JP2742212B2 - Heating press equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plywood made of a lignocellulose material, a laminated veneer lumbar (LVL),
The present invention relates to a heating press apparatus suitable for subjecting a workpiece such as a particle board, a flake board, a fiber board, a hard board, and a sheet to hot pressing while injecting steam or gas. More particularly, the present invention relates to a heating press apparatus provided with a spacer having a plurality of injection holes for injecting steam or gas pressurized and heated between hot plates. In the present specification, "workpiece" refers to a laminate or the like before pressing,
“Product” refers to a laminated material or the like after pressing.

[0002]

2. Description of the Related Art Conventionally, products such as plywood, particle board, and fiber board made of lignocellulose material are:
Multiple veneers, wood chips (chips) and fibers (fibers)
After the adhesive is applied to the surface of the heating press, the workpiece is stacked, and the workpiece is placed between a pair of heated press plates of a heating press device and hot-pressed to form a plate. In this case, a predetermined heat and pressure time is required to heat and cure the adhesive, and particularly when a thick product is to be manufactured, it is necessary to perform a long time heat and pressure molding in consideration of the time required for heat to be transmitted to the inside of the workpiece. Was. The time of the hot pressing is directly related to the production time, and the long pressing is an obstacle to mass production, and also increases the unit price of the product.

[0003] In order to solve this problem and to shorten the hot pressing time, a steam injection press method has conventionally been adopted. In this press method, as shown in FIG. 11, a number of fine injection holes 2a are formed on each press surface of an upper hot plate 1 and a lower heat plate 2 of a press device, and steam or gas pressurized and heated from the injection holes 2a is discharged from the injection holes 2a. It is a method of injecting. In this method, the steam pipes 3 arranged on the hot plates 1 and 2 are connected to a large number of fine injection holes 2a on each press surface, and these steam pipes 3 are provided with an on-off valve 3a composed of an electromagnetic valve. The heated or pressurized steam or gas conveyed from the steam pipe 3 is injected from a number of fine injection holes 2a on each press surface, and the workpiece 4 is heated by the steam or the like. As a result, the entire work piece instantaneously reaches the curing temperature of the adhesive, greatly reducing the time, and improving the productivity.

[0004] Specific examples of this steam injection press device include a "method of pressing a particle board by a press" (Japanese Patent Publication No. 57-1416), which is provided with a room defining device for defining a room surrounding a region between a pair of press plates. "Steam injection press device" (JP-A-2-192906) provided with a nozzle heating device for heating a steam injection nozzle to a temperature exceeding the condensation temperature of steam, and "Length" provided with a cold platen adjacent to a plate for injecting steam. Gas injection press device for hot-pressing an intermediate product in the form of a plate-shaped body ”(JP-A-4-113809).

[0005] In the "method of pressing a particle board by a press" (Japanese Patent Publication No. 57-1416), heat is rapidly transferred by injecting steam from an injection hole provided in a press plate into a chamber defining device. Allows the adhesive to cure rapidly.
Further, a "steam injection press device" (Japanese Unexamined Patent Publication No.
In 6), productivity is improved by avoiding generation of water droplets at the steam injection nozzle by the nozzle heating device. Further, in a "gas injection press apparatus for hot-pressing an intermediate product of a long plate-like body" (Japanese Patent Application Laid-Open No. 4-113809), when a work piece is continuously hot-press hardened, the work piece is hardened before hot-pressure hardening. Is prevented from becoming semi-cured by the cooling plate.

[0006]

However, each of the apparatuses described in the above publications has injection holes for injecting steam or the like provided on upper and lower press surfaces, and separates steam pipes and the like connected to these injection holes. Therefore, it is not possible to use a hot plate for press of an existing hot press. For this reason, the manufacturing cost of the hot plate for press is increased, and the press apparatus is inevitably expensive. Also, when newly forming a workpiece that is significantly different from the entire injection area of steam etc. formed by a large number of injection holes, the number and position of the injection holes were changed according to the area of the workpiece. Another press hotplate had to be provided.

[0007] Further, since the injection hole for steam injection is provided on the press surface, if a material such as paper or fiber board having poor water resistance is superimposed on the surface of the work, moisture of the work is caused by moisture. There has been a problem that the surface is weakened to cause wrinkles and undulations, and the surface is not smooth. Further, in the case where the workpiece has a flat, poorly air-permeable single plate or the like superimposed on the surface for reinforcement or decoration as described above, the plate-like material blocks the injection hole to prevent steam or the like. Injection is prevented, and there is also a problem that unnecessary steam drains are dropped from the injection holes onto the plate-like object to stain the surface of the workpiece.

An object of the present invention is to provide an inexpensive heating press apparatus that can efficiently press workpieces of different sizes by utilizing a hot plate for press of an existing hot press. Another object of the present invention is that even when a material having poor water resistance or a plate-like material having poor air permeability is overlaid on the surface of a workpiece, it is possible to inject steam or gas into the workpiece, The object of the present invention is to provide a heating press apparatus which keeps the surface smooth and does not stain the surface with stains or the like. Still another object of the present invention is to provide a heating press device for increasing the mechanical strength of a product.

[0009]

A configuration of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The heating press device 10 of the present invention includes an upper hot plate 11
And the lower hot plate 12, and the processing thickness of the workpiece 13 attached to one of the pressing surfaces or both pressing surfaces of the upper hot plate 11 and the lower hot plate 12, and pressed by the two hot plates 11, 12. And a spacer 14 that determines The characteristic configuration is that the spacer 1 facing the workpiece 13 in the pressurized state.
4 is provided with a plurality of injection holes 14b for injecting steam or gas pressurized and heated on the inner surface 14a.

[0010]

A hot press apparatus 10 of the present invention can be provided by forming a screw hole in a hot plate 11 or 12 of an existing hot press and attaching a spacer 14 with a screw. When the workpiece 13 is placed in the spacer 14, the workpiece 13 is pressurized by the pair of hot plates 11 and 12, and at the same time, steam that is pressurized and heated is injected from a number of injection holes 14 b provided in the spacer 14. The injected steam penetrates into the workpiece 13 to transmit heat energy, and instantaneously brings the entire workpiece 13 to a predetermined temperature. If the spacer 14 is an enclosure that surrounds the workpiece 13, the workpiece 13 can be placed on the upper hot plate 11 and the lower hot plate 1.
2 is sealed by the spacer 14 together with the steam, and the injected steam efficiently penetrates into the workpiece. As shown in FIGS. 9 and 10, even when a material having poor water resistance or a plate-like material 32 having poor air permeability is overlapped on both surfaces of the workpiece 13, steam can be permeated inside the workpiece. In addition, the surface of the workpiece 13 after pressing is kept smooth, and the surface is free from stains and the like.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the heating press device 10 has an upper hot plate 11 on the upper side and a lower hot plate 12 on the lower side. In this example, the lower hot plate 12 is fixed, the upper hot plate 11 moves up and down, and presses the workpiece 13 disposed therebetween. The lower heating plate 12 includes a spacer 14
Is attached. The spacers 14 are for determining the thickness of the workpiece 13 after the hot pressing, and in this example, a square frame surrounding the workpiece 13 corresponding to the outer shape of the rectangular workpiece 13. It is formed into an enclosure. A screw hole (not shown) is provided at a predetermined position of the lower hot plate 12,
A square frame-shaped spacer 14 is attached with six screws 15. The spacer 14 is configured to seal the workpiece 13 together with the upper hot plate 11 and the lower hot plate 12 in a pressurized state.

A plurality of injection holes 14b for injecting steam or gas pressurized and heated are provided in a row on the inner surface 14a of the spacer 14 facing the workpiece 13 in a pressurized state. Thereby, the steam or the like injected from the injection hole 14b can be efficiently permeated into the workpiece 13. Preferably, the thickness of the spacer 14 is at least 15 mm. This is because when a workpiece having a thickness of less than 15 mm is obtained by hot-pressing with a spacer 14 having a thickness of less than 15 mm, the upper and lower hot plates can be hot-pressed in a relatively short time. This is because when the thickness of 14 is 15 mm or more, the effect of shortening the heat and pressure time is increased.

As shown in detail in FIG.
“b” is provided on the four inner surfaces 14 a of the square frame-shaped spacer 14 at equal intervals in parallel with the press surface of the lower hot plate 12. A large number of injection holes 14b are provided with spacers 14 as shown by broken lines.
It is connected inside and is connected to a steam pipe 16 provided on the outer surface of the spacer 14. The steam pipe 16 is provided with an on-off valve 17 composed of an electromagnetic valve. As shown in FIG. 3, steam pipes 11a and 12a for heating these hot plates 11 and 12 are provided in a meandering manner, respectively, although not shown.
Although not shown, the steam pipes 11a and 12a are provided with an inlet valve and an outlet valve, each of which is an electromagnetic valve. The steam heated in the steam pipes 11a and 12a is introduced or cut off by the electromagnetic valves, so that the hot plates 11 and 12 are heated. The heating temperature can be adjusted.

The workpiece 13 to be processed by the heating press device 10 of the present embodiment includes a plywood made of a lignocellulose material, a laminated veneer lumbar, a particle board, a flake board, a fiber board, a fiber board, a hard board and a sheet. And a laminate obtained by laminating one or more selected from the group consisting of: And as a sheet-like material made of lignocellulose material, for example, bagasse,
Examples include a sheet-like molded article made of a plurality of straight stems of an annual plant such as cotton, bamboo, sunflower, sunflower, corn, sorghum, or sugar cane. This sheet-shaped material is not limited to a single kind of annual plant, and may be a combination of two or more kinds of annual plants.

As shown in FIG. 5, the workpiece 13 before pressing according to the present embodiment has a skin 2 mainly composed of lignocellulose.
0a and a plant stem 2 having a porous core 20b in the core
0 as shown in FIG.
After being compressed by 1, 2 to generate cracks 23 in the skin, the plant stem 20 is immersed in a hardening liquid such as a phenolic resin solution, impregnated with a predetermined amount of the hardening liquid, and furthermore, as shown in FIG. The compressed plant stem 20 is made into a sheet 30 by knitting it with a thread 24 into a sheet, and a plurality of sheets 30 are overlapped while applying an adhesive thereto.
When a laminate is made of sheet-like materials, the plant stem 20 configured as shown in FIG. 1 intersects each sheet-like material when imparting uniform bending strength in all directions and preventing warpage of the laminate. As described above, the workpiece 13 is obtained by laminating a plurality of the sheet-like objects 30. When the bending strength in a specific direction is extremely increased, the plant stem 20 having the structure shown in FIG.
Are processed in the same direction, thereby forming a work 13 in which a plurality of sheet-like materials 30 are stacked. As shown in FIG. 8, a workpiece 13 in which a plant stem constituting a part of the sheet 30 is crossed with a plant stem constituting another sheet 30 may be used.

The workpiece can be composed only of plant stems, but as shown in FIGS. 9 and 10, a sheet-like substance 30 and a plate-like substance 32 composed of the plant stems are combined to constitute the workpiece 13. You can also. Examples of the plate-like material 32 include wood veneer, such as wood veneer, ground plate, laminated wood, plywood, particle board, hard board, insulation board, fiber board, laminated veneer lumbar, lumber board, cardboard, and the like. Metal plates such as iron plate, galvanized steel plate, painted steel plate, stainless steel plate, aluminum plate, copper plate and lead plate; and inorganic plate-like materials such as calcium silicate plate, wood wool cement plate, asbestos cement plate and gypsum board. A plate material of synthetic resin such as vinyl chloride resin, acrylic resin, styrene resin, ABS resin, AS resin, phenol resin, melamine resin, urea resin, polyethylene and polypropylene is used. In addition to a flat plate having a flat surface, a plate having an uneven surface such as a corrugated plate or a keystone plate, a foamed plate, a mesh plate, or the like may be used as the plate-like material.

As shown in FIG. 4, a spacer 45 may be attached to the press surface of the upper hot plate 43 of the heating press device 40. In this case, the workpiece 42 can be easily placed on the lower hot plate 44. In FIG. 4, 43b, 43d, 4
4d is a steam pipe, 43c is an on-off valve, and 45a is an injection hole.
Reference numeral 41 denotes a metal plate for smoothing the surface of the workpiece 42 after pressing.

Workpiece 1 comprising a plurality of sheet-like objects 30
Workpiece 13 composed of three or more sheet-like materials 30 and plate-like materials 32, or a plurality of sheet-like materials 30 and metal plate 41
The work piece 42 consisting of
The above-mentioned heating press device 10 or 40 integrally performs hot-press molding. Heating press device 10 shown in FIGS.
, The hot plates 11 and 12 are heated by introducing heated steam into steam pipes 11a and 12a provided on each hot plate. Injection hole 14 provided in spacer 14
The temperature of the steam injected from b is preferably in the range of 50 to 250 ° C., and the pressure is preferably in the range of ^{2 to} 30 kg / cm ² . In this case, it is preferable that the temperature of the hot plates 11, 12 is set to be higher than the temperature of the steam injected from the injection holes 14b.

After the hot plates 11, 12 reach a preset temperature, the workpiece 13 is placed inside the space partitioned by the spacers 14. The upper hot plate 11 is lowered and the work 13
Press. Next, the workpiece 13 is heated by injecting steam from the injection holes 14b. Here, the timing of injecting the steam from the injection hole 14b is determined in order to effectively use the steam.
3 is a time when the hot plates 11 and 12 are sealed with the spacers 14 or the hot plates 11 and 12 come into close contact with the workpiece 13 and the pressing force reaches a predetermined value. Is selected from the range of several seconds to several minutes depending on the thickness of the sheet and the presence or absence of the plate-like material. In this pressurized state, the electromagnetic valve, which is the on-off valve 17 provided on the steam pipe 16, is opened, and the steam pressurized and heated is injected from the many injection holes 14 b provided on the spacer 14. The injected steam penetrates into the workpiece 13 and transmits thermal energy in the same manner as in the conventional steam injection press method, and instantaneously brings the workpiece 13 to a predetermined temperature. After maintaining the heating and pressurizing state for a predetermined time, the on-off valve 17 is closed to stop the injection of steam from the injection hole 14b,
The upper heating plate 11 is raised to end a series of heating and pressing steps.

When the pressurized and heated steam or gas is jetted onto the workpiece during hot pressing, if the workpiece is strongly compressed, it has a dense composition and the voids inside the workpiece decrease. ,
The penetration of steam or gas into the workpiece is significantly reduced.
Normal products often have a thickness of 15 mm or less.
In the case of manufacturing a product having a thickness of not less than mm, a method is first employed in which a product such as a thin laminated material is prepared, and a plurality of thin laminated materials are re-laminated. In the case of using the heating press device of the present embodiment, products having a thickness of 15 mm or more can be laminated by a single heat and pressure, and the production efficiency is remarkably improved. However, when making a product such as a laminated material having a thickness of 200 mm or more, the thickness of the laminate (workpiece) before hot pressing becomes too large, and unless the stroke interval of the heating press is widened, the hot press It becomes difficult to implement, and inevitably increases the volume of the heating press and equipment costs. Therefore, the thickness of a product such as a laminated material is desirably 15 to 200 mm.

Next, a specific example using a heating press device in which a spacer is attached to an upper hot plate as shown in FIG. 4 will be described. <Example 1> Chips obtained by crushing veneer veneer chips with a chipper were dried to a moisture content of 4% or less. 100% by weight of a low formaldehyde type urea resin adhesive of 65% concentration, 2 parts by weight of 25% ammonia water, paraffin emulsion (CER-
45) 5 parts by weight and 1 part by weight of ammonium chloride powder were mixed to prepare a size liquid. The dried chip was spray-coated with an adhesive liquid so that the solid content of the adhesive became 10%, and then the chip was packed in a wooden frame, compressed and preformed.

A square frame-shaped aluminum spacer having a thickness of 40 mm was attached to the upper hot plate of the heating press. As shown in FIG. 2, the nozzles were arranged in a row on the inner surface of the spacer. The upper hot plate was a fixed plate, which was maintained at 150 ° C. by a steam pipe provided inside. The lower hot plate moving up and down was similarly configured and kept at 150 ° C. A preformed chip compact slightly smaller than the spacer frame was placed on the lower hot plate, the lower hot plate was raised, and the chip compact was first hot-pressed with the upper hot plate at a pressure of 20 kg / cm ² . . Immediately after the lower hot plate came into contact with the spacer, the pressure at a temperature of 150 ° C was 5 kg / cm ² from the injection hole of the spacer.
Was injected for one minute. After 1 minute, the molding pressure is increased to 10
The pressure was reduced to kg / cm ² and compression continued for another 3 minutes. Thereafter, the workpiece was taken out of the heating press and left at room temperature for about one week to obtain a particle board having a thickness of 40 mm.

Comparative Example 1 The same heating press as in Example 1 except that two square pillar-shaped spacers each having no injection hole and having a thickness of 40 mm were attached to the upper hot plate along the left and right sides of the workpiece. The device was used. Holding the upper and lower hot plates to a temperature of respectively 0.99 ° C., in the first 5 minutes among the pressure of 20 kg / cm ^2, after which 10 kg / cm ² pressure gauge 20 min chip molded body hot press molding. Thereafter, a particle board having a thickness of 40 mm was obtained in the same manner as in Example 1. The particle boards of Example 1 and Comparative Example 1 thus obtained were subjected to the test method of JISA 5908 U type according to the following method.
The bending strength, peel strength and thickness swelling ratio were measured respectively. Table 1 shows the results.

[0024]

[Table 1]

As is clear from Table 1, the bending strength of the particle board of Comparative Example 1 was slightly higher than that of the particle board of Example 1, but the peel strength was lower than that of Example 1, and the thickness swelled. The rate was also large. This is presumed to be because the particle board of Example 1 is uniformly hardened to the inside, whereas the particle board of Comparative Example 1 is slightly harder on both sides of the board than inside the board.

<Example 2> An alkali resol type phenol resin (concentration: 50%) experimentally produced in a laboratory was added to a wood fiber defibrated by a defibrator at a resin solid content of 8% based on 100 parts of the total dry weight of the fiber. After spray coating so as to fill in a wooden frame 30cm on one side,
Preformed. The workpiece was hot-pressed using the same heating press as in Example 1 except that a rectangular frame-shaped spacer having a steam injection hole with a thickness of 30 mm was used. That is, the preformed fiber mat is placed on a lower hot plate maintained at a temperature of 180 ° C.
Between the upper hot plate held at a temperature of 0 ° C.
g / cm ² , and the fiber mat was hot-pressed for 1 minute. After 1 minute, the pressure was reduced to 10 kg / cm ² and the hot-pressing was continued, and the pressure of the pressing device was 10 kg / cm ^2.
After that, steam at a temperature of 180 ° C. and a pressure of 10 kg / cm ² was injected from the injection hole of the spacer for 1 minute. After one minute, the pressure in the space surrounded by the spacer was returned to normal pressure, and compression was continued for another minute. Thereafter, the workpiece was taken out of the heating press device and left at room temperature for about one week to obtain a fiber mat having a thickness of 30 mm.

Comparative Example 2 The same heating press as in Example 1 except that two square pillar-shaped spacers having a thickness of 30 mm without injection holes were attached to the upper hot plate along the left and right sides of the workpiece. The device was used. Each of the upper and lower hot plates is maintained at a temperature of 180 ° C., and the same fiber mat as that of Example 2 is hot-pressed at a pressure of 20 kg / cm ² for the first 3 minutes and then at a pressure of 10 kg / cm ² for a total of 10 minutes. did. Thereafter, a fiber mat having a thickness of 30 mm was obtained in the same manner as in Example 2. The fiber mats of Example 2 and Comparative Example 2 thus obtained were measured for flexural strength, peel strength and thickness swelling rate in accordance with JIS A5906 P type test method. Table 2 shows the results.

[0028]

[Table 2]

The fiber mat of Example 2 showed the same physical property values as those of Example 1 and Comparative Example 2 as compared with the fiber mat of Comparative Example 2.

<Embodiment 3> A skin 20a mainly composed of lignocellulose as shown in FIG.
As shown in FIG. 6, the tall stalk 20 having the structure b was compressed by the compression rollers 21 and 22 without being cut open to generate a crack 23 in the skin. The high spike 20 was immersed in a phenol resin solution to impregnate the phenol resin with 15% by weight. Next, although not shown, a large number of compressed high stems 20 are knitted into a sheet shape by using a thread to form a sheet, and five sheets 30 are glued together with an adhesive so that the stems constituting the sheet 30 are orthogonal to each other. The layers were superposed while being applied at a rate of 250 g / m ² per layer.

After the upper and lower hot plates 11 and 12 of the heating press 40 shown in FIG. 4 were kept at a temperature of 150 ° C., five sheets 30 were compressed by these hot plates 11 and 12. The upper hot plate 11 has a thickness 30 having a steam injection hole 14b.
The spacer 14 in the form of a square frame having a width of 2 mm was attached. When the pressure reaches 8 kg / cm ^2, pressure temperature 0.99 ° C. was injected 5 min steam 5 kg / cm ^2. After the injection, the space surrounded by the spacers 14 was depressurized by a decompression pump.
After hot pressing for a total of 10 minutes, the laminate was taken out and left at room temperature for about one week.

<Comparative Example 3> As shown in FIG. 11, a steam injection hole 2a (the hot plate 1 is not shown) is provided on the press surfaces of the upper hot plate 1 and the lower portion 2, and heating without a spacer is provided. Using the press device, the same sheet-like laminate as in Example 3 was hot-pressed under the same conditions as in Example 3. Since there was no spacer, steam injection from the injection hole was not performed.

When the thus obtained laminate of Example 3 and the laminate of Comparative Example 3 were compared, the laminate of Comparative Example 3 had irregularities on the surface and had a problem in surface smoothness. In contrast, the laminate using the spacer of Example 3 had a smooth surface and had no problem.

In the above embodiment, the spacer is fixed with a screw. However, the present invention is not limited to this, and means such as welding and bonding may be used. Further, in the above embodiment, the spacer is attached to the lower heating plate or the upper heating plate, but may be attached to both the upper heating plate and the lower heating plate. Further, the shape of the spacer is not limited to a rectangular frame, and if the workpiece has a polygonal outer shape, it may be an enclosure corresponding to the shape. Further, in the above embodiment, the workpiece is pressed while the upper hot plate is lowered or the lower hot plate is raised, but both the upper and lower hot plates may be moved and pressed. Further, in the above-described embodiment, the case of heating by steam has been described. However, the present invention is not limited to steam, and a heated and pressurized gas may be used.

[0035]

As described above, as compared with the conventional heating press, the heating press of the present invention has an injection hole in the spacer, so that the inside of the workpiece can be heated from the side of the workpiece. Can infiltrate the pressurized steam or gas,
The time for hot pressing can be significantly reduced, and as a result, productivity can be significantly improved. In addition, when the spacer is attached with screws or the like, only the spacer is replaced depending on the size of the workpiece, so that a versatile and inexpensive heating press can be realized.

In addition, steam can be generated by attaching only the spacer to the hot plate for press of the existing hot press, and the existing hot press can be utilized. Also,
Compared to a hot press that injects steam or gas from a conventional hot plate, even if a material with poor water resistance or a plate with poor air permeability is placed on the upper and lower surfaces of the workpiece, Steam or gas can be injected, the surface of the product is kept smooth, and the surface is not stained. Furthermore, compared to the conventional heating press, the heat pressure time is 1 hour.
In addition to being reduced by 0 to 90%, there is an effect of reducing the thickness unevenness and the thickness swelling ratio, and increasing the mechanical strength.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heating press apparatus according to an embodiment of the present invention for hot-pressing a workpiece consisting of only a plurality of sheet-like objects.

FIG. 2 is a plan view of a lower hot plate of the heating press device.

FIG. 3 is a cross-sectional view of an embodiment of a heating press apparatus for hot-pressing a work in which a plate-like material is laminated on both surfaces of a plurality of sheet-like materials.

FIG. 4 is a cross-sectional view of another embodiment of a heating press apparatus for hot-pressing a workpiece in which metal sheets are laminated on both surfaces of a plurality of sheet-like objects.

FIG. 5 is a perspective view of a plant stem which is a starting material of a workpiece.

FIG. 6 is a perspective view of a compression roller that compresses the plant stem to generate a crack in a skin portion.

FIG. 7 is a side view of an object to be processed in which a plurality of sheet-like objects are stacked with all the arrangement directions of plant stems being the same.

FIG. 8 is a side view of a workpiece in which a plurality of sheet-like materials are stacked with the arrangement direction of plant stems of some sheet-like objects different from the arrangement direction of plant stems of other sheet-like materials.

FIG. 9 is a perspective view showing a situation in which a plurality of sheet-like objects are overlapped with the plant stem arrangement direction intersecting each sheet-like material, and plate-like objects are overlapped on both upper and lower surfaces thereof.

FIG. 10 is a side view of a workpiece in which plate-like objects are stacked on both sides of the stacked sheet-like objects.

FIG. 11 is a view corresponding to FIG. 1 showing a conventional heating press device.

[Explanation of symbols]

 10, 40 Heat press device 11, 43 Upper hot plate 12, 44 Lower hot plate 13, 42 Workpiece 14, 45 Spacer 14a Inner surface of spacer 14b, 45a Injection hole 20 Plant stem 30 Sheet-like material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B27N 3/08 B27D 3/00

Claims (5)

(57) [Claims] An upper heating plate (11, 43) and a lower heating plate (12, 44)
And the upper hot plate (11, 43) and the lower hot plate (12, 44) are attached to one or both press surfaces and are heated by the two hot plates (11, 12, 43, 44). Work to be pressed (13,42)
A heating press device (10, 40) including a spacer (14, 45) for determining a processing thickness of the workpiece (13, 42).
A heating press device characterized in that a plurality of injection holes (14b, 45a) for injecting steam or gas pressurized and heated are provided on the inner surface (14a) of the (4,45). 2. The spacer (14, 45) has a thickness of at least one.
The heating press device according to claim 1, which is 5 mm. The spacer (14, 45) is an enclosure surrounding the workpiece (13, 42) corresponding to the outer shape of the workpiece (13, 42), and the heating press device (10, 40). ),
2. The heating press apparatus according to claim 1, wherein the workpiece (13, 42) is sealed together with the upper hot plate (11, 43) and the lower hot plate (12, 44) in a pressurized state. 4. The workpiece (13, 42) is selected from the group consisting of plywood, laminated veneer lumbar, particle board, flake board, fiber board, hard board and sheet-like material made of lignocellulose material. The heating press device according to claim 1, wherein the heating press device is a laminate in which two or more types are laminated. 5. A sheet-shaped molded product made of a plurality of plant stems (20) of bagasse, cotton, bamboo, sunflower, sunflower, coconut, corn, sorghum or sugar cane, wherein the sheet-shaped material (30) made of a lignocellulose material is used. The heating press device according to claim 3, wherein