Crushing device for plastic processing

Abstract

The invention belongs to the technical field of plastic processing, and particularly relates to a crushing device for plastic processing, which comprises a supporting assembly, a crushing assembly for crushing plastic is mounted on the supporting assembly, a feed hopper is mounted at the top of the crushing assembly, and guide plates are fixedly connected to the inner walls of the two opposite sides of the feed hopper. A discharging gap is reserved between the bottom ends of the two material guiding plates, rotating plates are arranged below the two material guiding plates, and when plastic is poured into the smashing box through the feeding hopper, the air cylinder is started to be matched with the piston rod to repeatedly push and pull the connecting base, so that the two rotating plates rotate in a reciprocating mode, and the width of the discharging gap formed between the two material guiding plates is adjusted; plastic can be evenly discharged in the length direction of the feeding hopper, the problem that the smashing disc is easily blocked by the accumulated plastic due to plastic accumulation is avoided, and the problem that the plastic cannot be discharged due to the fact that the materials are blocked when penetrating through the discharging gap can be avoided as much as possible due to the fact that the widths of the two ends of the discharging gap are always in a reciprocating change state.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plastic processing, and particularly relates to a crushing device for plastic processing. BACKGROUND

[0002] Plastic is an important organic synthetic polymer material and is widely used. Since plastic cannot be naturally degraded, direct disposal will pollute the environment, so it is necessary to classify and recycle waste plastic. After waste plastic is processed into particles by a crushing device, the regenerated particles can be used in daily life, clothing industry, building materials, chemical industry, agriculture and the like through film blowing, wire drawing, pipe drawing, injection molding and extrusion profile technology, which is of great significance to environmental protection.

[0003] At present, plastic is crushed by a plastic crusher after being recycled. In use, the existing plastic crusher directly pours waste plastic into a hopper, and then pours the waste plastic into a crushing chamber for crushing. Since plastic is elastic, the plastic is likely to support each other to form a blockage after being poured into the hopper due to rapid falling, which affects the discharging of the upper layer of plastic. Meanwhile, the hopper lacks a uniform distribution structure, which may cause a large amount of plastic to accumulate in some positions of the crushing chamber, so that the crushing blade is likely to be stuck during the crushing process, which is inconvenient for users to use. SUMMARY

[0004] The application aims to provide a plastic processing crushing device with simple structure and reasonable design to solve the above problems.

[0005] The application achieves the above-mentioned purposes through the following technical solutions: A plastic processing crushing device, comprising a support assembly, a crushing assembly is installed on the support assembly, a feeding hopper is installed on the top of the crushing assembly, guide plates are fixedly connected to the inner walls on both sides of the feeding hopper, a discharging gap is left between the bottom ends of the two guide plates, turning plates are arranged below the two guide plates, a connecting shaft is fixedly penetrated through the middle section of the turning plate, the connecting shaft is rotatably connected to the bottom wall of the guide plate at the top end, a protective cover is fixedly penetrated through the feeding hopper, a cylinder is installed on the outer end side wall of the protective cover, a piston rod is installed on the output end of the cylinder, the piston rod extends through the end side wall of the protective cover into the feeding hopper, a connecting seat is fixedly connected to one end of the piston rod, adjusting rods are rotatably connected to both sides of the connecting seat, the ends of the two adjusting rods away from the connecting seat are rotatably connected to the end portions of the two turning plates, a discharging assembly is connected to the bottom of the crushing assembly, and a secondary crushing and feeding structure is installed on the support assembly on one side of the discharging assembly.

[0006] As a further optimization scheme of the application, the support assembly comprises a bottom support, a support table is fixedly connected to the upper surface of one end of the bottom support, an upper support is fixedly connected to the top of the other end of the bottom support, and a side support is welded and fixed to the side wall on one side of the upper support.

[0007] As a further optimization scheme of the present application, the crushing assembly comprises a crushing box fixedly installed inside the upper support, two transmission shafts are rotationally connected in the crushing box, a set of crushing discs are sleeved on the two transmission shafts, the two sets of crushing discs are arranged in a staggered manner, blades are integrally formed on the circumferential sides of the two sets of crushing discs, and adjacent two crushing discs in each set are separated by a separation disc sleeved on the transmission shaft.

[0008] As a further optimization scheme of the present application, the top of the side support is fixedly connected with a reduction gear box, a set of reduction gears are arranged in the reduction gear box, the output end of the reduction gear box is fixedly connected with one end of one of the transmission shafts, a first motor is fixedly installed on the outer wall of one side of the reduction gear box, the output end of the first motor is fixedly connected with the input end of the reduction gear box, gears are fixedly connected with the ends of the two transmission shafts away from the reduction gear box, and the two gears are in mesh with each other.

[0009] As a further optimization scheme of the present application, the crushing box is provided with inclined plates on the inner walls of the two sides in the axial direction of the transmission shaft, the two ends of the inclined plates are fixed to the inner walls of the crushing box through lugs, the bottom ends of the inclined plates are fixedly connected with cooling boxes, the side of the cooling box close to the transmission shaft is fixedly connected with a hollow scraper, the width of the hollow scraper is set according to the spacing between adjacent two crushing discs, and the free end of the hollow scraper extends into the gap between adjacent two crushing discs.

[0010] As a further optimization scheme of the present application, the discharging assembly comprises a discharging hopper arranged at the bottom of the crushing box, the outer side wall of the discharging hopper is fixedly connected with the upper support, a discharging port is formed in the bottom of the discharging hopper, a downwardly inclined guide plate is fixedly installed on the inner wall of one side of the top of the discharging hopper, a filter plate is arranged below the guide plate and fixedly connected with the inner wall of the discharging hopper, the filter plate is arranged in an inclined manner, a collecting box is communicatively arranged in the side wall of the discharging hopper at the end of the filter plate with a lower height, and the bottom end of the collecting box is fixedly connected with a lower discharging pipe.

[0011] As a further optimization scheme of the present application, the secondary crushing and conveying structure comprises a conveying pipe arranged above the support table, the bottom end of the conveying pipe is fixedly connected with the support table through a pipe seat, a sealing cover is fixedly sleeved on the top end of the conveying pipe, a screw conveyor is arranged in the conveying pipe, the two ends of the screw conveyor are rotationally connected with the pipe seat and the sealing cover respectively, a second motor for driving the screw conveyor to rotate is fixedly installed on the bottom wall of the support table, a downwardly inclined upper discharging pipe is communicatively arranged on the side of the sealing cover close to the feeding hopper, and one end of the upper discharging pipe away from the sealing cover extends through the side wall of the feeding hopper into the feeding hopper.

[0012] As a further optimization scheme of the present application, a support ring is sleeved on the middle segment of the conveying pipe, a plurality of annularly distributed screw rods are screwed on the circumferential side of the support ring, one end of the screw rod located in the support ring abuts against the outer wall of the conveying pipe, and a fixing frame fixedly connected with the side wall of the upper support is arranged on the side of the support ring close to the upper support.

[0013] As a further optimization scheme of the present application, the upper discharge pipe is rotatably connected to a return pipe at one end in the feed hopper through a rotary joint, the upper surface of the return pipe is fixedly connected to a guide rod, the bottom end of one of the connecting shafts extends downward and is fixedly connected to a push plate, a waist-shaped hole is formed in the push plate, and the push plate is sleeved on the guide rod through the waist-shaped hole and is in sliding connection with the guide rod.

[0014] The present application has the following beneficial effects: 1. When the plastic is poured into the crushing box through the feed hopper, the cylinder is started to repeatedly push and pull the connecting seat in cooperation with the piston rod, so that the two rotating plates reciprocate to adjust the width of the discharging gap formed between the two guide plates, so that the plastic can be uniformly discharged along the length direction of the feed hopper, which not only avoids the problem that the plastic is accumulated and easily causes the crushing disc to be jammed by the accumulated plastic, but also avoids the problem that the material is jammed when passing through the discharging gap, causing the plastic to be unable to be discharged.

[0015] 2. The cooling boxes filled with cooling liquid are installed on the inner walls of both sides of the crushing box, the hollow scraper for cleaning the blades is installed on the side wall of the cooling box, and the internal cavity of the hollow scraper is in communication with the cooling box, so that the cooling liquid in the cooling box can enter the hollow scraper to cool the hollow scraper, and when the blades rotate to be attached to the hollow scraper, the hollow scraper can also exchange heat with the cooling liquid to avoid the temperature of the blades being too high due to long-time extrusion and friction, thereby reducing the adhesion of the plastic on the blades.

[0016] 3. When the plastic that does not meet the standard is transported back into the feed hopper through the return pipe, the cylinder is started to repeatedly push and pull the connecting seat in cooperation with the piston rod, so that the two rotating plates reciprocate, and at this time, the connecting shaft drives the push plate to rotate, and the waist-shaped hole formed in the push plate drives the return pipe to rotate around the rotary joint, so that the plastic that needs to be crushed again is uniformly poured into the crushing box, thereby further avoiding the problem that the plastic is accumulated to cause the crushing disc to be jammed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of one side of the whole application; Figure 2 is a structural schematic view of the other side of the whole application; Figure 3 is a sectional structural schematic view of the present application; Figure 1 Figure 4 is a connecting structure schematic view of the guide plate and the rotating plate of the present application; Figure 5 is a bottom structural schematic view of the present application; Figure 4 Figure 6 ​​is the connection structure schematic diagram of the first motor, the crushing box and the crushing disc of the present application; Figure 7 is the installation position schematic diagram of the partition disc of the present application; Figure 8 is the connection structure schematic diagram of the inclined plate, the cooling box and the hollow scraper of the present application; Figure 9 is the installation position schematic diagram of the lower hopper and the conveying pipe of the present application; Figure 10 is the cross-sectional structure schematic diagram of the present application Figure 9 ; Figure 11 is the installation position schematic diagram of the sealing cover, the return pipe, the guide rod and the rotating plate of the present application.

[0018] In the figure: 101, bottom support; 102, support table; 103, upper support; 104, side support; 201, crushing box; 202, reduction gear box; 203, first motor; 204, transmission shaft; 205, gear; 206, crushing disc; 207, blade; 208, partition disc; 301, inclined plate; 302, ear plate; 303, cooling box; 304, hollow scraper; 401, feeding hopper; 402, guide plate; 403, rotating plate; 404, connecting shaft; 405, connecting seat; 406, adjusting rod; 407, protective cover; 408, air cylinder; 409, piston rod; 501, lower hopper; 502, discharge port; 503, guide plate; 504, filter plate; 505, collection box; 506, lower discharge pipe; 601, pipe seat; 602, conveying pipe; 603, sealing cover; 604, support ring; 605, auger; 606, second motor; 607, upper discharge pipe; 701, rotary joint; 702, return pipe; 703, guide rod; 704, push plate; 705, waist-shaped hole. DETAILED DESCRIPTION

[0019] It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0020] EMBODIMENT As shown in Figure 1 - Figure 2 A crushing device for plastic processing, comprising a bottom support 101, one end of the bottom support 101 is fixedly connected with a support table 102 on the upper surface, and the other end of the bottom support 101 is fixedly connected with an upper support 103 on the top, the upper support 103 is internally provided with a crushing box 201 for crushing plastic, and the bottom of the crushing box 201 is provided in an open manner.

[0021] As shown inFigure 6 As shown in Figure 7 Two transmission shafts 204 are rotatably connected in the crushing box 201, a set of crushing discs 206 is sleeved on each transmission shaft 204, the two sets of crushing discs 206 are arranged in a staggered manner, and blades 207 are integrally formed on the circumferential side of each set of crushing discs 206. Adjacent two crushing discs 206 in each set are separated by a separation disc 208 sleeved on the transmission shaft 204. A side support 104 is welded and fixed on one side wall of the upper support 103, a reduction gear box 202 is fixedly connected to the top of the side support 104, a reduction gear set is arranged in the reduction gear box 202, the output end of the reduction gear box 202 is fixedly connected with the end of one of the transmission shafts 204, and a first motor 203 is fixedly installed on the outer wall of one side of the reduction gear box 202. The output end of the first motor 203 is fixedly connected with the input end of the reduction gear box 202. The reduction gear box 202 and the reduction gear set are arranged to improve the torque of the first motor 203, which facilitates subsequent crushing of the plastic. The ends of the two transmission shafts 204 away from the reduction gear box 202 are fixedly connected with gears 205, the two gears 205 are meshed with each other, when the plastic is poured into the crushing box 201, the first motor 203 drives the crushing disc 206 mounted on one of the transmission shafts 204 to rotate in cooperation with the reduction gear set mounted in the reduction gear box 202, and under the transmission action of the gear 205, the crushing disc 206 mounted on the other transmission shaft 204 is driven to rotate in the opposite direction. Since the blades 207 are integrally formed on the two sets of crushing discs 206, the blades 207 can be sheared by rotating towards each other to realize rapid crushing of the plastic.

[0022] As shown in Figure 6 And Figure 8 The inner walls of the crushing boxes 201 on the two axial sides of the transmission shaft 204 are provided with inclined plates 301, the two ends of the inclined plate 301 are fixed to the inner walls of the crushing boxes 201 through the cooperation of the ear plates 302 and external bolts, the bottom end of the inclined plate 301 is fixedly connected with a cooling box 303, the cooling box 303 contains cooling liquid, and the side of the cooling box 303 close to the transmission shaft 204 is fixedly connected with a hollow scraper 304. The internal cavity of the hollow scraper 304 is in communication with the cooling box 303, so that the cooling liquid in the cooling box 303 can enter the hollow scraper 304 to cool the hollow scraper 304; The width of the hollow scraper 304 is set according to the spacing between two adjacent crushing discs 206, and the free end of the hollow scraper 304 extends into the gap between the two adjacent crushing discs 206. During the crushing process of the plastic, part of the plastic adhering to the blade 207 can be scraped off by the hollow scraper 304. At the same time, when the blade 207 is rotated to be in contact with the hollow scraper 304, the blade 207 can exchange heat with the cooling liquid through the hollow scraper 304, so as to avoid the problem that the plastic is easily adhered to the blade 207 due to the high temperature of the blade 207 caused by long-time extrusion and friction.

[0023] As shown in Figure 2 - Figure 5 The upper support 103 above the crushing box 201 is fixedly provided with a feeding hopper 401. The feeding hopper 401 is fixedly connected with guide plates 402 on the inner walls of the opposite sides. The bottom ends of the two guide plates 402 are provided with a discharging gap, so that the plastic can fall through the discharging gap. The lower part of each guide plate 402 is provided with a rotating plate 403. The middle part of the rotating plate 403 is fixedly provided with a connecting shaft 404. The top end of the connecting shaft 404 is rotatably connected with the bottom wall of the guide plate 402, so that the rotating plate 403 can rotate through the connecting shaft 404. The feeding hopper 401 at one end of the rotating plate 403 is fixedly provided with a protective cover 407. The outer end of the protective cover 407 is provided with a pneumatic cylinder 408. The output end of the pneumatic cylinder 408 is provided with a piston rod 409. The piston rod 409 extends into the feeding hopper 401 through the end wall of the protective cover 407. The end of the piston rod 409 away from the pneumatic cylinder 408 is fixedly connected with a connecting seat 405. The two sides of the connecting seat 405 are rotatably connected with adjusting rods 406. The ends of the two adjusting rods 406 away from the connecting seat 405 are rotatably connected with the bottom walls of the ends of the two rotating plates 403. When the pneumatic cylinder 408 drives the piston rod 409 to retract, the connecting seat 405 slides into the protective cover 407, and the two rotating plates 403 at one end close to the protective cover 407 rotate around the connecting shaft 404 through the adjusting rods 406 on the two sides of the connecting seat 405. When the pneumatic cylinder 408 drives the piston rod 409 to extend, the connecting seat 405 slides in the opposite direction, and the two rotating plates 403 at one end close to the protective cover 407 rotate in the opposite direction around the connecting shaft 404 through the adjusting rods 406 on the two sides of the connecting seat 405. The pneumatic cylinder 408 cooperates with the piston rod 409 to repeatedly push and pull the connecting seat 405, so that the two rotating plates 403 rotate reciprocatingly, so as to adjust the width of the discharging gap between the two guide plates 402, so that the plastic can be uniformly discharged along the length direction of the feeding hopper 401, and the problem that the crushing disc 206 is easily jammed by the accumulated plastic is avoided.

[0024] As shown in Figure 2 and Figure 9 - Figure 10As shown, the bottom of the crushing box 201 is provided with a lower hopper 501, the outer wall of the lower hopper 501 is fixedly connected with the upper support 103, a discharge port 502 is left on the bottom of the lower hopper 501, a downwardly inclined guide plate 503 is fixedly installed on the inner wall of one side of the top of the lower hopper 501, a filter plate 504 is arranged below the guide plate 503 and fixedly connected with the inner wall of the lower hopper 501, the filter plate 504 is arranged obliquely, the plastic discharged from the bottom of the crushing box 201 is conveyed to above the end of the filter plate 504 with higher height along the guide plate 503, so that the plastic slides down along the filter plate 504, and during the sliding process, the plastic with standard crushing diameter can pass through the filter plate 504 and be discharged through the discharge port 502 left on the bottom end of the lower hopper 501; A collecting box 505 is communicatively arranged on the sidewall of the lower hopper 501 at the end of the filter plate 504 with lower height, the bottom end of the collecting box 505 is fixedly connected with a lower discharge pipe 506, and the plastic that cannot be completely crushed is blocked by the filter plate 504, slides down along the upper surface of the filter plate 504 into the collecting box 505, and finally enters the lower discharge pipe 506 connected with the bottom end of the collecting box 505.

[0025] As shown in the figure, Figure 1 and Figure 9 - Figure 10 As shown, the support table 102 is provided with a feeding pipe 602 above, the bottom end of the feeding pipe 602 is fixedly connected with the support table 102 through a pipe seat 601, a sealing cover 603 is fixedly sleeved on the top end of the feeding pipe 602, a support ring 604 is sleeved on the middle segment of the feeding pipe 602, a plurality of annularly distributed screw rods are screwed on the circumferential side of the support ring 604, one end of the screw rod located in the support ring 604 abuts against the outer wall of the feeding pipe 602, and the side of the support ring 604 close to the upper support 103 is provided with a fixed frame fixedly connected with the sidewall of the upper support 103, the middle segment of the feeding pipe 602 is supported by the support ring 604 cooperating with the screw rod and the fixed frame, which greatly improves the stability of the installation of the feeding pipe 602; A auger 605 is arranged inside the feeding pipe 602, the two ends of the auger 605 are rotatably connected with the pipe seat 601 and the sealing cover 603 respectively, a second motor 606 is fixedly installed on the bottom wall of the support table 102, the output end of the second motor 606 is rotatably penetrated through the support table 102 and the pipe seat 601 and fixedly connected with the bottom end of the auger 605, the bottom end of the lower discharge pipe 506 is penetrated through the bottom wall of the feeding pipe 602 and communicates with the inside of the feeding pipe 602, so that the plastic with non-standard crushing diameter can be conveyed into the feeding pipe 602 along the lower discharge pipe 506, at this time, the second motor 606 is started to drive the auger 605 to rotate, and the plastic with non-standard crushing diameter is conveyed upward in cooperation with the feeding pipe 602; The upper discharging pipe 607 inclined downward is arranged in communication with one side of the feeding hopper 401 close to the sealing cover 603, and the end of the upper discharging pipe 607 away from the sealing cover 603 extends through the sidewall of the feeding hopper 401 into the feeding hopper 401. Since the upper discharging pipe 607 is arranged in an inclined downward manner, when the plastic with a crushing diameter that does not meet the standard is conveyed into the sealing cover 603 by the auger 605, the plastic can be conveyed into the feeding hopper 401 again through the upper discharging pipe 607 and then falls into the crushing box 201 below for repeated crushing, which is convenient for users to use.

[0026] As shown in Figure 5 and Figure 11 The end of the upper discharging pipe 607 located in the feeding hopper 401 is rotatably connected with the return pipe 702 through the rotary joint 701, the upper surface of the return pipe 702 is fixedly connected with the guide rod 703, the bottom end of one of the connecting shafts 404 extends downward and is fixedly connected with the push plate 704, the waist-shaped hole 705 is formed in the push plate 704, the push plate 704 is sleeved on the guide rod 703 through the waist-shaped hole 705 and is slidably connected with the guide rod 703. When the cylinder 408 cooperates with the piston rod 409 to repeatedly push and pull the connecting seat 405, the connecting shaft 404 drives the push plate 704 to rotate, and the waist-shaped hole 705 in the push plate 704 drives the return pipe 702 to rotate around the rotary joint 701, so that the plastic that needs to be crushed again is uniformly poured into the crushing box 201, further avoiding the problem that the crushing disc 206 is jammed due to the accumulation of plastic.

[0027] It should be noted that, when the crushing device for plastic processing is used, the material to be crushed is first poured into the feeding hopper 401, and the cylinder 408 is started. Since the output end of the cylinder 408 is connected with the connecting seat 405 through the piston rod 409, the connecting seat 405 is rotatably connected with the adjusting rods 406 on both sides, and the ends of the two adjusting rods 406 away from the connecting seat 405 are rotatably connected with the end walls of the two rotating plates 403. When the cylinder 408 drives the piston rod 409 to elongate, the connecting seat 405 slides reversely, and the adjusting rods 406 on both sides of the connecting seat 405 drive the two rotating plates 403 to reversely rotate around the connecting shaft 404. The cylinder 408 cooperates with the piston rod 409 to repeatedly push and pull the connecting seat 405, so that the two rotating plates 403 reciprocatingly rotate to adjust the width of the discharging gap formed between the two guide plates 402, so that the plastic can be uniformly discharged along the length direction of the feeding hopper 401. Not only can the problem that the crushing disc 206 is jammed by the accumulated plastic be avoided, but also since the width of the two ends of the discharging gap is always in a state of change, the material can be prevented from being jammed when passing through the discharging gap as much as possible, so that the problem that the plastic cannot be discharged can be avoided.

[0028] The two side inner walls of the crushing box 201 are connected with the cooling box 303 through the ear plate 302 and the inclined plate 301, the cooling box 303 is filled with cooling liquid, the hollow scraper 304 for cleaning the blade 207 is installed on the side wall of the cooling box 303, the internal cavity of the hollow scraper 304 is communicated with the cooling box 303, so that the cooling liquid in the cooling box 303 can enter the hollow scraper 304 to cool the hollow scraper 304, when the blade 207 rotates to adhere to the hollow scraper 304, the hollow scraper 304 can also exchange heat with the cooling liquid, so as to avoid that the temperature of the blade 207 is too high due to long-time extrusion and friction, thereby reducing the adhesion of the plastic on the blade 207.

[0029] The supporting table 102 is provided with the material conveying pipe 602 for conveying the plastic with a substandard crushing diameter into the feeding hopper 401, the top end of the material conveying pipe 602 is communicated with the upper discharging pipe 607, one end of the upper discharging pipe 607 in the feeding hopper 401 is rotationally connected with the return pipe 702 through the rotary joint 701, when the gas cylinder 408 repeatedly pushes and pulls the connecting seat 405 through the piston rod 409, the two rotating plates 403 rotate back and forth, the connecting shaft 404 drives the rotating plate 704 to rotate, the return pipe 702 is driven to rotate around the rotary joint 701 through the waist-shaped hole 705 arranged on the rotating plate 704, and the plastic needing secondary crushing is uniformly poured into the crushing box 201, so that the problem that the crushing disc 206 is stuck due to the accumulation of the plastic is further avoided.

[0030] The above-mentioned embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A crushing device for plastic processing, comprising a support assembly, wherein a crushing assembly is mounted on the support assembly, characterized in that: A feed hopper (401) is installed on the top of the crushing assembly. Guide plates (402) are fixedly connected to the inner walls on both sides of the feed hopper (401). A material discharge gap is left between the bottom ends of the two guide plates (402). A rotating plate (403) is set below the two guide plates (402). A connecting shaft (404) is fixedly inserted through the middle section of the rotating plate (403). The top end of the connecting shaft (404) is rotatably connected to the bottom wall of the guide plate (402). A protective cover (407) is fixedly inserted through the feed hopper (401). A cylinder (408) is installed on the outer side wall of the protective cover (407). A piston rod (409) is installed at the output end of the cylinder (408). The piston rod (409) extends through the end side wall of the protective cover (407) into the feed hopper (401). A connecting seat (405) is fixedly connected to one end of the piston rod (409). Adjusting rods (406) are rotatably connected to both sides of the connecting seat (405). The ends of the two adjusting rods (406) away from the connecting seat (405) are rotatably connected to the ends of the two rotating plates (403). A feeding component is connected to the bottom of the crushing component. A secondary crushing and conveying structure is installed on the support component on one side of the feeding component.

2. The crushing device for plastic processing according to claim 1, characterized in that: The support assembly includes a bottom bracket (101), a support platform (102) is fixedly connected to the upper surface of one end of the bottom bracket (101), an upper bracket (103) is fixedly connected to the top of the other end of the bottom bracket (101), and a side bracket (104) is welded and fixed to one side wall of the upper bracket (103).

3. The crushing device for plastic processing according to claim 2, characterized in that: The crushing assembly includes a crushing box (201) fixedly installed inside the upper bracket (103). Two drive shafts (204) are rotatably connected inside the crushing box (201). A set of crushing discs (206) is sleeved on each of the two drive shafts (204). The two sets of crushing discs (206) are staggered. Blades (207) are integrally formed on the periphery of each set of crushing discs (206). Two adjacent crushing discs (206) in each set are separated by a partition disc (208) sleeved on the drive shaft (204).

4. The crushing device for plastic processing according to claim 3, characterized in that: A reduction gearbox (202) is fixedly connected to the top of the side bracket (104). A reduction gear set is provided inside the reduction gearbox (202). The output end of the reduction gearbox (202) is fixedly connected to the end of one of the drive shafts (204). A first motor (203) is fixedly installed on the outer wall of one side of the reduction gearbox (202). The output end of the first motor (203) is fixedly connected to the input end of the reduction gearbox (202). Gears (205) are fixedly connected to the ends of the two drive shafts (204) away from the reduction gearbox (202). The two gears (205) mesh with each other.

5. The crushing device for plastic processing according to claim 3, characterized in that: Inclined plates (301) are provided on both inner walls of the crushing box (201) along the axial direction of the drive shaft (204). The two ends of the inclined plates (301) are fixed to the inner wall of the crushing box (201) through ear plates (302). A cooling box (303) is fixedly connected to the bottom end of the inclined plates (301). A hollow scraper (304) is fixedly connected to the side of the cooling box (303) near the drive shaft (204). The width of the hollow scraper (304) is set according to the distance between two adjacent crushing discs (206). The free end of the hollow scraper (304) extends into the gap formed between two adjacent crushing discs (206).

6. The crushing device for plastic processing according to claim 3, characterized in that: The feeding assembly includes a feeding hopper (501) located at the bottom of the crushing box (201). The outer wall of the feeding hopper (501) is fixedly connected to the upper support (103). A discharge port (502) is provided at the bottom of the feeding hopper (501). A downwardly inclined guide plate (503) is fixedly installed on the inner wall of the top side of the feeding hopper (501). A filter plate (504) is provided below the guide plate (503) and is fixedly connected to the inner wall of the feeding hopper (501) on its periphery. The filter plate (504) is inclined. A collection box (505) is connected to the side wall of the feeding hopper (501) at the lower end of the filter plate (504). A lower discharge pipe (506) is fixedly connected to the bottom of the collection box (505).

7. A crushing device for plastic processing according to claim 6, characterized in that: The secondary crushing and conveying structure includes a conveying pipe (602) set above the support platform (102). The bottom end of the conveying pipe (602) is fixedly connected to the support platform (102) through the pipe seat (601). A sealing cover (603) is fixedly fitted on the top end of the conveying pipe (602). An auger (605) is set inside the conveying pipe (602). The two ends of the auger (605) are rotatably connected to the pipe seat (601) and the sealing cover (603) respectively. A second motor (606) for driving the auger (605) to rotate is fixedly installed on the bottom wall of the support platform (102). A downwardly inclined upper discharge pipe (607) is connected to the side of the sealing cover (603) near the feed hopper (401). The end of the upper discharge pipe (607) away from the sealing cover (603) extends through the side wall of the feed hopper (401) into the feed hopper (401).

8. A crushing device for plastic processing according to claim 7, characterized in that: The middle section of the conveying pipe (602) is fitted with a support ring (604). Multiple annularly distributed screws are screwed around the support ring (604). One end of the screw located inside the support ring (604) abuts against the outer wall of the conveying pipe (602). A fixing frame is provided on the side of the support ring (604) near the upper bracket (103) and is fixedly connected to the side wall of the upper bracket (103).

9. A crushing device for plastic processing according to claim 7, characterized in that: The upper discharge pipe (607) is located inside the feed hopper (401) and is rotatably connected to the return pipe (702) via a rotary joint (701). A guide rod (703) is fixedly connected to the upper surface of the return pipe (702). One of the connecting shafts (404) extends downward and is fixedly connected to a lever (704). A waist-shaped hole (705) is provided on the lever (704). The lever (704) is sleeved on the guide rod (703) through the waist-shaped hole (705) and is slidably connected to the guide rod (703).

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