Plastic processing device and working method thereof

Abstract

The invention relates to the field of raw material conveying, and discloses a plastic processing device and a working method thereof. The plastic processing device comprises a crushing bin, a screening bin, a crushing mechanism and a screening mechanism; the crushing mechanism is arranged in the crushing bin, a feeding port is formed in the top of the crushing bin, the screening bin is arranged at the bottom of the crushing bin, the screening mechanism is arranged in the screening bin, a plurality of supports are fixedly arranged at the bottom of the screening bin, a driving motor is arranged on the front side wall of the crushing bin, and the screening mechanism is arranged in the screening bin. And a transmission mechanism is connected between the driving motor and the crushing bin. By arranging the sieve plate, the dust raising frame, the air blower and the vibration mechanism, raw materials at the bottom of the dust raising groove can be raised and preliminarily screened, the sieve plate is driven by the vibration mechanism to vibrate, the raw materials at the top of the sieve plate are further screened, meanwhile, the raw materials are in a moving state, and the sieve plate is prevented from being blocked; therefore, multi-stage screening of the raw materials is achieved.

Description

Technical Field

[0001] The invention relates to the field of plastic processing, and in particular to a plastic processing device and a working method thereof. Background Art

[0002] Plastic is a material with high molecular organic matter as the main component. It can change its morphology and structure freely. It can also be polymerized by synthesis or condensation reaction using monomer raw materials. It is widely used. Plastic products are a general term for daily and industrial products made of plastic as the main raw material, including products made of injection molding, blister molding and other processes using plastic as raw materials. In the process of plastic product processing, the raw materials need to be crushed.

[0003] Existing plastic processing crushers all crush plastics by setting crushing rollers or crushing blades. However, during the processing or transportation of plastic raw materials, it is easy for them to be mixed with foreign objects such as metal and gravel that are difficult to crush. Existing crushing devices are difficult to screen them, which affects the quality of plastic finished products. Therefore, a plastic processing device and a working method thereof are proposed, which can effectively solve the above problems. Summary of the invention

[0004] The present invention aims to solve the technical problem that the existing crushing device is difficult to screen foreign matter such as metal and gravel contained in plastic raw materials, and provides a plastic processing device and a working method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problem is: The first aspect of the present invention is to provide a plastic processing device, comprising a crushing bin, a screening bin, a crushing mechanism and a screening mechanism; The crushing mechanism is arranged inside the crushing bin, and a feed port is arranged on the top of the crushing bin, the screening bin is arranged at the bottom of the crushing bin, the screening mechanism is arranged inside the screening bin, and a plurality of brackets are fixedly arranged on the bottom of the screening bin, a driving motor is arranged on the front side wall of the crushing bin, and a transmission mechanism is connected between the driving motor and the crushing bin, the crushing mechanism comprises a pair of symmetrically arranged crushing rollers, the crushing rollers are meshed with each other, the feed port is arranged directly above the crushing rollers, the crushing rollers are rotatably connected to the inner wall of the crushing bin through a rotating shaft, the input end of the rotating shaft is connected to the output end of the transmission mechanism, a driving wheel is arranged between the output end of the driving motor and the outer wall of the transmission mechanism, a driven wheel is rotatably arranged on the front side wall of the screening bin, the diameter of the driving wheel is smaller than that of the driven wheel, the driving wheel and the driven wheel are meshed and connected by a wheel chain, a discharge port is arranged on the side wall of the screening bin, and a vibration mechanism is arranged on the upper part of the discharge port. The plastic raw materials to be processed are added into the crushing bin through the feed port, and the driving motor is started at the same time. When the driving motor rotates, it drives a pair of crushing rollers inside the crushing bin to rotate around the rotating shaft through the driving device, and the raw materials falling from the top feed port are crushed. The crushed raw materials flow into the screening bin. When the driving motor is running, it also drives the driving wheel to rotate, and the driven wheel meshed with it is driven by the wheel chain to rotate, so that the driven wheel rotates in the direction of the discharge port, driving the screening mechanism in the screening bin to screen the raw materials, and the screened raw materials flow out through the discharge port.

[0006] Furthermore, the screening mechanism includes a blower, several groups of dust frames and a screen plate. The blower is fixedly arranged on a side wall of the screening bin away from the discharge port. The output end of the blower extends to the interior of the screening bin. A dust trough is arranged at the inner bottom of the screening bin. The dust trough is arranged in a semi-cylindrical shape. A connecting shaft is rotatably arranged at the center of the dust trough. The outer end of the connecting shaft passes through the screening bin and is fixedly connected to the driven wheel. The dust frame is fixedly arranged on the outer wall of the connecting shaft. A dust rod is fixedly arranged at the outer end of the dust frame. Reinforcing ribs are fixedly arranged between adjacent dust frames. When the driven wheel rotates, it drives the connecting shaft to rotate accordingly. When the connecting shaft rotates, it drives the dust frame connected to its outer wall to start rotating, and the raw materials at the bottom of the dust trough are lifted up. During screening, the blower is started to blow air into the screening bin, so that the lifted raw materials are subjected to horizontal wind force. The metal gravel and other debris with larger mass and difficult to break in the raw materials move a shorter distance in the horizontal direction, and most of them fall into the dust trough again. The plastic powder with smaller mass and easy to break moves a longer distance in the horizontal direction, and most of them fall on the surface of the sieve plate at the top of the discharge port.

[0007] Furthermore, the screen plate is movably arranged at the inner top of the discharge port, a top platform is arranged between the dust trough and the discharge port, a sliding sleeve is slidably arranged on the top of the top platform, the edge of the screen plate close to the dust trough is rotatably connected to the top of the outer wall of the sliding sleeve, and the edge of the other side of the screen plate is movably connected to the inner wall of the screening bin. The dust frame rotates, driving the lower side of the top platform of the sliding sleeve to slide, so that the edge of the screen plate rotatably connected to the sliding sleeve moves downward, and at this time the screen plate forms an inclined surface facing the dust trough, and under the action of the vibration mechanism, the larger impurities such as metal and gravel left on its surface flow into the dust trough again for re-screening, thereby improving the screening accuracy.

[0008] Furthermore, the vibration mechanism includes a vibration motor, an eccentric wheel and a vertical rod, the vibration motor is fixedly arranged on the outer wall of the screening bin, the output end of the vibration motor is connected to an output shaft, the other end of the output shaft extends to the inside of the screening bin and is fixedly connected to the center of the eccentric wheel, the end of the eccentric wheel away from the output shaft is horizontally rotatably connected to a connecting rod, the other end of the connecting rod is rotatably connected to the top of the vertical rod, and the bottom end of the vertical rod is rotatably connected to the top surface of the screen plate through a universal seat. When the raw material falls on the surface of the screen plate, the vibration motor is started, and the eccentric wheel is driven to rotate through the output shaft, so that the vertical rod connected to it through the connecting rod starts to move up and down, driving the screen plate rotatably connected to the bottom of the vertical rod to start vibrating up and down around the sliding sleeve, further screening the raw materials on the top of the screen plate, and at the same time making the raw materials in motion to prevent the screen plate from being blocked, the smaller plastics in the raw materials pass through the screen plate and flow out through the discharge port, and the remaining larger impurities such as metal and gravel are left on the surface of the screen plate.

[0009] Furthermore, a sliding mechanism is provided at the top of the top platform, and the sliding mechanism includes a slide, a sleeve is movably mounted on the outside of the slide, a telescopic guide rod is connected between the top of the slide and the inner top of the sleeve, a spring is provided on the outside of the telescopic guide rod, a side wall of the slide facing the dust collecting groove is evenly provided with a plurality of latch teeth, a gear is meshedly provided on the outside of the latch teeth, the center of the gear is fixedly connected to the inner wall of the slide through a gear shaft, and the end of the gear shaft is rotatably connected to the inner wall of the slide. The slide slides downward along the slide, the telescopic guide rod is shortened, the spring is compressed, and an elastic force in the opposite direction is generated, and the gear is driven to move downward, and the gear is driven to rotate around the gear shaft in the opposite direction to the dust collecting frame through the latch teeth meshing therewith.

[0010] Furthermore, a rack is meshed at the bottom of the gear, a groove is provided on the outer wall of the sleeve facing the dust collecting groove, the rack penetrates the sleeve and extends to the inside of the groove, a top block is slidably connected to the inside of the groove, and the inner wall of the top block is fixedly connected to the rack. When the gear rotates, the rack meshed with the gear at its bottom moves toward the inside of the sleeve, so that the top block moves toward the groove during the descent of the sleeve until it is separated from the dust collecting rod.

[0011] Furthermore, the rack is vertically arranged on the slide, and the side wall of the top block facing the dust collecting groove is arranged in an arc-shaped concave surface, and the size of the top block matches the depth of the groove.

[0012] Furthermore, a waste opening is provided at the center of the bottom of the dust collecting trough, and a valve is provided at the bottom of the waste opening. After the screening is completed, the valve is opened, and the impurities screened in the dust collecting trough are discharged along the waste opening.

[0013] A second aspect of the present invention is to provide a working method of a plastic processing device, the steps comprising: S1. First, close the valve, add the plastic raw materials to be processed into the crushing bin through the feed inlet, and start the drive motor at the same time; S2. When the driving motor rotates, the driving device drives a pair of crushing rollers inside the crushing bin to rotate around the rotating shaft in opposite directions, crushing the raw materials falling from the top feed port, and the crushed raw materials flow into the semi-cylindrical dust trough at the bottom of the screening bin; S3, when the driving motor is running, it drives the driving wheel to rotate, and the driven wheel meshed with it is driven by the wheel chain to rotate, so that the driven wheel rotates in the direction toward the discharge port, driving the connecting shaft to rotate, and when the connecting shaft rotates, it drives the dust frame connected to its outer wall to start rotating, and the raw materials at the bottom of the dust trough are lifted; S4. At this time, the blower is started to blow air into the screening bin, so that the lifted raw materials are subjected to horizontal wind force. The metal gravel and other debris with large mass and difficult to break in the raw materials move a short distance in the horizontal direction, and most of them fall into the dust trough again. The plastic powder with small mass and easy to break moves a long distance in the horizontal direction, and most of them fall on the surface of the sieve plate at the top of the discharge port; S5. When the raw material falls on the surface of the screen plate, the vibration motor is started, and the eccentric wheel is driven to rotate through the output shaft, so that the vertical rod connected to it through the connecting rod starts to move up and down, driving the screen plate connected to the bottom of the vertical rod to rotate and start to vibrate up and down around the sliding sleeve, so as to further screen the raw material on the top of the screen plate. At the same time, the raw material is kept in a moving state to prevent the screen plate from being blocked. The smaller plastic in the raw material passes through the screen plate and flows out through the discharge port, and the remaining larger impurities such as metal and gravel are left on the surface of the screen plate; S6. As the dust raising frame continues to rotate, the dust raising rod on its edge moves to interfere with the top block on the side wall of the sliding sleeve, generating a thrust in the opposite direction on the top block, causing the sliding sleeve to slide downward along the sliding table, shortening the telescopic guide rod, compressing the spring, and generating an elastic force in the opposite direction; S7, when the sliding sleeve moves downward, it drives the gear to move downward with it, and the gear driven by the meshing teeth rotates around the gear shaft in the opposite direction of the dust raising frame, driving the rack meshing with the gear at its bottom to move toward the inside of the sliding sleeve, so that the top block is separated from the dust raising rod during the sliding sleeve descending process; S8. When the sliding sleeve moves downward, it drives the edge of the sieve plate connected to it to move downward. At this time, the sieve plate forms an inclined surface facing the dust trough. Under the action of the vibration mechanism, the large impurities such as metal and gravel left on its surface flow into the dust trough again for re-screening, thereby improving the screening accuracy. S9. When the top block is separated from the dust raising rod, the sliding sleeve is reset under the elastic force of the spring. Repeating the above steps can realize multiple precise screening of the raw materials. After the screening is completed, open the valve and the impurities screened in the dust raising trough are discharged along the waste outlet.

[0014] Furthermore, the initial position of the screen plate forms an angle of 10°-30° with the horizontal plane.

[0015] Beneficial effects of the present invention: 1. The plastic processing device of the present invention is provided with a dust raising frame, a blower and a vibration mechanism, which can raise the raw materials at the bottom of the dust raising trough, and blow air to the inside of the screening bin through the blower, so that the raised raw materials are subjected to horizontal wind force, and the metal gravel and other debris with large mass and difficult to crush in the raw materials move a short distance in the horizontal direction, and most of them fall into the inside of the dust raising trough again, and the plastic powder with small mass and easy to crush moves a long distance in the horizontal direction, and most of them fall on the surface of the sieve plate at the top of the discharge port. When the raw materials fall on the surface of the sieve plate, the vibration motor is started, and the eccentric wheel is driven to rotate through the output shaft, so that the vertical rod connected to it through the connecting rod starts to move up and down, driving the sieve plate connected to the bottom of the vertical rod to start vibrating up and down around the sliding sleeve, and the raw materials on the top of the sieve plate are further screened, and at the same time, the raw materials are kept in a moving state to prevent the sieve plate from being blocked, and the plastic with smaller volume in the raw materials passes through the sieve plate and flows out through the discharge port, and the remaining impurities with larger volume such as metal and gravel are left on the surface of the sieve plate, thereby realizing multi-stage screening of the raw materials.

[0016] 2. By providing a sliding sleeve and a top block, the sliding sleeve can be driven by the dust-raising rod to slide downward along the slide table. When the sliding sleeve moves downward, it drives the edge of the sieve plate rotatably connected thereto to move downward. At this time, the sieve plate forms an inclined surface facing the dust trough. Under the action of the vibration mechanism, the larger impurities such as metal and gravel left on its surface flow into the dust trough again for re-screening, thereby effectively improving the screening accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the plastic processing device; Figure 2 It is a schematic diagram of the internal structure of the plastic processing device; Figure 3 It is an enlarged schematic diagram of the structure at position A of the plastic processing device; Figure 4It is a schematic side view of the vibration mechanism of the plastic processing device; Figure 5 The utility model is a schematic diagram of the connection structure of the sliding sleeve and the sliding table of the plastic processing device.

[0018] Explanation of the reference numerals: 1. Crushing bin; 2. Screening bin; 3. Bracket; 4. Feed inlet; 5. Discharge outlet; 6. Blower; 7. Transmission mechanism; 8. Driven wheel; 9. Wheel chain; 10. Driving motor; 11. Driving wheel; 12. Connecting shaft; 13. Crushing roller; 14. Rotating shaft; 15. Dust trough; 16. Vibrating mechanism; 17. Dust rack; 18. Dust rod; 19. Reinforcing rib; 20. Vibrating motor; 21. Sliding mechanism; 22. Screen plate; 23. Waste outlet; 24. Valve; 25. Output shaft; 26. Eccentric wheel; 27. Connecting rod; 28. Vertical rod; 29. ​​Sliding sleeve; 30. Sliding table; 31. Top table; 32. Gear; 33. Gear; 34. Groove; 35. Top block; 36. Rack; 37. Telescopic guide rod; 38. Spring; 39. Gear shaft. DETAILED DESCRIPTION

[0019] The concept and technical effects of the present invention will be clearly and completely described below in conjunction with embodiments to fully understand the purpose, features and effects of the present invention.

[0020] like Figure 1-5 As shown, a plastic processing device comprises a crushing chamber 1, a screening chamber 2, a crushing mechanism and a screening mechanism; The crushing mechanism is arranged inside the crushing bin 1, and a feed port 4 is arranged on the top of the crushing bin 1. The screening bin 2 is arranged at the bottom of the crushing bin 1. The screening mechanism is arranged inside the screening bin 2, and a plurality of brackets 3 are fixedly arranged at the bottom of the screening bin 2. A driving motor 10 is arranged on the front side wall of the crushing bin 1, and a transmission mechanism 7 is connected between the driving motor 10 and the crushing bin 1. The crushing mechanism includes a pair of symmetrically arranged crushing rollers 13, and the crushing rollers 13 are meshed with each other. The feed port 4 is arranged just above the crushing rollers 13. The crushing roller 13 is rotatably connected to the inner wall of the crushing bin 1 through the rotating shaft 14, the input end of the rotating shaft 14 is connected to the output end of the transmission mechanism 7, a driving wheel 11 is arranged between the output end of the driving motor 10 and the outer wall of the transmission mechanism 7, a driven wheel 8 is rotatably arranged on the front side wall of the screening bin 2, the diameter of the driving wheel 11 is smaller than that of the driven wheel 8, the driving wheel 11 and the driven wheel 8 are meshed and connected by a wheel chain 9, a discharge port 5 is arranged on the side wall of the screening bin 2, and a vibration mechanism 16 is arranged on the upper part of the discharge port 5. The plastic raw material to be processed is added into the crushing bin 1 along the feed port 4, and the drive motor 10 is started at the same time. When the drive motor 10 rotates, it drives a pair of crushing rollers 13 inside the crushing bin 1 to rotate around the rotating shaft 14 through the drive device, and the raw materials falling from the top feed port 4 are crushed. The crushed raw materials flow into the screening bin 2. When the drive motor 10 is running, it drives the drive wheel 11 to rotate accordingly, and drives the driven wheel 8 meshing with it to rotate accordingly through the wheel chain 9, so that the driven wheel 8 rotates in the direction toward the discharge port 5, driving the screening mechanism in the screening bin 2 to screen the raw materials, and the screened raw materials flow out along the discharge port 5.

[0021] The screening mechanism includes a blower 6, several groups of dust frames 17 and a screen plate 22. The blower 6 is fixedly arranged on the side wall of the screening bin 2 away from the discharge port 5. The output end of the blower 6 extends to the interior of the screening bin 2. A dust groove 15 is arranged at the inner bottom of the screening bin 2. The dust groove 15 is arranged in a semi-cylindrical shape. A connecting shaft 12 is rotatably arranged at the center of the dust groove 15. The outer end of the connecting shaft 12 passes through the screening bin 2 and is fixedly connected to the driven wheel 8. The dust frame 17 is fixedly arranged on the outer wall of the connecting shaft 12. A dust rod 18 is fixedly arranged at the outer end of the dust frame 17. Reinforcing ribs 19 are fixedly arranged between adjacent dust frames 17. When the driven wheel 8 rotates, the connecting shaft 12 is driven to rotate accordingly. When the connecting shaft 12 rotates, the dust frame 17 connected to its outer wall starts to rotate, and the raw materials at the bottom of the dust trough 15 are lifted up. During screening, the blower 6 is started to blow air into the screening bin 2, so that the lifted raw materials are subjected to horizontal wind force. The metal gravel and other debris with large mass and difficult to break in the raw materials move a short distance in the horizontal direction, and most of them fall into the dust trough 15 again. The plastic powder with small mass and easy to break moves a long distance in the horizontal direction, and most of them fall on the surface of the sieve plate 22 at the top of the discharge port 5.

[0022] The sieve plate 22 is movably arranged at the inner top of the discharge port 5, a top platform 31 is arranged between the dust trough 15 and the discharge port 5, a sliding sleeve 29 is slidably arranged at the top of the top platform 31, and the edge of the sieve plate 22 close to the dust trough 15 is rotatably connected to the top of the outer wall of the sliding sleeve 29, and the edge of the other side of the sieve plate 22 is movably connected to the inner wall of the screening bin 2. The dust frame 17 rotates, driving the lower side of the top platform 31 of the sliding sleeve 29 to slide, so that the edge of the sieve plate 22 rotatably connected to the sliding sleeve 29 moves downward accordingly, and at this time the sieve plate 22 forms an inclined surface facing the dust trough 15, and under the action of the vibration mechanism 16, the larger impurities such as metal and gravel left on its surface flow into the dust trough 15 again, and are screened again, thereby improving the screening accuracy.

[0023] The vibration mechanism 16 includes a vibration motor 20, an eccentric wheel 26 and a vertical rod 28. The vibration motor 20 is fixedly arranged on the outer wall of the screening bin 2. The output end of the vibration motor 20 is connected to the output shaft 25. The other end of the output shaft 25 extends to the interior of the screening bin 2 and is fixedly connected to the center of the eccentric wheel 26. The end of the eccentric wheel 26 away from the output shaft 25 is horizontally rotatably connected to a connecting rod 27. The other end of the connecting rod 27 is rotatably connected to the top end of the vertical rod 28. The bottom end of the vertical rod 28 is rotatably connected to the top surface of the screen plate 22 through a universal seat. When the raw material falls on the surface of the sieve plate 22, the vibration motor 20 is started, and the eccentric wheel 26 is driven to rotate through the output shaft 25, so that the vertical rod 28 connected to it through the connecting rod 27 starts to move up and down, driving the sieve plate 22 connected to the bottom of the vertical rod 28 to start vibrating up and down around the sliding sleeve 29, so as to further screen the raw material on the top of the sieve plate 22, and at the same time, the raw material is in a moving state to prevent the sieve plate 22 from being blocked. The smaller plastic in the raw material passes through the sieve plate 22 and flows out through the discharge port 5, and the remaining larger impurities such as metal and gravel are left on the surface of the sieve plate 22.

[0024] The top of the top platform 31 is provided with a sliding mechanism 21, which includes a slide 30, a sleeve 29 movably sleeved on the outside of the slide 30, a telescopic guide rod 37 connected between the top of the slide 30 and the inner top of the sleeve 29, a spring 38 is provided on the outside of the telescopic guide rod 37, a side wall of the slide 30 facing the dust trough 15 is evenly provided with a plurality of latch teeth 32, a gear 33 is meshedly provided on the outside of the latch teeth 32, the center of the gear 33 is fixedly connected to the inner wall of the sleeve 29 through the gear 33 shaft, and the end of the gear 33 shaft is rotatably connected to the inner wall of the sleeve 29. When the sleeve 29 slides downward along the slide 30, the telescopic guide rod 37 is shortened, the spring 38 is compressed, and an elastic force in the opposite direction is generated, and the gear 33 is driven to move downward, and the gear 33 is driven to rotate around the gear 33 shaft along the dust frame 17 in the opposite direction through the latch teeth 32 meshed therewith.

[0025] A rack 36 is meshedly provided at the bottom of the gear 33, a groove 34 is provided on the outer wall of the sliding sleeve 29 facing the dust collecting groove 15, the rack 36 penetrates the sliding sleeve 29 and extends to the inside of the groove 34, a top block 35 is slidably connected to the inside of the groove 34, and the inner side wall of the top block 35 is fixedly connected to the rack 36. When the gear 33 rotates, the rack 36 meshed with the gear 33 at its bottom moves toward the inside of the sliding sleeve 29, so that the top block 35 moves toward the groove 34 in the process of the sliding sleeve 29 descending until it is separated from the dust collecting rod 18.

[0026] The rack 36 is vertically arranged with respect to the slide 30 , and the top block 35 is arranged with an arc-shaped concave surface on one side wall facing the dust-generating trough 15 , and the size of the top block 35 matches the depth of the groove 34 .

[0027] A waste material port 23 is provided at the bottom center of the dust trough 15, and a valve 24 is provided at the bottom of the waste material port 23. After the screening is completed, the valve 24 is opened, and the impurities screened out in the dust trough 15 are discharged along the waste material port 23.

[0028] Working principle: First, close the valve 24, add the plastic raw materials to be processed into the crushing bin 1 along the feed port 4, and start the drive motor 10 at the same time; when the drive motor 10 rotates, the pair of crushing rollers 13 in the crushing bin 1 are driven by the drive device to rotate around the rotating shaft 14 in opposite directions, and the raw materials falling from the top feed port 4 are crushed, and the crushed raw materials flow into the semi-cylindrical dust trough 15 at the bottom of the screening bin 2; when the drive motor 10 is running, it also drives the drive wheel 11 to rotate, and drives the driven wheel 8 meshing with it to rotate through the wheel chain 9, so that the driven wheel 8 rotates in the direction toward the discharge port 5, driving the connecting shaft 12 to rotate, and when the connecting shaft 12 rotates, it drives the dust frame 17 connected to its outer wall to start rotating, and the dust trough 1 5, the raw materials at the bottom are lifted up; at this time, the blower 6 is started to blow air into the screening bin 2, so that the lifted raw materials are subjected to the horizontal wind force, and the metal gravel and other debris with large mass and difficult to break in the raw materials move a short distance in the horizontal direction, and most of them fall into the dust trough 15 again, and the plastic powder with small mass and easy to break moves a long distance in the horizontal direction, and most of them fall on the surface of the sieve plate 22 at the top of the discharge port 5; when the raw materials fall on the surface of the sieve plate 22, the vibration motor 20 is started, and the eccentric wheel 26 is driven to rotate through the output shaft 25, so that the vertical rod 28 connected to it through the connecting rod 27 starts to move up and down, driving the sieve plate 22 connected to the bottom of the vertical rod 28 to rotate around the sliding sleeve 29 to start up and down vibration, which affects the raw materials on the top of the sieve plate 22. Further screening is carried out, and at the same time, the raw materials are kept in a moving state to prevent clogging of the screen plate 22. The smaller plastics in the raw materials pass through the screen plate 22 and flow out through the discharge port 5, and the remaining larger impurities such as metal and gravel are left on the surface of the screen plate 22; as the dust frame 17 continues to rotate, the dust rod 18 on its edge is driven to move until it interferes with the top block 35 on the side wall of the sliding sleeve 29, and a thrust is generated in the opposite direction on the top block 35, so that the sliding sleeve 29 slides downward along the slide table 30, the telescopic guide rod 37 is shortened, and the spring 38 is compressed to generate an elastic force in the opposite direction; when the sliding sleeve 29 moves downward, it drives the gear 33 to move downward accordingly, and drives the gear 33 around the gear 33 axis through the engaged latch 32 to rotate in the opposite direction of the dust frame 17, driving its bottom The rack 36 meshing with the gear 33 moves toward the inside of the sliding sleeve 29, so that the top block 35 is separated from the dust rod 18 during the descent of the sliding sleeve 29; when the sliding sleeve 29 moves downward, the edge of the sieve plate 22 connected to it is driven to move downward, and at this time, the sieve plate 22 forms an inclined surface facing the dust trough 15, and under the action of the vibration mechanism 16, the impurities such as metal and gravel with a large volume left on its surface flow into the dust trough 15 again for re-screening, thereby improving the screening accuracy; when the top block 35 is separated from the dust rod 18, the sliding sleeve 29 is reset under the elastic force of the spring 38, and the above steps are repeated to realize multiple accurate screening of the raw materials. After the screening is completed, the valve 24 is opened, and the impurities screened in the dust trough 15 are discharged along the waste port 23. .

[0029] The above embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work shall all fall within the scope of protection of the present invention.

Claims

1. A plastic processing device, characterized in that: It comprises a crushing chamber (1), a screening chamber (2), a crushing mechanism and a screening mechanism; The crushing mechanism is arranged inside the crushing bin (1), and a feed port (4) is arranged on the top of the crushing bin (1). The screening bin (2) is arranged at the bottom of the crushing bin (1). The screening mechanism is arranged inside the screening bin (2), and a plurality of brackets (3) are fixedly arranged on the bottom of the screening bin (2). A drive motor (10) is arranged on the front side wall of the crushing bin (1), and a transmission mechanism (7) is connected between the drive motor (10) and the crushing bin (1). The crushing mechanism comprises a pair of symmetrically arranged crushing rollers (13), the crushing rollers (13) meshing with each other, and the feed port (4) is arranged just above the crushing rollers (13). The crushing roller (13) is rotatably connected to the inner wall of the crushing bin (1) via a rotating shaft (14); the input end of the rotating shaft (14) is connected to the output end of the transmission mechanism (7); a driving wheel (11) is provided between the output end of the driving motor (10) and the outer wall of the transmission mechanism (7); a driven wheel (8) is rotatably provided on the front side wall of the screening bin (2); the diameter of the driving wheel (11) is smaller than that of the driven wheel (8); the driving wheel (11) and the driven wheel (8) are meshedly connected via a wheel chain (9); a discharge port (5) is provided on the side wall of the screening bin (2); and a vibration mechanism (16) is provided on the upper part of the discharge port (5).

2. A plastic processing device according to claim 1, characterized in that: The screening mechanism comprises a blower (6), a plurality of groups of dust raising frames (17) and a screen plate (22); the blower (6) is fixedly arranged on a side wall of the screening bin (2) away from the discharge port (5); the output end of the blower (6) extends into the interior of the screening bin (2); a dust raising groove (15) is arranged at the inner bottom of the screening bin (2); the dust raising groove (15) is arranged in a semi-cylindrical shape; a connecting shaft (12) is rotatably arranged at the center of the dust raising groove (15); the outer end of the connecting shaft (12) passes through the screening bin (2) and is fixedly connected to the driven wheel (8); the dust raising frame (17) is fixedly arranged on the outer wall of the connecting shaft (12); a dust raising rod (18) is fixedly arranged at the outer end of the dust raising frame (17); and reinforcing ribs (19) are fixedly arranged between adjacent dust raising frames (17).

3. A plastic processing device according to claim 2, characterized in that: The sieve plate (22) is movably arranged at the inner top of the discharge port (5); a top platform (31) is arranged between the dust trough (15) and the discharge port (5); a sliding sleeve (29) is slidably arranged on the top of the top platform (31); an edge of one side of the sieve plate (22) close to the dust trough (15) is rotatably connected to the top of the outer wall of the sliding sleeve (29); and an edge of the other side of the sieve plate (22) is movably connected to the inner wall of the screening bin (2).

4. A plastic processing device according to claim 3, characterized in that: The vibration mechanism (16) comprises a vibration motor (20), an eccentric wheel (26) and a vertical rod (28); the vibration motor (20) is fixedly arranged on the outer wall of the screening bin (2); the output end of the vibration motor (20) is connected to an output shaft (25); the other end of the output shaft (25) extends to the inside of the screening bin (2) and is fixedly connected to the center of the eccentric wheel (26); one end of the eccentric wheel (26) away from the output shaft (25) is horizontally rotatably connected to a connecting rod (27); the other end of the connecting rod (27) is rotatably connected to the top end of the vertical rod (28); and the bottom end of the vertical rod (28) is rotatably connected to the top surface of the sieve plate (22) via a universal seat.

5. A plastic processing device according to claim 3, characterized in that: A sliding mechanism (21) is arranged on the top of the top platform (31), and the sliding mechanism (21) includes a sliding platform (30). The sliding sleeve (29) is movably sleeved on the outside of the sliding platform (30). A telescopic guide rod (37) is connected between the top of the sliding platform (30) and the inner top of the sliding sleeve (29). A spring (38) is arranged on the outside of the telescopic guide rod (37). A side wall of the sliding platform (30) facing the dust collecting trough (15) is evenly provided with a plurality of latch teeth (32). A gear (33) is meshingly arranged on the outside of the latch teeth (32). The center of the gear (33) is fixedly connected to the inner wall of the sliding sleeve (29) via a gear shaft (39), and the end of the gear shaft (39) is rotatably connected to the inner wall of the sliding sleeve (29).

6. A plastic processing device according to claim 5, characterized in that: A rack (36) is meshingly provided at the bottom of the gear (33); a groove (34) is provided on an outer wall of the sliding sleeve (29) facing the dust collecting groove (15); the rack (36) penetrates the sliding sleeve (29) and extends to the inside of the groove (34); a top block (35) is slidably connected to the inside of the groove (34); and an inner side wall of the top block (35) is fixedly connected to the rack (36).

7. A plastic processing device according to claim 6, characterized in that: The rack (36) is arranged perpendicularly to the slide table (30), and the top block (35) is arranged in an arc-shaped concave surface on a side wall facing the dust-generating groove (15), and the size of the top block (35) matches the depth of the groove (34).

8. A plastic processing device according to claim 2, characterized in that: A waste material opening (23) is provided at the center of the bottom of the dust generating trough (15), and a valve (24) is provided at the bottom of the waste material opening (23).

9. A method for operating a plastic processing device according to any one of claims 1 to 8, characterized in that the steps include: S1, first close the valve (24), add the plastic raw material to be processed into the crushing bin (1) through the feed inlet (4), and start the drive motor (10); S2, when the driving motor (10) rotates, the driving device (7) drives a pair of crushing rollers (13) inside the crushing bin (1) to rotate around the rotating shaft (14) in opposite directions, thereby crushing the raw materials falling from the top feed port (4), and the crushed raw materials flow into the semi-cylindrical dust trough (15) at the bottom of the screening bin (2); S3, when the driving motor (10) is running, it drives the driving wheel (11) to rotate, and drives the driven wheel (8) meshing with it to rotate through the wheel chain (9), so that the driven wheel (8) rotates in the direction toward the discharge port (5), driving the connecting shaft (12) to rotate, and when the connecting shaft (12) rotates, the dust frame (17) connected to its outer wall starts to rotate, so that the raw materials at the bottom of the dust trough (15) are lifted; S4, at this time, the blower (6) is started to blow air into the screening bin (2), so that the raised raw materials are subjected to the horizontal wind force, and the debris such as metal gravel which is heavy and difficult to crush in the raw materials moves a short distance in the horizontal direction, and most of them fall into the dust trough (15) again, while the plastic powder which is light and easy to crush moves a long distance in the horizontal direction, and most of them fall on the surface of the sieve plate (22) at the top of the discharge port (5); S5, when the raw material falls on the surface of the sieve plate (22), the vibration motor (20) is started, and the eccentric wheel (26) is driven to rotate through the output shaft (25), so that the vertical rod (28) connected thereto through the connecting rod (27) starts to move up and down, driving the sieve plate (22) connected to the bottom of the vertical rod (28) to start vibrating up and down around the sliding sleeve (29), so as to further screen the raw material on the top of the sieve plate (22), and at the same time, the raw material is kept in a moving state to prevent the sieve plate (22) from being blocked. The plastic with a smaller volume in the raw material passes through the sieve plate (22) and flows out through the discharge port (5), and the remaining impurities with a larger volume such as metal and gravel are left on the surface of the sieve plate (22); S6. As the dust raising frame (17) continues to rotate, the dust raising rod (18) on its edge moves until it interferes with the top block (35) on the side wall of the sliding sleeve (29), generating a thrust in the opposite direction on the top block (35), causing the sliding sleeve (29) to slide downward along the sliding table (30), shortening the telescopic guide rod (37), compressing the spring (38), and generating an elastic force in the opposite direction; S7, when the sliding sleeve (29) moves downward, the gear (33) is driven to move downward accordingly, and the gear (33) is driven to rotate around the gear shaft (39) in the opposite direction to the dust raising frame (17) through the engaging teeth (32) therewith, and the rack (36) at the bottom thereof engaged with the gear (33) is driven to move toward the inner side of the sliding sleeve, so that the top block (35) is separated from the dust raising rod (18) during the process of the sliding sleeve (29) descending; S8, when the sliding sleeve (29) moves downward, the edge of the sieve plate (22) connected thereto is driven to move downward, and at this time, the sieve plate (22) forms an inclined surface facing the dust trough (15), and under the action of the vibration mechanism (16), the impurities such as metal and gravel with a large volume left on the surface of the sieve plate flow into the interior of the dust trough (15) again for re-screening, thereby improving the screening accuracy; S9. When the top block (35) is separated from the dust raising rod (18), the sliding sleeve (29) is reset under the elastic force of the spring (38). The above steps are repeated to achieve multiple accurate screening of the raw materials. After the screening is completed, the valve (24) is opened, and the impurities screened out in the dust raising trough (15) are discharged along the waste material outlet (23).

10. The working method of a plastic processing device according to claim 9, characterized in that: The initial position of the sieve plate (22) forms an angle of 10°-30° with the horizontal plane.

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