JP3447134B2 - Manufacturing method of aggregate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an aggregated material obtained by integrally molding a plurality of thinned wood, etc., and particularly to improve the quality by preventing the internal structure of the aggregated material from being destroyed. The present invention relates to a manufacturing method capable of increasing the efficiency of work by separating the devices and facilitating the work and maintenance of the manufacturing device to improve mass productivity and thereby obtain 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 Examined Patent Publication No. 4-4, a large number of softened small-diameter trees are compression-molded integrally in a state in which an adhesive is applied to expand the adhesive area, and then keep the compressed state until the adhesive is cured. By doing so, an adhesive molding method for adhesively molding a small diameter tree is described. 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.

Further, the applicant of the present application previously filed Japanese Patent Application No. 5-19.
5548, etc., by softening a plurality of thinned timbers, applying an adhesive to the softened thinned timbers to assemble them, heating and pressing them, and then applying 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.

[0005]

However, the method for adhering small-diameter trees described in Japanese Patent Publication No. 4-4 is to secure more stable adhesive strength with respect to the strength of many integrated small-diameter trees. Although effective, in order to stabilize the shape of the obtained large diameter tree, heat treatment is performed in a state where the water content of the small diameter tree is large, without special treatment such as reducing the water content of each small diameter tree. Therefore, the internal structure of the wood is apt to be destroyed, cracked or punctured, which causes a problem of deterioration in quality.

Further, the aggregated material produced by the manufacturing method described in Japanese Patent Application No. 5-195548 can be used in a wide range as a building material due to its excellent properties. However, except for the heat treatment for softening the thinned wood, it is necessary to perform various treatments with the same device having a pressing function for the pressure resistant container. 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 immobilization (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.

[0008]

In order to achieve the above object, the invention according to claim 1 is such that a first step of softening a plurality of woods and each softened wood are bundled in the same fiber direction. Secondly, a temporary fixing process is performed to reduce the water content of each wood while performing a compression molding process with a predetermined compression ratio.
Step, third step of permanently fixing the shape of each temporarily fixed wood, fourth step of applying an adhesive to the surface of each temporarily fixed wood, and adhesion applied to each wood A fifth step of curing the agent to integrate the pieces of wood is adopted.

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 process performed in the third step of the invention according to claim 1, the woods are heated through pressurized steam.

[0010]

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, the softened woods are bundled in the mold in the same fiber direction, and then integrally compression-molded at a predetermined compression rate, that is, a predetermined shape. Further, a temporary fixing process is performed to reduce the water content of each piece of wood that is held integrally with 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. According to such a method of over-compressing, as compared with the case where only predetermined compression is performed,
The water content of each wood can be made smaller, 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. 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 room temperature (usually higher than the water content at the drying temperature). In addition, forcibly cooling each piece of wood to room temperature thereafter is effective for obtaining wood whose shape is temporarily fixed at an early stage. Most of the time required for the temporary fixing process is the cooling time of each dried wood, and since it is long, it is the rate-determining time for the production of the aggregate. Therefore, the forced cooling can significantly reduce the manufacturing time of the aggregate.

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. .

Furthermore, in the third step after the completion of the second step, the temporarily fixed wood is maintained in the shape obtained by the compression molding process and is heated through the pressurized steam to be permanently fixed. Done. This makes it possible to easily obtain each piece of wood whose shape is permanently fixed.

In the subsequent 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 wood to which the adhesive has been applied is pressure-bonded by polymerization while maintaining the shape obtained by the compression molding process. 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 claim 1 has a low water content in each wood due to drying in the same treatment, and pressurized steam in the permanent fixing treatment. The destruction of the internal structure of each wood due to the heating of will not occur. This makes it possible to improve the quality of the aggregate material. In addition, it becomes 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 is a plurality of softened thinned materials (five in the aggregated material 1 of FIG. 1), and the thinning materials 2 are compressed together. After the molding process, the temporary fixing process, and the permanent fixing process, the thinning material 2 is pressure-bonded with the adhesive 3 interposed therebetween. Here, each thinning material 2 is cedar,
The thinned wood removed in the growth process such as cypress is used,
In addition, each thinning material 2 has a main opening 2A of about 15 cm and an end opening 2B.
The thinning material 2 having a relatively uniform diameter of about 10 cm is used.

Specific types of thinning materials 2 used include cedar, cypress, red pine, black pine, larch, hime komatsu, spruce 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.

[0020] 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.

In the present invention, bamboo can be used as well. Bamboo can remain in a state in which the basic structure and the pattern of the capillary bundle are compressed and deformed similarly to the annual rings of wood. As the type of bamboo material, Menso bamboo, bamboo, black bamboo, light bamboo, female bamboo, bamboo bamboo, Hakone bamboo, Imi bamboo, Kan bamboo, etc. are suitable for use, but Menso bamboo, bamboo, black bamboo are applied from the viewpoint of strength and elasticity. A wide range is preferable. Further, it is most preferable to soften the bamboo material in hot water. The reason is that oil can be effectively removed, and as a result, the adhesiveness by the adhesive is improved and the hardness and strength are also increased.

Further, each softened thinning material 2 is deformed more than expected, and it is easy for the thinned material 2 to enter the narrow gaps between them. By changing the predetermined compressibility, various characteristics can be freely changed. 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 thinned woods 2 are bundled in the same fiber direction, and when the thinned woods 2 are arranged so that the front end 2A is on the end face side, the thinned woods 2 are The thinned timbers 2 arranged side by side are arranged so that their end openings 2B are on the end face side of the aggregated material 1. By arranging the thinning materials 2 in this manner, it becomes more difficult for gaps to be formed between the thinning materials 2 in the manufactured aggregate material 1, and the aggregate material 1 having a uniform compression density can be obtained. It is possible to facilitate the work related to the coating process of 3 and save the amount of the adhesive 3 used.

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. After the softened thinned lumber 2 is bundled in the same fiber direction, a compression molding treatment is performed integrally with a predetermined compression ratio. The second step of performing a temporary fixing treatment for reducing the water content of the thinned wood 2, the third step of permanently fixing the shape of each temporarily fixed thinned wood 2, and the surface of each permanently fixed thinned wood 2 It includes a fourth step of applying the adhesive 3 and a fifth step of curing the adhesive 3 of each thinned material 2 that has been applied to integrate the thinned materials 2.

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 apparatus 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 (on the left side in FIG. 2) for injecting the heated steam into the inside, and the heated steam inside is heated by the steam. An exhaust port 13 (upper side in FIG. 2) for discharging the device 10 to the outside is provided. In the steam heating device 10, the inside of the device 10 is communicated with the atmosphere via the exhaust port 13. 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. The heated steam is intermittently injected. Thus, each thinning material 2 is softened uniformly while injecting the heated steam.

Next, a method of heating each thinned material 2 by boiling in hot 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 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 a water tank 20, each thinning material 2
In order to perform the heat treatment of, the water tank 20 is filled with hot water 21 heated to 90 ± 5 ° C., and then the net 22 containing a plurality of thinning materials 2 is put into the water tank 20 via a crane or the like. , Soak in boiling water 21. Then, the water tank 20 with the lid 23
After closing the upper part of the, heat treatment is performed for about 1 to 6 hours. As a result, each thinned material 2 is softened uniformly.

In the above-mentioned heat treatment by boiling, for example, a commercially available latent curing catalyst (for example, an aqueous type catalyst (manufactured by Nitto Kagaku Co., Ltd.), which promotes curing, acts and the adhesive performance at a temperature of 100 ° C. or higher. If a water-soluble adhesive such as an amino resin such as urea or melamine is dissolved in hot water 22 and the application process of the adhesive 3 in the fourth step thereafter can be omitted, Immediately, it becomes possible to perform compression molding processing and temporary fixing processing with a general hot press. After that, it may be permanently fixed in a normal autoclave. This manufacturing method can utilize existing equipment and is economically superior.

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.

Here, the frequency of the high frequency oscillated from the high frequency oscillator 33 is set to 13.56 MHz,
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.

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.
6 is an explanatory view schematically showing a state before the compression molding processing of each thinned material 2 by the compression molding apparatus, and FIG. 6 shows a state where the compression molding processing of each thinned material 2 is performed by the compression molding apparatus and a temporary fixing processing. It is explanatory drawing which shows a state typically.

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, a press die 41 is installed inside. In the press die 41, a plurality of each thinned material 2 to be compressed under pressure are bundled and placed in the same fiber direction. Further, a planar heating element 45 (for example, an electric heater, a heating medium such as steam or oil, or the like) is attached to one outer surface of the press die 41 in order to dry the placed thinning materials 2. . Further, a plurality of evaporation holes 47 are formed in the press die 41 and the sheet heating element 45, and the water vapor generated from the thinning material 2 is generated from each evaporation hole 47.
Moisture passes through.

A press cylinder 44 is installed above the compression molding device 40. Below the press cylinder 44, the press die 42 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 die 42 moves the thinning material 2 from above with the movement of the press rod 43. It is to pressurize. Further, on the upper surface of the press die 42, each thinning material 2 placed in the press die 41 is placed.
A sheet heating element 46 (for example, an electric heater, a heating medium such as steam or oil, or the like) is attached to dry the oil. Further, a plurality of evaporation holes 48 are formed in the press die 42 and the sheet heating element 46, and each evaporation hole 48 is formed.
The water vapor generated from each thinning material 2 passes through. 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, at a compression ratio of 50%, 15
kgf / cm ^2, compression of 30% at 10 kgf / cm ²
Is set to.

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 bundled in the same fiber direction and placed in the press die 41. As described above, when placing the thinning materials 2 in a bundle, keeping in mind the annual ring pattern N appearing on the end surface 4 of the aggregate material 1, the thinning materials 2 having a relatively uniform diameter as described above are provided.
Or thinning materials 2 having different diameters are used. By taking such consideration, the aggregate material 1
It is possible to variously change the annual ring pattern N appearing on the end face 4 of the to produce a unique design effect.

Thereafter, each thinning material 2 is compression-molded at a predetermined compression rate. In this compression molding process, first, the press rod 43 is moved by pressure via the upper press cylinder 44, whereby the press die 42 is pressed.
Compresses each thinned 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 perform a process of overcompressing each thinning material 2 on the basis of a compression rate higher than a predetermined compression rate and then gradually returning 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, the temporary fixing process of 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. Drying is performed by heating the press dies 41 and 42 via the sheet heating elements 45 and 46, respectively. The water vapor and water of each thinning material 2 that evaporates during drying passes to the outside through the evaporation holes 47 and 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, the standard for completion of drying is 30 ° C (room temperature) for the reason described in the cooling condition described later.
It is desirable that the water content of each thinning material 2 be 35% or less, which is the upper limit of the water content capable of temporarily fixing the shape.

Further, forcibly cooling the thinned material 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 thinning material 2 is cooled by the molds 41 and 42. The press dies 41 and 42 are cooled by passing cooling water or air through the pipes and forcibly cooling the dies.

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 (around room temperature). Although the drying temperature depends on the size of each thinning material 2, the drying temperature is around 150 ° C.
At temperatures above 00 ° C., the shape cannot be temporarily fixed at the drying temperature unless the water content falls below 15%. Therefore, even if the water content does not reach 15% or less, the high temperature at the drying temperature is maintained by maintaining the state where the press die 42 is held at the position A-A 'corresponding to the predetermined compression rate until the end of cooling. The recovery of the shape in the area can be prevented, and each thinning material 2 can be temporarily fixed in a predetermined shape, that is, in a state of being integrally compression-molded in the compression molding process. 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 upward via the, and thereby the press die 42 is moved upward. Then, each thinned material 2 in the press die 41 is taken out of the compression molding device 40. Each thinned-out material 2 taken out is temporarily fixed in shape and cooled to 30 ° C. or less in the temporary fixing treatment, and thus 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 dried material, which is the temporarily fixed thinning material 2, can be obtained as a product for another purpose at an early stage.

Next, the third step of permanently fixing each thinning material 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 material 2 is maintained in the shape obtained by the compression molding process, that is, a state in which the shape is held in a predetermined shape, and FIG. 8 is a predetermined shape in the permanent fixing device. Thinned timber 2 held in place
It is explanatory drawing which shows typically the state which performs the permanent fixing process.

The permanent fixing treatment means that the elastic energy accumulated by the deformation during the compression molding process is released 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, a state in which four faces other than the end face 4 are held by the clamp 50 (a state in which the shape in the compression molding process is held) 51
And heated. The clamp 50 is inexpensive, and the holding by the clamp 50 is an easy work, and a plurality of thinning materials 2 in a shape 51 obtained by compression molding are held by the same clamp 50 at a time. can do. Therefore, when handling a large amount of thinned wood 2, it is
It is economically excellent 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
Reference numeral 2 is connected to a boiler (not shown), and pressurized steam heated from the boiler during the permanent fixing process is supplied to each steam injection nozzle 72 to heat the inside of the permanent fixing device main body 71. 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 the conditions for performing the above-mentioned permanent fixing treatment, the temperature of the heated steam is 130 ° C. to 200 ° C., preferably 180 ° C., and the steam pressure is 1
The processing time is set to 6 kgf / cm ² , and the processing time is set to about 30 minutes. 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 the above-mentioned permanent fixing process is performed, the heater controls the internal temperature of the main body 71 of the permanent fixing device to 130 ° C. to 200 ° C., preferably 180 ° C.
The heating is controlled so as to maintain the temperature at 1, and the permanent fixing treatment time is set to 20 hours.

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 wooden 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 wood cart 65 from the impregnation apparatus main body 61, and the thinned wood 2 that has been peeled is filled in the wood cart 65, and the wood cart 65 is moved by the wheels 66 and the tracks 63. 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 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) is applied. 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 depressurization treatment removes the air inside each thinning material 2 to facilitate the impregnation, and pressure treatment enables the impregnation treatment of the adhesive 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.
A description will be given based on 0. Here, FIG. 10 schematically shows a state in which the shape of the thinning material 2 is held by the compression molding process, that is, the predetermined shape is held by pressing to cure the adhesive 3. FIG.

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 each thinned material 2 is placed in the shape of the compression molding process, and three press-fastening tools 82, 83, 84 arranged on both left and right sides and on the upper side of the base 81.
The press-fastener 82 has a press member 87 attached to one end of a press rod 86 that is pressed and moved by the press cylinder 85, and similarly, the press-fastener 83 is pressed and moved by the press cylinder 88. The press member 90 is attached to one end of the press rod 89. Further, the press fitting 84 is also composed of a press cylinder 91, a press rod 92, and 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 compressed 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 each thinning material 2 to which the adhesive 3 is applied by the pressing device 80, first, each thinning material 2 is placed on the base 40 in the shape of the compression molding process. 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.

In the present invention, since the heat treatment by the pressurized steam is performed in the permanent fixing treatment of the third step, the adhesive 3 on the surface of each thinning material 2 is a thermosetting adhesive suitable for the conditions of the permanent fixing treatment. Then, if the adhesive 3 is cured by heating with pressurized steam, the adhesive 3 can be completely and early cured and bound. That is, as shown in FIG. 7, a state in which four surfaces other than the end surface 4 are held by the clamp 50 (a state in which the shape in the compression molding process is held) 51 is set, and heating is performed with pressurized steam. As for the holding by the clamp 50, a plurality of thinning materials 2 held in the shape of the compression molding process in the state 51 can be held by the same clamp 50 in large numbers at one time.
Therefore, it is possible to handle a larger amount of the thinned wood 2, which is very excellent in terms of work and economy and is suitable for mass production. Also, the third
It is also possible to prepare a permanent fixing device 70 different from the one used for the permanent fixing process in the process, and perform it under the conditions determined by the type of adhesive. As a result, the thinned material 2 is pressed and assembled as shown in FIG. At this time, the adhesive 3 remains in the aggregate 1 as the solidified adhesive 3 (see FIG. 1).

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 way has a unique annual ring pattern N having a great 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 is processed into a plate material with a cutter or a grinder,
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.

As the building interior / exterior material, tiles, mosaic tiles, floor boards, ceiling boards, wall boards, etc. can be used. 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 in detail above, in the method for manufacturing the aggregated material 1 according to the present invention, each thinning material 2 is temporarily fixed and then permanently fixed to retain its shape. As a result, it is possible to prevent the internal structure of the aggregate 1 from being destroyed by the heating that is performed when fixing the shape, and the mechanical properties, thermal properties, abrasion resistance, and chemical resistance of the aggregate 1 can be prevented. It is possible to remarkably improve the quality in terms of the corrosion resistance, corrosion resistance, dimensional stability and the like.

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.

[0067]

EXAMPLES (Example) (1) Two cedar raw materials having a diameter of 4 cm, a length of 20 cm, and a specific gravity of 0.8 (total dry specific gravity of 0.4) were heated in a water tank 20 in hot water 21 at 98 ° C. A softening treatment was carried out for 1 hour. (2) Two softening-treated woods are compressed into a compression molding device 40.
It is filled in the press die 41 of and the cross section is 1.4 cm (thickness)
After compressing to a width of 7.0 cm (width) (compression rate of about 60%), gradually press the press die 42 to a cross section of wood of 2.5 cm.
(Thickness) x 7.0 cm (width) compression (compression rate about 30
%) To perform compression molding by excessive compression. After that, the press dies 41 and 42 are kept at 150 ° C. for 1 hour to dry the wood, and the press dies 4 sandwiching the wood.
Hold 1, 42 together with clamp 50, then clamp 5
The press dies 41 and 42 held at 0 are taken out from the compression molding device 40, left at room temperature for 90 minutes to cool the wood, and a temporary fixing process is performed to obtain wood having a temperature of 30 ° C. It was (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 resilicinol resin of about 250 g to 300 g / m ² . (5) The two coated woods are loaded into the pressing device 80 in a state of being taken out from the compression molding device 40 in (3), and the pressing pressure is 10 kgf / cm ² for 30 times.
The material was pressed and integrated for 1 minute 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 raw material having an end 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 to a cross section of 30 × 30 cm (compression rate 50%).
After that, while keeping the shape, 180
Immobilization treatment was performed by maintaining the temperature at 60 ° 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. Further, the obtained aggregate material had a specific gravity of about 0.8.

[0070]

[Table 1]

Here, the test results obtained from the above-mentioned examples and the test results obtained from the comparative examples will be described in comparison. First, regarding the specific gravity of the molded body, the specific gravity (1.
1) is slightly larger than the specific gravity (0.8) of the comparative example.
In the aggregated material in the comparative example, since the heat treatment with pressurized steam is performed in a state where the water content of each wood is large, the internal structure of each wood is destroyed, cracks or punctures occur, and as a result, the specific gravity of each wood decreases. On the other hand, in the aggregate material of the example, since the moisture content of each piece of wood is reduced by drying and the heat treatment is performed with pressurized steam, destruction of the internal structure of each piece of wood, occurrence of cracks and punctures are prevented. As a result, it is considered that the wood structure became finer than that of the comparative example as a result.

Regarding the bending strength, the bending strength of the example is in the range of 2100 kgf / cm ² , whereas the bending strength of the comparative example is 1030 kgf / cm ² , and according to the example, about the same as that of the comparative example. It can be seen that a bending strength of 2.0 times can be obtained. In this way, the bending strength in the example becomes about twice as large as the bending strength in the comparative example because the aggregated material in the comparative example is subjected to the heat treatment with the pressurized steam in a state where the water content of each wood is large. On the other hand, it is considered that the internal structure of each wood is destroyed, and the bending strength of each wood itself is lowered, while in the aggregate material of the example, the moisture content of each wood is reduced by drying with pressurized steam. In order to perform the heat treatment, destruction of the internal structure of each wood, the occurrence of cracks and punctures are prevented, and the bending strength of each wood itself becomes large, which greatly contributes to the improvement of the bending strength of the aggregate material. The bending strength of the aggregate is considered to be based on the fact that the bending strength of the aggregate increases as a whole together with the adhesive force of the adhesive agent that binds each piece of wood.

Further, focusing on the hardness, while the hardness of the aggregate according to the comparative example is 2.7 kgf / mm ² ,
The hardness of the aggregated material in the examples is 4.3 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 11.9% in the aggregate material of the comparative example, while it is in the range of 5.5% in the example, which is about 1 /% of that of the comparative example. It turns out that it is 2. 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, there is almost no difference between the example and the comparative example, and the adhesive strength of the aggregate in the example (150 kgf / cm ² ) is the adhesive strength of the aggregate in the comparative example (110 kgf). It can be seen that it is slightly larger than / 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.

[0077]

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 the shape of the thinned material in the compression molding process 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 Equipment 41, 42 Press Mold 45, 46 Sheet Heating Element 47, 48 Evaporation Hole 50 Clamp 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

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-39814 (JP, A) JPK 4-4 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B27M 1/00-3/00

Claims (5)

(57) [Claims] 1. A first step of softening a plurality of pieces of wood, and a step of compressing the softened pieces of wood in the same fiber direction and then compression-molding the pieces with a predetermined compression ratio to increase the water content of each piece of wood. The second step of performing a temporary fixing process to lower the temperature, the third step of performing a permanent fixing process of the shape of each temporarily fixed wood, and the fourth step of applying an adhesive agent to the surface of each permanently fixed wood. And a fifth step of curing the adhesive applied to each piece of wood to integrate the pieces of wood. 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 manufacturing an aggregate material according to claim 1, wherein in the permanent fixing treatment in the third step, each of the wood pieces is heated through pressurized steam.