Waste crushing and recycling treatment device for plastic injection molding parts of electric bicycles

Abstract

The invention belongs to the technical field of plastic recycling, and particularly relates to a waste crushing and recycling treatment device for plastic injection molding parts of electric bicycles, which comprises a circular box body and a controller arranged on one side of the circular box body, and further comprises a main crushing roller, a secondary crushing roller and a waste recycling device, the main crushing roller is rotationally arranged in the center of the interior of the circular box body; the multiple sets of auxiliary crushing rollers are annularly distributed on the outer side of the main crushing roller, and the inter-axis distance between the multiple sets of auxiliary crushing rollers and the main crushing roller is gradually decreased in the anticlockwise direction. Efficient multi-stage crushing of plastic injection molding parts of the electric bicycles can be achieved, the crushing efficiency is remarkably improved, the equipment size can be greatly reduced, occupied space is reduced, workshop layout is optimized, meanwhile, it can be guaranteed that the crushed particle size is uniform and stable, unqualified materials are automatically returned, dust escape and screen hole blockage are effectively restrained, and the service life of the equipment is prolonged. And the production cleanliness and stability are improved.

Description

Technical Field

[0001] This invention belongs to the field of plastic recycling technology, and in particular relates to a waste crushing and recycling device for plastic injection molded parts of electric bicycles. Background Technology

[0002] Electric bicycles contain a large number of plastic parts, which are mainly produced by injection molding. During the production process, injection molded parts will generate gates, runners, defective products, and trial mold waste, accounting for about 3%-10%. Directly discarding these parts will result in waste of raw materials and increased costs. In order to achieve resource utilization, the waste materials need to be crushed and made into uniform particles, which are then mixed with new materials for reuse, in order to reduce production costs and improve material utilization.

[0003] To meet the requirements of rapid recycling and reuse, the injection molded parts of electric bicycles have high requirements for the uniformity of their crushed particle size. To ensure uniform crushed particle size and meet the requirements for recycling, existing plastic crushing equipment usually integrates multiple crushing rollers inside the equipment. The material is crushed into coarse, medium and fine crushing by passing through different roller groups in sequence. Although this design can complete multi-stage crushing in a single machine, it has obvious defects. The multiple crushing rollers are arranged in a straight line or plane, which not only affects the crushing efficiency of plastics, but also results in the overall size of the equipment being large and occupying a large area, which is not conducive to the compact layout of the workshop. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a waste crushing and recycling device for plastic injection molded parts of electric bicycles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waste crushing and recycling device for plastic injection molded parts of electric bicycles, comprising a circular box and a controller disposed on one side of the circular box, wherein a feeding hopper is disposed on the top of the circular box, and further comprising:

[0006] The main crushing roller is rotatably positioned at the center of the interior of the circular housing;

[0007] Multiple sets of auxiliary crushing rollers are arranged in a ring outside the main crushing roller, and the interaxial distance between the multiple sets of auxiliary crushing rollers and the main crushing roller gradually decreases in a counterclockwise direction;

[0008] A drive unit is installed on the side wall of the circular housing, and the drive unit drives the main crushing roller and the auxiliary crushing roller to rotate;

[0009] A discharge unit is installed at the discharge port of the circular box, and the discharge unit is used to screen plastic particles;

[0010] A return material unit is located inside the circular box. The return material unit is used to push the plastic particles back to the feed ends of the main crushing roller and the auxiliary crushing roller.

[0011] Preferably, the drive unit includes a drive shaft rotatably mounted on the side wall of the circular housing. The drive shaft is connected to the main crushing roller shaft via a belt drive assembly. A drive gear is fixed to the end of the drive shaft, and a driven gear is fixed to the end of each of the auxiliary crushing roller shafts. Adjacent driven gears mesh with each other. The drive gear meshes with the driven gear on the same side. A detachable mounting cover is installed on the outer side wall of the circular housing, and a first motor is fixed to the side wall of the mounting cover. The drive end of the first motor is connected to the main crushing roller shaft, and the first motor is electrically connected to the controller.

[0012] Preferably, the discharge unit includes a discharge hopper detachably disposed at the discharge port of the circular box, the discharge hopper having a detachable arc plate installed inside, and the inner arc surface of the arc plate smoothly transitioning to the inner sidewall of the circular box, and the surface of the arc plate having a plurality of screening holes.

[0013] Preferably, the return material unit includes a drive shaft rotatably mounted on the side wall of a circular housing. A strip plate is fixedly connected to the shaft wall of the drive shaft, and a slide rod is fixed to the side wall of the strip plate. A C-shaped through hole matching the slide rod is opened on the side wall of the circular housing. A hollow scraper is slidably connected to the inner side wall of the circular housing. The end of the slide rod away from the strip plate passes through the C-shaped through hole and is fixedly connected to the end of the hollow scraper. An arc-shaped guide plate located outside the auxiliary crushing roller is fixed to the side of the interior of the circular housing away from the hollow scraper. A sealing cover is fixed to the outer side wall of the circular housing. A second motor is fixed to the side wall of the sealing cover, and the drive end of the second motor is connected to the drive shaft. The second motor is electrically connected to the controller. An air injection anti-blocking mechanism is fixed to the side wall of the sealing cover.

[0014] Preferably, the air injection anti-clogging mechanism includes an air pump fixed to the side wall of the sealing cover, the output end of the air pump is fixed with an air supply pipe that penetrates the side wall of the sealing cover, the air supply pipe is fixedly connected to a connecting hose, and the connecting hose is connected to the interior of the hollow scraper plate, the hollow scraper plate has several air jet holes at one end near the circular box, and the air pump is electrically connected to the controller.

[0015] Preferably, a baffle plate is provided on one side of the discharge end of the arc-shaped guide plate, and the baffle plate is hinged to the inner wall of the feed hopper.

[0016] Preferably, a filter box is fixed to the outer wall of the sealing cover, a filter screen is fixed inside the filter box, an air suction pipe is fixedly inserted into the top of the filter box, a hollow adsorption plate connected to the air suction pipe is fixed inside the feed hopper, and a number of dust suction holes are opened on the side wall of the hollow adsorption plate. The air suction end of the air pump is connected to the inside of the filter box, and the filter screen is disposed between the air suction end of the air pump and the air suction pipe.

[0017] Preferably, the gas supply pipe is a three-way pipe, one of the gas outlet ends of the gas supply pipe is connected to a connecting hose, and both gas outlet ends of the gas supply pipe are equipped with an electrically controlled valve that is electrically connected to the controller.

[0018] Compared with existing technologies, the advantages of a waste crushing and recycling device for plastic injection molded parts of electric bicycles are:

[0019] 1. By coordinating the circular housing, controller, feed hopper, main crushing roller, auxiliary crushing roller, and drive unit, multiple sets of auxiliary crushing rollers can be arranged around the main crushing roller. The gradually narrowing gap between the auxiliary crushing rollers and the main crushing roller allows for multi-stage crushing of plastic injection molded parts for electric bicycles. This not only improves the crushing efficiency of plastics but also reduces the size of the equipment and the space occupied.

[0020] 2. The set discharge unit can screen the crushed plastic to prevent the discharge of insufficiently crushed plastic and ensure that the particle size of the crushed plastic meets the requirements. In addition, with the set return unit, the unqualified plastic can be automatically returned to the feed end of the crushing structure for easy re-crushing.

[0021] 3. The air injection anti-clogging mechanism can prevent some plastic particles from clogging the screening holes and affecting the normal screening operation. In addition, the filter box, filter screen, air suction pipe, hollow adsorption plate and dust suction hole can adsorb and collect dust during the crushing process, minimizing dust escape. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the circular box of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention;

[0024] Figure 3 This is a schematic diagram of the distribution structure of the main crushing roller and the auxiliary crushing roller of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention.

[0025] Figure 4 This is a schematic diagram of the drive unit of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention;

[0026] Figure 5 This is a schematic diagram of the bottom structure of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention;

[0027] Figure 6This is a schematic diagram of the material recycling unit of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention;

[0028] Figure 7 This is a schematic diagram of the connection structure between the hollow scraper and the box body of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention.

[0029] Figure 8 This invention provides a waste crushing and recycling device for plastic injection molded parts of electric bicycles. Figure 1 Enlarged view of the structure of section A;

[0030] Figure 9 This is a schematic diagram of the internal structure of the filter box of a waste crushing and recycling device for plastic injection molded parts of electric bicycles provided by the present invention.

[0031] In the diagram: 1. Circular housing; 2. Controller; 3. Feed hopper; 4. Main crushing roller; 5. Secondary crushing roller; 6. Drive unit; 61. Transmission shaft; 62. Belt drive assembly; 63. Drive gear; 64. Driven gear; 65. Mounting cover; 66. First motor; 7. Discharge unit; 71. Discharge hopper; 72. Arc plate; 73. Screening hole; 8. Return unit; 81. Drive shaft; 82. Strip plate; 83. Slide rod; 84. C-shaped through hole; 85. Hollow scraper plate; 86. Arc guide plate; 87. Sealing cover; 88. Second motor; 9. Air injection anti-clogging mechanism; 91. Air pump; 92. Air supply pipe; 93. Connecting hose; 94. Air jet hole; 10. Baffle plate; 11. Filter box; 12. Filter screen; 13. Suction pipe; 14. Hollow adsorption plate; 15. Dust suction hole; 16. Electrically controlled valve. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] like Figures 1-9As shown, a waste crushing and recycling device for plastic injection molded parts of electric bicycles includes a circular box 1 and a controller 2 disposed on one side of the circular box 1. A feed hopper 3 is disposed on the top of the circular box 1. The device also includes a main crushing roller 4, which is rotatably disposed at the center of the circular box 1. Multiple sets of auxiliary crushing rollers 5 are distributed in a ring around the main crushing roller 4, and the axial distance between the auxiliary crushing rollers 5 and the main crushing roller 4 gradually decreases in a counterclockwise direction. A drive unit 6 is mounted on the side wall of the circular box 1 and drives the main crushing roller 4 and auxiliary crushing rollers 5 to rotate. The drive unit 6 includes components rotatably disposed on the side wall of the circular box 1. The drive shaft 61 is connected to the main crushing roller 4 via a belt drive assembly 62. A drive gear 63 is fixed to the end of the drive shaft 61. A driven gear 64 is fixed to the end of the roller shaft of each auxiliary crushing roller 5. Adjacent driven gears 64 mesh with each other. The drive gear 63 meshes with the driven gear 64 on the same side. A detachable mounting cover 65 is installed on the outer wall of the circular housing 1. A first motor 66 is fixed to the side wall of the mounting cover 65. The drive end of the first motor 66 is connected to the roller shaft of the main crushing roller 4. The first motor 66 is electrically connected to the controller 2. The blades on each auxiliary crushing roller 5 are staggered.

[0034] The discharge unit 7 is installed at the outlet of the circular box 1 and is used to screen plastic granules. The discharge unit 7 includes a discharge hopper 71 that is detachably installed at the outlet of the circular box 1. A detachable arc plate 72 is installed inside the discharge hopper 71, and the inner arc surface of the arc plate 72 smoothly transitions with the inner side wall of the circular box 1. Several screening holes 73 are opened on the surface of the arc plate 72. The arc plate 72 with screening holes 73 of appropriate diameter can be replaced according to the particle size requirements of the plastic granules.

[0035] The return material unit 8 is located inside the circular housing 1. The return material unit 8 is used to push plastic granules back to the feed ends of the main crushing roller 4 and the auxiliary crushing roller 5. The return material unit 8 includes a drive shaft 81 rotatably mounted on the side wall of the circular housing 1. A strip plate 82 is fixedly connected to the shaft wall of the drive shaft 81. A slide rod 83 is fixed to the side wall of the strip plate 82. A C-shaped through hole 84 matching the slide rod 83 is opened on the side wall of the circular housing 1. A hollow scraper plate 85 is slidably connected to the inner side wall of the circular housing 1. The end of the slide rod 83 away from the strip plate 82 passes through the C-shaped through hole 84 and is fixedly connected to the end of the hollow scraper plate 85. An arc-shaped guide plate 86 located outside the auxiliary crushing roller 5 is fixed to the side of the circular housing 1 away from the hollow scraper plate 85. The outer side wall of the circular housing 1... A sealing cover 87 is fixed, and a second motor 88 is fixed to the side wall of the sealing cover 87. The drive end of the second motor 88 is connected to the drive shaft 81. The second motor 88 is electrically connected to the controller 2. An air injection anti-blocking mechanism 9 is fixed to the side wall of the sealing cover 87. The air injection anti-blocking mechanism 9 includes an air pump 91 fixed to the side wall of the sealing cover 87. An air supply pipe 92 is fixed to the output end of the air pump 91 and passes through the side wall of the sealing cover 87. The air supply pipe 92 is fixedly connected to a connecting hose 93, and the connecting hose 93 is connected to the interior of the hollow scraper plate 85. Several air jet holes 94 are opened at one end of the hollow scraper plate 85 near the circular box 1. The air pump 91 is electrically connected to the controller 2 and can blow out the plastic particles blocked in the screening hole 73 to prevent the screening hole 73 from being blocked.

[0036] A baffle plate 10 is provided on one side of the discharge end of the arc-shaped guide plate 86, and the baffle plate 10 is hinged to the inner wall of the feed hopper 3. The baffle plate 10 can prevent the plastic parts fed into the feed hopper 3 from sliding to one side of the arc-shaped guide plate 86.

[0037] A filter box 11 is fixed to the outer wall of the sealing cover 87. A filter screen 12 is fixed inside the filter box 11. An air suction pipe 13 is fixedly inserted into the top of the filter box 11. A hollow adsorption plate 14 connected to the air suction pipe 13 is fixed inside the feed hopper 3. Several dust suction holes 15 are opened on the side wall of the hollow adsorption plate 14. The air suction end of the air pump 91 is connected to the inside of the filter box 11. The filter screen 12 is placed between the air suction end of the air pump 91 and the air suction pipe 13. An opening is provided at the bottom of the filter box 11. A bottom cover is sealed at the opening to facilitate cleaning of the dust collected inside the filter box 11.

[0038] The air supply pipe 92 is a three-way pipe. One of the air outlets of the air supply pipe 92 is connected to the connecting hose 93. Both air outlets of the air supply pipe 92 are equipped with an electric control valve 16 that is electrically connected to the controller 2. This valve can directly discharge the gas output by the air pump 91 during the dust collection process, preventing the gas from being ejected through the jet hole 94 and accelerating the dispersion of the crushed dust.

[0039] The operating principle of this invention is explained as follows: The plastic part to be crushed is fed into the feed hopper 3. The plastic part then slides from the feed hopper 3 to the main crushing roller 4 and the auxiliary crushing roller 5 on one side. During the crushing operation, the controller 2 controls the first motor 66 to operate. The first motor 66 drives the main crushing roller 4 to rotate. At this time, under the transmission action of the belt drive assembly 62, the drive shaft 61 drives the drive gear 63 to rotate synchronously. The drive gear 63 drives the driven gear 64 on the same side to rotate. Since the driven gears 64 at the roller shafts of two adjacent auxiliary crushing rollers 5 mesh with each other, each auxiliary crushing roller 5 will rotate synchronously with the main crushing roller 4. At this time, under the rotation action of the main crushing roller 4 and the auxiliary crushing roller 5 at the feed hopper 3, the plastic part will be crushed and bitten into the feed hopper 3. Between the main crushing roller 4 and the auxiliary crushing roller 5, some plastic parts will enter between the two auxiliary crushing rollers 5 in the same group, while the other part of the plastic parts will move to the next group of auxiliary crushing rollers 5 under the rotation of the main crushing roller 4. Then, a part of the plastic parts will be separated again and enter between the auxiliary crushing rollers 5 in this group until the plastic parts pass the tail auxiliary crushing roller 5. Since the axial distance between the auxiliary crushing roller 5 and the main crushing roller 4 gradually decreases, the degree of crushing of the plastic parts will continuously increase. Moreover, since the auxiliary crushing roller 5 surrounds the outside of the main crushing roller 4, the crushing movement distance of the plastic parts is very short. Through the highly integrated crushing structure design, not only can multi-stage crushing of plastic parts be completed, but the crushing efficiency of plastic parts can also be improved, and the overall size of the equipment can be reduced, thus reducing space occupation.

[0040] The crushed plastic parts fall onto the curved plate 72. Plastic particles that meet the particle size requirements fall directly through the screening holes 73, while those that do not meet the requirements remain on the curved plate 72. The controller 2 controls the second motor 88 to operate once at regular intervals (this interval can be preset by the controller 2). The second motor 88 drives the strip plate 82 to rotate via the drive shaft 81. The strip plate 82 drives the hollow scraper 85 to move along the inner side wall of the circular box 1 and the inner arc surface of the curved plate 72 via the slide rod 83. When the hollow scraper 85 moves to the curved plate 72, the plastic particles remaining above the curved plate 72 are scraped away by the hollow scraper 85. Subsequently, the hollow scraper 85 pushes the plastic particles into the interior of the curved guide plate 86. The curved guide plate 86 prevents the plastic particles from slipping off the hollow scraper 85. When the hollow scraper 85 moves to the discharge end of the curved guide plate 86, the hollow scraper... Under the pushing action of 85, the plastic particles will push the baffle plate 10 to one side. At this time, the plastic particles will slide back to the top of the main crushing roller 4 and, under the rotation of the main crushing roller 4, re-enter between the main crushing roller 4 and the auxiliary crushing roller 5. This allows for secondary crushing of plastic particles that do not meet the particle size requirements until the plastic particles fall from the screening hole 73 (wherein, the arc plate 72 and the discharge hopper 71 are detachable, and the arc plate 72 with a suitable hole diameter can be replaced as needed). After the hollow scraper plate 85 moves to the discharge end of the arc guide plate 86, the controller 2 controls the second motor 88 to stop working and controls the second motor 88 to rotate. At this time, the hollow scraper plate 85 moves back synchronously, and the baffle plate 10 rotates back to its original position under the action of gravity. At the same time, during the process of the hollow scraper plate moving back, the plastic particles that fall on the arc plate 72 are pushed again by the hollow scraper plate 85 and finally slide down to the auxiliary crushing roller 5 at the feed hopper 3.

[0041] Secondly, during the movement of the hollow scraper plate 85, the controller 2 controls the air pump 91 to operate, and controls the electric control valve 16 near the connecting hose 93 to open, and controls the electric control valve 16 on the other side to close. At this time, the airflow delivered by the air pump 91 enters the connecting hose 93 through the air supply pipe 92, and is finally ejected through the jet hole 94 on the end face of the hollow scraper plate 85. The jetting airflow blows against the screening hole 73, which can push out plastic particles that may be stuck in the screening hole 73, thereby minimizing the risk of clogging of the screening hole 73. At the same time, during the movement of the hollow scraper plate 85... During the interval when the movement stops, the controller 2 controls the air pump 91 to keep working and controls the electric control valve 16 on the side near the connecting hose 93 to close, and controls the electric control valve 16 on the other side to open. At this time, the air pump 91's suction end will generate negative pressure suction through the filter box 11 and the suction pipe 13 to the dust suction hole 15 at the hollow adsorption plate 14, thereby adsorbing the dust that floats upward during crushing into the filter box 11. Under the action of the filter screen 12, the dust is trapped in the filter box 11, thereby minimizing the dust escape during crushing. The dust in the filter box 11 can be cleaned periodically.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric bicycle plastic injection molding waste crushing recycling device, comprising a circular box (1) and a controller (2) arranged on one side of the circular box (1), and a feeding hopper (3) is arranged on the top of the circular box (1), characterized in that, Also includes: The main crushing roller (4) is rotatably positioned at the center of the interior of the circular housing (1); Multiple sets of auxiliary crushing rollers (5) are arranged in a ring outside the main crushing roller (4), and the interaxial distance between the multiple sets of auxiliary crushing rollers (5) and the main crushing roller (4) gradually decreases in the counterclockwise direction; The drive unit (6) is installed on the side wall of the circular box (1), and the drive unit (6) drives the main crushing roller (4) and the auxiliary crushing roller (5) to rotate. The discharge unit (7) is installed at the discharge port of the circular box (1), and the discharge unit (7) is used to screen plastic particles; The return unit (8) is located inside the circular box (1). The return unit (8) is used to push the plastic particles back to the feed end of the main crushing roller (4) and the auxiliary crushing roller (5).

2. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 1, characterized in that, The drive unit (6) includes a drive shaft (61) rotatably mounted on the side wall of the circular housing (1). The drive shaft (61) is connected to the roller shaft of the main crushing roller (4) via a belt drive assembly (62). A drive gear (63) is fixed at the shaft end of the drive shaft (61). A driven gear (64) is fixed at the end of the roller shaft of each of the auxiliary crushing rollers (5). Two adjacent driven gears (64) mesh with each other. The drive gear (63) meshes with the driven gear (64) on the same side. A detachable mounting cover (65) is installed on the outer side wall of the circular housing (1). A first motor (66) is fixed on the side wall of the mounting cover (65). The drive end of the first motor (66) is connected to the roller shaft of the main crushing roller (4). The first motor (66) is electrically connected to the controller (2).

3. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 1, characterized in that, The discharge unit (7) includes a discharge hopper (71) that can be detachably installed at the discharge port of the circular box (1). A detachable arc plate (72) is installed inside the discharge hopper (71), and the inner arc surface of the arc plate (72) smoothly transitions with the inner side wall of the circular box (1). Several screening holes (73) are opened on the surface of the arc plate (72).

4. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 1, characterized in that, The return unit (8) includes a drive shaft (81) rotatably mounted on the side wall of a circular box (1). A strip plate (82) is fixedly connected to the shaft wall of the drive shaft (81). A slide rod (83) is fixed to the side wall of the strip plate (82). A C-shaped through hole (84) matching the slide rod (83) is opened on the side wall of the circular box (1). A hollow scraper plate (85) is slidably connected to the inner side wall of the circular box (1). One end of the slide rod (83) away from the strip plate (82) passes through the C-shaped through hole (84) and connects with the hollow scraper plate (85). 5) is fixedly connected to the end. The inner side of the circular box (1) away from the hollow scraper (85) is fixed with an arc-shaped guide plate (86) located outside the auxiliary crushing roller (5). The outer side wall of the circular box (1) is fixed with a sealing cover (87). The side wall of the sealing cover (87) is fixed with a second motor (88). The driving end of the second motor (88) is connected to the drive shaft (81). The second motor (88) is electrically connected to the controller (2). The side wall of the sealing cover (87) is fixed with an air injection anti-blocking mechanism (9).

5. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 4, characterized in that, The air injection anti-blocking mechanism (9) includes an air pump (91) fixed to the side wall of the sealing cover (87). The output end of the air pump (91) is fixed with an air supply pipe (92) that penetrates the side wall of the sealing cover (87). The air supply pipe (92) is fixedly connected to a connecting hose (93), and the connecting hose (93) is connected to the interior of the hollow scraper (85). The hollow scraper (85) has several air jet holes (94) at one end near the circular box (1). The air pump (91) is electrically connected to the controller (2).

6. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 4, characterized in that, A baffle plate (10) is provided on one side of the discharge end of the arc-shaped guide plate (86), and the baffle plate (10) is hinged to the inner wall of the feed hopper (3).

7. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 5, characterized in that, A filter box (11) is fixed to the outer wall of the sealing cover (87), a filter screen (12) is fixed inside the filter box (11), an air suction pipe (13) is fixedly inserted into the top of the filter box (11), a hollow adsorption plate (14) connected to the air suction pipe (13) is fixed inside the feed hopper (3), and a number of dust suction holes (15) are opened on the side wall of the hollow adsorption plate (14). The air suction end of the air pump (91) is connected to the inside of the filter box (11), and the filter screen (12) is arranged between the air suction end of the air pump (91) and the air suction pipe (13).

8. The waste crushing and recycling device for plastic injection molded parts of electric bicycles according to claim 5, characterized in that, The gas supply pipe (92) is a three-way pipe. One of the gas outlets of the gas supply pipe (92) is connected to the connecting hose (93). Both gas outlets of the gas supply pipe (92) are equipped with an electric control valve (16) that is electrically connected to the controller (2).

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