A material head recovery device for automobile sealing strip extrusion

Abstract

The present invention relates to the field of plastic recycling technology, and specifically to a material head recycling device for automobile sealing strip extrusion, which includes a plastic tearing device and a cleaning system used in conjunction with the same. The cleaning system includes a grinding part, a cleaning part and a dehydration part that are interconnected, and the grinding part, the cleaning part and the dehydration part are arranged in sequence, that is, the material head is first ground, and then directly enters the cleaning part along the axial direction, and is dehydrated after cleaning. Finally, the dehydrated material head directly enters the plastic tearing device for tearing and recycling; the entire system starts from a feeding barrel, passes through the grinding part, the cleaning part, the dehydration part and finally to the plastic tearing device, and all steps are closely connected, without the need for manual intervention or additional transfer, which greatly simplifies the operation process, reduces labor costs, and improves overall production efficiency, making the entire recycling process smoother and more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of plastic recycling, in particular to a slug recycling device for extruding automobile sealing strips. Background Art

[0002] Automotive plastic sealing strips are primarily used for sealing vehicle doors and windows, vehicle bodies, and engines. Materials commonly used include polyvinyl chloride (PVC), polyethylene (PE), and polypropylene (PP). These strips are typically produced through an extrusion process, which generates a certain amount of waste or scrap, such as scrap. To reduce costs and minimize environmental impact, recycling and reusing this waste is crucial.

[0003] The shredding and recycling process for plastic slugs typically requires pre-cleaning, or additional cleaning and drying steps after shredding, to ensure the material is suitable for subsequent reuse. However, the slugs after extrusion are often in a semi-molten state, easily attracting dust and impurities. Once the slugs cool and solidify, impurities firmly adhere to their surface. Simple rinsing alone is difficult to completely remove these stubborn impurities, affecting the quality and purity of the recycled material. While some equipment can pre-clean, polish, and dry the slugs, this often requires continuous transfer via conveyor lines to achieve different slug treatments, which consumes significant manpower and resources.

[0004] Based on this, the present invention discloses a slug recovery device for automobile sealing strip extrusion. Summary of the Invention

[0005] In order to solve the problems raised in the background art in the crushing and recycling process of plastic slugs, since the slugs are in a semi-molten state after extrusion and are easily adsorbed with dust and impurities, simple rinsing after cooling and solidification is difficult to completely remove, thereby affecting the quality and purity of the recycled materials, and at the same time, the existing grinding, cleaning, drying and other steps require multiple transfers and transportation to complete different steps, which affects work efficiency, the present invention provides a slug recycling device for automobile sealing strip extrusion, which includes a plastic shredding device and a cleaning system used in conjunction with the device, wherein the cleaning system includes a grinding part, a cleaning part and a dehydration part which are interconnected, and the grinding part, the cleaning part and the dehydration part are arranged in sequence;

[0006] One of the technical solutions, in order to solve the problem of solidified impurities adhering to the surface of the material head, introduced a grinding unit;

[0007] As a further improvement of the present technical solution, the grinding part includes a first rotating cylinder and a high-speed rotating grinding cylinder. The grinding cylinder is fixed in the first rotating cylinder. A first impurity chamber is formed between the grinding cylinder and the first rotating cylinder. A mounting cylinder is provided inside the grinding cylinder for reverse rotation. A grinding chamber is formed between the mounting cylinder and the first spiral pushing blade. The mounting cylinder is provided with a first spiral pushing blade. A number of steam spray holes are opened between the pitches of the first spiral pushing blade. The surface of the mounting cylinder and the inner wall of the grinding cylinder are both made of frosted material.

[0008] As a further improvement of the present technical solution, a first drive assembly is provided outside the first rotating drum, and the first drive assembly includes a first drive gear fixed on the first rotating drum and a first drive motor symmetrically arranged on both sides of the first drive gear. The first drive motor is fixed on the mounting frame, and the first drive gear is driven to rotate by the first drive motor.

[0009] In this technical solution, some impurities and debris after grinding form a sewage mixture after heat exchange with high-temperature and high-pressure steam, which needs to be discharged from the grinding chamber. After grinding away the solidified impurities, the material head can be pre-cleaned in advance.

[0010] As a further improvement of this technical solution, the grinding cylinder is evenly provided with a number of filter grooves along the axial direction, and the filter grooves are provided with filter screens; secondly, the end of the first rotating cylinder away from the cleaning part is rotatably connected to a feeding cylinder, and the feeding cylinder is communicated with the grinding chamber.

[0011] In this technical solution, due to the high-speed rotation of the grinding cylinder, in order to increase the chance of continuous friction between the material head and the surface of the mounting cylinder and the inner surface of the grinding cylinder, the material head located in each section needs to be stirred to a certain extent;

[0012] As a further improvement of the present technical solution, stirring rods are provided on both sides of the steam spray hole on the mounting cylinder.

[0013] In another technical solution, after being polished and pre-cleaned in the polishing section, the shavings are concentrated in the cleaning section for special cleaning to reduce stains and impurities on the shavings. A corresponding cleaning section is set after the polishing section.

[0014] As a further improvement of the present technical solution, the cleaning part includes a second spiral push blade coaxially connected to the first spiral push blade along the conveying direction of the first spiral push blade, and the second spiral push blade is arranged in the first filter cartridge; one end of the first filter cartridge is fixed on the mounting frame, and a water spray device with a spray length adapted to the length of the first filter cartridge is provided on the mounting frame directly above the first filter cartridge; one end of the first filter cartridge is rotatably connected to the first rotating drum, and the first filter cartridge is communicated with the grinding chamber; the other end of the first filter cartridge is rotatably connected to the dehydration part.

[0015] In order to allow the material head to be turned over and stirred as a whole while being transported in the first filter cylinder;

[0016] As a further improvement of this technical solution, the radius of the rotating rod is smaller than the radius of the mounting cylinder, the outer diameter of the second spiral pusher blade is larger than the outer diameter of the first spiral pusher blade, and the outer diameter of the second spiral pusher blade is adapted to the inner diameter of the first filter cylinder.

[0017] On this basis, since the water content of the slurry is high due to the flushing, it is necessary to dry the slurry. Therefore, a dehydration section is set up on the coaxial axis, and the slurry is directly transported to the dehydration step through the coaxial axis. As for the centrifugal dehydration method, due to the centrifugal force, the closer the slurry is to the outer layer, the better the dehydration effect is, that is, the phenomenon of dehydration stratification occurs.

[0018] As a further improvement of the present technical solution, the dehydration part includes a third spiral push blade coaxially connected to the second spiral push blade; the third spiral push blade is arranged in the second filter drum, and the second filter drum rotates at high speed through a second rotary drum sleeved outside the second filter drum, and a second drive assembly is provided outside the second rotary drum, the second drive assembly includes a second drive gear fixed on the second rotary drum, and second drive motors are symmetrically provided on both sides of the second drive gear, the second drive motor is fixed on the mounting frame, and the second drive motor drives the second drive gear to rotate; the second rotary drum is rotatably connected to the end of the first filter drum away from the first rotary drum, and the first filter drum is communicated with the second filter drum.

[0019] In order to achieve that the third spiral pushing blade can deliver the material head close to the inner wall of the second filter cylinder each time;

[0020] As a further improvement of this technical solution, the outer diameter of the second spiral push blade is adapted to the outer diameter of the third spiral push blade, the central axial direction of the third spiral push blade is set to a hollow structure, and the outer diameter of the third spiral push blade is adapted to the inner diameter of the second filter cartridge.

[0021] As a further improvement of the present technical solution, a hopper is provided at one end of the second filter cartridge away from the first filter cartridge, and the hopper is connected to the plastic shredding device.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This device, used in a slug recycling machine for automotive sealing strip extrusion, utilizes a grinding unit (including a first rotating drum, a grinding drum, and a mounting drum) to utilize high-speed rotation to rub against the inner surface of the abrasive material. Combined with high-temperature, high-pressure steam jets, it softens the slug surface, effectively grinding away adhering impurities. This solves the problem of traditional methods where simple rinsing alone fails to completely remove impurities, ensuring the purity of the recycled material. Furthermore, a filter screen effectively separates wastewater from the slug, further improving cleaning efficiency.

[0024] 2. This type of material head recovery equipment for automobile sealing strip extrusion directly enters the cleaning section (including the second spiral push blade and the first filter cartridge) after grinding, and is fully cleaned by a continuous spraying device. At the same time, the material head's activity space is increased to promote comprehensive cleaning. Compared with the existing technology of multiple transfers and conveying to complete different steps, this design reduces the number of material transfers, improves work efficiency, and also ensures the cleaning quality of the material head.

[0025] 3. This type of equipment is used in the recovery of slugs for extrusion of automotive sealing strips. It adopts a centrifugal dehydration method (third spiral push blade, second filter cartridge) and is designed to only transport the slugs close to the outer layer each time to achieve the best dehydration effect. At the same time, the inner layer slugs will automatically fill in the position due to centrifugal force, which not only improves the dehydration efficiency, but also avoids the impact of excessive water content on the subsequent shredding and recycling process, thereby ensuring the quality of the final recycled material. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural cross-sectional view of the first rotating drum of the present invention;

[0028] Figure 3 for Figure 2 A magnified view of the structure at point A;

[0029] Figure 4 It is a cross-sectional view of the structure of the grinding cylinder of the present invention;

[0030] Figure 5 for Figure 4 A magnified view of the structure at B in the middle;

[0031] Figure 6 It is a structural cross-sectional view of the first filter cartridge of the present invention;

[0032] Figure 7 for Figure 6 A magnified view of the structure at C in the middle;

[0033] Figure 8 is a structural sectional view of the second rotating drum of the present invention;

[0034] Figure 9 for Figure 8 A magnified view of the structure at D in the middle;

[0035] Figure 10 It is a structural schematic diagram of the spiral pusher blade of the present invention.

[0036] The meaning of each number in the figure is:

[0037] 1. Mounting frame; 2. First rotating drum; 3. Feeding drum; 4. First impurity chamber; 5. Grinding drum; 6. Filter tank; 7. Filter screen; 8. Mounting drum; 9. First spiral push blade; 10. Grinding chamber; 11. Steam nozzle; 12. Stirring rod; 13. Rotating rod; 14. Second spiral push blade; 15. First filter drum; 16. Second rotating drum; 17. Second filter drum; 18. Second impurity chamber; 19. Third spiral push blade; 20. Steam inlet; 21. First drive gear; 22. First drive motor; 23. Second drive gear; 24. Second drive motor; 25. Water spray device; 26. Hopper; 27. Plastic shredder. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the existing crushing and recycling process of plastic slugs, the slugs are in a semi-molten state after extrusion and are easily adsorbed by dust and impurities. Simple rinsing after cooling and solidification is difficult to completely remove, thus affecting the quality and purity of the recycled materials. At the same time, the existing grinding, cleaning, drying and other steps require multiple transfers and transportation to complete different steps, affecting work efficiency.

[0040] To this end, the present invention provides a material head recovery device for automobile sealing strip extrusion, see Figure 1-Figure 5 As shown, it includes a plastic shredding device 27 and a cleaning system used in conjunction with it. The cleaning system includes a grinding part, a cleaning part and a dehydration part that are interconnected, and the grinding part, the cleaning part and the dehydration part are arranged in sequence, that is, the material head is first ground, and then directly enters the cleaning part along the axial direction. After cleaning, it is dehydrated, and finally the dehydrated material head directly enters the plastic shredding device 27 for shredding and recycling.

[0041] Specifically, the grinding part includes a first rotating drum 2 and a high-speed rotating grinding drum 5, the grinding drum 5 is fixed in the first rotating drum 2, a first impurity chamber 4 is formed between the grinding drum 5 and the first rotating drum 2, a mounting drum 8 is provided inside the grinding drum 5 for reverse rotation, a grinding chamber 10 is formed between the mounting drum 8 and the first spiral pushing blade 9, the mounting drum 8 is provided with a first spiral pushing blade 9, a plurality of steam spray holes 11 are opened between the pitches of the first spiral pushing blade 9, stirring rods 12 are provided on both sides of the steam spray holes 11 on the mounting drum 8, and the surface of the mounting drum 8 and the inner wall of the grinding drum 5 are both made of frosted material.

[0042] If the first rotating drum 2 is required to drive the grinding drum 5 to rotate at high speed, a first driving assembly is provided outside the first rotating drum 2. The first driving assembly includes a first driving gear 21 fixed on the first rotating drum 2 and a first driving motor 22 symmetrically arranged on both sides of the first driving gear 21. The first driving motor 22 is fixed on the mounting frame 1, and the first driving gear 21 is driven to rotate by the first driving motor 22.

[0043] In addition, some impurities and debris after grinding form a sewage mixture after heat exchange with high-temperature and high-pressure steam, which needs to be discharged from the grinding chamber 10. After the solidified impurities are ground off, the material head is pre-cleaned in advance. Therefore, the grinding cylinder 5 is evenly provided with a number of filter grooves 6 along the axial direction, and the filter grooves 6 are provided with filter screens 7; secondly, the end of the first rotating cylinder 2 away from the cleaning part is rotatably connected to the feeding cylinder 3, and the feeding cylinder 3 is communicated with the grinding chamber 10.

[0044] During operation, the material head is directly poured into the feeding barrel 3, and then the mounting barrel 8 is driven to rotate by the rotating rod 13 coaxially connected thereto, and the rotation of the rotating rod 13 is driven to rotate by the corresponding driving device, and the mounting barrel 8 rotates through the first spiral pushing blade 9 thereon to send the material head into the grinding chamber 10, and the grinding chamber 10 is divided into several sections by the first spiral pushing blade 9 set on the mounting barrel 8, and each section is correspondingly provided with a steam nozzle 11, so that when the material head gradually enters the next section step by step, it will be heated and softened by the steam nozzle 11, and the high-temperature and high-pressure steam ejected by the steam nozzle 11 The steam is supplied through a steam inlet 20 opened on one side of the rotating rod 13; it should be noted that the grinding part is aimed at amorphous plastics such as PS and PC, and has a better softening effect on this part of plastics; specifically, since a number of intervals are formed between the first spiral pushing blade 9 and the inner wall of the grinding cylinder 5, each interval will form an approximately closed space under the high-speed rotation of the grinding cylinder 5, and these high-temperature and high-pressure steams will act on the material head, exchange heat with the material head, and soften the surface of the material head. The softened material head then passes through the high-speed rotation of the grinding cylinder 5, so that the material head and the surface of the mounting cylinder 8 and the inner surface of the grinding cylinder 5 are continuously rubbed to grind off impurities.

[0045] It should be noted that, due to the high-speed rotation of the grinding cylinder 5, in order to increase the chance of continuous friction between the material head and the surface of the mounting cylinder 8 and the inner surface of the grinding cylinder 5, the material head located in each interval needs to be stirred to a certain extent. Because the high-speed rotation of the grinding cylinder 5 will cause the material head to also have a certain centrifugal force, the material head will tend to stick to the inner wall of the grinding cylinder 5, which is not conducive to grinding. Therefore, the setting of the stirring rod 12 enables the grinding cylinder 5 to drive the material head to rotate at high speed for grinding, which can play a stirring role and increase the grinding effect.

[0046] Secondly, the rotation speed of the mounting cylinder 8 is much different from that of the grinding cylinder 5. The rotation of the mounting cylinder 8 drives the first spiral pushing blade 9 to transport the material head step by step. In the process of step-by-step transportation in the grinding chamber 10, the grinding effect of the material head is continuously increased, and the problem of uneven grinding caused by traditional single-interval grinding is further solved; in addition, the material head and the steam ejected from the steam nozzle 11 will form liquid water after heat exchange, and then mix with the impurities ground down to form sewage. This sewage needs to be discharged to avoid contamination of the material head. With the help of the high-speed rotating grinding cylinder 5, the separation of the material head and the sewage can be achieved, because the sewage carrying impurities will flow directly out of the filter screen 7 through centrifugal force, filtering the material head into the grinding chamber 10, and the sewage and impurities will enter the first impurity chamber 4 through the filter screen 7, and then be directly discharged through the corresponding drainage device or drain pipe. Therefore, the grinding, pre-cleaning, and separation of the material head are realized in the grinding part.

[0047] For further information, see Figure 6 and Figure 7 As shown, after being polished and pre-cleaned in the polishing section, the material heads are concentratedly sent to the cleaning section for special cleaning to reduce stains and impurities on the material heads; therefore, a corresponding cleaning section is set after the polishing section, and the cleaning section includes a second spiral push blade 14 coaxially connected to the first spiral push blade 9 along the conveying direction of the first spiral push blade 9, and the second spiral push blade 14 is arranged in the first filter cartridge 15; one end of the first filter cartridge 15 is fixed on the mounting frame 1, and a water spray device 25 with a spray length adapted to the length of the first filter cartridge 15 is provided on the mounting frame 1 directly above the first filter cartridge 15; one end of the first filter cartridge 15 is rotatably connected to the first rotating drum 2, and the first filter cartridge 15 is connected to the polishing chamber 10; the other end of the first filter cartridge 15 is rotatably connected to the dehydration section; secondly, the radius of the rotating rod 13 is smaller than the radius of the mounting drum 8, the outer diameter of the second spiral push blade 14 is larger than the outer diameter of the first spiral push blade 9, and the outer diameter of the second spiral push blade 14 is adapted to the inner diameter of the first filter cartridge 15.

[0048] During operation, the polished material head is pushed step by step by the first spiral pushing blade 9 and finally enters the first filter cylinder 15. Since the radius of the rotating rod 13 is smaller than the radius of the installation cylinder 8, and the outer diameter of the second spiral pushing blade 14 is larger than the outer diameter of the first spiral pushing blade 9, when the material head enters each interval in the first filter cylinder 15, the activity space of the material head is increased. Figure 5 and Figure 7 By comparison, it can be seen that the grinding chamber 10 has a smaller movable space in order to increase the contact opportunity between the material head and the surface of the frosted material and improve the grinding effect. The first filter barrel 15 provides a larger movable space through the larger second spiral pushing blade 14 and the smaller rotating rod 13, so that the material head can be turned over and stirred as a whole while being transported in the first filter barrel 15. Combined with the continuous spraying on the first filter barrel 15, the excess impurities in the material head can be directly cleaned after passing through the first filter barrel 15.

[0049] For further information, see Figure 1 、 Figure 8 and Figure 10 As shown, the material heads after uniform flushing can basically guarantee a certain degree of cleanliness, and then they need to be shredded for subsequent recycling. However, due to the high water content of the material heads caused by flushing, it is not conducive to subsequent shredding and recycling, and the material heads need to be dried. The present invention adopts a coaxial conveying method and a centrifugal dehydration method to achieve the drying of the material heads. As for the centrifugal dehydration method, due to the centrifugal force, the closer the material heads are to the outer layer, the better the dehydration effect, that is, the phenomenon of dehydration stratification occurs; therefore, for the device that uses this method to dehydrate, in order to improve the dehydration effect and meet the continuous supply demand of the front-end cleaning part, each spiral conveying only transports the material heads close to the outer layer in the dehydration part, and the material heads close to the inner layer will gradually approach and replace the outer layer through centrifugal force. Therefore, the dehydration effect can be improved, so that the material heads conveyed out of the dehydration part each time are the material heads closest to the outer layer;

[0050] Specifically, the dehydration part includes a third spiral push blade 19 coaxially connected to the second spiral push blade 14; the third spiral push blade 19 is arranged in the second filter drum 17, and the second filter drum 17 is rotated at a high speed by the second drum 16 sleeved outside the second filter drum 17, and a second drive assembly is provided outside the second drum 16, and the second drive assembly includes a second drive gear 23 fixed on the second drum 16, and the second drive motor 24 is symmetrically provided on both sides of the second drive gear 23. The second drive motor 24 is fixed on the mounting frame 1, and the second drive motor 24 drives the second drive gear 23 to rotate; the second drum 16 is rotatably connected to the end of the first filter drum 15 away from the first drum 2, and the first filter drum 15 is connected to the second filter drum 17;

[0051] In order to achieve the corresponding realization that each time the third spiral pushing blade 19 conveys the material head close to the inner wall of the second filter cylinder 17, that is, the material head close to the outer layer, the outer diameter of the second spiral pushing blade 14 is adapted to the outer diameter of the third spiral pushing blade 19, and the central axial direction of the third spiral pushing blade 19 is set to a hollow structure, and the outer diameter of the third spiral pushing blade 19 is adapted to the inner diameter of the second filter cylinder 17; it can be seen from this that the hollow structural feature of the third spiral pushing blade 19 enables the third spiral pushing blade 19 to spirally convey the part of the material head that is in contact with the inner wall of the second filter cylinder 17, and when that part of the material head is conveyed out, due to The centrifugal force generated by the high-speed rotation of the second filter drum 17 will cause the inner material head to fill its position and become a new outer layer. This continues, further improving the dehydration effect of the material head. After high-speed rotation, the water on the material head will pass through the second filter drum 17 into the second impurity chamber 18 between the second rotating drum 16 and the second filter drum 17. Thereafter, the water in the second impurity chamber 18 will be discharged uniformly by the corresponding drain pipe or drainage device. In addition to achieving dehydration, this dehydration section also serves as a guarantee for the subsequent impurity separation, because the second filter drum 17 drives the material head to rotate at high speed, and at the same time, under the action of centrifugal force, it can also achieve the separation of uncleaned impurities and water.

[0052] Finally, a hopper 26 is provided at one end of the second filter cartridge 17 away from the first filter cartridge 15, and the hopper 26 is connected to the plastic shredding device 27. That is to say, the part of the material head that has completed dehydration and is close to the inner wall of the second filter cartridge 17 is transported by the third spiral pushing blade 19 and finally enters the plastic shredding device 27 to complete shredding and recycling.

[0053] To sum up, through the design scheme that integrates the four main steps of grinding, cleaning, dehydration and shredding into one, especially the seamless connection between the grinding part (first rotating drum 2, grinding drum 5), the cleaning part (first filter drum 15, second spiral push blade 14), the dehydration part (second filter drum 17, third spiral push blade 19) and the plastic shredding device 27, the overall operation realizes one-stop processing from raw material input to finished product output, greatly improving resource recycling rate and production efficiency; thereby effectively solving the existing problem in the crushing and recycling process of plastic material heads, that is, since the material heads are in a semi-molten state after extrusion and are easily adsorbed with dust and impurities, simple rinsing after cooling and solidification is difficult to completely remove them, thereby affecting the quality and purity of the recycled materials, and at the same time, the existing grinding, cleaning, drying and other steps require multiple transfers and transportation to complete different steps, affecting work efficiency.

[0054] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A slug recovery device for automobile sealing strip extrusion, characterized by: It comprises a plastic shredding device (27) and a cleaning system used in conjunction with the device, wherein the cleaning system comprises a polishing part, a cleaning part and a dehydration part which are interconnected; The grinding part includes a high-speed rotating grinding cylinder (5), a mounting cylinder (8) is provided inside the grinding cylinder (5) for counter-rotation, a grinding chamber (10) is formed between the mounting cylinder (8) and the first spiral pushing blade (9), the mounting cylinder (8) is provided with the first spiral pushing blade (9), a plurality of steam spray holes (11) are provided between the pitches of the first spiral pushing blade (9), stirring rods (12) are provided on both sides of the steam spray holes (11) on the mounting cylinder (8), and the surface of the mounting cylinder (8) and the inner wall of the grinding cylinder (5) are both made of frosted material; The grinding cylinder (5) is provided with a plurality of filter grooves (6) uniformly extending along the axial direction, and the filter grooves (6) are provided with filter screens (7); The cleaning portion comprises a second spiral pushing blade (14) coaxially connected to the first spiral pushing blade (9) along the conveying direction of the first spiral pushing blade (9), and the second spiral pushing blade (14) is arranged in the first filter cartridge (15); The dehydration section includes a third spiral push blade (19) coaxially connected to the second spiral push blade (14), the third spiral push blade (19) being arranged in the second filter cylinder (17), and the second filter cylinder (17) is rotated at high speed by a second rotating cylinder (16) sleeved outside the second filter cylinder (17); The grinding section further comprises a first rotating cylinder (2), the grinding cylinder (5) being fixedly arranged in the first rotating cylinder (2), and a first impurity chamber (4) being formed between the grinding cylinder (5) and the first rotating cylinder (2); One end of the first filter cartridge (15) is fixed on the mounting frame (1), and a water spray device (25) having a spray length adapted to the length of the first filter cartridge (15) is provided on the mounting frame (1) directly above the first filter cartridge (15); One end of the first filter cylinder (15) is rotatably connected to the first rotating cylinder (2), and the first filter cylinder (15) is in communication with the grinding chamber (10); The other end of the first filter cartridge (15) is rotatably connected to the second rotating cartridge (16), and the first filter cartridge (15) is in communication with the second filter cartridge (17); The outer diameter of the second spiral push blade (14) is adapted to the outer diameter of the third spiral push blade (19); the central axial direction of the third spiral push blade (19) is configured as a hollow structure; and the outer diameter of the third spiral push blade (19) is adapted to the inner diameter of the second filter cartridge (17).

2. The slug recovery device for automobile sealing strip extrusion according to claim 1, characterized in that: A first driving assembly is provided outside the first rotating drum (2), the first driving assembly comprising a first driving gear (21) fixed on the first rotating drum (2) and a first driving motor (22) symmetrically arranged on both sides of the first driving gear (21), the first driving motor (22) being fixed on the mounting frame (1), and the first driving gear (21) being driven to rotate by the first driving motor (22).

3. The slug recovery device for automobile sealing strip extrusion according to claim 1, characterized in that: The mounting cylinder (8), the first spiral push blade (9), the second spiral push blade (14), and the third spiral push blade (19) are all connected by rotating a rotating rod (13) connected to the mounting frame (1), and the mounting cylinder (8), the first spiral push blade (9), the second spiral push blade (14), and the third spiral push blade (19) are coaxially arranged with the rotating rod (13).

4. The slug recovery device for automobile sealing strip extrusion according to claim 3, characterized in that: A steam inlet (20) is provided on one end of the rotating rod (13) adjacent to the first rotating drum (2), the steam inlet being connected to a plurality of steam spray holes (11) in the mounting drum (8).

5. The slug recovery device for automobile sealing strip extrusion according to claim 3, characterized in that: One end of the first rotating drum (2) away from the first filter drum (15) is rotatably connected to a feeding drum (3), and the feeding drum (3) is communicated with the grinding chamber (10).

6. The slug recovery device for automobile sealing strip extrusion according to claim 3, characterized in that: The radius of the rotating rod (13) is smaller than the radius of the mounting cylinder (8), the outer diameter of the second spiral pushing blade (14) is larger than the outer diameter of the first spiral pushing blade (9), and the outer diameter of the second spiral pushing blade (14) is adapted to the inner diameter of the first filter cylinder (15).

7. The slug recovery device for automobile sealing strip extrusion according to claim 1, characterized in that: A second driving assembly is provided outside the second rotating drum (16), and the second driving assembly includes a second driving gear (23) fixed on the second rotating drum (16). Second driving motors (24) are symmetrically provided on both sides of the second driving gear (23). The second driving motor (24) is fixed on the mounting frame (1), and the second driving motor (24) drives the second driving gear (23) to rotate.

8. The slug recovery device for automobile sealing strip extrusion according to claim 1, characterized in that: A hopper (26) is provided at one end of the second filter cartridge (17) away from the first filter cartridge (15), and the hopper (26) is in communication with the plastic shredding device (27).

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