Side feeding dust collection device of double-screw extruder

Abstract

The utility model discloses a side feeding dust collection device of a twin-screw extruder, which relates to the field of twin-screw extruders and comprises an extruder main body, a first motor is fixedly mounted at the end of the extruder main body, a blanking hopper is fixedly mounted at the top of the extruder main body, and a feeding hopper is fixedly mounted at the top of the blanking hopper. A feeding opening is formed in the side wall of the feeding hopper, a dust collection mechanism is arranged at the top of the feeding hopper and comprises a dust collection cover fixedly installed at the top of the feeding hopper, a dust collection fan is fixedly installed at the top of the dust collection cover, a second motor is arranged on the outer wall of the dust collection fan, and a corrugated pipe is fixedly installed at the end of the dust collection fan; the end part of the corrugated pipe is connected with a dust collecting box which is fixedly mounted on the outer wall of the extruder main body, and a discharging mechanism is arranged in the discharging hopper. The side feeding dust collection device of the double-screw extruder effectively adsorbs dust doped in raw materials, ensures the production quality of extruded products, improves the use effect of the raw materials, and ensures the cleanness and sanitation of the production environment.

Description

Technical Field

[0001] This utility model relates to the technical field of twin-screw extruders, specifically to a side-feeding dust collection device for twin-screw extruders. Background Technology

[0002] Extruders rely on the pressure and shear force generated by the rotating screw to fully plasticize and uniformly mix materials. Through die forming, they are widely used in the blending modification of polymer materials such as general plastics, engineering plastics, and thermoplastic rubber, as well as in the processing of special fibers and special adhesives. Twin-screw extruders were developed based on single-screw extruders. Twin-screw extruders have good feeding performance, mixing and plasticizing performance, venting performance, and extrusion stability. They are now widely used in the molding and processing of extruded products.

[0003] In the prior art, Chinese patent application number CN202420357129.7 discloses a twin-screw extruder that facilitates cavity cleaning, including a shell. A feed port is fixedly connected to the upper left part of the shell, and a discharge port is fixedly connected to the lower right part of the shell. A No. 1 motor is fixedly connected to the left end of the shell. Rectangular slots are opened on the upper front and upper rear parts of the shell. A rotating rod is fixedly connected to the output end of the No. 1 motor. A rotating rod is movably connected between the left and right inner walls of the rear part of the shell. Spiral conveying blades are fixedly connected to the outer surfaces of the two rotating rods. A snap-fit ​​gear is fixedly connected to the right end of the two rotating rods. The movable frame can remove the material adhering to the inside of the shell and facilitate the overall movement and handling of the device, improving the overall user experience.

[0004] Based on the above information, it can be seen that the existing technology cannot adsorb dust mixed in the raw materials during actual use, resulting in dust being mixed in with the molten raw materials, affecting the quality of the raw material extrusion, reducing the effectiveness of the raw materials, and the dust raised during feeding will affect the production environment. Therefore, further improvements are needed. Utility Model Content

[0005] The purpose of this utility model is to provide a side-feeding dust collection device for a twin-screw extruder, in order to solve the problems mentioned in the background art, such as the inability to adsorb dust mixed in the raw material during feeding, resulting in dust mixed in the molten raw material, affecting the quality of the raw material extrusion, reducing the use effect of the raw material, and the dust raised during feeding affecting the production environment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a side-feeding dust collection device for a twin-screw extruder, comprising an extruder body, a first motor fixedly installed at the end of the extruder body, a first pulley fixedly installed on the outer wall of the first motor, a discharge hopper fixedly installed on the top of the extruder body, a feeding hopper fixedly installed on the top of the discharge hopper, a feeding port opened on the side wall of the feeding hopper, and a dust collection mechanism for adsorbing dust from raw materials provided on the top of the feeding hopper;

[0007] The dust collection mechanism includes a dust collection hood fixedly installed on the top of the feeding hopper, a dust collection fan fixedly installed on the top of the dust collection hood, and a second motor installed on the outer wall of the dust collection fan. A filter screen is fixedly installed on the top of the feeding hopper. A corrugated pipe is fixedly installed at the end of the dust collection fan, and a dust collection box fixedly installed on the outer wall of the extruder body is connected to the end of the corrugated pipe. A dust discharge port is opened at the bottom of the dust collection box. A feeding mechanism for preventing blockage is provided inside the feeding hopper.

[0008] Furthermore, the bottom of the feeding hopper is connected to the top of the discharge hopper, and the top of the feeding hopper is connected to the bottom of the dust collection hood, and the lower part of the feeding hopper has an inverted frustum shape.

[0009] Furthermore, the bottom of the dust hood is designed in the shape of a frustum, and the inner diameter of the dust hood corresponds to the inner diameter of the feeding hopper. The filter screen is located between the feeding hopper and the dust hood, and the outer diameter of the filter screen corresponds to the inner diameter of the dust hood. Moreover, the filter screen holes on the outer wall of the filter screen are smaller than the diameter of the raw material particles.

[0010] Furthermore, one end of the corrugated pipe is connected to the dust outlet of the vacuum fan, and the other end of the corrugated pipe is connected to the top of the dust collection box.

[0011] Furthermore, the bottom of the dust collection box is designed in the shape of an inverted trapezoid, and the bottom of the dust collection box is equipped with a valve that is compatible with the dust discharge port.

[0012] Furthermore, the feeding mechanism includes a rotating shaft rotatably mounted on the outer wall of the feeding hopper, and a lever plate is fixedly mounted on the outer wall of the rotating shaft. A second pulley is fixedly mounted at the end of the rotating shaft, and a transmission belt connected to the outer wall of the first pulley is mounted on the outer wall of the second pulley.

[0013] Furthermore, the length of the rotating shaft is greater than the width of the hopper, and the rotating shaft is arranged parallel to the first motor.

[0014] Furthermore, the length of the deflector plate is less than the distance between the inner wall of the hopper and the outer wall of the rotating shaft, and multiple sets of deflectors plate are arranged at equal angles on the outer wall of the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This twin-screw extruder side-feeding dust collection device, through a dust collection mechanism set at the top of the feed hopper, allows raw materials to enter the feed hopper from the feed port when the extruder is in operation. The second motor drives the dust collection fan, which then adsorbs dust mixed in with the raw materials through the dust collection hood. At the same time, the screen set at the top of the feed hopper filters and blocks a small portion of the adsorbed raw material particles at the bottom of the screen, preventing the adsorption of raw material particles while adsorbing dust. The adsorbed dust enters the dust collection box on the outer wall of the extruder through the dust collection fan and the corrugated pipe. When the dust collection hood is full, the dust discharge port is opened to uniformly dispose of the adsorbed dust, thereby ensuring the production quality of the extruded products, improving the utilization effect of raw materials, and ensuring a clean and hygienic production environment.

[0017] Furthermore, through the feeding mechanism set inside the feeding hopper, after the raw material enters the feeding hopper, the first motor drives the second pulley to rotate through the first pulley and the transmission belt. The second pulley drives the rotating shaft to rotate, and the rotating shaft drives multiple sets of baffles to rotate inside the feeding hopper, thereby pushing the raw material into the extruder body below for extrusion. While the baffles are rotating, they strike the raw material, causing the dust attached to the outer wall of the raw material to be lifted up, so that it can be better absorbed by the dust collection mechanism, achieving the anti-clogging effect while further improving the dust adsorption effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0020] Figure 3 This is a three-dimensional structural diagram of the feeding mechanism of this utility model;

[0021] Figure 4 This is a three-dimensional cross-sectional view of the present invention after removing the main body of the extruder;

[0022] Figure 5 This is a three-dimensional cross-sectional structural diagram of the corrugated pipe and dust collection box of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the rotating shaft, the shift plate, and the second pulley of this utility model.

[0024] In the diagram: 1. Extruder body; 101. First motor; 102. First pulley; 2. Feed hopper; 3. Feeding hopper; 31. Feeding port; 4. Dust hood; 401. Filter screen; 402. Dust suction fan; 403. Corrugated pipe; 404. Dust collection box; 405. Dust discharge port; 406. Second motor; 5. Rotating shaft; 501. Actuating plate; 502. Second pulley; 503. Drive belt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figure 1-6 This utility model provides the following technical solution: a side-feeding dust collection device for a twin-screw extruder, comprising an extruder body 1, a first motor 101 fixedly installed at the end of the extruder body 1, and a first pulley 102 fixedly installed on the outer wall of the first motor 101, a feed hopper 2 fixedly installed on the top of the extruder body 1, and a feed hopper 3 fixedly installed on the top of the feed hopper 2, with a feed port 31 opened on the side wall of the feed hopper 3, and a dust collection mechanism for adsorbing dust from the raw materials provided on the top of the feed hopper 3, the dust collection mechanism including a dust collection hood 4 fixedly installed on the top of the feed hopper 3, a dust collection fan 402 fixedly installed on the top of the dust collection hood 4, and a second motor 406 provided on the outer wall of the dust collection fan 402, a filter screen 401 fixedly installed on the top of the feed hopper 3, and a corrugated pipe 403 fixedly installed at the end of the dust collection fan 402, with the end of the corrugated pipe 403 connected to... A dust collection box 404 is fixedly installed on the outer wall of the extruder body 1, and a dust discharge port 405 is opened at the bottom of the dust collection box 404. The bottom of the feeding hopper 3 is connected to the top of the unloading hopper 2, and the top of the feeding hopper 3 is connected to the bottom of the dust collection hood 4. The lower part of the feeding hopper 3 is designed as an inverted frustum. The bottom of the dust collection hood 4 is designed as a frustum. The inner diameter of the dust collection hood 4 corresponds to the inner diameter of the feeding hopper 3. The filter screen 401 is located between the feeding hopper 3 and the dust collection hood 4. The outer diameter of the filter screen 401 corresponds to the inner diameter of the dust collection hood 4. The holes of the filter screen 401 on the outer wall are smaller than the diameter of the raw material particles. One end of the corrugated pipe 403 is connected to the dust outlet of the dust collection fan 402, and the other end of the corrugated pipe 403 is connected to the top of the dust collection box 404. The bottom of the dust collection box 404 is designed as an inverted trapezoidal truncated cone, and a valve adapted to the dust discharge port 405 is provided at the bottom of the dust collection box 404.

[0027] During operation, the first motor 101 is started, and the extruder body 1 begins to work. Through the dust collection mechanism located at the top of the feed hopper 3, the raw material enters the feed hopper 3 from the feed port 31. The second motor 406 is then started, driving the dust collection fan 402. The dust collection fan 402 uses the dust collection hood 4 to absorb dust mixed in with the raw material. Simultaneously, the screen at the top of the feed hopper 3 filters and blocks a small portion of the adsorbed raw material particles at the bottom of the screen, preventing accidental adsorption of raw material particles while adsorbing dust. The adsorbed dust enters the dust collection box 404 on the outer wall of the extruder through the corrugated pipe 403 via the dust collection fan 402. When the dust collection hood is full, the dust discharge port 405 is opened to uniformly dispose of the adsorbed dust, thereby ensuring the quality of the extruded product, improving the efficiency of raw material utilization, and ensuring a clean and hygienic production environment.

[0028] Example 2: Based on Example 1, a feeding mechanism is also disclosed, the specific structure of which is as follows: The feeding hopper 2 is provided with a feeding mechanism to prevent blockage. The feeding mechanism includes a rotating shaft 5 rotatably installed on the outer wall of the feeding hopper 2, and a deflector plate 501 is fixedly installed on the outer wall of the rotating shaft 5. A second pulley 502 is fixedly installed at the end of the rotating shaft 5, and a transmission belt 503 connected to the outer wall of the first pulley 102 is installed on the outer wall of the second pulley 502. The length of the rotating shaft 5 is greater than the width of the feeding hopper 2, and the rotating shaft 5 is arranged parallel to the first motor 101. The length of the deflector plate 501 is less than the distance between the inner wall of the feeding hopper 2 and the outer wall of the rotating shaft 5, and multiple sets of deflector plates 501 are arranged at equal angles on the outer wall of the rotating shaft 5.

[0029] After the raw material enters the discharge hopper 2 from the feeding hopper 3, the first motor 101 drives the first pulley 102 to rotate. The first pulley 102 drives the second pulley 502 to rotate through the transmission belt 503. The second pulley 502 drives the rotating shaft 5 to rotate. The rotating shaft 5 drives multiple sets of baffles 501 to rotate in the discharge hopper 2, thereby pushing the raw material into the extruder body 1 below for extrusion. While the baffles 501 are rotating, they strike the raw material, causing the dust attached to the outer wall of the raw material to be lifted up, so that it can be better absorbed by the dust collection mechanism, achieving the anti-clogging effect while further improving the dust adsorption effect.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double screw extruder side feeding dust collection device, comprising an extruder body (1), a first motor (101) fixedly installed at the end of the extruder body (1), a first pulley (102) fixedly installed on the outer wall of the first motor (101), a lower hopper (2) fixedly installed at the top of the extruder body (1), a feeding hopper (3) fixedly installed at the top of the lower hopper (2), and a feeding opening (31) formed in the side wall of the feeding hopper (3), and a dust collection mechanism for adsorbing dust of raw materials arranged on the top of the feeding hopper (3); characterized in that The dust collection mechanism comprises a dust collection cover (4) fixedly installed on the top of the feeding hopper (3), a dust collection fan (402) fixedly installed on the top of the dust collection cover (4), and a second motor (406) arranged on the outer wall of the dust collection fan (402), a filter screen (401) fixedly installed on the top of the feeding hopper (3), a corrugated pipe (403) fixedly installed on the end of the dust collection fan (402), and a dust collection box (404) fixedly installed on the outer wall of the extruder body (1) and connected with the end of the corrugated pipe (403), and a dust discharge opening (405) formed in the bottom of the dust collection box (404), and a discharging mechanism for preventing blockage arranged in the lower hopper (2).

2. A side feeding dust extraction device for a twin screw extruder according to claim 1, characterized in that: The bottom of the feeding hopper (3) is communicated with the top of the lower hopper (2), the top of the feeding hopper (3) is communicated with the bottom of the dust collection cover (4), and the lower part of the feeding hopper (3) is designed in an inverted circular table shape.

3. A side feeding dust extraction device for a twin screw extruder according to claim 1, characterized in that: The bottom of the dust collection cover (4) is designed in a circular table shape, the inner diameter of the dust collection cover (4) corresponds to the inner diameter of the feeding hopper (3), the filter screen (401) is located between the feeding hopper (3) and the dust collection cover (4), the outer diameter of the filter screen (401) corresponds to the inner diameter of the dust collection cover (4), and the hole diameter of the filter screen (401) on the outer wall of the filter screen (401) is smaller than the diameter of the raw material particles.

4. A dual screw extruder side feeding dust extraction device according to claim 1, characterized in that: One end of the corrugated pipe (403) is communicated with the dust discharge opening of the dust collection fan (402), and the other end of the corrugated pipe (403) is communicated with the top of the dust collection box (404).

5. A side feeding dust extraction device for a twin screw extruder according to claim 1, characterized in that: The bottom of the dust collection box (404) is designed in an inverted ladder table shape, and a valve corresponding to the dust discharge opening (405) is arranged on the bottom of the dust collection box (404).

6. A dual screw extruder side feeding dust extraction device according to claim 1, characterized in that: The discharging mechanism comprises a rotating shaft (5) rotatably installed on the outer wall of the lower hopper (2), a push plate (501) fixedly installed on the outer wall of the rotating shaft (5), a second pulley (502) fixedly installed on the end of the rotating shaft (5), and a transmission belt (503) connected with the outer wall of the first pulley (102) and installed on the outer wall of the second pulley (502).

7. A dual screw extruder side feeding dust extraction device according to claim 6, characterized in that: The length of the rotating shaft (5) is greater than the width of the lower hopper (2), and the rotating shaft (5) is arranged in parallel with the first motor (101).

8. A dual screw extruder side feeding dust extraction device according to claim 6, characterized in that: The length of the push plate (501) is smaller than the distance between the inner wall of the lower hopper (2) and the outer wall of the rotating shaft (5), and a plurality of groups of the push plate (501) are arranged at equal angles on the outer wall of the rotating shaft (5).

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