CN215619280U

CN215619280U - Plastic granulator

Info

Publication number: CN215619280U
Application number: CN202121766039.6U
Authority: CN
Inventors: 李学华
Original assignee: Kunshan Xiangzhijia Plastic Products Co ltd
Current assignee: Kunshan Xiangzhijia Plastic Products Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-01-25
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a plastic granulator which comprises a crushing assembly, an extrusion assembly and a cutting assembly connected with the extrusion assembly, wherein the crushing assembly is arranged on the upper side of the extrusion assembly; a plurality of extrusion roller sets are symmetrically distributed in the crushing assembly, and each extrusion roller set comprises a crushing roller and a rotating roller; the extrusion assembly receives the crushed plastic powder in the crushing assembly, and comprises a sleeve, an extrusion roller arranged in the sleeve, extrusion holes arranged at one side of the extrusion roller and a forming pipe connected with each extrusion hole; a cooling disc is nested on the surface of the forming tube, and cooling water is circularly conveyed in the cooling disc; the end of the forming pipe is provided with a cutting assembly, the cutting assembly comprises vertical sliding rails and cutters, the vertical sliding rails are symmetrically arranged, the cutters are arranged on the vertical sliding rails, and the cutters reciprocate on the vertical sliding rails. The plastic granulator integrates the functions of crushing, extruding, cooling and cutting granulation, forms a set of complete and automatic granulating equipment, and improves the efficiency and the cost of granulating plastic raw materials.

Description

Plastic granulator

Technical Field

The utility model relates to the technical field of plastic granulation, in particular to a plastic granulator.

Background

The processing process of the existing plastic production line generally comprises the steps of mixing recycled waste plastic and auxiliary materials by using a high-speed mixer, fusing the mixed materials by using an extruder to extrude strip-shaped plastic, and cutting the extruded strip-shaped plastic into small granules by using a granulator after the extruded strip-shaped plastic is cooled by using a cooling machine to obtain granular plastic finished products so as to facilitate transportation and storage and carry out secondary utilization.

The plastic granulator in the prior art adopts resistance heating or coal-fired heating, and the defects of the resistance heating are as follows: the power consumption is large, and the heating cost is high; the heating wire often can burn out, often needs maintenance and replacement, influences production. Extruded plastics need cool off the design, otherwise can take place to warp under the effect of gravity, and the refrigerated mode adopts water cooling usually, but present water cooling's shortcoming lies in, and normal atmospheric temperature cold water is disposable cooling to the plastic strip of extruding, can't carry out cyclic utilization to normal atmospheric temperature cold water, leads to the water waste resource.

In order to overcome the above-mentioned disadvantages, it is necessary to provide an improvement in the prior art plastic pelletizer.

Disclosure of Invention

The utility model overcomes the defects of the prior art and provides a plastic granulator.

In order to achieve the purpose, the utility model adopts the technical scheme that: a plastic pelletizer, comprising: the device comprises a crushing assembly, an extrusion assembly arranged below the crushing assembly, and a cutting assembly connected with the extrusion assembly;

a feeding opening is formed in the top of the crushing assembly, a plurality of extrusion roller sets are symmetrically distributed below the feeding opening, each extrusion roller set comprises a crushing roller and a rotating roller, and crushing teeth are arranged on the surface of the crushing roller;

the extrusion assembly receives the plastic powder crushed in the crushing assembly, and comprises a sleeve for heating the plastic powder, an extrusion roller arranged in the sleeve, extrusion holes arranged on one side of the extrusion roller, and a forming pipe connected with each extrusion hole; a screw is fixed on the surface of the extrusion hole; heating the powder by a sleeve to form molten plastic, wherein the molten plastic forms strip-shaped plastic in the forming tube;

a cooling disc for cooling the strip-shaped plastic is nested on the surface of the forming pipe, and cooling water is circularly conveyed in the cooling disc; the cutting assembly is arranged at the tail end of the forming pipe and comprises vertical sliding rails and cutters, the vertical sliding rails are symmetrically arranged, the cutters are arranged on the vertical sliding rails, and the cutters reciprocate on the vertical sliding rails and cut strip-shaped plastics extruded from the forming pipe.

In a preferred embodiment of the utility model, the adjacent crushing rollers and the rotating rollers rotate in opposite directions and at the same speed.

In a preferred embodiment of the utility model, the bottom of the crushing assembly is provided with a metal screen.

In a preferred embodiment of the present invention, the sleeve is provided with an interlayer, the interlayer connects the high temperature steam pipeline and the exhaust pipeline, and the high temperature steam pipeline and the exhaust pipeline circularly convey high temperature gas into the interlayer.

In a preferred embodiment of the present invention, a driving motor is provided to each of the crushing roller and one side of the rotating roller, and the driving motor independently drives the corresponding crushing roller or the rotating roller.

In a preferred embodiment of the utility model, one side of the extrusion roller is connected with a driving device, and the driving device comprises an extrusion motor and a speed reducer.

In a preferred embodiment of the present invention, the reducer is provided with a driving gear and a driven gear engaged with each other, the driving gear drives the driven gear to move, the driving gear is smaller than the driven gear, and the driven gear is fixedly connected to the extrusion hole.

In a preferred embodiment of the utility model, the crushing roller is higher than the turning roller.

In a preferred embodiment of the present invention, the thread density of the screw member is increased in the direction from one end of the extrusion roller to the extrusion hole.

In a preferred embodiment of the utility model, the extrusion speed of the extrusion roller is controlled by controlling the rotation speed of the extrusion motor.

The utility model solves the defects in the background technology, and has the following beneficial effects:

(1) the utility model provides a plastic granulator which integrates the functions of crushing, extruding, cooling and cutting granulation, forms a set of complete and automatic granulating equipment, and improves the efficiency and the cost of granulating plastic raw materials.

(2) The plastic powder is heated by the interlayer of the sleeve to form molten plastic, and the plastic powder forms the molten plastic under the action of the extrusion roller; the molten plastic passes through the extrusion holes and forms strip-shaped plastic in the forming tube; when the strip-shaped plastic reaches the tail end of the forming pipe and condensed water is communicated into the cooling disc through the water inlet pipeline, the molten strip-shaped plastic is subjected to heat exchange with the condensed water to form hard strip-shaped plastic.

(3) The water condensed by the water-saving cooling device is changed into water at normal temperature, and the water at normal temperature is communicated to the water condensing tank again through the water outlet pipeline, so that the problem that water resources are wasted due to the fact that the normal temperature cold water cools extruded plastic strips once and cannot be recycled is solved.

(4) According to the utility model, the strip-shaped plastic is cut after being hardened, so that the deformation of plastic particles is effectively avoided, the regularity of the plastic particles is ensured, and the adhesion of molten plastic to the cutter is avoided.

Drawings

The utility model is further explained below with reference to the figures and examples;

FIG. 1 is a schematic perspective view of a plastic pelletizer in accordance with a preferred embodiment of the present invention;

FIG. 2 is a schematic perspective view of a size reduction assembly in accordance with a preferred embodiment of the present invention;

FIG. 3 is a schematic perspective view of an extrusion assembly according to a preferred embodiment of the present invention;

FIG. 4 is a perspective view of a decelerator according to a preferred embodiment of the present invention;

FIG. 5 is a schematic perspective view of a forming tube and cooling plate of a preferred embodiment of the present invention;

in the figure: 1. a size reduction assembly; 11. a feeding port; 12. an extrusion roller set; 121. a crushing roller; 122. a rotating roller; 1211. crushing teeth; 13. a metal screen; 2. an extrusion assembly; 21. a sleeve; 211. a high temperature steam line; 212. an exhaust duct; 22. an extrusion roller; 23. a screw; 24. forming a tube; 25. an extrusion orifice; 3. a cooling pan; 4. a drive device; 41. an extrusion motor; 42. a speed reducer; 421. a driving gear; 422. a driven gear.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the utility model in a schematic manner, and thus show only the constituents relevant to the utility model.

Fig. 1 shows a schematic perspective view of a plastic pelletizer according to the present invention. The plastic granulator comprises: the crushing assembly comprises a crushing assembly 1, an extruding assembly 2 arranged below the crushing assembly 1, and a cutting assembly connected with the extruding assembly 2.

As shown in fig. 2, there is shown a schematic perspective view of the size reduction assembly 1 of the present invention. The top of the crushing assembly 1 is provided with a feeding port 11, and a plurality of extrusion roller sets 12 which are symmetrically distributed are arranged below the feeding port 11. Each of the crushing roller sets 12 includes a crushing roller 121 and a rotating roller 122, and the crushing roller 121 has crushing teeth 1211 on its surface. The crushing roller 121 is higher than the rotating roller 122. One side of each crushing roller 121 and one side of each rotating roller 122 are respectively provided with a driving motor, the driving motors independently drive the corresponding crushing rollers 121 or the rotating rollers 122, the rotating directions of the adjacent crushing rollers 121 and the rotating rollers 122 are opposite, and the rotating speeds are the same. The adjacent rotating rollers 122 are also opposite in rotation direction in the utility model, so that the plastic raw materials are extruded and crushed between the adjacent crushing rollers 121 and the rotating rollers 122 and between the adjacent rotating rollers 122.

According to the utility model, the metal leakage net 13 is arranged at the bottom of the crushing assembly 1, so that the size of the plastic powder falling into the extrusion assembly 2 is smaller than the size of the through hole of the metal leakage net 13, and the plastic extrusion efficiency is improved.

As shown in fig. 3, a schematic perspective view of the extrusion assembly 2 of the present invention is shown. The extrusion assembly 2 receives the plastic powder crushed in the crushing assembly 1, and the extrusion assembly 2 comprises a sleeve 21 for heating the plastic powder, an extrusion roller 22 arranged in the sleeve 21, extrusion holes 25 arranged at one side of the extrusion roller 22, and a forming pipe 24 connected with each extrusion hole 25. The screw 23 is fixed on the surface of the extrusion hole 25, and the thread density of the screw 23 is increased from one end of the extrusion roller 22 to the direction of the extrusion hole 25. In the utility model, the plastic powder falling from the metal screen 13 is fed into the sleeve 21, the plastic powder is heated by the sleeve 21 to form molten plastic, and the plastic powder is formed into the molten plastic under the action of the extrusion roller 22.

According to the utility model, the sleeve 21 is provided with the interlayer, the interlayer is connected with the high-temperature steam pipeline 211 and the exhaust pipeline 212, and the high-temperature steam pipeline 211 and the exhaust pipeline 212 circularly convey high-temperature gas to the interlayer, so that the high-temperature steam is continuously conveyed into the interlayer of the sleeve 21. After the high-temperature steam in the embodiment heats the plastic, the hot steam can return to the heat cycle system again through the exhaust pipe 212, and the residual heat in the hot steam can be recycled, so that the waste of energy is solved.

As shown in fig. 4, a perspective view of the decelerator 42 according to the present invention is shown. The driving device 4 is connected to one side of the extruding roller 22, and the driving device 4 comprises an extruding motor 41 and a speed reducer 42.

Be provided with intermeshing's driving gear 421 and driven gear 422 in the reduction gear 42, driving gear 421 drives driven gear 422 motion, and driving gear 421 is less than driven gear 422, driven gear 422 and extrusion hole 25 fixed connection, realize the speed reduction function. The present invention controls the extrusion rate of the extrusion roller 22 by controlling the rotation speed of the extrusion motor 41.

As shown in fig. 5, a schematic perspective view of the forming tube 24 and the cooling plate 3 of the present invention is shown. The molten plastic forms a strip of plastic in forming tube 24. The surface of the forming pipe 24 is nested with a cooling disc 3 for cooling the strip-shaped plastic, and cooling water is circularly conveyed in the cooling disc 3. The cooling plate 3 is a disc-shaped hollow structure, and a cooling cavity is formed in the hollow structure of the cooling plate 3. The surface of the cooling plate 3 is provided with a water inlet pipe chariot and a water outlet pipeline, one side of the water inlet pipeline is connected with the condensed water tank, and the water outlet pipeline is also communicated with the condensed water tank. When the condensed water is communicated to the cooling disc 3 through the water inlet pipeline, the molten strip-shaped plastic forms hard strip-shaped plastic after being subjected to heat exchange with the condensed water, the condensed water becomes water at normal temperature, and the normal-temperature water is communicated to the condensed water tank again through the water outlet pipeline. The problem of normal atmospheric temperature cold water be once only cooling to the plastic strip that extrudes, can't carry out cyclic utilization to normal atmospheric temperature cold water, lead to wasting the water resource is solved.

The end of the forming tube 24 is provided with a cutting assembly (not shown) which comprises symmetrically arranged vertical slide rails and a cutter arranged on the vertical slide rails, wherein the cutter reciprocates on the vertical slide rails and realizes cutting of strip-shaped plastics extruded from the forming tube 24. According to the utility model, the strip-shaped plastic is cut after being hardened, so that the deformation of plastic particles is effectively avoided, the regularity of the plastic particles is ensured, and the adhesion of molten plastic to the cutter is avoided.

When the plastic material crushing device is used, plastic materials are fed from the feeding port 11 at the top of the crushing assembly 1, and the crushing rollers 121 and the rotating rollers 122 in the extrusion roller group 12 rotate reversely to realize the extrusion and crushing of the plastic materials; the plastic powder falling from the metal leakage net 13 is sent into the sleeve 21, the high-temperature steam pipeline 211 and the exhaust pipeline 212 circularly convey high-temperature gas to the interlayer, the high-temperature steam is continuously sent into the interlayer of the sleeve 21, the plastic powder is heated by the interlayer of the sleeve 21 to form molten plastic, and the plastic powder forms the molten plastic under the action of the extrusion roller 22; the molten plastic passes through the extrusion orifice 25 and forms a strip of plastic in the forming tube 24; when the strip-shaped plastic reaches the tail end of the forming pipe 24 and condensed water is communicated into the cooling disc 3 through the water inlet pipeline, the molten strip-shaped plastic is subjected to heat exchange with the condensed water to form hard strip-shaped plastic; meanwhile, a cutter arranged at the tail end of the forming pipe 24 reciprocates through a vertical guide rail, so that the extruded hard strip-shaped plastic is cut.

In light of the foregoing description of the preferred embodiments of the present invention, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A plastic pelletizer, comprising: the device comprises a crushing assembly, an extrusion assembly arranged below the crushing assembly, and a cutting assembly connected with the extrusion assembly;

the extrusion assembly receives the plastic powder crushed in the crushing assembly, and comprises a sleeve for heating the plastic powder, an extrusion roller arranged in the sleeve, extrusion holes arranged on one side of the extrusion roller, and a forming pipe connected with each extrusion hole; a screw is fixed on the surface of the extrusion hole; heating the powder by a sleeve to form molten plastic, wherein the molten plastic forms strip-shaped plastic in the forming tube; a cooling disc for cooling the strip-shaped plastic is nested on the surface of the forming pipe, and cooling water is circularly conveyed in the cooling disc;

the cutting assembly is arranged at the tail end of the forming pipe and comprises vertical sliding rails and cutters, the vertical sliding rails are symmetrically arranged, the cutters are arranged on the vertical sliding rails, and the cutters reciprocate on the vertical sliding rails and cut strip-shaped plastics extruded from the forming pipe.

2. A plastics material pelletiser as claimed in claim 1, wherein: the adjacent crushing roller and the rotating roller have opposite rotation directions and same rotation speed.

3. A plastics material pelletiser as claimed in claim 1, wherein: and a metal screen is arranged at the bottom of the crushing assembly.

4. A plastics material pelletiser as claimed in claim 1, wherein: the sleeve pipe is provided with an interlayer, the interlayer is connected with a high-temperature steam pipeline and an exhaust pipeline, and the high-temperature steam pipeline and the exhaust pipeline circularly convey high-temperature gas to the interlayer.

5. A plastics material pelletiser as claimed in claim 1, wherein: and one side of each of the crushing rollers and one side of each of the rotating rollers are provided with driving motors, and the driving motors independently drive the corresponding crushing rollers or the corresponding rotating rollers.

6. A plastics material pelletiser as claimed in claim 1, wherein: one side of the extrusion roller is connected with a driving device, and the driving device comprises an extrusion motor and a speed reducer.

7. A plastics granulator according to claim 6, wherein: be provided with intermeshing's driving gear and driven gear in the reduction gear, the driving gear drives driven gear moves, just the driving gear is less than driven gear, driven gear with extrude hole fixed connection.

8. A plastics material pelletiser as claimed in claim 1, wherein: the crushing roller is higher than the rotating roller.

9. A plastics material pelletiser as claimed in claim 1, wherein: the thread density of the spiral piece is increased in sequence from one end of the extrusion roller to the direction of the extrusion hole.

10. A plastics granulator according to claim 6, wherein: and controlling the extrusion speed of the extrusion roller by controlling the rotating speed of the extrusion motor.