An engineering plastic recycling system

Abstract

This invention discloses an engineering plastics recycling system, belonging to the field of plastic recycling technology. The system includes a recycling and crushing mechanism and a thermoforming mechanism that reciprocates and slides with the recycling and crushing mechanism. The thermoforming mechanism includes a thermoforming component, a striking component, and a rack and pinion drive component. The thermoforming component includes a thermoforming box and a U-shaped base. The striking component includes a sliding rod, a sliding plate, and a lever, with the lever slidingly engaging an anti-clogging component. When the thermoforming mechanism reciprocates, the top of the sliding rod is forced downwards, causing the anti-clogging component to swing via the lever. This causes the high-temperature resistant rubber ball to intermittently strike the bottom of the metal filter frame of the recycling and crushing mechanism, automatically shaking off clogged fragments and spreading the material evenly. This invention uses pure mechanical linkage to achieve anti-clogging, eliminating the need for sensors; the same power source can drive the stirring and crushing components, improving the uniformity of thermoforming; it has a compact structure, reliable operation, and is suitable for continuous recycling processes of engineering plastics.

Description

Technical Field

[0001] This invention relates to the field of plastic recycling technology, and more specifically, to an engineering plastic recycling system. Background Technology

[0002] Engineering plastics (such as polycarbonate, nylon, and polyoxymethylene) are widely used in the automotive, electronics, and machinery industries due to their excellent mechanical properties, heat resistance, and dimensional stability. With the increasing use of plastic products, the recycling of waste engineering plastics not only helps conserve resources but also plays a vital role in environmental protection. Currently, common engineering plastic recycling processes typically include crushing, washing, drying, and melt granulation. Among these, screening and hot melting after crushing are key steps affecting recycling efficiency and product quality.

[0003] Existing engineering plastic recycling equipment, such as the integrated plastic crushing and melting machine disclosed in Chinese patent CN211104989U, includes a crushing device and a hot-melting device. The crushed material is filtered through a screen and then enters the hot-melting chamber. However, this type of equipment still has the following shortcomings in practical use: The plastic fragments produced by these engineering plastic recycling equipment are irregular in shape and have sharp edges, making them very easy to get stuck in the mesh of the metal filter screen, resulting in a decrease in screening efficiency. At the same time, the system often uses an independent vibrating motor to assist in material discharge. The vibrating motor is not only prone to failure due to dust intrusion or coil overheating, but its high-frequency micro-amplitude vibration is also difficult to effectively destroy the sharp and irregular fragments stuck in the mesh. More importantly, it is easy to cause local material accumulation or no-load operation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an engineering plastic recycling system that utilizes the reciprocating sliding cooperation between a recycling crushing mechanism and a thermal melting mechanism, along with a double-spring reset-type striking component and a lever-type anti-clogging component, to intermittently strike the bottom of a metal filter frame with a high-temperature resistant rubber ball. This purely mechanical structure requires no additional sensors or complex controls to automatically dislodge plastic fragments clogging the mesh, while simultaneously leveling the accumulated material, ensuring unobstructed screening channels, and improving screening efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An engineering plastic recycling system includes a recycling and crushing mechanism, on which a heat-melting mechanism is reciprocatingly slidably coupled. The heat-melting mechanism includes a heat-melting component reciprocatingly slidably coupled to the recycling and crushing mechanism, two striking components disposed opposite each other inside the heat-melting component, and a rack and pinion drive component slidably coupled to the outside of the heat-melting component. The heat-melting component includes a heat-melting box body, with U-shaped bases fixed to both inner side walls of the heat-melting box body. A guide hole is provided through the bottom of the inner side of each U-shaped base, and a first vertical rod is fixed to the bottom of the outer side of each U-shaped base. Pins are fixed below both U-shaped bases; the striking component includes a slide rod that slides inside the guide hole, the top of the slide rod is dome-shaped, a bottom ring is fixed to the circumference of the slide rod, a first spring is fixed to the top of the bottom ring and is fixedly connected to the outer bottom of the U-shaped base, a sliding plate is fixed to the bottom of the slide rod, a second spring is fixed between the top of the sliding plate and the outer bottom of the U-shaped base and sleeved on the outer circumference of the first vertical rod, a lever is fixed to one side of the sliding plate, and an anti-blocking component that slides and rotates on the pin and reciprocates with the recycling and crushing mechanism is slidably engaged on the circumference of the lever.

[0006] The present invention is further configured such that: the anti-blocking component includes a striking plate rotatably fitted on the circumferential side of the pin shaft, a sliding groove is provided through one side of the striking plate to slide with the lever, a transverse rod is fixed on one side of the striking plate, and a plurality of high-temperature resistant rubber balls that reciprocate in contact with the recycling and crushing mechanism are fixed on the top circumferential side of the transverse rod.

[0007] The invention is further configured such that: two symmetrical L-shaped plates are fixed to the top of the hot melt box, and a plurality of first rollers are fixed to one outer side of the two L-shaped plates; the recycling and crushing mechanism includes a crushing box, and U-shaped guide seats that roll with the first rollers are fixed to the two outer sides of the crushing box, and a plurality of second rollers that roll with the two U-shaped bases are fixed to the two outer sides of the crushing box below the two U-shaped guide seats.

[0008] The invention is further configured such that: a metal filter frame extending into the interior of the crushing chamber is slidably locked to one outer side of the crushing chamber; the lower end of the crushing chamber has an open structure, with the metal filter frame laterally inserted, locked, and exposed at the bottom of the open end; an anti-blocking component is hinged to the inner wall of the hot-melt chamber via a pin, and its horizontal rod and high-temperature resistant rubber ball extend from bottom to top directly below the bottom of the crushing chamber; when the striking plate swings upward, the high-temperature resistant rubber ball intermittently strikes the bottom of the metal filter frame through the open space at the bottom of the crushing chamber without obstruction; and a limiting circular plate is threaded to the bottom of both first vertical rods.

[0009] The invention is further configured such that: a mounting side plate is fixed to one outer side of the hot melt box near the top; a first motor is fixed to one side of the mounting side plate; a reciprocating lead screw is fixed to the output shaft of the first motor; and a limit nut is fixed to the end of the reciprocating lead screw; a top plate is fixed to one outer side of the hot melt box below the mounting side plate; two symmetrically arranged guide vertical rods are fixed to the bottom of the top plate; and an L-shaped moving plate is fixed to one outer side of the crushing box, which reciprocates and slides with the reciprocating lead screw; a reversing slider is rotatably mounted on the L-shaped moving plate; and the reversing slider slides into the cross spiral groove on the circumferential side of the reciprocating lead screw.

[0010] The invention is further configured such that: the bottom of both guide vertical rods is threadedly connected to a limit plate; the bottom of the hot melt box is set with an incline, and a PTC hot melt heating plate is embedded in the bottom and side wall of the hot melt box, and a thermocouple temperature sensor is installed on the side wall of the inner cavity of the hot melt box; a rotating shaft is rotatably sealed above the two inclines inside the hot melt box, and two sets of agitators are fixedly arranged symmetrically on the circumferential side of the rotating shaft inside the hot melt box, and a crushing cone is fixed at the end of each set of agitators.

[0011] The invention is further configured such that: the rack drive component includes a reciprocating plate that slides through and is slidably fitted on two guide vertical rods; two reciprocating springs that are respectively sleeved and fitted on the two guide vertical rods are fixed between the reciprocating plate and the top plate; a U-shaped sliding plate is fixed on one side of the reciprocating plate; and a gear rack is fixed on the inner wall of the U-shaped sliding plate; and a rotating gear that meshes with the gear rack is fixed at the end of the rotating shaft outside the hot melt box.

[0012] The invention is further configured such that: an extension rod is fixed to the top of the U-shaped sliding plate, and a sliding ball is fixed to the top of the extension rod; a wave-shaped transverse plate that slides with the sliding ball is fixed to the bottom of the L-shaped movable plate.

[0013] The invention is further configured such that: two symmetrical crushing rollers are rotatably fitted inside the crushing box; a drive motor is fixedly connected to one end of one of the crushing rollers on one outer side of the crushing box; a first gear is fixedly attached to the end of one crushing roller outside the crushing box; and a second gear meshing with the first gear is fixedly attached to the end of the other crushing roller outside the crushing box; a discharge pipe is fixedly attached to the bottom of the hot melt box; and a control valve is provided on the circumferential side of the discharge pipe.

[0014] The advantages of this invention are: 1. This invention uses the reciprocating sliding cooperation between the recycling crushing mechanism and the hot melting mechanism, along with the linkage of the double spring reset type striking component and the lever type anti-blocking component, to make the high-temperature resistant rubber ball intermittently strike the bottom of the metal filter screen frame. This purely mechanical structure does not require additional sensors or complex control, and can automatically shake off the plastic fragments that block the mesh, while also spreading the accumulated material, keeping the screening channel unobstructed and improving screening efficiency.

[0015] 2. This invention utilizes the same reciprocating sliding power source, which drives the rack and pinion drive to move up and down through the wave-shaped transverse plate and the sliding ball, thereby driving the rotating gear and the rotating shaft to rotate alternately in both directions. The stirring rod and the crushing cone repeatedly stir, mix and crush the molten or semi-molten material in the hot melt box, promoting uniform heat conduction, accelerating melting, breaking up agglomerates, and avoiding local overheating or coking, thereby improving the hot melt efficiency and melt uniformity.

[0016] 3. This invention integrates functions such as crushing, screening, anti-blocking, hot melting, and stirring into one unit. The reciprocating sliding of the hot melting mechanism simultaneously serves two key actions: knocking to prevent blockage and internal stirring. This reduces the need for additional driving components, resulting in a compact structure, low energy consumption, and suitability for the continuous recycling of engineering plastics. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an engineering plastic recycling system according to the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the recycling and crushing mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of the recycling and crushing mechanism of the present invention from an upward perspective.

[0020] Figure 4 This is a top view of the recycling and crushing mechanism of the present invention.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the thermal melting mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the hot melt component of the present invention.

[0023] Figure 7 This is a top-view cross-sectional structural diagram of the hot melt component of the present invention.

[0024] Figure 8 This is a schematic diagram of the structure of the striking component of the present invention.

[0025] Figure 9 This is a schematic diagram of the rack drive component of the present invention.

[0026] In the diagram: 1. Recycling and crushing mechanism; 2. Hot melting mechanism; 3. Hot melting component; 4. Impact component; 5. Rack and pinion drive component; 6. Anti-clogging component; 101. Crushing box; 102. U-shaped guide seat; 103. Second roller; 104. Metal filter frame; 105. L-shaped moving plate; 106. Wave-shaped transverse plate; 107. Crushing roller; 108. Drive motor; 109. First gear; 110. Second gear; 301. Hot melting box; 302. U-shaped base; 303. Guide hole; 304. First vertical rod; 305. Pin; 306. L-shaped plate; 307. First roller; 308. Mounting side plate; 309. 1. Motor; 310. Reciprocating lead screw; 311. Top plate; 312. Guide vertical rod; 313. Rotating shaft; 314. Stirring rod; 315. Crushing cone; 316. Rotating gear; 317. Discharge pipe; 318. Control valve; 401. Slide rod; 402. Bottom ring; 403. First spring; 404. Sliding plate; 405. Pulley; 406. Second spring; 501. Reciprocating plate; 502. Reciprocating spring; 503. U-shaped sliding plate; 504. Gear rack; 505. Extension rod; 506. Sliding ball; 601. Striking plate; 602. Sliding groove; 603. Horizontal rod; 604. High-temperature resistant rubber ball. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0030] Example 1, please refer to Figures 1-9The present invention provides the following technical solution: an engineering plastic recycling system, specifically, including a recycling and crushing mechanism 1, a reciprocating slidingly fitted hot-melting mechanism 2 on the recycling and crushing mechanism 1, the hot-melting mechanism 2 including a hot-melting component 3 reciprocatingly slidingly fitted on the recycling and crushing mechanism 1, two striking components 4 oppositely arranged inside the hot-melting component 3, and a rack and pinion drive component 5 slidingly fitted outside the hot-melting component 3; the hot-melting component 3 includes a hot-melting box 301, and U-shaped bases 302 are fixed to the two inner side walls of the hot-melting box 301, a guide hole 303 is opened through the bottom of the U-shaped base 302, and a first vertical rod 304 is fixed to the bottom of the outer side of the U-shaped base 302, the hot-melting box 301 being fixed below the two U-shaped bases 302. A pin 305 is fixed; the striking component 4 includes a slide rod 401 that is slidably fitted inside the guide hole 303. The top of the slide rod 401 is dome-shaped. A bottom ring 402 is fixed to the side of the slide rod 401. A first spring 403 that is fixedly connected to the outer bottom of the U-shaped base 302 is fixed to the top of the bottom ring 402. A sliding plate 404 that is slidably fitted through the first vertical rod 304 is fixed to the bottom of the slide rod 401. A lever 405 is fixed to one side of the sliding plate 404. A second spring 406 that is sleeved on the outer periphery of the first vertical rod 304 is fixed between the top of the sliding plate 404 and the outer bottom of the U-shaped base 302. An anti-blocking component 6 that is rotatably fitted on the pin 305 and reciprocally striking the recycling and crushing mechanism 1 is slidably fitted to the side of the lever 405. Furthermore, the anti-blocking component 6 includes a striking plate 601 rotatably fitted on the circumferential side of the pin 305. A sliding groove 602, which slides through one side of the striking plate 601 and slides with the lever 405, is provided. A transverse rod 603 is fixed to one side of the striking plate 601. Several high-temperature resistant rubber balls 604, which reciprocate and contact the recycling and crushing mechanism 1, are fixed to the top of the transverse rod 603. Two symmetrical L-shaped plates 306 are fixed to the top of the hot-melt box 301. Several first rollers 307 are fixed to one outer side of each of the two L-shaped plates 306. The recycling and crushing mechanism 1 includes a crushing box 101. U-shaped guide seats 10, which roll with the first rollers 307, are fixed to both opposite outer sides of the crushing box 101. 2. Several second rollers 103, which roll and cooperate with the two U-shaped bases 302, are fixed on the two opposite outer sides of the crushing box 101 below the two U-shaped guide seats 102; a metal filter frame 104 extending into the interior of the crushing box 101 is slidably locked through one outer side of the crushing box 101; the lower end of the crushing box 101 has an open structure, and the metal filter frame 104 is horizontally inserted and locked and exposed at the bottom of the open end; the anti-blocking component 6 is hinged to the inner wall of the hot melt box 301 by a pin 305, and its horizontal rod 603 and high-temperature resistant rubber ball 604 extend from bottom to top to the bottom of the crushing box 101; the bottom of the two first vertical rods 304 are threaded with limit plates.

[0031] The working principle of this embodiment is as follows: When the system is running, the hot melting mechanism 2 slides horizontally back and forth along the recycling crushing mechanism 1 through two sets of roller mechanisms under the push and pull of the reciprocating drive component. During the reciprocating movement, the first roller 307 on the outer side of the two L-shaped plates 306 symmetrically fixed at the top of the hot melting box 301 engages with the U-shaped guide seat 102 on the outer side of the crushing box 101 to achieve upper guidance and load bearing. At the same time, the second roller 103 below the U-shaped guide seat 102 on the outer side of the crushing box 101 rolls and fits against the bottom of the U-shaped base 302 inside the hot melting box 301 to achieve lower support and rolling resistance reduction. In this way, the two sets of roller structures together ensure that the hot melting mechanism 2 can slide smoothly and without jamming along the length of the crushing box 101. Before the hot melting mechanism 2 and the recycling and crushing mechanism 1 begin to slide back and forth in the horizontal direction, the striking element 4 is in a stationary state. Its first spring 403 (located between the bottom ring 402 and the outer bottom of the U-shaped base 302) and second spring 406 (located between the sliding plate 404 and the outer bottom of the U-shaped base 302) are both at their natural extension length. At this time, the sliding rod 401 moves up to the highest initial position along the guide hole 303 of the U-shaped base 302, and its top dome protrudes from the upper surface of the U-shaped base 302. The lever 405 on the side of the sliding plate 404 is in a high position and drives the striking plate 601 to tilt downward around the pin 305 through the sliding groove 602, so that all the high-temperature resistant rubber balls 604 on the horizontal rod 603 are separated from the bottom of the metal filter frame 104, that is, in a non-contact state. A reciprocating drive assembly (such as a two-way cylinder or a linear slide module driven by a motor) is fixedly installed on the outer wall of the recycling crushing mechanism 1. By activating this reciprocating drive assembly, a pushing and pulling force is directly provided to the thermal melting mechanism 2, causing it to slide smoothly horizontally along the length of the recycling crushing mechanism 1. When the thermal melting mechanism 2 slides horizontally, the second roller 103 fixed on the outside of the crushing box 101 rolls relative to the bottom surface of the U-shaped base 302 inside the thermal melting box 301. As the thermal melting mechanism 2 moves horizontally, the second roller 103 intermittently rolls and crushes the dome at the top of the slide rod 401 protruding upward from the guide hole 303, thereby allowing the thermal melting mechanism 2 to move smoothly. The weight of the second roller 103 and the positioning pressure force the dome at the top of the slide rod 401 to move downwards, thereby gradually stretching the first spring 403 fixedly connected to the bottom ring 402. While the first spring 403 is gradually stretched, the sliding plate 404 at the bottom of the slide rod 401 slides downwards along the first vertical rod 304, simultaneously stretching the second spring 406. The limiting circular plate at the bottom of the first vertical rod 304 limits the maximum downward stroke of the sliding plate 404, preventing it from disengaging. When the sliding plate 404 moves downwards, the lever 405 on its side moves downwards simultaneously, causing the lever 405 to slide relative to the sliding groove 602 of the striking plate 601, forcing the striking plate 601 to rotate around the pin 305. The upward swing causes the striking plate 601 to lift all the high-temperature resistant rubber balls 604 upward via the horizontal rod 603, striking the bottom of the metal filter frame 104 with a certain force. This striking action dislodges the engineering plastic fragments blocking the mesh of the metal filter frame 104, and simultaneously spreads the engineering plastic fragments accumulated in a certain area on the top of the metal filter frame 104, thereby keeping the screening channel unobstructed and improving the screening effect. Later, when the thermomelting mechanism 2 continues to slide, causing the second roller 103 to continue rolling in the U-shaped base 302 and gradually separate after passing the dome of the slide rod 401, the first spring 403 and the second spring 406 lose the downward pressure of the second roller 103. Simultaneously, the elastic force is released, causing the first spring 403 to push the bottom ring 402 upward, and the second spring 406 to push the sliding plate 404 upward, together causing the slide rod 401 to quickly rise back to the initial high position, driving the lever 405 to move upward, causing the striking plate 601 to swing in the opposite direction, and the high-temperature resistant rubber ball 604 to detach from the bottom of the metal filter frame 104 and return to the separated position. As the thermomelting mechanism 2 slides back and forth, the above-mentioned pressing, striking, and resetting process is repeated periodically, so that when the striking plate 601 swings up and down, the high-temperature resistant rubber ball 604 passes through the open space at the bottom of the crushing box 101 and makes intermittent striking contact with the bottom of the metal filter frame 104 without obstruction, realizing a fully automatic anti-blocking and flattening process.

[0032] Example 2, please refer to Figures 1-9This second embodiment is an improvement on the first embodiment as follows: Specifically, a mounting side plate 308 is fixed to one outer side of the hot melt box 301 near the top; a first motor 309 is fixed to one side of the mounting side plate 308; a reciprocating lead screw 310 is fixed to the output shaft of the first motor 309; a limit nut is fixed to the end of the reciprocating lead screw 310; a top plate 311 is fixed to one outer side of the hot melt box 301 below the mounting side plate 308; two symmetrically arranged guide vertical rods 312 are fixed to the bottom of the top plate 311; an L-shaped moving plate 105 is fixed to one outer side of the crushing box 101, which reciprocates and slides with the reciprocating lead screw 310. The 05 is equipped with a reversing slider, which slides into the cross helical groove on the side of the reciprocating screw 310. The bottom of both guide rods 312 is threadedly connected to limit plates. The bottom of the hot melt box 301 is sloped, and PTC hot melt heating plates are embedded in the bottom and side walls of the hot melt box 301. A thermocouple temperature sensor is installed on the side wall of the inner cavity of the hot melt box 301. A rotating shaft 313 is rotatably sealed above the two slopes inside the hot melt box 301. Two sets of symmetrically arranged stirring rods 314 are fixed on the side of the rotating shaft 313 inside the hot melt box 301, and each set of stirring rods 314 has a crushing cone fixed to its end. Body 315; rack and pinion drive 5 includes a reciprocating plate 501 that slides through and is slidably fitted onto two guide vertical rods 312. Two reciprocating springs 502, respectively sleeved and fitted onto the two guide vertical rods 312, are fixed between the reciprocating plate 501 and the top plate 311. A U-shaped sliding plate 503 is fixed to one side of the reciprocating plate 501, and a gear rack 504 is fixed to the inner wall of the U-shaped sliding plate 503. A rotating gear 316, meshing with the gear rack 504, is fixed to the end of the rotating shaft 313 outside the hot melt box 301. An extension rod 505 is fixed to the top of the U-shaped sliding plate 503, and a sliding ball 506 is fixed to the top of the extension rod 505. The bottom of the L-shaped moving plate 105 is fixed... A wave-shaped transverse plate 106 is fixedly provided to slide in cooperation with the sliding ball 506; two symmetrical crushing rollers 107 are rotatably fitted inside the crushing box 101; a drive motor 108 is fixedly connected to one end of one of the crushing rollers 107 on one outer side of the crushing box 101; a first gear 109 is fixedly located at the end of one crushing roller 107 outside the crushing box 101; a second gear 110 is fixedly located at the end of the other crushing roller 107 outside the crushing box 101 and meshes with the first gear 109; a discharge pipe 317 is fixedly provided at the bottom of the hot melt box 301; a control valve 318 is provided on the circumferential side of the discharge pipe 317.

[0033] The working principle of this embodiment two: This embodiment two adds auxiliary functions of driving, stirring, mixing and crushing, and hot melting processes based on the first embodiment. Building upon the reciprocating sliding cooperation between the recycling crushing mechanism 1 and the hot melting mechanism 2, and the automatic unblocking and leveling achieved by the striking component 4 driving the anti-blocking component 6, as described in the first embodiment one, it further integrates the stirring and crushing function inside the hot melting box 301 driven by components such as the first motor 309, the reciprocating screw 310, the rack and pinion drive component 5, and the wave-shaped transverse plate 106, as well as the active driving function of the overall reciprocating sliding. The specific working principle is as follows: The first motor 309 is started, and its output shaft drives the reciprocating screw 310 to rotate unidirectionally. Since the L-shaped moving plate 105 fixed to the outside of the crushing box 101 is equipped with a freely rotatable reversing slider, this reversing slider is limited to the direction of rotation. The reciprocating screw 310 is guided to slide within the bidirectional cross spiral groove. Therefore, when the reciprocating screw 310 rotates continuously in one direction, the automatic reverse switching of the reversing slider at the end of the spiral groove acts on the hot melt box 301 on which the first motor 309 is installed, thereby driving the hot melt box 301 to slide smoothly horizontally relative to the crushing box 101. During the horizontal reciprocating sliding, the hot melt box 301 achieves smooth and low-resistance sliding through the rolling cooperation of the first roller 307 and the U-shaped guide seat 102, and the rolling cooperation of the second roller 103 and the U-shaped base 302. This reciprocating sliding not only provides the motion power for the striking part 4 in Embodiment 1 (the top of the slide bar 401 intermittently contacts and squeezes the second roller 103 and other structures), but also provides the drive for the action of the rack drive 5 added in Embodiment 2. When the hot melt box 301 slides back and forth relative to the crushing box 101, the wave-shaped transverse plate 106 fixed to the bottom of the L-shaped moving plate 105 remains stationary with the crushing box 101, while the sliding ball 506 fixed to the top of the U-shaped sliding plate 503 moves together with the hot melt box 301. The sliding ball 506 rolls along the wave-shaped convex trajectory on the lower surface of the wave-shaped transverse plate 106. To reduce friction, the surface of the sliding ball 506 is coated with a wear-resistant self-lubricating coating (such as polytetrafluoroethylene or molybdenum disulfide). When the sliding ball 506 crosses the crest, it forces the rack assembly 5 to overcome the damping of the reciprocating spring 502 and make a vertical downward movement. Its vertical reciprocating stroke is set to 50mm to 80mm, so that the gear rack 504 on the inner wall of the U-shaped sliding plate 503 continuously meshes with the rotating gear 316, converting the vertical linear motion into the rotation of the shaft 313 from 90° to 120°. The alternating forward and reverse rotation within the range generates sufficient torque to overcome the resistance of the high-viscosity plastic melt for crushing and mixing. While the rotating shaft 313 is rotating, two sets of symmetrically arranged stirring rods 314 are fixed on the circumference of the rotating shaft 313. Each set of stirring rods 314 has a crushing cone 315 fixed at its end. When the rotating shaft 313 rotates back and forth, the stirring rods 314 and the crushing cone 315 repeatedly stir, mix and crush the molten or semi-molten engineering plastic inside the hot melt box 301, promoting uniform heat conduction, accelerating melting, breaking up agglomerates, and improving hot melt efficiency and melt quality. After being crushed and screened, the engineering plastic scraps fall into the hot melt chamber 301. At this point, the PTC hot melt heating plate embedded in the bottom and side walls of the hot melt chamber 301, along with the thermocouple temperature sensor installed on the side wall of the inner cavity of the hot melt chamber 301, electrically connects the thermocouple temperature sensor to an external PLC controller (the external PLC controller is existing technology and is not shown in the figure, so it will not be discussed further here). This external PLC controller monitors the melt temperature inside the chamber in real time and sends a signal back to the PLC controller to adjust the output power of the PTC hot melt heating plate, thereby maintaining the temperature inside the hot melt chamber 301 between 180°C and 250°C. Between (the threshold is adjusted according to the type of engineering plastic being recycled), the plastic is effectively prevented from overheating, coking, or degrading locally, so that it gradually melts under the heating action of the PTC hot melt heating plate; at the same time, the reciprocating rotating stirring rod 314 and crushing cone 315 continuously turn the material over to prevent local overheating or coking, and assist in crushing large particles that are not completely melted; after melting is completed, the control valve 318 on the discharge pipe 317 is opened, and the melt flows out along the inclined plane to enter the next process.

[0034] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An engineering plastic recycling system comprising a recycling crushing mechanism (1), characterized in that: The recycling and crushing mechanism (1) is reciprocally slidingly fitted with a heat melting mechanism (2). The heat melting mechanism (2) includes a heat melting component (3) reciprocally slidingly fitted on the recycling and crushing mechanism (1), two striking components (4) disposed opposite to each other inside the heat melting component (3), and a rack and pinion drive component (5) slidingly fitted on the outside of the heat melting component (3). The hot melt component (3) includes a hot melt box (301), and U-shaped bases (302) are fixed to the two inner side walls of the hot melt box (301). A guide hole (303) is opened through the bottom of the U-shaped base (302), and a first vertical rod (304) is fixed to the bottom of the U-shaped base (302). Pins (305) are fixed to the two inner side walls of the hot melt box (301) below the two U-shaped bases (302). The striking component (4) includes a slide rod (401) that is slidably fitted inside the guide hole (303). The top of the slide rod (401) is dome-shaped. A bottom ring (402) is fixed to the periphery of the slide rod (401). A first spring (403) is fixed to the top of the bottom ring (402) and is fixedly connected to the outer bottom of the U-shaped base (302). A sliding plate (404) is fixed to the bottom of the slide rod (401) and is slidably fitted through the first vertical rod (304). A second spring (406) is fixed between the top of the sliding plate (404) and the outer bottom of the U-shaped base (302) and is sleeved on the outer periphery of the first vertical rod (304). A lever (405) is fixed to one side of the sliding plate (404). An anti-blocking component (6) is slidably fitted to the periphery of the lever (405) and is rotatably fitted on the pin (305) and is reciprocally fitted with the recycling and crushing mechanism (1).

2. The engineering plastics recycling system according to claim 1, characterized in that: The anti-blocking component (6) includes a striking plate (601) rotatably fitted on the circumferential side of the pin (305). A sliding groove (602) is provided through one side of the striking plate (601) and slides with the lever (405). A transverse rod (603) is fixed on one side of the striking plate (601). Several high-temperature resistant rubber balls (604) are fixed on the top circumferential side of the transverse rod (603) and reciprocally strike the recycling and crushing mechanism (1).

3. The engineering plastics recycling system according to claim 2, characterized in that: Two symmetrical L-shaped plates (306) are fixed to the top of the hot melt box (301), and several first rollers (307) are fixed to one outer side of the two L-shaped plates (306). The recycling and crushing mechanism (1) includes a crushing box (101). The crushing box (101) has U-shaped guide seats (102) fixed on both outer sides that are in rolling cooperation with the first roller (307). The crushing box (101) has several second rollers (103) fixed on both outer sides below the two U-shaped guide seats (102) that are in rolling cooperation with the two U-shaped bases (302).

4. The engineering plastics recycling system according to claim 3, characterized in that: A metal filter frame (104) extending into the interior of the crushing chamber (101) is slidably locked to one of the outer sides of the crushing chamber (101). The lower end of the crushing chamber (101) is open. The metal filter frame (104) is horizontally inserted and locked and exposed at the bottom of the open end. The anti-blocking component (6) is hinged to the inner wall of the hot melt chamber (301) by a pin (305). Its horizontal rod (603) and high-temperature resistant rubber ball (604) extend from bottom to top to the bottom of the crushing chamber (101). When the striking plate (601) swings upward, the high-temperature resistant rubber ball (604) makes intermittent striking contact with the bottom of the metal filter frame (104) through the open space at the bottom of the crushing chamber (101) without obstruction. Both of the first vertical rods (304) have a limit plate threadedly connected to their bottoms.

5. The engineering plastics recycling system according to claim 3, characterized in that: A mounting side plate (308) is fixed to one outer side of the hot melt box (301) near the top. A first motor (309) is fixed to one side of the mounting side plate (308). A reciprocating screw (310) is fixed to the output shaft of the first motor (309). A limit nut is fixed to the end of the reciprocating screw (310). The hot melt box (301) has a top plate (311) fixed on one outer side below the mounting side plate (308), and two symmetrically arranged guide vertical rods (312) are fixed at the bottom of the top plate (311). An L-shaped moving plate (105) is fixed on one outer side of the crushing box (101) and slides back and forth with the reciprocating screw (310).

6. The engineering plastics recycling system according to claim 5, characterized in that: The L-shaped moving plate (105) is rotatably equipped with a reversing slider, which slides into the cross helical groove on the circumferential side of the reciprocating screw (310); Both guide rods (312) are threaded to the bottom of a limit plate. The bottom of the hot melt box (301) is set with an incline. PTC hot melt heating plates are embedded in the bottom and side walls of the hot melt box (301). A thermocouple temperature sensor is installed on the side wall of the inner cavity of the hot melt box (301). A rotating shaft (313) is rotatably sealed above the two inclines inside the hot melt box (301). Two sets of stirring rods (314) are fixed symmetrically on the circumferential side of the rotating shaft (313) inside the hot melt box (301). A crushing cone (315) is fixed at the end of each set of stirring rods (314). The rack drive component (5) includes a reciprocating plate (501) that slides through and is slidably fitted on two guide rods (312). Two reciprocating springs (502) are fixed between the reciprocating plate (501) and the top plate (311) and are respectively sleeved and fitted on the two guide rods (312). A U-shaped slide plate (503) is fixed on one side of the reciprocating plate (501), and a gear rack (504) is fixed on the inner wall of the U-shaped slide plate (503).

7. The engineering plastics recycling system according to claim 6, characterized in that: The end of the rotating shaft (313) is fixed outside the hot melt box (301) with a rotating gear (316) that meshes with the gear rack (504).

8. The engineering plastics recycling system according to claim 7, characterized in that: An extension rod (505) is fixed to the top of the U-shaped sliding plate (503), and a sliding ball (506) is fixed to the top of the extension rod (505). The bottom of the L-shaped movable plate (105) is fixed with a wave-shaped transverse plate (106) that slides in cooperation with the sliding ball (506).

9. The engineering plastics recycling system according to claim 3, characterized in that: The crushing box (101) is rotatably fitted with two symmetrical crushing rollers (107). A drive motor (108) is fixedly connected to one end of one of the crushing rollers (107) on one outer side of the crushing box (101). A first gear (109) is fixedly attached to the end of one crushing roller (107) outside the crushing box (101), and a second gear (110) that meshes with the first gear (109) is fixedly attached to the end of the other crushing roller (107) outside the crushing box (101). The bottom of the hot melt box (301) is fixed with a discharge pipe (317), and a control valve (318) is provided on the periphery of the discharge pipe (317).

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