JP2003200406A - Method for molding woody molded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woody molded product wherein a new way is developed for effective utilization of industrial waste, the reutilization is possible, sufficient consideration is applied to the environment and nonflammability is jointly provided. <P>SOLUTION: The specific molded product is molded by a first process wherein sawdust 3, adhesives 4 and fireproof liquid 5 are prepared to a pellet 20; a second process of drying the pellet 20; and a third process wherein the dried pellet 20 is filled into a heat compression mold, and the adhesives are melted in the pressing process to execute molding by pressure fixing. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a wooden molded product, and more particularly to a method for molding a wooden molded product which can be used as a molded product from sawdust of industrial waste.

[0002]

2. Description of the Related Art Recently, the problem of global warming has been aroused, and in particular, there has been a strong interest in incineration of garbage. Nevertheless, most of them have relied on incineration.

By the way, in the pencil manufacturing industry, for example, sawdust, which is a large amount of industrial waste generated in the process of manufacturing a pencil, is out-compressed if it is partially compressed and hardened.
It is known that it is used as fuel for doors and baths, and part of it is reused as a breeding floor for insects such as beetles and earthworms, or as floor material for livestock.

[0004]

However, even if such sawdust as industrial waste is reused for the above purposes, the amount used is insignificant, and most of them have been incinerated to promote global warming. . There was also the fundamental problem of wasting available natural resources.

The present invention solves the above-mentioned problems, opens a new path to the effective use of industrial waste, and enables reuse, and is a wooden material that is sufficiently considerate of the environment. The task is to propose a molding method for a molded product.

[0006]

As a means for solving the above-mentioned problems, the invention of claim 1 according to the present invention is characterized by comprising the following steps. (1) A first step in which sawdust, an adhesive, and a refractory liquid are extruded from a die at the tip end while being heated and kneaded by using an extruder, and then cut and pelletized. (2) Second step of drying the pellets (3) The dried pellets are housed in a heat compression mold and pressed, and in the process of pressing, the adhesive is melted and pressure-bonded to give a predetermined Third step of molding the molded product

Further, according to the invention of claim 2, the function of the refractory liquid enables the wood to be reproduced without discoloration or carbonization even at a high temperature at the time of thermocompression bonding, and at the same time, the wood is nonflammable. The method for molding a wooden molded article according to claim 1, characterized by having.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of the present invention will be described below with reference to the drawings.

A method of molding a wooden molded article according to the present invention will be described with reference to FIGS. 1 to 5.

First, as shown in FIG. 1, in the first step, 10 kg of sawdust 3 is charged into a container 2 which constitutes a part of the mixing stirrer 1, and 9 kg of polyvinyl alcohol liquid 4 is thermoset. After adding 1 kg of the water-resistant resin 5, the stirring blades 6 forming a part of the mixing stirrer 1 and the drive source motor 7 attached to the lower part thereof are rotated for 5 minutes to 10 minutes.
Stir for minutes to form mixture 8.

In this case, as the mixing and stirring machine 1 described above, a conventionally known one for powder mixing and stirring may be used, and therefore its detailed description is omitted here. The sawdust 3 is preferably 60 to 100 mesh, but is not limited thereto. Moreover, it is most preferable that it is left as it is naturally left for 3 to 4 years, like pencil sawdust, and then treated with steam to remove tar, but it is not limited to this. But it's okay. In addition, the polyvinyl alcohol liquid 4 has a resin content of 0.63 kg with respect to 8.37 kg of water.
It is preferable to use a melted product, but it is not limited to this ratio and may be adjusted depending on the strength required for the product. It is preferable to use 1 kg of the thermosetting water-resistant resin 5 (Randy CP-300 manufactured by Miyoshi Yushi Co., Ltd.), but the amount may be increased depending on the need for water resistance.

Next, as shown in FIG. 2, the formation 8 mixed in FIG. 1 is put into a hopper 11 which constitutes a part of the extruder 10 and a fixed amount which constitutes a part of the extruder 10. After being supplied into the extrusion cylinder 13 by the supply device 12, the mold 1 at the tip portion is kneaded while being kneaded by the rotation of the motor 14 of the drive source that constitutes a part of the extruder 10.
Move toward 5. On the way, the refractory liquid 17 is supplied by the constant quantity water supply device 16 which constitutes a part of the extruder 10, and this is also heated by the heat source heater 18 which constitutes a part of the extruder 10 and extruded from the mold 15. The kneaded and extruded product is cut by a rotary cutter 19 forming a part of the extruder 10 to form pellets 20.

As the extruder 10 in this case, a conventionally well-known general-purpose resin machine can be used, and therefore its detailed description is omitted here. The refractory liquid 17 (Cemesulos Co., Ltd. made by Kyoei Kogyo Co., Ltd.) is 9 kg of the mixed formation 8 formed in FIG.
However, the amount may be increased depending on the required nonflammability. The heat source heater 18 is preferably set to a temperature of 50 ° C. or lower, and the mold 15 preferably has a hole diameter of 3 mm, but is not limited to this.

Next, in the second step, as shown in FIG. 3, the drum type hot air dryer 21 is formed into a drum 22 having a stirring blade 24 and an exhaust window 23, which constitutes a part of the drum type hot air dryer 21. The pellets 20 formed in 1. are used, the rubber roller 25 forming a part of the drum-type warm air dryer 21 is used for power transmission, and the drum is rotated by moving the motor 26 that is a drive source. A warm air generator 27, which constitutes a part of the warm air dryer 21, blows warm air through the center pipe of the drum to dry it.

In this case, in the drum-type warm air dryer 21, the drum 22 portion having the stirring blades 24 and the exhaust window 23, the rubber roller 25, the drive source motor 26 portion, and the warm air generator 27 portion are separately provided. Since it has been commercialized, it is preferable to assemble it while partially improving it. Drive source motor 2
6 is equipped with an inverter, and the speed of rotation is preferably adjusted so that the pellets 20 lifted by the stirring blades 24 fall from the top, and the temperature of the warm air generated by the warm air generator 27 is 400 ° C. The above is preferable. Moreover, it is preferable that the pellets 20 obtained by drying be immediately hermetically sealed so as not to absorb moisture in the air.

Next, in the third step, as shown in FIG. 4, a heat compression mold 35 heated by a heat source heater 32 constituting a part of the thermocompression molding machine 31 is obtained in the second step. The pellets 20 are filled, the hydraulic machine 33 forming a part of the thermocompression-bonding molding machine is operated, the vertical shaft 34 forming a part of the thermocompression-bonding molding machine 31 is pushed up, and the thermocompression die 36 is used for pressure bonding. After waiting for the adhesive in the pellets 20 to melt, the hydraulic machine 33 is released and the vertical shaft 34 is lowered to obtain a predetermined molded product from the mold.

In this case, as the thermocompression-bonding molding machine 31, a commercially available hydraulic rubber molding machine can be used as it is, so a detailed description thereof will be omitted. The temperature of the heat source heater 32 is 1
The temperature is 50 ° C to 180 ° C, preferably 160 ° C, and the pressure bonding time is preferably about 5 minutes to 10 minutes. Further, the thermal compression mold 35 and the thermal compression mold 36 are formed in a coaster shape, but the invention is not limited to this.

FIG. 5 shows the coaster 41 obtained by the above process, which has the characteristics of biodegradability, water resistance, and noncombustibility.

The following demands are expected because of the characteristics as described above. Many people have recently died in a fire in a mixed-use building. In addition, a fire in a car has lost the life of a child. We believe that it is promising as an interior material that takes advantage of the non-combustible characteristics. Since it is also water resistant, it can be wiped off with dirt and has biodegradability for disposal after use.
It can be said that it is an environmentally friendly product. Above all, the raw material is pencil waste of industrial waste, achieving zero emissions.

Further, the pellet 20 obtained in the second step
Demand is promising. Originally, woodworking products that were originally made by cutting, digging, shaving, etc., can purchase desired pellets 20 and raise the mold to make the desired molded product. In recent years, PVC toys have been shunned, but they are likely to attract attention as a new material to replace them.

[0021]

As described above, according to the first aspect of the present invention, a wooden molded product can be molded by a simple method, and the wooden molded product reuses sawdust, which is an industrial waste. Therefore, it is economical. Since it has biodegradability, sufficient consideration is given to the environment.

According to the second aspect of the present invention, the refractory liquid works to reproduce wood without discoloring or carbonizing sawdust or adhesive due to high temperature, and it is a molded product which is wooden but nonflammable. Can be made.

[Brief description of drawings]

FIG. 1 shows a method for molding a wooden molded article according to the present invention,
Explanatory diagram showing a state in which a mixture 8 of raw material sawdust 3, polyvinyl alcohol liquid 4 and thermosetting water resistant resin 5 is prepared

FIG. 2 is an explanatory view showing a state where the mixture 8 obtained in FIG. 1 is made into pellets 20 while adding the refractory liquid 17.

FIG. 3 is an explanatory view showing a state in which the pellets 20 obtained in FIG. 2 are dried.

FIG. 4 is an explanatory view showing a state in which the pellet 20 obtained in FIG. 3 is molded into a wooden molded product 41 by a thermocompression bonding mold.

FIG. 5 is a perspective view of a coaster of a wooden molded product 41 according to the present invention.

[Explanation of symbols]

3 sawdust 4 Polyvinyl alcohol liquid 5 Thermosetting water resistant resin Randy 8 mixture 17 Refractory liquid semelos 20 pellets 41 Wooden Molded Coaster

Claims (2)

[Claims] 1. A method for molding a wooden molded article, which comprises the following steps. (1) A first step of kneading sawdust, an adhesive, and a refractory liquid with an extruder while heating, extruding from a die at the tip, cutting and pelletizing (2) drying the pellets Second step (3) The dried pellet is housed in a heat compression mold and pressed, and in the pressing process, the adhesive is melted and pressure-bonded to form a predetermined molded product. 2. The function of the refractory liquid allows the sawdust and the adhesive to withstand the high temperatures during thermocompression molding without discoloration or carbonization, and to reproduce the feel of wood, and yet to be non-combustible even though it is wooden. The method for molding a wooden molded article according to claim 1, which is characterized in that.