JP2017052114A - Method for manufacturing consolidated plate material - Google Patents

Abstract

To enable the consolidation and fixing of a plurality of wood boards 1, 1,.
After consolidating each wooden board material 1 so as to be thinner than a target thickness or higher than a target density, two wooden board materials 1 superposed so that respective surfaces 1a and 1a are in contact with each other. , 1 are laminated through a plurality of metal meshes 6, 6,... Stacked on each other to form a laminated body 3, and the laminated body 3 is pressed in the laminating direction, so that each wooden board 1 has a desired thickness Compress to density. Then, each wooden board | plate material 1 is fixed to the target thickness or density by making high-temperature / high pressure steam act on each wooden board | plate material 1 of this pressurized laminated body 3 in the autoclave with the compression state.
[Selection] Figure 2

Description

  The present invention relates to a method for producing a consolidated plate by compressing a wooden plate, and more particularly to a method for producing a consolidated plate that hardly undergoes dimensional changes even when water or heat acts.

  Conventionally, for the purpose of increasing the surface hardness and strength of wood, a method for producing a consolidated plate material by watering and heating wood, compressing it to a predetermined thickness or density and drying it is known. ing. In this case, the timber tends to return to the original state when water or heat is applied, so that a dimensional change occurs. Therefore, in order to solve this problem, a method has been proposed in which wood is fixed to a predetermined thickness or density by applying high-temperature and high-pressure steam in an autoclave.

  For example, in Patent Document 1, a press die is arranged inside a heating can body, and the wood is compressed by the press die, and high-temperature and high-pressure steam is supplied into the heating can body to compress the compressed wood. I try to fix it.

JP-A-10-58407

  In the thing of patent document 1, although the fixation of the timber is carried out by carrying out a high temperature / high pressure process, the number of timbers which can be processed is one sheet at a time. In order to process a plurality of pieces of wood at a time, a method of arranging the plurality of pieces of wood side by side or stacking them in a layer direction can be considered. In that case, if arranged side by side, a huge autoclave treatment apparatus is required, which is practically impossible. On the other hand, when wood is laminated and compressed, there arises a problem that uneven compression occurs or the passage of steam into the wood is poor, and a plurality of high-temperature and high-pressure treatments cannot be stably performed.

  The present invention has been made in view of such points, and an object of the present invention is to make it possible to efficiently perform the compacting process even on a plurality of wooden boards by improving the wood compacting method. .

  In order to achieve the above object, according to the present invention, two wooden boards are stacked so that the surfaces are in contact with each other, stacked in a plurality through a plurality of steam passage members, and the stacked body is added. While compressing each wooden board | plate material with a pressure, high temperature / high pressure steam was supplied in the compression state, and high temperature / high pressure steam was made to act on each wooden board | plate material from the back surface through the clearance gap between several steam passage members.

  Specifically, the first invention is a method for producing a consolidated board by compressing a wooden board, and two wooden boards stacked so that their surfaces abut each other are stacked on top of each other. By laminating a plurality of plate-like steam passage members having openings, a laminated body, and laminating one or two or more laminated bodies and pressurizing them in the laminating direction, each wooden board material is Each wooden board is made into a target by making high-temperature high-pressure steam act on each wooden board of the laminate pressed in this board compression process and the compressed state in the compressed state to the thickness or density. And an immobilization treatment step of fixing to a thickness or density.

  In the first invention, in the plate material compression step, two wood plate materials are superposed with their respective surfaces in contact with each other, and the two wood plate materials are laminated via a plurality of steam passage members. A laminate is formed. By laminating one or two or more laminates and pressurizing them in the laminating direction, each wooden board is compressed to have a desired thickness or density. In the subsequent immobilization process, the high-temperature and high-pressure steam is applied to each wooden board material in a state where each wooden board material of the laminate is in a compressed state, and each wooden board material is fixed to a desired thickness or density to become a consolidated board material. Become.

  At that time, in the laminated body, the surfaces of the two wooden boards are in contact with each other, and the vapor passage member is in contact with the back surface thereof, so that even if the laminated wooden board is compressed in the board compression process, Only the vapor passage member enters the back surface, and the surface can be kept beautiful.

  When one steam passage member is used, the front and back surfaces of the steam passage member are sunk into the wood board, and the passage of steam is hindered. Therefore, by using a plurality of steam passing members, a special effect that steam passes through the gaps between the contact surfaces of the steam passing members can be obtained.

  Further, in the laminate, a plurality of plate-like steam passage members having a large number of openings are arranged between two wooden boards and the other two wooden boards adjacent to these boards. A gap is formed between the plurality of steam passage members, and when the high-temperature and high-pressure steam is applied to each wooden board material in the fixing process, the high-temperature and high-pressure steam passes through the gap between the plurality of steam passage members. To come. The high-temperature and high-pressure steam that has passed through it is distributed uniformly to the compressed wooden board through the numerous openings of the steam-passing member, enters the wooden board from the back side, or heats the back side to cause moisture in the wooden board. Or become vaporized. This makes it possible to reliably and uniformly fix each wooden board material to a target thickness or density despite the fact that a plurality of wooden board materials are laminated. Thus, since the laminated body which laminated | stacked the several wooden board material is compressed and fixed at once, and it becomes a compacted board | plate material, the production efficiency of a compacted board | plate material can be improved.

  Further, after the fixing treatment step, the steam inside the wood board also escapes through the gaps between the steam passage members, so that puncture hardly occurs without forced cooling, and the production efficiency can be further improved.

  Further, since the steam can be applied to the entire surface of the plurality of wood boards subjected to the treatment, in particular, the compression and fixation of the vicinity of the surface can be realized.

  Moreover, since the laminated body of one layer or a plurality of layers can be treated at high temperature and high pressure steam at a time via the steam passage member, the efficiency is good.

  2nd invention is equipped with the board | plate material compaction process which compacts each wooden board | plate material so that it may become thinner than the target thickness or higher than the target density before the board | plate material compression process in 1st invention, In the plate material compression step, the wood plate material compacted in the plate material consolidation step is compressed so as to have a target thickness or density.

  In the second aspect of the invention, the plate material compaction step is performed prior to the plate material compression step, and the wooden plate materials are individually consolidated so as to be thinner than the target thickness or higher than the target density. In the subsequent plate material compression step, a plurality of consolidated wood plate materials are stacked and compressed via a steam passage member, and in the compression, the wood plate material is compressed to a target thickness or density.

  In the first aspect of the present invention, compression fixation near the surface is possible. However, in order to uniformly compact the inside of the wooden board material, an autoclave device with a built-in press device is required, which increases the equipment and cost. On the other hand, as in the second invention, first, each wooden board is consolidated so as to be thinner than the target thickness or higher than the target density, and then a laminate of the wooden boards is formed to form the wooden Since the plate material is compressed to the desired thickness or the desired density and fixed, the consolidation treatment and the fixation treatment of the wooden plate material are separated, and a large-scale autoclave treatment device and press device Without using a built-in autoclave device, it is possible to obtain a good consolidated plate material by eliminating compression unevenness in the thickness direction of the wooden plate material.

  That is, after compacting each wooden board material to be thinner than the target thickness, forming a laminate of wooden board materials, compressing the wooden board material to the target thickness, and fixing it, the thickness There is little unevenness and post-processing such as grinding is unnecessary, and a compact plate with high dimensional accuracy can be obtained.

  On the other hand, after each wooden board is consolidated to be higher than the target density, a laminate of the wooden boards is formed, and the wooden board is compressed to the target density, and then fixed, A compacted plate material having uniform physical properties with little vertical density unevenness can be obtained.

  In addition, since the volume of the wood board is reduced by the amount consolidated in the board consolidation process, for example, when it is placed in an autoclave and fixed, the amount of carry-in once increases, which increases the production efficiency. Can do.

  According to a third invention, in the first or second invention, in the plate material compression step, one or more laminates are laminated by a fixing jig and pressed in the lamination direction so that each wooden plate material has a desired thickness or density. In the immobilization process, the laminate that has been pressurized by the fixing jig is carried into an autoclave and each wooden board is fixed to a desired thickness or density with high-temperature and high-pressure steam. It is characterized by.

  In the third invention, in the plate material compression step, one or two or more laminates are laminated by a fixing jig, pressed in the lamination direction, and compressed so that each wooden plate material has a target thickness or density, In the subsequent immobilization process, the laminate that has been pressurized by the fixing jig is carried into the autoclave, and the wooden boards are fixed to the desired thickness or density by the action of high-temperature and high-pressure steam. In this way, it is only necessary to carry the immobilization process by loading the laminate that has been pressurized by the fixing jig into the autoclave, and it is only necessary to use the fixing jig and the autoclave, thereby simplifying the configuration of the apparatus. it can.

  4th invention is 1st or 2nd invention. WHEREIN: In a board | plate material compression process, 1 or 2 or more laminated bodies are laminated | stacked with a press apparatus in an autoclave, and each wooden board | plate material is made into the target thickness by pressing in a lamination direction. Alternatively, in the immobilization treatment step, each wooden board is fixed to a desired thickness or density with high-temperature and high-pressure steam in the same autoclave while the laminate is being pressed by the pressing device in the fixing treatment step. It is characterized by that.

  In the fourth invention, in the plate material compression step, the laminated body is pressed by a press device in the autoclave and compressed so that each wooden plate material has a desired thickness or density. In the subsequent fixing treatment step, Each wooden board | plate material is fixed to the target thickness or density by the effect | action of high temperature high pressure steam within the same autoclave in the state in which the laminated body was pressurized by the apparatus. Thus, the plate material can be continuously compressed and fixed in the autoclave, and the production efficiency can be increased.

  According to a fifth invention, in any one of the first to fourth inventions, the steam passage member is a wire mesh.

  In the fifth aspect of the invention, the metal mesh is formed with a number of meshes as openings, and a plurality of metal meshes are stacked and interposed between the back surfaces of the two wooden boards in the laminate, thereby fixing the metal mesh. In the process, high-temperature and high-pressure steam passes through the gaps between the wire meshes and acts on the back surface of each wood plate material through each wire mesh, so that each wood plate material is securely and uniformly fixed to the desired thickness or density. In addition, it is possible to improve the production efficiency by making it easy for the steam inside the wood board after the fixing treatment step to escape through the gaps between the wire meshes.

  At this time, when one wire mesh (steam passage member) is used, the front and back surfaces of the wire mesh are sunk into the wooden board material, and the passage of steam is inhibited. Therefore, by using a plurality of wire meshes, the effect that steam passes through the gaps between the contact surfaces of the wire meshes can be obtained.

  A sixth invention is characterized in that, in any one of the first to fifth inventions, the plurality of steam passage members are three.

  In the sixth aspect of the invention, a total of two gaps are formed between the three steam passage members, so that the high-temperature and high-pressure steam can be more easily passed.

  As described above, according to the present invention, two wooden boards laminated on the surface are laminated via a plurality of plate-like steam passage members having openings, and one or more laminated bodies are obtained. By laminating and compressing each wooden board by pressing in the laminating direction, and by applying high-temperature and high-pressure steam to each wooden board in the laminate in its compressed state, and fixing each wooden board to the desired thickness or density In the immobilization process, high-temperature and high-pressure steam is allowed to pass through the gaps between the plurality of steam passage members and can be evenly distributed to the wood board through the openings. Each wooden board | plate material can be fixed to the target thickness or density reliably and uniformly, and the production efficiency of a compacted board | plate material can be improved.

FIG. 1 is a process diagram of a method for producing a consolidated plate material according to an embodiment of the present invention. FIG. 2 is an exploded front view schematically showing the laminate. FIG. 3 is a front view schematically showing the fixing jig. FIG. 4 is a diagram showing a change in the thickness of the wooden board in each step when the wooden board is made to have a target thickness. FIG. 5 is a diagram showing a change in the density of the wooden board in each step when the wooden board is made to have a target density. FIG. 6 is a diagram showing a dimensional recovery rate when three metal meshes are interposed between the back surfaces of the wood board in the example, together with when one metal mesh is interposed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

  FIG. 1 shows the steps of a method for manufacturing a consolidated plate according to an embodiment of the present invention. This manufacturing method is a method of compressing the wooden plate 1 shown in FIG. 2 into a consolidated plate having a predetermined thickness or a predetermined density. There is a plate material consolidation step P1, a plate material compression step P2, an immobilization treatment step P3, and a cooling step P4. As the wood board 1, for example, wood, laminated wood, wood fiber board or the like can be used.

(Plate material consolidation process P1)
The plate material consolidation step P1 is first performed before the plate material compression step P2, and the wood plate material 1 is consolidated to be thinner than the target thickness or higher than the target density.

  When the wood board 1 is consolidated to be thinner than the target thickness, the compression rate is preferably 20% to 60%, for example, the wood board 1 having a thickness of 3.1 mm is consolidated to a thickness of 1.5 mm. In this case, the compression rate is about 52%. That is, this compression rate is the ratio of the compression amount to the thickness of the plate material before compression, and is represented by (thickness before compression−thickness after compression) / thickness before compression × 100.

  On the other hand, when the wood board 1 is consolidated to be higher than the target density, the pressure is preferably 2 MPa to 9 MPa, for example.

  Although not shown in the drawing, a hot press roll, a room temperature roll, a flat plate press or the like is used as a press apparatus used for compaction. In this case, it is preferable to use a roll-shaped compaction facility, because a linear pressure can be applied to the wooden board material, and uniform compaction can be achieved over the entire surface. In the flat plate press, when the compaction is performed so as to be thinner than the target thickness, the thickness may be adjusted by inserting a distance bar. Further, for example, it is preferable to perform compaction by applying a temperature of 120 ° C. to 220 ° C. The press pressure can be reduced, the press equipment can be simplified, and the wood is not damaged.

(Plate material compression process P2)
In the next plate material compression step P2, the wood plate material 1 consolidated in the plate material consolidation step P1 is compressed to a desired thickness or density.

  Specifically, as shown in FIG. 2, two consolidated wood boards 1, 1 are overlapped so that the surfaces 1a, 1a abut each other to form one set S, and this wood board 1, A plurality of sets (for example, 10 sets) of one set S are stacked to form a stacked body 3. At that time, a plurality of (three in the illustrated example) wire meshes 6, 6,. To do. In addition, a plurality of wire meshes 6, 6,... (Vapor passing members) are laminated on the lower surface of the lowermost set S and the upper surface of the uppermost set S, respectively. Thus, the plurality of metal meshes 6, 6,... Are arranged on the back surface 1b side of the wood board 1 in each set S. The plurality of sets S, S,..., And a plurality of superposed metal meshes 6, 6,... Are stacked on the lower surface of the lowermost group S and the upper surface of the uppermost group S, respectively. A laminate 3 is formed.

  Each wire mesh 6 is formed with a plurality of meshes as openings, and when overlapped, a gap is formed between other wire meshes 6 adjacent to each other vertically, for example, a plain weave wire mesh, A woven wire mesh such as a twill woven wire mesh or a tatami woven wire mesh, a turtle shell wire mesh, a rhombus wire mesh, or a punching metal (punched wire mesh) is used. In particular, the tatami woven wire mesh is durable against compression and does not cause a flat mesh opening. Therefore, when the wood board 1 is softened by high-temperature high-pressure steam and crushed by the applied pressure in the fixing process P3. In addition, it is preferable because a passage (gap) of water vapor can be secured.

  Further, the number of the metal nets 6, 6,... To be stacked may be two or more, and particularly preferably three. Further, the plurality of metal meshes 6, 6,... Do not have to have the same number of meshes (mesh), and a plurality of types having different mesh numbers may be used.

  At this time, when a single metal mesh 6 is used, the front and back surfaces of the metal mesh 6 are sunk into the wood board 1 to inhibit the passage of steam, but a plurality of metal meshes 6, 6,. By using the member, the effect that the steam passes through the gap between the contact surfaces of the metal meshes 6 and 6 can be obtained.

  Note that the steam passage member is not limited to the wire mesh 6, and may have any number of openings so long as a gap is formed between the other steam passage member and the other steam passage member. . In particular, when using multiple stacked punching metals, if the front and back surfaces are flat, water vapor will not pass through them. Care must be taken to allow water vapor to pass between the punching metals when laminated.

  And each wooden board | plate material 1 is compressed so that it may become the target thickness or density by pressurizing the laminated body 3 of 1 or 2 or more of such wooden board | plate materials 1 to a lamination direction (up-down direction in FIG. 2).

  Compressing the wooden board 1 so as to have a target thickness means that the wooden board 1 is compressed so that the thickness of the wooden board 1 is larger than the thickness in the previous board compaction step P1, and the change in thickness is shown in FIG. Show. When the wood board 1 is consolidated from, for example, a thickness of 3.1 mm to a thickness of 1.5 mm in the previous board material compaction step P1, in the board material compression step P2, it is compressed to a thickness of, for example, 1.8 mm.

  On the other hand, compacting the wooden board 1 to a target density means compressing the wooden board 1 so that the density of the wooden board 1 is lower than the density in the previous board compacting step P1, and the change in density is illustrated. This is shown in FIG. The pressure is equivalent to the pressure in the previous plate material consolidation step P1, and is preferably 2 MPa to 9 MPa, for example.

  And in the board | plate material compression process P2, in order to pressurize the said laminated body 3 and compress each wooden board | plate material 1, the fixing jig 10 shown, for example in FIG. 3 is utilized. The fixing jig 10 includes a pair of pressure plates 10 and 10 that face each other, and bolts that extend in opposite directions of the pressure plates 10 and 10 are inserted into both ends of each pressure plate 10. Holes 12 and 12 are formed to pass through, and bolts 13 and 13 are inserted into the bolt insertion holes 12 and 12... At both ends of the pressure plate 10, respectively. The nut 14 is screwed. A plurality of the fixing jigs 10 are prepared, and the interval between the pressure plates 10 and 10 is widened, and the laminate 3 (the wood board 1 and the wire net 6) is placed between the pressure plates 10 and 10. It inserts so that the fixing jig 10 may be arrange | positioned at the both ends and intermediate part of the laminated body 3, respectively, and the space | interval between both the pressure plates 10 and 10 may be turned by turning the fastening bolt 13 and the nut 14 of each fixing jig 10. By narrowing, it presses in the lamination direction on both sides of the laminated body 3 with both the pressure plates 10 and 10, and compresses each wooden board | plate material 1 so that it may become the target thickness or density. In FIG. 3, reference numeral 15 denotes a washer member that prevents the head of the bolt 13 and the nut 14 from entering the pressure plates 10 and 10 when the tightening bolt 13 and the nut 14 are tightened. FIG. 2 shows both pressure plates 10 and 10 of the fixing jig 10.

  At this time, in the laminated body 3, the front surfaces 1a and 1a of the two wooden boards 1 and 1 of each set S are in contact with each other, and the metal nets 6, 6,... (Steam passage member) are in contact with the back surfaces 1b and 1b. Therefore, even if each wooden board | plate material 1 of the laminated body 3 is compressed, only the metal nets 6, 6, ... will enter into the back surface 1b of the wooden board | plate material 1, and the surface 1a can be kept beautiful.

  Note that the plate material compression step P2 is to press the laminated body 3 in the laminating direction and compress each wooden plate material 1 so as to have a desired thickness or density. Instead of using the fixing jig 10, You may make it pressurize the laminated body 3 by press apparatuses (not shown), such as a flat plate press, in the autoclave used in the subsequent fixing process P3.

(Immobilization process P3)
The immobilization process P3 is to heat-treat the wooden board 1 with high-temperature and high-pressure steam so that the thickness and density of each wooden board 1 compressed in the board compression process P2 are fixed to the thickness and density. High-temperature and high-pressure steam is allowed to act in the autoclave in the compressed state on each wooden board 1 of the laminate 3 pressed in the board compression process P2. Although not shown in the figure, the autoclave is a pressure-resistant container that can make the inside high pressure, and the laminated body 3 is placed in a pressurized state and filled with high-temperature and high-pressure steam. . In the immobilization treatment in the autoclave, the temperature of the high-temperature and high-pressure steam charged in the autoclave and acting on each wooden board 1 is set to 160 ° C. to 220 ° C., and the pressure (pressure in the autoclave) is set to 0.6 MPa, for example. It is preferable to set to ~ 2.3 MPa, and the processing time is set to 1 minute to 20 minutes.

  When the laminated body 3 is pressed in the laminating direction by the fixing jig 10 in the plate material compression step P2 and compressed so that each wooden board 1 has the desired thickness or density, the fixing jig 10 The pressed laminate 3 is carried into an autoclave and filled with high-temperature and high-pressure steam to fix each wooden board 1 to a desired thickness or density. In this case, the laminate 3 pressed by the fixing jig 10 in the previous plate material compression step P2 may be carried into the autoclave as it is (in a pressurized state) and subjected to the fixing process. It is only necessary to use an autoclave, and the configuration of the apparatus can be simplified.

  On the other hand, when the fixing jig 10 is not used, as described above, the laminated body 3 is pressed by a pressing device (not shown) such as a flat plate press in an autoclave, for example, and the pressed state is maintained ( Then, the same autoclave may be filled with high-temperature and high-pressure steam and the immobilization treatment may be performed by the action of the high-temperature and high-pressure steam. By doing so, the laminate 3 is pressurized in the autoclave and each wooden board 1 is compressed to the desired thickness or density, and high-temperature and high-pressure steam acts as it is, so that the board is compressed and fixed in the autoclave. Processing can be performed continuously, and production efficiency can be improved.

  At this time, in the laminate 3, a large number of meshes (between the set S of the two wooden board materials 1, 1 and the set S of the other two wooden board materials 1, 1 adjacent to the set S ( A plurality of plate-like metal meshes 6, 6,... (Steam passage members) having an opening) are disposed, and a gap is formed between the plurality of metal meshes 6, 6,. Therefore, when high-temperature high-pressure steam is applied to each wooden board 1 of the laminate 3 in the immobilization process P3, the high-temperature high-pressure steam passes through the gaps between the plurality of metal meshes 6, 6,. The high-temperature and high-pressure steam that has passed through the meshes of each metal mesh 6 is uniformly distributed to the compressed wooden board 1 and enters the wooden board 1 from the back surface 1b, or the back surface 1b is heated to heat the inside of the wooden board 1 Moisture is vaporized. This makes it possible to reliably and uniformly fix each wooden board 1 to a target thickness or density, although a plurality of wooden boards 1, 1,. As described above, since the laminated body 3 in which a plurality of wood board materials 1, 1,... Are stacked is compressed and fixed at a time to obtain a consolidated board material, the production efficiency of the consolidated board material can be improved and the compacting process can be simplified. This can be done at low cost using a structured device.

  In particular, if the number of the metal meshes 6, 6,... To be stacked is three, a total of two gaps are formed between the three metal meshes 6, 6,. It can be made easier to pass.

  In addition, when the metal mesh 6 arrange | positioned at the back surface 1b side of the wooden board | plate material 1 in the laminated body 3 is made into 1 sheet, the amount of compressive deformation of the back surface 1b (contact surface of the metal net 6) of the wooden board | plate material 1 in board | plate material compression process P2 is. When it becomes larger, the wooden board 1 tends to swell by the high-temperature and high-pressure steam before being fixed in the fixing process P3, so there is no gap between the back surface 1b of the wooden board 1 and the wire mesh 6, and the superheated steam Becomes worse. Therefore, it is necessary to interpose a plurality of wire meshes 6, 6,.

  Moreover, in the board | plate material compaction process P1, after consolidating each wood board | plate material 1 so that it may become thinner than the target thickness or it may become higher than the target density, in the next board | plate material compression process P2, several wood board materials 1, 1,... Are formed by compressing each wooden board 1 so as to have a desired thickness or a desired density, and fixing it, so that the wooden board is made by the amount consolidated in the board compacting step P1. When the volume of 1 is reduced and it is placed in an autoclave for immobilization, the carry-in amount increases once, which can increase production efficiency.

(Cooling process P4)
In the cooling step P4, the laminated body 3 after the immobilization treatment is pressurized to keep the wood board 1 in a compressed state, and the pressure in the autoclave is lowered and left to cool as it is or 100 ° C. is applied. It cools to the following and puncture is prevented by liquefying the internal water vapor of the wood board 1.

  At this time, the steam inside the wood board 1 also escapes through the gaps between the wire nets 6, 6,..., So that puncture can be prevented efficiently and production efficiency can be further increased.

  Thereafter, the laminate 3 is taken out of the autoclave and decomposed into the respective wooden boards 1. Each wooden board 1 is a consolidated board.

  In this embodiment, the plate material consolidation step P1 is first performed, and the wood plate material 1 is individually consolidated so as to be thinner than the target thickness or higher than the target density, and the next plate material compression step P2 is performed. Then, a plurality of consolidated wood board materials 1 are laminated and compressed through wire meshes 6, 6,... (Steam passage members), and in the compression, the wood board material 1 is made to have a desired thickness or density. Compressed. Thus, after each wooden board | plate material 1 is individually consolidated so that it may become thinner than the target thickness, or it may become higher than the target density, the laminated body 3 of those wooden board | plate materials 1 is formed, and the wooden board | plate material 1 is used. Since it compresses so that it may become the target thickness or the target density, and it fixes, the consolidation process and the fixing process of the wooden board | plate material 1 will be isolate | separated. Thus, as in the case where the plate material consolidation step P1 is not performed, the wood plate material 1 can be used without using a large-sized autoclave processing device or an autoclave device with a built-in press device for uniformly compacting the inside of the wood plate material 1. Thus, a compacted plate with stable quality can be obtained by eliminating the unevenness of compression in the thickness direction.

  That is, after each wood board 1 is individually consolidated so as to be thinner than a target thickness, a laminate 3 of the wood boards 1 is formed, and the wood board 1 is compressed to a target thickness and fixed. By carrying out the conversion treatment, a consolidated plate with high dimensional accuracy and stable quality can be obtained.

  On the other hand, after each wooden board 1 is consolidated so as to be higher than the target density, a laminate 3 of the wooden boards 1 is formed, and the wooden board 1 is compressed to the target density, and then fixed. By doing so, a consolidated plate material with high dimensional accuracy, stable quality, and low density unevenness can be obtained.

  Further, since the steam can be applied to the entire surface of the plurality of wood plates 1, 1,... Subjected to the treatment, particularly compression fixation of the vicinity of the surface can be realized.

  In addition, since the single-layered or multi-layered laminate 3 can be treated at a high temperature and high pressure steam through the wire mesh 6, the efficiency is improved.

(Other embodiments)
In the above embodiment, the immobilization process is performed by an autoclave. However, a closed processing apparatus is manufactured by a flat plate press and a mold, and a laminated body in which a wooden board is laminated is placed inside the laminated body. The body may be treated with high-temperature steam.

  Next, specific examples will be described. The wood board is a red pine veneer having a thickness of 3.1 mm, a width of 100 mm, and a length of 300 mm. First, 20 red pine veneers are each consolidated by a hot press roll at 180 ° C. until the thickness becomes 1.5 mm. A plate was obtained (plate material consolidation step).

  Two of the 20 compacted single plates were combined into 10 groups, and the surfaces (decorative surfaces) of the consolidated single plates were mated in each group. Then, 10 sets of compacted single plates are stacked in a stacked state, and three flat woven wire meshes (steam passage members) are interposed between two adjacent upper and lower sets, and the upper surface of the uppermost set The same three tatami woven wire meshes were also arranged on the lower surface of the lowermost set to form a laminate (see FIG. 2). The three plain woven wire meshes are 100 meshes for the two upper and lower wire meshes, and 50 meshes for the central one wire mesh. This laminated body was pressurized using the fixing jig shown in FIG. 3, and each consolidated single plate was compressed to a thickness of 1.8 mm (plate material compression step).

  Next, the laminate of the compacted single plate is put into an autoclave while being pressed by a fixing jig, and the autoclave is filled with high-temperature and high-pressure steam to perform fixing treatment, and then taken out from the autoclave and stacked. Was decomposed to obtain a compacted veneer. As immobilization treatment conditions, the temperature was raised from room temperature to 180 ° C. over 5 minutes, held at 180 ° C. for 15 minutes, then returned to vapor pressure over 5 minutes, and lowered to 100 ° C. or lower.

  The 20 compacted veneers thus obtained were each cured overnight in an environment of a temperature of 20 ° C. and a relative humidity of 60%, and then cut at the central position in the length direction, and the width of the veneer at the cut surface. The thickness at the center of the direction (thickness at the center of the length and width) was measured and set as the thickness A after immobilization.

  Next, the half-consolidated veneer after the division is boiled for 20 minutes, dried for 2 hours with a dryer at 105 ° C., and then cured overnight in an environment at a temperature of 20 ° C. and a relative humidity of 60%. The thickness of the position was measured and set as thickness B after the boiling test. And the dimension recovery rate was calculated | required with the following formula | equation. The dimensional recovery rate is an index that represents the degree of fixation of the consolidated wood, and the smaller the amount, the more fixed and the more stable the dimensional change is.

Dimension recovery rate (%) = {(BA) / (original thickness 3.1 mm-A)} × 100
FIG. 6 shows the relationship between the lamination position (layer) from the lower stage in the laminated body of each consolidated single plate and the dimensional recovery rate of the consolidated single plate.

  Further, in the sheet compression process, when 10 sets of compacted single sheets are stacked in a stacked state, a laminated body in which only one flat woven wire mesh (50 mesh) is interposed between adjacent two upper and lower sets. The only difference was that they were compressed with a fixing jig, and the others were processed in the same manner as described above, and the thickness A after fixation and the thickness B after boiling test were measured. The dimensional recovery rate is calculated, and FIG. 6 shows the relationship between the stacking position in the laminated body of each consolidated single plate and the dimensional recovery rate of the consolidated single plate.

  According to FIG. 6, when there is one wire mesh, the dimensional change rate of the consolidated single plate is large in any layer of the laminate, and particularly the dimensional recovery rate is large near the center of the laminate (7th to 15th layers). . On the other hand, when three metal meshes are stacked, the dimensional recovery rate of the compacted single plate is low at any position of the stacked body, and is at most 6%. This dimensional change rate of 6% corresponds to a bulge of 0.1 mm or less, and it can be said that the immobilization is sufficiently performed when the compacted single plate is used as a flooring material, for example.

  That is, by using three wire meshes in a stacked manner, a sufficient passage of high-temperature and high-pressure steam is secured in the gap between the wire meshes, and the compacted veneer can be sufficiently fixed to the inside even in a boiling test for 20 minutes. I understand.

  The present invention can reliably and uniformly fix each wooden board to a target thickness or density to a laminate in which a plurality of wooden boards are laminated, and can increase the production efficiency of the compacted board, Useful.

P1 Sheet material compaction process P2 Sheet material compression process P3 Immobilization process P4 Cooling process 1 Wood board material 1a Front surface 1b Back surface 3 Laminate 6 Wire mesh (steam passage member)
10 Fixing jig

Claims (6)

A method for producing a consolidated board by compressing a wooden board,
Two wooden boards stacked so that the respective surfaces come into contact with each other are stacked through a plurality of plate-like steam passage members which are stacked on each other and have a large number of openings to form a laminate 1 or 2 By laminating the above laminates and pressurizing in the laminating direction, a plate material compression step for compressing each wooden plate material to have a desired thickness or density;
An immobilization treatment step of fixing each wood board material to a desired thickness or density by allowing high-temperature and high-pressure steam to act on each wood board material of the laminate pressed in the board material compression process in its compressed state. A method for producing a consolidated plate material, comprising: In claim 1,
Before the plate compression step, each wood plate is provided with a plate compression step that compresses each wooden plate so that it is thinner than the target thickness or higher than the target density.
In the plate material compressing step, the wood plate material compacted in the plate material compacting step is compressed so as to have a target thickness or density. In claim 1 or 2,
In the plate material compression step, one or two or more laminates are laminated with a fixing jig, pressed in the lamination direction, and compressed so that each wooden plate material has a desired thickness or density,
In the fixing treatment step, the laminated body that has been pressed by the fixing jig is carried into an autoclave, and each wooden board is fixed to a desired thickness or density by high-temperature and high-pressure steam. Production method. In claim 1 or 2,
In the plate material compression step, one or two or more laminates are laminated by a press device in an autoclave, and each wood plate material is compressed to a desired thickness or density by pressing in the lamination direction.
In the immobilization process, each wooden board is fixed to a desired thickness or density by high-temperature and high-pressure steam in the same autoclave while the laminate is still pressed by the press device, and a consolidated board is produced. Method. In any one of Claims 1-4,
The method for producing a consolidated plate material, wherein the steam passage member is a wire mesh. In any one of Claims 1-5,
The manufacturing method of the compact board | plate material characterized by the number of the plurality of steam passage members being three.

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