Modified plastic wire extruder

Abstract

The utility model provides a modified plastic line body extruding machine includes frame, the top fixed mounting of frame has the extruding cylinder, and the one end of extruding cylinder is fixed with the extruding die head through screw, rotates and is installed with the extruding screw in the inside, and the extruding screw outside wall and extruding cylinder inboard wall are inlayed. The other end of extruding cylinder is fixed with the main drive motor for drive extruding screw rotation, and its top is still fixed with the mixing hopper of inside intercommunication far from the one end of extruding die head. The extruding machine carries out modified plastic extruding operation, and personnel will introduce the raw material mixture into the crushing chamber, can effectively avoid the dust diffusion of the plastic raw material crushing to the air, reduces the influence to the environmental air quality, can prevent the talc powder in the mixture from drifting and losing, avoids its actual content to be lower than the formula design value, thereby solves the problem that the product rigidity is not enough, the modified plastic line body quality declines because of the talc powder ratio deficiency.

Description

Technical Field

[0001] This utility model relates to the field of extrusion machine technology, specifically to a modified plastic line extrusion machine. Background Technology

[0002] An extruder, also known as a plastic extrusion machine, is a production machine for plastic extrusion molding. Most plastic products are produced and manufactured using extruders. The process involves heating plastic raw materials to a molten state and then extruding and cooling them to form the final product.

[0003] The prior art, authorized by CN221456741U, discloses a high-speed extruder. This prior art extruder uses a crushing box located at the lower end of the feeding hopper, containing crushing components. A motor drives two sets of crushing rollers to rotate simultaneously inwards, causing the plastic granules to be crushed or flattened as they pass between the rollers. This allows for more thorough hot-melting, significantly shortening the hot-melting time and greatly increasing overall efficiency. However, this prior art extruder still has the following drawbacks when processing modified plastics:

[0004] To improve the rigidity of the plastic production line during the processing of modified plastics, talc powder is usually added to the raw materials. When the modified plastic raw materials are crushed using the extruder, the crushing mechanism generates dust as it crushes the talc powder. This dust easily backflows into the ambient air through the opening of the crushing mechanism's housing. This not only reduces air quality but also means that the actual talc content during the modified plastic processing may be lower than the ratio in the raw materials, resulting in insufficient product rigidity and reduced quality of the modified plastic production line. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a modified plastic extrusion line, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A modified plastic extrusion line includes a base, an extrusion cylinder fixedly mounted on the top of the base, an extrusion die head fixedly mounted on one end of the extrusion cylinder by screws, an extrusion screw rotatably mounted inside the extrusion cylinder, the outer wall of the extrusion screw being in contact with the inner wall of the extrusion cylinder, a main drive motor for driving the extrusion screw to rotate fixedly mounted on the other end of the extrusion cylinder, and a mixing hopper connected to the inside of the extrusion cylinder fixedly mounted on the top of the extrusion cylinder and at the end furthest from the extrusion die head.

[0008] A feeding frame is fixedly installed on the top of the machine base and on one side of the extrusion cylinder. A horizontal spiral feeding pipe is fixedly installed on the feeding frame. One end of the spiral feeding pipe passes through the top of the side wall of the mixing hopper and is connected to the inside of the mixing hopper. An auger rod is rotatably installed on the spiral feeding pipe and inside it. The outer side wall of the auger rod is in contact with the inner side wall of the spiral feeding pipe. A crushing chamber with an open top is fixedly installed on the feeding frame and above the spiral feeding pipe. A guide hopper is fixedly installed at the bottom of the crushing chamber. The bottom of the guide hopper passes through the top of the spiral feeding pipe and is connected to the inside of the crushing chamber. A double roller crushing assembly is installed in the crushing chamber for crushing the material in the crushing chamber.

[0009] A filter interface, connected to the bottom of the spiral feeding pipe and below the guide hopper, is provided. A filter chamber is inserted into the filter interface on the spiral feeding pipe. The outer wall of the filter chamber fits against the inner wall of the filter interface. An arc-shaped groove is provided on the top of the filter chamber. The outer wall of the auger rod fits against the inner wall of the arc-shaped groove. A positioning mechanism is installed on the filter chamber to position the filter chamber relative to the spiral feeding pipe. A filter plate is fixedly installed inside the filter chamber with screws. The top of the filter plate is arc-shaped, and the outer wall of the auger rod fits against the top of the filter plate. A negative pressure blower is fixedly installed inside the filter chamber. The outlet of the negative pressure blower is located on the side away from the spiral feeding pipe.

[0010] This invention provides a modified plastic extrusion line. Compared with the prior art, it has the following advantages:

[0011] 1. When extruding modified plastics, the process of guiding the raw material mixture for processing modified plastics into the crushing chamber effectively prevents dust generated from the crushing of plastic raw materials from being released into the ambient air, thus reducing the quality of the ambient air. At the same time, it effectively reduces the release of talc powder from the raw material mixture into the ambient air, which would otherwise result in the actual content of talc powder being lower than the ratio of plastic raw materials, causing insufficient product rigidity and reducing the quality of the modified plastics production line.

[0012] 2. By designing the air duct, the negative pressure fan is controlled to discharge the air in the spiral feeding pipe downward through the filter interface, so that the air flows into the air duct and is discharged downward through the cooling nozzle of the line body, thereby blowing onto the line body extruded through the extrusion die head, achieving a pre-cooling effect on the line body extruded through the extrusion die head.

[0013] 3. Through the design of the stirring shaft and stirring rods, when the raw materials are conveyed into the mixing hopper, the stirring drive motor is controlled to make the stirring shaft rotate on the sealing plate, which drives multiple stirring rods to rotate around the stirring shaft. This achieves the mixing effect of the raw materials falling into the mixing hopper and the mixing effect of the raw materials conveyed into the extrusion cylinder. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0016] Figure 2 A schematic diagram of the installation structure of the auger rod of this utility model is shown;

[0017] Figure 3 This utility model illustrates Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 A schematic diagram of the installation structure of the filter plate of this utility model is shown;

[0019] Figure 5 A schematic diagram of the installation structure of the air guide duct of this utility model is shown;

[0020] The diagram shows: 1. Machine base; 11. Extrusion cylinder; 12. Extrusion die head; 13. Extrusion screw; 14. Main drive motor; 15. Mixing hopper; 2. Feeding frame; 21. Spiral feed pipe; 211. Filter interface; 22. Screw rod; 23. Rotary shaft; 24. Crushing drive motor; 25. Sprocket drive assembly; 3. Crushing chamber; 31. Guide hopper; 32. Double roller crushing assembly; 321. Toothed crushing roller; 4. Filter chamber box; 41. Arc groove; 42. Filter plate; 43. Negative pressure fan; 5. Positioning mechanism; 51. Flange positioning ring; 511. Annular sealing groove; 512. Annular sealing gasket; 6. Air guide pipe; 61. Line cooling nozzle; 7. Sealing plate; 71. Agitator shaft; 72. Agitator rod; 73. Agitator drive motor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] As an embodiment of this utility model, in order to solve the technical problems in the background art, the following modified plastic line extrusion machine is provided:

[0023] like Figure 1 As shown, a modified plastic extrusion line is provided, including a base 1. An extrusion cylinder 11 is fixedly installed on the top of the base 1. Specifically, the extrusion cylinder 11 is provided with a heating element for heating the plastic granule raw material conveyed to it. The installation structure of the heating element is prior art and will not be described in detail here. An extrusion die 12 is fixedly installed at one end of the extrusion cylinder 11 by screws. An extrusion screw 13 is rotatably installed inside the extrusion cylinder 11. The outer side wall of the extrusion screw 13 is in contact with the inner side wall of the extrusion cylinder 11. A main drive motor 14 for driving the extrusion screw 13 to rotate is fixedly installed at the other end of the extrusion cylinder 11. The output shaft of the main drive motor 14 is coaxially fixedly connected to one end of the extrusion screw 13 extending to the outside of the extrusion cylinder 11. A mixing hopper 15 communicating with the inside of the extrusion cylinder 11 is fixedly installed at the top of the extrusion cylinder 11 and at the end away from the extrusion die 12.

[0024] There are two major problems in the current production of modified plastic extrusion: First, the crushed plastic raw materials (especially mixtures containing talc) are transported in an open manner, which makes it easy for dust and lightweight additives such as talc to be dispersed into the air. This not only pollutes the environment and reduces air quality, but also causes the actual talc content in the raw materials to be lower than the design value of the formula, resulting in insufficient product rigidity and reduced quality.

[0025] Based on this, such as Figure 2 As shown, in one embodiment of this utility model, a feeding frame 2 is fixedly installed on the top of the base 1 and on one side of the extrusion cylinder 11. A horizontal spiral feeding pipe 21 is fixedly installed on the feeding frame 2. One end of the spiral feeding pipe 21 passes through the top of the side wall of the mixing hopper 15 and is connected to the inside of the mixing hopper 15. An auger rod 22 is rotatably installed on the spiral feeding pipe 21 and inside it. The outer side wall of the auger rod 22 is in contact with the inner side wall of the spiral feeding pipe 21.

[0026] Furthermore, a crushing chamber 3 with an open top is fixedly installed on the feed frame 2 and above the spiral feed pipe 21. A guide hopper 31 is fixedly installed at the bottom of the crushing chamber 3. The bottom of the guide hopper 31 passes through the top of the spiral feed pipe 21 and is connected to the inside of the crushing chamber 3. A double roller crushing assembly 32 is installed inside the crushing chamber 3, which is used to crush the material inside the crushing chamber 3.

[0027] Furthermore, a filter interface 211 communicating with the interior is provided at the bottom of the spiral feed pipe 21 and below the guide hopper 31. A filter chamber box 4 is inserted into the filter interface 211 on the spiral feed pipe 21. The outer side wall of the filter chamber box 4 is in contact with the inner side wall of the filter interface 211. An arc-shaped groove 41 is provided at the top of the filter chamber box 4. The cross-section between the outer side wall of the auger rod 22 and the inner wall of the arc-shaped groove 41 is in contact. A positioning mechanism 5 is installed on the filter chamber box 4 to position the filter chamber box 4 and the spiral feed pipe 21. A filter plate 42 is fixedly installed in the filter chamber box 4 with screws to facilitate the installation and removal of the filter plate 42 and the filter chamber box 4. The filter plate 42 is a high-efficiency filter. The top of the filter plate 42 is arc-shaped, and the outer side wall of the auger rod 22 is in contact with the top of the filter plate 42. A negative pressure blower 43 is fixedly installed in the filter chamber box 4. The outlet of the negative pressure blower 43 is located on the side away from the spiral feed pipe 21.

[0028] Thus, with the above structure, during the modified plastic extrusion operation, after the raw material mixture is introduced into the crushing chamber 3, the material is crushed by the double-roll crushing assembly 32. The crushed material enters the spiral feeding pipe 21 through the guide hopper 31 and is then conveyed to the mixing hopper 15 by the auger rod 22. During the process, the negative pressure fan 43, in conjunction with the filter plate 42, can effectively intercept dust and talc powder, preventing them from being dispersed into the air; at the same time, the detachable design of the filter chamber box 4 facilitates cleaning and maintenance. This effectively solves the dust pollution problem generated by the crushing of plastic raw materials, reduces the loss of talc powder, and ensures the accuracy of its proportion in the raw materials.

[0029] It is understandable that the following common defects exist in the actual production of modified plastics lines: the dust filtration devices of extruders generally adopt welding fixation or complex sealing structures, which makes the maintenance of the filter unit difficult (requiring professional tools for disassembly and taking a long time) and the sealing reliability is insufficient (easy to leak air due to vibration or wear), resulting in long equipment downtime maintenance cycles and poor stability of the negative pressure system (affecting dust recovery efficiency).

[0030] Based on this, such as Figure 3 , Figure 4 As shown, in one embodiment of this utility model, the positioning mechanism 5 includes a flange positioning ring 51 fixedly sleeved on the outside of the filter chamber box 4. When the filter chamber box 4 is inserted into the filter interface 211 and the inner wall of the arc groove 41 is flush with the bottom of the inner side wall of the spiral feeding pipe 21, the flange positioning ring 51 is in contact with the bottom of the spiral feeding pipe 21. The flange positioning ring 51 is fixed to the spiral feeding pipe 21 by bolts. When the filter plate 42 needs to be replaced, the bolts used to fix the flange positioning ring 51 and the spiral feeding pipe 21 are removed, and the filter chamber box 4 can be pulled down to disassemble it. At this time, the screws used to fix the filter plate 42 and the filter chamber box 4 are removed, and the filter plate 42 can be disassembled and replaced.

[0031] Furthermore, an annular sealing groove 511 is provided on the top of the flange positioning ring 51 and outside the filter chamber box 4. An annular sealing gasket 512 is fixedly installed on the flange positioning ring 51 and inside the annular sealing groove 511. The annular sealing gasket 512 is made of rubber. When the flange positioning ring 51 is fixed to the spiral feeding pipe 21 by bolts, the annular sealing gasket 512 abuts against the bottom of the spiral feeding pipe 21, increasing the fit between the flange positioning ring 51 and the spiral feeding pipe 21 and increasing the sealing between the flange positioning ring 51 and the spiral feeding pipe 21.

[0032] like Figure 2 As shown, in one embodiment of this utility model, during the modified plastic extrusion operation, after the raw material mixture is introduced into the crushing chamber 3, in order to stably and efficiently crush the raw material, a double-roll crushing assembly 32 is further proposed, including two meshing crushing rollers 321 that are rotatably installed in the crushing chamber 3 and mesh with each other. One end of the meshing crushing rollers 321 extends to the outside of the crushing chamber 3. A horizontal rotating shaft 23 is rotatably installed on the feed frame 2. One end of the rotating shaft 23 is fixedly connected to the end of one of the meshing crushing rollers 321 through a coupling. A crushing drive motor 24 for driving the rotating shaft 23 to rotate is fixedly installed on the feed frame 2. The output shaft of the crushing drive motor 24 is coaxially fixedly connected to the rotating shaft 23. It should be noted that one end of the two meshing crushing rollers 321 extends to the outside of the crushing chamber 3, and gears are coaxially fixedly connected to both meshing crushing rollers 321.

[0033] Furthermore, the rotating shaft 23 and the auger rod 22 are connected by a sprocket drive assembly 25. Specifically, one end of the auger rod 22 extends to the outside of the spiral feeding pipe 21. The sprocket drive assembly 25 includes two sprockets, which are coaxially fixed to the end of the auger rod 22 extending to the outside of the spiral feeding pipe 21 and the rotating shaft 23, respectively. The two sprockets are connected by a chain drive. The rotation of the rotating shaft 23 drives the toothed crushing roller 321 to rotate and crush the raw material. When the auger rod 22 is driven to rotate by the sprocket drive assembly 25, the material in the spiral feeding pipe 21 is conveyed to the mixing hopper 15 through the auger rod 22. This ensures the coordination and efficiency of the crushing and conveying process.

[0034] like Figure 5As shown, in one embodiment of this utility model, a guide pipe 6 is fixedly installed on the feeding frame 2 and is fixedly connected to the bottom of the filter chamber box 4. It should be noted that the guide pipe 6 and the filter chamber box 4 are connected by a flange, and the guide pipe 6 is connected to the inside of the filter chamber box 4. The other end of the guide pipe 6 extends to the side of the extrusion die head 12 away from the extrusion cylinder 11. A line cooling nozzle 61 connected to the inside of the guide pipe 6 is opened at the bottom of the guide pipe 6 and above the extrusion die head 12. Through the design of the guide pipe 6, the negative pressure fan 43 is controlled to work. When the air in the spiral feeding pipe 21 is discharged downward through the filter interface 211, the air flows into the guide pipe 6 and is discharged downward through the line cooling nozzle 61, thereby blowing onto the line extruded through the extrusion die head 12 to achieve the pre-cooling effect of the line extruded through the extrusion die head 12.

[0035] like Figure 1 As shown, in one embodiment of this utility model, the top of the mixing hopper 15 is open. A sealing plate 7 for sealing the open end of the mixing hopper 15 is fixedly installed on the mixing hopper 15 by screws. A vertical stirring shaft 71 is rotatably installed on the sealing plate 7. The bottom of the stirring shaft 71 extends into the mixing hopper 15, and one end of the stirring shaft 71 extends into the outer wall of the mixing hopper 15. Multiple stirring rods 72 are fixedly installed along the axial direction of the stirring shaft 71. The end of the stirring rod 72 away from the stirring shaft 71 is in contact with the inner wall of the mixing hopper 15. The sealing plate... A stirring drive motor 73 is fixedly installed on the 7 to drive the stirring shaft 71 to rotate. The output shaft of the stirring drive motor 73 is coaxially fixed to the stirring shaft 71. Through the design of the stirring shaft 71 and the stirring rods 72, when the raw materials are transported into the mixing hopper 15, the stirring drive motor 73 is controlled to make the stirring shaft 71 rotate on the sealing plate 7, which drives multiple stirring rods 72 to rotate around the stirring shaft 71. Thus, the raw materials falling into the mixing hopper 15 can be stirred and mixed, and the raw materials transported into the extrusion cylinder 11 can be stirred and mixed.

[0036] Working principle and usage process of this utility model:

[0037] During the extrusion process of modified plastics, the raw material mixture is first introduced into the crushing chamber 3. At this time, the crushing drive motor 24 is turned on, driving the rotating shaft 23 to rotate, causing the meshing crushing rollers 321 to rotate. The two meshing crushing rollers 321 rotate in opposite directions and mesh, crushing the raw material mixture. The crushed raw material falls into the spiral feeding pipe 21 through the guide hopper 31. When the rotating shaft 23 rotates, it drives the auger rod 22 to rotate within the spiral feeding pipe 21 via the sprocket drive assembly 25, conveying the crushed raw material into the mixing hopper 15, and then into the extrusion cylinder 11.

[0038] Next, the main drive motor 14 and the heating elements inside the extrusion cylinder 11 are controlled to operate. The main drive motor 14 drives the extrusion screw 13 to convey the raw material towards the extrusion die 12. During the displacement of the raw material inside the extrusion cylinder 11, the heating elements heat and melt it, while the extrusion screw 13 rotates to extrude the molten raw material, causing the molten plastic granules to be extruded from the extrusion die 12 and formed into a linear shape.

[0039] Simultaneously, the negative pressure fan 43 is turned on, causing air inside the spiral feed pipe 21 to be discharged downwards through the filter port 211. External air flows in from the top of the crushing chamber 3 and is discharged downwards, creating an effect of air flowing from the crushing chamber 3 to the filter chamber box 4. During this process, dust generated from the crushing of plastic raw materials is drawn into the spiral feed pipe 21 and filtered by the filter plate 42. Dust remaining on the top of the filter plate 42 is transported to the mixing hopper 15 as the auger rod 22 rotates, preventing dust from being released into the air and reducing environmental quality and the quality of the modified plastics production line.

[0040] In addition, when the raw materials are conveyed into the mixing hopper 15, the stirring drive motor 73 is controlled to make the stirring shaft 71 rotate on the sealing plate 7, which drives multiple stirring rods 72 to rotate around the stirring shaft 71 to stir and mix the raw materials, ensuring that the raw materials conveyed into the extrusion cylinder 11 are uniform.

[0041] Finally, through the design of the air duct 6, when the negative pressure fan 43 is working, air flows into the air duct 6 and is discharged downward through the line cooling nozzle 61, blowing onto the line extruded from the extrusion die head 12 to achieve pre-cooling of the line.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A modified plastic extrusion line, characterized in that: The machine includes a base, an extrusion cylinder is fixedly installed on the top of the base, an extrusion die head is fixedly installed at one end of the extrusion cylinder by screws, an extrusion screw is rotatably installed inside the extrusion cylinder, the outer wall of the extrusion screw is in contact with the inner wall of the extrusion cylinder, a main drive motor for driving the extrusion screw to rotate is fixedly installed at the other end of the extrusion cylinder, and a mixing hopper connected to the inside of the extrusion cylinder is fixedly installed at the top of the extrusion cylinder and at the end away from the extrusion die head. A feeding frame is fixedly installed on the top of the machine base and on one side of the extrusion cylinder. A horizontal spiral feeding pipe is fixedly installed on the feeding frame. One end of the spiral feeding pipe passes through the top of the side wall of the mixing hopper and is connected to the inside of the mixing hopper. An auger rod is rotatably installed on the spiral feeding pipe and inside it. The outer side wall of the auger rod is in contact with the inner side wall of the spiral feeding pipe. A crushing chamber with an open top is fixedly installed on the feeding frame and above the spiral feeding pipe. A guide hopper is fixedly installed at the bottom of the crushing chamber. The bottom of the guide hopper passes through the top of the spiral feeding pipe and is connected to the inside of the crushing chamber. A double roller crushing assembly is installed in the crushing chamber for crushing the material in the crushing chamber. A filter interface, connected to the bottom of the spiral feeding pipe and below the guide hopper, is provided. A filter chamber is inserted into the filter interface on the spiral feeding pipe. The outer wall of the filter chamber fits against the inner wall of the filter interface. An arc-shaped groove is provided on the top of the filter chamber. The outer wall of the auger rod fits against the inner wall of the arc-shaped groove. A positioning mechanism is installed on the filter chamber to position the filter chamber relative to the spiral feeding pipe. A filter plate is fixedly installed inside the filter chamber with screws. The top of the filter plate is arc-shaped, and the outer wall of the auger rod fits against the top of the filter plate. A negative pressure blower is fixedly installed inside the filter chamber. The outlet of the negative pressure blower is located on the side away from the spiral feeding pipe.

2. The modified plastic extrusion line according to claim 1, characterized in that: The positioning mechanism includes a flange positioning ring fixedly sleeved on the outside of the filter chamber box. When the filter chamber box is inserted into the filter interface and the inner wall of the arc groove is flush with the bottom of the inner wall of the spiral feeding pipe, the flange positioning ring is in contact with the bottom of the spiral feeding pipe. The flange positioning ring is fixed to the spiral feeding pipe by bolts.

3. The modified plastic extrusion line according to claim 2, characterized in that: The flange positioning ring has an annular sealing groove on its top and outside the filter chamber. An annular sealing gasket is fixedly installed on the flange positioning ring and inside the annular sealing groove. When the flange positioning ring is fixed to the spiral feed pipe by bolts, the annular sealing gasket abuts against the bottom of the spiral feed pipe.

4. The modified plastic extrusion line according to claim 1, characterized in that: The dual-roll crushing assembly includes two meshing crushing rolls that are rotatably installed in the crushing chamber and mesh with each other. One end of the meshing crushing rolls extends to the outside of the crushing chamber. A horizontal rotating shaft is rotatably installed on the feed frame. One end of the rotating shaft is fixedly connected to the end of one of the meshing crushing rolls through a coupling. A crushing drive motor for driving the rotating shaft to rotate is fixedly installed on the feed frame.

5. The modified plastic extrusion line according to claim 4, characterized in that: The rotating shaft and the auger rod are connected by a sprocket drive assembly.

6. The modified plastic extrusion line according to claim 4, characterized in that: The feed frame is fixedly installed with an air guide pipe that is fixedly connected to the bottom of the filter chamber box. The air guide pipe is connected to the inside of the filter chamber box. The other end of the air guide pipe extends to the side above the extrusion die head away from the extrusion cylinder. A line cooling nozzle connected to the inside of the air guide pipe is opened at the bottom of the air guide pipe and above the extrusion die head.

7. The modified plastic extrusion line extruder according to claim 1, characterized in that: The top of the mixing hopper is open. A sealing plate for sealing the opening end is fixedly installed on the mixing hopper by screws. A vertical stirring shaft is rotatably installed on the sealing plate. The bottom of the stirring shaft extends into the mixing hopper, and one end of the stirring shaft extends into the outer wall of the mixing hopper. Multiple stirring rods are fixedly installed along the axis of the stirring shaft. The end of the stirring rod away from the stirring shaft is in contact with the inner wall of the mixing hopper. A stirring drive motor for driving the stirring shaft to rotate is fixedly installed on the sealing plate.

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