Plastic particle production equipment for recycling based on resin plastic

Abstract

The invention relates to the technical field of resin plastic recycling, and discloses plastic particle production equipment for recycling based on resin plastics, a first conveying frame and a second conveying frame are sequentially arranged in the material flowing direction, and a shredding machine, a material spreading mechanism, a material distributing mechanism and a near infrared spectrum sorting machine are sequentially installed on the first conveying frame; the screening mechanism is arranged at the joint of the first conveying frame and the second conveying frame and is used for receiving the plastic fragments sorted by the near infrared spectrum sorting machine and performing impurity separation; the pelletizer is arranged below a downstream outlet of the screening mechanism and is used for cutting the screened plastic fragments into particles; according to the near infrared spectrum sorting machine, the material spreading mechanism ensures that the materials are monolayered, the material distributing mechanism realizes one-by-one directional feeding of the materials, the detection accuracy and efficiency of the near infrared spectrum sorting machine are greatly improved, the material screening mechanism quickly and accurately divides and rejects the materials containing impurities according to the real-time detection result, and the purity of the materials entering the granulation link is ensured.

Description

Technical Field

[0001] This invention relates to the technical field of resin plastic recycling, and in particular to a plastic pellet production equipment for recycling resin plastics. Background Technology

[0002] In the process of resin plastic recycling, near-infrared (NIR) spectral separators are key equipment for separating impurities. This equipment uses near-infrared spectroscopy technology to accurately identify different components and impurities in resin plastics. During the identification process, the near-infrared spectral separator emits near-infrared light of specific wavelengths. This light penetrates the resin plastic material and interacts with the chemical components within it. Based on the material's absorption, reflection, or transmission characteristics of different wavelengths of light, the separator can quickly analyze the types and amounts of impurities in the plastic.

[0003] To achieve efficient impurity separation, near-infrared spectral sorting machines are typically equipped with high-precision sensors and advanced algorithms. The sensors are responsible for capturing the signals generated by the interaction between near-infrared light and the plastic material, and transmitting these signals to the processing unit. The processing unit then uses built-in algorithms to analyze and process the signals, thereby accurately determining the distribution and properties of impurities in the plastic. Based on this information, the sorting machine can automatically adjust the sorting parameters to ensure that impurities are effectively separated.

[0004] However, in the current process, plastic fragments that have undergone primary crushing often enter the sorting process in a stacked state, resulting in insufficient penetration depth of the NIR spectrum, making it difficult to effectively identify the lower layer of impurities (such as PVC fragments, metal particles, or hard foreign objects such as sand and gravel) covered by the upper layer of fragments. If these undetected impurities enter the subsequent fine crushing process, they will violently collide with the blades during the high-speed cutting process of the pelletizer. This can lead to increased blade wear and affect the uniformity of the particles, or even cause the blades to break or the spindle to deform. This not only increases the equipment maintenance cost but also causes fluctuations in the quality of recycled plastics. Summary of the Invention

[0005] The purpose of this invention is to provide a resin-based plastic recycling pellet production equipment to solve the problems in the prior art.

[0006] The present invention is implemented as follows: a plastic pellet production equipment for recycling based on resin plastic includes: a first conveyor frame and a second conveyor frame arranged sequentially along the material flow direction, wherein a shredder, a spreading mechanism, a separating mechanism and a near-infrared spectral separator are sequentially installed on the first conveyor frame.

[0007] The screening mechanism is located at the junction of the first conveyor frame and the second conveyor frame, and is used to receive plastic fragments after being sorted by the near-infrared spectroscopy separator and to separate impurities.

[0008] A granulator is located below the downstream outlet of the screening mechanism and is used to cut the screened plastic fragments into granules.

[0009] The spreading mechanism is located in the first conveyor frame between the shredder and the distributing mechanism, and is used to spread the shredded plastic into a single thin layer.

[0010] The material distribution mechanism is located between the material spreading mechanism and the near-infrared spectral sorting machine, and is used to feed the single-layer plastic grid into the feed inlet of the near-infrared spectral sorting machine one by one in a directional manner.

[0011] Preferably, the screening mechanism includes a support shaft arranged horizontally along the material flow direction, and a plurality of guide plates are sleeved on the outside of the support shaft;

[0012] The screening mechanism also includes an electromagnetic component located below the guide plate and corresponding to the guide plate. A pull rod is connected between the telescopic part of the electromagnetic component and the guide plate, and a spring is also sleeved on the outside of the pull rod.

[0013] Preferably, the material distribution mechanism includes a material distribution plate with a fan-shaped guide groove on the side facing away from the near-infrared spectral sorter, and a notch in the middle of the guide groove;

[0014] The feed inlet of the near-infrared spectral separator is equipped with baffles, which are evenly distributed across the partitions.

[0015] The width of the opening matches the spacing between the partitions, forming a material orientation channel.

[0016] Preferably, telescopic push rods are installed on both sides of the first conveyor frame, and guide wheels are provided on the telescopic part;

[0017] The two telescopic push rods abut against the arc-shaped wall of the guide groove via guide wheels;

[0018] The material is driven by alternating extension and retraction to move the material distribution plate horizontally back and forth, allowing the material to pass through the gaps between different partitions in sequence and enter the separator.

[0019] Preferably, the material spreading mechanism includes:

[0020] Two sets of support plates, with two fixed rollers and two moving rollers arranged in parallel between them;

[0021] A spreading belt fitted between the stationary and moving rollers;

[0022] The brackets connecting the two ends of the fixed roller and the moving roller, and the brackets at both ends are also connected by support rods.

[0023] Preferably, the surface of the support rod is provided with a clunking strip, and the inner wall of the spreading belt is provided with a mating strip;

[0024] The pausing strip and the mating strip are made of hard silicone.

[0025] The surface of the spreading belt is evenly distributed with paddles to correct and break up stacked materials.

[0026] Preferably, one of the support plates is provided with a spreading motor and a first transmission rod, and the output shaft of the spreading motor is connected to the first transmission rod through a meshing gear;

[0027] The output shaft of the spreading motor and the first transmission rod drive two fixed rollers via belts.

[0028] Preferably, the inner wall bearing of another support plate is connected to a second transmission rod, and is connected to the first transmission rod via a belt;

[0029] The other end of the second transmission rod is fitted with a rotating wheel, and the eccentric shaft of the rotating wheel is connected to a connecting rod, and a push-pull rod is connected to the shaft between the two moving rollers through the connecting rod.

[0030] The beneficial effects of the resin-based plastic pellet production equipment disclosed in this invention are as follows:

[0031] 1. The material spreading mechanism of the present invention ensures that the material is in a single layer, and the material distribution mechanism realizes the one-to-one directional feeding of the material, which greatly improves the detection accuracy and efficiency of the near-infrared spectral sorting machine. The material screening mechanism quickly and accurately diverts and removes impurities based on real-time detection results, ensuring the purity of the material entering the granulation stage.

[0032] 2. The vibration and reciprocating motion of the spreading mechanism powerfully disperse the material and prevent it from accumulating during conveying. The height limitation and guiding design of the material distribution mechanism effectively prevents the material from accumulating and blocking at the sorting inlet. Moreover, the spreading mechanism only requires a single motor to synchronously drive two sets of belts in opposite directions and realize the vertical reciprocating motion of the moving roller, which significantly simplifies the drive structure and improves the stability and reliability of the equipment operation.

[0033] This invention features a highly automated and continuous process from crushing, spreading, separating, and testing to screening and granulation, which improves recycling efficiency and particle quality. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a resin-based plastic pellet production equipment provided in an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram from another perspective of a resin-based plastic pellet production equipment provided in an embodiment of the present invention.

[0036] Figure 3 This invention provides an embodiment of a resin-based plastic pellet production equipment for recycling. Figure 2 A magnified internal view of the structure at point A in the diagram;

[0037] Figure 4 This is a partial bottom view schematic diagram of a resin-based plastic granule production equipment provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the powder mechanism and the spreading mechanism of a resin-based plastic pellet production equipment for recycling, provided in an embodiment of the present invention.

[0039] Figure 6 This is a partial structural diagram of the material spreading mechanism of a resin-based plastic granule production equipment according to an embodiment of the present invention.

[0040] Figure 7 This is a partial internal view of the material spreading mechanism of a resin-based plastic granule production equipment according to an embodiment of the present invention.

[0041] Marker explanation:

[0042] 1. First conveyor frame; 2. Shredder; 3. Near-infrared spectral sorter; 4. Second conveyor frame; 5. Screening mechanism; 6. Granulator; 7. Distributing mechanism; 8. Spreading mechanism;

[0043] 31. Baffle; 311. Partition;

[0044] 51. Support shaft; 52. Guide plate; 53. Electromagnetic component; 54. Tie rod; 55. Spring;

[0045] 71. Material distribution plate; 72. Guide groove; 73. Telescopic push rod; 74. Notch;

[0046] 731. Guide wheel;

[0047] 81. Support plate; 82. Fixed roller; 83. Moving roller; 84. Spreading belt; 85. Spreading motor; 86. First transmission rod; 87. Second transmission rod; 88. Rotary wheel; 89. Support frame;

[0048] 841. Fitting strip; 842. Paddle;

[0049] 881. Connecting rod; 882. Push-pull rod;

[0050] 891. Support rod; 892. Flicker bar. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0052] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0053] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0054] In this embodiment:

[0055] Reference Figures 1-2 The diagram shows a preferred embodiment of the present invention.

[0056] The equipment for producing recycled plastic pellets based on resin plastics in this embodiment includes: a first conveyor frame 1 and a second conveyor frame 4 arranged sequentially along the material flow direction. A shredder 2, a spreading mechanism 8, a separating mechanism 7 and a near-infrared spectral separator 3 are sequentially installed on the first conveyor frame 1.

[0057] The screening mechanism 5 is located at the junction of the first conveyor frame 1 and the second conveyor frame 4, and is used to receive plastic fragments after being sorted by the near-infrared spectral separator 3 and to separate impurities.

[0058] Granulator 6, as a terminal processing device, is located below the downstream outlet of the screening mechanism 5 and is equipped with a multi-blade rotating blade assembly for cutting the screened plastic fragments into recycled granules.

[0059] Among them, reference Figures 3-4As shown, the screening mechanism 5 includes a horizontally arranged support shaft 51 along the material flow direction. Several guide plates 52 are sleeved on the outside of the support shaft 51. The screening mechanism 5 also includes an array of electromagnetic components 53 positioned below the guide plates 52 and corresponding to them. A pull rod 54 connects the telescopic part of the core of the electromagnetic component 53 to the guide plate 52. A spring 55 is also sleeved on the outside of the pull rod 54. During operation, when the near-infrared spectral separator 3 detects impurities in the material, the electromagnetic component 53 at the position corresponding to the flow direction of the material with impurities is instantaneously energized and retracts. The pull rod 54 of its telescopic part pulls the end of the guide plate 52, causing the end of the guide plate 52 to rotate at an angle of 15°-30° along the support shaft 51 and tilt to fit against it. Above the first conveyor frame 1, a seamless guide slope is formed with the surface of the first conveyor frame 1, so that the material containing impurities is slidably guided onto the second conveyor frame 4 through the guide plate 52; conversely, when no impurities are detected in the material after passing through the near-infrared spectral separator 3, the electromagnetic component 53 is de-energized, and under the action of the spring 55, the spring 55 forcefully rebounds and pushes the guide plate 52 up to an elevation angle of 45°-60°, and the guide plate 52 at the end of the pull rod 54 is pushed outward, so that its end is no longer in contact with the top of the first conveyor frame 1, and a feeding gap is formed between the end of the first conveyor frame 1 and the raised guide plate 52. The material without detected impurities will then fall vertically into the granulator 6 for granulation through the feeding gap between the first conveyor frame 1 and the guide plate 52.

[0060] Furthermore, refer to Figures 5-7 As shown, the spreading mechanism 8 is located in the first conveyor frame 1 between the shredder 2 and the material distribution mechanism 7, and is used to spread the shredded plastic into a single layer of thin material. The spreading mechanism 8 includes: two sets of support plates 81 symmetrically arranged and installed on the inner side of the first conveyor frame 1, with two fixed rollers 82 and two moving rollers 83 arranged in parallel between them, and the fixed rollers 82 and the support plates 81 connected by bearings; a spreading belt 84 sleeved on the fixed rollers 82 and the moving rollers 83; a bracket 89 connecting the two ends of the fixed rollers 82 and the moving rollers 83, and a support rod 891 connected between the brackets 89 at both ends.

[0061] The support rod 891 is densely covered with trapezoidal cross-section pawls 892, and the inner wall of the spreading belt 84 is provided with shark tooth-shaped mating strips 841. The pawls 892 and mating strips 841 are made of hard silicone. The surface of the spreading belt 84 is evenly distributed with paddles 842. During the transmission of the spreading belt 84 on the fixed roller 82 and the moving roller 83, the mating strips 841 on its inner side will intermittently contact / rub against the pawls 892, generating intermittent impacts or resistance changes, which in turn causes local vibration of the spreading belt 84. This vibration is transmitted to the surface of the conveyor belt of the first conveyor frame 1 through the paddles 842, realizing the dispersing of the stacked materials above it.

[0062] Furthermore, the paddle 842 is inclined and has a slightly curved shovel shape, so that when the paddle 842 vibrates, it can not only generate a horizontal component force to actively correct the material, but also use its curvature to gently comb the tangled strips, reducing the probability of them accumulating. This allows the paddle 842 to generate a horizontal component force when vibrating and actively correct the material.

[0063] Among them, the paving belt 84 adopts an antistatic coating to reduce the probability of cross-contamination caused by electrostatic adsorption of materials, ensuring the single-layer paving effect.

[0064] In order to enable the two sets of spreading belts 84 to drive synchronously in opposite directions, one of the support plates 81 is equipped with a spreading motor 85 and a first transmission rod 86. The output shaft of the spreading motor 85 is connected to the first transmission rod 86 through a meshing gear. The output shaft of the spreading motor 85 and the first transmission rod 86 drive two fixed rollers 82 respectively through belts.

[0065] Furthermore, in order to improve the material dispersing efficiency, a second transmission rod 87 is connected to the inner wall bearing of another support plate 81, and is connected to the first transmission rod 86 via a belt. The other end of the second transmission rod 87 is sleeved with a rotating wheel 88. The eccentric shaft of the rotating wheel 88 is connected to a connecting rod 881, and a push-pull rod 882 is connected to the shaft between the two moving rollers 83 via the connecting rod 881. When the spreading motor 85 drives the two sets of spreading belts 84 to drive synchronously in opposite directions, it simultaneously drives the rotating wheel 88 to rotate via the first transmission rod 86. During the rotation of the rotary wheel 88, its eccentric structure, through connecting rod 881 and two push-pull rods 882, drives two sets of moving rollers 83 to reciprocate in a fan-shaped motion along the fixed roller 82. This not only enhances the material dispersing effect of the spreading belt 84, but also further ensures that the material can be evenly distributed during the conveying process, effectively preventing the accumulation and blockage of the material during the conveying process. Through the single drive of the spreading motor 85, the synchronous transmission of the spreading belt 84 and the reciprocating motion of the moving rollers 83 are realized, simplifying the drive structure of the equipment and improving the stability and reliability of the equipment.

[0066] The material distribution mechanism 7 is located between the material spreading mechanism 8 and the near-infrared spectral sorting machine 3, and is used to directionally feed the single-layer plastic grid into the feed inlet of the near-infrared spectral sorting machine 3 one by one. The material distribution mechanism 7 includes a material distribution plate 71, which has a fan-shaped guide groove 72 on the side facing away from the near-infrared spectral sorting machine 3, and a notch 74 in the middle of the guide groove 72. The height of the guide groove 72 is greater than the winch clearance of the shredder 2 to avoid the material spread by the material spreading mechanism 8 from clogging the guide groove 72.

[0067] An infrared sensor is installed at the notch 74. The trigger condition for the movement of the notch 74 of the material distribution plate 71 is to confirm that the tail end of the material has passed through the notch 74, so as to avoid the material from getting stuck.

[0068] The feed inlet of the near-infrared spectral separator 3 is equipped with a baffle 31, on which partitions 311 are evenly distributed. The width of the notch 74 matches the spacing of the partitions 311, forming a material orientation channel.

[0069] like Figure 5 As shown, telescopic push rods 73 are installed on both sides of the first conveyor frame 1, and guide wheels 731 are provided on their telescopic parts. The two telescopic push rods 73 abut against the arc-shaped wall of the guide groove 72 through the guide wheels 731, and drive the material distribution plate 71 to move horizontally back and forth by alternating telescopic movement, so that the material distribution plate 71 slides back and forth from left to right, and the notch 74 is placed in different gaps of the partition plate 311 respectively. The material passes through the gaps of the partition plate 311 in sequence through the notch 74 and enters the separator (the remaining material is blocked and guided by the concave arc-shaped surface of the guide groove 72 (converging from both sides of the arc-shaped surface to the center of the notch 74), and slides closely against the concave arc-shaped surface of the guide groove 72 under the continuous push of the conveyor belt of the first conveyor frame 1 until it moves to the position of the notch 74. At the same time, the upper edge of the guide groove 72 is only slightly higher than the conveying surface, allowing only a single layer of material to pass through, effectively preventing the accumulation of material in front of the material distribution plate 71), thereby improving the screening accuracy of the near-infrared spectral separator 3 and facilitating the screening of materials with impurities.

[0070] The two telescopic push rods 73 extend and retract alternately according to a preset program or sensor signal (such as a material detection sensor), driving the material sorting plate 71 to reciprocate horizontally at a rhythm that matches the conveying speed of the first conveyor frame 1. This ensures that the opening 74 aligns with the gaps of different partitions 311 at the appropriate time when the material flow arrives, ensuring that the material can pass through the opening 74 one by one through the corresponding gaps of the partitions 311 and enter the sorting machine in an orderly manner.

[0071] This scheme first crushes the material (waste resin plastic) using a shredder 2, and then spreads it into a single layer by a spreading mechanism 8 (through the reciprocating motion of a vibrating belt and a moving roller 83). The single layer of material enters the distribution mechanism 7, where the reciprocating opening 74 cooperates with the separator baffle 311 to guide the material one by one into the near-infrared spectral separator 3 for impurity detection. After detection, the screening mechanism 5 dynamically acts according to the sorting results: when impurities are detected, the corresponding guide plate 52 rotates downward to form a slide, guiding the impurity-containing material into the second conveyor frame 4 for removal; when no impurities are detected, the guide plate 52 is raised to form a gap, allowing the pure fragments to fall into the downstream granulator 6 to be cut into granules.

[0072] The material spreading mechanism 8 of this invention ensures that the material is in a single layer, and the material distribution mechanism 7 realizes the one-to-one directional feeding of the material, which greatly improves the detection accuracy and efficiency of the near-infrared spectral sorting machine 3. The material screening mechanism 5 quickly and accurately diverts and removes impurities based on real-time detection results, ensuring the purity of the material entering the granulation stage.

[0073] The vibration of the spreading mechanism 8 and the reciprocating motion of the moving roller 83 powerfully disperse the material and prevent it from accumulating during conveying. The height limitation and guiding design of the material distribution mechanism 7 effectively prevents the material from accumulating and blocking at the sorting inlet. Moreover, the spreading mechanism 8 only requires a single motor to synchronously drive two sets of belts in opposite directions and realize the vertical reciprocating motion of the moving roller 83, which significantly simplifies the drive structure and improves the stability and reliability of the equipment operation.

[0074] This invention features a highly automated and continuous process from crushing, spreading, separating, and testing to screening and granulation, which improves recycling efficiency and particle quality.

[0075] In this embodiment, the discharge port of the shredder 2 is equipped with a controllable grid plate, which can limit the size of the crushed material to a relatively uniform range to avoid the generation of excessively large flakes or excessively long strips. This is a well-known prior art in the field, and will not be described in detail in this solution.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for producing recycled plastic pellets based on resin plastics, characterized in that, include: A first conveyor frame (1) and a second conveyor frame (4) are arranged sequentially along the material flow direction. A shredder (2), a spreading mechanism (8), a separating mechanism (7) and a near-infrared spectral separator (3) are installed sequentially on the first conveyor frame (1). The screening mechanism (5) is located at the junction of the first conveyor frame (1) and the second conveyor frame (4) and is used to receive plastic fragments after being sorted by the near-infrared spectral sorter (3) and to separate impurities. A granulator (6) is located below the downstream outlet of the screening mechanism (5) and is used to cut the screened plastic fragments into granules. The spreading mechanism (8) is located in the first conveyor frame (1) between the shredder (2) and the material distribution mechanism (7), and is used to spread the shredded plastic into a single layer of thin material. The material distribution mechanism (7) is located between the material spreading mechanism (8) and the near-infrared spectral sorting machine (3) and is used to feed the single-layer plastic grid into the feed port of the near-infrared spectral sorting machine (3) one by one.

2. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 1, characterized in that, The screening mechanism (5) includes a support shaft (51) arranged horizontally along the material flow direction, and a plurality of guide plates (52) are sleeved on the outside of the support shaft (51); The screening mechanism (5) also includes an electromagnetic component (53) located below the guide plate (52) and corresponding to the guide plate (52). A pull rod (54) is connected between the telescopic part of the electromagnetic component (53) and the guide plate (52). A spring (55) is also sleeved on the outside of the pull rod (54).

3. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 1, characterized in that, The material distribution mechanism (7) includes a material distribution plate (71), which has a fan-shaped guide groove (72) on the side facing away from the near-infrared spectral sorter (3), and a notch (74) is provided in the middle of the guide groove (72); The near-infrared spectral separator (3) has a baffle (31) at the feed inlet, and the baffle (31) is evenly distributed with partitions (311); The width of the opening (74) matches the spacing of the partition (311), forming a material orientation channel.

4. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 3, characterized in that, The first conveyor frame (1) is equipped with telescopic push rods (73) on both sides, and its telescopic part is provided with guide wheels (731); The two telescopic push rods (73) abut against the arc-shaped wall of the guide groove (72) through the guide wheel (731); By alternately extending and retracting the material distribution plate (71) to reciprocate horizontally, the material passes through the gaps of different partitions (311) through the opening (74) and enters the sorting machine.

5. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 1, characterized in that, The material spreading mechanism (8) includes: Two sets of support plates (81) are arranged in parallel between two fixed rollers (82) and two moving rollers (83); A spreading belt (84) is fitted onto the fixed roller (82) and the moving roller (83); A support rod (891) is connected between the bracket (89) connecting the two ends of the fixed roller (82) and the moving roller (83) and the bracket (89) at both ends.

6. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 5, characterized in that, The support rod (891) has a jog strip (892) on its surface, and the material spreading belt (84) has a mating strip (841) on its inner wall; The pausing strip (892) and the mating strip (841) are made of hard silicone. The surface of the spreading belt (84) is evenly distributed with paddles (842) for correcting the broken stacked materials.

7. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 5, characterized in that, One of the support plates (81) is equipped with a spreading motor (85) and a first transmission rod (86), and the output shaft of the spreading motor (85) is connected to the first transmission rod (86) through a meshing gear; The output shaft of the spreading motor (85) and the first transmission rod (86) drive two fixed rollers (82) respectively via belts.

8. The equipment for producing recycled plastic pellets based on resin plastics as described in claim 7, characterized in that, Another support plate (81) has a bearing on its inner wall connected to a second transmission rod (87), which is connected to the first transmission rod (86) via a belt. The other end of the second transmission rod (87) is fitted with a rotating wheel (88), and the eccentric part of the rotating wheel (88) is connected to a connecting rod (881), and a push-pull rod (882) is connected between the connecting rod (881) and the two moving rollers (83) via the rotating shaft.

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