A device for recycling plastic pellets

Abstract

This utility model relates to the field of plastic granule recycling, specifically a device for recycling plastic granules, including a cooling and forming device, a granulation device, and a vibrating screening device. The cooling and forming device includes a cooling circulation system and a forming channel. The cooling circulation system is connected by pipelines to form a closed-loop water circuit, and the forming channel is located in the inner cavity of the cooling chamber. The granulation device includes a power mechanism, a transmission assembly, and a crushing roller assembly. The crushing roller assembly is installed inside a protective cover and is located directly below the cooling and forming device. The power mechanism drives the crushing roller assembly to operate through the transmission assembly. The vibrating screening device includes a vibration drive mechanism, a grading screen assembly, and a feeding guide structure. The grading screen assembly is installed on a base through an elastic support and is located directly below the granulation device. The vibration drive mechanism is connected to the screen assembly and drives its vibration. This equipment shortens the cooling path of molten plastic, saves space, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic pellet recycling, and in particular to a device for recycling plastic pellets. Background Technology

[0002] Plastic granules, also known as plastic pellets, are raw materials for storing, transporting, and processing plastics in a semi-finished form. With environmental protection now a global priority, recycling waste plastics has become an effective method of disposal. Waste plastic granulation is a recycling method that transforms waste plastics into granules through a granulation process. Recycled granules can be used for molding and processing, producing products with performance nearly identical to the original products, resulting in high economic benefits. Compared to landfilling and incineration of waste plastics, recycling granulation represents true resource recycling.

[0003] In most existing melt granulation technologies, molten plastic needs to be cooled in a water tank. The long cooling tank increases the footprint of the equipment and reduces production efficiency. Utility Model Content

[0004] To address the problems of excessively long cooling cycles and large footprints in existing equipment, this invention provides a device for recycling plastic granules. The technical solution adopted by this invention is as follows: A device for recycling plastic granules includes a cooling and forming device, a granulation device, and a vibrating screening device. The cooling and forming device comprises a cooling circulation system and a forming channel. The cooling circulation system consists of circulation pipes, a circulation pump, a water storage component, and inlet / outlet water structures, forming a closed-loop water circulation circuit through pipe connections. The forming channel is located within the inner cavity of the cooling chamber. The granulation device includes a power mechanism, a transmission assembly, and a crushing roller assembly. The power mechanism includes a spur gear and a motor. The crushing roller assembly is installed inside a protective cover and located directly below the cooling and forming device. The power mechanism drives the crushing roller assembly through the transmission assembly, and a support base is provided at its bottom. The vibrating screening device includes a vibration drive mechanism, a grading screen assembly, and a feeding guide structure. The grading screen assembly is installed on the base through elastic supports and is located directly below the granulation device. The vibration drive mechanism is connected to the screen assembly and drives its vibration.

[0005] The aforementioned device for recycling plastic granules includes a water storage component comprising a cooling tank and a water storage tank, and an inlet / outlet water structure comprising an inlet pipe and a drain pipe. The top surface of the water storage tank is connected to the inlet pipe, and the bottom surface is connected to the drain pipe. The inlet / outlet water structure ensures the efficiency of heat exchange between the molding channel and the input cold water.

[0006] The above-mentioned device for recycling plastic granules has a forming channel inserted into the cooling box. The bottom surface of the cooling box is provided with a groove that connects to the forming channel. The top surface of the forming channel is connected to a lifting ring. The two sides of the cooling box are connected to the circulation pipeline. The detachable forming channel is easy to replace and can be used to meet the requirements of products with different diameters.

[0007] The above-mentioned device for recycling plastic granules has a discharge baffle connected to the top of the cooling box. The discharge baffle receives molten plastic above it. The upward-sloping discharge baffle not only guides the molten plastic but also prevents it from splashing, thus acting as a protective cover, which improves the safety of the equipment and reduces the safety risks of operation.

[0008] The aforementioned device for recycling plastic granules includes a transmission assembly comprising a spur gear, a synchronous transmission belt, and a pulley. One of the spur gears is coaxially connected to the pulley. The power mechanism motor is mounted on a support base and drives the spur gear to rotate via the synchronous transmission belt. The pulley drive has a simple structure, runs smoothly, and the belt will slip under overload, preventing damage to other parts.

[0009] The aforementioned device for recycling plastic granules includes a grading screen assembly comprising a screen and a screen support plate. The screen is connected above the screen support plate. The screen allows for direct screening of the plastic granules by mesh size after pelletizing. This material classification facilitates product processing and categorization. Material passing through a 60-80 mesh filter can be re-blow molded, while material passing through a 40-60 mesh filter meets the quality requirements for injection molding.

[0010] The aforementioned device for recycling plastic granules includes a vibration drive mechanism comprising a connecting plate, a sliding bracket, and a vibrator. The sliding bracket, fitted with an elastic support member, is installed in the base. The top surface of the sliding bracket is provided with a connecting plate, and the bottom surface of the connecting plate is connected to the vibrator in the center. The vibrator, as a vibration source, drives the sliding bracket through the connecting plate, causing the grading screen assembly to vibrate up and down for screening. The elastic support member fitted with the sliding bracket can reduce the wear of the equipment and extend its service life.

[0011] The aforementioned device for recycling plastic granules includes a first feeding port and a second feeding port in its feeding guide structure. Both feeding guide structures are downward-sloping troughs, and the feeding directions of the first and second feeding ports are different. Different feeding directions can better distinguish the screened plastic granules. In the vibrating screening device, the downward-sloping feeding surface not only completes the screening of plastic granules during vibration, but also transforms the vibration into a downward-sloping moving source to promote the movement of plastic granules.

[0012] As described above, the beneficial effects of the device for recycling plastic granules provided by this utility model are as follows: This utility model accelerates the contact speed and efficiency between molten plastic and external cold source through the cooling molding device, shortens the cooling time of plastic, and reduces the floor space of the equipment; the vibrating screening device can screen plastic granules of different mesh sizes, and plastic granules of different sizes are suitable for different plastic processing technologies, saving labor sorting costs and improving production efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the entire utility model from another perspective; Figure 3 This is a partial sectional view of the cooling forming apparatus; Figure 4 This is a partial cross-sectional view of the granulation device; Figure 5 This is an exploded view of the vibrating screening device; Summary of figure labels and their descriptions: 1. Cooling and forming device; 11. Circulation pipe; 12. Circulation pump; 13. Lifting ring; 14. Water inlet pipe; 15. Discharge baffle; 16. Forming channel; 17. Cooling box; 18. Water storage tank; 19. Drainage pipe. 2. Granulation device; 21. Spur gear; 22. Support base; 23. Motor; 24. Synchronous conveyor belt; 25. Pulley; 26. Crushing roller assembly; 27. Protective cover; 3. Vibrating screening device; 31. First discharge port; 32. Second discharge port; 33. Elastic support; 34. Base; 35. Connecting plate; 36. Screen; 37. Screen support plate; 38. Sliding bracket; 39. Vibrator. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0016] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0018] Please see Figure 1 and Figure 2 An apparatus for recycling plastic granules includes a cooling and forming device 1, a granulation device 2, and a vibrating screening device 3. The cooling and forming device 1 includes a cooling circulation system and a forming channel 16. The cooling circulation system consists of a circulation pipe 11, a circulation pump 12, a water storage component, and an inlet and outlet water structure, which are connected by pipelines to form a closed circulation water circuit. The forming channel 16 is located in the inner cavity of a cooling box 17. The granulation device 2 includes a power mechanism, a transmission component, and a crushing roller assembly 26. The power mechanism includes a spur gear 21 and a motor 23. The crushing roller assembly 26 is installed inside a protective cover 27 and is located directly below the cooling and forming device 1. The power mechanism drives the crushing roller assembly 26 to operate through the transmission component. A support base 22 is provided at its bottom. The vibrating screening device 3 includes a vibration drive mechanism, a grading screen assembly, and a feeding guide structure. The grading screen assembly is installed on a base 34 through an elastic support 33 and is located directly below the granulation device 2. The vibration drive mechanism is connected to the screen assembly and drives it to vibrate.

[0019] Please see Figure 3 The water storage component includes a cooling box 17 and a water storage box 18. The water inlet and outlet structure includes a water inlet pipe 14 and a water outlet pipe 19. The top surface of the water storage box 18 is connected to the water inlet pipe, and the bottom surface is connected to the water outlet pipe 19. The water inlet and outlet structure ensures the efficiency of heat exchange between the molding channel 16 and the input cold water.

[0020] The molding channel 16 is inserted into the cooling box 17. The bottom surface of the cooling box 17 is provided with a groove that connects to the bottom surface of the molding channel 16. The top surface of the molding channel 16 is connected to the lifting ring 13. The two sides of the cooling box 17 are connected to the circulation pipe 11. The detachable molding channel 16 is easy to replace and can be used to meet the requirements of products with different diameters.

[0021] The top of the cooling box 17 is connected to the discharge baffle 15. The discharge baffle 15 receives molten plastic. The upward-sloping discharge baffle 15 not only guides the molten plastic, but also prevents the molten plastic from splashing and acts as a protective cover, which improves the safety of the equipment and reduces the safety risks of operation.

[0022] Please see Figure 4 The transmission assembly includes a spur gear 21, a synchronous conveyor belt 24, and a pulley 25. One of the spur gears 21 is coaxially connected to the pulley 25. The power mechanism motor 23 is mounted on the support base 22 and drives the spur gear 21 to rotate through the synchronous conveyor belt 24. The pulley drive has a simple structure, runs smoothly, and the belt will slip when overloaded, which can prevent damage to other parts.

[0023] Please see Figure 5 The grading screen assembly includes a screen 36 and a screen support plate 37. The screen 36 is connected above the screen support plate 37. The screen 36 can directly screen the plastic particles by mesh size after the plastic pellets are cut. The classification of materials is beneficial to the processing and classification of products. The material coming out of the 60 to 80 mesh filter can be blow molded again; the material coming out of the 40 to 60 mesh filter can meet the quality requirements of injection molding.

[0024] The vibration drive mechanism includes a connecting plate 35, a sliding bracket 38, and a vibrator 39. The sliding bracket 38 is fitted with an elastic support member 33 and installed in the base 34. The top surface of the sliding bracket 38 is provided with the connecting plate 35, and the vibrator 39 is connected to the center of the bottom surface of the connecting plate 35. The vibrator 39, as the vibration source, drives the sliding bracket 38 through the connecting plate 35, causing the grading screen assembly to vibrate up and down for screening. The elastic support member 33 fitted with the sliding bracket 38 can reduce the wear of the equipment and extend the service life of the equipment.

[0025] The feeding guide structure includes a first feeding port 31 and a second feeding port 32. Both feeding guide structures are inclined troughs pointing downwards. The feeding directions of the first feeding port 31 and the second feeding port 32 are different. Different feeding directions can better distinguish the screened plastic particles. In the vibrating screening device, the inclined feeding surface not only completes the screening of plastic particles during vibration, but also turns the vibration into an inclined moving source to promote the movement of plastic particles.

[0026] A specific application of this embodiment is as follows: First, insert a molding channel 16 of appropriate diameter, and inject water into the water storage tank 18 through the water inlet pipe 14. At the same time, start the circulation pump 12 to pump water into the cooling tank 17. When the inner cavities of both tanks are filled with cold water, start feeding molten plastic above the feeding baffle. The molten plastic enters the molding channel 16, and at the same time, the cold water in the cooling tank 17 cools down the molten plastic and turns it back into solid strip plastic through heat transfer through the pipe wall. Cold water continuously enters through the water inlet pipe 14 and is output to the cooling tank 17 by the circulation pump 12. The heated water is discharged through the drain pipe 19 of the water storage tank 18. The solid strip plastic enters the granulation device from the bottom surface of the molding channel 16. The motor 23 in the granulation device is started, and the rotational motion is transmitted to a pair of meshing pulleys 25 and synchronous conveyor belts 24. The spur gears 21, a pair of spur gears 21, drive the crushing roller assembly 26 to rotate relative to each other, generating squeezing and shearing forces that divide the solid strip-shaped plastic into small plastic granules. The plastic granules enter the vibrating screening device 3 below the granulation device. When the vibrator 39 is started, the sliding support 38 moves up and down under the action of the vibrator 39. The falling plastic granules are separated into plastic granules of different mesh sizes under the filtration of the screen 36, and discharged through the first discharge port 31 and the second discharge port 32 respectively. The plastic granules of different mesh sizes are applicable to different areas. The material coming out of the 60 to 80 mesh filter can be blow molded again; the material coming out of the 40 to 60 mesh filter can meet the quality requirements of injection molding. The automatic screening design reduces manual intervention and operation, saves labor costs, shortens the process flow, and improves production efficiency.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A device for recycling plastic particles, comprising a cooling and shaping device (1), a pelletizing device (2) and a vibrating screening device (3), characterized in that: The cooling and forming device (1) includes a cooling circulation system and a forming channel (16). The cooling circulation system consists of a circulation pipe (11), a circulation pump (12), a water storage component, and an inlet and outlet water structure. It forms a closed circulation water circuit through pipeline connection. The forming channel (16) is located in the inner cavity of the cooling box (17). The granulation device (2) includes a power mechanism, a transmission component, and a crushing roller assembly (26). The power mechanism includes a spur gear (21) and a motor (23). The crushing roller assembly (26) is installed in the protective cover (27) and is located directly below the cooling and forming device (1). The power mechanism drives the crushing roller assembly (26) to operate through the transmission component. Its bottom is provided with a support base (22). The vibration screening device (3) includes a vibration drive mechanism, a grading screen assembly, and a feeding guide structure. The grading screen assembly is installed on the base (34) through an elastic support (33) and is located directly below the granulation device. The vibration drive mechanism is connected to the screen assembly and drives it to vibrate.

2. The apparatus for recycling plastic particles according to claim 1, wherein: The water storage component includes a cooling box (17) and a water storage box (18). The water inlet and outlet structure includes an inlet pipe (14) and a drain pipe (19). The top surface of the water storage box (18) is connected to the inlet pipe (14), and the bottom surface is connected to the drain pipe (19).

3. The apparatus for recycling plastic particles according to claim 2, wherein: The molding channel (16) is inserted into the cooling box (17). The bottom surface of the cooling box (17) is provided with a groove that connects to the molding channel (16). The top surface of the molding channel (16) is connected to a lifting ring (13). The two sides of the cooling box (17) are connected to the circulation pipe (11).

4. The apparatus for recycling plastic particles according to claim 3, wherein: The top of the cooling box (17) is connected to a discharge baffle (15), which receives molten plastic above it.

5. The apparatus for recycling plastic particles according to claim 1, wherein: The transmission assembly includes a spur gear (21), a synchronous conveyor belt (24), and a pulley (25). One of the spur gears (21) is coaxially connected to the pulley (25). The power mechanism motor (23) is mounted on the support base (22) and drives the spur gear to rotate through the synchronous conveyor belt (24).

6. The apparatus for recycling plastic particles according to claim 1, wherein: The grading screen assembly includes a screen (36) and a screen support plate (37). The screen support plate (37) is connected to the housing of the vibrating screening device (3), and the screen (36) is connected above the screen support plate (37).

7. A device for recycling plastic particles according to claim 6, characterized in that: The vibration drive mechanism includes a connecting plate (35), a sliding bracket (38), and a vibrator (39). The sliding bracket (38) is fitted with an elastic support member (33) and installed in the base (34). The top surface of the sliding bracket (38) is provided with a connecting plate (35), and the bottom surface of the connecting plate (35) is connected to the vibrator (39) in the middle.

8. The apparatus for recycling plastic particles according to claim 5, wherein: The material feeding guide structure includes a first feeding port (31) and a second feeding port (32). Both of the material feeding guide structures are downward inclined grooves, and the feeding directions of the first feeding port (31) and the second feeding port (32) are different.

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