare a synthetic material powder;
(c) transferring the powdered synthetic powder material to a foam extruder and supplying the powdered synthetic powder material;
(d) heating and melting and foaming the synthetic powder material in a foam extruder;
(e) injecting the extrudate extruded from the foam extruder (4) into the foaming chamber (51) of the foaming mold (5) and heating the same;
(f) injecting foamed foam 10b while being drawn out of the foam chamber 51 into a molding chamber 10a of a sizing mold 6 and heating the same;
(g) cooling the synthetic wood drawn from the molding chamber 10a of the sizing mold 6; And,
(h) cutting the cooled synthetic wood to a predetermined length;
≪ / RTI > [10] The method of claim 9, wherein in step (c), compressed air is sprayed through a pipe connecting the cooling blender and the foam extruder to transfer the synthetic powder material. The method as claimed in claim 9, wherein the step (g) comprises the steps of cooling the synthetic wood through a cooling water tank having cooling water stored therein, and spraying compressed air to the synthetic wood in front of the cooling water tank, Wherein the method comprises the steps of:

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