Plastic product processing material crushing device

Abstract

The invention discloses a plastic product processing material smashing device, and relates to the technical field of plastic product processing, the plastic product processing material smashing device comprises a supporting rack, universal wheels with brakes are installed at the four corners of the bottom of the supporting rack, and a primary smashing mechanism, a secondary smashing mechanism and a conveying mechanism are sequentially arranged above the supporting rack from top to bottom; the primary smashing mechanism comprises a primary smashing bin, two smashing rollers, a protective cover, a first driving motor fixedly installed on the side wall of the protective cover and a linkage assembly arranged in the protective cover. Through cooperation of the primary crushing mechanism and the secondary crushing mechanism, a pair of crushing rollers in the primary crushing mechanism rotate relatively to primarily extrude and crush plastic products; and then the plastic materials subjected to primary crushing can be crushed more finely through high-speed rotary cutting of a plurality of alloy crushing blades in the secondary crushing mechanism, so that the plastic materials can be fully crushed, and the crushing effect of the plastic materials is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic product processing, and in particular to a material crushing device for plastic product processing. Background Art

[0002] The processing of plastic products involves material crushing. Traditional material crushing devices are generally double-roll crushing structures, which use two relatively rotating crushing rollers to squeeze and crush plastic materials. There are the following disadvantages during use:

[0003] First, the fineness of the plastic material pulverization is relatively poor, and the plastic material cannot be fully pulverized, resulting in poor pulverization effect, and the particle size of the pulverized material varies greatly, which is not conducive to subsequent processing;

[0004] Secondly, during the relative rotation of the two crushing rollers, the surface of the crushing rollers may easily overheat, causing the plastic to deform or even melt, thereby failing to ensure the normal operation of the crushing equipment and the material crushing effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a material crushing device for processing plastic products, which effectively solves the problems that the existing crushing devices have relatively poor crushing fineness, cannot fully crush the plastic materials, resulting in poor crushing effect, and the particle size of the crushed materials varies greatly, which is not conducive to subsequent processing. It also solves the problem that when two crushing rollers rotate relative to each other during the crushing process, the surface of the crushing rollers is easily overheated, causing the plastic to deform or even melt, thereby failing to ensure the normal operation of the crushing equipment and the material crushing effect.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A material crushing device for processing plastic products, comprising a support frame with universal wheels with brakes installed at the four corners of the bottom, and a primary crushing mechanism, a secondary crushing mechanism and a conveying mechanism are arranged in sequence from top to bottom on the support frame;

[0008] The primary crushing mechanism comprises a primary crushing bin, two crushing rollers rotatably mounted in the primary crushing bin, a protective cover fixedly connected to the side wall of the primary crushing bin, a driving motor fixedly mounted on the side wall of the protective cover, and a linkage assembly arranged in the protective cover;

[0009] The primary crushing bin is symmetrically provided with two symmetrically distributed reciprocating heat dissipation components, and the two reciprocating heat dissipation components are respectively distributed on one side of the two crushing rollers, and the secondary crushing mechanism includes a secondary crushing bin fixedly connected to the outer wall of the bottom of the primary crushing bin, a knife roller shaft rotatably installed in the secondary crushing bin, a plurality of alloy crushing blades fixedly installed on the knife roller shaft and distributed at equal distances, a vibration screening component located below the knife roller shaft, a driving component and a material return component;

[0010] The reciprocating heat dissipation assembly includes a reciprocating screw rotatably installed in the primary crushing bin, a reciprocating slider adapted to be installed on the reciprocating screw and capable of reciprocating movement, a heat dissipation fan fixedly installed on the outer wall of the bottom of the reciprocating slider, a guide shaft welded in the primary crushing bin and slidably matched with the reciprocating slider, and a gear transmission arranged in a protective cover.

[0011] As a preferred technical solution of the present invention, the linkage assembly includes a transmission shaft rotatably installed in the protective cover, two worms fixedly mounted on the transmission shaft, and two worm wheels fixedly mounted on one end of the two crushing rollers in turn, and the output shaft of the drive motor passes through one side of the protective cover and is coaxially fixedly connected to one end of the transmission shaft through a coupling.

[0012] As a preferred technical solution of the present invention, the two worms are respectively meshed with the two worm wheels, and the spiral directions of the two worms are opposite.

[0013] As a preferred technical solution of the present invention, the gear transmission includes a bevel gear 1 fixedly mounted on one end of the reciprocating screw and a bevel gear 2 fixedly mounted on the transmission shaft and meshing with the bevel gear 1.

[0014] As a preferred technical solution of the present invention, the vibrating screening assembly includes an inclined screen connected to the inner wall of the secondary crushing bin through four spring telescopic parts distributed in a rectangular array, a contact block fixedly connected to the bottom of the inclined screen, a shaft rotatably installed in the secondary crushing bin, a cam fixedly mounted on the shaft and located below the contact block, and a discharge port opened on one side of the secondary crushing bin and located in the bottom area of ​​the inclined screen.

[0015] As an optimal technical solution of the present invention, the driving assembly includes a support plate welded to the outer wall of the rear side of the secondary crushing bin, a second driving motor fixedly mounted on the side wall of the support plate, a double-groove pulley fixedly mounted on the output shaft of the second driving motor, a single-groove pulley fixedly mounted on one end of the knife roller shaft, and a single-groove pulley fixedly mounted on one end of the shaft body.

[0016] As an optimal technical solution of the present invention, the output shaft of the second driving motor passes through the supporting plate, the single-groove pulley one is connected to the double-groove pulley through a transmission belt one, and the single-groove pulley two is connected to the double-groove pulley through a transmission belt two.

[0017] As an optimal technical solution of the present invention, the return material assembly includes a suction air pump fixedly installed on the side wall of the secondary crushing bin, a suction cover fixedly connected to the lower part of the secondary crushing bin and adapted to the discharge port, and a return material cover fixedly connected to the upper part of the secondary crushing bin.

[0018] As a preferred technical solution of the present invention, the extraction end of the extraction air pump is fixedly connected to the extraction cover through the extraction pipe, and the feeding end of the extraction air pump is fixedly connected to the return cover through the feeding pipe.

[0019] As a preferred technical solution of the present invention, the conveying mechanism includes a conveying cylinder welded to the top outer wall of the supporting frame, a discharge bin fixedly connected between the secondary crushing bin and the conveying cylinder, a bearing plate welded to the side wall of the supporting frame, a conveying motor fixedly installed on the top outer wall of the bearing plate, a conveying shaft rotatably installed in the conveying cylinder and an auger conveying blade welded on the conveying shaft and located in the conveying cylinder, and the output shaft of the conveying motor is coaxially fixedly connected to one end of the conveying shaft through a coupling.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention cooperates with the primary crushing mechanism and the secondary crushing mechanism. The pair of crushing rollers in the primary crushing mechanism rotate relative to each other to initially squeeze and crush the plastic products. Subsequently, the high-speed rotary cutting of the multiple alloy crushing blades in the secondary crushing mechanism can further finely crush the plastic materials after the primary crushing. In this way, the plastic materials can be fully crushed, and the crushing effect of the plastic materials is effectively improved.

[0022] 2. The present invention cooperates with the vibration screening component and the return material component to quickly screen out the materials with qualified crushing particle size through the vibration screening component, and the materials with unqualified crushing particle size will return to the secondary crushing bin from the bottom of the inclined screen through the return material component to continue crushing until the particles with qualified particle size are screened out by the inclined screen. In this way, the particle size uniformity of the crushed materials can be effectively improved, and the particle size difference between the materials can be reduced, so as to facilitate subsequent processing;

[0023] 3. The present invention adopts the arrangement of two reciprocating heat dissipation components, and two heat dissipation fans reciprocate in the primary crushing bin to evenly cool the surfaces of the two crushing rollers, and at the same time, the heat in the entire crushing bin can be taken out, so that the surface of the crushing rollers can be effectively prevented from being overheated during the crushing process, which may cause deformation or even melting of the plastic, thereby ensuring the normal operation of the crushing equipment and the material crushing effect;

[0024] 4. The present invention sets a conveying mechanism and controls the rotation of the auger conveying blades on the conveying shaft through the conveying motor, so that the crushed plastic material entering the conveying cylinder from the discharge bin can be automatically conveyed to the subsequent plastic product processing machine. In this way, there is no need for workers to transport materials back and forth, avoiding the waste of time and manpower in the process of manual material transportation, thereby effectively improving the work efficiency of workers and the overall processing efficiency of plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the overall front-view three-dimensional structure of the present invention;

[0027] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the primary crushing mechanism in the present invention;

[0028] Figure 3 It is a schematic diagram of the side view structure inside the protective cover of the present invention;

[0029] Figure 4 It is a three-dimensional enlarged structural schematic diagram of the reciprocating heat dissipation component in the present invention;

[0030] Figure 5 It is a three-dimensional enlarged structural schematic diagram of the secondary crushing mechanism in the present invention;

[0031] Figure 6 It is a three-dimensional enlarged structural schematic diagram of the secondary crushing bin after one side is cut off in the present invention;

[0032] Figure 7 For the present invention Figure 6 A schematic diagram of a front plan structure;

[0033] Figure 8 It is a partial front view structural schematic diagram of the conveying tube in the vertical cross-section state of the present invention;

[0034] Fig. 9 It is a three-dimensional enlarged structural schematic diagram of the conveying mechanism in the present invention.

[0035] In the figure: 1. Support frame; 2. Primary crushing bin; 3. Crushing roller; 4. Protective cover; 5. Driving motor 1; 6. Transmission shaft; 7. Worm; 8. Worm wheel; 9. Reciprocating screw; 10. Reciprocating slider; 11. Cooling fan; 12. Guide shaft; 13. Bevel gear 1; 14. Bevel gear 2; 15. Secondary crushing bin; 16. Knife roller shaft; 17. Alloy crushing blade; 18. Inclined screen; 19. Contact block; 20. Shaft body; 21. Cam; 22. Spring telescopic member; 23. Support plate; 24. Driving motor 2; 25. Double-groove pulley; 26. Single-groove pulley 1; 27. Single-groove pulley 2; 28. Extraction air pump; 29. ​​Extraction cover; 30. Return cover; 31. Discharge bin; 32. Conveying cylinder; 33. Loading plate; 34. Conveying motor; 35. Conveying shaft; 36. Auger conveying blade. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Example 1, reference Figure 1-4 A material crushing device for processing plastic products comprises a support frame 1 with universal wheels with brakes installed at the four corners of the bottom, and a primary crushing mechanism, a secondary crushing mechanism and a conveying mechanism are arranged in sequence from top to bottom on the support frame 1;

[0038] In this embodiment, the primary crushing mechanism includes a primary crushing bin 2, two crushing rollers 3 rotatably mounted in the primary crushing bin 2, a protective cover 4 fixedly connected to the side wall of the primary crushing bin 2, a driving motor 5 fixedly mounted on the side wall of the protective cover 4, and a linkage assembly arranged in the protective cover 4;

[0039] Furthermore, the linkage assembly includes a transmission shaft 6 rotatably mounted in the protective cover 4, two worms 7 fixedly mounted on the transmission shaft 6, and two worm wheels 8 fixedly mounted on one end of the two crushing rollers 3 in sequence. The output shaft of the driving motor 5 passes through one side of the protective cover 4 and is coaxially fixedly connected to one end of the transmission shaft 6 through a coupling. The two worms 7 are respectively meshed with the two worm wheels 8, and the spiral directions of the two worms 7 are opposite.

[0040] In this embodiment, two symmetrically distributed reciprocating heat dissipation components are symmetrically arranged in the primary crushing bin 2, and the two reciprocating heat dissipation components are respectively distributed on one side of the two crushing rollers 3. The primary crushing bin 2 is made of aluminum alloy metal and has good heat dissipation performance.

[0041] Furthermore, the reciprocating heat dissipation assembly includes a reciprocating screw 9 rotatably mounted in the primary crushing bin 2, a reciprocating slider 10 adapted to be mounted on the reciprocating screw 9 and capable of reciprocating movement, a heat dissipation fan 11 fixedly mounted on the bottom outer wall of the reciprocating slider 10, a guide shaft 12 welded in the primary crushing bin 2 and slidably matched with the reciprocating slider 10, and a gear transmission arranged in the protective cover 4;

[0042] Furthermore, the gear transmission device includes a bevel gear 13 fixedly mounted on one end of the reciprocating screw 9 and a bevel gear 2 14 fixedly mounted on the transmission shaft 6 and meshing with the bevel gear 13. Through the transmission cooperation of the two gear transmission devices and the two sets of worm 7 and worm wheel 8, the relative rotation of the two crushing rollers 3 and the joint rotation of the two reciprocating screws 9 are achieved, and the number of the four drives originally required to be used is successfully reduced to one;

[0043] In the specific implementation of this embodiment: first, the two worms 7 on the transmission shaft 6 are controlled to rotate by the driving motor 1 5, and then the two worms 7 with opposite spiral directions drive the two crushing rollers 3 on the two worm wheels 8 to rotate relative to each other, so that the plastic materials entering the primary crushing bin 2 can be initially squeezed and crushed;

[0044] Secondly, the rotation of the transmission shaft 6 will drive the two bevel gears 2 14 to rotate, and then the two bevel gears 1 13 meshing with the two bevel gears 2 14 will drive the two reciprocating screws 9 to rotate, and then under the guidance of the two guide shafts 12, the two reciprocating sliders 10 will drive the two cooling fans 11 to reciprocate in the primary crushing bin 2 to evenly cool the surfaces of the two crushing rollers 3, and at the same time, the heat in the entire crushing bin can be brought out, so that the surface of the crushing roller 3 can be effectively prevented from overheating during the crushing process, which may cause deformation or even melting of the plastic, thereby ensuring the normal operation of the crushing equipment and the material crushing effect.

[0045] Example 2, reference Figure 1 and Figure 5-7 , this embodiment is optimized on the basis of embodiment 1, specifically: a material crushing device for processing plastic products, further comprising a secondary crushing mechanism disposed below the primary crushing mechanism;

[0046] In this embodiment, the secondary crushing mechanism includes a secondary crushing bin 15 fixedly connected to the outer wall of the bottom of the primary crushing bin 2, a knife roller shaft 16 rotatably mounted in the secondary crushing bin 15, a plurality of alloy crushing blades 17 fixedly mounted on the knife roller shaft 16 and distributed at equal distances, a vibration screening assembly, a driving assembly and a return assembly located below the knife roller shaft 16, and the secondary crushing bin 15 is also made of aluminum alloy metal and has good heat dissipation performance;

[0047] Furthermore, the vibrating screening assembly includes an inclined screen 18 connected to the inner wall of the secondary crushing bin 15 through four spring expansion members 22 distributed in a rectangular array, a contact block 19 fixedly connected to the bottom of the inclined screen 18, a shaft 20 rotatably mounted in the secondary crushing bin 15, a cam 21 fixedly sleeved on the shaft 20 and located below the contact block 19, and a discharge port opened on one side of the secondary crushing bin 15 and located in the bottom area of ​​the inclined screen 18;

[0048] Further, the driving assembly includes a support plate 23 welded to the rear outer wall of the secondary crushing bin 15, a driving motor 24 fixedly mounted on the side wall of the support plate 23, a double-groove pulley 25 fixedly mounted on the output shaft of the driving motor 24, a single-groove pulley 26 fixedly mounted on one end of the knife roller shaft 16, and a single-groove pulley 27 fixedly mounted on one end of the shaft body 20, the output shaft of the driving motor 24 passes through the support plate 23, the single-groove pulley 26 is connected to the double-groove pulley 25 through a transmission belt 1, and the single-groove pulley 27 is connected to the double-groove pulley 25 through a transmission belt 2;

[0049] Furthermore, the return assembly includes a suction air pump 28 fixedly mounted on the side wall of the secondary crushing bin 15, a suction cover 29 fixedly connected to the lower part of the secondary crushing bin 15 and adapted to the discharge port, and a return cover 30 fixedly connected to the upper part of the secondary crushing bin 15. The suction end of the suction air pump 28 is fixedly connected to the suction cover 29 through a suction pipe, and the feeding end of the suction air pump 28 is fixedly connected to the return cover 30 through a feeding pipe.

[0050] When the reflux assembly is working, the suction force generated by the start-up of the suction air pump 28 can suck the unqualified plastic materials at the bottom of the inclined screen 18 into the suction cover 29 and finally return them to the secondary crushing bin 15 from the return cover 30, so that the unqualified plastic materials can be recycled and crushed.

[0051] In the specific implementation of this embodiment: first, the double-groove pulley 25 is controlled to rotate by the driving motor 24, and then the single-groove pulley 26 drives the knife roller shaft 16 to rotate under the transmission effect of the transmission belt 1, and the cam 21 on the shaft body 20 rotates under the transmission effect of the transmission belt 2, so that the linkage effect of the two is achieved, which is conducive to reducing the number of drivers used and reducing equipment costs;

[0052] Secondly, the knife roller shaft 16 will drive the multiple alloy crushing blades 17 to rotate at high speed, and can further crush the plastic material after primary crushing, so that the plastic material can be fully crushed, effectively improving the crushing effect of the plastic material;

[0053] Next, the shaft 20 drives the cam 21 to rotate continuously, so that the cam 21 squeezes the contact block 19 and causes the four spring telescopic rods 22 to be elastically deformed. When the cam 21 is separated from the contact block 19, the contact block 19 returns to its original position under the rebound effect of the four spring telescopic rods 22. When the cam 21 rotates again to contact the contact block 19, squeezing is formed again. In this way, the inconvenient rotation of the cam 21 will form a reciprocating motion of squeezing, releasing, and squeezing again on the inclined screen 18, so that the inclined screen 18 vibrates to achieve the effect of vibrating screening.

[0054] Finally, through the vibration effect of the inclined screen 18, the material with qualified particle size can be quickly screened out, and the material with unqualified particle size will return to the secondary crushing bin 15 from the bottom of the inclined screen 18 through the return assembly to continue to be crushed until the particle size is qualified and is screened out by the inclined screen 18. This can effectively improve the uniformity of the particle size of the material after crushing and reduce the particle size difference between the materials, thereby facilitating subsequent processing.

[0055] Example 3, reference Figure 1 and Figure 8-9 , this embodiment is optimized on the basis of embodiment 1, specifically: a material crushing device for processing plastic products, further comprising a conveying mechanism disposed below the secondary crushing mechanism;

[0056] In this embodiment, the conveying mechanism includes a conveying cylinder 32 welded to the top outer wall of the support frame 1, a discharge bin 31 fixedly connected between the secondary crushing bin 15 and the conveying cylinder 32, a bearing plate 33 welded to the side wall of the support frame 1, a conveying motor 34 fixedly mounted on the top outer wall of the bearing plate 33, a conveying shaft 35 rotatably mounted in the conveying cylinder 32, and an auger conveying blade 36 welded on the conveying shaft 35 and located in the conveying cylinder 32. The output shaft of the conveying motor 34 is coaxially fixedly connected to one end of the conveying shaft 35 through a coupling.

[0057] In the specific implementation of this embodiment: the conveying motor 34 controls the rotation of the auger conveying blades 36 on the conveying shaft 35 to automatically convey the plastic materials that have been crushed and entered into the conveying cylinder 32 from the discharge bin 31 to the subsequent plastic product processing machine. In this way, there is no need for workers to transport materials back and forth, avoiding the waste of time and manpower in the process of manual material transportation, thereby effectively improving the work efficiency of workers and the overall processing efficiency of plastic products.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A material crushing device for processing plastic products, comprising a support frame (1) with universal wheels with brakes installed at the four corners of the bottom, characterized in that: A primary crushing mechanism, a secondary crushing mechanism and a conveying mechanism are arranged in order from top to bottom on the support frame (1); The primary crushing mechanism comprises a primary crushing bin (2), two crushing rollers (3) rotatably mounted in the primary crushing bin (2), a protective cover (4) fixedly connected to the side wall of the primary crushing bin (2), a driving motor (5) fixedly mounted on the side wall of the protective cover (4), and a linkage assembly arranged in the protective cover (4); Two symmetrically distributed reciprocating heat sinks are symmetrically arranged in the primary crushing bin (2), and the two reciprocating heat sinks are respectively distributed on one side of two crushing rollers (3); the secondary crushing mechanism comprises a secondary crushing bin (15) fixedly connected to the outer wall of the bottom of the primary crushing bin (2), a knife roller shaft (16) rotatably mounted in the secondary crushing bin (15), a plurality of alloy crushing blades (17) fixedly mounted on the knife roller shaft (16) and distributed at equal distances, a vibration screening component located below the knife roller shaft (16), a driving component and a material return component; The reciprocating heat dissipation assembly comprises a reciprocating screw (9) rotatably mounted in a primary crushing bin (2), a reciprocating slider (10) adapted to be mounted on the reciprocating screw (9) and capable of reciprocating movement, a heat dissipation fan (11) fixedly mounted on the bottom outer wall of the reciprocating slider (10), a guide shaft (12) welded in the primary crushing bin (2) and slidably engaged with the reciprocating slider (10), and a gear transmission arranged in a protective cover (4).

2. A plastic product processing material crushing device according to claim 1, characterized in that: The linkage assembly comprises a transmission shaft (6) rotatably mounted in the protective cover (4), two worms (7) fixedly mounted on the transmission shaft (6), and two worm wheels (8) fixedly mounted on one end of two crushing rollers (3) in sequence, and an output shaft of a driving motor (5) passes through one side of the protective cover (4) and is coaxially fixedly connected to one end of the transmission shaft (6) through a coupling.

3. The material crushing device for processing plastic products according to claim 2, characterized in that: The two worms (7) are respectively meshed with the two worm wheels (8), and the spiral directions of the two worms (7) are opposite.

4. The material crushing device for processing plastic products according to claim 1, characterized in that: The gear transmission comprises a bevel gear 1 (13) fixedly mounted on one end of a reciprocating screw rod (9) and a bevel gear 2 (14) fixedly mounted on a transmission shaft (6) and meshing with the bevel gear 1 (13).

5. The material crushing device for processing plastic products according to claim 1, characterized in that: The vibrating screening assembly comprises an inclined screen (18) connected to the inner wall of a secondary crushing bin (15) via four spring expansion members (22) distributed in a rectangular array, a contact block (19) fixedly connected to the bottom of the inclined screen (18), a shaft (20) rotatably mounted in the secondary crushing bin (15), a cam (21) fixedly mounted on the shaft (20) and located below the contact block (19), and a discharge port opened on one side of the secondary crushing bin (15) and located in the bottom area of ​​the inclined screen (18).

6. The material crushing device for processing plastic products according to claim 1, characterized in that: The driving assembly comprises a support plate (23) welded to the rear outer wall of the secondary crushing bin (15), a second driving motor (24) fixedly mounted on the side wall of the support plate (23), a double-groove pulley (25) fixedly mounted on the output shaft of the second driving motor (24), a single-groove pulley (26) fixedly mounted on one end of the knife roller shaft (16), and a second single-groove pulley (27) fixedly mounted on one end of the shaft body (20).

7. The material crushing device for processing plastic products according to claim 6, characterized in that: The output shaft of the second driving motor (24) passes through the supporting plate (23), the first single-groove pulley (26) is connected to the double-groove pulley (25) through a first transmission belt, and the second single-groove pulley (27) is connected to the double-groove pulley (25) through a second transmission belt.

8. The material crushing device for processing plastic products according to claim 1, characterized in that: The material return assembly comprises a material extraction air pump (28) fixedly mounted on the side wall of the secondary crushing bin (15), a material extraction cover (29) fixedly connected to the lower part of the secondary crushing bin (15) and adapted to the material discharge port, and a material return cover (30) fixedly connected to the upper part of the secondary crushing bin (15).

9. The material crushing device for processing plastic products according to claim 8, characterized in that: The extraction end of the extraction air pump (28) is fixedly connected to the extraction cover (29) via the extraction pipeline, and the feeding end of the extraction air pump (28) is fixedly connected to the return cover (30) via the feeding pipeline.

10. The material crushing device for processing plastic products according to claim 1, characterized in that: The conveying mechanism comprises a conveying cylinder (32) welded to the top outer wall of a support frame (1), a discharge bin (31) fixedly connected between the secondary crushing bin (15) and the conveying cylinder (32), a bearing plate (33) welded to the side wall of the support frame (1), a conveying motor (34) fixedly mounted on the top outer wall of the bearing plate (33), a conveying shaft (35) rotatably mounted in the conveying cylinder (32), and an auger conveying blade (36) welded to the conveying shaft (35) and located in the conveying cylinder (32), and the output shaft of the conveying motor (34) is coaxially fixedly connected to one end of the conveying shaft (35) through a coupling.

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