JP3516900B2 - Method for producing pulp molded article - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pulp mold molded body and a papermaking apparatus used in the manufacturing method.

[0002]

2. Description of the Related Art As a conventional technique relating to a method for producing a pulp molded body, the technique described in Japanese Patent Application Laid-Open No. 9-119100 is known. This technique involves immersing a papermaking mold equipped with a suction passage in a liquid tank filled with high-temperature pulp slurry, sucking the pulp slurry through the suction passage to form a molded body, and then performing a dehydration step of the molded body. This is to reduce the time.

However, when a high temperature pulp slurry is supplied from the initial stage of papermaking for papermaking, energy cost is required, and the fluidity of the pulp slurry becomes too high, so that a surface layer on which a wet compact is formed is formed. There has been a problem that the thickness of the resulting molded product is likely to be uneven due to disturbance of the flow of pulp slurry. In addition, the desired effect obtained by adding an additive such as a coloring pigment or a sizing agent may not be obtained, and particularly when a coloring pigment is added, color unevenness may occur on the outer surface of the molded body formed in the early stage of papermaking. There was a problem that caused.

Therefore, the object of the present invention is to reduce the energy cost, to suppress the unevenness of the wall thickness of the molded product, and to manufacture the pulp mold molded product without impairing the effect of adding the additives. An object of the present invention is to provide a method for manufacturing a pulp molded body and a papermaking apparatus used for the manufacturing method.

[0005]

According to the present invention, a pulp slurry is supplied to a papermaking surface of a papermaking type having a suction passage, and the pulp slurry is sucked through the suction passage to deposit pulp on the papermaking surface. A papermaking process for forming a wet compact
In the method for producing a pulp mold molded body, which comprises a dehydration step of dehydrating the wet molded body formed in the papermaking step, the pulp slurry in the cavity of the papermaking mold.
The cavitation during deposition of the pulp to the papermaking surface of the
The heating fluid is added to the pulp slurry in I Luke or the
The pulp slurry is heated by a heater placed in the cavity.
The above object is achieved by providing a method for producing a pulp mold molded body, which comprises heating the pulp slurry to raise the temperature of the pulp slurry.

Further, the present invention is a papermaking apparatus order used in the production method of the pulp molded article according to claim 1, a paper making type in which a suction passage, a pulp slurry to the paper surface of該抄paper type Means for supplying the pulp slurry, a suction means for sucking the pulp slurry supplied by the supplying means, and a heating fluid to the supplied pulp slurry.
Or heat the pulp slurry with a heater
The above object is achieved by providing a papermaking apparatus provided with a temperature raising means for raising the temperature of the pulp slurry .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described based on its preferred embodiments with reference to the drawings.

FIG. 1 schematically shows an embodiment of a papermaking apparatus used in the method for producing a pulp molded article of the present invention. In the figure, reference numeral 1 indicates a papermaking apparatus.

As shown in FIG. 1, the papermaking apparatus 1 of this embodiment has a cavity 13 inside which a pair of split dies 11 and 12 are arranged opposite to each other and horizontally moved to assemble to open upward. A pulp slurry mainly composed of a main body (not shown) of a so-called reciprocating type, which forms the molding die 10, and further supplies pulp slurry to the papermaking surface of the papermaking die 10 (inner surface of the papermaking net). Supply means 20, a suction means 30 for sucking the pulp slurry supplied into the cavity 13 by the supply means 20, and a temperature raising means 40 for the supplied pulp slurry.
And a dehydrating means 50 for dehydrating the wet compact in the dehydrating step.

A suction path 14 is provided inside the split molds 11 and 12 constituting the papermaking mold 10.
Is provided with a drain conduit 15 for discharging the pulp slurry discharged to the outside of the cavity 13. The inner surfaces of the split dies 11 and 12 constituting the papermaking mold 10 are covered with a papermaking net (not shown) for depositing pulp. As the papermaking net, a net made of natural fibers, synthetic fibers or metal fibers can be used singly or in combination, and it is also possible to use a net formed by combining the above material fibers and knitting the net. Synthetic fibers are preferably used from the viewpoint of easy formation and durability. Examples of the natural fiber include plant fiber and animal fiber. Examples of the synthetic fibers include synthetic resin fibers made of thermoplastic resin, thermosetting resin, and semi-synthetic resin. Examples of the metal fiber include stainless fiber and copper fiber. The papermaking net is preferably modified on the fiber surface in order to improve the slipperiness and durability of the net. In addition, the paper making net has an average opening area ratio of 10 to 7 in order to prevent adhesion to the inner surface of the split mold and maintain good suction efficiency.
It is preferably 0%, more preferably 25 to 55%. Further, the papermaking net has an average maximum aperture width of 0.1 to 0.1 in order to reliably perform papermaking while suppressing passage of the solid component in the pulp slurry through the net and clogging of the net.
It is preferably 1.5 mm, 0.3 to 1.0 mm
Is more preferable.

The pulp slurry supply means 20 is a storage tank 2 for storing a pulp slurry having a set supply concentration at a predetermined temperature.
1, a supply conduit 22 for guiding pulp slurry from the storage tank 21 toward the opening of the cavity 13, and a supply conduit 2
2, a pressure pump 23, a flow meter 24 for measuring the flow rate of pulp slurry, and a three-way valve 25. The storage tank 21, the pressure pump 23, the flow meter 24, and the three-way valve 25 are arranged in series. The storage tank 21 is an agitator 26
Is equipped with. A return pipe 27 that returns the pulp slurry to the storage tank 21 is connected to the three-way valve 25. The three-way valve 25 can be operated based on the output of the flow meter 24 to switch the flow path of the pulp slurry to the papermaking mold 10 direction or the storage tank 21 direction.

The suction means 30 comprises a suction pump 31, a suction pipe line 32 leading to the suction pump 31 and the suction lines 14 of the split molds 11 and 12, and an opening / closing valve 33 arranged in the suction pipe line 32. There is.

The temperature raising means 40 is a hot water storage tank 41 for storing hot water (fluid for temperature increase) having a predetermined temperature, and a hot water supply for connecting the hot water storage tank 41 and the supply pipeline 22 via a three-way valve 42. A pipe line 43, a pressure pump 44, and a flow meter 45 are provided. The three-way valve 42 enables the supply of only the pulp slurry from the reservoir 21, the supply of only the hot water from the hot water reservoir 41, or the simultaneous supply of both of them.

The dehydrating means 50 includes a supply device 51 for supplying a dehydration fluid into the cavity 13, an air supply line 52 connecting the supply device 51 and the supply line 22, and an air supply line 52 interposed therebetween. Open / close valve 53 and elastic core 5 described later
4 (see FIG. 2).

Next, a method for manufacturing a pulp mold molded body of the present invention will be described based on its preferred embodiment with reference to FIGS.

The paper making process using the paper making apparatus 1 will be described. First, the pressure feed pump 23 is started to suck up the pulp slurry from the storage tank 21, and the pulp slurry is passed through the flow meter 24 and the three-way valves 25 and 42, and then, as shown in FIG. As shown in (a), the slurry is pressurized and injected into the cavity 13 of the papermaking mold 10.

In the present invention, the pressure of pressure injection at the end of injecting pulp slurry into the cavity is 0.01
˜1.0 MPa, preferably 0.1˜0.5
More preferably, the pressure is set to MPa. In addition, the temperature of the pulp slurry supplied into the cavity is 5 to 35 ° C. from the viewpoint of preventing the occurrence of wall thickness unevenness and reducing the effect of addition of additives.
Is preferable and 15-30 degreeC is more preferable.

The pulp fibers used in the above pulp slurry may be the usual pulp fibers used in this type of pulp mold molding. In addition to pulp fiber and water, the pulp slurry contains titanium oxide, zinc oxide,
Additive components such as inorganic pigment components such as carbon black, yellow lead, red iron oxide, ultramarine blue and chromium oxide, and organic pigment components such as phthalocyanine, azo pigments and condensed polycyclic pigments can be added. It is preferable that 0.01 to 10% by weight, particularly 0.2 to 2% by weight, of these additive components be added to the pulp slurry. Further, in addition to such additive components, inorganic substances such as talc and kaolinite, inorganic fibers such as glass fiber and carbon fiber, thermoplastic synthetic resin powder or fiber such as polyolefin, non-wood or plant fiber, polysaccharides It may contain components such as. The blending amount of these components is
It is preferably 1 to 90% by weight, particularly 5 to 70% by weight, based on the total amount of pulp fibers and the components.

Moisture in the pulp slurry pressure-injected into the cavity 13 is sucked into the suction passage 14 and the drain passage 15.
The pulp slurry is discharged to the outside of the papermaking mold 10 through the above, but since the supply amount of the pulp slurry is larger than the discharge amount of the water in the pulp slurry, the inside of the cavity 13 is gradually filled with the pulp slurry. Then, at the time when the injection of a sufficient amount of pulp slurry for depositing pulp is completed, the opening / closing valve 33 of the suction pipe line 32 is opened and the suction pump 31 is operated to cause the suction passage 14 and the suction pipe passage of the papermaking mold 10. The inside of the cavity 13 is depressurized through 32. As a result, the moisture contained in the pulp slurry is discharged, and the pulp contained in the pulp slurry is deposited on the inner surface of the papermaking net to form a wet compact 16 made of a pulp layer.

When the injection of the predetermined amount of pulp slurry is completed, the three-way valve 25 is switched based on the output of the flow meter 24, and the pulp slurry is returned through the return pipe 27 to the storage tank 21.
Return to. On the other hand, the hot water is sucked up from the hot water storage tank 41 by the pressure pump 44, and the flow meter 45, the three-way valve 4
Hot water is injected under pressure into the cavity of the papermaking mold 10 via 2.

In the present invention, the pressure of pressurized injection at the end of injection of hot water into the cavity is 0.01 to 1.0M.
Pa is preferable, and 0.1 to 0.5 MPa is more preferable. Moreover, the temperature of the hot water supplied into the cavity is preferably 35 to 95 ° C., and more preferably 45 to 80 ° C., from the viewpoint of effectively raising the slurry temperature in the cavity to a desired temperature.

As described above, since the pulp slurry and the hot water are both injected under pressure and the inside of the cavity 13 is pressurized to a predetermined pressure, the pressure of the slurry on the inner surface of the cavity 13 is substantially the same at any position. The pulp is evenly deposited on the paper making surface.

The supply ratio of the pulp slurry and the hot water is such that the temperature of the pulp slurry and the hot water, the desired slurry temperature in the cavity, the size and shape of the compact (cavity volume),
It can be appropriately set depending on the additive components in the pulp slurry.

In the present invention, the temperature of the pulp slurry in the cavity is raised during the pulp accumulation. However, from the viewpoint of preventing the occurrence of wall thickness unevenness and the reduction of the additive effect of the additive, the pulp is accumulated at the start of the pulp accumulation. The temperature of the pulp slurry in the cavity is preferably 5 to 35 ° C.,
More preferably, it is -30 ° C. Also, the dehydration efficiency,
From the viewpoint of preventing the occurrence of wall thickness unevenness and reducing the effect of adding additives, the pulp slurry temperature in the cavity at the end of pulp accumulation is preferably 35 to 95 ° C, and preferably 45 to 80 ° C. Is more preferable. And
After the completion of the hot water injection, the on-off valve 53 shown in FIG. As a fluid for dehydration, compressed air at room temperature is used from the viewpoint of handling and the like.

After dehydration, as shown in FIG. 2 (b), while the inside of the cavity 13 is sucked and depressurized through the suction passage 14, the elastic core 5 is elastic and expandable and hollow.
4 is inserted into the cavity 13. The core 54 is inflated like a balloon in the cavity 13 so that the above-mentioned wet compact 16 formed of a pulp layer is formed in the cavity 13.
It is used to give the inner surface shape of the cavity 13 by pressing the inner surface of the cavity 13. Therefore, the core 54 is formed of urethane, fluorine-based rubber, silicone-based rubber, elastomer or the like having excellent tensile strength, impact resilience and elasticity.

Next, as shown in FIG. 2C, the core 54
A pressurized fluid is supplied into the core 54 to expand the core 54, and the expanded core 54 presses the pulp laminate against the inner surface of the cavity 13. Then, the molded body is pressed against the inner surface of the cavity 13 by the expanded core 54, the inner surface shape of the cavity 13 is transferred to the outer surface of the molded body, and the dehydration further progresses. In this way, since the molded body 16 is pressed against the inner surface of the cavity 13 from the inside of the cavity 13, even if the shape of the inner surface of the cavity 13 is complicated, the shape of the inner surface of the cavity 13 can be accurately adjusted to the molded body. Will be transcribed. Moreover, unlike the conventional pulp mold manufacturing method, there is no need to use a laminating step, so that the resulting molded body does not have joints and uneven thickness due to laminating. As a result, the strength of the obtained molded product is increased and the appearance impression is improved. As the pressurized fluid used to expand the core 54, for example, compressed air (heating air), oil (heating oil), and various other liquids are used. The pressure for supplying the pressurized fluid is 0.01 to 5 MPa, and particularly 0.1 to 5.
It is preferably 3 MPa.

When the shape of the inner surface of the cavity 13 has been sufficiently transferred to the molded body 16 and the molded body can be dehydrated to a predetermined water content, as shown in FIG. Pull out. Then, the core 54 automatically shrinks and returns to the original size. Next, the contracted core 54 is taken out from the cavity 13, and the papermaking mold 10 is further opened to take out the undried molded body having a predetermined water content.

The wet compact thus taken out is then subjected to a heating / drying process. In the heating / drying process, the same operations as in the papermaking process shown in FIG. 2 are performed except that the papermaking / dehydration is not performed. That is, first, a dry mold in which a cavity having a shape corresponding to the outer shape of a molded body to be molded is formed by abutting a pair of split molds is heated to a predetermined temperature, and the dry mold is molded in the dry mold. Load the body.

Next, a core similar to the core 54 used in the papermaking process is inserted into the molded body, a pressurized fluid is supplied into the core to expand the core, and the core is expanded. The core presses the molded body against the inner surface of the cavity. The material of the core and the supply pressure of the pressurized fluid can be the same as those used in the above paper making step. Under this condition, the molded body is heated and dried. When the molded body is sufficiently dried, the pressurized fluid in the core is removed, and the core is contracted and taken out. Further, the drying mold is opened and the dried molded body is taken out.

As described above, according to the pulp mold manufacturing method of the present embodiment, the temperature of the pulp slurry supplied into the cavity is raised during the pulp accumulation.
Energy costs can be kept lower than in the past. Further, since the temperature of the pulp slurry is raised during the accumulation of the pulp, the fluidity of the pulp slurry is not high at the initial stage of the accumulation, so that it is possible to suppress the unevenness of the wall thickness of the molded body and the effect of the addition of the additive in the pulp slurry. It is possible to manufacture a pulp mold molded body without damaging the above.
Further, since the temperature of the pulp slurry (including the accumulated pulp) in the cavity rises and the viscosity of water decreases, the dehydration can be efficiently performed, so that the manufacturing time can be shortened.

In addition, the pulp mold molded body produced in this manner had no unevenness in wall thickness and a sufficient additive effect was obtained. Especially when a coloring pigment was used, the outer surface was evenly colored. It is highly decorative. Further, it is a cylindrical bottle (hollow container) whose opening has a diameter smaller than the diameter of the body, and is particularly suitably used for accommodating contents such as powder and granules. In this molded body, there is no joint in any of the opening, the body and the bottom, and the opening, the body and the bottom are integrally formed. Therefore, the strength of the molded body is increased and the appearance impression is improved.

The invention is not limited to the embodiments described above. For example, in the above-described embodiment, the pulp slurry and the hot water are supplied through the supply pipe 22, but the pulp slurry and the hot water may be supplied into the cavity by independent systems.

Further, in the present invention, the supply of hot water for raising the temperature of the slurry in the cavity can be started simultaneously with the start of the supply of the pulp slurry into the cavity, or during the supply of the pulp slurry into the cavity. You can also start at.

After the pulp is deposited and before the fluid for dehydration is supplied, warm water may be supplied into the cavity to raise the temperature of the wet compact itself. This allows
It is also possible to enhance the dehydration efficiency in the subsequent dehydration step. The temperature of the hot water to be supplied can be appropriately set, but in view of the temperature of the molded body, the dehydration efficiency or the handling, it is preferably 40 to 90 ° C., and 50 to 80 ° C.
More preferably, the temperature is set to ° C. Also, hot water can be supplied by pressure injection, and the injection pressure can be the same as the injection pressure of the hot water used for raising the temperature of the pulp slurry.

In the present invention, there is no limitation on the means for raising the temperature of the pulp slurry during pulp accumulation. For example, instead of the hot water, it is possible to use a hot pulp slurry adjusted to the same or different blend composition as the pulp slurry previously injected in the same temperature range as the hot water. When the hot pulp slurries adjusted to have different blending compositions are poured, a molded product having a multilayer structure can be formed. In this case, one storage tank is provided separately from the storage tank 21.
It is preferable to form a wet molded body with the pulp slurry supplied from the above, and then supply the pulp slurry supplied from the other storage tank into the cavity. Also,
It is also possible to supply steam, superheated steam, or heated compressed air into the cavity to raise the temperature of the pulp slurry in the cavity. Further, it is also possible to dispose a heater (heating means) inside the cavity and raise the temperature of the pulp slurry supplied into the cavity by the heater. Here, from the viewpoint of heating efficiency, it is preferable to use a heating fluid rather than using a heater, and as the heating fluid, it is preferable to use hot water or steam from the viewpoint of heat capacity. .

In the above-described embodiment, in the dehydration step, compressed air at room temperature is supplied to the cavity for dehydration, and then dehydration is performed again using the core. Alternatively, it is possible to perform only dehydration using a core. Further, instead of the compressed air at room temperature, heated compressed air, steam, or superheated steam may be supplied for dehydration.

After the pulp accumulation is completed, the on-off valve 53 shown in FIG. 1 is opened to supply the dehydration fluid from the dehydration fluid supply device 51 into the cavity 13 through the air supply line 52 to dehydrate the same. You can also do Compressed air at room temperature is preferably used as the fluid for dehydration from the viewpoints of manufacturing cost, handleability, and the like.

When compressed air at room temperature is used as the fluid for dehydration, the pressure in the cavity (pressure in the mold) is 196.
kPa [gage] or more, preferably 294 kPa [gage]
Blowing is performed as described above. By performing such blowing, water is instantaneously dehydrated (removed) from the wet molded body by a physical mechanism that does not mainly involve heat drying by heat exchange, and the dehydration time can be shortened.
The in-mold pressure means the difference between the inlet pressure and the outlet pressure of compressed air at room temperature into the cavity.

The in-mold pressure is preferably as high as the above-mentioned value or more. However, since the degree of water removal gradually becomes saturated as the in-mold pressure rises, the upper limit of the economically commensurate pressure is set. , 1471k when using compressed air at room temperature
It is about Pa.

Instantaneous dehydration of the molded body by blowing compressed air at room temperature is completed when the in-mold pressure reaches a substantially constant value. Here, the in-mold pressure is determined by the original pressure, the blowing flow rate, and the air permeability of the molded body. Therefore, when the air permeability of the molded body is low and the blowing flow rate is large, the pressure inside the mold rises instantly and the dehydration is completed instantly. On the other hand, when the air permeability of the pulp is high and the blowing flow rate is low, the rise of the in-mold pressure tends to be slow, and the dehydration completion time tends to be long. Generally, dehydration is 0.1-10 seconds,
Especially, it is completed within an extremely short time of about 1 to 5 seconds. By this dehydration, for example, a molded product having a water content of 75 to 80% by weight before dehydration is dehydrated to about 40 to 60% by weight.
There is no particular limitation on the pressure (original pressure) as long as the in-mold pressure is equal to or higher than the above value.

Further, the molded product manufactured according to the present invention is provided with a reinforcing member made of plastic or the like at a portion to which a load is applied during its use, for example, an opening or a bottom, so that the durability of the molded product is improved. Good. Moreover, you may form a part of these parts from plastic etc.

The present invention can also be applied to the manufacture of a substantially rectangular parallelepiped carton type container in which the cross-sectional shape of the opening and the cross-sectional shape of the body are substantially the same. Further, the present invention can be applied not only to the hollow container used to store the contents but also to the production of molded articles such as objects such as ornaments.

Further, as in the above embodiment, the present invention provides a manufacturing method in which a split mold provided with a suction path is assembled to form a papermaking mold, and pulp slurry is injected into the cavity of the papermaking mold from above and supplied. Although suitable, the present invention can also be applied to a manufacturing method in which the papermaking mold is immersed in a pool filled with pulp slurry and the pulp slurry is supplied into the cavity of the papermaking mold. Further, a split papermaking mold provided with a suction path is arranged with its papermaking surface facing upward, and at least an outer frame surrounding the papermaking surface is liquid-tightly arranged in the papermaking mold, After forming a pool for filling the pulp slurry with the outer frame, a method for filling a predetermined amount of the pulp slurry in the pool and sucking the pulp slurry through the suction path to form a molded article on the papermaking surface Can also be applied.

[0044]

EXAMPLES Molded articles were produced as in Example 1 and Comparative Examples 1 and 2 below, and the water content in the production process was measured and examined, and the unevenness in wall thickness and the unevenness in color were evaluated as described below. The respective results are shown in Table 1.

Example 1 A bottle-shaped pulp mold molding was paper-made and dehydrated using the paper-making mold (cavity volume 1 liter) shown in FIG. At the time of papermaking, a pulp slurry of 23 ° C. having the following composition was injected into the cavity under pressure (0.3 MPa), suction of the pulp slurry through the suction passage was started, and pulp was deposited on the papermaking net. Then, after injecting 4 liters of pulp slurry, 5
Hot water (2 liters) at 0 ° C is injected under pressure (0.3 MPa)
Then, the temperature of the pulp slurry in the cavity was raised during the accumulation of pulp on the papermaking net. Further, at the time of dehydration, compressed air at room temperature is blown into the cavity of the papermaking mold so that the pressure in the cavity becomes 0.3 MPa,
It was dehydrated for 15 seconds. Next, insert a hollow core made of an elastic material into the molded body, and apply air to the core with a pressure of 0.5 MPa.
Then, the molded body was pressed against the inner surface of the cavity and dehydrated for 10 seconds.

Next, the papermaking mold was opened and the undried molded body was taken out and loaded into a heating mold heated to 200.degree. The heating mold has a cavity having the same shape as the papermaking mold. A hollow core made of an elastic body was inserted into the molded body loaded in the heating mold, and air was pressed into the core at a pressure of 1 MPa to press the molded body against the inner surface of the cavity for heating and drying. When the molded body was sufficiently dried, the heating mold was opened and the bottle-shaped molded body was taken out. The obtained molded body had an absolute dry weight of 45 g, a height of 240 mm and a body diameter of 80 mm. <Pulp slurry composition> Liquid component: water; 99 wt% Solid component: pulp; 1 wt% Additive component (to pulp weight): Sizing agent: 2 wt%, pigment: 0.3 wt%, sulfuric acid band: 2 wt%

[Comparative Example 1] A comparative example 1 was prepared in the same manner as in Example 1 except that the pulp slurry heated to a high temperature (50 ° C) in advance was supplied into the cavity.

[Comparative Example 2] A pulp slurry was prepared in the same manner as in Example 1 except that the pulp slurry at 20 ° C was supplied into the cavity and the water was changed to warm water to supply water at 20 ° C.

[Measurement Method of Water Content] The weight Ag of the pulp molded body after dehydration and the weight Bg of the pulp molded body after absolutely drying are measured, and the water content is calculated as (AB) × 100 / A. did.

[Evaluation of Thickness Unevenness] After papermaking and dehydration, the state of uneven thickness of the pulp molded body was visually confirmed.
Further, after drying, the wall thickness of the pulp mold molded body was measured with a micrometer.

[Evaluation of Color Unevenness] The appearance of the pulp mold molded body after drying was visually confirmed.

[0052]

[Table 1]

As is clear from the results shown in Table 1, the molded articles of Example 1 (invention products) required a shorter time for dehydration than the molded articles of Comparative Examples 1 and 2 and had a thicker wall. It was confirmed that unevenness and color unevenness hardly occurred.

[0054]

EFFECTS OF THE INVENTION According to the method for producing a pulp mold formed body according to the present invention, the energy cost is low, the thickness unevenness of the formed body is suppressed, and the effect of the additive is not impaired. It is possible.

Further, according to the papermaking apparatus used in the method for producing a pulp mold molded body of the present invention, the above-described method for producing a pulp mold molded body of the present invention can be suitably implemented.

[Brief description of drawings]

FIG. 1 is a schematic view showing a papermaking apparatus used in a method for producing a pulp mold molded body of the present invention.

2 (a) to 2 (d) are schematic process diagrams of one embodiment of a method for producing a pulp mold molded body of the present invention.

[Explanation of symbols]

1 Pulp mold molding machine 2 Pulp slurry supply means 3 suction means 4 Heating means for pulp slurry 10 paper making type 14: suction path

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 2000-25734 (JP, A) JP 10-29661 (JP, A) JP 8-209599 (JP, A) JP 9-119100 (JP, A) JP-A-9-316800 (JP, A) JP-A-2001-146699 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D21J 1/00-7/00 D21H 11/00-27/42 B65D 1/00-1/48

Claims (3)

(57) [Claims] 1. A pulp slurry is supplied to a papermaking surface of a papermaking type having a suction passage, and the pulp slurry is sucked through the suction passage to deposit pulp on the papermaking surface to form a wet compact. In the method for producing a pulp mold molded body, which comprises a papermaking step and a dehydration step of dehydrating the wet molded body formed in the papermaking step, the paper-making mold
The pulp slurry in the cavity during the deposition of the pulp from the pulp slurry in the tee onto the papermaking surface.
Adding a fluid for Atsushi Nobori Luke or heating arranged in the cavity
A method for producing a pulp molded body, comprising heating the pulp slurry with a heater to raise the temperature of the pulp slurry. 2. The pulp slurry is supplied at the same time when the pulp slurry is supplied.
Method for producing a pulp molded article according to claim 1, wherein the properly applying the fluid temperature increase after the start of supply. 3. A pulp mold molded body according to claim 1.
A papermaking machine for use in a manufacturing method, equipped with a suction path.
And the pulp slurry on the papermaking surface of the papermaking mold.
Supply means of pulp slurry to be supplied and supply by the supply means
A suction means for sucking the pulp slurry thus prepared,
The heating fluid is added to the pulp slurry
The pulp slurry is heated by a heater to heat the pulp slurry.
A paper making apparatus provided with a temperature raising means for raising the temperature .