Plastic gear waste recovery equipment

Abstract

The invention discloses plastic gear waste recovery equipment, and belongs to the technical field of waste recovery, the plastic gear waste recovery equipment comprises a treatment box, the left side of the top of the treatment box is pivotally provided with a downward inclined guide plate, and the tail end of the guide plate extends to a crushing chamber inlet in the treatment box; an eccentric crushing roller is transversely arranged in the crushing chamber, rotating shafts at the two ends of the eccentric crushing roller penetrate through the side wall of the treatment box and are driven by an eccentric transmission mechanism to rotate, and the eccentric crushing roller is configured to extrude and crush plastic gears through eccentric movement; efficient separation of metal and plastic and granularity control of plastic fragments are achieved through cooperative extrusion and crushing of the eccentric crushing roller and the adjustable jaw plate assembly in combination with magnetic separation-airflow multi-stage separation and coaxial reverse cutting. The device has the advantages of high separation rate, high automation degree and uniform discharging, and is suitable for fine recovery of gears with complex structures.

Description

Technical Field

[0001] The invention belongs to the technical field of waste recycling, and in particular relates to a recycling device for separating metal and plastic components in plastic gears and achieving crushing and sorting. Background Art

[0002] Plastic gears are widely used in the fields of machinery, electronics, etc. They are usually composed of a plastic matrix and a metal insert. Scrapped plastic gears need to be recycled, but the existing technology still has the following problems: 1. Low separation efficiency: Traditional crushing equipment is difficult to effectively separate metals and plastics, resulting in complicated subsequent sorting processes; 2. Insufficient sorting accuracy: The magnetic separation and air flow separation are not closely combined, and the metal residue rate is high; 3. Uneven crushing particle size: Conventional cutting devices cannot control the size of plastic fragments, affecting recycling.

[0003] Therefore, there is an urgent need for an integrated equipment that integrates crushing, sorting and particle size control. Summary of the invention

[0004] 1. Technical problems to be solved: In view of the problems existing in the prior art, the present invention provides a plastic gear waste recycling device, aiming to solve the problems of low metal / plastic separation efficiency, insufficient sorting accuracy and uneven crushing particle size in the prior art.

[0005] 2. Technical solution: To solve the above problems, the present invention adopts the following technical solutions.

[0006] A plastic gear waste recycling device comprises a processing box, wherein a downwardly inclined material guide plate is pivotally mounted on the left side of the top of the processing box, and the end of the material guide plate extends to the entrance of a crushing chamber inside the processing box; An eccentric crushing roller is arranged transversely in the crushing chamber, and the rotating shafts at both ends of the eccentric crushing roller penetrate the side wall of the processing box and are driven to rotate through an eccentric transmission mechanism, and are configured to perform extrusion crushing on the plastic gear through eccentric movement; An adjustable jaw plate assembly is provided on the right side of the top of the processing box, including: An arc-shaped base is pivotally connected to the inner wall of the processing box, and a fixed jaw plate opposite to the eccentric crushing roller is fixedly connected to the inner surface of the base; An arc-shaped splash shield is arranged above the fixed jaw plate, and a tapered feeding channel is formed between the splash shield and the fixed jaw plate; A hydraulic adjustment assembly arranged on the side wall of the processing box comprises a trapezoidal stopper in sliding contact with the back side of the base and a hydraulic push rod driving the stopper to rise and fall, and is configured to adjust the crushing distance between the fixed jaw plate and the eccentric crushing roller by changing the position of the trapezoidal stopper; A sorting channel is provided below the crushing chamber, including: A first inclined guide plate fixedly mounted on the inner wall of the processing box; The magnetic separation assembly disposed opposite to the first inclined guide plate comprises: A mounting housing having an internal cavity, wherein a permanent magnetic roller is disposed in the cavity; A spectrum detector arranged below the permanent magnetic drum, and a metal separation surface and a detection surface arranged along the sorting channel; A material separator plate that can slide laterally, which separates the sorting channel into a metal guide channel connected to the metal discharge port and a plastic guide channel connected to the plastic discharge port; The bottom of the processing box is provided with an airflow sorting component, including: The diversion base is arranged obliquely, and a breathable plate is provided on the surface of the base; An airflow chamber disposed inside the flow guide base and a blower connected to the airflow chamber are configured to spray airflow upward through the air permeable plate to achieve secondary separation of metal and plastic; A coaxial reverse cutting assembly is provided below the outlet of the airflow sorting assembly, comprising: A mounting bracket fixed to the inner wall of the processing box; A dual shaft drive assembly mounted on the mounting bracket, having a counter-rotating hollow drive shaft and a solid drive shaft; The high-speed cutting disc and the screen drum connected to the hollow drive shaft and the solid drive shaft respectively are configured to perform reverse shearing and crushing on the plastic fragments and grade the materials through the screen drum.

[0007] A further improvement is that the eccentric transmission mechanism includes a motor base fixed to the side wall of the processing box, a drive motor installed on the motor base, a main drive wheel fixed to the output shaft of the drive motor, and an eccentric wheel connecting the main drive wheel and the rotating shaft of the eccentric crushing roller through a synchronous belt, wherein the eccentric distance of the eccentric wheel is 5-15mm.

[0008] A further improvement is that the hydraulic adjustment assembly also includes a guide rail arranged on the side wall of the processing box, the trapezoidal limit block is slidably matched with the guide rail through a slider, and the piston rod end of the hydraulic push rod is provided with a bearing that rolls in contact with the inclined surface of the trapezoidal limit block.

[0009] A further improvement is that the magnetic separation component also includes a plurality of high-pressure air nozzles distributed in an array on the side wall of the mounting shell, the spray direction of the high-pressure air nozzles is toward the metal flow guide channel and is at an elevation angle of 20-40° to the horizontal plane, and the spectrometer is electrically connected to the control valve of the high-pressure air nozzle to adjust the airflow intensity according to the detection results.

[0010] A further improvement is that the partition plate is slidably connected to the processing box through a linear slide rail on the side wall, and is connected to an electric push rod to drive its lateral movement, and the outer wall of the processing box is provided with a scale to display the displacement of the partition plate.

[0011] A further improvement is that, in the air flow sorting component, the inclination angle of the guide base is adjustable in the range of 10-25°, the air outlet speed of the blower is linked to the inclination angle of the guide base, and the surface of the air permeable plate is provided with a wavy guide pattern with a height of 2-5 mm.

[0012] A further improvement is that the dual-axis drive device comprises: A first transmission gear and a second transmission gear meshing with each other are arranged in the sealed housing, and the number of teeth of the second transmission gear is 1-3 less than that of the first transmission gear; An upper gear plate connected to the first transmission gear and a lower gear plate connected to the second transmission gear; The hollow drive shaft is fixedly connected to the lower gear disc and drives the screen drum to rotate at a first speed; The solid drive shaft is fixedly connected to the upper gear disc and drives the high-speed cutting disc to rotate at a second rotation speed opposite to the first rotation speed.

[0013] A further improvement is that the surface of the guide rail is provided with a wear-resistant coating, and the inclined surface angle of the trapezoidal limit block is 30-45°.

[0014] A further improvement is that the surface of the screen drum is evenly distributed with screen holes of 3-5 mm in diameter, and its outer wall is fixed with auxiliary cutting blades arranged alternately with the high-speed cutting disc; The high-speed cutting disc and the auxiliary cutting blade of the screen drum are internally integrated with electric heating elements, which are connected to an external power supply through conductive slip rings built into the hollow drive shaft and the solid drive shaft; The electric heating element can heat the blade during the cutting process to soften the plastic substrate to reduce shear resistance; A temperature sensor is installed on the inner wall of the processing box to monitor the temperature of the cutting area in real time, and dynamically adjust the power of the electric heating element through the PID controller to stabilize the temperature within the range of 80-150°C to avoid overheating and carbonization of the plastic.

[0015] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: (1) High-efficiency separation: Through multi-stage linkage of eccentric crushing and magnetic separation-air flow separation, the metal separation rate is ≥98%.

[0016] (2) Intelligent control: Spectral detection feedback adjusts the position of the partition plate and the airflow intensity to adapt to different material proportions.

[0017] (3) Controllable particle size: The coaxial reverse cutting and the screen blade work together to ensure the uniformity of plastic fragments (particle size deviation ≤ 5%).

[0018] (4) Improved cutting efficiency: By heating and softening the plastic, blade wear is reduced and the uniformity of fragment size is improved.

[0019] (5) Intelligent temperature control: Avoid plastic degradation caused by excessive temperature and ensure the performance of recycled materials.

[0020] It should be noted that the structures not introduced in the present invention are the same as the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the entire interior of the present invention; Figure 3 It is a structural schematic diagram of the eccentric transmission mechanism of the present invention; Figure 4 It is a structural schematic diagram of the adjustable jaw plate assembly of the present invention; Figure 5 It is a structural schematic diagram of the magnetic separation component of the present invention; Figure 6 It is a structural schematic diagram of the airflow sorting component of the present invention; Figure 7 It is a structural schematic diagram of the coaxial reverse cutting assembly of the present invention; Figure 8 It is a structural schematic diagram of the dual-axis driving device of the present invention.

[0022] Description of the numbers in the figure: 1. Processing box; 2. Material guide plate; 3. Eccentric crushing roller; 4. Eccentric transmission mechanism; 41. Motor seat; 42. Driving motor; 43. Main transmission wheel; 44. Eccentric wheel; 45. Synchronous belt; 5. Adjustable jaw plate assembly; 51. Arc-shaped base; 52. Fixed jaw plate; 53. Arc-shaped splash shield; 54. Guide rail; 55. Trapezoidal limit block; 56. Hydraulic push rod; 6. A first inclined guide plate; 7. Magnetic separation assembly; 71. Mounting shell; 72. Cavity; 73. Permanent magnetic roller; 74. Spectrum detector; 75. Metal separation surface; 76. Detection surface; 77. High-pressure gas nozzle; 8. Material separator; 81. Linear guide rail; 82. Electric push rod; 9. air flow sorting assembly; 91. flow guide base; 92. air flow chamber; 93. blower; 94. air permeable plate; 10. Install the bracket; 11. Coaxial reverse cutting assembly; 1101, dual-axis driving device; 11011, sealed housing; 11012, upper gear plate; 11013, lower gear plate; 11014, first transmission gear; 11015, second transmission gear; 11016, solid driving shaft; 11017, hollow driving shaft; 1102, high-speed cutting disc; 1103, screen drum; 12. Metal outlet; 13. Plastic outlet. DETAILED DESCRIPTION

[0023] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", "provided on" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1-Figure 8 , a plastic gear waste recycling device, comprising a processing box 1, inside which the following components are arranged in sequence: 1. Crushing module: Guide plate 2: installed obliquely on the left side of the top of the processing box 1 to guide the plastic gear into the crushing chamber; Eccentric crushing roller 3: arranged transversely in the crushing chamber, driven by the eccentric transmission mechanism 4 to rotate eccentrically, and cooperate with the fixed jaw plate 52 to squeeze the crushing gear; The adjustable jaw plate assembly 5 includes a fixed jaw plate 52, an arc-shaped splash shield 53 and a hydraulic adjustment assembly. The inclination angle of the fixed jaw plate 52 is adjusted through a trapezoidal limit block 55 and a hydraulic push rod 56 to control the crushing spacing.

[0028] 2. Sorting module: Magnetic separation assembly 7: includes a permanent magnetic roller 73, a spectrum detector 74 and a high-pressure air nozzle 77, which uses a magnetic field to absorb metal parts and blows them into the metal guide channel through air flow; The surface of the permanent magnet roller 73 generates a high-frequency alternating magnetic field. When the crushed mixture containing metal passes through, eddy currents are induced inside the metal. The reverse magnetic field generated by the eddy currents interacts with the magnetic field of the permanent magnet roller 73 to form a repulsive force, causing the metal parts to deviate to the metal separation surface 75 area. The metal separation surface 75 is a concentrated area where the magnetic field of the permanent magnetic roller 73 repels metal parts, and is located on the left side of the sorting channel; The detection surface 76 is the light beam coverage area of ​​the spectrum detector 74 and is located upstream of the metal separation surface 75; Separator plate 8: It can be adjusted by sliding horizontally, and the width of the metal / plastic flow guide can be adjusted in real time according to the spectrum detection results; The airflow sorting component 9 comprises an inclined guide base 91 and a blower 93, which sprays airflow upward through a wavy air permeable plate 94, and performs secondary sorting based on the difference in specific gravity.

[0029] 3. Cutting module: Coaxial reverse cutting assembly 11: The high-speed cutting disc 1102 and the screen drum 1103 are driven by a dual-axis driving device 1101 to rotate in opposite directions to achieve shearing, crushing and particle size classification. The surface of the screen drum 1103 is integrated with a blade structure for synchronous cutting.

[0030] in; The eccentric distance of the eccentric transmission mechanism 4 is 5-15 mm, ensuring the extrusion and crushing efficiency; The high-pressure air nozzle 77 of the magnetic separation assembly 7 sprays at an elevation angle of 20-40°, and the spectrum detector 74 is linked to adjust the airflow intensity; The dual-axis drive device 1101 adopts a differential gear design, so that the cutting disc and the screen drum 1103 rotate in opposite directions with a speed difference of 1-3%; Before starting the dual-axis drive device 1101, the heating temperature is set to 120°C through the control module, and the electric heating element preheats the auxiliary cutting blades of the high-speed cutting disc 1102 and the screen drum 1103; During the cutting process, the temperature sensor feeds back data to the control module in real time. When it detects that the temperature is lower than the set threshold, the heating power is automatically increased to ensure that the plastic fragments are evenly crushed under the action of thermal shear.

[0031] Embodiment 1: like Figure 1-8 As shown, the device workflow is as follows: 1. Crushing stage: The plastic gear falls between the fixed jaw plate 52 and the eccentric crushing roller 3 through the guide plate 2. The hydraulic push rod 56 pushes the trapezoidal limit block 55 to adjust the inclination angle of the fixed jaw plate 52 to 30°, and the crushing spacing is set to 8mm. The driving motor 42 drives the eccentric crushing roller 3 to rotate eccentrically at a speed of 120 rpm through the synchronous belt 45, and the metal insert is initially separated from the plastic matrix.

[0032] 2. Sorting stage: The crushed mixture enters the sorting channel through the first inclined guide plate 6. Since the function of the permanent magnetic roller 73 is to generate a high-frequency alternating strong magnetic field on the surface, when the metal falls to one side of the permanent magnetic roller 73, the conductive non-ferrous metal will induce eddy currents inside the metal after passing through the magnetic field. The magnetic field generated by these eddy currents is opposite to the original magnetic field, thereby generating a repulsive force, causing the metal to deviate to one side and be located on one side of the partition plate 8, so as to achieve separation when the plastic parts are discharged synchronously, while the plastic parts fall directly below. The spectrometer 74 identifies the residual metal amount and triggers the high-pressure air nozzle 77 to blow small metal parts such as aluminum powder into the metal guide channel with an airflow of 25m / s. The spectrometer 74 monitors the metal content in real time. When the detection value exceeds a threshold value (e.g., 5%), the control valve increases the air flow intensity of the high-pressure air nozzle 77 from 20 m / s to 30 m / s to ensure complete separation of the metal particles. The detection beam of the spectrum detector 74 covers the detection surface 76, monitors the metal residue and the proportion of metal impurities in the plastic flow guide in real time, and dynamically adjusts the air flow intensity of the high-pressure air nozzle 77 and the position of the material separator 8 according to the detection results; The material separator 8 is moved rightward by 5 cm according to the detection result, and the plastic parts fall into the cutting module after secondary sorting by the 20 m / s rising airflow on the 15° inclined guide surface of the airflow sorting component 9.

[0033] 3. Cutting stage: The dual-axis drive device 1101 drives the high-speed cutting disc 1102 to rotate counterclockwise at 3000 rpm, and the screen drum 1103 to rotate clockwise at 2970 rpm. The plastic fragments are formed into 3-5 mm uniform particles under reverse shearing and cutting by the screen blades and discharged through the plastic discharge port 13.

[0034] Embodiment 2: For gears with high metal content, the inclination angle of the guide base 91 is adjusted to 20°, the wind speed of the blower 93 is increased to 25m / s, and the displacement of the partition plate 8 is accurately controlled by a scale to ensure the sorting accuracy.

[0035] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A plastic gear waste recycling device, comprising a processing box (1), characterized in that: A downwardly inclined material guide plate (2) is pivotally mounted on the left side of the top of the processing box (1), and the end of the material guide plate (2) extends to the entrance of the crushing chamber inside the processing box (1); An eccentric crushing roller (3) is arranged transversely in the crushing chamber, and the rotating shafts at both ends of the eccentric crushing roller (3) penetrate the side wall of the processing box (1) and are driven to rotate by an eccentric transmission mechanism (4), and are configured to perform extrusion crushing on the plastic gear through eccentric movement; An adjustable jaw plate assembly (5) is provided on the top right side of the processing box (1), comprising: An arc-shaped base (51) is pivotally connected to the inner wall of the processing box (1), and a fixed jaw plate (52) opposite to the eccentric crushing roller (3) is fixedly connected to the inner surface of the arc-shaped base (51); An arc-shaped splash shield (53) is arranged above the fixed jaw plate (52), wherein a gradually contracting feeding channel is formed between the splash shield (53) and the fixed jaw plate (52); A hydraulic adjustment assembly arranged on a side wall of the processing box (1); A sorting channel is provided below the crushing chamber, comprising a first inclined guide plate (6) fixedly mounted on the inner wall of the processing box (1); A magnetic separation component (7) disposed opposite to the first inclined guide plate (6); A material separator (8) that can slide transversely and divides the sorting channel into a metal flow guide channel connected to the metal discharge port (12) and a plastic flow guide channel connected to the plastic discharge port (13); An airflow sorting component (9) is provided at the bottom of the processing box (1); A coaxial reverse cutting assembly (11) is provided below the outlet of the airflow sorting assembly (9), comprising: A mounting bracket (10) fixed to the inner wall of the processing box (1); A dual-shaft drive device (1101) mounted on a mounting bracket (10), the dual-shaft drive device having a hollow drive shaft (11017) and a solid drive shaft (11016) that rotate in opposite directions; The high-speed cutting disc (1102) and the screen drum (1103) are respectively connected to the hollow drive shaft (11017) and the solid drive shaft (11016), and are configured to perform reverse shearing and crushing on the plastic fragments and discharge them in a graded manner through the screen drum (1103).

2. The plastic gear waste recycling equipment according to claim 1, characterized in that: The eccentric transmission mechanism (4) comprises a motor base (41) fixedly connected to the side wall of the processing box (1), a driving motor (42) mounted on the motor base (41), a main transmission wheel (43) fixed to the output shaft of the driving motor (42), and an eccentric wheel (44) connected to the main transmission wheel (43) and the rotating shaft of the eccentric crushing roller (3) via a synchronous belt (45), wherein the eccentric distance of the eccentric wheel (44) is 5-15 mm.

3. The plastic gear waste recycling equipment according to claim 1, characterized in that: The hydraulic adjustment assembly comprises a trapezoidal stop block (55) in sliding contact with the back side of the base (51) and a hydraulic push rod (56) for driving the stop block to rise and fall, and is configured to adjust the crushing distance between the fixed jaw plate (52) and the eccentric crushing roller (3) by changing the position of the trapezoidal stop block (55); The hydraulic adjustment assembly further comprises a guide rail (54) arranged on a side wall of the processing box (1); the trapezoidal limit block (55) is slidably engaged with the guide rail (54) via a slider; and a bearing is provided at the end of the piston rod of the hydraulic push rod (56) for rolling contact with the inclined surface of the trapezoidal limit block (55).

4. The plastic gear waste recycling equipment according to claim 1, characterized in that: The magnetic separation assembly (7) comprises a mounting housing (71) provided with an internal cavity (72), wherein a permanent magnetic roller (73) is arranged in the cavity (72); A spectrum detector (74) disposed below the permanent magnetic roller (73), and a metal separation surface (75) and a detection surface (76) disposed along the sorting channel; The magnetic separation component (7) further comprises a plurality of high-pressure air nozzles (77) arranged in an array and distributed on the side wall of the mounting shell (71); the spray direction of the high-pressure air nozzles (77) is directed toward the metal flow guide channel and is at an elevation angle of 20-40° to the horizontal plane; the high-pressure air nozzles (77) of the magnetic separation component (7) are connected to a built-in air pump via a pipeline; and the spectrum detector (74) is electrically connected to a control valve of the high-pressure air nozzles (77) to adjust the airflow intensity according to the detection result.

5. The plastic gear waste recycling equipment according to claim 1, characterized in that: The material separator (8) is slidably connected to the processing box (1) via a linear slide rail (81) on the side wall, and is connected to an electric push rod (82) to drive it to move laterally. The outer wall of the processing box (1) is provided with a scale to display the displacement of the material separator (8).

6. The plastic gear waste recycling equipment according to claim 1, characterized in that: The airflow sorting component (9) comprises an inclined flow guide base (91), the surface of which is provided with an air permeable plate (94); An airflow chamber (92) disposed inside the flow guide base (91) and a blower (93) in communication with the airflow chamber are configured to spray airflow upward through the air permeable plate (94) to achieve secondary separation of metal and plastic; The inclination angle of the flow guide base (91) is adjustable in a range of 10-25 degrees, the air outlet speed of the blower (93) is controlled in conjunction with the inclination angle of the flow guide base (91), and the surface of the air permeable plate (94) is provided with a wavy flow guide pattern with a height of 2-5 mm.

7. The plastic gear waste recycling equipment according to claim 1, characterized in that: The dual-axis driving device (1101) comprises: A first transmission gear (11014) and a second transmission gear (11015) meshing with each other are provided in the sealed housing (11011); the number of teeth of the second transmission gear (11015) is 1 to 3 fewer than that of the first transmission gear (11014); An upper toothed disc (11012) connected to a first transmission gear (11014) and a lower toothed disc (11013) connected to a second transmission gear (11015); The hollow drive shaft (11017) is fixedly connected to the lower gear disc (11013) and drives the screen drum (1103) to rotate at a first speed; The solid drive shaft (11016) is fixedly connected to the upper gear disc (11012) and drives the high-speed cutting blade disc (1102) to rotate at a second rotational speed opposite to the first rotational speed.

8. The waste plastic gear recycling equipment according to claim 3, characterized in that: The surface of the guide rail (54) is provided with a wear-resistant coating, and the inclined surface angle of the trapezoidal limit block (55) is 30-45°.

9. The plastic gear waste recycling equipment according to claim 7, characterized in that: The surface of the screen drum (1103) is evenly distributed with screen holes having an aperture of 3-5 mm, and an auxiliary cutting blade arranged in an alternating manner with the high-speed cutting disc (1102) is fixed on its outer wall; Electric heating elements are embedded in the auxiliary cutting blades of the high-speed cutting disc (1102) and the screen drum (1103), and the electric heating elements are connected to an external power source via conductive slip rings inside the hollow drive shaft (11017) and the solid drive shaft (11016); The inner wall of the processing box (1) is also provided with a temperature sensor, which is electrically connected to the control module of the electric heating element and is used to monitor the temperature of the cutting area in real time and adjust the heating power.

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