Pelletizing device for thermoplastic elastomer

Abstract

The utility model discloses a granulating device for thermoplastic elastomers. The granulating device comprises a machine table, a granulating machine main body, an extrusion head, an extrusion hole and a multifunctional auxiliary device, according to the utility model, the multifunctional auxiliary device is arranged at the front part of the extrusion head, a bolt for connecting the cutter cover and the extrusion head is detached, and then the cutter cover is detached, so that the driven shaft is separated from the first sleeve hole to relieve the limitation on the cutter, and the cutter can be detached from the outside of the driving shaft to be replaced, and the operation is simple and convenient; the connecting port is connected with an air pipe of an external air compressor to supply air to the air nozzle, and the air nozzle blows air into the cutter cover, so that continuous air flow is formed in the cutter cover to carry out air cooling on materials just extruded in the extrusion hole, the materials are accelerated to be cooled and formed, and it is ensured that the particles are not prone to adhesion.

Description

Technical Field

[0001] The utility model relates to the relevant field of granulators, in particular to a granulator for thermoplastic elasticity. Background Art

[0002] Thermoplastic elastomers, also known as artificial rubber or synthetic rubber, have the excellent properties of high elasticity, aging resistance and oil resistance of traditional cross-linked vulcanized rubber. At the same time, they have the characteristics of convenient processing and wide processing methods of ordinary plastics. They are world-standard environmentally friendly materials. Thermoplastic elastomers need to be made into granules by a granulator during the production process.

[0003] Existing patent application number: CN202120646050.2 A granulation equipment for processing thermoplastic elastomer TPV particles, including a granulator main body and a cutting blade, a semicircular cleaning plate is fixed on the column, and a hard scraping layer, a first water-absorbing sponge layer and a hard water-absorbing layer are fixed on the inner walls on the left and right sides of the semicircular cleaning plate. The hard scraping layer, the first water-absorbing sponge layer and the hard water-absorbing layer are all fan-shaped, and the arrangement direction of the hard scraping layer, the first water-absorbing sponge layer and the hard water-absorbing layer is the same as the rotation direction of the cutting blade. The molten material adhered to the outer surface of the cutting blade during the cutting process can be cleaned three times to ensure the cleaning effect, and the cutting blade can be effectively cooled during the cleaning process to ensure that the cutting blade can work continuously for a long time without stopping, thereby improving the granulation efficiency, and will not cause waste of coolant, thereby reducing the cost of use.

[0004] The above patent records a granulator for thermoplastic elastomers. A cutting blade is provided at the extrusion head of the granulator, and the extruded strips are sheared into granules by rotating the blade. However, in actual use, the temperature of the material is high when it is just extruded. If it is not cooled in time, the particles are prone to adhesion, thus affecting the production quality. In addition, the cutting blade of the granulator is a wearing part, and its replacement operation is inconvenient. The functional structure of the granulator needs to be improved based on the above problems. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a granulating device for thermoplastic elastic material.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a granulating device for thermoplastic elasticity, comprising a machine platform, a granulator main body, an extrusion head, an extrusion hole and a multifunctional auxiliary device, the granulator main body is installed on the top of the machine platform, the front end flange of the granulator main body is installed with an extrusion head, the middle area of ​​the front wall surface is provided with an extrusion hole, the front part of the extrusion head is provided with a multifunctional auxiliary device, the multifunctional auxiliary device comprises a knife cover, a driven shaft, a cutter, a No. 1 sleeve hole, a No. 2 sleeve hole and a drive shaft, the knife cover bolt is installed at the front part of the extrusion head, and the knife cover covers the extrusion hole, the driven shaft is rotatably installed on the front side wall inside the knife cover, the front end part of the shaft body of the cutter is provided with a No. 1 sleeve hole, the cutter is sleeved and installed on the surface of the driven shaft through the No. 1 sleeve hole, the rear end part of the shaft body of the cutter is provided with a No. 2 sleeve hole, the drive shaft is rotatably installed at the center of the front part of the extrusion head, the drive shaft and the internal screw of the granulator main body are coaxially rotated, and the cutter is sleeved and installed on the surface of the drive shaft through the No. 2 sleeve hole.

[0007] Preferably, the length dimension of the No. 1 sleeve hole is consistent with that of the driven shaft, and the length dimension of the No. 2 sleeve hole is consistent with that of the driving shaft.

[0008] Preferably, when the No. 1 sleeve hole is sleeved and connected with the driven shaft, the knife cover completely covers the cutter.

[0009] Preferably, the knife cover is made entirely of transparent material.

[0010] Preferably, the top of the knife cover is connected with an air nozzle, the air outlet at the bottom of the air nozzle is connected to the knife cover, and the top of the air nozzle is provided with a connecting port.

[0011] Preferably, three air ducts are arranged inside the air nozzle, and the three air ducts are respectively a straight air duct in the middle and lateral air ducts on both sides.

[0012] Beneficial effects of the utility model:

[0013] The utility model arranges a multifunctional auxiliary device at the front part of the extruder head. By removing the bolts connecting the knife cover and the extruder head and then removing the knife cover, the driven shaft is separated from the No. 1 sleeve hole to release the limit on the cutter, and the cutter can be removed from the outside of the driving shaft for replacement, and the operation is simple and convenient.

[0014] The utility model provides an air nozzle on the top of the knife cover, connects the connecting port with the air duct of the external air compressor to supply air to the air nozzle, and the air nozzle blows air into the knife cover, thereby forming a continuous airflow in the knife cover to cool the material just extruded in the extrusion hole, accelerate the cooling and forming, and ensure that the particles are not prone to adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a front view structural schematic diagram of the extrusion head in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the knife cover in the utility model;

[0018] Figure 4 It is a rear view structural schematic diagram of the knife cover in the utility model;

[0019] Figure 5 This utility model Figure 4 Schematic diagram of the structure after the middle cutter is removed;

[0020] Figure 6 It is a front view structural schematic diagram of the cutter in the utility model;

[0021] Figure 7 It is a front view cross-sectional structural schematic diagram of the stroke nozzle of the utility model.

[0022] Among them: machine-1, granulator body-2, extrusion head-3, extrusion hole-4, multifunctional auxiliary device-5, knife cover-51, driven shaft-52, cutter-53, No. 1 sleeve hole-54, No. 2 sleeve hole-55, driving shaft-56, air nozzle-57, connecting port-58. DETAILED DESCRIPTION

[0023] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0024] See also Figure 1 The utility model provides a granulating device for thermoplastic elastic material, comprising a machine platform 1, a granulator body 2, an extrusion head 3, an extrusion hole 4 and a multifunctional auxiliary device 5. The granulator body 2 is installed on the top of the machine platform 1, the extrusion head 3 is installed on the front flange of the granulator body 2, the extrusion hole 4 is arranged in the middle area of ​​the front wall, and the multifunctional auxiliary device 5 is arranged in front of the extrusion head 3.

[0025] See also Figure 2-6The multifunctional auxiliary device 5 in the utility model comprises a knife cover 51, a driven shaft 52, a cutter 53, a first sleeve hole 54, a second sleeve hole 55 and a driving shaft 56. The knife cover 51 is bolted to the front of the extrusion head 3, and the knife cover 51 covers the extrusion hole 4 inside. The driven shaft 52 is rotatably mounted on the front side wall inside the knife cover 51. The front end of the shaft body of the cutter 53 is provided with a first sleeve hole 54. The cutter 53 is sleeved and mounted on the surface of the driven shaft 52 through the first sleeve hole 54. The rear end of the shaft body of the cutter 53 is provided with a second sleeve hole 55. The first sleeve hole 54 and the second sleeve hole 55 are not intercommunication. A driving shaft 56 is rotatably mounted at the center of the front of the extrusion head 3. The driving shaft 56 rotates coaxially with the internal screw of the granulator body 2. The cutter 53 is sleeved and mounted on the surface of the driving shaft 56 through the second sleeve hole 55, so that the cutter 53 is sleeved and fixed between the driven shaft 52 and the driving shaft 56 for installation.

[0026] To further explain, the first sleeve hole 54 is consistent with the length of the driven shaft 52, and the second sleeve hole 55 is consistent with the length of the driving shaft 56, so as to ensure that the cutter 53 will not move forward and backward after being sleeved.

[0027] To further explain, when the No. 1 sleeve hole 54 is sleeved and connected with the driven shaft 52, the knife cover 51 completely covers the cutter 53 to prevent the cutter 53 from being exposed and causing safety hazards.

[0028] To further explain, the knife cover 51 is made of a transparent material as a whole, so that the pelletizing condition of the material can be observed through the knife cover 51 .

[0029] See also Figure 7 In the utility model, a tuyere 57 is connected to the top of the knife cover 51, and the tuyere at the bottom of the tuyere 57 is connected to the knife cover 51. A connecting port 58 is provided at the top of the tuyere 57, and the connecting port 58 is connected to the air duct of an external air compressor to supply air to the tuyere 57. The tuyere 57 then blows air into the knife cover 51, thereby forming a continuous airflow in the knife cover 51 to cool the material just extruded from the extrusion hole 4, accelerate its cooling and forming, and ensure that the particles are not prone to adhesion.

[0030] To further explain, three air ducts are arranged inside the air nozzle 57 , which are a straight air duct in the middle and lateral air ducts on both sides, so as to expand the air cooling range of the air nozzle 57 and ensure that the airflow can cover all the extrusion holes 4 .

[0031] Here’s how it works:

[0032] First, the machine platform 1 is placed on a flat ground to provide a stable support for the granulator body 2, and then the granulator body 2 is powered on to meet its power supply requirements.

[0033] Second, when in use, the granulator body 2 pushes the material into the extrusion head 3 through the internal screw, so that the material is extruded outward into strips through the extrusion hole 4. During this process, the drive shaft 56 will drive the cutter 53 to rotate to continuously shear the strip material at the extrusion hole 4 into granules, thereby realizing the granulation processing of the thermoplastic elastomer. By arranging a knife cover 51 at the front part of the extrusion head 3, the knife cover 51 can cover the cutter 53 inside to avoid the cutter 53 being exposed and causing safety hazards.

[0034] Third, during use, the connection port 58 can be connected to the air duct of an external air compressor to supply air to the air nozzle 57, and the air nozzle 57 blows air into the knife cover 51, thereby forming a continuous airflow in the knife cover 51 to cool the material just extruded from the extrusion hole 4, accelerate its cooling and molding, and ensure that the particles are not prone to adhesion.

[0035] Fourth, since the cutter 53 is a wearing part, when it needs to be replaced, first remove the bolts connecting the knife cover 51 and the extruder head 3, then remove the knife cover 51, so that the driven shaft 52 is separated from the No. 1 sleeve hole 54 to release the limit on the cutter 53, and then the cutter 53 can be removed from the outside of the drive shaft 56 for replacement. When installing the cutter 53, directly sleeve the cutter 53 on the outside of the drive shaft 56 through the No. 2 sleeve hole 55, and then place the knife cover 51 back to the front of the extruder head 3, so that the driven shaft 52 on the inside of the knife cover 51 is inserted into the No. 1 sleeve hole 54, and finally fix the knife cover 51 and the extruder head 3 with bolts, so that the cutter 53 is sleeved between the driven shaft 52 and the drive shaft 56 to complete the installation, and the operation is simple and convenient.

[0036] The utility model provides a granulating device for thermoplastic elasticity. A multifunctional auxiliary device 5 is arranged at the front part of an extruder head 3. The bolts connecting a knife cover 51 and the extruder head 3 are removed, and then the knife cover 51 is disassembled, so that a driven shaft 52 is separated from a No. 1 sleeve hole 54 to release the limit of a cutter 53, and the cutter 53 can be disassembled from the outside of a driving shaft 56 for replacement. The operation is simple and convenient. A wind nozzle 57 is arranged on the top of the knife cover 51, and a connecting port 58 is connected to an air duct of an external air compressor to supply air to the wind nozzle 57. The wind nozzle 57 blows air into the knife cover 51, thereby forming a continuous airflow in the knife cover 51, so as to cool the material just extruded in the extrusion hole 4, accelerate the cooling and molding, and ensure that the particles are not easy to be adhered to each other.

[0037] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A granulating device for thermoplastic elastomer, comprising a machine platform (1), a granulating machine body (2), an extrusion head (3) and an extrusion hole (4), wherein the granulating machine body (2) is mounted on the top of the machine platform (1), the extrusion head (3) is mounted on the front flange of the granulating machine body (2), and the extrusion hole (4) is arranged in the middle area of ​​the front wall surface; Features: The extruder (3) further comprises a multifunctional auxiliary device (5), the front part of which is provided with the multifunctional auxiliary device (5), the multifunctional auxiliary device (5) comprising a knife cover (51), a driven shaft (52), a cutter (53), a first sleeve hole (54), a second sleeve hole (55) and a drive shaft (56), the knife cover (51) being bolt-mounted on the front part of the extruder (3), and the knife cover (51) covering the extrusion hole (4) inside, and the driven shaft (52) being rotatably mounted on the front side wall inside the knife cover (51) The front end of the shaft body of the cutter (53) is provided with a first sleeve hole (54), and the cutter (53) is sleeved and mounted on the surface of the driven shaft (52) through the first sleeve hole (54). The rear end of the shaft body of the cutter (53) is provided with a second sleeve hole (55). A drive shaft (56) is rotatably mounted at the front center of the extruder head (3). The drive shaft (56) rotates coaxially with the internal screw of the granulator body (2), and the cutter (53) is sleeved and mounted on the surface of the drive shaft (56) through the second sleeve hole (55).

2. A granulating device for thermoplastic elastomer according to claim 1, characterized in that: The first sleeve hole (54) is consistent with the length of the driven shaft (52), and the second sleeve hole (55) is consistent with the length of the driving shaft (56).

3. A granulating device for thermoplastic elastomer according to claim 1, characterized in that: When the first sleeve hole (54) is sleeved and connected with the driven shaft (52), the knife cover (51) completely covers the cutting knife (53).

4. A granulating device for thermoplastic elastomer according to claim 1, characterized in that: The knife cover (51) is entirely made of transparent material.

5. A granulating device for thermoplastic elastomer according to claim 1, characterized in that: The top of the knife cover (51) is connected to a tuyere (57), the bottom tuyere of the tuyere (57) is connected to the knife cover (51), and the top of the tuyere (57) is provided with a connecting port (58).

6. A granulating device for thermoplastic elastomer according to claim 5, characterized in that: Three air ducts are arranged inside the air nozzle (57), and the three air ducts are respectively a straight air duct in the middle and lateral air ducts on both sides.

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