Cooling and screening device for plastic particles

Abstract

The utility model discloses a cooling and screening device for plastic particles. The cooling and screening device comprises a supporting seat, a screening mechanism, a vibrating mechanism and a cooling mechanism, the screening mechanism comprises a screening hopper and a screening net; the vibrating mechanism comprises a vibrating seat and a driving device which are connected with each other, and the screening hopper can be driven by the driving device to vibrate relative to the supporting seat; the cooling mechanism comprises an upper cooling assembly and a lower cooling assembly; the output end of the upper cooling assembly is suspended above the screening hopper and is aligned to the top of the screening hopper so as to cool plastic particles on the screening net; the output end of the lower cooling assembly is attached to the bottom of the screening hopper so that plastic particles located at the bottom of the screening hopper can be cooled. The plastic particle screening device is provided with the upper cooling assembly and the lower cooling assembly, so that cooling of plastic particles above and below the screening net can be completed, it is ensured that cooling is completed while the plastic particles are screened, and it is ensured that the plastic particles cannot adhere in the screening process.

Description

Technical Field

[0001] This utility model relates to the field of plastic particle screening devices, specifically to a cooling and screening device for plastic particles. Background Technology

[0002] Plastic particles, also known as plastic granules, are raw materials used to store, transport, and process plastics in a semi-finished form. Plastics are a type of polymer material. They can be made from petroleum, such as ethylene, propylene, vinyl chloride, and styrene. Under certain conditions, the molecules of these substances can react with each other to form compounds with very large molecular weights, i.e., polymers.

[0003] In the production process of relevant enterprises, the manufacturing process of plastic particles generally involves steps such as mixing, melting, extrusion and cutting. During the manufacturing process of plastic particles, some plastic particles that do not meet the requirements in length or thickness will inevitably be present in the final plastic particles. Therefore, after the plastic particles are produced, a screening process is often required to screen out some of the non-compliant particles.

[0004] Chinese patent ZL202322102371.8 discloses: "A screening and conveying mechanism for producing plastic particles, comprising a base and an electric screen, wherein the electric screen is installed above the base; guide frames are symmetrically installed at the top opening of the electric screen, and sleeves are fitted around the guide frames and are slidably configured. A carrier plate is fixedly connected to the outside of the guide frames of the electric screen via the sleeves, and a hopper is fixedly connected above the carrier plate via a bracket. A positioning plate is fixedly connected to the top opening of the hopper. When plastic particles are added into the electric screen, the external feeding pipe is fixed to the surface of the positioning plate. As the material is pumped into the feeding pipe, a reciprocating cylinder is activated. The transmission output end of the reciprocating cylinder drives the carrier plate and the hopper to move back and forth relative to the electric screen via a flexible traction seat, so that the material will not accumulate, improving the screening efficiency and facilitating subsequent conveying operations."

[0005] However, including the solutions described in the aforementioned patents, existing plastic particle screening devices on the market all have a problem: the surface temperature of the plastic particles is still relatively high after they are cut and shaped. During the screening process, the vibration of the screening hopper causes the plastic particles to come into contact with each other, which in turn causes them to stick together. Therefore, if screening is to be carried out smoothly, the plastic particles need to be cooled down at the same time to prevent them from sticking together. However, existing plastic particle screening devices do not have a cooling function. Summary of the Invention

[0006] In order to overcome the shortcomings of existing plastic particle screening devices that lack cooling function, which leads to the easy adhesion of plastic particles during the screening process, this utility model provides a cooling and screening device for plastic particles.

[0007] The technical solution of this utility model to solve its technical problem is: a cooling and screening device for plastic particles, comprising:

[0008] Support base;

[0009] A screening mechanism includes a screening hopper and a screening screen; the screening hopper has an open top and a bottom with a discharge port; the screening screen is connected to the inner wall of the screening hopper and is positioned between the top and bottom of the screening hopper; the screening hopper is inclined above a support base, with the higher end of the screening hopper closed and the lower end having a discharge port;

[0010] A vibration mechanism includes a vibrating seat and a driving device connected to each other. The vibrating seat is connected to a support seat. The driving device can vibrate relative to the support seat through the vibrating seat. The driving device is also connected to the screen hopper so that the screen hopper can also vibrate relative to the support seat under the drive of the driving device.

[0011] The cooling mechanism includes an upper cooling component and a lower cooling component; the output end of the upper cooling component is suspended above the screen hopper and aligned with the top of the screen hopper to cool the plastic particles located on the screen mesh; the output end of the lower cooling component is attached to the bottom of the screen hopper to cool the plastic particles located at the bottom of the screen hopper.

[0012] Furthermore, the upper cooling assembly includes a blower and a duct assembly connected to the blower. The duct assembly includes a main duct connected to the blower and several branch ducts connected to the main duct via multi-port connectors. The branch ducts are suspended above the screen hopper, and several air outlets are arranged and connected to the lower side of each branch duct. The air outlets are positioned to face the top of the screen hopper.

[0013] Furthermore, the lower cooling assembly includes a circulating water pump and a cooling water pipe. The cooling water pipe is coiled and fitted to the bottom of the screen hopper. The bottom of the screen hopper is also connected to several pipe clamps for limiting the cooling water pipe. One end of the cooling water pipe is connected to the inlet end of the circulating water pump, and the other end is connected to the outlet end of the circulating water pump.

[0014] Furthermore, the vibration seat includes a fixed seat and a vibration plate. The fixed seat is connected to a support seat. The first end of the vibration plate is hinged to the fixed seat, and the other end is movably disposed relative to the fixed seat. A return spring and a spring shaft passing through the return spring are disposed between the movably disposed end of the vibration plate and the fixed seat. The return spring is clamped between the fixed seat and the vibration plate. The lower end of the spring shaft is connected to the fixed seat, and the upper end of the spring shaft passes through the vibration plate and extends above the vibration plate. A limiting post that can form an interference fit with the vibration plate is also protruding from the top of the spring shaft.

[0015] Furthermore, a drive wheel is connected to the output shaft of the drive device, a main shaft is rotatably mounted on the screening hopper, both ends of the main shaft extend out from both sides of the screening hopper, and a driven wheel is sleeved on one end of the main shaft. The drive wheel and the driven wheel are connected by a transmission belt, and a flywheel is sleeved on the other end of the main shaft.

[0016] Furthermore, the support base includes several vertically arranged support columns, the top of each support column is connected to a spring base, the outer side of the screening hopper is fixedly connected to a spring top seat, and a buffer spring is sandwiched between the spring top seat and the spring base. The screening hopper is connected to the top of the support columns through the buffer spring.

[0017] Furthermore, the sieve hopper is also provided with several support shafts, and the two ends of the support shafts are connected to the inner walls on both sides of the sieve hopper.

[0018] Furthermore, sliding tracks are connected to the inner walls on both sides of the screening hopper. The sliding tracks are arranged along the length of the screening hopper. A sliding groove is provided on the inner side of the sliding track. The two sides of the screening mesh are inserted into the sliding groove so that the screening mesh can slide along the sliding track. One end of the sliding track is located near the discharge port of the screening hopper. An insertion port is opened on this end of the sliding track. The screening mesh can be connected to the sliding track or detached from the sliding track through the insertion port.

[0019] Furthermore, the screen mesh also includes upwardly bent interference edges on both sides, which are inclined towards the screen hopper. When the screen mesh is inserted into the groove, the interference edges can form an abutment with the inner wall of the sliding track to prevent the screen mesh from sliding relative to the sliding track.

[0020] Furthermore, the bottom inner side of the screening hopper is provided with several material gathering slopes, all of which are inclined downwards, and the discharge port is located at the lowest point of the material gathering slopes.

[0021] The cooling and sieving process of this utility model:

[0022] First, the cut plastic particles enter the hopper from the top and fall onto the screen due to the obstruction of the screen mesh. The hopper continuously vibrates under the drive of the vibration mechanism, causing the plastic particles on the screen to bounce up and down. Plastic particles of the correct length and thickness can fall through the holes in the screen mesh to the area below. During this bouncing motion, the blower of the upper cooling assembly sends airflow through the main and branch pipes to the air outlet, where it is sprayed out to cool the plastic particles above the screen mesh. The plastic particles below the screen fall onto the material-gathering slope inside the screen hopper and slide down the slope, eventually leaving the screen hopper through the discharge port. As the circulating water pump of the lower cooling component drives the cooling water in the cooling water pipe to circulate continuously, and because the cooling water pipe is attached to the lower side of the screen hopper, the heat from the plastic particles can be transferred to the screen hopper, and the heat from the screen hopper can be transferred to the cooling water, thus accelerating the cooling of the plastic particles located on the sawing slope. Finally, some plastic particles that do not meet the length and thickness standards cannot pass through the screen and will slide down the screen, eventually being discharged from the screen hopper through the discharge port.

[0023] The beneficial effects of this utility model are as follows:

[0024] 1. It is equipped with an upper cooling component and a lower cooling component, which can cool the plastic particles above and below the screen, ensuring that the plastic particles are cooled while being screened, and ensuring that the plastic particles do not stick together during the screening process;

[0025] 2. The vibration mechanism consists of a vibration seat and a drive device. During operation, the drive device can vibrate on the moving seat and then transmit the vibration to the screen hopper through the transmission belt, thereby realizing the vibration of the screen hopper. This not only has high transmission efficiency, but also occupies less space.

[0026] 3. The screen mesh is slidably connected to the screen hopper, making it easier to assemble and disassemble the screen mesh relative to the screen hopper. The screen mesh with different hole sizes and shapes can be replaced according to the different lengths and thicknesses of the plastic particles, making the screening device more adjustable and suitable for screening more types of plastic particles.

[0027] 4. A material-gathering ramp is also provided on the inner side of the bottom of the sieve hopper, so that the plastic particles falling into the bottom of the sieve hopper can gather more quickly and leave the sieve hopper through the discharge port. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2This is an exploded schematic diagram of this utility model.

[0030] Figure 3 This is a schematic diagram of the upper cooling component in this utility model.

[0031] Figure 4 This is a schematic diagram showing the combination of the lower cooling component and the screen hopper in this utility model.

[0032] Figure 5 This is a schematic diagram of the vibration mechanism in this utility model.

[0033] Figure 6 This is a schematic diagram showing the disassembled screen hopper and screen mesh in this utility model.

[0034] Figure 7 This is a cross-sectional view of the combination of the screen hopper and the screen mesh in this utility model.

[0035] The diagram labels are as follows: 1. Support base; 2. Screen hopper; 3. Screen mesh; 4. Top; 5. Bottom; 6. Discharge port; 7. Discharge outlet; 8. Vibrating base; 9. Drive unit; 10. Upper cooling assembly; 11. Lower cooling assembly; 12. Blower; 13. Main air duct; 14. Branch air duct; 15. Air outlet; 16. Circulating water pump; 17. Cooling water pipe; 18. Pipe clamp; 19. Fixed base; 20. Vibrating plate; 21. Return spring; 22. Spring shaft; 23. Limiting post; 24. Drive wheel; 25. Main shaft; 26. Driven wheel; 27. Transmission belt; 28. Flywheel; 29. ​​Support column; 30. Spring base; 31. Spring top seat; 32. Buffer spring; 33. Support shaft; 34. Sliding track; 35. Sliding groove; 36. Insertion port; 37. Interference edge; 38. Material gathering slope. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0038] Example

[0039] Combination Figures 1 to 7The diagram illustrates a cooling and screening device for plastic particles, comprising a support base 1, a screening mechanism, a vibration mechanism, and a cooling mechanism. The screening mechanism includes a screening hopper 2 and a screening screen 3. The screening hopper 2 has an open top 4 and a bottom 5 with a discharge port 6. The screening screen 3 is connected to the inner wall of the screening hopper 2 and is positioned between the top 4 and the bottom 5 of the screening hopper 2. The screening hopper 2 is inclined above the support base 1, with the higher end of the screening hopper 2 closed and the lower end having a discharge port 7. The vibration mechanism includes a connected vibrating seat 8 and a driving device 9. The drive device 9 is connected to the support base 1 and can vibrate relative to the support base 1 through the vibrating seat 8. The drive device 9 is also connected to the screen hopper 2 so that the screen hopper 2 can also vibrate relative to the support base 1 under the drive of the drive device 9. The cooling mechanism includes an upper cooling component 10 and a lower cooling component 11. The output end of the upper cooling component 10 is suspended above the screen hopper 2 and aligned with the top 4 of the screen hopper 2 to cool the plastic particles located on the screen mesh 3. The output end of the lower cooling component 11 is attached to the bottom 5 of the screen hopper 2 to cool the plastic particles located on the bottom 5 of the screen hopper 2.

[0040] Combination Figures 1 to 3 As shown, in this embodiment, the upper cooling assembly 10 includes a blower 12 and a duct assembly connected to the blower 12. The duct assembly includes a main duct 13 connected to the blower 12 and several branch ducts 14 connected to the main duct 13 via multi-port connectors. The branch ducts 14 are suspended above the screen hopper 2, and several air outlets 15 are arranged and connected to the lower side of each branch duct 14. The air outlets 15 are positioned to face the top 4 of the screen hopper 2.

[0041] Combination Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the lower cooling assembly 11 includes a circulating water pump 16 and a cooling water pipe 17. The cooling water pipe 17 is coiled and attached to the bottom 5 of the screen hopper 2. The bottom 5 of the screen hopper 2 is also connected to several pipe clamps 18 for limiting the cooling water pipe 17. One end of the cooling water pipe 17 is connected to the inlet end of the circulating water pump 16, and the other end is connected to the outlet end of the circulating water pump 16.

[0042] Combination Figure 1 , Figure 2 and Figure 5As shown, the vibration seat 8 in this embodiment includes a fixed seat 19 and a vibration plate 20. The fixed seat 19 is connected to the support seat 1. The first end of the vibration plate 20 is hinged to the fixed seat 19, and the other end is movably disposed relative to the fixed seat 19. A return spring 21 and a spring shaft 22 passing through the return spring 21 are provided between the movably disposed end of the vibration plate 20 and the fixed seat 19. The return spring 21 is clamped between the fixed seat 19 and the vibration plate 20. The lower end of the spring shaft 22 is connected to the fixed seat 19, and the upper end of the spring shaft 22 passes through the vibration plate 20 and extends above the vibration plate 20. The top 4 of the spring shaft 22 is also provided with a limiting post 23 that can form an interference fit with the vibration plate 20.

[0043] In this embodiment, when the driving device 9 is in the start state, the driving device 9 will vibrate, and the vibrating plate 20 connected to the driving device 9 will be driven. Since one end of the vibrating plate 20 is hinged to the movable seat, the movable end of the vibrating plate 20 will swing relative to the fixed seat 19. Since a return spring 21 is also sandwiched between the vibrating plate 20 and the fixed seat 19, the return spring 21 can act on the vibrating plate 20 to make it always have an upward swinging tendency, thereby suppressing the swing amplitude of the vibrating plate 20 and preventing it from swinging too far and causing damage to the vibrating seat 8.

[0044] Combination Figure 2 and Figure 6 As shown, in this embodiment, a drive wheel 24 is connected to the output shaft of the drive device 9, and a main shaft 25 is rotatably mounted on the screen hopper 2. Both ends of the main shaft 25 extend out from both sides of the screen hopper 2, and a driven wheel 26 is sleeved on one end of the main shaft 25. The drive wheel 24 and the driven wheel 26 are connected by a transmission belt 27, and a flywheel 28 is sleeved on the other end of the main shaft 25.

[0045] Combination Figure 1 and Figure 2 As shown, in this embodiment, the support base 1 includes several vertically arranged support columns 29. The top of the support column 29 is also connected to a spring base 30. The outer side of the screen hopper 2 is also fixedly connected to a spring top seat 31. A buffer spring 32 is also sandwiched between the spring top seat 31 and the spring base 30. The screen hopper 2 is connected to the top of the support column 29 through the buffer spring 32.

[0046] In this embodiment, the screen hopper 2 is movably connected to the upper part of the base by a buffer spring 32. When the screen hopper 2 vibrates under the drive of the vibration mechanism, the buffer spring 32 can act between the base and the screen hopper 2 to prevent the screen hopper 2 from vibrating too much and causing damage between the base and the screen hopper 2.

[0047] Among them, such as Figure 6 As shown in the figure, in this embodiment, the screening hopper 2 is also provided with several support shafts 33, and the two ends of the support shafts 33 are connected to the inner walls on both sides of the screening hopper 2.

[0048] Combination Figure 6 and Figure 7 As shown, in this embodiment, sliding rails 34 are also connected to the inner walls on both sides of the screening hopper 2. The sliding rails 34 are arranged along the length of the screening hopper 2. A sliding groove 35 is provided on the inner side of the sliding rails 34. The two sides of the screening mesh 3 are inserted into the sliding groove 35 so that the screening mesh 3 can slide along the sliding rails 34. One end of the sliding rails 34 is located near the discharge port 7 of the screening hopper 2. An insertion port 36 is provided on this end of the sliding rails 34. The screening mesh 3 can be connected to the sliding rails 34 through the insertion port 36 or detached from the sliding rails 34 through the insertion port 36.

[0049] Combination Figure 6 and Figure 7 As shown, in this embodiment, the screen mesh 3 also includes upwardly bent interference edges 37 on both sides. The interference edges 37 are inclined towards the screen hopper 2. When the screen mesh 3 is inserted into the groove, the interference edges 37 can form an abutment with the inner wall of the sliding track 34 to prevent the screen mesh 3 from sliding relative to the sliding track 34.

[0050] Combination Figure 6 and Figure 7 As shown, in this embodiment, a number of material-gathering slopes 38 are provided on the inner side of the bottom 5 of the screen hopper 2. All material-gathering slopes 38 are inclined downwards, and the discharge port 6 is located at the lowest point of the material-gathering slope 38.

[0051] The cooling and sieving process in this embodiment:

[0052] First, the cut plastic particles enter the hopper 2 from the top 4 and fall onto the screen 3 due to the obstruction of the screen mesh 3. The hopper 2 continuously vibrates under the drive of the vibration mechanism, causing the plastic particles on the screen mesh 3 to bounce up and down. Plastic particles of the correct length and thickness can fall through the holes in the screen mesh 3 to the area below it. While the plastic particles are bouncing on the screen mesh 3, the blower 12 of the upper cooling assembly 10 sends airflow through the main and branch pipes to the air outlet 15, where the airflow is sprayed out to cool the plastic particles above the screen mesh 3. The plastic particles fall onto the material-gathering slope 38 inside the hopper 2 and slide down the slope 38, eventually leaving the hopper 2 through the discharge port 6. As the cooling water in the cooling water pipe 17 is continuously circulated by the circulating water pump 16 of the lower cooling component 11, and because the cooling water pipe 17 is attached to the lower side of the hopper 2, the heat of the plastic particles can be transferred to the hopper 2, and the heat on the hopper 2 can be transferred to the cooling water, thereby accelerating the cooling of the plastic particles located on the sawing slope. Finally, some plastic particles that do not meet the length and thickness standards cannot pass through the screen 3, and will slide down the screen 3 and eventually be discharged from the hopper 2 through the discharge port 7.

[0053] The advantage of this embodiment is that it relies on a cooling mechanism to cool the plastic particles inside the screening device, ensuring that the plastic particles do not stick together during the screening process and ensuring smooth screening.

[0054] The above specific embodiments are merely explanations of the present utility model and are not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to the embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

Claims

1. A cooling and screening device for plastic particles, characterized in that, Including: Support base (1); The screening mechanism includes a screening hopper (2) and a screening screen (3); the screening hopper (2) includes an open top (4) and a bottom (5) with a discharge port (6); the screening screen (3) is connected to the inner wall of the screening hopper (2) and is separated between the top (4) and the bottom (5) of the screening hopper (2); the screening hopper (2) is inclined above the support base (1), the end of the screening hopper (2) at the high position is closed, and the end at the low position has a discharge port (7); The vibration mechanism includes a vibrating seat (8) and a driving device (9) connected to each other. The vibrating seat (8) is connected to the support seat (1). The driving device (9) can vibrate relative to the support seat (1) through the vibrating seat (8). The driving device (9) is also connected to the screen hopper (2) so that the screen hopper (2) can also vibrate relative to the support seat (1) under the drive of the driving device (9). The cooling mechanism includes an upper cooling component (10) and a lower cooling component (11); the output end of the upper cooling component (10) is suspended above the screen hopper (2) and aligned with the top (4) of the screen hopper (2) to cool the plastic particles located on the screen mesh (3); the output end of the lower cooling component (11) is attached to the bottom (5) of the screen hopper (2) to cool the plastic particles located on the bottom (5) of the screen hopper (2).

2. The cooling and screening device for plastic particles according to claim 1, characterized in that: The upper cooling assembly (10) includes a blower (12) and a duct assembly connected to the blower (12). The duct assembly includes a main duct (13) connected to the blower (12) and several branch ducts (14) connected to the main duct (13) via multi-port connectors. The branch ducts (14) are suspended above the screen hopper (2), and several air nozzles (15) are arranged and connected to the lower side of each branch duct (14). The air nozzles (15) are positioned facing the top (4) of the screen hopper (2).

3. The cooling and screening device for plastic particles according to claim 2, characterized in that: The lower cooling assembly (11) includes a circulating water pump (16) and a cooling water pipe (17). The cooling water pipe (17) is coiled and attached to the bottom (5) of the screen hopper (2). The bottom (5) of the screen hopper (2) is also connected to several pipe clamps (18) for limiting the cooling water pipe (17). One end of the cooling water pipe (17) is connected to the inlet end of the circulating water pump (16), and the other end is connected to the outlet end of the circulating water pump (16).

4. The cooling and screening device for plastic particles according to claim 1, characterized in that: The vibration seat (8) includes a fixed seat (19) and a vibration plate (20). The fixed seat (19) is connected to the support seat (1). The first end of the vibration plate (20) is hinged to the fixed seat (19), and the other end is movably disposed relative to the fixed seat (19). A return spring (21) and a spring shaft (22) passing through the return spring (21) are provided between the movably disposed end of the vibration plate (20) and the fixed seat (19). The return spring (21) is clamped between the fixed seat (19) and the vibration plate (20). The lower end of the spring shaft (22) is connected to the fixed seat (19), and the upper end of the spring shaft (22) passes through the vibration plate (20) and extends above the vibration plate (20). The top (4) of the spring shaft (22) is also provided with a limiting post (23) that can form an interference fit with the vibration plate (20).

5. The cooling and screening device for plastic particles according to claim 4, characterized in that: A drive wheel (24) is connected to the output shaft of the drive device (9). A main shaft (25) is rotatably mounted on the sieve hopper (2). Both ends of the main shaft (25) extend out from both sides of the sieve hopper (2). A driven wheel (26) is sleeved on one end of the main shaft (25). The drive wheel (24) and the driven wheel (26) are connected by a transmission belt (27). A flywheel (28) is sleeved on the other end of the main shaft (25).

6. The cooling and screening device for plastic particles according to claim 5, characterized in that: The support base (1) includes several vertically arranged support columns (29). The top of the support column (29) is also connected to a spring base (30). The outer side of the screen hopper (2) is also fixedly connected to a spring top seat (31). A buffer spring (32) is also sandwiched between the spring top seat (31) and the spring base (30). The screen hopper (2) is connected to the top of the support column (29) through the buffer spring (32).

7. The cooling and screening device for plastic particles according to claim 5, characterized in that: The sieve hopper (2) is also provided with several support shafts (33), and the two ends of the support shafts (33) are connected to the inner walls on both sides of the sieve hopper (2).

8. The cooling and screening device for plastic particles according to claim 1, characterized in that: The inner walls on both sides of the sieve hopper (2) are also connected to sliding rails (34). The sliding rails (34) are arranged along the length of the sieve hopper (2). A sliding groove (35) is provided on the inner side of the sliding rails (34). The two sides of the screen mesh (3) are inserted into the sliding groove (35) so that the screen mesh (3) can slide along the sliding rails (34). One end of the sliding rails (34) is located near the discharge port (7) of the sieve hopper (2). An insertion port (36) is provided on this end of the sliding rails (34). The screen mesh (3) can be connected to the sliding rails (34) through the insertion port (36) or detached from the sliding rails (34) through the insertion port (36).

9. A cooling and screening device for plastic particles according to claim 8, characterized in that: The screen mesh (3) also includes upwardly bent interference edges (37) on both sides. The interference edges (37) are inclined towards the screen hopper (2). When the screen mesh (3) is inserted into the groove, the interference edges (37) can form an abutment with the inner wall of the sliding track (34) to prevent the screen mesh (3) from sliding relative to the sliding track (34).

10. A cooling and screening device for plastic particles according to claim 1, characterized in that: The bottom (5) of the screen hopper (2) is provided with several material gathering slopes (38), all of which are inclined downwards, and the discharge port (6) is located at the lowest point of the material gathering slopes (38).

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