JPS6223645B2 - - 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 fed into the hopper of an extruder, melted, and sent to a die using a screw. Granulation is performed by extruding into a linear shape and cutting into a predetermined length.

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 made narrower to the outer periphery, and the material supplied between the two blocks is melted and granulated by rotation of the rotary block relative to the fixed block, and an annular shape is formed on the outer periphery on the opposing surfaces of the two blocks. The amount of granulation per unit time can be increased by forming the concave grooves and convex stripes, and by partially cutting out the concave grooves and convex stripes to form intermittent concave grooves and intermittent convex stripes. At the same time, it was possible to 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 common.

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.

At the upper end 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 pillar-shaped material is made so that the end 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 surface 10a of the rotating block 10 has
As shown in FIG. 2, a large number of grooved lines 10b parallel to the straight line in the radial direction and a large number of grooved lines 10c inclined to the straight line in the radial direction are provided alternately at one interval, and these grooved lines 10b, 10c promotes the rubbing action between the rubbing surfaces 5b and 10a.

On the other hand, on the opposing surfaces of the blocks 5, 10 and on their outer peripheries, annular protrusions 12, 13 are provided which protrude toward the rotary block 10 from extended surfaces extending outward from the rubbing surfaces 5b, 10a. are formed at regular intervals in the radial direction of the fixing block 5, and an annular groove 17 is formed between the protrusions 12 and 13, and an annular protrusion protrudes from the extended surface toward the fixing block 5. 14, 15, 16 are formed at regular intervals in the radial direction of the rotating block 10, and annular grooves 18, 19 are formed between these protrusions 14-16, while the protrusions 12, 13, and 14- 1
6 are partially removed at regular intervals in the circumferential direction to form intermittent protrusions and grooves, and the intermittent protrusions are displaced in the axial direction of the blocks 5 and 10 to engage them, thereby forming the rubbing surface. The material discharged from the opening 11 between 5b and 10a is made to pass through the intermittent protrusions, and after passing, it is cut between the intermittent protrusions to obtain granules with a uniform particle size. The goal is to make it possible for people to do so. Note that the protrusions 12, 13 and 14
16 and grooves 17, 18 and 19 are formed by attaching annular bodies formed separately from the blocks 5 and 10 to the outer peripheries of the blocks 5 and 10.
Alternatively, it may be formed integrally with the blocks 5 and 10.

Further, the number of the protrusions and grooves may be one each, or may be a plurality as shown in the drawings. In the case where there is only one groove, the groove may be formed into an interrupted groove by partially cutting out both sides or one side of the groove at regular intervals in the circumferential direction.

On the other hand, on the rubbing surface 5b of the fixed block 5,
By opening a liquid supply port 21 that communicates with a liquid source via an on-off valve 20, and intermittently supplying a predetermined amount of liquid from this supply port 21 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 material is granulated, the electric motor 9 is first started, and the rotating block 10 is rotated together with the rotating shaft 8. For example, a plasticizer or a stabilizer is added to the synthetic resin material. , pigments, and the like is charged into the hopper 6. By this charging, the mixed material is supplied from the material supply path 5a between the blocks 5 and 10, and the rubbed surfaces 5b and 10 of the blocks. While being rubbed between 10a, the frictional heat generated by this rubbing action causes the material to melt and roll into a rice cake shape, and this rice cake-like material is cut off and rolled into many pillars, and the pillared material is In the process of moving to the opening 11, it is broken by the relative rotation of the blocks 5, 10 into a columnar shape with a small diameter extending in the radial direction of the blocks 5, 10, and the opening 11 of this columnar material is crushed.
The side edges are torn off by the centrifugal force of the rotating block 10 into small particles, which are discharged from the entire area of the opening 11. Next, the discharged granular material is cut between the intermittent protrusions 12 to 16 and the intermittent grooves 17 to 19 to have a uniform particle size. In addition, during this granulation process, the rubbing surface 5 is removed from the liquid supply port 21.
A predetermined amount of liquid, mainly water, is intermittently supplied between the rubbing surfaces 5b and 10a. It is possible to prevent the molten material from adhering to the rubbing surfaces 5b and 10a, and also to prevent an increase in frictional heat during the rubbing.

Next, the results of tests using the granulator of the present invention will be described.

The hopper 6 of the granulator is equipped with a 37KW electric motor 9, has a fixed block 5 and a rotating block 10 with an outer diameter of 250 m/m, and has an opening 11 between these blocks 5 and 10 with an interval of 0.5 to 1 m/m. ,
50 parts of plasticizer, 3 parts of stabilizer for 100 parts of synthetic resin material
When the rotating block 10 was rotated at 1500 rpm, granules having a particle size of about 1.5 to 5 m/m were obtained.
Furthermore, according to the granulator of the present invention, a granulate of 400 to 500 kg/h was obtained using a granulator equipped with a 37 KW electric motor 9, whereas the same amount was obtained using a conventional device using an extruder.
Equipped with a 37KW electric motor, only 100 to 150Kg/H of granulated material can be obtained, making it possible to improve the efficiency of granulation work 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 is fed into the hopper 6, which is then moved 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.

As described above, the present invention uses a fixed block and a rotating block, and instantaneously melts and granulates the material supplied between the two blocks by rotating the rotating block relative to the fixed block, and melts and granulates the material in an instant over the entire circumference of the block. Since the product is released from the machine, it is possible to granulate continuously and increase the amount of granulation per unit time, making it possible to further increase the granulation capacity with the same horsepower compared to conventional machines that use an extruder. It is. Furthermore, intermittent grooves and intermittent protrusions are provided on the outer periphery of the opposing faces of both blocks to finely cut the granules discharged from the entire periphery of the block, resulting in a uniform particle size. granules can be obtained.

Furthermore, even if foreign substances such as fibers, grass, leather, leather, stones, or metal particles are mixed in the material supplied between the two blocks, the foreign substances will be separated during granulation and will not adhere to or be mixed into the granulated material. Therefore, when a synthetic resin product is pulverized and reused, the pulverized product can be directly used as a material for the granulator of the present invention without any special separation treatment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is an enlarged sectional view taken along the line shown in FIG. 1. 5...Fixed block, 5a...Material supply path, 1
0... Rotating block, 12-16... Convex strip, 17
~19...concave groove.

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. The blocks are melted and granulated, and annular grooves and protrusions are formed on the outer periphery of the opposing faces of both blocks, and the grooves and protrusions are partially cut out. A granulator characterized in that the granulator is designed to form intermittent concave grooves and intermittent convex stripes.