JPH08155918A - Manufacture of aggregation - Google Patents

Abstract

PURPOSE: To provide a method of manufacturing a high-quality aggregation at a low cost by preventing the internal tissue of an aggregation from breaking down to improve its quality, and realizing a highly efficient operation and the easing of maintenance services for a manufacturing device by employing two independently separate sits of a manufacturing device instead of a single sit for the enhancement of mass-productivity. CONSTITUTION: Each lumber from thinning 2 is molded one by one in a compression- molding device 40 and is dried to reduce the moisture content of each lumber from thinning 2. Thus, its specified shape is temporarily set. In addition, the material is thermally treated by vapor under high pressure using a permanently setting device to set its specified shape permanently. The internal tissue of an aggregation is prevented from breaking down by thermal treatment under a low moisture content state. Further, it is possible to simplify the device for treating each lumber from thinning 2 because it is treated by two independently separate sits instead of a single unit as the compression-molding device 40 and the permanently setting device. Besides it is possible to enhance the thermal efficiency significantly, reduce the operating volume and maintenance services, and utilize the existing equipment. Each lumber from thinning 2 is adhered to the other by clamping using an adhesive to obtain the aggregation.

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 an aggregated material in which a plurality of thinned woods or the like are molded one by one and then integrated, and in particular, the internal structure of the aggregated material is prevented from being destroyed and its quality is improved. The present invention also relates to a manufacturing method capable of improving mass productivity by improving efficiency by separating manufacturing devices and facilitating work and maintenance, thereby obtaining a high quality and low cost aggregate material.

[0002]

2. Description of the Related Art In general, small-thinning thinned trees, short lengths, and mill ends removed during the growth process of conifers such as cedar and cypress are widely used as building materials, but they are robust because they are soft materials by nature. It was less frequent and there was naturally a limit to its usable range. In particular, in the growing process of cedar, cypress, etc., it is a small diameter tree, and since it is often extremely soft and curved, such a thinned wood could hardly be used as a building material such as a pillar.

In order to make effective use of such thinned wood,
Conventionally, various methods have been proposed. For example, in Japanese Unexamined Patent Publication No. 5-116112, a composite wood pole is formed by chamfering a plurality of thinning materials in advance into a wedge-shaped quadrangular wood pillar material, and assembling the quadrangular wood pillar materials by bonding them with an adhesive. The materials are listed.

Further, in Japanese Examined Patent Publication No. 4-4, a large number of softened small diameter trees are integrally compression-molded in a state in which an adhesive is applied to expand the adhesive area, and then the adhesive is compressed until it hardens. An adhesive molding method is described in which a small diameter tree is adhesively molded by maintaining the state. In addition, when carrying out such an adhesive molding method for small-diameter trees, in order to stabilize the shape of the wood in order to plasticize it, wood softening treatment such as boiling is performed while each wood is compressed and held by a formwork or the like. Is also described.

Furthermore, the applicant of the present invention previously filed Japanese Patent Application No. 5-28.
5907, etc., softening a plurality of thinned wood, applying an adhesive to the softened a plurality of thinned wood to assemble, heating, pressurizing, and then performing a fixing treatment It proposes a method of manufacturing an aggregate material, which is excellent and can be used over a wide range and at low cost.

[0006]

However, the composite wooden pole material described in the above-mentioned Japanese Patent Laid-Open No. 5-116112 is constructed by adhering a plurality of thinning materials to each other with an adhesive. In order to form the wood pillar material into a predetermined shape (for example, a quadrangular shape), it is necessary to chamfer each thinning material in advance to form a wedge-shaped quadrangular wood pillar material. As described above, it is a very complicated work to perform the chamfering process on each thinned material in advance, and there is a problem that the cost becomes high accordingly.

The method for adhering small-diameter trees described in Japanese Patent Publication No. 4-4 is effective for securing a more stable adhesive strength with respect to the strength of many integrated small-diameter trees. In order to stabilize the shape of large diameter trees, heat treatment is performed in a state where the water content of small diameter trees is high without special treatment such as reducing the water content of each small diameter tree. There is a problem in that the quality of the product is deteriorated due to the breakage, cracking and puncture.

Furthermore, the aggregate material produced by the manufacturing method described in Japanese Patent Application No. 5-285907 can be used in a wide range as a building material due to its excellent properties. However, it is necessary to perform various treatments for fixing the aggregated material with the same device having a pressing function for the pressure vessel. Therefore, the pressure-resistant container needs to secure a press stroke, so that the pressure-resistant container becomes large in size, and as a result, the thermal efficiency in the fixing (heating) process is affected. Further, the above-mentioned device is expensive because the mechanism is complicated, and the burden on the work and maintenance thereof is heavy, so that it is not possible to contribute to the remarkable progress of mass productivity.

The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to improve the quality by preventing the destruction of the internal structure of the aggregate and to improve the work efficiency by separating the apparatus. It is an object of the present invention to provide a manufacturing method capable of improving productivity and improving mass productivity by facilitating maintenance of a manufacturing apparatus, and thereby obtaining a high quality and low cost aggregate material.

[0010]

In order to achieve the above object, the invention according to claim 1 comprises a first step of softening a plurality of pieces of wood and a predetermined compression for each piece of softened wood. The second step of performing compression molding processing at a fixed rate to perform temporary fixing processing, the third step of performing permanent fixing processing of the shape of each temporarily fixed wooden piece, and the application processing of an adhesive agent on the surface of each temporarily fixed wooden piece. And a fifth step of curing the adhesive applied to each piece of wood to integrate the pieces of wood.

At this time, the second aspect of the invention according to claim 1
The compression molding process performed in the step is performed by over-compressing each of the woods at a compression rate higher than the predetermined compression rate and then returning the compression rate to the predetermined compression rate. Similarly, in the temporary fixing process, cooling is performed after drying each of the woods. Further, similarly, the compression molding process and the temporary fixing process are performed through the same compression molding device. Further, in the permanent fixing treatment performed in the third step of the invention according to the first aspect, each of the woods is heated under high pressure through steam.

[0012]

In the first aspect of the present invention having the above-mentioned structure, in the first step, a plurality of pieces of wood (for example, thinned wood) are softened. Here, the softening treatment is performed in order to facilitate the deformation of the wood in the compression molding treatment of the second step described later.

In the subsequent second step, after each softened piece of wood is placed in the mold, a compression molding process is performed with a predetermined compression rate, that is, a predetermined shape. The compression rate referred to in the present invention is preferably about 10 to 55%.
The reason for this is that if it is less than 10%, the wood cannot be sufficiently adhered to cause a gap between the wood, and if it exceeds 55%, the hardness becomes too high and it is difficult to process. Because it will be. Furthermore, a temporary fixing process is performed to reduce the water content of each piece of wood that retains a predetermined shape. That is, the water content (moisture content) inside each piece of wood is reduced to a predetermined value to temporarily fix the shape.

In the compression molding process, a method is effective in which each piece of wood is over-compressed at a compression rate higher than a predetermined compression rate and then gradually returned to a predetermined compression rate. Overcompression refers to an operation of compressing to a compression rate relatively higher than the desired compression rate and then returning to the desired compression rate. According to such a method of over-compressing, the water content of each piece of wood can be reduced as compared with the case where only a predetermined compression is performed, and the time required for lowering the water content in the temporary fixing process can be shortened.
In the temporary fixing treatment, a method of heating and drying each wood is effective in reducing the water content. Since the drying is performed while maintaining a predetermined shape, it is performed by heating the press upper and lower surface plate and the side wall of the mold (as a heat source, a heat medium such as an electric heater, steam or oil). High frequency,
Internal heating combined with microwave heating is also effective. According to such a drying method, the water content of each piece of wood is reduced to a value that can be temporarily fixed at an internal temperature of the aggregate of about 30 ° C. After that, each wood is forcibly cooled to room temperature. This is because it is effective for early obtaining wood whose shape is temporarily fixed. Most of the time required for the temporary fixing treatment is the drying time of each piece of wood, which is a long time and thus the rate of the manufacturing time of the aggregate. Therefore, by forcibly cooling and obtaining each temporarily fixed timber, the manufacturing time of the aggregate can be greatly shortened.

The compression molding process and the temporary fixing process can be performed through the same compression molding device. If the same apparatus is used, the temporary fixing process can be performed while maintaining the shape of the compression molding process, so that it is possible to easily obtain each temporarily fixed timber excellent in dimensional stability and shape stability. .

Further, in the third step after the completion of the second step, the wood that has been temporarily fixed is retained by the compression molding process and heated under high pressure through steam to permanently fix it. Processing is performed. This makes it possible to easily obtain each piece of wood whose shape is permanently fixed.

In the following fourth step, an adhesive is applied to the surface of each wood which has been permanently fixed while maintaining the shape of the compression molding process. Here, the adhesive is for binding and integrating the woods with each other.

Finally, in the fifth step, the woods to which the adhesive has been applied are laminated and pressure-bonded by polymerization. As a result, the adhesive is hardened to obtain an aggregate material in which the wood pieces are integrated into a predetermined shape. As described above, the aggregate material whose shape is permanently fixed is manufactured.

By introducing a temporary fixing treatment, the aggregate produced by the invention according to the above-mentioned claim 1 becomes a state in which the water content of each wood is low because the drying is carried out in the same treatment, and under the high pressure in the permanent fixing treatment. The destruction of the internal tissue of each wood due to the heating of steam in the above will not occur. This makes it possible to improve the quality of the aggregate material. Also,
It is possible to temporarily collect and store each temporarily fixed timber in another place. Therefore, by performing the temporary fixing process and the permanent fixing process by separate simple devices, it is possible to avoid waste of volume and heat, which are inevitable when the temporary fixing process and the permanent fixing process are performed by the same device. Also, existing equipment can be used, and work efficiency and maintenance of manufacturing equipment can be facilitated. As a result, mass productivity can be improved, and the aggregate material and its production cost can be significantly reduced.

Next, the aggregate according to the present invention will be described with reference to FIG. FIG. 1 is a perspective view schematically showing the aggregated material. In FIG. 1, the aggregated material 1 includes a plurality of softened thinned materials (6 in the aggregated material 1 of FIG. 1) for each thinning material 2. After compression molding, and further temporary fixing and permanent fixing, the thinning materials 2 are laminated with the adhesive 3 interposed therebetween and superposed by polymerization pressure. Here, each thinning material 2 is the thinning material removed from the growth process of cedar, cypress, etc., and each thinning material 2 has a front end 2A of about 15 cm,
Thinning material 2 with a relatively uniform diameter whose end 2B is about 10 cm
Is used, and the main opening 2A and the end opening 2B are arranged alternately.

Specific examples of the thinned wood 2 used include cedar, cypress, red pine, black pine, larch, hime komatsu, ezo pine, todo pine, koyamaki, sawara,
Conifers and zelkova such as fir, Hiba, Neko, Inusaki, Tsuga, Kaya, Togasawara, Yew, etc., Mizunara, chestnut, Shioji, cous, kiri, red oak, shirakashi, kunugi, oyster, beech, cypress, yachidamo, linden, sawawami, aodamo , Maple tree, cherry tree, alder tree,
Cistanche, Horse chestnut, Doroki, Asada, Taboki,
Hardwoods such as Harunire, Onigurumi, Katsura, honoki, mizume, mackerel, camphor tree, yamawawa, inuenje, hariri, hirohanokihadha, shiroikura, udaikanba, kenponashi, etc. are suitable, but cedar, cypress, pine, zelkova, zelkova, oak, numer, The beech is preferable as the material of the present invention in terms of design and abrasion resistance.

[0022] Also, as foreign products, teak, akarawan, nato, champaca, mangasinoro, peckle, dao, honshitan, rosewood, koktan, durian,
Camelele, Mersawa, Ramin, Vatican, Kapole,
Merantich, Parosapis, Radiata pine, Taihi, Agathis, Apiton, Karin, New Guinea walnut, Queensland walnut, Monkey pot, Silky oak, Tamakura, Brazilian rose, Molard, Mahogany, Corvalli, Primavera, Axugi,
Black walnut, spruce, clara walnut, sugi, beihi, bay pine, zebra, wenge, mansonia, iroko, macore, satinwood, afara, abra, izigbo, sapele, homme, ironba, wawabima, bubinga, danta, ovancole, black Beans, yakars, jeltons, asams, gencons, sepetils, matoas and gum trees are suitable. In the present invention, pine, cypress, cedar, zelkova, kunugi, oak, and beech are particularly preferable. The reason for this is that these tree species tend to soften when heated.

Further, each softened thinning material 2 is deformed more than expected, and it is easy to enter into the narrow gap between each other, and various characteristics can be freely changed by changing various predetermined compressibility. it can. Furthermore, by combining with metal materials such as aluminum and iron, ceramic materials such as alumina and silicon nitride, carbon fibers, silicon carbide fibers and alumina silica fibers, and plastic materials such as nylon and tetron, the strength and heat resistance can be adjusted freely. can do.

As shown in FIG. 1, the thinning materials 2 are laminated in the same fiber direction, and when the thinning materials 2 are arranged so that the front end 2A is on the end face side, the thinning materials 2 are lined up with the thinning material 2. The thinned wood 2 is arranged so that its end 2B is on the end face side of the aggregate 1. By arranging the thinning materials 2 in this way, it is possible to obtain an aggregate material 1 having a uniform compression density in the produced aggregate material 1.

The adhesive 3 is for binding the thinning materials 2 to each other, and various kinds of adhesives can be used as the adhesive used in the present invention. For example, a thermosetting adhesive such as a phenol-based adhesive containing a phenol resin as a main component or a resorcinol-based adhesive containing a resorcinol resin as a main component is preferably used. In addition, as the thermosetting adhesive, a melamine-based adhesive containing melamine resin as a main component, a urea-based adhesive containing urea resin as a main component, an epoxy-based adhesive containing epoxy resin as a main component, etc. should also be used. You can In addition to the thermosetting adhesive, an aqueous polymer containing isocyanate and an aqueous polymer as main components-
Isocyanate adhesives, vinyl acetate resin adhesives, etc. can also be used. Here, when selecting the adhesive 3 to be used, the cost of the adhesive 3, the type of solvent, and the aggregate 1
It is desirable to select it in consideration of the purpose of use.

Next, a manufacturing method for manufacturing the aggregate material 1 configured as described above will be described. In this manufacturing method, a first step of softening a plurality of thinned lumber 2 is performed, and each softened thinned lumber 2 is compression-molded one by one with a predetermined compression rate to obtain a water content of each thinned lumber 2. Second step of performing a temporary fixing process for reducing the temperature, a third step of performing a permanent fixing process of the shape of each thinning material 2 that has been temporarily fixed, a coating process of an adhesive 3 on the surface of each thinning material 2 that has been permanently fixed And a fifth step of curing the adhesive 3 of each thinned wood 2 that has been applied to integrate the thinned wood 2 into a unit.

First, the softening (heating) treatment performed in the first step will be specifically described with reference to FIGS. Here, FIG. 2 is an explanatory view schematically showing a state in which each thinning material 2 is heat-treated by a steam heating device, and FIG. 3 shows a state in which the thinning material 2 is heat-treated by boiling in a water tank filled with hot water. FIG. 4 is a schematic explanatory diagram, and FIG. 4 is a schematic diagram illustrating a state in which the thinning material 2 is heat-treated by a high-frequency heating device.

First, a method of performing heat treatment with the steam heating device shown in FIG. 2 will be described. The steam heating device 10 has a cylindrical heating container 11, and the heating container 11 has a steam injection port 12 for injecting steam into the heating container 11.
(Left side in FIG. 2) and an exhaust port 13 (upper side in FIG. 2) for discharging internal steam to the outside of the steam heating device 10 are provided. In this steam heating device 10, the exhaust port 1
The inside of the apparatus 10 and the atmosphere are communicated with each other via 3.
A plurality of thinning materials 2 are laminated inside the steam heating device 10 with a partition plate 14 interposed therebetween. Each partition plate 14 serves to position each thinning material 2 so as not to move in the device 10.

Here, the inside of the apparatus 10 is heated to 70 ° C. to 160 ° C. by the heated steam injected from the steam injection port 12 into the apparatus 10. Preferably, it is injected intermittently with a steam pressure of about 1 kgf / cm ² to maintain the temperature in the apparatus 10 at about 80 ° C to 100 ° C. The heating time is set to about 6 hours.

In order to heat-treat each thinning material 2 with such a steam heating device 10, a plurality of thinning materials 2 are stacked in the device 10 via each partition plate 14, and then the steam injection port 12 is used. Water vapor is injected intermittently. Thus, each thinning material 2 is softened uniformly while injecting water vapor.

Next, a method of heating each thinned material 2 by boiling in boiling water will be described with reference to FIG. In FIG. 3, the water tank 20 is filled with hot water 21,
A net 22 such as a wire net containing a plurality of thinning materials 2 is immersed in the hot water 21. A lid 23 is attached to the water tank 20. The lid 23 closes the upper part of the water tank 20 during the heat treatment of each thinning material 2 to remove the hot water 2 in the water tank 20.
This is for preventing the temperature of 1 from dropping.

Here, the hot water 21 to be filled in the water tank 20 may be boiling water at 60 ° C. or higher, but considering long-term treatment, the temperature is preferably set within the range of 90 ± 5 ° C., and if necessary, the heater. The temperature control may be performed by internally providing. Further, the heating time of each thinned material 2 is required to be about 1 to 6 hours.

Using such an aquarium 20, each thinning material 2
In order to perform the heat treatment of No. 2, after filling the water tank 20 with the hot water 21 heated to 90 ± 5 ° C., the net 22 containing the plurality of thinned woods 2 that have been peeled in advance is put in the water tank 20 through a crane or the like. It is placed inside and immersed in boiling water 21. And the lid 23
After the upper part of the water tank 20 is closed at, heat treatment is performed for about 1 to 6 hours. As a result, each thinned material 2 is softened uniformly.

Further, a method of heat-treating each thinning material 2 with a high-frequency heating device will be described with reference to FIG.
In FIG. 4, the high-frequency heating device 30 has an electrode plate 32 arranged in a plurality of stages inside the device body 31, and a plurality of thinning materials 2 are placed on each electrode plate 32. There is.
Further, a high frequency oscillator 33 is provided on the upper part of the device body 31, and a control device 3 for controlling the high frequency oscillator 33 is further provided on a side part (left side part in FIG. 4) of the device body 31.
4 is attached.

[0035] Here, the frequency of the high frequency oscillated from the high frequency oscillator 33 is set to 13.56MH _Z,
The output is set to 600W. Further, the time of the high frequency induction heating performed by the high frequency oscillator 33 is set to about 1 hour.

In order to heat each thinning material 2 with such a high frequency heating device 30, a plurality of thinning materials 2 are placed on each electrode plate 32 arranged in the main body 31 of the device. After that, the high frequency oscillator 33 is driven through the control device 34 under the above-mentioned conditions. As a result, each thinned wood 2
Is heated by the high frequency generated from the high frequency oscillator 33 and uniformly softened. It is also effective to heat each thinning material 2 by microwaves instead of the high frequency heating device 30.

Next, the second step of performing compression molding processing and temporary fixing processing on each thinned material 2 that has been subjected to the softening processing of the second step will be described with reference to FIGS. 5 and 6. Here, FIG.
Is an explanatory view schematically showing a state before performing compression molding processing for each thinned wood 2 by the compression molding device, and FIG. 6 shows compression molding processing for each thinned wood 2 by the compression molding device. It is explanatory drawing which shows typically the state which performs and the state which performs a temporary fixing process.

First, the structure of the compression molding device 40 used in the second step will be described with reference to FIG. In the compression molding device 40, the press die 4 is placed on the press surface plate 55.
1 is installed. A plurality of independent press parts 41A are formed in the press die 41, and each thinning material 2 is compression-molded into a predetermined shape in cooperation with a press die 42 described later. Further, on the outer surface of the outer wall of the press die 41 or on the inner surface or the lower surface of the press platen 55, a sheet heating element 45 (for example, an electric heater or a steam) is provided to dry each thinned material 2 placed. Or a heat medium such as oil) is attached. Further, a plurality of evaporation holes 47 are formed in the press die 41 and the sheet heating element 45, and water vapor and water generated from the thinning material 2 pass through each evaporation hole 47.

A press cylinder 44 is installed above the compression molding device 40. Below the press cylinder 44, a press surface plate 56 is connected and installed via a press rod 43. As a result, when the compression molding process described later is performed, the press rod 43 is moved downward via the press cylinder 44, and the press platen 56 and the press die that abuts against the press platen 43 as the press rod 43 moves. 42 presses each thinning material 2 from above. In addition, on the upper surface or inside of the press surface plate 56, a sheet heating element 46 (for example, an electric heater, for drying each thinned material 2 placed in the press die 41).
Heat medium such as steam or oil) is installed. Further, a plurality of evaporation holes 48 are formed in the press platen 56, the press die 42, and the planar heating element 46,
Water vapor generated from each thinning material 2 passes through each evaporation hole 48. Here, the pressure exerted on the press rod 43 from the press cylinder 44 configured as described above is changed according to the compression ratio of each thinning material 2, for example, a compression ratio of 5
15kgf / cm ^{2 at} 0%, 10k at compression rate 30%
It is set to gf / cm ² .

The compression molding device 4 configured as described above.
0 is used to perform compression molding processing on a plurality of softened thinning materials 2. First, a plurality of softening-processed thinning materials 2 are placed one by one in a plurality of independent press parts 41A in a press die 41. Alternatively, pieces of wood obtained by cutting the thinned material 2 in the longitudinal direction may be placed one by one. After that, each thinned material 2 is compression-molded at a predetermined compression rate. In this compression molding process, first, the press rod 4 is passed through the upper press cylinder 44.
3, the press platen 56 and the press die 42 that abuts against the press platen 3 pressurize and compress each thinning material 2 from above with a predetermined pressure. At this time, since each thinned material 2 is in a softened state, it is easily compressed by each press die 41, 42. As shown in FIG. 6, the press die 42 stops after moving to the position AA ′ corresponding to the predetermined compression rate.

At this time, it is also effective to excessively compress each thinning material 2 based on a compression rate higher than a predetermined compression rate and then gradually return to a predetermined compression rate. Each thinned material 2 having a high water content still contains a large amount of water after being subjected to the compression molding treatment, although it is slightly reduced, so that it takes a long time to dry in the temporary fixing treatment described later. Therefore, the water content is reduced by over-compressing each thinning material 2, that is, the water content in each thinning material 2 is reduced, and the drying time described later is shortened. Further, the pressing die 42 is gradually moved because when the pressing die 42 is immediately returned to a predetermined position (compressibility) in a state where the internal stress of each thinning material 2 is high, This is because cracks and the like may occur and the strength and the like may decrease. Specifically, as shown in FIG. 6, a compression rate higher than a predetermined compression rate (for example, about 30% and position A-A ') (for example, about 60% and position B-A').
This is a process of gradually returning to a predetermined compression ratio after excessive compression based on B ').

Subsequently, a temporary fixing process for each thinning material 2 is performed using the compression molding device 40. The temporary fixing treatment is to temporarily fix the predetermined shape, that is, the shape at the time of compression molding treatment, by forming a hydrogen bond between the molecules of the constituent components by lowering the water content of each thinning material 2. It is to be. Specifically, as shown in FIG. 6, each thinning material 2 is dried in a state where the press die 42 at the time of the compression molding process described above is held at the position AA ′ corresponding to the predetermined compression rate. This lowers the water content. For drying, the press die 41 and each press platen 55, 56 are attached to the sheet heating elements 45, 46.
By heating each through. The water vapor and moisture of each thinning material 2 that evaporates during drying is set in each evaporation hole 47,
It passes outside through 48. At this time, as the conditions for performing the above-mentioned drying, the higher the heating temperature is, the more effective it is. However, if the drying is performed at a high temperature for a long time, the strength may be reduced, discoloration, etc. may occur. Although it depends on the temperature, about 150 ° C is desirable. In addition, as a guide for the completion of drying, for the reason described below in the cooling condition, the upper limit of the water content that can temporarily fix the shape at 30 ° C. is 35% or less, and the thinning material 2 is It is desirable that the water content be high.

Further, forcibly cooling the thinned wood 2 after the drying is effective in shortening the time required for the temporary fixing process. Specifically, as shown in FIG. 6, each thinning material 2 was dried in a state in which the press die 42 during the compression molding process described above was held at the position AA ′ corresponding to the predetermined compression rate. Then, each thinned material 2 is cooled by the press die 41 and each press surface plate 55, 56. Cooling of the press die 41 and each of the press surface plates 55 and 56 is carried out by passing cooling water or air through a pipe and forcibly cooling each.

At this time, as a condition for performing the above-described cooling, the internal temperature of each thinned wood 2 whose water content has been reduced to 35% or less by drying is cooled to 30 ° C. or less. The drying temperature depends on the size of each thinning material 2, but it is 150 ℃
It is carried out in the vicinity, but in such a high temperature range (100 ° C. or higher), the shape cannot be temporarily fixed at the drying temperature unless the water content falls to 15% or less.
Therefore, the press die 42 is at the position A corresponding to the predetermined compression rate.
By maintaining the state held at −A ′ until the end of cooling, it is possible to prevent the recovery of the shape in the high temperature range at the drying temperature even if the water content does not reach 15% or less. It can be temporarily fixed in a predetermined shape, that is, in a compression-molded state. In addition, this operation makes it possible to reduce the drying time until the water content falls from 35% to 15% or less. Therefore, by shortening the cooling time by the forced cooling and reducing the drying time, the time required for the temporary fixing process, which is the rate-determining time for the manufacturing time of the aggregate 1, can be significantly shortened.

After the cooling is completed, the press cylinder 44
The press rod 43 is moved upwards via the, so that the press surface plate 56 and the press die 42 are moved upward. Then, each thinned material 2 in the press die 41 is taken out of the compression molding device 40. Each thinned wood 2 taken out is
In the temporary fixing process, since it is temporarily fixed to the same shape and cooled to 30 ° C. or less, it is easy to handle. Therefore, it is possible to store a large amount of the thinned wood 2 taken out, and therefore, it is possible to supply a large amount of the thinned wood 2 to a permanent fixing process described later, which is suitable for mass productivity. Further, the temporarily fixed thinning material 2 can be obtained early as a product for another purpose.

Next, a third step of permanently fixing the thinned wood 2 whose shape is temporarily fixed will be described with reference to FIGS. 7 and 8. Here, FIG. 7 is an explanatory view schematically showing a state in which the shape of the thinned wood 2 is held, and FIG. 8 schematically shows a state in which the thinned wood 2 is permanently fixed while being held in a predetermined shape by a permanent fixing device. FIG.

The permanent fixing treatment is to release the elastic energy accumulated by the deformation during the compression molding treatment by heating in each thinning material 2 whose shape is temporarily fixed, so that the shape of each thinning material 2 is made permanent. It is a process to fix it physically. Since each thinned material 2 is accompanied by a temporary recovery phenomenon of deformation by heating,
As shown in FIG. 7, the clamp 50 heats the four surfaces other than the end surface 4 in a held state 51. The clamps 50 are inexpensive, and the holding by the clamps 50 is an easy work. Further, since the thinning materials 2 have the same shape, they are stacked as shown in FIG. be able to. Therefore, when a large amount of thinned wood 2 is handled, it is very excellent in workability and economics and suitable for mass production.

Next, the structure of the permanent fixing device 70 used in the third step will be described with reference to FIG. The permanent fixing device 70 has a permanent fixing device main body 71 composed of a cylindrical pressure-resistant container, and a pair of steam injection nozzles 72 are provided in the upper part of the inner side of the permanent fixing device main body 71 in the longitudinal direction of the permanent fixing device main body 71. It is arranged along. Each steam injection nozzle 7
No. 2 is connected to a boiler (not shown), and steam is emitted from the boiler at the time of the permanent fixing process to each steam injection nozzle 72.
Is supplied to the inside of the permanent fixing device main body 71 to heat the inside thereof. Further, in the permanent fixing device 70, a plurality of thinning materials 2 are stacked with a partition plate 73 interposed therebetween in a state 51 in which four surfaces other than the end surface 4 are held by the clamp 50. Each partition plate 73 functions to position each thinning material 2 so as not to move within the device 70. The permanent fixing device 70 is capable of heating a large amount of each thinning material 2 at one time, and therefore has excellent thermal efficiency and is suitable for mass production.

At this time, as conditions for performing the above-mentioned permanent fixing treatment, the temperature of steam is 130 ° C. to 200 ° C., preferably 180 ° C., and the steam pressure is 16 kgf /
cm ² and processing time are set to about 30 minutes, respectively. The permanent fixing process described above can also be performed by heating the inside of the permanent fixing device main body 71 with a heater or the like. That is, the thinning material 2 is permanently fixed by heating the heater by energization and keeping the inside of the permanent fixing device body 71 heated to a predetermined temperature for a predetermined time. At this time, when performing the above-mentioned permanent fixing process, the heater is controlled to keep the internal temperature of the main body 71 of the permanent fixing device at 130 ° C. to 200 ° C., preferably 180 ° C., and the permanent fixing process time is 20
Set to time.

Next, the coating process of the adhesive 3 in the fourth step will be described. For example, about 250 g to 300 g / m ² of resorcinol is applied to the surface of each thinning material 2 whose shape is permanently fixed in the third step. The resin adhesive is applied by a spray device or a brush (not shown).

In addition to the application by the spray device or the like, it is also effective to impregnate each thinning material 2 with an adhesive. Here, a process of impregnating each thinning material 2 with an adhesive will be described. First, the process of impregnating each thinning material 2 with an adhesive is specifically performed as follows. The impregnating device used for the impregnating treatment of the adhesive will be described with reference to FIG. 9. The impregnating device 60 has an impregnating device main body 61 formed of a cylindrical pressure-resistant container, and the adhesive is introduced at the upper part of the impregnating device main body 61. A pipe 62 is attached. Further, a pair of tracks 63 are arranged in the lower inside of the impregnating device main body 61 along the longitudinal direction of the impregnating device main body 61. Furthermore,
A plurality of heating tubes 64 are provided between the tracks 63. Each heating pipe 64 is connected to a boiler (not shown), and when heating is necessary during the impregnation process of the adhesive, steam from the boiler is supplied to each heating pipe 64 to heat the inside of the impregnating device main body 61. is there.

In the impregnating device main body 61, a box-shaped wood cart 65 for accommodating a plurality of thinning materials 2 is arranged. On the lower surface of the wood cart 65, the pair of tracks 6
3, the wheels 66 that are movably mounted are fixedly installed,
As a result, when the opening / closing lid (not shown) of the impregnation device 60 is opened, the wooden cart 65 is moved along the longitudinal direction of the impregnation device main body 61 by each track 63 and the wheels 66 to be taken in and out of the impregnation device main body 61. be able to. Furthermore,
When the adhesive is impregnated, the impregnating device main body 61 has the device main body 6
A vacuum pump P1 is attached to decompress the inside of 1 to eliminate the air existing in the tissue of each thinning material 2, and the inside of the apparatus main body 61 to quickly impregnate the adhesive into the tissue of each thinning material 2 A pressurizing pump P2 for pressurizing is attached.

Next, a method of impregnating the tissue of each wood with the adhesive through the impregnation device 60 will be described. First, the opening / closing lid of the impregnation device 60 is opened to take out the wooden cart 65 from the impregnating apparatus main body 61, and the thinned wood 2 that has been peeled is filled in the wooden cart 65. After moving it into the impregnation device body 61 and loading it, the opening / closing lid is closed. Then, the vacuum pump P1 is operated to reduce the pressure in the impregnating apparatus main body 61 at room temperature under a reduced pressure of about 550 mmHg for about 0.5 to 2.0 hours. As a result, the air existing in the tissue of each thinning material 2 is efficiently removed, and the tissue of each thinning material 2 is easily impregnated with the adhesive. Then, from the adhesive introduction pipe 62, the adhesive resin liquid (viscosity: 1.0 poise (25 ° C.) or less, non-volatile content: 50
%) In the impregnating apparatus main body 61. At this time, if heating is required, each heating pipe 64
Steam is supplied to heat the inside of the impregnating apparatus main body 61. After that, the pressure pump P2 is operated to pressurize the inside of the impregnating apparatus main body 61 to 7 to 10 kg / cm ² , and this state is maintained for about 0.5 to 1.0 hour. As a result, the adhesive present on the surface of each thinning material 2 is quickly impregnated into the tissue of each thinning material 2 by the applied pressure. After impregnating the tissue of each thinning material 2 with the adhesive in this way, the operation of the pressurizing pump P2 is stopped, the inside of the impregnating device main body 61 is returned to normal pressure, and the excess adhesive resin liquid (unimpregnated adhesive) The agent resin liquid) is collected from the impregnating apparatus main body 61. After the impregnation process is completed in this way, the opening / closing lid is opened, and the wooden cart 65 is moved to the impregnation device body 6
Each thinning 2 which is taken out from No. 1 and impregnated with the adhesive is carried out from the wood cart 65. The reason why such an impregnation treatment is desirable is that the air inside each thinning material 2 is eliminated by the pressure reduction treatment to facilitate the impregnation, and the pressure treatment allows the adhesive to be impregnated in a short time. Is.

Further, the fifth step of integrating the thinning materials 2 coated with the adhesive 3 by adhesion curing will be described with reference to FIG.
Description will be made based on 0. Here, FIG. 10 is an explanatory view schematically showing a state in which the thinned material 2 is laminated, that is, a predetermined shape is held and held to cure the adhesive 3.

Next, the clamping device 80 used in the fifth step.
The configuration will be described with reference to FIG. Compressor 80
Is composed of a base 81 on which the thinning materials 2 are stacked in a predetermined shape, and three press-fastening tools 82, 83, 84 arranged on both the left and right sides and the upper side of the base 81. The pressing member 82 is attached to one end of a press rod 86 which is pressed and moved by the press cylinder 85 and is attached to the press member 8.
7, and similarly, the press-fastening device 83 has a press member 90 attached to one end of a press rod 89 that is pressed and moved by a press cylinder 88. In addition, the pressure fastener 8
4 also has a press cylinder 91, a press rod 92, and
It is composed of a press member 93.

When the thinning material 2 is compacted by the compacting device 80 constructed as described above, each thinning material 2 is kept at room temperature (about 25 ° C.). 82, 8
It is clamped by 3, 84 with a clamping pressure of about 10 kgf / cm ² . The pressing time for holding each thinned material 2 in a pressed state, that is, the time required for curing the adhesive 3 applied to the surface of each thinned material 2 depends on the type of adhesive used. It The thinning materials 2 are bound to each other with an adhesive by pressing for about 30 minutes.

In order to press the thinning materials 2 coated with the adhesive 3 by the pressing device 80, first, the thinning materials 2 are placed on the base 40 in a state of being laminated in a predetermined shape. After that, the press cylinders 85, 88, 91 of the respective pressure fasteners 82, 83, 84 are driven to drive the press rods 86, 8 respectively.
9, 92 are moved under pressure. In this way, the thinning material 2 is pressed laterally and downward by the press members 87, 90, 93, and the pressed state is maintained for a predetermined pressing time. While performing such compaction, each thinning material 2
The adhesive applied during the period is hardened, whereby the aggregate material 1 in which the thinning materials 2 are integrated is manufactured. It is also effective to attach a heating means such as a sheet heating element to the clamp 50 to accelerate the curing of the adhesive while the clamp 50 clamps the four surfaces other than the end surface 4 as shown in FIG. .

After the fifth step described above is completed, the aggregate 1 described with reference to FIG. 1 is obtained.

The aggregate material 1 produced in this manner has a unique annual ring pattern N having a large design effect on the end face 4, and therefore the aggregate material 1 is cut in the radial direction of each thinning material 2. When a plate material is formed by using the plate material as a surface material of a product, it can be used for various products in an extremely wide range. In addition, the aggregate material 1 is cut in the lengthwise direction of each thinned material 2 and the grain pattern, grain pattern, or a mixture of these patterns appearing on the side surface has a great design effect and is used in a wide variety of products. Is what you can do.

The aggregate material 1 manufactured as described above is processed as it is or into a plate material or the like by a cutter, a grinder or the like,
The products that can be used include the following products. For example, as building components, pillars, girders, beams, braces, foundations, wall planks, wall corners, skirting boards, ceiling rims,
Large acceptance, joists, floor bundles, stair treads, hidden nose,
It can be used as a purlin. Also, as building materials and building opening members, doors, upper stiles for doors, lower stiles for doors, vertical stiles for doors, upper stiles for glass doors, lower stiles for glass doors, vertical stiles for glass doors, middle stiles for glass doors. , Pushing edge for glass doors, armored doors, siding for armored doors, stiles for bran, upper stiles for screen doors, lower stiles for screen doors, vertical stiles for screen doors, middle stiles for screen doors, press rims for screen doors, door frames, door frames , Door upper frame, Door lower frame, Door vertical frame, Door door frame, Sliding door frame, Sliding door upper frame, Sliding door lower frame, Sliding door vertical frame, Sliding window frame, Sliding window upper Frame, lower frame for sliding window, vertical frame for sliding window, rotating window frame, upper frame for rotating window, lower frame for rotating window, vertical frame for rotating window, sill window frame, upper frame for sill window, Bottom frame for kill windows, vertical frame for kill windows, picture frames for window frames, shutters, shroud boards, upper stiles for shutters, lower stiles for shutters, vertical stiles for shutters Shutters for the upper frame, lower frame for shutters, vertical frame shutters, door pocket, can be used in the door pocket for end plate or the like.

Further, as an interior / exterior material for construction, it can be used for tiles, mosaic tiles, floor boards, ceiling boards, wall boards and the like. Further, it can be used for window railings, window lattices, stairs, stair railings, handrail posts, balconies, balconies, gates, gateposts, gates, fences, fences for assembling houses and the like. In addition, as furniture, beds, chairs, rocking chairs, chaise lounges, benches, sitting chairs, pedestals, chair legs, desks,
Bookstand, table, table, conference table, table legs, counter, TV stand, flowerpot, service wagon,
Drawers, cabinets, corner cabinets, sideboards, cupboards, cabinets, hanging cabinets, grate boxes, daily necessities cabinets, mirror stands,
It can be used for furniture pulls, furniture handles, furniture knobs, furniture shelves, etc.As a small indoor organizing tool, it can be used for clothes hangers, magazine racks, newspaper racks, umbrella stands, slippers, etc. You can

In addition, a handle for an umbrella, a cane, a fan bone, a fan bone,
Personal items such as eyeglass frames, footwear such as sandals and girders, smoking pipes, makeup and barber tools such as combs, buttons for clothing, upholstery items such as vases, basins, frames, tubs, washboards, etc. Washing and cleaning tools, cooking and eating containers such as heavy boxes, rice scoops, scoops, cutting boards, kitchen knife patterns, kitchen spoons and other cooking utensils, eating and drinking utensils, gods, Buddhist altars, beads, sutras, etc. Congratulatory supplies, ceiling light shades, ceiling hanging light shades, ceiling hanging light shades, wall lighting shades, wall hanging shades, lighting fixtures such as desk lamp shades, heating and cooling of braziers, etc. or Air-conditioning ventilation equipment, bathtubs, bathtub lids, shower heads, sanitary equipment items such as slats for bathtubs, play products such as braids, assembled playground equipment, blocks, tennis racket frames, ping-pong bats,
Sports equipment such as badminton racket frame, golf club head, stamping material, slide rule, abacus, drafting board,
Writing tools, office tools such as drafting table, pencil case, writing box, pen plate,
Lower footplate, nameplate, transportation pallets, sleepers, planers,
It can be used for temporary construction supplies such as saw handles, scaffolding construction frames, scaffolding posts, scaffolding handrail posts, scaffolding boards, concrete formwork, and the like.

As described above in detail, in the method for manufacturing the aggregated material 1 according to the present invention, after the thinning material 2 is temporarily fixed, the shape is permanently fixed. As a result, it is possible to prevent the internal structure of the aggregate 1 from being destroyed by the heating performed when fixing the shape, and to improve the mechanical properties, abrasion resistance, dimensional stability, etc. of the aggregate 1. The quality can be significantly improved.

In the aggregate 1 according to the present invention, the compression molding process and the temporary fixing process are performed by the compression molding device 40.
Further, the permanent fixing process can be performed by the permanent fixing device 70. As a result, one device having a complicated mechanism as in the related art can be replaced with two simple devices, and the burden of work and maintenance can be reduced. In addition, existing facilities can be used. Further, the volume and heat efficiency of the device can be improved, and a large amount of aggregate material 1 can be handled. By these, the aggregate material 1 with extremely low cost can be manufactured. The skin of the thinned material 2 is often peeled off with high-pressure water, a disc cutter, or the like, but it is possible to reduce the cost by manufacturing the aggregated material 1 by treating the skin with the skin attached. You can go further.

[0065]

【Example】

(Example) (1) 2 pieces of cedar raw material having a diameter of 4 cm, a length of 20 cm, and a specific gravity of 0.8 (air-dry specific gravity of 0.4) were heated in a water tank 20 in hot water 21 at 98 ° C. for 1 hour. A softening treatment was performed. (2) Two softened woods are filled in a press die 41 of the compression molding device 40 one by one, and the cross section is 1.4 cm.
Compressed to (thickness) × 3.5 cm (width) (compression rate about 60
%), The press die 42 is gradually moved to a cross section of wood of 2.
A compression molding process was carried out by excessive compression to return to a position of compression (compression rate of about 30%) which becomes 5 cm (thickness) × 3.5 cm (width). After that, press the dies 41 and 42 at 150 ° C.
The wood is dried by holding it for 1 hour, held by the clamp 50 together with the press dies 41, 42 sandwiching the wood, and then the press dies 41, 42 held by the clamp 50 are taken out from the compression molding device 40, The wood was left to stand at room temperature for 90 minutes to be cooled, and a temporary fixing treatment was performed to obtain wood whose temperature reached 30 ° C. (3) Use two pieces of wood that have been temporarily fixed to the wood
With the surface fixed (taken out from the compression molding device 40 in (3)), steam was injected into the permanent fixing device 70 and kept at 180 ° C. for 30 minutes to perform the permanent fixing treatment. (4) The surface of two pieces of wood that had been permanently fixed was applied with a brush to apply a resin adhesive of resorcinol resin of about 250 g to 300 g / m ² . (5) The two coated woods are placed in the clamping device 80 in a state of being overlapped with each other, and the clamping pressure is 10 kgf /
Clumping was carried out for 30 minutes with cm ^2, and they were integrated to obtain an aggregate.

(6) The following test was conducted on the aggregate thus obtained. The test results are shown in Table 1. a) Water absorption thickness expansion coefficient According to JIS A 5908 (particle board),
The test piece is immersed in water at 25 ± 1 ° C. for 24 hours, and the thickness after the treatment is measured and calculated. t ₁ is the thickness before water absorption (mm) t ₂ is the thickness after water absorption (mm) b) Adhesive strength (block shear strength) According to the JAS standard (laminated material) block shear test,
The test piece shown in 1 is broken with a load speed of 1000 kgf / min as a standard.

(Comparative Example) (1) A steam heating device for two woods obtained by peeling cedar lumber with a final diameter of 10 cm, an original diameter of 12 cm, a length of 3 m, and a specific gravity of 0.8 (0.4 in an air-dried state). In 10, the wood was softened by injecting water vapor and keeping it at 150 ° C. for 1 hour. (2) After the softening treatment, the wood was taken out from the steam heating device 10, and the resorcinol resin adhesive was applied to the wood surface with a brush at about 250 to 300 g / m ² . (3) Two woods coated with a resorcinol resin adhesive are filled in a press mold in a compression molding device (different from the present invention) and compressed (compressed) to a cross section of 9 cm (thickness) × 15 cm (width). Rate of 30%), and then, while maintaining the shape, steam was injected and the mixture was fixed at 180 ° C. for 60 minutes to obtain an aggregate. (4) The aggregates thus obtained were subjected to the tests (a) and (b) in the above examples. Table 1 shows the test results.
Shown in The obtained aggregate material had an air-dry specific gravity of about 0.6.

[0068]

[Table 1]

Here, the test results obtained from the above-mentioned examples and the test results obtained from the comparative examples will be explained in comparison. Regarding bending strength, the bending strength of the example is 1250.
flexural strength of Comparative Example with respect to in the range of kgf / cm ² is 850kgf / cm ^2, it can be seen that about 1.5 times the flexural strength of the comparative example can be obtained according to the embodiment. In this way, the bending strength of the example is about 1.5 times the bending strength of the comparative example. This is because the aggregate material of the comparative example is subjected to heat treatment with steam in a state in which the water content of each piece of wood is large. Therefore, it is considered that the internal structure of each piece of wood is destroyed and the bending strength of each piece of wood itself is lowered, while the aggregate material of the example reduces the water content of each piece of wood by drying, Since the heat treatment is performed, the internal structure of each piece of wood is prevented from being broken, cracked or punctured, and the bending strength of each piece of wood itself is increased, which greatly contributes to the improvement of the bending strength of the aggregate. Further, in the aggregate material in the comparative example, since the adhesive is applied in a state in which the water content of each wood is high, it is possible that the strength is reduced by dilution with water and outflow, but in the example, the water content of each wood is dried. Since the adhesive strength is low, it is possible to prevent the adhesive from diluting and flowing out, which contributes to improving the bending strength. Therefore, it is considered that the bending strength of the aggregate material is increased as a whole together with the adhesive force of the adhesive agent that binds each wood.

Further, focusing on the hardness, while the hardness of the aggregate according to the comparative example is 2.0 kgf / mm ² ,
The hardness of the aggregated material in the examples is 2.8 kgf / mm ^2.
It can be seen that the hardness is in the range of, and a larger hardness is obtained as compared with the comparative example. Regarding this also, it is considered that in the example, the internal structure of each piece of wood in the aggregate was prevented from being destroyed, and the hardness of each piece of wood was improved, and a high aggregate hardness was obtained as a whole.

The coefficient of expansion of water absorption thickness is 9.0% in the aggregate material of the comparative example, while it is in the range of 5.0% in the example, which is about 55% of the comparative example. It turns out that This is also considered to be based on the fact that in the aggregated material of the example, the water absorption rate inside each piece of wood becomes lower than that of the comparative example by preventing destruction of the internal structure of each piece of wood. From this, it can be seen that the aggregate of the example is superior to the aggregate of the comparative example in dimensional stability and shape stability.

Regarding the adhesive strength, in the examples,
Since the water content of each wood is low due to the drying, it is possible to prevent the adhesive from diluting and flowing out due to moisture. Therefore, the adhesive strength (150 kgf / cm ² ) of the aggregate material in the example is better than that of the aggregate material in the comparative example ( It can be seen that it is slightly larger than 110 kgf / cm ² ).

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various improvements and modifications can be made without departing from the gist of the present invention. For example, in the aggregate material 1 according to the present embodiment, as shown in FIG. 1, a rectangular parallelepiped aggregate material is described as an example.
It is apparent that the aggregate material having various desired shapes can be obtained by variously changing the shapes of the press dies 41 and 42 used for No. 0.

[0074]

INDUSTRIAL APPLICABILITY As described above, the present invention prevents the internal structure of the aggregate from being destroyed by drying in the temporary fixing treatment to improve the quality of the aggregate, and the introduction of the temporary fixing treatment separates the manufacturing apparatus. To improve the efficiency of work and the maintenance of manufacturing equipment to improve mass productivity. Therefore, it is possible to provide a manufacturing method capable of obtaining a high-quality aggregated material at low cost, and its industrial effect is great.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an aggregate.

FIG. 2 is an explanatory diagram schematically showing a state in which a thinning material is softened (heated) by a steam heating device.

FIG. 3 is an explanatory view schematically showing a state of softening (heating) a thinned material by boiling in a water tank filled with hot water.

FIG. 4 is an explanatory view schematically showing a state in which a thinned material is softened (heated) by a high-frequency heating device.

FIG. 5 is an explanatory view schematically showing a state before the compression molding process of the thinned wood is performed by the compression molding device.

FIG. 6 is an explanatory diagram schematically showing a state in which the thinning material is compression-molded and temporarily fixed by a compression-molding device.

FIG. 7 is a diagram illustrating a state in which a thinned material is held by a clamp.

FIG. 8 is an explanatory view schematically showing a state in which a thinning material is permanently fixed while being held in a predetermined shape by a permanent fixing device.

FIG. 9 is an explanatory diagram schematically showing a state in which an adhesive is applied to a thinned material by an impregnation device.

FIG. 10 is an explanatory view schematically showing a state in which thinned wood is integrated while being held in a predetermined shape by a pressing device.

FIG. 11 is a schematic view showing the shape of a test piece.

[Explanation of symbols]

1 Aggregate 2 Thinning Material 3 Adhesive 10 Steam Heating Device 20 Water Tank 21 Hot Water 30 High Frequency Heating Device 33 High Frequency Oscillator 40 High Frequency Oscillator 40 Compression Molding Device 41, 42 Press Mold 45, 46 Sheet Heating Element 47, 48 Evaporation Hole 50 Clamp 55 , 56 Press surface plate 60 Impregnation device 70 Permanent fixing device 71 Pressure resistant container 80 Clamping device A-A 'Position corresponding to a predetermined compression ratio BB' Position corresponding to a compression ratio higher than a predetermined compression ratio N Annual ring pattern

Claims (5)

[Claims] 1. A first step of softening a plurality of pieces of wood, and a second step of temporarily fixing each softened piece of wood by a compression molding process at a predetermined compression rate. The third step of permanently fixing the shape of each fixed wood, the fourth step of applying an adhesive to the surface of each permanently fixed wood, and the curing of the adhesive applied to each wood. A method of manufacturing an aggregate material, which comprises a fifth step of integrating each piece of wood with each other. 2. The compression molding process in the second step, wherein the respective woods are over-compressed based on a compression ratio higher than the predetermined compression ratio and then returned to the predetermined compression ratio. Manufacturing method of aggregate. 3. The method for manufacturing an aggregate material according to claim 1, wherein in the temporary fixing treatment in the second step, cooling is performed after drying each of the wood pieces. 4. The method for manufacturing an aggregate material according to claim 1, wherein the compression molding process and the temporary fixing process in the second step are performed through the same compression molding device. 5. The method for producing each piece of wood according to claim 1, wherein, in the permanent fixing treatment in the third step, each piece of wood is heated under high pressure via steam.