JPH08131805A - Production of fixed grain and device therefor - Google Patents

Abstract

PURPOSE: To provide a method and device capable of producing a fixed grain more efficiently than a method using a ball mill. CONSTITUTION: A crushed powder obtained by crushing a cellulose material and a hard surface grain having a smaller diameter than the crushed powder are placed in a mixing vessel 14. The crushed powder and surface grain are mixed by rotating the mixing vessel 14, an impact force is exerted by an impact means to fix the surface grain on the surface of the crushed powder, and a fixed grain is formed. An impact tool 20 as the impact means is turned in the vessel 14 around its rotating shaft 22 shifted from the axis of rotation of the vessel 14 in the opposite direction to the rotation of the vessel 14 at a higher speed than that of the vessel 14 to form the fixed grain.

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 fixed granules and an apparatus for producing fixed granules. The present invention relates to a method and a manufacturing apparatus for manufacturing fixed particles formed by fixing surface particles.

[0002]

2. Description of the Related Art As a technique related to the present invention, a PC
T JP94 / 00351 (International Publication Number; WO94
/ 20280) "Cellulose-based fine powder particles,
The technology of "wood-like molded product and wood-like product" will be briefly described. The pulverized powder obtained by pulverizing the cellulose material as a raw material is ground to obtain powder particles having an increased bulk specific gravity, and fixed on the outer peripheral surface of the powder particles, surface particles having a smaller diameter and a hardness smaller than the powder particles. Fixed particles are obtained by mixing the resin and the pigment with the fixed particles, melting the fixed particles, and thereafter or simultaneously with melting, forming into a desired shape by extrusion molding or injection molding. Then, it is possible to provide a method for producing a wood-like product and a wood-like product which have a pattern extremely close to the grain of a natural tree on the surface and have a texture such as a touch feeling similar to that of the natural tree.

A more detailed description will be given. The crushed powder obtained by crushing the cellulose material as a raw material does not have a grain shape as it is, and most of them have fibers protruding in a whisker-like shape. The fibers are often entangled with each other to form an aggregated state, and the fibers are not uniformly dispersed in the resin material. Therefore,
By grinding the pulverized powder to obtain powder particles having a high bulk specific gravity, it is necessary to disperse the powder uniformly without causing entanglement.

Further, when such powder particles are directly mixed with the resin in the state as it is and molded, the characteristics of the powder particles and the resin,
The characteristic or function of the molded product is determined only by the function, and the softness of powder particles or poor fluidity may affect workability, resulting in baking during extrusion or fragility of the molded product. there were. Therefore, fixed particles are formed by fixing surface particles (for example, one or more materials selected from an inorganic material, a metal material, or a plastic material) having a smaller diameter and harder than the powder particles on the outer peripheral surface of the powder particles. Then, the fixed particles were mixed with the resin to be molded.
This is because it has been found that the flowability can be improved, the workability can be improved, and the characteristics of the molded product can be changed by selecting the surface grains.

The grinding treatment for increasing the bulk specific gravity is carried out by agitating means for agitating the crushing balls in the vertical and circumferential directions, and the crushing balls are crushed by friction between the crushing balls. The method using was selected.
When processed with a ball mill using crushing balls,
Not only can size be made uniform, whiskers can be eliminated, and surface grains can be fixed at the same time by adding surface grains to the ball mill. Because it was found.

[0006]

However, in the case of the above technique using a ball mill for grinding treatment and fixing of surface grains,
There were the following problems. First, there is the problem of production volume. That is, since the manufacturing container contains balls,
Since the mixed material of pulverized powder and surface particles enters only the gaps between the balls, the number of fixed particles that can be manufactured at one time is small relative to the size of the manufacturing container.

Next, there is a problem of maintenance. First, if you want to inspect, clean, or repair the inside of the production container, you must eject the ball. Therefore,
Equipment (or space) for storing the discharged balls, even temporarily, and equipment (or work) for returning the balls were required. Second, the ball was a consumable item, and the maintenance cost of the device was high.

Next, there is a problem of manufacturing time. That is,
Since the produced fixed particles are present in the gaps between the balls, it takes time and labor to take them out of the production container. Next is the issue of manufacturing control. In other words, we want to check the state during grinding of the mixed material of crushed powder and surface particles, for example, temperature, moisture, etc., to make the quality of the fixed particles produced uniform, but also to stir the balls together. I can't attach the sensor.

Next, there is a problem of equipment associated with manufacturing.
First, since the mixed material of the ground powder and the surface particles and the balls are agitated together, a large amount of kinetic energy is required, which requires a large power source. Secondly, most of its kinetic energy is turned into heat,
In order to prevent the temperature rise due to the heat energy, a water cooling device, which has a higher cooling capacity than the air cooling device and is a large-scale facility, is required.

An object to be solved by the present invention is to provide a manufacturing method and a manufacturing apparatus for fixed particles which can be manufactured more efficiently than a manufacturing method using a ball mill. here,
An object of the inventions of claims 1 and 2 is to provide a method for producing fixed particles, which can be produced more efficiently than a production method using a ball mill. Further, an object of the invention described in claim 3 is to provide an apparatus for producing fixed particles, which can be produced more efficiently than the production method using a ball mill.

A further object of the present invention is to provide an apparatus for producing fixed particles, which can reduce the production time as compared with the production method using a ball mill. Also,
It is another object of the present invention to provide a fixed grain manufacturing apparatus capable of manufacturing control, which cannot be performed by a manufacturing method using a ball mill. Further, an object of the invention of claim 6 is to provide an apparatus for producing fixed particles, which is equipped with a cooling device which is simpler than the production method using a ball mill.

Further, claim 7, claim 8 and claim 9
An object of the described invention is to provide an apparatus for producing fixed particles, which enables more efficient production. Further, an object of the invention as set forth in claim 10 is to provide an apparatus for producing fixed particles capable of producing fixed particles of excellent quality.

[0013]

The present invention is to achieve the above-mentioned object. The method for producing fixed particles according to claim 1, is a mixing container (14) for mixing pulverized powder obtained by pulverizing a cellulosic material and surface particles having a smaller diameter and harder than the pulverized powder. Store in and mix container (14)
By mixing the crushed powder and the surface particles,
It is characterized in that surface particles are fixed on the surface of the pulverized powder by an impacting means for applying an impact force to form fixed particles.

The term "crushed powder" as used herein means not only "crushed particles" obtained by crushing a cellulosic material until it can pass through a mesh of 350 μm square or less at the maximum, and the "crushed particles" are polished. The concept also includes “powder particles” that have been crushed to increase the bulk specific gravity. Also, the impact means
In addition to the means disclosed in claim 2, the concept includes a hammer device that vibrates or reciprocates at high speed.

The method for producing fixed granules according to claim 2 is a technical limitation of the method for producing fixed granules according to claim 1, and the impact means is provided in the mixing container (14). Rotation axis (22) that is offset from the rotation axis of the mixing container (14) inside
It is achieved by an impact tool (20) which forms fixed particles by rotating at a speed higher than that of the mixing container (14) in a direction opposite to the rotating direction of the mixing container (14).

An apparatus for producing fixed particles according to a third aspect of the present invention includes a machine base (11) and a pulverized powder which is rotatable with respect to the machine base (11) and is obtained by pulverizing a cellulose material. A mixing container (14) capable of containing and mixing surface particles having a diameter smaller than that of the pulverized powder and hard, and a rotation axis deviated from the rotation axis of the mixing container (14) inside the mixing container (14) And mix container
In the opposite direction to the rotation direction of (14), equipped with an impact tool (20) which forms fixed particles by fixing the surface particles on the surface of the pulverized powder by rotating at a higher speed than the mixing container (14). It is characterized by

The "crushed powder" referred to here is also a crushed powder obtained by crushing a cellulosic material until it can pass through a mesh of 350 μm square or less at the maximum,
It is assumed that the concept also includes "powder particles" obtained by grinding the pulverized powder to increase the bulk specific gravity. The fixed grain manufacturing apparatus described in claim 4 is a technical limitation of the fixed grain manufacturing apparatus described in claim 3, and the fixed grain formed on the bottom of the mixing container (14). The present invention is characterized in that a drop lid is provided which can drop the particles below the mixing container (14).

The apparatus for producing fixed granules according to claim 5 is a technical limitation of the apparatus for producing fixed granules according to claim 3 or 4, and the inside of the mixing container (14) is Is equipped with an environment sensor for detecting the environment in the mixing container (14). The environment sensor mentioned here is a sensor capable of detecting at least one or more of temperature, humidity, moisture and the like.

The apparatus for producing fixed particles according to claim 6 is a technical limitation of the apparatus for producing fixed particles according to claim 3, 4 or 5, and is a mixing container ( 14) It is characterized by having a ventilation device for replacing the air inside. Here, the "ventilator" means, for example,
Mixing vessel (14) to replace air in the mixing vessel (14)
A combination of an air inlet (16) provided in the air-conditioning device (16) or an air injection device (50) for sending air into the mixing container (14) and a deaeration device (60) for removing air from the mixing container (14). Or a combination of the ventilation port (16) and the deaeration device (60), or a combination of the ventilation port (16) and the air injection device (50).

The apparatus for producing fixed particles described in claim 7 is a technical limitation of the apparatus for producing fixed particles described in claim 3, claim 4, claim 5 or claim 6. The mixing container (14) is provided with a winding device (30) for winding up the crushed powder and surface particles stacked on the bottom of the mixing container (14). The fixed-grain manufacturing apparatus described in claim 8 is a technical limitation of the fixed-grain manufacturing apparatus described in claim 7, and the winding device (30) includes a mixing container (1
The scoop part (35) that holds the crushed powder and surface particles piled up on the bottom of 4), and a rotating device that rotates the crushed powder and surface particles held by the scoop part (35) so as to wind them up (for example, a motor 31 and a rotating device). And a shaft 32).

The apparatus for producing fixed particles according to claim 9 is the apparatus for producing fixed particles according to claim 3, claim 4, claim 5, claim 6, claim 7 or claim 8. This is technically limited, and the rotation axis of the mixing container (14) is characterized by being obliquely displaced from the vertical direction. The apparatus for producing fixed particles according to claim 10 is the apparatus for producing fixed particles according to claim 3, claim 4, claim 5, claim 6, claim 7, claim 8 or claim 9. Is a technical limitation, and powder particles with a bulk specific gravity increased by grinding the crushed particles of the cellulosic material until they can pass through a mesh of 350 μm square or less at the maximum. A grinding device that can be formed is provided, and the grinding device is characterized in that it is provided with a roller device (40) that rotates in contact with the inner wall surface of the mixing container (14).

Here, the "inner wall surface of the mixing container (14)" means
In addition to the bottom surface, when the side surface of the mixing container (14) has a cylindrical shape, it may be the side surface.

[0023]

[Working] The method for producing fixed particles according to claim 1,
It operates as follows. First, the crushed powder obtained by crushing the cellulose material and the crushed powder are stored in a mixing container (14) for mixing the surface particles having a smaller diameter and harder than the crushed powder, and the mixing container (14) is rotated. And the pulverized powder and the surface particles are mixed to form a mixed material.

By applying an impact force to the mixed material by impact means, surface grains are fixed on the surface of the pulverized powder, and fixed grains are formed. The method for producing fixed particles according to claim 2 has the following actions. That is, the impact tool (20) as an impact means includes a rotation direction of the mixing container (14) about the rotation axis (22), and an impact tool (20).
It rotates at a speed higher than that of the mixing container (14) in the direction opposite to the direction of rotation of the pulverized powder and surface particles that rotate around. Then, an impact is applied by the impact tool (20) that rotates in the reverse direction at a high speed, the surface grains are fixed on the surface of the pulverized powder, and the fixed grains are formed.

The apparatus for producing fixed particles according to the third aspect of the invention operates as follows. First, crushed powder obtained by crushing a cellulosic material and surface particles having a smaller diameter and harder than the crushed powder are stored in the mixing container (14). Then, the mixing container (14) is rotated with respect to the machine base (11). On the other hand, the impact tool (20) is reversely rotated at a higher speed than the mixing container (14). Then, an impact is applied by the impact tool (20) that rotates in the reverse direction at high speed, and the surface grains are fixed on the surface of the pulverized powder to form fixed grains.

The fixed grain manufacturing apparatus described in claim 4 has the following action, which is different from the action of the fixed grain manufacturing apparatus described in claim 3. That is, after the fixed particles are formed, the drop lid provided at the bottom of the mixing container (14) is opened and dropped below the mixing container (14), whereby the fixed particles are collected very easily.

The fixed grain manufacturing apparatus described in claim 5 has the following action, which is different from the action of the fixed grain manufacturing apparatus described in claim 3 or 4.
That is, the environment sensor can detect the environment in the mixing container (14) when the crushed powder and the surface particles are mixed and when the impact tool (20) forms the fixed particles. Depending on the environment, by adjusting the rotation speed of the impact tool (20) and the mixing container (14), adjusting the temperature in the mixing container (14),
The environment in the mixing container (14) is adjusted to a better condition.

The fixed grain manufacturing apparatus described in claim 6 has the following action, which is different from the action of the fixed grain manufacturing apparatus described in claim 3, 4 or 5. . That is, since the inside of the mixing container (14) generates heat due to the mixing of pulverized powder and surface particles or the formation of fixed particles, when the heat generation adversely affects the production of fixed particles, the mixing container (14) is ventilated. Replace the air inside to lower the temperature in the mixing container (14). Further, steam and other gases are generated in the formation of fixed particles, but by ventilating the steam and other gases from the mixing container (14), it is possible to prevent the adverse effect on the production of fixed particles due to gas retention. , To prevent condensation.

The fixed grain manufacturing apparatus described in claim 7 is different from the fixed grain manufacturing apparatus described in claim 3, claim 4, claim 5 or claim 6 in the following action. It works. That is, at the time of mixing the crushed powder and the surface particles, or when forming the fixed particles by the impact tool (20),
On the bottom of the mixing container (14), crushed powder and surface particles or fixed particles are piled up. The piled pulverized powder and surface grains or fixed grains are wound up by a winding device (30). Then, the crushed powder and surface particles that have been piled up are rolled up, and the formation of fixed particles by the impact tool (20) is made efficient. If the surface particles and fixed particles are rolled up, the impact particles (20) further fix the surface particles on the surface of the fixed particles,
The quality of fixed grains is improved.

The fixed grain manufacturing apparatus described in claim 8 has the following action, which is different from the action of the fixed grain manufacturing apparatus described in claim 7. That is, the pulverized powder and surface particles piled up on the bottom of the mixing container (14) are
It is held by the scoop part (35) and wound up by the rotating device (31, 32). The fixed grain manufacturing apparatus described in claim 9 is different from the fixed grain manufacturing apparatus described in claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8. As a result, the following actions are performed.

That is, since the rotation axis of the mixing container (14) is slanted from the vertical direction, depending on the conditions such as the kind of pulverized powder or surface particles, the mixture of pulverized powder and surface particles, fixed particles Streamline the formation of. The apparatus for producing fixed particles according to claim 10 is the apparatus for producing fixed particles according to claim 3, claim 4, claim 5, claim 6, claim 7, claim 8 or claim 9. The following action is different from the action described above.

That is, the roller device (40) rolls in contact with the inner wall surface of the mixing container (14). Then, the roller device (40)
Sandwich the crushed granules with the inner wall surface of the mixing container (14) to crush them to increase the density, or crush the fluff on the surface of the crushed granules to increase the bulk specific gravity of the crushed granules and form powder particles. . Fixed particles are formed by fixing surface particles to the powder particles. When the fixed particles are crushed by being sandwiched between the roller device (40) and the bottom surface of the mixing container (14), the surface particles are reliably fixed.

[0033]

Embodiments of the present invention will now be described with reference to the embodiments and the drawings.
This will be described in more detail. The drawings used here are FIGS. 1 and 2. FIG. 1 is a conceptual diagram showing an embodiment of a fixed grain manufacturing apparatus according to the present invention. FIG. 2 is a conceptual diagram showing a second embodiment of the apparatus for producing fixed particles according to the present invention.

First, the first embodiment will be described with reference to FIG. The manufacturing apparatus according to this embodiment is a stirring / mixing apparatus 10, and a machine base 11 serving as a base of the entire apparatus.
And a stirring motor 1 fixed to the machine base 11.
2, a rotating shaft 13 rotated by the agitating motor 12, and a transmission gear 13 by the rotation of the rotating shaft 13.
And a cylindrical mixing container 14 that rotates via A. The mixing container 14 is for accommodating and mixing pulverized powder obtained by pulverizing a cellulose material and surface particles having a smaller diameter and harder than the pulverized powder.

The machine base 11 has a stirring motor 12 fixed so that the axial direction of the rotary shaft 13 is vertical. Also,
Vertical support 15 for rotatably supporting the mixing container 14.
Alternatively, a gear shaft 13C, which is a support shaft of a horizontal support gear 13B that rotatably supports the mixing container 14 so as not to move in the horizontal direction, is also fixed. In this embodiment, a 2-speed motor (0.25 kw / 0.37 kw) is adopted as the stirring motor 12, and its rotation speed is from 1000 rpm to 600 rpm.
The rotation speed of the mixing container 14 which is about 0 rpm and rotates via the transmission gear 13A is 10 rpm to 100 rp.
m.

The "crushed powder" mentioned here is a crushed powder obtained by crushing the cellulose material until it can pass through a mesh of 350 μm square or less at the maximum. In terms of the quality of the molded product produced using the fixed particles produced by this apparatus, pulverized powder pulverized to the extent that it can pass through a mesh of 150 μm square or smaller is preferable. The crushed powder is more preferably “powder granules” that have been subjected to a grinding treatment to increase the bulk specific gravity, but here 1
The "crushed particles" that were crushed to the extent that they could pass through a 50-micrometer square mesh were used.

In the stirring and mixing apparatus 10, an impact tool 20 for forming surface grains on the surface of the crushed powder inside the mixing container 14 to form fixed grains, a crushed powder stacked on the bottom of the mixing container 14, and And a winding device 30 for winding the surface grains or the already formed fixed grains. The impact tool 20 includes an impact motor 21 installed outside the mixing container 14 and the impact motor 2
A rotating shaft 22 that rotates by 1 and a main shaft 23 that rotates inside the mixing container 14 by the rotation of the rotating shaft 22;
The main shaft 23 and a blade-shaped agitator 24 provided so as to form a right angle are provided. The rotating shaft 22 and the main shaft 23 are in the vertical direction, but are in positions deviated from the axial direction of the rotating shaft 13 of the mixing container 14.

The impact motor 21 is used in the mixing container 1
It rotates at a speed higher than that of the mixing container 14 in the direction opposite to the rotation direction of 4. In the present embodiment, the third speed (0.25kw / 0.5kw / 1.0k
The motor of w) was adopted. The shape of the agitator 24 may be a simple round bar shape, but in this embodiment, although detailed illustration is omitted, the agitator 24 has a shape capable of pressing the powder colliding with the agitator 24 against the bottom surface of the mixing container 14. There is. Therefore, the powder that collides with the agitator 24 collides with the bottom surface of the mixing container 14.

Further, the agitator 24 is subjected to a surface hardening treatment with a material resistant to abrasion. For example, carbon, nitride carbide and the like. Although the ceramic balls in the conventional ball mill manufacturing apparatus are consumables, the agitator 24 in this embodiment is not a consumable but a wear-resistant product. The speed of the main shaft 23 due to the rotation of the impact motor 21 is set to about 3000 rpm, but depending on the conditions such as the amount of the mixed material and the stirring time, 1000 r
Fixed particles can be formed even at pm or less, and 6000r
A speed of pm or higher can be obtained, and even in that case, formation of fixed particles is possible.

The hoisting device 30 rotates inside the mixing container 14 by a hoisting motor 31 installed outside the mixing container 14, a rotating shaft 32 rotated by the hoisting motor 31, and rotation of the rotating shaft 32. Main shaft 23, branch shafts 34, 34 that bifurcate at the tip of the main shaft 23, and a scoop portion 35 for holding crushed powder and surface grains stacked on the bottom of the mixing container 14 at one tip of the branch shaft 34. And are formed.

At the tip of the branch shaft 34, which is different from the one where the scoop portion 35 is fixed, the crushed particles obtained by crushing the cellulose material to the extent that a mesh of 350 μm square or less at the maximum can be passed. It is equipped with a grinding device that can perform grinding processing to form powder particles having a high bulk specific gravity. In the present embodiment, the grinding device is the mixing container 14
The roller device 40 rotates in contact with the bottom surface of the roller. When the pulverized powder is “powder granules” that have been subjected to grinding treatment for increasing the bulk specific gravity, the roller device 40 may not be provided. However, even if the pulverized powder is “powder particles” that have been subjected to a grinding process to increase the bulk specific gravity, if the roller device 40 is provided, the quality of fixed particles is improved as described below. be able to.

Since the side surface of the mixing container 14 has a cylindrical shape, the roller device 40 which rotates in contact with the side surface of the mixing container 14 may be used. In addition, the roller device 40
It is also possible to rotate by contacting the inner wall surface of the mixing container 14 without providing a rotational power source. The bottom of the mixing container 14 is provided with a drop lid 14A that allows the formed fixed particles to drop below the mixing container 14. In addition, it is desirable that the inner surface of the bottom of the mixing container 14 be a flat surface without concave portions or convex portions in order to efficiently drop the formed fixed particles.

Although not shown, the mixing container 1
The inside of 4 is equipped with an FK sensor. The FK sensor mentioned here is an environmental sensor that can measure temperature in the range of 0 to 200 degrees Celsius and moisture in the range of 0 to 6%. The rotation speed of the agitator 24 can be controlled based on the measured value. Further, a ventilation device capable of replacing the air in the mixing container 14 is formed so as to be separately provided. Here, the “ventilator” is, for example, in the present embodiment, ventilation ports 16 and 16 provided in the upper part of the mixing container 14 for replacing the air in the mixing container 14, and for feeding air into the mixing container 14. The air injection device 50 and the deaeration device 60 for removing the air in the mixing container 14 are combined.

Although not shown, the ventilation ports 16 and 16 are provided with filters. In addition, the air injection device 5
0 is equipped with a filter 51 for removing foreign matter from the air to be sent. Further, the deaerator 60 includes a suction pump 61 for removing the air in the mixing container 14 and a filter 62 for preventing the powder in the mixing container 14 from going out of the mixing container 14. .

By the way, it is desirable that the air sent from the air feeding device 50 is dry air. Specifically, by providing a drain vent to the compressor used to deliver the air. It is desirable that the compressor be auto-dry and oil-free. Further, it is preferable that the air fed from the air feeding device 50 is blown to a place where the powder to be mixed is easily accumulated, such as the branch shafts 34 of the winding device 30 and the vicinity of the scoop portion 35.

As another ventilation device, the ventilation port 16
A combination of the degassing device 60 and the ventilation port 16 and the air feeding device 50 may be used. Next, the operation of the above-described embodiment will be described. First, the pulverized powder obtained by pulverizing the cellulose material and the surface particles having a smaller diameter and harder than the pulverized powder are stored in a mixing container 14.

A stirring motor 12 fixed to the machine base 11.
However, when the mixing container 14 is rotated at 60 rpm via the rotary shaft 13, the pulverized powder and the surface particles are mixed to form a mixed material. An impact force is applied to the mixed material by an impact means to fix surface grains on the surface of the pulverized powder, and fixed grains are formed. That is, in the impact tool 20 as the impact means, the agitator 24 rotates in the direction opposite to the rotation direction of the mixing container 14 about the rotation shaft 22 and the main shaft 23 rotated by the impact motor 21 rotating at about 3000 rpm. . The mixed material is rotated around the impact tool 20 by the agitator motor 12, but since the agitator 24 is rotating in the opposite direction and at a high speed, the mixed material is struck by the agitator 24 and immediately thereafter. Part of mixing container 14
It can also be struck on the inner wall of the. By these actions, surface particles are fixed on the surface of the pulverized powder, and fixed particles are formed.

During the above operation, the mixing container 14
The FK sensor detects the environment inside and the mixed material, and the ventilation device is operated to replace the air in the mixing container 14. For this reason, the water vapor generated during the mixing and stirring is discharged, and the temperature difference between the inside and the outside of the mixing container 14 does not occur, so that the occurrence of dew condensation is prevented. Further, the rotation speed of the agitator 24 is controlled according to the detection result of the FK sensor to improve the quality of the fixed particles. When the temperature in the mixing container 14 rises, the operation of the ventilation device may be strengthened to lower the temperature in the mixing container 14 to improve the quality of the fixed particles.

When the crushed powder and the surface grains are mixed, the impact tool 2
When the fixed particles are formed by 0, crushed powder and surface particles or fixed particles are piled up on the bottom of the mixing container 14.
The piled pulverized powder and surface grains or fixed grains are wound up by the winding device 30. That is, the scoop portion 35, which rotates via the winding motor 31, the rotation shaft 32, the main shaft 33, and the branch shaft 34, winds up the crushed powder and the surface particles or the fixed particles accumulated on the bottom of the mixing container 14, and the impact tool 20. To improve the formation of fixed particles. When the surface particles and the fixed particles are wound up, the impact tool 20 further fixes the surface particles on the surface of the fixed particles, and the quality of the fixed particles is improved.

The roller device 40 rotating at the same time as the scoop portion 35 comes into contact with the bottom surface of the mixing container 14 and rolls. Then, the crushed particles are sandwiched between the roller device 40 and the bottom surface of the mixing container 14 and crushed to increase the density, and the fluff on the surface of the crushed particles is crushed to increase the bulk specific gravity of the crushed particles, thereby increasing the powder particle size. To form. Fixed particles are formed by fixing surface particles to the powder particles. When the fixed particles are crushed by being sandwiched between the roller device 40 and the bottom surface of the mixing container 14, the surface particles are fixed securely.

The stirring and mixing apparatus 10 is operated to complete the fixed particles in about 20 minutes. After the fixed particles are formed, the drop lid 14A provided at the bottom of the mixing container 14 is opened and dropped below the mixing container 14, so that the fixed particles are collected very easily. All can be recovered in about 30 seconds. Next, the effect of the above-described embodiment will be described.

First, regarding the quality of the fixed particles manufactured by the manufacturing method and the manufacturing apparatus of the above-mentioned embodiment, it was possible to manufacture the fixed particles having substantially the same quality as the fixed particles manufactured by using the ball mill. That is, using a ball mill, when comparing the fixed particles formed by fixing the surface particles on the outer peripheral surface of the pulverized powder and the fixed particles produced by the above-mentioned examples with a microscope, the size of the fixed particles There was almost no difference in the fixed state of the surface grains, such as the absence of fluff. For example, comparing the powder densities, the fixed particles using a ball mill were 0.24 g / cc, and the fixed particles produced by the above-mentioned example were 0.22 g / cc.

Further, the resin and the pigment are mixed and melted with the fixed particles manufactured by the manufacturing method and the manufacturing apparatus of the above-mentioned embodiment, and thereafter or simultaneously with the melting, molded into a desired shape by extrusion molding or injection molding. Even if it has a pattern on the surface that is very close to the grain of natural wood,
Moreover, we were able to provide a wood-like product with a texture that is similar to that of natural wood. For example, comparing the densities of the molded products, the molded product using fixed particles using a ball mill has a density of 0.
It was 96 g / cc, and the molded product using the fixed particles produced by the above-mentioned example was 0.95 g / cc.

In addition to being able to provide the fixed granules having almost no difference in quality from the fixed granules produced by the ball mill, the above-mentioned examples have the following effects. First, by not using the required balls in the ball mill, the maintenance cost for exchanging the consumable balls becomes unnecessary, and the inspection, cleaning, and repair of the inside of the mixing container 14 are simplified.

Further, since the ball which is necessary in the ball mill is not used and the dropping lid 14A is provided at the bottom of the mixing container 14, the manufacturing time can be shortened. That is, it took about 20 minutes in the conventional ball mill, but the falling lid 1 was removed from the mixing container 14 of the present embodiment.
By opening 4A, it could be discharged in about 30 seconds. Further, since the FK sensor can be provided in the mixing container 14 by not using the required balls in the ball mill, the quality of the fixed particles produced can be made uniform.

Further, although a water cooling device was required in the ball mill, in the stirring and mixing device 10 of the above-mentioned embodiment, the temperature did not rise enough to require cooling even if the ventilation device was not operating. With the ventilator working, there was almost no temperature rise. This ventilation device also serves as a cooling device, and has a simpler structure than the water cooling device used in the ball mill.

Next, a second embodiment will be described with reference to FIG. The agitating and mixing apparatus 10 of this embodiment is different from the first embodiment in that the rotating shaft 13 of the mixing container 14 is slanted by 30 degrees from the vertical direction, and that the winding device 30 is not provided. . When the rotating shaft 13 of the mixing container 14 is slanted about 30 degrees from the vertical direction and the rotating shaft 22 of the impact tool 20 is provided at the lower part of the mixing container 14, the mixing container 1 is subjected to an impact on the pulverized powder and surface grains.
Since the crushed powder and the surface grains that are piled up in the lower part of 4 are rolled up, it is not necessary to provide the winding device 30.
However, the production efficiency of the fixed grains was slightly improved by providing the winding device 30.

Since the rotation axis of the mixing container 14 is obliquely displaced from the vertical direction, the mixing of the crushed powder and the surface particles and the formation of the fixed particles can be efficiently performed depending on the conditions such as the kind of the crushed powder and the surface particles. Can be converted. Surface particles having a high specific gravity and pulverized powder having a low specific gravity can be efficiently stirred.

[0059]

According to the first and second aspects of the present invention, it is possible to provide a method for producing fixed particles which can be produced more efficiently than the production method using a ball mill. Further, according to the invention described in claim 3, it is possible to provide an apparatus for producing fixed particles, which can be produced more efficiently than the production method using a ball mill.

Further, according to the invention described in claim 4, it is possible to further provide a fixed grain manufacturing apparatus capable of shortening the manufacturing time as compared with the manufacturing method using the ball mill. Further, according to the invention described in claim 5, it is possible to provide a fixed grain manufacturing apparatus capable of performing manufacturing control which cannot be performed by the manufacturing method using the ball mill. In addition, claim 6
According to the described invention, it is possible to further provide a fixed grain manufacturing apparatus provided with a cooling device which is simpler than the manufacturing method using a ball mill.

Further, claim 7, claim 8 and claim 9
According to the described invention, it is possible to provide an apparatus for producing fixed particles, which enables more efficient production. In addition, claim 10
According to the described invention, it is possible to further provide a fixed-grain manufacturing apparatus capable of manufacturing fixed-grains of excellent quality.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of an apparatus for producing fixed particles according to the present invention.

FIG. 2 is a conceptual diagram showing a second embodiment of the apparatus for producing fixed particles according to the present invention.

[Explanation of symbols]

10 Stirring Mixing Device 11 Machine Stand 12 Stirring Motor 13 Rotating Shaft 13A Transmission Gear 13B Horizontal Support Gear 13C Gear Shaft 14 Mixing Container 14A Drop Lid 15 Vertical Supporting Device 16 Ventilation Port 20 Impact Tool 21 Impact Motor 22 Rotating Shaft 23 Main shaft 24 Agitator 30 Winding device 31 Winding motor 32 Rotating shaft 33 Main shaft 34 Branch shaft 35 Scoop portion 36 Stirring rod 40 Roller device 50 Air charging device 51 Filter 60 Degassing device 61 Suction pump 62 Filter

Claims (10)

[Claims] 1. A crushed powder obtained by crushing a cellulosic material, and a crushed powder, which are stored in a mixing container for mixing surface particles having a smaller diameter and harder than the crushed powder, and crushed by rotating the mixing container. A method for producing fixed particles, which comprises mixing powder and surface particles and fixing the surface particles to the surface of the pulverized powder by an impacting means that gives an impact force to form fixed particles. 2. The impact means is rotated inside the mixing container at a speed higher than that of the mixing container in a direction opposite to the rotation direction of the mixing container about an axis of rotation that is offset from the rotation axis of the mixing container. The method for producing fixed particles according to claim 1, which is achieved by an impact tool that forms fixed particles. 3. A machine base, a crushed powder obtained by crushing a cellulosic material and a surface grain which is smaller in diameter and harder than the crushed powder and which can be rotated with respect to the machine base can be stored and mixed. The surface of the pulverized powder by rotating the mixing container and the inside of the mixing container in a direction opposite to the rotation direction of the mixing container about an axis of rotation that is offset from the rotation axis of the mixing container, at a speed faster than the mixing container An impact tool for forming surface-fixed particles by fixing the surface-particles to the surface, and a fixed-particle manufacturing apparatus. 4. The apparatus for producing fixed particles according to claim 3, wherein a bottom lid of the mixing container is provided with a dropping lid capable of dropping the formed fixed particles below the mixing container. . 5. The apparatus for producing fixed particles according to claim 3, wherein an environment sensor for detecting the environment inside the mixing container is provided inside the mixing container. 6. The apparatus for producing fixed grains according to claim 3, 4, or 5, further comprising a ventilation device for replacing air in the mixing container. 7. A winding device for winding up crushed powder and surface particles piled up on the bottom of a mixing container, as set forth in claim 3, claim 4, claim 5 or claim 6. Fixed grain manufacturing equipment. 8. A hoisting device comprises a scoop part for holding crushed powder and surface particles stacked on the bottom of a mixing container, and a rotating device for rotating the crushed powder and surface particles held by the scoop part so as to wind them up. The fixed grain manufacturing apparatus according to claim 7, wherein the fixed grain manufacturing apparatus is formed. 9. The rotating shaft of the mixing container is obliquely displaced from the vertical direction according to claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8. Fixed grain manufacturing equipment. 10. A grinding device capable of forming powder particles having an increased bulk specific gravity by subjecting the crushed particles obtained by crushing a cellulosic material to such a size that they can pass through a mesh of 350 μm square or less at the maximum. The milling device is provided with a roller device that rotates in contact with the inner wall surface of the mixing container. The fixed grain manufacturing apparatus according to claim 6, claim 7, claim 8 or claim 9.