Feeding mechanism of screw extruder

Abstract

The utility model relates to the technical field of master batch production, and discloses a feeding mechanism of a screw extruder, which comprises a mixing hopper, a cover plate is detachably arranged above the mixing hopper, the top surface of the cover plate is communicated and fixed with two feeding pipes, the outer walls of the feeding pipes are communicated and fixed with a feeding hopper, and the feeding hopper is communicated with the mixing hopper. A first feeding port is formed in the outer wall of the feeding pipe, a first auger shaft is arranged in the feeding pipe, and a first auger is connected to the outer wall of the first auger shaft. According to the feeding device, the first auger is driven by the first driving motor to start to rotate, the first rotating rod, the second rotating rod and the second auger shaft are driven by the second driving motor to start to rotate at the same time, at the moment, raw materials needing to be processed are fed into the feeding hoppers respectively, and the raw materials are stably conveyed to the second feeding port through rotation of the first auger; the feeding stability and continuity of the raw materials are guaranteed, and at the moment, the raw materials firstly fall on the outer wall of the cone frustum, then fall into the mixing hopper and finally fall into the extruder.

Description

Technical Field

[0001] This utility model relates to the technical field of masterbatch production, specifically to a feeding mechanism for a screw extruder. Background Technology

[0002] Screw extruders are important plastic machinery widely used in the rubber and plastics processing industries. They work by feeding solid materials between a screw and a barrel, where the rotating screw extrudes, shears, and agitates the material, heating and plasticizing it. The resulting product is then continuously extruded from the die head into the desired shape. Before entering the extruder, the raw material must first be fed into a feeder.

[0003] According to Chinese Patent No. CN207224352U, a feeding mechanism for a color masterbatch adding device includes a feeding pipe and a support. A filter screen with a pore size equal to the outer diameter of the color masterbatch is slidably connected inside the feeding pipe. A driving component is provided on the support for driving the filter screen to move up and down reciprocally along the extension direction of the feeding pipe.

[0004] In the above scheme, the masterbatch is filtered through a filter screen connected inside the feed pipe. However, the above scheme still has the following shortcomings: although the filter can remove excess impurities, the raw materials still need to be added manually during the feeding process, and the effect of continuous feeding cannot be achieved. Utility Model Content

[0005] The purpose of this invention is to provide a feeding mechanism for a screw extruder to solve the problem that manual feeding of raw materials is still required during the feeding process, making continuous feeding impossible.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a feeding mechanism for a screw extruder, comprising a mixing hopper, a cover plate detachably disposed above the mixing hopper, two feeding pipes fixedly connected to the top surface of the cover plate, a feeding hopper fixedly connected to the outer wall of the feeding pipes, a first feeding port opened on the outer wall of the feeding pipes, the lower end of the feeding hopper passing through the first feeding port, a first auger shaft disposed inside the feeding pipes, a first auger connected to the outer wall of the first auger shaft, and the outer wall of the first auger fitting against the inner wall of the feeding pipes.

[0007] Preferably, one end of the feed pipe is detachably connected to a sealing ring, one side of the sealing ring is connected to a first drive motor, the drive end of the first drive motor passes through the inside of the sealing ring, the drive end of the first drive motor is connected to the first auger, the top surface of the cover plate has two second feed ports, and the other end of the feed pipe passes through the second feed ports.

[0008] Preferably, the top surface of the mixing hopper is connected to a heightening ring, a first rotating rod is rotatably arranged inside the heightening ring, a truncated cone is arranged inside the heightening ring, the first rotating rod passes through the interior of the truncated cone, the heightening ring and the truncated cone are of equal height, and the top surface of the truncated cone is in contact with the bottom surface of the cover plate.

[0009] Preferably, a second rotating rod is connected to the lower end of the outer wall of the first rotating rod, and two mixing arms are connected through the interior of the second rotating rod, wherein the length of the second rotating rod is equal to the height of the mixing hopper, and the outer wall of the mixing arm is in contact with the inner wall of the mixing hopper.

[0010] Preferably, a second auger shaft is internally connected to the second rotating rod, and a second auger is connected to the outer wall of the exposed portion of the second auger shaft. A discharge pipe is connected to the bottom surface of the mixing hopper, and the length of the exposed portion of the second auger shaft is equal to the height of the discharge pipe.

[0011] Preferably, a second drive motor is mounted on the top surface of the cover plate, the drive end of the second drive motor passes through the cover plate, and the drive end of the second drive motor is connected to the first rotating rod.

[0012] Compared with the prior art, the feeding mechanism of a screw extruder that adopts the above technical solution has the following beneficial effects:

[0013] 1. During use, the operator first starts the first drive motor and the second drive motor. At this time, the first drive motor drives the first auger shaft, which in turn drives the first auger to start rotating. The second drive motor drives the first rotating rod to start rotating. Since the first rotating rod is connected to the second rotating rod and the second auger shaft, the first rotating rod, the second rotating rod and the second auger shaft will start rotating simultaneously. At this time, the raw materials to be processed are put into the feed hopper. The raw materials will enter the feed pipe through the first feed port. The rotation of the first auger can stably transport the raw materials to the second feed port, ensuring the stability and continuity of the raw material supply. At this time, the raw materials will first fall on the outer wall of the cone, and then fall into the interior of the mixing hopper. The mixing arm drives the second rotating rod to perform preliminary mixing, and then falls into the interior of the discharge pipe, and finally falls into the extruder.

[0014] Second, during use, the fan-shaped outer wall of the truncated cone and the first rotating rod drive the truncated cone to rotate, which can disperse the raw materials falling on the truncated cone, thereby ensuring that the raw materials can fall evenly into the interior of the mixing hopper. This prevents the mixing speed from fluctuating due to unstable supply after the raw materials enter the mixing hopper, and improves the stability of mixing.

[0015] Third, during use, the two mixing arms are driven to rotate by the second rotating rod, thereby initially mixing the raw materials inside the mixing hopper. The second auger connected to the outer wall of the second auger shaft can not only stably enter the extruder after initial mixing, but also further mix the raw materials, thus improving the mixing efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment.

[0017] Figure 2 This is a breakdown diagram of an embodiment.

[0018] Figure 3 This is a schematic diagram showing the splitting of the mixing hopper in an embodiment.

[0019] Figure 4 This is a schematic diagram showing the disassembly of the feed pipe in an embodiment.

[0020] In the diagram: 1. Mixing hopper; 2. Cover plate; 3. Feed pipe; 4. Feed hopper; 5. First feed inlet; 6. First auger shaft; 7. First auger; 8. Sealing ring; 9. First drive motor; 10. Second feed inlet; 11. Heightening ring; 12. First rotating rod; 13. Frustum cone; 14. Second rotating rod; 15. Mixing arm; 16. Second auger shaft; 17. Second auger; 18. Discharge pipe; 19. Second drive motor. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, a feeding mechanism for a screw extruder includes a mixing hopper 1. A cover plate 2 is detachably mounted on the top of the mixing hopper 1. Two feed pipes 3 are fixedly connected to the top surface of the cover plate 2. A feed hopper 4 is fixedly connected to the outer wall of the feed pipes 3. A first feed inlet 5 is opened on the outer wall of the feed pipes 3. The lower end of the feed hopper 4 passes through the first feed inlet 5. A first auger shaft 6 is installed inside the feed pipe 3. A first auger 7 is connected to the outer wall of the first auger shaft 6. The outer wall of the first auger 7 is in contact with the inner wall of the feed pipe 3. A sealing ring 8 is detachably connected to one end of the feed pipe 3. A first drive motor 9 is connected to one side of the sealing ring 8. The drive end of the first drive motor 9 passes through the inside of the sealing ring 8 and is connected to the first auger 7. Two second feed inlets 10 are opened on the top surface of the cover plate 2. The other end of the feed pipe 3 passes through the second feed inlets 10.

[0023] In operation, the operator first starts the first drive motor 9 and the second drive motor 19. At this time, the first drive motor 9 drives the first auger shaft 6, which in turn drives the first auger 7 to start rotating. The second drive motor 19 drives the first rotating rod 12 to start rotating. Since the first rotating rod 12 is connected to the second rotating rod 14 and the second auger shaft 16, the first rotating rod 12, the second rotating rod 14 and the second auger shaft 16 will start rotating simultaneously. At this time, the raw materials to be processed are put into the feed hopper 4. The raw materials will enter the feed pipe 3 through the first feed port 5. The rotation of the first auger 7 can stably transport the raw materials to the second feed port 10, ensuring the stability and continuity of the raw material supply. At this time, the raw materials will first fall on the outer wall of the cone 13, and then fall into the interior of the mixing hopper 1. The second rotating rod 14 drives the mixing arm 15 to perform preliminary mixing, and then fall into the interior of the discharge pipe 18, and finally fall into the extruder.

[0024] like Figures 1-3 As shown, a heightening ring 11 is connected to the top surface of the mixing hopper 1. A first rotating rod 12 is rotatably arranged inside the heightening ring 11. A truncated cone 13 is arranged inside the heightening ring 11. The first rotating rod 12 passes through the interior of the truncated cone 13. The heights of the heightening ring 11 and the truncated cone 13 are equal. The top surface of the truncated cone 13 is in contact with the bottom surface of the cover plate 2. A second rotating rod 14 is connected to the lower end of the outer wall of the first rotating rod 12. Two mixing arms 15 are connected through the interior of the second rotating rod 14. The length of the second rotating rod 14 is equal to the height of the mixing hopper 1. The outer wall of the mixing arms 15 is in contact with the inner wall of the mixing hopper 1. A second auger shaft 16 is connected inside the second rotating rod 14. A second auger 17 is connected to the outer wall of the exposed part of the second auger shaft 16. A discharge pipe 18 is connected to the bottom surface of the mixing hopper 1. The length of the exposed part of the second auger shaft 16 is equal to the height of the discharge pipe 18.

[0025] In use, the cone 13 is rotated by the fan-shaped outer wall of the cone 13 and the first rotating rod 12, which can disperse the raw material falling on the cone 13, thereby ensuring that the raw material can fall evenly into the interior of the mixing hopper 1. This prevents the mixing speed from fluctuating due to unstable supply after the raw material enters the mixing hopper 1, and improves the stability of mixing.

[0026] like Figure 1 and Figure 2 As shown, a second drive motor 19 is installed on the top surface of the cover plate 2. The drive end of the second drive motor 19 passes through the cover plate 2 and is connected to the first rotating rod 12.

[0027] In use, the two mixing arms 15 are driven to rotate by the second rotating rod 14, thereby initially mixing the raw materials inside the mixing hopper 1. The second auger 17 connected to the outer wall of the second auger shaft 16 can not only stably enter the extruder after initial mixing, but also further mix the raw materials, thus improving the mixing efficiency.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A feeding mechanism for a screw extruder, comprising a mixing hopper (1), characterized in that, A cover plate (2) is detachably provided on the top of the mixing hopper (1). Two feed pipes (3) are connected and fixed on the top surface of the cover plate (2). A feed hopper (4) is connected and fixed on the outer wall of the feed pipe (3). A first feed port (5) is opened on the outer wall of the feed pipe (3). The lower end of the feed hopper (4) passes through the first feed port (5). A first auger shaft (6) is provided inside the feed pipe (3). A first auger (7) is connected to the outer wall of the first auger shaft (6). The outer wall of the first auger (7) is in contact with the inner wall of the feed pipe (3). The top surface of the mixing hopper (1) is connected to a heightening ring (11). A first rotating rod (12) is rotatably arranged inside the heightening ring (11). A truncated cone (13) is arranged inside the heightening ring (11). The first rotating rod (12) passes through the interior of the truncated cone (13). The height of the heightening ring (11) and the truncated cone (13) are equal. The top surface of the truncated cone (13) is in contact with the bottom surface of the cover plate (2).

2. The feeding mechanism of a screw extruder according to claim 1, characterized in that: One end of the feed pipe (3) is detachably connected to a sealing ring (8), and a first drive motor (9) is connected to one side of the sealing ring (8). The drive end of the first drive motor (9) passes through the interior of the sealing ring (8), and the drive end of the first drive motor (9) is connected to the first auger (7). Two second feed ports (10) are opened on the top surface of the cover plate (2), and the other end of the feed pipe (3) passes through the second feed port (10).

3. The feeding mechanism of a screw extruder according to claim 1, characterized in that: The lower end of the outer wall of the first rotating rod (12) is connected to a second rotating rod (14), and two mixing arms (15) are connected through the interior of the second rotating rod (14). The length of the second rotating rod (14) is equal to the height of the mixing bucket (1), and the outer wall of the mixing arm (15) is in contact with the inner wall of the mixing bucket (1).

4. The feeding mechanism of a screw extruder according to claim 3, characterized in that: The second rotating rod (14) is internally connected to a second auger shaft (16), and the exposed part of the second auger shaft (16) is connected to a second auger (17). The bottom surface of the mixing hopper (1) is connected to a discharge pipe (18), and the length of the exposed part of the second auger shaft (16) is equal to the height of the discharge pipe (18).

5. The feeding mechanism of a screw extruder according to claim 1, characterized in that: A second drive motor (19) is installed on the top surface of the cover plate (2). The drive end of the second drive motor (19) passes through the cover plate (2) and is connected to the first rotating rod (12).

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