Recycling equipment and plastic fragment vibration screening recovery method

Abstract

This invention relates to the field of plastic recycling and screening technology, and discloses a recycling processing equipment and a method for vibrating screening of plastic fragments. Plastic fragments are fed into a screening cylinder from above, and the cylinder is started to rotate. As the cylinder rotates and is tilted, the plastic fragments slide down and are screened. The screened plastic fragments fall into the machine body, and then slide into the first discharge chute for discharge, while the plastic fragments in the machine body slide into the second discharge chute for discharge. Simultaneously, the rotation of the screening cylinder drives the crankshaft to rotate, which in turn drives the inserts to move up and down reciprocally, inserting them back and forth into the screen holes of the screening cylinder. This prevents the plastic fragments from clogging the screen holes, thus cleaning the screen holes in real time during the screening process, ensuring the screening quality of the cylindrical screen, preventing excessive clogging that reduces screening efficiency, and improving the stability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of plastic recycling and screening technology, specifically to a recycling processing equipment and a recycling method for plastic fragments by vibrating screening. Background Art

[0002] The working part of a cylindrical screen is cylindrical, and the entire screen rotates around the axis of the cylinder, which is usually installed at a small angle. Cylindrical screens operate at very low speeds, are stable, and have good dynamic balance. They utilize the relative motion between the granular material and the screen surface to allow some particles to pass through the screen openings, separating the material into different grades according to particle size. They are also commonly used for removing impurities.

[0003] Existing cylindrical screens, such as the Chinese patent application CN114029224A, utilize the combined use of a cylindrical screen, mounting rod, motor, and stirring rod to facilitate material mixing during the downward screening process. This effectively improves the screening efficiency and practicality of the equipment. Furthermore, the inclined design of the cylindrical screen ensures uniform material flow within the screen, reducing material accumulation and preventing poor screening and separation quality. Additionally, the inclusion of a sealing cover, discharge pipe, and burlap sacks facilitates the filtration and collection of impurities and dust generated during material screening. This allows for convenient subsequent cleaning and prevents dust pollution of the processing environment, thereby enhancing the equipment's ease of use and practicality.

[0004] However, the following problems still exist: if the size of the granular material is exactly matched with the screen hole size of the cylindrical screen, most of the granular material will get stuck in the screen hole. At the same time, the cylindrical screen is basically equipped with a vibrating motor. With vibration, the granular material may get stuck tighter and tighter in the screen hole. After long-term operation, the screening capacity of the cylindrical screen will decrease significantly, affecting the normal operation of the cylindrical screen. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a recycling processing device and a recycling method for vibrating screens of plastic fragments. It features real-time cleaning of the screen holes during the screening process, ensuring screening quality, preventing excessive clogging that reduces screening efficiency, and improving equipment stability. This invention solves the problem that when the size of the granular material happens to match the screen hole size, most of the material will get stuck in the screen holes. Furthermore, since most cylindrical screens are equipped with vibrating motors, the material may become increasingly stuck in the screen holes with vibration, leading to a significant decrease in screening capacity and affecting the normal operation of the cylindrical screen after prolonged operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a recycling and processing device, comprising a body, a screening mechanism disposed on the body, and an auxiliary mechanism disposed on the body. The screening mechanism includes a screening cylinder, a first discharge chute, and a second discharge chute. The screening cylinder is rotatably fitted onto the body. The body is inclined, and the axis of the screening cylinder is parallel to the bottom surface of the body. The first discharge chute and the second discharge chute are fixedly installed at the bottom end of the body. The first discharge chute is located above the second discharge chute. The first discharge chute is adjacent to the discharge end of the screening cylinder, and the second discharge chute is opposite to the discharge end of the body.

[0007] The auxiliary mechanism also includes inserts and crankshafts. Multiple inserts are arranged on the machine body in a straight line and are evenly distributed. The inserts are located directly below the screening cylinder, and the straight line of the inserts is parallel to the axis of the screening cylinder. Multiple crankshafts are arranged on the machine body, and each crankshaft is located directly below each insert. Each crankshaft is poweredly connected to its respective crankshaft, so that the crankshaft drives the inserts to move up and down reciprocally. The movement trajectory of the inserts covers the screen holes of the screening cylinder.

[0008] Preferably, the screening mechanism further includes a support frame, which is located below the machine body. The support frame is positioned directly below the machine body and has multiple first telescopic rods. The fixed rods of the first telescopic rods are fixedly connected to the support frame, and the extended rods of the first telescopic rods are fixedly connected to the machine body. Each of the first telescopic rods is fitted with a first spring, one end of which is connected to the fixed rod of the first telescopic rod, and the other end of which is connected to the extended rod of the first telescopic rod.

[0009] Preferably, the top and bottom of the screening cylinder are both open ends, the top of the screening cylinder is the feeding end, and the bottom of the screening cylinder is the discharging end. The inclination angle of the first discharge chute is the same as the inclination angle of the screening cylinder, so that the plastic fragments screened out inside the screening cylinder fall into the first discharge chute. The discharge plane of the second discharge chute is located in the same plane as the bottom surface inside the machine body. The bottom end of the first discharge chute faces one side of the machine body, and the bottom end of the second discharge chute faces the other side of the machine body.

[0010] Preferably, a servo motor is fixedly mounted on the machine body, a traction wheel is fixedly mounted on the shaft of the servo motor, a driven wheel is fixedly mounted on the shaft of the screening cylinder, the traction wheel is located directly below the driven wheel, and a belt is tensioned between the traction wheel and the driven wheel.

[0011] Preferably, a bearing is fitted on the screening cylinder, the inner ring of the bearing is fixedly connected to the screening cylinder, a connecting frame is fixedly installed on the outer ring of the bearing, the connecting frame penetrates the bottom wall of the machine body, the connecting frame is movably fitted with the machine body, there is no gap between the connecting frame and the machine body, the bottom end of the connecting frame is located below the machine body, and a vibration motor is fixedly installed on the bottom end of the connecting frame.

[0012] Preferably, a feeding chute is provided at the top of the machine body, and the top of the feeding chute is connected to the feeder so that the plastic fragments conveyed by the feeder fall into the feeding chute. The bottom end of the feeding chute faces the feeding end of the screening cylinder and is adjacent to the feeding end of the screening cylinder. A fan is fixedly installed on the machine body, and the air outlet of the fan faces the feeding chute. An air guide tube is fixedly installed on the air outlet of the fan and is connected to the air outlet of the fan. The air guide tube faces the feeding chute.

[0013] Preferably, the auxiliary mechanism further includes piston cylinders, and multiple piston cylinders are provided on the machine body. The piston cylinders are evenly distributed in a straight line on the bottom surface of the machine body. A piston rod is slidably fitted on each piston cylinder, and the piston rod passes through the piston cylinder. A second telescopic rod is provided at the top end of each piston rod. The fixed rod of the second telescopic rod is fixedly connected to the piston rod. The insert is fixedly installed on the extension rod of the second telescopic rod. A second spring is sleeved on each second telescopic rod. One end of the second spring is connected to the fixed rod of the second telescopic rod, and the other end of the second spring is connected to the extension rod of the second telescopic rod.

[0014] Preferably, the bottom surface of the machine body is rotatably fitted with a plurality of crankshafts, the crankshafts and the piston rods are arranged in a straight line and uniformly in sequence, and a return frame is provided between each crankshaft and the piston rod. One end of the return frame is rotatably fitted with the bottom end of the piston rod, and the other end of the return frame is rotatably fitted with two adjacent crankshafts, so that the crankshaft as a whole is movably fitted with the other end of each return frame.

[0015] Preferably, pulleys are fixedly installed on one end of the crankshaft and on the shaft of the screening cylinder, with the two pulleys facing each other vertically and a toothed belt tensioned on the two pulleys.

[0016] A method for recycling plastic fragments by vibrating screening uses the aforementioned recycling equipment.

[0017] Compared with the prior art, the present invention provides a recycling and processing device with the following advantages:

[0018] 1. This recycling equipment feeds plastic fragments into a screening cylinder from above. Upon starting the screening cylinder, it rotates. As the cylinder rotates and tilts, the plastic fragments slide down and are screened. The screened fragments fall into the machine body, then slide into the first discharge chute for discharge, and into the second discharge chute for discharge. Simultaneously, the rotation of the screening cylinder drives the crankshaft to rotate, which in turn drives the insert plates to move up and down, inserting them into the screen holes of the screening cylinder. This prevents the plastic fragments from clogging the screen holes, thus cleaning the screen holes in real time during the screening process. This ensures the screening quality of the cylindrical screen, prevents excessive clogging that could reduce screening efficiency, and improves the stability of the equipment.

[0019] 2. This recycling equipment improves the screening efficiency of the screening cylinder by using a vibrating motor to drive the screening cylinder to vibrate while screening plastic fragments, thereby dispersing the accumulation of plastic fragments in the screening cylinder.

[0020] 3. In this recycling and processing equipment, when the insert plate hits the wall of the screening cylinder, the insert plate pushes the second telescopic rod to retract, and the second spring is compressed to protect the insert plate from damage, thus ensuring the stability of the equipment operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure distribution of the body of the present invention;

[0022] Figure 2 This is a schematic diagram of the screening mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the structural distribution at the screening cylinder of the present invention;

[0024] Figure 4 This is a schematic diagram of the structural distribution at the fan section of the present invention;

[0025] Figure 5 This is a schematic diagram of the auxiliary mechanism structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the structural distribution at the insert location of the present invention;

[0027] Figure 7 This is a schematic diagram of the structural distribution at the toothed belt of the present invention;

[0028] Figure 8 This is a schematic diagram of the overall structure of the recycling and processing equipment of the present invention.

[0029] In the diagram: 1. Machine body; 2. Screening mechanism; 21. Support; 22. First telescopic rod; 23. First spring; 24. Screening cylinder; 25. First feeding chute; 26. Second feeding chute; 27. Servo motor; 28. Traction wheel; 29. ​​Driven wheel; 210. Belt; 211. Bearing; 212. Connecting frame; 213. Vibrating motor; 214. Feeding chute; 215. Fan; 216. Air guide tube; 3. Auxiliary mechanism; 31. Piston cylinder; 32. Piston rod; 33. Second telescopic rod; 34. Insert plate; 35. Second spring; 36. Crankshaft; 37. Return frame; 38. Pulley; 39. Toothed belt. Detailed Implementation

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a recycling processing equipment and a recycling method for vibrating screening of plastic fragments.

[0032] Example 1

[0033] In one typical implementation of this application, such as Figure 1 As shown, a recycling and processing device includes a body 1, a screening mechanism 2 disposed on the body 1, and an auxiliary mechanism 3 disposed on the body 1. The screening mechanism 2 includes a screening cylinder 24, a first discharge chute 25, and a second discharge chute 26. The screening cylinder 24 is rotatably fitted on the body 1. The body 1 is inclined, and the axis of the screening cylinder 24 is parallel to the bottom surface of the body 1. The first discharge chute 25 is fixedly installed at the bottom end of the body 1, and the second discharge chute 26 is fixedly installed at the bottom end of the body 1. The first discharge chute 25 is located above the second discharge chute 26. The first discharge chute 25 is adjacent to the discharge end of the screening cylinder 24, and the second discharge chute 26 is opposite to the discharge end of the body 1.

[0034] The auxiliary mechanism 3 also includes inserts 34 and crankshafts 36. Multiple inserts 34 are arranged on the machine body 1. The inserts 34 are evenly distributed in a straight line and are located directly below the screening cylinder 24. The straight line of the inserts 34 is parallel to the axis of the screening cylinder 24. Multiple crankshafts 36 are arranged on the machine body 1. Each crankshaft 36 is located directly below each insert 34. Each crankshaft 36 is powered to drive the inserts 34 to move up and down. The movement trajectory of the inserts 34 covers the screen holes of the screening cylinder 24.

[0035] When using this invention:

[0036] Plastic fragments are fed into the screening cylinder 24 from above. The screening cylinder 24 is then started to rotate. As the screening cylinder 24 rotates and tilts, the plastic fragments slide down and are screened. The screened plastic fragments fall into the machine body 1, and then slide into the first discharge chute 25 for discharge. The plastic fragments in the machine body 1 slide into the second discharge chute 26 for discharge. Simultaneously, the rotation of the screening cylinder 24 drives the crankshaft 36 to rotate, which in turn drives the insert plate 34 to move up and down reciprocally. This causes the insert plate 34 to repeatedly insert into the screen holes of the screening cylinder 24, preventing the plastic fragments from clogging the screen holes. This process cleans the screen holes of the cylindrical screen in real time, ensuring the screening quality, preventing excessive clogging that could reduce screening efficiency, and improving the stability of the equipment.

[0037] Example 2

[0038] like Figures 2-4 As shown, the difference from the above embodiment is that the screening mechanism 2 also includes a support 21. The support 21 is provided below the machine body 1. The support 21 is located directly below the machine body 1. A plurality of first telescopic rods 22 are provided on the support 21. The fixed rod of the first telescopic rod 22 is fixedly connected to the support 21, and the extension rod of the first telescopic rod 22 is fixedly connected to the machine body 1. A first spring 23 is sleeved on each of the first telescopic rods 22. One end of the first spring 23 is connected to the fixed rod of the first telescopic rod 22, and the other end of the first spring 23 is connected to the extension rod of the first telescopic rod 22.

[0039] Furthermore, both the top and bottom of the screening cylinder 24 are open ends. The top of the screening cylinder 24 is the feeding end, and the bottom of the screening cylinder 24 is the discharging end. The inclination angle of the first discharge chute 25 is the same as the inclination angle of the screening cylinder 24, so that the plastic fragments screened out inside the screening cylinder 24 fall into the first discharge chute 25. The discharge plane of the second discharge chute 26 is located in the same plane as the bottom surface inside the machine body 1. The bottom end of the first discharge chute 25 faces one side of the machine body 1, and the bottom end of the second discharge chute 26 faces the other side of the machine body 1.

[0040] Furthermore, a servo motor 27 is fixedly installed on the machine body 1, a traction wheel 28 is fixedly installed on the shaft of the servo motor 27, a driven wheel 29 is fixedly installed on the shaft of the screening cylinder 24, the traction wheel 28 is located directly below the driven wheel 29, and a belt 210 is tensioned on the traction wheel 28 and the driven wheel 29.

[0041] When screening plastic fragments, the servo motor 27 is started, which drives the traction wheel 28 to rotate. The traction wheel 28 drives the belt 210 to rotate, and the belt 210 drives the driven wheel 29 to rotate. The driven wheel 29 drives the screening cylinder 24 to rotate on the machine body 1, so that the screening cylinder 24 screens the plastic fragments. The screened plastic fragments fall into the machine body 1, and then the plastic fragments remaining in the screening cylinder 24 slide into the first discharge chute 25 for discharge. The screened plastic fragments slide from the machine body 1 into the second discharge chute 25 for discharge.

[0042] Furthermore, a bearing 211 is fitted on the screening cylinder 24. The inner ring of the bearing 211 is fixedly connected to the screening cylinder 24. A connecting frame 212 is fixedly installed on the outer ring of the bearing 211. The connecting frame 212 penetrates the bottom wall of the machine body 1. The connecting frame 212 and the machine body 1 are movably fitted together. There is no gap between the connecting frame 212 and the machine body 1. The bottom end of the connecting frame 212 is located below the machine body 1. A vibration motor 213 is fixedly installed on the bottom end of the connecting frame 212.

[0043] During the screening of plastic fragments, the vibration motor 213 is started, which drives the connecting frame 212 to vibrate. The connecting frame 212 drives the bearing 211 to vibrate, and the bearing 211 drives the screening cylinder 24 to vibrate, so as to disperse the accumulation of plastic fragments in the screening cylinder 24, improve the screening efficiency of the screening cylinder 24, and the vibration amplitude of the vibration motor 213 is small, so it cannot affect the movement of the insert 34 into the screen hole of the screening cylinder 24.

[0044] Furthermore, a feeding chute 214 is provided at the top of the machine body 1. The top of the feeding chute 214 is connected to the feeder, so that the plastic fragments conveyed by the feeder fall into the feeding chute 214. The bottom end of the feeding chute 214 faces the feeding end of the screening cylinder 24 and is adjacent to the feeding end of the screening cylinder 24. A fan 215 is fixedly installed on the machine body 1. The air outlet of the fan 215 faces the feeding chute 214. A guide duct 216 is fixedly installed on the air outlet of the fan 215. The guide duct 216 is connected to the air outlet of the fan 215 and faces the feeding chute 214.

[0045] When plastic fragments are fed into the screening cylinder 24, the plastic fragments fall from the conveying equipment into the feeding chute 214. The blower 215 is started, and the blower 215 blows airflow from the air guide duct 216 to the feeding chute 214, so that the airflow blows the plastic fragments in the feeding chute 214. The blown airflow is relatively small, so as to blow out the smaller and lighter impurities in the plastic fragments.

[0046] Example 3

[0047] like Figure 5-Figure 8As shown, the difference from the above embodiment is that the auxiliary mechanism 3 also includes a piston cylinder 31. Multiple piston cylinders 31 are provided on the machine body 1. The piston cylinders 31 are evenly distributed in a straight line on the inner bottom surface of the machine body 1. A piston rod 32 is slidably fitted on each piston cylinder 31. The piston rod 32 passes through the piston cylinder 31. A second telescopic rod 33 is provided at the top of each piston rod 32. The fixed rod of the second telescopic rod 33 is fixedly connected to the piston rod 32. An insert 34 is fixedly installed on the extension rod of the second telescopic rod 33. A second spring 35 is sleeved on each second telescopic rod 33. One end of the second spring 35 is connected to the fixed rod of the second telescopic rod 33, and the other end of the second spring 35 is connected to the extension rod of the second telescopic rod 33.

[0048] Furthermore, multiple crankshafts 36 are rotatably fitted on the bottom surface of the machine body 1. The crankshafts 36 and piston rods 32 are arranged in a straight line and uniformly in sequence. A return frame 37 is provided between each crankshaft 36 and piston rod 32. One end of the return frame 37 is rotatably fitted with the bottom end of the piston rod 32, and the other end of the return frame 37 is rotatably fitted with the two adjacent crankshafts 36, so that the crankshaft 36 as a whole is movably fitted with the other end of each return frame 37.

[0049] Furthermore, pulleys 38 are fixedly installed on one end of the crankshaft 36 and on the shaft of the screening cylinder 24. The two pulleys 38 are opposite each other, and toothed belts 39 are tensioned on the two pulleys 38.

[0050] When cleaning the screen holes of the screening cylinder 24, the rotation of the screening cylinder 24 drives the pulley 38 on the shaft of the screening cylinder 24 to rotate. The pulley 38 drives the toothed belt 39 to rotate. The toothed belt 39 drives the pulley 38 below to rotate. The pulley 38 below drives the crankshaft 36 to rotate. The crankshaft 36 drives the return frame 37 to rotate. The return frame 37 drives the piston rod 32 to move up and down in the piston cylinder 31. The piston rod 32 drives the second telescopic rod 33 to move. The second telescopic rod 33 drives the insert 34 to move, so that the insert 34 is repeatedly inserted into the screen holes of the screening cylinder 24 for cleaning. When the insert 34 hits the wall of the screening cylinder 24, the insert 34 pushes the second telescopic rod 33 to retract, and the second spring 35 is compressed to protect the insert 34 from damage and ensure the stability of the equipment operation.

[0051] The overall working principle of the recycling and processing equipment:

[0052] Plastic fragments are fed into the screening cylinder 24 from above. The screening cylinder 24 is then started to rotate. As the screening cylinder 24 rotates and is tilted, the plastic fragments slide down and are screened. The screened plastic fragments fall into the machine body 1. Then, the plastic fragments in the screening cylinder 24 slide into the first discharge chute 25 and are discharged. The plastic fragments in the machine body 1 slide into the second discharge chute 26 and are discharged. At the same time, the rotation of the screening cylinder 24 synchronously drives the crankshaft 36 to rotate. The crankshaft 36 drives the insert plate 34 to move up and down reciprocally, so that the insert plate 34 reciprocates to insert into the screen holes of the screening cylinder 24. This prevents the plastic fragments from clogging the screen holes of the screening cylinder 24. Thus, the screen holes of the cylindrical screen are cleaned in real time during the screening process, ensuring the screening quality of the cylindrical screen, preventing excessive clogging from reducing screening efficiency, and improving the stability of the equipment.

[0053] When screening plastic fragments, the servo motor 27 is started, which drives the traction wheel 28 to rotate. The traction wheel 28 drives the belt 210 to rotate, and the belt 210 drives the driven wheel 29 to rotate. The driven wheel 29 drives the screening cylinder 24 to rotate on the machine body 1, so that the screening cylinder 24 screens the plastic fragments. The screened plastic fragments fall into the machine body 1, and then the plastic fragments remaining in the screening cylinder 24 slide into the first discharge chute 25 for discharge. The screened plastic fragments slide from the machine body 1 into the second discharge chute 25 for discharge.

[0054] While screening the plastic fragments, the vibration motor 213 is started. The vibration motor 213 drives the connecting frame 212 to vibrate, the connecting frame 212 drives the bearing 211 to vibrate, and the bearing 211 drives the screening cylinder 24 to vibrate, so as to disperse the accumulation of plastic fragments in the screening cylinder 24, improve the screening efficiency of the screening cylinder 24, and the vibration amplitude of the vibration motor 213 is small, so it cannot affect the movement of the insert 34 into the screen hole of the screening cylinder 24.

[0055] When plastic fragments are fed into the screening cylinder 24, the plastic fragments fall from the conveying equipment into the feeding chute 214. The blower 215 is started, and the airflow blown by the blower 215 is positioned and guided from the air guide duct 216 to the feeding chute 214, so that the airflow blows the plastic fragments in the feeding chute 214. The blowing air is relatively small, so as to blow out the smaller and lighter impurities in the plastic fragments.

[0056] When cleaning the screen holes of the screening cylinder 24, the rotation of the screening cylinder 24 drives the pulley 38 on the shaft of the screening cylinder 24 to rotate. The pulley 38 drives the toothed belt 39 to rotate. The toothed belt 39 drives the pulley 38 below to rotate. The pulley 38 below drives the crankshaft 36 to rotate. The crankshaft 36 drives the return frame 37 to rotate. The return frame 37 drives the piston rod 32 to move up and down in the piston cylinder 31. The piston rod 32 drives the second telescopic rod 33 to move. The second telescopic rod 33 drives the insert 34 to move, so that the insert 34 is repeatedly inserted into the screen holes of the screening cylinder 24 for cleaning. When the insert 34 hits the wall of the screening cylinder 24, the insert 34 pushes the second telescopic rod 33 to retract, and the second spring 35 is compressed to protect the insert 34 from damage and ensure the stability of the equipment operation.

[0057] A method for recycling plastic fragments by vibrating screening uses the aforementioned recycling equipment.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A recycling and processing device, comprising a body, a screening mechanism disposed on the body, and an auxiliary mechanism disposed on the body, characterized in that: The screening mechanism includes a screening cylinder, a first discharge chute, and a second discharge chute. The screening cylinder is rotatably mounted on the machine body. The machine body is inclined, and the axis of the screening cylinder is parallel to the bottom surface of the machine body. The first discharge chute and the second discharge chute are fixedly installed at the bottom end of the machine body. The first discharge chute is located above the second discharge chute. The first discharge chute is adjacent to the discharge end of the screening cylinder, and the second discharge chute corresponds to the discharge end of the machine body. The auxiliary mechanism includes inserts and crankshafts. Multiple inserts are arranged on the machine body in a straight line and are evenly distributed. The inserts are located directly below the screening cylinder, and the straight line of the inserts is parallel to the axis of the screening cylinder. Multiple crankshafts are arranged on the machine body, and each crankshaft is located directly below each insert. The crankshafts are powered to drive the inserts to move up and down reciprocally. The movement trajectory of the inserts covers the screen holes of the screening cylinder. The auxiliary mechanism also includes piston cylinders. Multiple piston cylinders are provided on the machine body. The piston cylinders are evenly distributed in a straight line on the bottom surface of the machine body. A piston rod is slidably fitted on each piston cylinder. The piston rod passes through the piston cylinder. A second telescopic rod is provided at the top of each piston rod. The fixed rod of the second telescopic rod is fixedly connected to the piston rod. The insert is fixedly installed on the extension rod of the second telescopic rod. A second spring is sleeved on each second telescopic rod. One end of the second spring is connected to the fixed rod of the second telescopic rod, and the other end of the second spring is connected to the extension rod of the second telescopic rod. The bottom surface of the machine body is rotatably fitted with multiple crankshafts. The crankshafts and piston rods are arranged in a straight line and uniformly in sequence. A return ring is provided between each crankshaft and piston rod. One end of the return ring is rotatably fitted with the bottom end of the piston rod, and the other end of the return ring is rotatably fitted with two adjacent crankshafts, so that the crankshaft as a whole is movably fitted with the other end of each return ring. Both the crankshaft and the screening cylinder are fixedly mounted with pulleys on one end of the crankshaft and on the shaft of the screening cylinder. The two pulleys are opposite each other and a toothed belt is tensioned on the two pulleys.

2. The recycling and processing equipment according to claim 1, characterized in that: The screening mechanism also includes a support frame, which is located below the machine body. The support frame is positioned directly below the machine body and has multiple first telescopic rods. The fixed rods of the first telescopic rods are fixedly connected to the support frame, and the extended rods of the first telescopic rods are fixedly connected to the machine body. Each of the first telescopic rods is fitted with a first spring, one end of which is connected to the fixed rod of the first telescopic rod, and the other end of which is connected to the extended rod of the first telescopic rod.

3. The recycling and processing equipment according to claim 2, characterized in that: The top and bottom of the screening cylinder are both open ends. The top of the screening cylinder is the feeding end, and the bottom of the screening cylinder is the discharging end. The first feeding chute has the same inclination angle as the screening cylinder, so that the plastic fragments screened out inside the screening cylinder fall into the first feeding chute. The feeding plane of the second feeding chute is in the same plane as the bottom surface inside the machine body. The bottom end of the first feeding chute faces one side of the machine body, and the bottom end of the second feeding chute faces the other side of the machine body.

4. The recycling and processing equipment according to claim 3, characterized in that: A servo motor is fixedly mounted on the machine body, a traction wheel is fixedly mounted on the shaft of the servo motor, a driven wheel is fixedly mounted on the shaft of the screening cylinder, the traction wheel is located directly below the driven wheel, and a belt is tensioned between the traction wheel and the driven wheel.

5. The recycling and processing equipment according to claim 4, characterized in that: A bearing is fitted on the screening cylinder, and the inner ring of the bearing is fixedly connected to the screening cylinder. A connecting frame is fixedly installed on the outer ring of the bearing. The connecting frame penetrates the bottom wall of the machine body. The connecting frame and the machine body are movably fitted together, and there is no gap between the connecting frame and the machine body. The bottom end of the connecting frame is located below the machine body, and a vibration motor is fixedly installed on the bottom end of the connecting frame.

6. The recycling and processing equipment according to claim 5, characterized in that: The top of the machine body is provided with a feeding chute, the top of which is connected to the feeder, so that the plastic fragments conveyed by the feeder fall into the feeding chute. The bottom end of the feeding chute faces the feeding end of the screening cylinder and is adjacent to the feeding end of the screening cylinder. A fan is fixedly installed on the machine body, and the air outlet of the fan faces the feeding chute. An air guide tube is fixedly installed on the air outlet of the fan and is connected to the air outlet of the fan, and the air guide tube faces the feeding chute.

7. A method for recycling plastic fragments by vibrating sieve, characterized in that, The recycling and processing equipment according to any one of claims 1-6 was used.

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