Granulation structure of double-screw extruder

Abstract

The utility model discloses a pelletizing structure of a twin-screw extruder, which relates to the technical field of twin-screw extruders, and comprises an extruder main body fixed on a U-shaped rack in a penetrating manner, an extrusion head is arranged at one end of the extruder main body, and two extrusion screws are rotatably mounted in the extruder main body. And a splash-proof cover is fixedly installed on the outer wall of one side of the U-shaped rack, one end of one extrusion screw extends into the extrusion head and is fixedly connected with a pelletizing cutter, a cooling mechanism is arranged in the splash-proof cover, and the cooling mechanism comprises two air cooling assemblies and a transmission assembly. The effect that the pelletizing cutter and the two fan blades rotate together is achieved without an independent power source, and the advantage that the equipment cost investment is reduced is achieved in the true sense; and an activated carbon odor removal plate is installed, so that peculiar smell emitted by the plastic particles can be purified to a certain degree, the surrounding air environment can be improved to a certain degree, and the body health of workers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of twin-screw extruders, in particular to a pelletizing structure of a twin-screw extruder. Background Art

[0002] The twin-screw extruder is developed based on the single-screw extruder. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in the molding processing of extruded products. As for the basic mechanism of the extrusion process, in simple terms, a screw rotates in the barrel and pushes the plastic forward. The screw structure is an inclined plane or slope wrapped around the center layer. Its purpose is to increase pressure in order to overcome greater resistance.

[0003] After searching, the patent with application number 202220675814.5 discloses a pelletizing structure of a twin-screw extruder, which includes a mounting platform, a splash-proof box and a pelletizing head. The mounting platform is equipped with an extrusion mechanism and a driving mechanism, the inner side of the extrusion mechanism is rotatably connected with a screw, and a pelletizing head is installed at one end of the extrusion mechanism. The utility model can reduce the equipment cost investment by driving the pelletizing head to operate by a screw; the use of a motor to drive the fan blade to rotate in conjunction with the setting of heat dissipation holes can quickly cool down the inside of the splash-proof box.

[0004] Although the operation of the pelletizing head of the above patent does not require a separate power source, it is equipped with two motors to drive two fan blades to rotate for heat dissipation and cooling. This practice will increase the investment cost of the entire equipment and cannot truly achieve the advantage of reducing equipment cost investment. In addition, during the pelletizing process, the odor emitted by the plastic particles will cause certain pollution to the surrounding air environment. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a pelletizing structure for a twin-screw extruder.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pelletizing structure of a twin-screw extruder comprises an extruder body which penetrates and is fixed on a U-shaped frame, an extrusion head is arranged at one end of the extruder body, and two extrusion screws are rotatably installed in the extruder body;

[0008] A splash shield is fixedly installed on one side outer wall of the U-shaped frame, and one end of one of the extrusion screws extends into the extrusion head and is fixedly connected to a pelletizer. A cooling mechanism is provided in the splash shield, and the cooling mechanism includes two air cooling components and a transmission component.

[0009] Preferably, the two air-cooling components each include a ventilation hole opened on one side of the splash shield, a support frame fixedly connected to the inner wall of one side of the splash shield, a transmission shaft rotatably mounted on the support frame, and a fan blade fixedly mounted on the transmission shaft and located in the ventilation hole.

[0010] Preferably, the transmission assembly includes a single-groove pulley fixedly mounted on two transmission shafts in sequence, a linkage shaft coaxially fixedly connected to one end of one of the extrusion screws through a coupling, and a double-groove pulley fixedly mounted on the linkage shaft.

[0011] Preferably, two protective mesh covers are fixedly connected to an outer wall of one side of the splash shield, and evenly distributed heat dissipation holes are opened on the top of the splash shield, and the positions of the two protective mesh covers are respectively matched with the positions of the two ventilation holes.

[0012] Preferably, the double-groove pulley is respectively connected to the two single-groove pulleys through two transmission belts.

[0013] Preferably, an insertion channel is provided in the splash shield, an activated carbon deodorizing plate is inserted into the insertion channel, and an iron bar is fixedly connected to the side wall of the activated carbon deodorizing plate.

[0014] Preferably, two permanent magnets are fixedly connected to an outer wall of one side of the splash shield, and both permanent magnets are attracted to the iron bar.

[0015] The beneficial effects of the utility model are:

[0016] 1. When the twin-screw extruder of the utility model is working, the pelletizer fixedly connected to one of the extrusion screws will rotate to pelletize the plastic to be extruded in the extrusion head, and the double-groove pulley on the linkage shaft will also rotate. Under the drive of the two transmission belts, the two single-groove pulleys will drive the two fan blades on the two transmission shafts to rotate to cool the high-temperature plastic particles after pelletizing. In this process, the utility model does not have a separate power source to achieve the effect of rotating the pelletizer and the two fan blades together, which truly achieves the advantage of reducing equipment cost investment;

[0017] 2. The utility model installs an activated carbon deodorizing plate which can purify the odor emitted by the plastic particles to a certain extent, which can improve the surrounding air environment to a certain extent and is beneficial to the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the splash shield in the utility model after the front edge is cut off;

[0020] Figure 3It is a three-dimensional enlarged structural diagram of the inner area of ​​the splash shield in the utility model;

[0021] Figure 4 It is a three-dimensional enlarged structural schematic diagram of two protective mesh cover areas in the utility model.

[0022] In the figure: 1. U-shaped frame; 2. Extruder body; 3. Splash shield; 4. Extrusion head; 5. Extrusion screw; 6. Pellet cutter; 7. Support frame; 8. Transmission shaft; 9. Fan blade; 10. Single-groove pulley; 11. Linkage shaft; 12. Double-groove pulley; 13. Transmission belt; 14. Protective mesh cover; 15. Insert; 16. Activated carbon deodorizing plate; 17. Iron bar; 18. Permanent magnet; 19. Heat dissipation hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Example 1, reference Figure 1-4 A pelletizing structure of a twin-screw extruder includes an extruder body 2 which is fixed on a U-shaped frame 1, an extruder head 4 is provided at one end of the extruder body 2, and two extrusion screws 5 are rotatably installed in the extruder body 2;

[0025] In this embodiment, a splash shield 3 is fixedly installed on the outer wall of one side of the U-shaped frame 1, one end of one extrusion screw 5 extends into the extrusion head 4 and is fixedly connected to a pelletizer 6, and a cooling mechanism is provided in the splash shield 3, and the cooling mechanism includes two air cooling components and a transmission component;

[0026] Furthermore, the two air cooling components each include a ventilation hole opened on one side of the splash shield 3, a support frame 7 fixedly connected to the inner wall of one side of the splash shield 3, a transmission shaft 8 rotatably mounted on the support frame 7, and a fan blade 9 fixedly sleeved on the transmission shaft 8 and located in the ventilation hole;

[0027] Further, the transmission assembly includes a single-groove pulley 10 fixedly mounted on the two transmission shafts 8 in sequence, a linkage shaft 11 coaxially fixedly connected to one end of one of the extrusion screws 5 through a coupling, and a double-groove pulley 12 fixedly mounted on the linkage shaft 11, and the double-groove pulley 12 is respectively connected to the two single-groove pulleys 10 through two transmission belts 13;

[0028] Furthermore, two protective mesh covers 14 are fixedly connected to one side outer wall of the splash shield 3, and evenly distributed heat dissipation holes 19 are opened on the top of the splash shield 3, and the positions of the two protective mesh covers 14 are respectively adapted to the positions of the two ventilation holes;

[0029] During the specific implementation of this embodiment: when the twin-screw extruder is working, the pelletizer 6 fixedly connected to one of the extrusion screws 5 will rotate to pelletize the plastic to be extruded in the extrusion head 4, and the double-groove pulley 12 on the linkage shaft 11 will also rotate. Under the transmission of the two transmission belts 13, the two single-groove pulleys 10 will drive the two fan blades 9 on the two transmission shafts 8 to rotate to cool the high-temperature plastic particles after pelletizing. In this process, the utility model does not have to be equipped with a separate power source to achieve the effect of rotating the pelletizer 6 and the two fan blades 9 together, thus truly achieving the advantage of reducing equipment cost investment.

[0030] Example 2, reference Figure 2-4 This embodiment is optimized on the basis of embodiment 1, specifically:

[0031] An insertion channel 15 is provided in the splash shield 3, an activated carbon deodorizing plate 16 is inserted in the insertion channel 15, an iron bar 17 is fixedly connected to the side wall of the activated carbon deodorizing plate 16, and two permanent magnets 18 are fixedly connected to the outer wall of one side of the splash shield 3, and the two permanent magnets 18 are attracted to the iron bar 17;

[0032] In this embodiment, the activated carbon deodorizing plate 16 is inserted into the splash shield 3 along the insertion channel 15. After being inserted into place, the iron bar 17 thereon will be attracted by the two permanent magnets 18 to be fixed. Then, the activated carbon deodorizing plate 16 after installation can purify the odor emitted by the plastic particles to a certain extent, which can improve the surrounding air environment to a certain extent and is beneficial to the health of the staff.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pelletizing structure of a twin-screw extruder, comprising an extruder body (2) penetrating and fixed on a U-shaped frame (1), an extrusion head (4) being provided at one end of the extruder body (2), and two extrusion screws (5) being rotatably mounted in the extruder body (2); It is characterized in that A splash shield (3) is fixedly mounted on one side outer wall of the U-shaped frame (1), and one end of one of the extrusion screws (5) extends into the extrusion head (4) and is fixedly connected to a pelletizer (6). A cooling mechanism is provided in the splash shield (3), and the cooling mechanism includes two air cooling components and a transmission component.

2. The pelletizing structure of a twin-screw extruder according to claim 1, characterized in that: The two air cooling components each comprise a ventilation hole opened on one side of the splash shield (3), a support frame (7) fixedly connected to the inner wall of one side of the splash shield (3), a transmission shaft (8) rotatably mounted on the support frame (7), and a fan blade (9) fixedly sleeved on the transmission shaft (8) and located in the ventilation hole.

3. The pelletizing structure of a twin-screw extruder according to claim 1, characterized in that: The transmission assembly comprises a single-groove pulley (10) fixedly mounted on two transmission shafts (8) in sequence, a linkage shaft (11) coaxially fixedly connected to one end of one of the extrusion screws (5) via a coupling, and a double-groove pulley (12) fixedly mounted on the linkage shaft (11).

4. The pelletizing structure of a twin-screw extruder according to claim 1, characterized in that: Two protective mesh covers (14) are fixedly connected to an outer wall of one side of the splash cover (3), and evenly distributed heat dissipation holes (19) are provided on the top of the splash cover (3), and the positions of the two protective mesh covers (14) are respectively matched with the positions of the two ventilation holes.

5. The pelletizing structure of a twin-screw extruder according to claim 3, characterized in that: The double-groove pulley (12) is respectively connected to the two single-groove pulleys (10) via two transmission belts (13).

6. The pelletizing structure of a twin-screw extruder according to claim 1, characterized in that: The splash shield (3) is provided with an insertion channel (15), an activated carbon deodorizing plate (16) is inserted into the insertion channel (15), and an iron bar (17) is fixedly connected to the side wall of the activated carbon deodorizing plate (16).

7. The pelletizing structure of a twin-screw extruder according to claim 1, characterized in that: Two permanent magnets (18) are fixedly connected to an outer wall of one side of the splash shield (3), and both permanent magnets (18) are attracted to the iron bar (17).

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