Plastic product production waste recycling device

Abstract

The present invention relates to the field of plastic recycling technology, and specifically to a device for recycling waste from the production of plastic products. The present invention comprises: a mounting frame, on which an anti-blocking cutting module is provided; the anti-blocking cutting module comprises: a second motor, the output end of the second motor is provided with a driving gear, the driving gear is connected to a second transmission belt, the second transmission belt is connected to a second driven gear, the second driven gear is coaxially connected to a swing rod, the other end of the swing rod is hinged to a slider, the slider is slidably mounted on a cutting rod, the bottom end of the cutting rod is connected to a cutting head; the present application can intermittently cut the plastic waste at the feed port while pressing the cut waste downward to the crushing module, which can both prevent blockage and improve crushing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic recycling, and in particular to a device for recycling waste from production of plastic products. Background Art

[0002] During the PC board production process, the raw materials are first prepared, dried and dehumidified, melted and plasticized in an extruder, extruded and formed, cooled and shaped, and then pulled and cut. This produces a large amount of scrap and plastic waste. If these plastic scraps and plastic waste are directly discarded, it will waste resources and increase the processing cost of plastic products. Therefore, they need to be processed and recycled. Due to the different shapes of plastic waste, the plastic waste is placed in a disorderly manner when it is loaded into the loading port of the feeding equipment. As the loading port slides to the feed port of the pulverizing module, some long plastic waste can easily get stuck in the feed port of the pulverizing module, resulting in poor feeding of the pulverizing module and affecting the efficiency of plastic waste recycling.

[0003] The invention with application number CN202410712789.7 provides a plastic waste recycling and processing equipment, which relates to the field of plastic waste processing technology. The plastic waste recycling and processing equipment includes a processing body, and the end portion on the right side of the processing body is connected to a conveying channel. The end portion of the inner cavity of the processing body is provided with a feeding and guiding assembly for pre-crushing and combing the plastic. The right side of the processing body is provided with a material guiding assembly, and the right side of the processing body is provided with a material pushing and anti-blocking assembly that cooperates with the conveying channel. With the cooperation of the material guiding assembly, the material pushing and anti-blocking assembly and the material diverting and guiding assembly, the above scheme can reasonably and quantitatively feed the plastic into the conveying channel, and by utilizing the characteristics between the material pushing and anti-blocking assembly and the material diverting and guiding assembly, the material above the conveying channel can be pushed regularly, so that it can be stably and quantitatively transported to the processing body for processing, thereby avoiding the problem of easy shutdown and cleaning of the crushing assembly due to blockage.

[0004] However, this patent cannot cut off the plastic waste at the feed inlet. When the plastic waste is long, it may get stuck at the feed inlet, causing blockage.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a plastic product production waste recycling device that can effectively solve the above technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical solutions are adopted:

[0008] A plastic product production waste recycling device comprises: a mounting frame, on which an anti-blocking cutting module is provided;

[0009] The anti-blocking cutting module includes: a second motor, a driving gear is installed at the output end of the second motor, the driving gear is connected to the second transmission belt, the second transmission belt is connected to the second driven gear, the second driven gear is coaxially connected to a swing rod, the other end of the swing rod is hinged to a slider, the slider is slidably installed on the cutting rod, and the bottom end of the cutting rod is connected to the cutting head.

[0010] Furthermore, the driving gear is transmission-connected to a first driven gear, the first driven gear is transmission-connected to a rack, the bottom of the rack is connected to a connecting rod, the bottom of the connecting rod is hinged to a pressure plate; an extrusion block is slidably connected to the connecting rod.

[0011] Furthermore, the driving gear is connected to a first driven gear; the first driven gear is also coaxially connected to a first half gear; the first driven gear is also connected to a third driven gear; the third driven gear is coaxially connected to a second half gear.

[0012] Furthermore, a crushing module is provided below the anti-blocking and cutting module; the crushing module includes: a first motor mounted on an inclined frame of a bracket, a driving wheel connected to the output end of the first motor, a driven wheel connected to the driving wheel, a crushing member connected to the driven wheel, and the crushing member is mounted on the mounting frame.

[0013] Furthermore, a grading and screening module is provided below the crushing module; the grading and screening module comprises: a third motor, an output end of the third motor is provided with a wave member, and the wave member is transmission-connected with a coarse screen plate and a fine screen plate.

[0014] Furthermore, the waving member includes: an eccentric wheel transmission-connected to the output end of the third motor, a waving member installed on the eccentric wheel, a sliding block slidingly connected to the eccentric wheel, a hinged rod slidingly connected to the sliding block, a guide block slidingly connected to the hinged rod, and the guide block is fixedly mounted on the mounting frame.

[0015] Furthermore, the corrugated member is an inclined annular structure, and a first annular groove is provided in the middle of the annular structure, the first annular groove is slidably connected to a sliding rod, and the other end of the sliding rod is connected to the fine screen plate; an annular block is installed on the sliding rod, and a second annular groove is provided on the annular block, and a telescopic rod is installed inside the second annular groove, and a ball is rollingly installed on the other end of the telescopic rod.

[0016] Furthermore, first springs are installed at both ends of the coarse screen plate on a side close to the undulating member, and second springs are installed at both ends of the coarse screen plate on a side away from the undulating member.

[0017] Furthermore, the length of the first spring is greater than that of the second spring.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the present invention can intermittently cut off the plastic waste at the feed port and press the cut waste down to the crushing module, which can prevent blockage and improve the crushing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] Figure 1 This is an isometric view of a device for recycling waste from plastic product production according to the present invention;

[0021] Figure 2 This is a structural schematic diagram of a plastic product production waste recycling device according to the present invention;

[0022] Figure 3 This is a schematic diagram of a plastic product production waste recycling device according to the present invention;

[0023] Figure 4 This is a schematic diagram of a crushing module of a plastic product production waste recycling device according to the present invention;

[0024] Figure 5 This is a structural schematic diagram of an anti-blocking and cutting module of a plastic product production waste recycling device according to the present invention;

[0025] Figure 6 This is a schematic diagram of an anti-blocking and cutting module of a plastic product production waste recycling device according to the present invention;

[0026] Figure 7 A schematic diagram of the first half of the gear transmission portion of a plastic product production waste recycling device according to the present invention;

[0027] Figure 8 This is a schematic structural diagram of the first half gear transmission portion of a plastic product production waste recycling device of the present invention;

[0028] Figure 9 This is a structural schematic diagram of a third motor and a ripple member of a plastic product production waste recycling device according to the present invention;

[0029] Figure 10 A schematic diagram of a third motor and a pulsating member of a plastic product production waste recycling device according to the present invention;

[0030] Figure 11 This is a schematic diagram of a grading and screening module of a plastic product production waste recycling device according to the present invention;

[0031] Figure 12 This is a structural schematic diagram of a grading and screening module of a plastic product production waste recycling device according to the present invention;

[0032] Figure 13 This is a schematic structural diagram of a wave component of a plastic product production waste recycling device according to the present invention;

[0033] Figure 14 This is a structural schematic diagram of a sliding rod of a plastic product production waste recycling device of the present invention.

[0034] In the figure: 1. Mounting frame; 11. Bracket; 12. Feed hopper; 2. Crushing module; 21. First motor; 22. Driving wheel; 23. Driven wheel; 24. Belt; 25. Crushing element; 26. Screen; 3. Anti-blocking cutting module; 301. Second motor; 302. Housing; 303. Driving gear; 304. First driven gear; 305. Second driven gear; 306. First transmission belt; 307. Second transmission belt; 308. Swing rod; 309. Slider; 310. Cutting rod; 311. Cutting head; 312. Rack; 313. Connecting rod; 314. Extrusion block; 315. Press Plate; 316, hinge shaft; 317, limit block; 318, first half gear; 319, third driven gear; 320, second half gear; 4, graded screening module; 41, third motor; 42, waving piece; 43, coarse screen plate; 44, fine screen plate; 45, first spring; 46, second spring; 421, eccentric wheel; 422, waving piece; 423, sliding block; 424, hinged rod; 425, guide block; 4221, first annular groove; 4222, sliding rod; 4223, annular block; 4224, ball; 4225, telescopic rod; 42231, second annular groove; 5, fan. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0036] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] like Figures 1 to 14 As shown, the present invention is a plastic product production waste recycling device, including: a mounting frame 1; the mounting frame 1 includes: a bracket 11, a crushing module 2 installed on the bracket 11, and a feed hopper 12 installed on the top of the crushing module 2; the bracket 11 is composed of a square frame and an inclined frame installed on one side of the square frame.

[0038] The crushing module 2 includes: a first motor 21 installed on the inclined frame of the bracket 11, a driving wheel 22 connected to the output end of the first motor 21, a driven wheel 23 connected to the driving wheel 22 through a belt 24, and a crushing piece 25 connected to the driven wheel 23. The crushing piece 25 is installed on the square frame, and a screen 26 is set on the discharge side of the crushing piece 25; when the plastic scraps need to be recycled, the plastic scraps are put into the hopper 12, and the plastic scraps slide from the hopper 12 to the crushing piece 25, so that the plastic scraps are crushed in the process of the first motor 21 driving the crushing piece 25 to rotate, and the crushed plastic particles fall through the screen 26.

[0039] A fan 5 is provided at the discharge end of the crushing module 2 for blowing the crushed plastic particles into a collection box (not shown). The collection box is a conventional container placed on the side of the mounting frame 1 for receiving materials.

[0040] An anti-blocking cutting module 3 is also provided inside the bracket 11. Since plastic waste comes from a wide range of sources and has various shapes, the plastic waste transported to the feeding port through feeding equipment or manually is often placed in a disorderly manner; especially when longer plastic waste appears, it is easy to get stuck at the feeding port of the crushing module 2. This blockage will cause the crushing module 2 to feed poorly, thereby affecting the overall efficiency of plastic waste recycling.

[0041] The anti-blocking and cutting module 3 includes: a second motor 301 mounted on top of the feed hopper 12, and a housing 302. The housing 302 has a through hole on the side facing the second motor 301, allowing the output shaft of the second motor 301 to pass through the housing 302 and connect with components disposed within the housing 302. A driving gear 303 is mounted on the output end of the second motor 301, and the driving gear 303 is located within the housing 302. The driving gear 303 is connected to a first driven gear 304 via a first transmission belt 306. The first driven gear 304 is meshed with a rack 312. The bottom of the rack 312 is connected to a connecting rod 313, and the bottom of the connecting rod 313 is connected to a hinge shaft 316. A pressure plate 315 is symmetrically hinged on both sides of the hinge shaft 316. A torsion spring is provided between the hinge shaft 316 and the pressure plate 315, ensuring that the pressure plate 315 is horizontal in its natural state.

[0042] A limiting block 317 or other limiting structure may be provided above the pressing plate 315 so that the pressing plate 315 cannot further deflect upward after being in a horizontal position.

[0043] The connecting rod 313 is also slidably connected to an extrusion block 314, which consists of a sliding portion slidably connected to the connecting rod 313, a pressing portion arranged on the sliding portion and bent outward and then downward, and a connecting portion installed on the sliding portion, and the connecting portion is connected to the inner wall of the feed hopper 12; when the pressure plate 315 slides upward, it contacts the pressing portion, and since the connecting portion of the extrusion block 314 is fixed on the inner wall of the feed hopper 12, the pressure plate 315 deflects downward, so that the plastic waste on the pressure plate 315 falls onto the crushing piece 25, so that it can be crushed; when the pressure plate 315 moves downward and separates from the extrusion block 314, the torsion spring drives the pressure plate 315 to return to a horizontal posture.

[0044] Optionally, the top surface of the pressing plate 315 can be configured as an arc-shaped surface to reduce the possibility of accumulation of plastic waste and facilitate the falling of plastic waste.

[0045] The driving gear 303 is also transmission-connected to the second transmission belt 307, and the second transmission belt 307 is transmission-connected to the second driven gear 305. The second driven gear 305 is coaxially connected to a swing rod 308, and the other end of the swing rod 308 is hinged to a slider 309. The slider 309 is slidably mounted on the cutting rod 310, and the top of the cutting rod 310 is rotatably mounted on the lower side of the shell 302, and the bottom end of the cutting rod 310 is rotationally connected to the cutting head 311; the driving gear 303 and the first driven gear 304 can be optionally a double gear or a transmission pulley; the first transmission belt 306 and the second transmission belt 307 can be a chain or a transmission belt; the cutting rod 310 can be optionally a cutting rod 310 whose bottom can be rotated toward the crushing module 2, so that it is divided into two ends hinged to each other, and a torsion spring is set in the middle to reset it, which can prevent the plastic waste from being pushed to the outside when the cutting rod 310 rotates outward.

[0046] When the second motor 301 is started, the second motor 301 drives the driving gear 303 to rotate, thereby driving the first driven gear 304 and the second driven gear 305 to rotate respectively. When the second driven gear 305 rotates, it drives the swing rod 308 to swing back and forth, thereby driving the slider 309 to slide up and down along the cutting rod 310, thereby driving the cutting rod 310 to swing back and forth between the entrance of the feed hopper 12 and the inside of the feed hopper 12, thereby cutting or breaking off the plastic waste accumulated at the entrance of the feed hopper 12 during the swinging process, so that the plastic waste can easily enter the crushing module 2 from the feed hopper 12 for crushing; at the same time, the driving gear 303 drives the first driven gear 304 to rotate, thereby driving the pressing plate 315 upward or downward. Slide downward. When the pressure plate 315 slides downward, the plastic waste is pressed onto the crushing piece 25, thereby reducing the possibility that the plastic waste that is still large after partial cutting is difficult to enter the crushing piece 25 for crushing; when the pressure plate 315 slides upward, the extrusion block 314 causes the pressure plate 315 to deflect downward during the sliding process, thereby allowing the plastic waste that falls on the pressure plate 315 to slide off; as a supplement, in this embodiment, the pressure plate 315 can be driven to rise and fall by the forward and reverse rotation of the second motor 301; secondly, the gear size of the driving gear 303, the first driven gear 304, and the second driven gear 305 can be designed so that the pressure plate 315 moves up and down once when the cutting rod 310 swings back and forth once or multiple times.

[0047] The cutting rod 310 cooperates with the swing rod 308 and the slider 309 to cut off the long plastic waste or irregularly shaped plastic waste accumulated at the entrance of the hopper 12 by swinging back and forth. The cutting action makes the length of the plastic waste suitable for entering the crushing module 2, avoiding the plastic waste from being stuck at the feed inlet due to being too long; since the sources of plastic waste are wide and the shapes are different, the cutting rod 310 can cut or break off the plastic waste according to the different shapes of the plastic waste, thereby enhancing the adaptability of the equipment to different forms of plastic waste. The extrusion block 314 is fixed to the connection part of the inner wall of the feed hopper 12. When the extrusion block 314 presses the plastic waste, the pressing part forcibly presses the plastic waste onto the crushing piece 25, thereby avoiding the accumulation or retention of plastic waste above the crushing piece 25, so that the plastic waste can enter the crushing module 2 faster for subsequent crushing processing. Some plastic waste may be stuck in the feed hopper 12 due to inappropriate size or complex shape, especially longer plastic waste. The pressing action of the extrusion block 314 can effectively push these plastic wastes toward the crushing piece 25, reducing the jamming of plastic waste due to irregular shape, thereby reducing the probability of equipment blockage. It can be seen from the above description that when the plastic waste is accumulated at the entrance of the feed hopper 12 due to being too long or irregular in shape, the cutting rod 310 cuts the plastic waste into appropriate lengths by swinging back and forth, so that it can smoothly pass through the feed port and enter the crushing module 2; when the plastic waste is cut or set aside, the extrusion block 314 will push the plastic waste down toward the crushing piece 25, accelerating the crushing process of the plastic waste. The synergistic effect of the two can ensure that the waste forms an orderly flow before entering the crushing module 2, avoiding the accumulation or jamming of the waste at the feed port.

[0048] Optional, such as Figures 7 and 8 As shown, the first driven gear 304 is also coaxially connected to the first half gear 318, the first driven gear 304 is transmission-connected to the third driven gear 319, and the third driven gear 319 is coaxially connected to the second half gear 320, wherein the first driven gear 304 and the third driven gear 319 are staggered with the rack 312 and are not engaged with the rack 312; the first half gear 318 and the second half gear 320 are alternately engaged with the rack 312, and since the first driven gear 304 is transmission-connected to the third driven gear 319, the first driven gear 304 and the third driven gear 319 are transmission-connected. The third driven gear 319 rotates in the opposite direction, so when the first half gear 318 and the second half gear 320 are alternately engaged with the rack 312, the rack 312 is driven to move upward or downward intermittently, thereby driving the pressure plate 315 to perform up and down reciprocating motion. The advantage of this design is that there is no need to switch the rotation direction of the output end of the second motor 301. It only needs to start the second motor 301 to drive the cutting head 311 to intermittently cut the plastic waste while driving the pressure plate 315 to intermittently press the plastic waste down and make the plastic waste slide off the pressure plate 315.

[0049] A grading and screening module 4 is also provided below the crushing module 2, and the grading and screening module 4 is mounted on the bracket 11; a motor mounting plate is mounted on the outer side of the bracket 11, and a third motor 41 is mounted on the motor mounting plate, and the output end of the third motor 41 passes through the outer wall of the bracket 11 and extends into the interior of the bracket 11; a waving member 42 is mounted on the output end of the third motor 41, and the waving member 42 is respectively connected to a coarse screen plate 43 and a fine screen plate 44, and the fine screen plate 44 is slidably mounted on the inner side of the bracket 11; when the third motor 41 rotates, the coarse screen plate 43 and the fine screen plate 44 are driven to swing back and forth through the waving member 42.

[0050] The waving member 42 includes: an eccentric wheel 421 that is transmission-connected to the output end of the third motor 41, a waving member 422 installed on the side of the eccentric wheel 421 away from the third motor 41, a sliding block 423 is slidably connected to the outer side of the eccentric wheel 421, and the upper and lower sides of the sliding block 423 are connected to a hinged rod 424, and the hinged rod 424 is slidably connected to a guide block 425. The guide block 425 is fixedly installed on the bracket 11 and is used to limit the sliding block 423 through the guide block 425 so that the sliding block 423 can only slide up and down; the upper hinged rod 424 is hinged to one end of the coarse screen plate 43. Optionally, the upper hinged rod 424 can be set as a retractable hinged rod 424, and a spring can be set inside it.

[0051] The wave-shaped member 422 is an inclined annular structure, and a first annular groove 4221 is provided in the middle of the annular structure. A sliding rod 4222 is slidably connected to the first annular groove 4221. The side of the sliding rod 4222 close to the first annular groove 4221 is a telescopic rod 4225. A rolling ball or roller is installed at the end of the telescopic rod 4225 to reduce friction. The side away from the first annular groove 4221 is a non-telescopic straight rod. An annular block 4223 is installed on the sliding rod 4222. The annular block 4223 is provided on the sliding rod 4222. A second annular groove 42231 is provided on the top, and a telescopic rod 4225 is installed inside the second annular groove 42231. A ball 4224 is rolled on one end of the telescopic rod 4225 located in the second annular groove 42231; the other end of the sliding rod 4222 is connected to the fine screen plate 44; through the design of the sliding rod 4222, the sliding rod 4222 can always slide along the path of the first annular groove 4221. During the sliding process, due to the shape of the wave-shaped member 422, the annular block 4223 The eccentric wheel 421 is intermittently approached or moved away from the sliding rod 422, so that the sliding rod 4222 swings back and forth laterally, thereby driving the fine screen plate 44 to swing back and forth laterally; optionally, the corrugated member 422 and the eccentric wheel 421 can be set with different axes, so that the corrugated member 422 can drive the fine screen plate 44 to swing back and forth laterally while also shaking up and down, thereby improving the screening effect; through the cooperation of the screen 26, the coarse filter and the fine filter, the crushed plastic particles can be better screened, and particles of different particle sizes can be separated. The particle size of the waste material can be efficiently separated, and particles of different particle sizes will be sent to different recycling systems; for example, the waste particles filtered by the coarse filter enter the return box from the discharge port of the mounting frame 1, and are then poured back into the hopper 12 from the return box, and are crushed for the second time by the crushing module 2, and the waste particles filtered by the fine filter can be further processed or recycled, thereby ensuring the purity and quality of the waste recycling, improving the reuse value and improving the effect of subsequent reuse.

[0052] First springs 45 are installed at both ends of the coarse screen plate 43 close to the wave member 42, and second springs 46 are installed at both ends of the coarse screen plate 43 away from the wave member 42. The length of the first spring 45 is greater than that of the second spring 46, so that the coarse screen plate 43 is inclined; through the setting of the first spring 45 and the second spring 46, not only can a buffering effect be played and the swinging be enhanced, but also the impact force of the buffer screen plate during vibration can be reduced, so that the swinging of the screen plate is more stable, avoiding excessive vibration causing damage to the screen 26 or uneven screening, and can also make the plastic waste move to the side of the second spring 46 during the swinging process, so as to facilitate the discharge of large-particle waste screened out from the side of the second spring 46.

[0053] Optionally, a weighing device is installed at the bottom inner side of the hopper 12. When the weight measured by the weighing device exceeds a threshold value, the second motor 301 is started to avoid energy waste caused by continuous operation.

[0054] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0055] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A plastic product production waste recycling device, characterized in that: include: A mounting frame, wherein the mounting frame is provided with an anti-blocking and cutting module; The anti-blocking cutting module includes: a second motor, an output end of the second motor is equipped with a driving gear, the driving gear is connected to a second transmission belt, the second transmission belt is connected to a second driven gear, the second driven gear is coaxially connected to a swing rod, the other end of the swing rod is hinged to a slider, the slider is slidably mounted on a cutting rod, and the bottom end of the cutting rod is connected to a cutting head; A crushing module is provided below the anti-blocking and cutting module, and a feeding hopper is installed on the top of the crushing module.

2. A plastic product production waste recycling device according to claim 1, characterized in that: The driving gear is transmission-connected with a first driven gear, and the first driven gear is transmission-connected with a rack; the bottom of the rack is connected with a connecting rod, and the bottom of the connecting rod is hinged with a pressure plate; the connecting rod is slidably connected with an extrusion block.

3. The plastic product production waste recycling device according to claim 1, characterized in that: The driving gear is connected to the first driven gear; the first driven gear is also coaxially connected to the first half gear; the first driven gear is also connected to the third driven gear; the third driven gear is coaxially connected to the second half gear; The bottom of the rack is connected to a connecting rod, and the bottom of the connecting rod is hinged with a pressure plate; the connecting rod is slidably connected to an extrusion block; The first driven gear and the third driven gear are staggered with the rack and are not engaged with the rack; the first half gear and the second half gear are alternately engaged with the rack.

4. A plastic product production waste recycling device as claimed in claim 2 or 3, characterized in that: The crushing module includes: a first motor mounted on an oblique frame of a bracket, a driving wheel drivingly connected to the output end of the first motor, a driven wheel drivingly connected to the driving wheel, a crushing member drivingly connected to the driven wheel, and the crushing member is mounted on the mounting frame.

5. The plastic product production waste recycling device according to claim 4, characterized in that: A grading and screening module is further provided below the crushing module; the grading and screening module comprises: a third motor, an output end of which is provided with a wave member, and the wave member is transmission-connected with a coarse screen plate and a fine screen plate.

6. A plastic product production waste recycling device as claimed in claim 5, characterized in that: The waving member includes: an eccentric wheel transmission-connected to the output end of the third motor, a wavy member installed on the eccentric wheel, a sliding block slidingly connected to the eccentric wheel, a hinged rod slidingly connected to the sliding block, and a guide block slidingly connected to the hinged rod, wherein the guide block is fixedly mounted on the mounting frame.

7. A plastic product production waste recycling device as claimed in claim 6, characterized in that: The corrugated member is an inclined annular structure, and a first annular groove is provided in the middle of the annular structure, the first annular groove is slidably connected to a sliding rod, and the other end of the sliding rod is connected to the fine screen plate; an annular block is installed on the sliding rod, and a second annular groove is provided on the annular block, and a telescopic rod is installed inside the second annular groove, and a ball is rollingly installed on the other end of the telescopic rod.

8. The plastic product production waste recycling device according to claim 7, characterized in that: Two ends of the coarse screen plate close to the undulating member are installed with first springs, and two ends of the coarse screen plate away from the undulating member are installed with second springs.

9. The plastic product production waste recycling device according to claim 8, characterized in that: The first spring is longer than the second spring.

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