JPH09234710A - Preparation of plywood for construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize industrial waste materials and to obtain an inexpensive plywood without using an adhesive as a binder by kneading wood powder prepd. by grinding waste materials of wood with synthetic resin fibers such as cut waste of textile products by heating and performing compression molding of the mixture. SOLUTION: Waste materials such as skins and cut ends of wood stored in a stock warehouse 1 are ground into wood powder by means of a grinder 2. Then, the ground wood powder and a synthetic resin-made fiber which is once melted such as cut waste are kneaded in a kneader 3. The kneaded mixture is molded into a proper size by means of a compression molding machine 4 and by cooling it as it is, the fiber made of the synthetic resin is hardened again and the shape is stabilized. Both the wood powder and the fiber made of the synthetic resin are industrial wastes and costs of the materials are inexpensive and therefore, an inexpensive plywood can be obtd. In addition, as the industrial wastes are effectively utilized, saving of resources is accelerated and it acts a roll for protection of environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a concrete formwork using industrial waste or a plywood for construction such as an interior base material.

[0002]

2. Description of the Related Art Heretofore, various structures of plywood using industrial waste or methods of manufacturing the plywood have been disclosed. In those configurations or the manufacturing method thereof, a thermosetting synthetic resin adhesive or synthetic rubber adhesive is used as a binder agent for adhering materials.

[0003]

In the above conventional method,
Since the adhesive is used as the binder, it has the following three problems. 1. The cost of the adhesive itself is high. 2. It is difficult to evenly mix the adhesive and the waste material, and unevenness occurs, making it impossible to manufacture products of stable quality. 3. A facility for supplying the adhesive is required, and since a toxic gas is generated when the adhesive is heated, a facility for removing the gas is also required. The cost will also be high. That is, even if industrial waste with low material cost is used as the main material, by using the adhesive as the binder, the material cost,
Since the cost of manufacturing equipment is high, the price of the product itself is high, and there is no merit of using industrial waste with low material cost. Moreover, if the price of the product itself rises and it becomes unacceptable in the market, recycling of industrial waste will not proceed and environmental protection that will prevent excessive logging of South Sea timber, which is generally used as a material for plywood, In terms of aspects, it becomes difficult to achieve that purpose.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and an object thereof is to provide a low-cost plywood which utilizes industrial waste and does not use an adhesive as a binder. To do.

As a means for this, synthetic resin fibers such as cutting waste of fiber products are heated and kneaded with wood powder obtained by crushing wood waste, and compression molding is performed.

With the above structure, synthetic resin fibers are used as the binder agent for adhering materials without using adhesives such as synthetic resin adhesives and synthetic rubber adhesives. That is, since these fibers are heated, and once melted, they are kneaded and mixed with wood powder and compression-molded, so that an apparatus for supplying an adhesive or a gas removing apparatus is not required. Both wood powder and synthetic resin fibers such as cutting waste are industrial wastes, and because they are made up of only industrial wastes, the cost of materials becomes low, and the above-mentioned conventional problems are solved. is there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing the flow of production of the present invention. Reference numeral 1 is a stock warehouse for storing waste materials such as wood skins and scraps, and 2 is a crusher for crushing the waste materials into wood powder. 3 is a device for kneading the wood powder crushed by the crusher 2 and synthetic resin fibers such as cutting scraps.
By heating to about 00 ° to 220 °, the synthetic resin fiber is melted and kneaded with the wood powder. The size of the synthetic resin fiber is not particularly limited, but it is desirable to cut the fiber as small as possible. Mixing wood powder and synthetic resin fiber requires that the weight of the wood powder be 1 and the synthetic resin fiber weight is 0.5 or more. By adding a large amount of synthetic resin fiber, the strength of the plywood itself Can be raised. Further, during this process, it is possible to mix industrial waste such as beer scraps and chaff, and by mixing them, it is possible to form a lightweight plywood although the strength is reduced. The kneaded mixture is molded into an appropriate size by the compression molding machine 4 and naturally cooled, whereby the synthetic resin fiber is cured again and the shape is stabilized. Heating the material
It is also possible to perform compression molding, that is, it is also possible to simply knead the wood powder and the synthetic resin fiber without heating during kneading, and form with a heated compressor.

[0008]

As described in detail above, according to the method for manufacturing a plywood for construction of the present invention, an adhesive such as a synthetic resin adhesive or a synthetic rubber adhesive is not used as a binder agent for adhering materials. So, the synthetic resin fiber is used. That is, since these fibers are heated, and once melted, they are kneaded and mixed with wood powder, and compression molding is performed. Therefore, a device for supplying an adhesive or a device for removing gas is not required, and a simple manufacturing is possible. Since it can be manufactured on the line, the manufacturing cost is reduced. Since both wood powder and synthetic resin fibers such as cutting waste are industrial wastes and are composed of only industrial wastes, the cost of materials is low, and therefore inexpensive plywood can be provided. In addition, since the industrial waste is effectively used, it is possible to obtain plywood for construction that is practically useful in that it promotes resource saving and plays a role in environmental protection.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a manufacturing flow of the present invention.

[Explanation of symbols]

 1 stock warehouse 2 crusher 3 kneading machine 4 compression molding machine

Claims (1)

[Claims] 1. A method of manufacturing a plywood for construction, characterized in that wood powder obtained by crushing waste wood material is heated and kneaded with synthetic resin fibers such as cutting waste of a fiber product and compression-molded.