JPS6223646B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a granulator for synthetic resin materials, and its purpose is to be able to granulate continuously, increase the amount of granules per unit time, The object of the present invention is to provide a granulator that can increase the granulation capacity at a constant horsepower.

Conventionally, when granulating materials such as synthetic resin powder, synthetic resin film, or synthetic resin sheet to a predetermined particle size, the material is charged into the hopper of an extruder, melted, and sent to a die using a screw. Granules are produced by extruding into linear shapes and cutting into predetermined lengths.

However, according to this conventional method, the outlet of the material is limited to a die section provided on one side of the extruder, and the material extruded from this die must be cut into a predetermined length. As a result, the amount of granulation per unit time was small, and the granulation capacity at a constant horsepower was small.

The present invention was invented in view of the above points, and consists of a fixed block having a material supply path in the center, and a rotating block facing the fixed block at a predetermined distance. The material is narrowed down to the outer periphery, and the material supplied between the two blocks is melted by rotation of the rotating block relative to the fixed block, and is granulated and discharged from the outer periphery, thereby reducing the amount of granulation per unit time. This made it possible to increase the amount and increase the granulation capacity at a constant horsepower.

Embodiments of the present invention will be described below based on the drawings.

1 is a bottomed cylindrical processing tank supported by a machine stand 2;
An outlet 1a for taking out the granulated material is provided at the bottom thereof, and a lid 3 having a material supply port 3a in the center is provided at the upper opening via a mounting ring 4.

A fixed block 5 having a material supply path 5a communicating with the material supply port 3a is provided inside the lid body 3.
Further, hoppers 6 are provided on the outside, and the mounting ring 4 is mounted on the outer periphery by screwing. 4 is pressed against the upper end of the processing tank 1 by a plurality of air cylinders 7 supported by the machine stand 2. The lid 3 can be rotated by a predetermined angle around the piston rod 7a of one of the air cylinders 7, and the interior of the processing tank 1 can be easily cleaned by rotating the lid 3. It is becoming more and more like this.

The material supply path 5a is provided in the center of the fixed block 5, and a rubbing surface 5b is provided on the lower surface of the fixed block 5, which slopes downward from the center toward the outside in the radial direction.

Further, reference numeral 8 denotes a rotary shaft which is freely rotatable and penetrates the bottom wall of the processing tank 1, the lower end of which is interlocked with an electric motor 9, and the upper end of which is connected to a rotary block 10.
is installed.

On the upper surface of this rotating block 10, there is a rubbing surface 1 that slopes upward from the center side toward the outside in the radial direction.
0a is provided.

The rotating block 10 faces the fixed block 5 vertically at a predetermined interval, and the rubbing surfaces 5b, 10 of both blocks 5, 10
The distance a is made narrower toward the outer periphery to prevent the material supplied between the blocks 5 and 10 from the material supply path 5a from coming out from the opening 11 between the rubbing surfaces 5b and 10a, while is rotated relative to the fixed block 5 of the rotating block 10 and rubbed between the rubbing surfaces 5b and 10a, and the material is melted by the frictional heat generated by this rubbing action and rolled into a rice cake shape. At the same time, this mochi-like material is transferred to the opening 11 side between the rubbing surfaces 5b and 10a by the centrifugal force of the rotating block 10, and during this transfer process, the mochi-like material is cut off by the rubbing action to form a columnar shape with a small diameter. The columnar material is made so that it can be rolled into a ball, and the end of the columnar material on the side of the opening 11 is torn off by the centrifugal force.

That is, by carrying out the rubbing action between the relatively rotating blocks 5 and 10, in the process of rolling the molten material into a rice cake shape, the scraping action separates the cake-like material and turns it into columns. hand,
The increase in diameter of this columnar material is suppressed by narrowing the interval between the blocks 5, 10, and the columnar material is prevented from increasing in diameter by narrowing the distance between the blocks 5, 10.
crushed by the relative rotation of the block to form a large number of small-diameter columnar materials extending in the radial direction of the block;
The ends of this columnar material are torn off by the centrifugal force to form small particles.

Further, the rubbing surfaces 10a of both blocks 10 are provided with a large number of grooves 1 parallel to straight lines in the radial direction, as shown in FIG.
0b and a large number of grooved lines 10c inclined with respect to the straight line in the radial direction are provided alternately at regular intervals, and these grooved lines 10b, 10c promote the rubbing action between the rubbing surfaces 5b, 10a. Let it happen.

On the other hand, on the rubbing surface 5b of the fixed block 5,
A liquid supply port 13 communicating with a liquid source via an on-off valve 12 is opened, and a predetermined amount of liquid is intermittently supplied from this supply port 13 between the rubbing surfaces 5b and 10a, thereby reducing the amount of liquid between the rubbing surfaces 5b and 10a. The molten material melted by the rubbing action at the rubbing surface 5b, 1
This prevents it from adhering to 0a and also prevents an increase in frictional heat during the rubbing.

The present invention is constructed as described above, and when granulating a material, first the electric motor 9 is started, and the rotating block 10 is rotated together with the rotating shaft 8, and then, for example, plasticizers, pigments, etc. The mixed material mixed with the above is charged into the hopper 6, and
By this charging, the mixed material is supplied between the blocks 5 and 10 from the material supply path 5a, and is melted by the frictional heat generated by this rubbing action while being rubbed between the rubbing surfaces 5b and 10a of the blocks. The material is rolled into a mochi-like shape, and this mochi-like material is cut and rolled into a large number of columns, and in the process of transferring this columnar material to the opening 11, the blocks 5 and 10 are rotated relative to each other. The material is crushed into a columnar shape with a small diameter extending in the radial direction of the blocks 5, 10, and the end of the columnar material on the side of the opening 11 is torn off by the centrifugal force of the rotating block 10 to form small particles. It is emitted from the entire area of 11. Also, in this granulation process,
From the liquid supply port 13 to the rubbing surfaces 5b, 10a
During this period, a predetermined amount of liquid, mainly water, is intermittently supplied, and the liquid discharged from the supply port 13 is
The material between the rubbing surfaces 5b and 10a instantly spreads over the entire surface of the rubbing surfaces 5b and 10a, preventing the melted material from adhering to the rubbing surfaces 5b and 10a, and reducing the friction during the rubbing. This can prevent heat from rising.

Next, the results of tests using the granulator of the present invention will be described. Equipped with 37KW electric motor 9, outer diameter 250
A plasticizer is added to the hopper 6 of a granulator having a fixed block 5 and a rotating block 10 of m/m, and an opening 11 between the blocks 5 and 10 having an interval of 0.5 to 1 m/m. 50 copies,
A mixture of 3 parts of stabilizer and 0.1 part of pigment was added, and the rotating block 10 was rotated at 1500 rpm to obtain granulated material with a particle size of about 1.5 to 5 m/m. Also, according to the granulator of the present invention, a 37KW electric motor 9
A granulator with a 37KW electric motor produced 400-500Kg/h of granulated material, whereas a conventional extruder with the same 37KW electric motor produced 100-150Kg/H of granulated material.
Only Kg/H granules can be obtained, and the efficiency of granulation work can be improved compared to conventional equipment.

In addition, a synthetic resin film mixed with a small amount of foreign matter such as fibers, grass, stones, metal particles, etc. is crushed to a size of about 30 m/m and thrown into the hopper 6, which is then transferred to the rotating block 1.
When granulation was carried out by rotating the 0, foreign matter was separated during granulation, and a granulated product was obtained in which no foreign matter was attached or mixed.

In the above embodiments, the material is granulated by tearing the melted material into a rice cake shape using the centrifugal force of a rotating block. On the outer periphery of block 5,
Fixed blade 1 extending toward the rotating block 10 side
4 are provided at regular intervals in the circumferential direction, and the fixed blades 14 are made to protrude outward from the opening 11, so that the granules torn off by the centrifugal force and released from the opening 11 are cut off by the centrifugal force. The particles may be cut with a fixed blade 14 to obtain a uniform particle size. Further, although the fixed blade 14 is formed separately from the fixed block 5 in the drawing, it may be formed integrally with the fixed block 5.

As described above, the present invention uses a fixed block having a material supply port in the center and a rotating block, and the rotating block is opposed to the fixed block at a predetermined distance, while the distance between the two blocks is The material is made narrower to the outer periphery, and the material supplied between the two blocks is melted by the rotation of the rotating block relative to the fixed block, and is granulated and discharged from the outer periphery, so that the material can be continuously produced. The material can be granulated, and the outlet of the granulated material is formed around the entire circumference of the block, and a rotating block is rotated at high speed relative to the fixed block to instantly melt the material. Since it is granulated and discharged, the amount of granulation per unit time can be increased, and the granulation capacity can be further increased with the same horsepower compared to conventional equipment using an extruder.

Furthermore, even if the material supplied between the two blocks contains foreign matter such as fiber, leather, stone, or metal grains,
Foreign matter is separated during granulation and does not adhere to or mix with the granulated material. Therefore, when reusing synthetic resin products by crushing them, there is no need for special separation treatment of the crushed materials. It can be directly used as a material for the granulator of the present invention.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG.
The figure is a longitudinal cross-sectional view showing another embodiment, and FIG. 4 is a cross-sectional view taken along the line of FIG. 3. 5...Fixed block, 5a...Material supply path, 1
0...Rotating block.

Claims (1)

[Claims] 1. A fixed block with a material supply path in the center,
It consists of a rotating block facing the fixed block at a predetermined distance, and the gap between the two blocks is narrowed to the outer periphery, so that the material supplied between the blocks is prevented from rotating with respect to the fixed block. A granulator characterized in that the granulator is configured to melt the granules, granulate the granules, and discharge the granules from the outer periphery.