Recycled plastic recycling pretreatment equipment

Abstract

The invention discloses recycled plastic recycling pretreatment equipment which comprises a base, a certain oblique angle is formed between the top face of the base and the ground, a front end base and a rear end base are fixed to the top of the base, a smashing cavity assembly is rotationally arranged between the front end base and the rear end base, and a smashing transmission unit is arranged on one side of the rear end base and comprises a torque motor and two sets of smashing rollers. The two groups of crushing rollers are driven by the torque motor to oppositely rotate on the inner side of the crushing cavity assembly for crushing waste materials, the two groups of crushing rollers are arranged in the same direction and are conical, and the torque motor can drive the crushing cavity assembly to rotate while driving the crushing rollers to rotate; a material guiding mechanism is arranged on the inner side of the smashing cavity assembly and located above the single set of smashing rollers, and the material guiding mechanism is used for guiding fallen materials so that the fallen materials can fall on different area positions of the smashing rollers. The multi-stage crushing effect can be effectively achieved, damage of hard plastic to the crushing rollers and the motor is reduced, and meanwhile multiple-time reciprocating crushing operation of fragments is efficiently achieved in an integrated mode.

Description

Technical Field

[0001] This invention relates to the field of crushing and pretreatment technology, and in particular to a pretreatment device for recycled plastics. Background Technology

[0002] Pre-treatment equipment for recycled plastics is typically used to perform preliminary processing on various recycled plastic products for subsequent recycling. In existing technologies, common equipment mainly uses mechanical crushing, which cuts plastic products into small pieces or granules using rotating blades or rollers for easy conveying and further processing. Some devices are equipped with feeding mechanisms to achieve continuous operation. At the same time, screening components are used to perform preliminary classification of materials. In addition to the crushing stage, existing equipment generally has a washing unit that uses water flow or agitation to remove impurities and surface dirt, ensuring the purity of plastic granules. To facilitate subsequent drying, some equipment is equipped with centrifugal dehydration or hot air drying structures to achieve rapid material processing. In addition, in the conveying and stacking stages, belt conveyors or screw conveyors are often used in conjunction with storage silos to improve overall processing efficiency. The mechanical structure of this type of equipment is mostly modular, which facilitates the connection and expansion of different functional units, thereby adapting to the needs of recycling and reusing different types of plastics. However, the inventors discovered the following problems in the pre-shredding process of this type of plastic waste in the actual operation: 1. In the crushing process of plastic waste, it is usually crushed directly between two sets of crushing rollers, and then a second crushing process is carried out according to the crushing results. Although this operation can improve the crushing quality, for some hard plastics, the crusher needs to meet the requirements of high torque and stronger crushing output. This will not only affect the service life of the crushing rollers, but also damage the output motor. Second, when traditional crushing mechanisms require multiple reciprocating crushing operations, they usually use a conveying device to transport the initially crushed plastic fragments to the upper crushing stage for secondary crushing. This method is complex to operate and requires a large amount of space.

[0003] Therefore, how to provide a pre-treatment equipment for recycled plastics is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One objective of this invention is to provide a pre-treatment device for recycled plastics. This invention can effectively achieve multi-stage crushing, reduce the damage of hard plastics to the crushing rollers and motors, and efficiently integrate multiple crushing operations of fragments.

[0005] According to an embodiment of the present invention, a pretreatment device for recycling plastics includes a base, the top surface of which is at a certain angle to the ground. A front end seat and a rear end seat are fixed on the top of the base. A crushing chamber assembly is rotatably arranged between the front end seat and the rear end seat. A crushing transmission unit is arranged on one side of the rear end seat. The crushing transmission unit includes a torque motor and two sets of crushing rollers. The two sets of crushing rollers rotate in opposite directions under the drive of the torque motor and are used to crush the waste material inside the crushing chamber assembly. The two sets of crushing rollers are arranged in the same direction and are conical. The torque motor drives the crushing rollers to rotate and can also drive the crushing chamber assembly to rotate. A material guiding mechanism is provided inside the crushing chamber assembly and above the single set of crushing rollers. The material guiding mechanism is used to guide the falling material so that it falls onto different areas of the crushing rollers.

[0006] Furthermore, the crushing roller is mounted between the rear end seat and the front end seat. The two ends of the crushing roller are driven in reverse through the first transmission belt assembly. One end of a single crushing roller is connected to a coupling shaft through the second transmission belt assembly. The coupling shaft is mounted on one side of the front end seat and has a fixed transmission tooth at one end.

[0007] Furthermore, the surface of the crushing rollers is toothed, and the relative distance between the two sets of crushing rollers gradually decreases from the front end to the rear end.

[0008] Furthermore, the pulverizing chamber assembly includes a drum chamber and six sets of scrapers. The six sets of scrapers are fixed in a circular array at the end of the drum chamber. A blower is fixed above the rear end seat. A filter screen is installed on the inner surface of the rear end seat near the blower. The six sets of scrapers reciprocate to scrape and wash the filter screen while the drum chamber is rotating.

[0009] Furthermore, a gear ring is fixedly installed on the outer surface of the drum chamber near the transmission teeth. The transmission teeth and the gear ring mesh with each other, and the connecting shaft drives the transmission teeth to rotate while simultaneously driving the drum chamber to rotate between the front and rear seats.

[0010] Furthermore, multiple sets of longitudinal baffles are arranged in a ring on the inner surface of the drum chamber. The longitudinal baffles are fixed to the drum chamber at a 60-degree angle and are longitudinally distributed on the inner side of the drum chamber.

[0011] Furthermore, the inner surface of the drum is provided with multiple sets of transverse baffles, which are distributed transversely. The relative distance between adjacent transverse baffles gradually decreases as the relative distance between the crushing rollers decreases.

[0012] Furthermore, a water storage tank is installed on the top of the base, and the water storage tank is connected to the atomizing guns on the left and right sides of the inner surface of the front base through a water pipe. A discharge end is installed on the lower part of the base near the rear base, and the discharge end has a built-in conveyor belt for discharging materials.

[0013] Furthermore, the material guiding mechanism includes an actuator cylinder and a frame. The frame is slidably mounted on a slide platform fixed between the front end seat and the rear end seat, and one end of the frame is fixed to the output end of the actuator cylinder.

[0014] Furthermore, multiple sets of guide plates are provided inside the slide table. The guide plates are rotatably mounted inside the slide table via rotating shafts on the left and right sides. Meshing teeth are fixed on the rotating shafts on both sides of the guide plates. The upper part of the meshing teeth meshes with the grooves opened on the bottom surface of the frame. The slide table is positioned between the single set of crushing rollers and the drum chamber, and the movement space at this position meets the maximum rotation angle of the guide plates.

[0015] The beneficial effects of this invention are: This invention utilizes a crushing transmission unit. A torque motor drives two sets of crushing rollers to rotate in opposite directions via a first transmission belt assembly. During this process, plastic waste is crushed by the crushing rollers. The crushing rollers are conical in shape and oriented in the same direction. This ensures that after the waste enters the inner side of the drum chamber through the front feed inlet, it first contacts the relatively large distance between the two crushing rollers. The rotation of the crushing rollers provides primary crushing, protecting both the rollers and the torque motor. Simultaneously, the torque motor drives the drum chamber to rotate, causing the waste to rise and fall back between the crushing rollers. Furthermore, the inclined design of the base top allows the material to gradually fall towards a shorter area adjacent to the crushing rollers. This process is repeated to achieve multi-stage crushing. This invention, through its feeding mechanism, allows for the determination of the actual size of the waste fragments produced during the crushing process. The size of the waste fragments will not be gradually crushed by the crushing rollers in the ideal manner. To prevent this, after the roller chamber carries the waste fragments upwards, the actuator can push the frame on the slide table a small distance. At this time, the meshing groove will push the meshing teeth to rotate, and the guide plate will rotate a small angle between the slide tables. Thus, the waste fragments, guided by the guide plate, fall back between the crushing rollers at a greater distance for further crushing until the crushed fragments meet the actual requirements. This invention utilizes a blower mounted on the top of the rear seat. The blower's suction reduces dust generated during crushing within the drum chamber. Simultaneously, a water tank at the top of the base provides an atomized spray effect at the inlet of the front seat. This, combined with the blower's suction, reduces the amount of waste plastic powder dust inside the drum chamber. Furthermore, the rotation of the drum chamber drives the scraper to rotate synchronously, which reciprocates to remove powder and mud from the filter screen below the blower, ensuring the blower's normal operation during extended suction. Moreover, compared to existing technologies, the water tank's atomizer-assisted spraying of the drum chamber further reduces the surface temperature of the crushing roller, thereby extending its service life.

[0016] This invention, through its specially designed crushing chamber assembly, features longitudinal baffles angled within the drum chamber. These baffles, during drum rotation, propel waste material to a higher position before it falls, ensuring efficient feeding for reciprocating crushing. Compared to existing technologies, this design effectively reduces equipment footprint and offers higher integration. Furthermore, multiple transverse baffles are positioned within the drum chamber at progressively decreasing relative distances. The longitudinal and transverse baffles near the front end provide greater space to accommodate waste fragments. This design prevents large-diameter waste from becoming stuck outside the grid formed by the transverse and longitudinal baffles after initial crushing, thus preventing waste from being unable to reach higher positions and significantly improving practical performance. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a pre-treatment device for recycled plastics proposed in this invention. Figure 2 This is a half-sectional view of the base structure of a pre-treatment equipment for recycling plastics proposed in this invention.

[0018] Figure 3 This is a schematic diagram of the connection structure of the crushing unit in a pre-treatment equipment for recycled plastics proposed in this invention.

[0019] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the drum chamber of a pre-treatment equipment for recycled plastics proposed in this invention.

[0020] Figure 5 This is a schematic diagram of the material guiding mechanism of a pre-treatment equipment for recycled plastics proposed in this invention.

[0021] Figure 6 This is a schematic cross-sectional view of the overall structure of a pre-treatment device for recycling plastics proposed in this invention.

[0022] Figure 7 This is a schematic diagram of the front and rear end supports of a pre-treatment equipment for recycled plastics proposed in this invention.

[0023] Figure 8 This is a schematic diagram of the internal structure of the drum chamber of a pre-treatment equipment for recycled plastics proposed in this invention.

[0024] Figure 9 This invention proposes a pretreatment device for recycled plastics. Figure 5 Enlarged schematic diagram of the structure at point A.

[0025] In the picture: Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] refer to Figures 1-9 The system includes a base 1, characterized in that the top surface of the base 1 is at a certain angle to the ground. The inclined base 1 allows all subsequent components installed on the top to be distributed at a certain angle to the horizontal plane. A front end seat 2 and a rear end seat 3 are fixed on the top of the base 1. A crushing chamber assembly 4 is rotatably arranged between the front end seat 2 and the rear end seat 3. The end surface of the crushing chamber assembly 4 is supported by the front end seat 2 and the rear end seat 3 through a roller assembly, which facilitates the rotation operation of the crushing chamber assembly 4. A crushing transmission unit 5 is arranged on one side of the rear end seat 3. The crushing transmission unit 5 includes a torque motor 51 and two sets of crushing rollers 52. The two sets of crushing rollers 52 rotate in opposite directions under the drive of the torque motor 51 and are used to crush waste materials inside the crushing chamber assembly 4. The opposite rotation of the crushing rollers 52 satisfies the traditional crushing operation. The two sets of crushing rollers 52 are arranged in the same direction and are conical. The torque motor 51 drives the crushing rollers 52 to rotate and can also drive the crushing chamber assembly 4 to rotate. The rotation of the crushing chamber assembly 4 can drive the internal waste fragments back to the top of the crushing rollers 52 and be crushed multiple times by the crushing rollers 52. A material guiding mechanism 8 is provided inside the crushing chamber assembly 4 and above the single set of crushing rollers 52. The material guiding mechanism 8 is used to guide the falling material so that it falls on different areas of the crushing rollers 52. Before falling onto the two sets of crushing rollers 52, the waste fragments will first come into contact with the material guiding mechanism 8 and slide down to the designated area under the guidance of the material guiding mechanism 8 to achieve different crushing effects.

[0028] In this embodiment, when the torque motor 51 drives the two sets of crushing rollers 52 to rotate in opposite directions, the plastic waste entering from the feed inlet above the front seat 2 is directly crushed by the crushing rollers 52. Since the two sets of crushing rollers 52 are conical and arranged in the same direction, the relative gap between the two sets of crushing rollers 52 increases as they approach the feed inlet of the front seat 2. This prevents the plastic waste from slipping between the crushing rollers 52 during the initial crushing process, effectively protecting the crushing operation of the crushing rollers 52 and preventing excessively hard plastic from affecting the torque output of the torque motor 51 during the initial crushing stage. The use of the torque motor 51 and the crushing roller 52 is protected. The crushing chamber assembly 4 in the rotating state can drive the waste back to the high position. As mentioned earlier, all the components at the top of the base 1 are designed with inclination. The crushing gap between the crushing roller 52 and the waste falling and rotating feeding process becomes smaller and smaller, so that the pretreatment of plastic waste can be carried out step by step. Finally, the plastic waste is completely crushed. The design of the material guiding mechanism 8 allows the material guiding mechanism 8 to guide the waste fragments back to the crushing area of ​​the crushing roller 52 of the previous stage for secondary crushing, preventing the occurrence of unsatisfactory crushing.

[0029] refer to Figure 3 and Figure 8 The crushing roller 52 is rotatably mounted between the rear end seat 3 and the front end seat 2. The two ends of the crushing roller 52 are driven in reverse by the first transmission belt assembly 53. One end of a single crushing roller 52 is connected to a connecting shaft 55 via a connected second transmission belt assembly 54. The connecting shaft 55 is rotatably mounted on one side of the front end seat 2 and has a fixed transmission tooth 56 at one end. The surface of the crushing roller 52 is toothed, and the relative distance between the two sets of crushing rollers 52 gradually decreases from the front end seat 2 to the rear end seat 3.

[0030] In this embodiment, the rotational mounting of the crushing roller 52 refers to the shaft at the end of the crushing roller 52 being movably mounted on the front end seat 2 and the rear end seat 3 via bearings. The front end seat 2 and the rear end seat 3 are actually fixed to the base 1, thus ensuring the stable rotation of the crushing roller 52 inside the drum chamber 41. In actual operation, the torque motor 51 fixed to the top of the base 1 directly drives the single set of crushing rollers 52 to rotate. The shafts at the ends of the two sets of crushing rollers 52 pass through the front end seat 2 and the rear end seat 3, achieving reverse transmission through the first transmission belt assembly 53. In this way, the two sets of crushing rollers 52 can rotate in opposite directions inside the drum chamber 41, thereby realizing the pre-treatment crushing operation of plastic waste. The end of each set of crushing rollers 52 is also connected to the connecting shaft 55 through the second transmission belt assembly 54. The connecting shaft 55 rotates synchronously under force. During the rotation, the transmission teeth 56 at the end of the connecting shaft 55 mesh with the toothed ring 57 on the surface of the drum chamber 41, causing the drum chamber 41 to rotate between the rear end seat 3 and the front end seat 2 under force, thereby driving the waste to rise again. The overall structure is compact and occupies a small area.

[0031] refer to Figure 2 , Figure 4 , Figure 6 and Figure 8 The pulverizing chamber assembly 4 includes a drum chamber 41 and six sets of scraper blades 44. The six sets of scraper blades 44 are fixed in a circular array at the end of the drum chamber 41. A blower 6 is fixed above the rear end seat 3. A filter screen is installed on the inner surface of the rear end seat 3 near the blower 6. The six sets of scraper blades 44 reciprocate to scrape the filter screen while the drum chamber 41 is rotating. A gear ring 57 is fixed in a circular array on the outer surface of the drum chamber 41 near the transmission gear 56. The transmission gear 56 and the gear ring 57 mesh with each other. The connecting shaft 55 drives the transmission gear 56 to rotate and simultaneously drives the drum chamber 41 to rotate between the front end seat 2 and the rear end seat 3.

[0032] In this embodiment, the scraper 44 is designed so that during the rotation of the drum chamber 41, the scraper 44 can repeatedly scrape and wash the filter screen installed below the blower 6 at the top of the rear seat 3, preventing the occurrence of plastic powder or dust during the waste crushing process inside the drum chamber 41.

[0033] refer to Figure 4 and Figure 8 Multiple sets of longitudinal baffles 43 are arranged in a ring on the inner annular surface of the drum chamber 41. The longitudinal baffles 43 are fixed to the drum chamber 41 at a 60-degree angle and are longitudinally distributed inside the drum chamber 41. Multiple sets of transverse baffles 42 are arranged in a transverse distribution on the inner annular surface of the drum chamber 41. The relative distance between adjacent transverse baffles 42 gradually decreases as the relative distance between the crushing rollers 52 decreases.

[0034] In this embodiment, the longitudinal partition 43 and the transverse partition 42 are fixed to the inner surface of the drum chamber 41 in the longitudinal and transverse directions, respectively. The 60-degree inclination design of the longitudinal partition 43 enables it to effectively move the waste fragments to a high position before they fall. The transverse partition 42 is mainly used to separate different areas inside the drum chamber 41, preventing plastic waste from slipping off the bottom of the inner surface of the drum chamber 41. At the same time, the relative distance between the transverse partitions 42 gradually decreases from the front seat 2 to the rear seat 3. This better meets the needs of large-diameter plastic waste after the initial crushing, allowing it to fall effectively into the compartments of the transverse partition 42 and the longitudinal partition 43, facilitating the longitudinal partition 43 to move the waste upwards. The compartments become smaller towards the rear, satisfying the needs of moving small-diameter plastic waste pieces.

[0035] refer to Figure 1 and Figure 7 A water storage tank 9 is installed on the top of the base 1. The water storage tank 9 is connected to the atomizing guns on the left and right sides of the inner surface of the front seat 2 through a water pipe. A discharge end 7 is installed on the lower part of the base 1 near the rear seat 3. The discharge end 7 has a built-in conveyor belt for discharging materials.

[0036] In this embodiment, an atomizing gun is installed at the feed inlet of the front seat 2, and is connected to a water tank 9 via a water pipe. The water tank 9 can provide water for two sets of atomizing guns, so that the atomized water vapor can prevent dust from being generated inside the drum chamber 41. Combined with the suction of the blower 6, this better meets the actual crushing operation. At the same time, the water vapor can effectively reduce the surface temperature of the crushing roller 52, further improving the service life of the crushing roller 52. After being crushed in multiple stages inside the drum chamber 41, the plastic fragments are sent out by the conveyor belt from the discharge end 7 port below the rear seat 3.

[0037] refer to Figure 5 , Figure 8 and Figure 9The material guiding mechanism 8 includes an actuator cylinder 81 and a frame frame 82. The frame frame 82 is slidably mounted on a slide table 85 fixed between the front end seat 2 and the rear end seat 3. One end of the frame frame 82 is fixed to the output end of the actuator cylinder 81. Multiple sets of guide plates 83 are provided inside the slide table 85. The guide plates 83 are rotatably mounted inside the slide table 85 via rotating shafts on the left and right sides. Engaging teeth 84 are fixed on the rotating shafts on both sides of the guide plates 83. The upper part of the engaging teeth 84 engages with the grooves 86 opened on the bottom surface of the frame frame 82. The slide table 85 is positioned between the single set of crushing rollers 52 and the drum chamber 41, and the movement space at this position meets the maximum rotation angle of the guide plates 83.

[0038] In this implementation scheme, in the actual crushing process, it is inevitable that the crushing effect will be poor. At this time, the frame frame 82 is pushed towards the front seat 2 or pulled towards the rear seat 3 by the actuator cylinder 81. The frame frame 82 will slide on the surface of the slide table 85. At the same time, the groove 86 opened on the bottom surface of the frame frame 82 can drive the meshing teeth 84 on the slide table 85 to rotate. The meshing teeth 84 drive the guide plate 83 to rotate. The synchronous rotation of multiple sets of guide plates 83 can change the direction of the waste falling. More specifically, after the roller chamber 41 carries the waste material upward, the waste material falls onto the surface of the guide plate 83 under the action of gravity. The inclined guide plate 83 can guide the waste material fragments, causing them to slide into the crushing area of ​​the previous crushing roller 52 for repeated crushing, thereby improving the subsequent crushing quality.

[0039] Working principle: First, the plastic waste to be crushed is fed into the crushing chamber assembly 4 through the feed port of the front seat 2. The torque motor 51 starts and drives the two crushing rollers 52 to rotate in opposite directions inside the drum chamber 41 through the transmission connection of the two sets of first transmission belt assemblies 53, thus crushing the waste. The conical crushing rollers 52 design provides only a poor crushing effect in the initial crushing, but effectively protects the torque motor 51 and the crushing rollers 52. At the same time, the water tank 9 supplies water to the atomizing gun at the port of the front seat 2. The atomized water vapor can be... The blower 6 at the top of the rear seat 3 draws in the air and moves inside the drum chamber 41 to prevent dust from being generated during the crushing process. At the same time, the end of the crushing roller 52 drives the connecting shaft 55 to rotate through the second transmission belt assembly 54, and the transmission teeth 56 rotate synchronously. A toothed ring 57 is opened on the surface of the drum chamber 41, and the toothed ring 57 meshes with the transmission teeth 56. In this way, the force on the drum chamber 41 is generated by the rotation between the front seat 2 and the rear seat 3. During the rotation of the drum chamber 41, the scraper 44 at the end can reciprocate to scrape and wash the filter screen at the bottom of the blower 6 to prevent the filter screen from clogging. During the rotation of the drum chamber 41, due to the crisscrossing transverse partitions 42 and longitudinal partitions 43 on the inner surface of the drum chamber 41, the waste fragments are moved back to a higher position and then fall down under the drive of the longitudinal partitions 43. The falling fragments then contact the surface of the guide plate 83. According to the actual crushing effect, the actuator 81 is controlled to advance or retract the frame 82 on the surface of the slide table 85, so that the frame 82 pushes the meshing teeth 84 on both sides of the guide plate 83 through the meshing groove 86. In this way, the guide plate 83 can rotate between the slide tables 85 and change the tilt angle. In this way, the waste fragments can contact different areas of the crushing roller 52 under the guidance of the guide plate 83 to complete repeated crushing. Because the base 1 is set at an inclined angle to the ground, the waste fragments will be more downward than the previous crushing area when they return to the area between the two sets of crushing rollers 52. At the same time, the conical crushing rollers 52 make the relative distance between the two sets of crushing rollers 52 gradually decrease, so the crushing effect will gradually become stronger. Finally, the crushed fragments fall from below the rear seat 3 onto the conveyor belt inside the discharge end 7 and are sent out by the conveyor belt.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pre-treatment device for recycling plastics, comprising a base (1), characterized in that, The top surface of the base (1) is at a certain angle to the ground. The front end seat (2) and the rear end seat (3) are fixed on the top of the base (1). The crushing chamber assembly (4) is rotatably arranged between the front end seat (2) and the rear end seat (3). The crushing transmission unit (5) is arranged on one side of the rear end seat (3). The crushing transmission unit (5) includes a torque motor (51) and two sets of crushing rollers (52). The two sets of crushing rollers (52) rotate in opposite directions under the drive of the torque motor (51) and are used to crush waste materials inside the crushing chamber assembly (4). The two sets of crushing rollers (52) are arranged in the same direction and are conical. The torque motor (51) drives the crushing rollers (52) to rotate and can drive the crushing chamber assembly (4) to rotate at the same time. A material guiding mechanism (8) is provided inside the crushing chamber assembly (4) and above the single crushing roller (52). The material guiding mechanism (8) is used to guide the falling material so that it falls on different areas of the crushing roller (52).

2. The pretreatment equipment for recycled plastics according to claim 1, characterized in that, The crushing roller (52) is rotatably mounted between the rear end seat (3) and the front end seat (2). The two ends of the crushing roller (52) are driven in reverse through the first transmission belt assembly (53). One end of a single crushing roller (52) is connected to the connecting shaft (55) through the connected second transmission belt assembly (54). The connecting shaft (55) is rotatably mounted on one side of the front end seat (2) and one end is fixed with transmission teeth (56).

3. The pretreatment equipment for recycled plastics according to claim 1, characterized in that, The surface of the crushing roller (52) is toothed, and the relative distance between the two sets of crushing rollers (52) gradually decreases from the front end seat (2) to the rear end seat (3).

4. The pretreatment equipment for recycled plastics according to claim 1, characterized in that, The pulverizing chamber assembly (4) includes a drum chamber (41) and six sets of scrapers (44). The six sets of scrapers (44) are fixed in a ring array at the end of the drum chamber (41). A blower (6) is fixed above the rear end seat (3). A filter screen is set on the inner surface of the rear end seat (3) near the blower (6). The six sets of scrapers (44) reciprocate to scrape and wash the filter screen while the drum chamber (41) is rotating.

5. The pretreatment equipment for recycled plastics according to claim 4, characterized in that, A gear ring (57) is fixedly arranged in an annular shape on the outer surface of the roller chamber (41) near the position of the transmission gear (56). The transmission gear (56) and the gear ring (57) mesh with each other. The connecting shaft (55) can drive the transmission gear (56) to rotate while driving the roller chamber (41) to rotate between the front end seat (2) and the rear end seat (3).

6. The pretreatment equipment for recycled plastics according to claim 4, characterized in that, Multiple sets of longitudinal baffles (43) are arranged in a ring on the inner ring surface of the drum chamber (41). The longitudinal baffles (43) are fixed to the drum chamber (41) at a 60-degree angle and are longitudinally distributed on the inner side of the drum chamber (41).

7. The pretreatment equipment for recycled plastics according to claim 4, characterized in that, Multiple sets of transverse partitions (42) are provided on the inner annular surface of the drum chamber (41). The transverse partitions (42) are distributed transversely, and the relative distance between adjacent transverse partitions (42) gradually decreases as the relative distance between the crushing rollers (52) decreases.

8. The pretreatment equipment for recycled plastics according to claim 1, characterized in that, A water storage tank (9) is set on the top of the base (1). The water storage tank (9) is connected to the atomizing guns on the left and right sides of the inner surface of the front seat (2) through a water pipe. A discharge end (7) is set on the lower part of the base (1) near the rear seat (3). The discharge end (7) has a built-in conveyor belt for discharging materials.

9. The pretreatment equipment for recycled plastics according to claim 1, characterized in that, The material guiding mechanism (8) includes an actuator (81) and a frame (82). The frame (82) is slidably mounted on a slide (85) fixed between the front end seat (2) and the rear end seat (3). One end of the frame (82) is fixed to the output end of the actuator (81).

10. A pretreatment device for recycled plastics according to claim 9, characterized in that, Multiple sets of guide plates (83) are provided inside the slide table (85). The guide plates (83) are rotatably set inside the slide table (85) via the rotating shafts on the left and right sides. The rotating shafts on both sides of the guide plates (83) are fixed with meshing teeth (84). The meshing teeth (84) mesh with the grooves (86) opened on the bottom surface of the frame frame (82). The position of the slide table (85) is close to the single set of crushing rollers (52) and the drum chamber (41), and the movement space at this position meets the maximum rotation angle of the guide plates (83).

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