Unmanned aerial vehicle propeller injection molding blanking scrap recovery device

Abstract

This invention discloses a waste recycling device for injection molding of UAV propellers, relating to the field of plastic waste recycling technology. It aims to solve the technical problem of generating large amounts of dust due to dragging, friction, and excessive grinding during the recycling and crushing of irregularly shaped waste materials. The device includes a machine base with a crushing mechanism arranged on its side wall, and a transfer mechanism and a cutting mechanism arranged on its top. The transfer mechanism includes a cutting disc, and the cutting mechanism includes pressure plates and cross blades. Multiple pressure plates form a pressure surface structure at their bottoms, and a punching channel is formed between every two pressure plates. The cross blades are movably arranged within the punching channel. The pressure surface structure is used to press the injection molding waste material inside the cutting disc, and the cross blades are used to punch the pressed injection molding waste material. The crushing mechanism is located below the flipping station. This invention has the advantage of cutting the injection molding waste material into short blocks through pre-punching before further crushing, avoiding the entanglement, dragging, and stringing of long strips of waste material directly entering the roller cutter.

Description

Technical Field

[0001] This invention relates to the field of plastic waste recycling technology, and more specifically, to a device for recycling waste materials from the injection molding of drone propellers. Background Technology

[0002] With the increasing demand for lightweight and low-cost manufacturing in the drone industry, the recycling and reuse of waste materials from propeller injection molding has become a key link in cost reduction and environmental protection. In the drone propeller injection molding process, after mold opening, a robotic arm first separates the finished propeller from the waste material. The separated waste material is collected into the crushing mechanism through the discharge port, where the crushing roller cuts the plastic waste into uniformly sized particles. The particles are then discharged into a storage tank for dehumidification and drying. After drying, the particles are fed into a mixing dryer with the new material according to the set mixing ratio through a proportional valve for thorough homogenization. Finally, the homogenized mixture is transported back to the injection molding machine hopper by a suction machine for remolding, thus forming a complete closed-loop circulation system.

[0003] The drone propellers are injection molded using a multi-cavity mold. After molding, the main runner and branch runners cool and solidify, forming branched waste material. This waste material includes thin-walled gate flakes and forming flash, making it a complex, irregularly shaped waste material. In existing recycling processes, after the mold is opened, a robotic arm separates the finished product from the irregularly shaped waste material. The waste material is then directly fed into a roller crusher for shearing and pulverizing. Traditional roller crushers rely on continuous squeezing and dragging shearing by the rollers to pulverize the material. However, the branched waste material is prone to tangling and getting caught in each other, and the thin-walled flakes and flash easily slip and linger on the blade surface, making it difficult to cut the material instantly. The material remains under continuous dragging and friction. Repeated shearing and excessive grinding processes easily generate a large amount of filamentous debris and fine plastic and fiberglass dust, which is the core source of dust generation. When recycled materials with high dust levels and numerous filamentous debris are reused in injection molding, the filamentous debris, fine plastic dust, and free fiberglass dust have a larger specific surface area, easily adsorbing moisture and trapping air to form agglomerates. After plasticizing and heating, these agglomerates continuously release gas, forming bubble nuclei, causing porosity and surface pitting problems in the propellers. This severely reduces the quality of the finished propellers and makes it difficult to meet the production requirements for low-dust, high-quality recycling of irregularly shaped waste materials generated during UAV propeller injection molding. Therefore, we propose a waste material recycling device for UAV propeller injection molding. Summary of the Invention

[0004] The purpose of this invention is to provide a waste recycling device for injection molding of drone propellers, in order to solve the technical problem that a large amount of dust is easily generated during the recycling and crushing of irregularly shaped waste materials due to dragging, friction and excessive grinding.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a waste recycling device for injection molding of UAV propellers, comprising a machine base, a crushing mechanism arranged on the side wall of the machine base, and a transfer mechanism and a cutting mechanism arranged on the top of the machine base; the transfer mechanism has three working stations arranged along a circular path, namely a receiving station, a cutting station, and a flipping station, wherein each of the receiving station, the cutting station, and the flipping station is equipped with a cutting disc, and the three cutting discs are arranged in a circular array and can synchronously rotate around the center of the ring. The material can be cyclically switched between three workstations. The slitting mechanism is arranged above the slitting workstation. The slitting mechanism includes pressure plates and cross blades. The bottom of multiple pressure plates forms a pressure surface structure. A punching channel is formed between every two pressure plates. The cross blades are movably arranged in the punching channel. The pressure surface structure is used to press the injection molding waste material in the inner cavity of the cutting disc. The cross blades are used to punch the pressed injection molding waste material. The crushing mechanism is arranged below the flipping workstation. It is used to receive the material tilted and dumped by the flipping of the cutting disc and crush it.

[0006] Preferably, the slitting mechanism further includes a frame, which is mounted on the top of the machine base. A first cylinder is mounted on the top of the frame, and the output end of the first cylinder is connected to a lifting frame. The lifting frame is vertically slidably arranged on the inner side wall of the frame. An air plate is connected to the bottom of the lifting frame, and multiple sliding rods are connected to the bottom of the air plate. The multiple sliding rods are arranged in a rectangular array, and the pressure plate is connected to the bottom of the sliding rods. The multiple pressure plates are arranged in a rectangular array to form the pressing surface structure. The first cylinder is used to drive the lifting frame to move the pressure plate downward to press the injection molding waste material.

[0007] Preferably, the lifting frame includes an inner solid plate, a second cylinder is installed on the top of the inner solid plate, the output end of the second cylinder is connected to a lifting plate, a punch plate is connected to the bottom of the lifting plate through multiple lifting columns, multiple knife holders are installed at the bottom of the punch plate, and the cross blades are installed at the bottom of the knife holders. The multiple cross blades are arranged in a rectangular array. The lifting plate is arranged below the inner solid plate. The lifting columns movably pass through the bottom of the lifting frame and the bottom of the air plate, and extend to the area between the sliding rods arranged at the four corners of each rectangle. The punch plate is arranged between the air plate and the pressure plate. The pressure plate is movably arranged in the rectangular groove formed by the cross blades arranged at the four corners of the rectangle. The second cylinder is used to drive the lifting plate to drive the cross blades to move downward for punching.

[0008] Preferably, the side wall of the air plate is connected to an air inlet pipe, the inner cavity of the air plate is arranged with an air inlet chamber, the output end of the air inlet pipe is connected to the air inlet chamber, the inner cavity of the slide rod is arranged with an air inlet channel and an exhaust channel, the inner cavity of the pressure plate is arranged with a cooling channel, the air inlet chamber is connected to the cooling channel through the air inlet channel, multiple airflow pipes are arranged in the air inlet chamber, the air inlet end of the airflow pipe is connected to the cooling channel through the exhaust channel, the output end of the airflow pipe is arranged at the top of the air plate, the side wall of the lifting frame is connected to an exhaust pipe, the bottom of the lifting frame has a concave structure, the concave structure at the bottom of the lifting frame and the top of the air plate form an exhaust chamber, the exhaust pipe is connected to the exhaust chamber, the output end of the airflow pipe is connected to the exhaust chamber, and the cooling channel is used to introduce cooling airflow to cool the waste material by the pressure plate.

[0009] Preferably, a columnar channel 1 is formed between multiple rectangular corner-arranged blade holders, and a columnar channel 2 is formed from top to bottom on the punch plate. The columnar channel 1 and the columnar channel 2 are connected. Multiple ventilation grooves are arranged on the inner sidewalls of both the columnar channel 1 and the columnar channel 2. The slide rod is movably arranged in the columnar channel 2 and extends into the columnar channel 1 and the rectangular groove. A slide cylinder is arranged through the air plate from top to bottom. The bottom end of the slide cylinder is arranged between every four rectangular corner-arranged slide rods, and the top end of the slide cylinder penetrates the bottom of the lifting frame and extends into its inner cavity. The lifting column is movably arranged in the inner cavity of the slide cylinder.

[0010] Preferably, the transfer mechanism further includes a fixed base, a geared motor, a rotating rod, a rotating block, and a drive column. The fixed base is installed on the top of the machine base, the geared motor is arranged on the inner side wall of the fixed base, the output end of the geared motor is connected to the rotating rod, the top of the rotating rod is connected to the rotating block, the rotating block is rotatably arranged on the top of the fixed base, and the drive column is connected to the side wall of the cutting disc and is rotatably connected to the side wall of the rotating block.

[0011] Preferably, the transfer mechanism further includes a support frame, which is installed on the top of the machine base. An annular rail is mounted on the support frame. A limiting groove is formed on the inner circumference of the annular rail. An arc-shaped toothed plate is connected to the bottom of the annular rail. A movable groove is formed on the top of the annular rail. The structure of the annular rail in the flipping station area includes an arc-shaped groove. The two ends of the limiting groove are connected through the arc-shaped groove. A support column is connected to the other side wall of the cutting disc. A gear is arranged on the outer circumference of the support column. A slider is connected to the end of the support column. The gear is clearance-fitted with the inner side wall of the annular rail. The slider is slidably arranged in the limiting groove. When the slider slides into the arc-shaped groove area, the support column and the arc-shaped groove form a sliding support state, and the gear and the arc-shaped toothed plate form a meshing state to drive the cutting disc to flip.

[0012] Preferably, the slider is a strip-shaped plate structure, with both symmetrical ends of the slider having tapered arc-shaped head structures. The entry end of the limiting slide groove is provided with two guide plates, which are arranged symmetrically in an up-down position. The sidewalls of the guide plates are inclined structures, and the inclined structures of the two guide plates together form an open-shaped guide structure. The open-shaped guide structure is connected to the entry end of the limiting slide groove, and the guide plates are used to guide and correct the slider entering the limiting slide groove.

[0013] Preferably, the top of the fixed base is provided with a load-bearing platform, which is located in the slitting station area. When the cutting disc carrying waste material is switched to the slitting station, the cutting disc is located on the top of the load-bearing platform, and the load-bearing platform is used to form rigid support for the bottom of the cutting disc.

[0014] Preferably, the crushing mechanism includes a feed hopper, which is arranged below the tilting station.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constructs a two-stage crushing system with a pre-punching and a post-roller cutter by designing a transfer mechanism and a slitting mechanism. The three-station cutting disc of the transfer mechanism, which rotates in a ring, realizes automatic material collection, positioning and slitting, and automatic material conveying. Combined with the punching structure of the slitting mechanism, the injection molding waste material fed by the robot is first punched into multiple short blocks, forming a pre-treatment. Then, it is further refined and crushed by the crushing mechanism. This avoids the problem of long strips of waste material directly entering the roller cutter of the crushing mechanism for crushing, which easily leads to mutual hooking and entanglement, and the production of filamentous debris by the roller cutter dragging and stretching. It significantly reduces the fine plastic and glass fiber dust generated by the grinding of thin-walled gate sheets and flash. It can also stably control the maximum external size of the material entering the crushing mechanism, reduce the load on the roller cutter, and make the particle size of the recycled fragments after secondary refinement uniform. It reduces the polarization of ultrafine dust and ultra-large material blocks, and solves the technical problem that a large amount of dust is easily generated due to dragging friction and excessive grinding when recycling and crushing irregularly shaped waste materials.

[0016] 2. This invention also designs the slitting mechanism as a cooperating pressure plate structure and cross blade structure. In the initial stage, the cross blade is hidden in the punching channel. When the first cylinder drives the lifting frame to descend, the cross blade and the pressure plate descend synchronously into the inner cavity of the cutting disc. Relying on the synchronous pressure of multiple sets of pressure plates, the pressure surface structure formed by the multiple sets of pressure plates compresses the loose injection molding waste material in the inner cavity of the cutting disc. The injection molding waste material as a whole forms a limited and taut state, which can restrain the slippage and warping of dendritic waste material and thin-walled gate sheets. The cross blade hidden in the punching channel can prevent waste material from entering the gap between the pressure plates. After the pre-compression is completed, the second cylinder drives the lifting plate to move the punching plate and the cross blade down along the punching channel. The grid-like blade structure passes through the gap between the pressure plates to punch the already compressed and fixed waste material, cutting the long strip of main channel, branch channel, and gate flash waste material into short materials within a limited size area in one go. The block design first constrains the posture of loose injection molding waste in the inner cavity of the cutting disc through a pressure surface structure, and then punches it through a grid-like blade structure. This effectively avoids the disordered posture of the dendritic waste and the problems of deformation and free slippage of the waste plastic during multiple cross-blade punching, which can lead to local missed punching, incomplete punching, and the production of some long strip fragments. By first constraining and pressing the loose injection molding waste in the inner cavity of the cutting disc to prevent the material from tilting, the material cannot retreat to the sides during the blade punching and can only undergo pure shearing fracture along the blade edge. This solves the problem that dendritic irregular waste is in an unconstrained free state, and thin-walled gate sheets and flash are easily slipped, bent and retreated by the blade thrust, making it difficult to cut the material instantly. The punching process is mainly a tensile tearing process, which easily generates filamentous plastic fragments and free glass fiber dust.

[0017] 3. This invention also incorporates a cooling channel within the pressure plate cavity. When the first cylinder drives the lifting frame downwards, the cross blade and pressure plate simultaneously descend into the cutting disc cavity. The pressure surface structure formed by multiple pressure plates compresses the loose injection molding waste material within the cutting disc cavity. Simultaneously, the external cooling airflow supply device is activated, introducing low-temperature cooling airflow into the intake chamber via the intake pipe. The airflow is then transported along the intake channel inside the slide rod to the cooling channel within the pressure plate cavity. This ensures that the pressure surface structure formed by the multiple pressure plates is a low-temperature pressure surface structure, effectively controlling the waste material. The material is compressed and cooled to quickly remove the high temperature remaining after the injection molding waste material leaves the mold, solving the problem that the injection molding waste material still retains a high residual temperature and is relatively soft after leaving the mold. When cutting high-temperature soft waste material, it is very easy to be squeezed and stretched by the blade to form filamentous plastic. The high-temperature material is also easy to adhere to the blade of the cross blade and the surface of the pressure plate, causing material sticking and clogging. After being pre-cooled by the low-temperature pressure plate, the rigidity of the waste material is increased and the plasticity is reduced. The punching process is easier to achieve clean and crisp pure shearing breakage, which greatly reduces the generation of filamentous debris, melt sticking to the blade and dust.

[0018] 4. This invention also designs a ring-shaped rail frame, which, in conjunction with limiting grooves, arc-shaped grooves, arc-shaped toothed plates, and sliders and gears on the side wall of the cutting disc, achieves double-sided sliding limiting support throughout the entire ring-shaped rotation of the cutting disc. This effectively constrains the vertical floating and horizontal swaying of the cutting disc during operation, ensuring accurate positioning and smooth transfer between the three workstations. At the same time, the cutting disc can be automatically driven to flip and unload materials by relying solely on the meshing transmission between the gears and arc-shaped toothed plates during the rotation process. After unloading, it is synchronously flipped and reset. This integrates multiple functions such as rotation guidance, workstation positioning, and automatic flipping and unloading into a single ring-shaped rail frame structure, eliminating the need for additional independent actuators such as flipping drive cylinders and motors. This simplifies the overall transmission structure of the machine and reduces equipment manufacturing costs and potential failure points.

[0019] 5. This invention also designs both ends of the strip-shaped slider as tapered arc head structures, combined with the inclined structures of two guide plates to form an open-shaped guide structure. When the slider enters the limiting slide groove entrance with the circular rotation of the cutting disc, the tapered arc head can first smoothly contact the inclined surface of the guide plate. Relying on the inclined surface guidance, the slider with slight deviation is automatically corrected, and the slider is accurately guided into the limiting slide groove, avoiding the situation of the slider end getting stuck or scraping the edge of the limiting slide groove entrance. At the same time, the tapered arc head can disperse the local extrusion stress when the slider contacts the guide plate, reduce the wear and chipping of the slider end caused by long-term reciprocating friction, improve the smoothness of the circular transfer process of the transfer mechanism and the service life of the parts, and ensure that the cutting disc still maintains a stable and unobstructed rotation state after multiple rounds of station switching. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective.

[0022] Figure 3 This is a schematic diagram of the crushing mechanism of the present invention.

[0023] Figure 4 This is a schematic diagram of the transfer mechanism structure of the present invention.

[0024] Figure 5 This is a schematic diagram of a disassembled structure of the cutting disc and fixing base of the present invention.

[0025] Figure 6 This is a schematic diagram of the slider structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the annular track frame of the present invention.

[0027] Figure 8 This is a schematic diagram of the arc-shaped groove structure of the present invention.

[0028] Figure 9 This is a schematic diagram of the splitting structure of the cutting mechanism of the present invention.

[0029] Figure 10 This is a schematic diagram of the bottom structure of the lifting frame of the present invention.

[0030] Figure 11 This is a schematic diagram of the disassembled structure of the lifting frame and the punch plate of the present invention.

[0031] Figure 12 This is a schematic diagram of the cross blade structure of the present invention.

[0032] Figure 13 This is a schematic diagram of the disassembled structure of the lifting frame and air plate of the present invention.

[0033] Figure 14 This is a cross-sectional structural diagram of the air plate of the present invention.

[0034] Figure 15 This is a cross-sectional structural diagram of the lifting frame and air plate of the present invention.

[0035] Explanation of the labels in the diagram: 1. Machine platform; 2. Crushing mechanism; 3. Transfer mechanism; 4. Slitting mechanism; 201. Feed hopper; 301. Cutting disc; 302. Fixed base; 303. Gear motor; 304. Rotating rod; 305. Rotating block; 306. Drive column; 307. Support frame; 308. Circular rail frame; 309. Limiting groove; 310. Support column; 311. Gear; 312. Slider; 313. Arc-shaped toothed plate; 314. Movable groove; 315. Arc-shaped groove; 316. Guide plate; 401. Frame; 402. First cylinder; 403. Lifting frame; 404. Air plate; 405. Slide rod; 406. Pressure plate; 407. Inner solid plate; 408. Second cylinder; 409. Lifting plate; 410. Lifting column; 411. Punch plate; 412. Tool holder; 413. Cross blade; 414. Columnar channel one; 415. Columnar channel two; 416. Ventilation groove; 417. Inlet pipe; 418. Inlet chamber; 419. Inlet passage; 420. Exhaust passage; 421. Cooling passage; 422. Airflow pipe; 423. Exhaust pipe; 424. Exhaust chamber; 425. Slide cylinder. Detailed Implementation

[0036] like Figures 1 to 15 As shown, the present invention relates to a waste recycling device for injection molding of drone propellers, comprising a machine base 1, a crushing mechanism 2 arranged on the side wall of the machine base 1, and a transfer mechanism 3 and a cutting mechanism 4 arranged on the top of the machine base 1.

[0037] Among them, the crushing mechanism 2 is a conventional roller crusher structure, used to crush and process the injection molding waste of UAV propellers; the crushing mechanism 2 includes a feed hopper 201, after the injection molding waste is put into the feed hopper 201, it is conveyed downward and enters the roller cutter assembly inside the crushing mechanism 2. The crushing of the injection molding waste is completed by the roller cutters rotating in opposite directions, and the crushed material is discharged from the discharge hopper at the bottom of the crushing mechanism 2.

[0038] Specifically, the transfer mechanism 3 has three working stations arranged along the circular path, namely the receiving station, the slitting station, and the flipping station. Each of the receiving station, the slitting station, and the flipping station is equipped with a cutting disc 301 of the same structure. The three cutting discs 301 are arranged in a circular array and can rotate around the center of the ring synchronously. The cutting discs 301 can switch between the receiving station, the slitting station, and the flipping station by means of the circumferential rotation.

[0039] Furthermore, the slitting mechanism 4 is arranged above the slitting station. When the cutting disc 301 carrying the injection molding waste rotates to the slitting station and is positioned, the slitting mechanism 4 moves downward to perform overall punching on the injection molding waste inside the cutting disc 301, cutting the injection molding waste into multiple short blocks.

[0040] Furthermore, the tilting station is arranged above the feed hopper 201 of the crushing mechanism 2. After the cutting disc 301, which has completed the punching and segmentation, rotates to the tilting station, the cutting disc 301 automatically tilts and tilts, and all the waste material of the short blocks inside falls directly into the feed hopper 201 below and is sent to the crushing mechanism 2 for roller cutter fine crushing.

[0041] The entire device works synchronously with the injection molding production line: after the drone propeller mold is opened, the robotic arm first sorts and separates the finished propeller blades from the main channel and the branch channel to form irregular injection molding waste materials, and then puts all the waste materials into the cutting tray 301 at the receiving station to start a complete waste material cutting, crushing and recycling process.

[0042] This invention constructs a two-stage crushing system consisting of a transfer mechanism 3 and a slitting mechanism 4, employing a pre-punching and a post-roller cutter design. The three-station cutting disc 301 of the transfer mechanism 3, circulating in a ring, automatically receives, positions, slits, and conveys waste material. Combined with the punching structure of the slitting mechanism 4, the injection molding waste material fed by the robotic arm is first punched into multiple short blocks, forming a pre-treatment process. Then, the waste material undergoes further fine crushing via the crushing mechanism 2. This design fundamentally prevents long strips of waste material from directly entering the roller cutter of the crushing mechanism 2. The crushing process can easily lead to problems such as tangling and entanglement, and the production of filamentous debris due to dragging and stretching by the roller cutters. This process significantly reduces the amount of fine plastic and fiberglass dust generated by the grinding of thin-walled gate sheets and flash. It can also stably control the maximum size of the material entering the crushing mechanism, reduce the load on the roller cutters, and make the particle size of the recycled fragments after secondary refinement uniform. This reduces the polarization between ultrafine dust and ultra-large material blocks, and solves the technical problem of generating a large amount of dust due to dragging, friction and excessive grinding when recycling and crushing irregularly shaped waste materials.

[0043] In an embodiment of the present invention, the slitting mechanism 4 includes a frame 401 mounted on the top of the machine base 1. A first cylinder 402 is mounted on the top of the frame 401. The output end of the first cylinder 402 is connected to a lifting frame 403. The lifting frame 403 is vertically slidably arranged on the inner side wall of the frame 401. By using the first cylinder 402 for telescopic drive, the lifting frame 403 can be controlled to slide up and down along the vertical guide rail of the frame 401.

[0044] In another embodiment of the present invention, the bottom of the lifting frame 403 is connected to an air plate 404, and the bottom of the air plate 404 is connected to a plurality of slide rods 405. The plurality of slide rods 405 are arranged in a rectangular array, and the bottom of the slide rods 405 is connected to a pressure plate 406. The plurality of pressure plates 406 are arranged in a rectangular array to form a pressure surface structure. A punching channel is formed between every two pressure plates 406. The pressure surface structure is adapted to the inner cavity diameter of the cutting disc 301. When the first cylinder 402 controls the lifting frame 403 to perform a downward movement, the plurality of pressure plates 406 gradually move into the inner cavity of the cutting disc 301 at the slitting station. The pressure surface structure presses the loose injection molding waste material in the inner cavity of the cutting disc 301.

[0045] In another embodiment of the present invention, the lifting frame 403 includes an inner solid plate 407, a second cylinder 408 is installed on the top of the inner solid plate 407, the output end of the second cylinder 408 is connected to a lifting plate 409, the bottom of the lifting plate 409 is connected to a punch plate 411 through a plurality of lifting columns 410, a plurality of knife holders 412 are installed on the bottom of the punch plate 411, and a cross knife 413 is installed on the bottom of the knife holder 412, the blade of the cross knife 413 having a cross-shaped structure.

[0046] Among them, multiple cross blades 413 are arranged in a rectangular array, and the blades of multiple cross blades 413 together form a grid-like blade structure. Through the grid-like blade structure, the dendritic irregular waste material in the cutting disc 301, which has been pressed by the pressing surface structure, can be synchronously cross-cut in the whole area, and the waste material of the long main channel, branch channel, and gate flash can be cut into short blocks within a limited size area in one go.

[0047] Furthermore, the blade sidewalls of the four adjacent rectangular corner-arranged cross-shaped cutters 413 can enclose and form a rectangular groove; multiple cutter holders 412 are arranged in a rectangular array, and a columnar channel 414 is formed between each of the four adjacent rectangular corner-arranged cutter holders 412, and the columnar channel 414 is in a connected state with the rectangular groove; the punch plate 411 has multiple columnar channels 415 with the same structure as the columnar channel 414 from top to bottom, and the columnar channel 414 and the columnar channel 415 are in a connected state.

[0048] Furthermore, the lifting plate 409 is arranged below the inner solid plate 407, and the lifting column 410 movably passes through the bottom of the lifting frame 403 and the bottom of the air plate 404, and extends to the area between the four rectangular corner slide rods 405; the punch plate 411 is arranged between the air plate 404 and the pressure plate 406, and the slide rods 405 are movably arranged in the columnar channel 2 415 of the punch plate 411, and extend to the columnar channel 1 414 of the four cutter seats 412, and the rectangular groove of the four rectangular corner cross cutters 413. The pressure plate 406 is movably arranged in the rectangular groove, and correspondingly, the cross cutter 413 is movably arranged in the punching channel.

[0049] This invention also designs the slitting mechanism 4 as a cooperating pressure plate 406 structure and a cross blade 413 structure. In the initial stage, the cross blade 413 is hidden in the punching channel. When the first cylinder 402 drives the lifting frame 403 to descend, the cross blade 413 and the pressure plate 406 descend synchronously into the inner cavity of the cutting disc 301. Relying on the synchronous pressure of multiple sets of pressure plates 406, the pressure surface structure formed by the multiple sets of pressure plates 406 compresses the loose injection molding waste material in the inner cavity of the cutting disc 301. The material is in a constrained and taut state, which can restrain the slippage and warping of dendritic waste and thin-walled gate sheets. The cross blade 413 hidden in the punching channel can prevent waste from entering the gap of the pressure plate 406. After pre-compression, the second cylinder 408 drives the lifting plate 409 to move the punching plate 411 and the cross blade 413 down along the punching channel. The grid-like blade structure passes through the gap of the pressure plate 406 to punch the already compressed and fixed waste, and in one go, the long main channel, branch channel, and The waste material from the gate flash is cut into short blocks within a defined size area. The loose injection molding waste material in the inner cavity of the cutting disc 301 is first constrained by the pressure surface structure, and then punched by the grid-like blade structure. This effectively avoids the problem of disordered posture of the tree-shaped waste material. When multiple cross blades 413 punch, there is deformation and free slippage of the waste plastic, resulting in local missed punching and incomplete punching, and still producing some long strip fragments. By first constraining and pressing the loose injection molding waste material in the inner cavity of the cutting disc 301 to prevent the material from tilting, the material cannot retreat to the sides when the blade punches. It can only undergo pure shearing fracture along the blade edge. This solves the problem that tree-shaped waste material is in an unconstrained free state, and thin-walled gate sheets and flash are easily slipped, bent and retreated by the blade thrust. The material is difficult to cut instantly, and the punching process is mainly a tensile tearing process. Tensile tearing is very easy to generate filamentous plastic fragments and free glass fiber dust.

[0050] In another embodiment of the present invention, the inner walls of columnar channel one 414 and columnar channel two 415 are provided with a plurality of ventilation grooves 416 of the same structure in a connected state to ensure smooth airflow inside the rectangular channel. The airflow inside the rectangular channel can be quickly discharged and replenished through the ventilation grooves 416 to avoid air pressure blockage in the rectangular channel when the pressure plate 406 and the cross blade 413 move relative to each other, which would cause the movement to be obstructed.

[0051] In another embodiment of the present invention, an air inlet pipe 417 is connected to the side wall of the air plate 404, and an air inlet chamber 418 is arranged inside the air plate 404. The output end of the air inlet pipe 417 is connected to the air inlet chamber 418. An air inlet channel 419 and an exhaust channel 420 are arranged inside the slide rod 405, and a cooling channel 421 is arranged inside the pressure plate 406. The air inlet chamber 418 is connected to the cooling channel 421 through the air inlet channel 419. A plurality of airflow pipes 422 are arranged inside the air inlet chamber 418, and airflow pipes 422 intake air. The end is connected to the cooling channel 421 through the exhaust channel 420, and the output end of the airflow pipe 422 is arranged on the top of the air plate 404; the side wall of the lifting frame 403 is connected to the exhaust pipe 423, the bottom of the lifting frame 403 is a concave structure, and the concave structure at the bottom of the lifting frame 403 and the top of the air plate 404 form an exhaust chamber 424, the exhaust pipe 423 is connected to the exhaust chamber 424, and the output end of the airflow pipe 422 is connected to the exhaust chamber 424; wherein, the air inlet pipe 417 is connected to the output end of the external cooling airflow supply equipment.

[0052] This invention also incorporates a cooling channel 421 within the inner cavity of the pressure plate 406. When the first cylinder 402 drives the lifting frame 403 downwards, the cross blade 413 and the pressure plate 406 simultaneously descend into the inner cavity of the cutting disc 301. As the pressure surface structure formed by multiple pressure plates 406 presses the loose injection molding waste material within the inner cavity of the cutting disc 301, the external cooling airflow supply device is simultaneously activated. Low-temperature cooling airflow is introduced into the air intake chamber 418 via the air intake pipe 417. The airflow is then transported along the air intake channel 419 inside the slide rod 405 to the cooling channel 421 within the inner cavity of the pressure plate 406. This ensures that the pressure surface structure formed by multiple pressure plates 406 is a low-temperature pressure surface structure, capable of pressing and cooling the waste material rapidly. The process removes the residual high temperature of the injection molding waste material after mold opening, solving the problem that the injection molding waste material still retains a high residual temperature and is relatively soft after leaving the mold. When cutting high-temperature soft waste material, it is very easy to be squeezed and stretched by the blade to form filamentous plastic. Moreover, the high-temperature material is easy to adhere to the blade of the cross blade 413 and the surface of the pressure plate 406, causing material sticking and clogging. After being pre-cooled by the low-temperature pressure plate 406, the rigidity of the waste material is increased and the plasticity is reduced. The punching process is easier to achieve clean and neat pure shearing fracture, greatly reducing the generation of filamentous debris, melt sticking to the blade and dust. The cold airflow of the cooling channel 421 removes the heat of the waste material and enters the exhaust chamber 424 through the exhaust channel 420 and the airflow pipe 422, and is finally discharged through the exhaust pipe 423.

[0053] In another embodiment of the present invention, a slide cylinder 425 is arranged through the air plate 404 from top to bottom. The bottom end of the slide cylinder 425 is arranged between the four rectangular corner slide rods 405. The top end of the slide cylinder 425 passes through the bottom of the lifting frame 403 and extends into its inner cavity, located below the inner solid plate 407. The lifting column 410 is movably arranged in the inner cavity of the slide cylinder 425. By designing the slide cylinder 425, it can ensure the coaxial guidance and limit of the lifting column 410 during its up and down reciprocating movement, avoid the left and right deviation and swaying of the lifting column 410 during its reciprocating extension and retraction, and ensure that the cross blade 413 punching action is vertical, regular and without deviation. It can also ensure the airflow of the air inlet chamber 418 inside the air plate 404 is sealed and isolated, blocking the cooling airflow in the air inlet chamber 418 from rushing upward along the outer wall of the lifting column 410 into the exhaust chamber 424 of the inner cavity of the lifting frame 403, and maintaining the independent and unobstructed cooling airflow circuit.

[0054] In an embodiment of the present invention, the transfer mechanism 3 includes a fixed base 302 mounted on the top of the machine base 1. A reduction motor 303 is arranged on the inner side wall of the fixed base 302. A rotating rod 304 is connected to the output end of the reduction motor 303. A rotating block 305 is connected to the top of the rotating rod 304. The rotating block 305 is rotatably arranged on the top of the fixed base 302. A drive column 306 is connected to the side wall of the cutting disc 301. The drive column 306 is rotatably connected to the side wall of the rotating block 305.

[0055] Once the entire equipment is started and running, and the robotic arm completes the receiving process by placing the injection-molded irregular-shaped waste material into the cutting disc 301 at the receiving station, the geared motor 303 starts and outputs a constant torque to drive the rotating rod 304 to rotate at a uniform speed. The rotating rod 304 synchronously drives the top rotating block 305 to rotate smoothly on the top of the fixed seat 302. The rotating block 305 synchronously pulls the three sets of circularly arrayed cutting discs 301 to rotate in a circular cycle through the drive column 306 hinged to the side wall. Relying on the low speed and high torque transmission characteristics of the geared motor 303, the rotation of the cutting disc 301 can be started and stopped. The process is smooth and shock-free, preventing the tree-like waste material in the tray from scattering or stacking skewed due to violent shaking. After each fixed-angle rotation, the cutting tray 301 carrying the waste material is switched to the slitting station for positioning, waiting for the slitting mechanism 4 to press down and punch. After the punching process is completed, the reduction motor 303 drives the rotating block 305 to rotate again, transferring the cutting tray 301 containing the punched short material blocks to the flipping station to complete the unloading. The empty cutting tray 301 then cycles back to the receiving station to receive the next batch of waste material, thus realizing uninterrupted cyclical continuous operation of the three stations of receiving, slitting, and unloading.

[0056] As another embodiment of the present invention, the transfer mechanism 3 further includes a plurality of support frames 307 installed on the top of the machine base 1. An annular rail frame 308 is installed on the support frame 307. The annular rail frame 308 has an annular frame structure. A limiting groove 309 is formed on the inner circumference of the annular rail frame 308. The limiting groove 309 has a rectangular cross-section.

[0057] Furthermore, an L-shaped plate is connected to the bottom of the annular rail frame 308, and an arc-shaped toothed plate 313 is installed on the L-shaped plate. The arc-shaped toothed plate 313 is located at the cutting station.

[0058] Furthermore, the annular track frame 308 has an movable groove 314 on its top located between the cutting station and the flipping station. The structure of the annular track frame 308 in the flipping station area is a double arc strip structure, which includes an arc-shaped slide 315. The two ends of the limiting slide 309 are connected through the arc-shaped slide 315.

[0059] Furthermore, a support column 310 is connected to the other side wall of the cutting disc 301. The central axis of the support column 310 coincides with the central axis of the drive column 306. A gear 311 is arranged on the outer circumference of the support column 310. A slider 312 is connected to the end of the support column 310. The thickness of the slider 312 is the same as the diameter of the support column 310. The gear 311 is clearance-fitted with the inner side wall of the annular rail frame 308. The slider 312 is slidably arranged in the limiting groove 309. The slider 312 always remains horizontal in the limiting groove 309. When the slider 312 slides into the area of ​​the arc-shaped groove 315, the slider 312 is in a suspended state. The support column 310 and the arc-shaped groove 315 form a sliding support state, and the gear 311 and the arc-shaped toothed plate 313 form a meshing state.

[0060] The sliding support of the limiting groove 309 and the slider 312 ensures that the cutting disc 301 receives symmetrical support from both sides throughout its circular rotation. One side is hinged and pulled by the drive column 306, while the other side is smoothly limited by the slider 312 sliding along the rectangular limiting groove 309. This effectively restricts the cutting disc 301 from floating up and down or swaying left and right, ensuring accurate positioning and smooth operation during the three-station switching process. During the circular rotation, as the cutting disc 301 moves from the slitting station to the flipping station, the sliding groove... As block 312 gradually slides from the limiting groove 309 to the end area of ​​the movable groove 314, gear 311 and arc-shaped toothed plate 313 form a contact meshing state. As the cutting disc 301 continues to rotate, gear 311 rolls forward on the arc-shaped toothed plate 313, thereby driving the cutting disc 301 to flip. During this period, slider 312 simultaneously flips and moves to the side position of arc-shaped groove 315 at the end of the movable groove 314, forming a suspended state. At the same time, support column 310 enters arc-shaped groove 315, straight... After the cutting disc 301 completes its rotation and stops operating, it is completely located in the center of the rotation station. Through the rotation action, all the short, punched material inside falls into the feed hopper 201 below and is sent to the crushing mechanism 2 for roller cutter refining and crushing. Subsequently, the reduction motor 303 continues to drive the rotating block 305 to drive the cutting disc 301 to continue rotating along the annular track frame 308. At this time, the gear 311 continues to roll forward on the arc-shaped toothed plate 313, driving the cutting disc 301 to rotate and reset. When the reset is completed, the gear 311 disengages from the meshing constraint of the arc-shaped toothed plate 313, and the slider 312 slides back into the limiting groove 309 from the side position of the arc-shaped groove 315 to form a horizontal limit. The cutting disc 301 returns to a horizontal posture under the dual support of the limiting groove 309 and the drive column 306. The unloaded cutting disc 301 rotates back to the initial receiving station along the circular path, waiting for the injection molding robot to release the next batch of waste material, thus forming a continuous closed-loop operation of receiving, pressing, punching and flipping unloading.

[0061] This invention designs an annular track frame 308, which works in conjunction with limiting slide grooves 309, arc-shaped slide grooves 315, arc-shaped toothed plates 313, and sliders 312 and gears 311 on the side wall of the cutting disc 301. This achieves double-sided sliding limiting support throughout the annular rotation of the cutting disc 301, effectively constraining the vertical floating and horizontal swaying of the cutting disc 301 during operation. This ensures accurate positioning during the three-station switching and smooth transfer. At the same time, the cutting disc 301 can be automatically driven to flip and unload materials by relying solely on the meshing transmission between the gears 311 and the arc-shaped toothed plates 313 during the rotation process. After unloading, it is simultaneously flipped and reset. This integrates multiple functions such as rotation guidance, station positioning, and automatic material flipping and unloading into a single annular track frame 308 structure, eliminating the need for additional independent actuators such as flipping drive cylinders and motors. This simplifies the overall transmission structure and reduces equipment manufacturing costs and potential failure points.

[0062] In another embodiment of the present invention, the slider 312 is a strip-shaped plate structure. The strip-shaped plate structure can ensure that the slider 312 can only move along the groove path in the limiting groove 309 and cannot tilt horizontally, thereby ensuring the levelness of the cutting disc 301. Both ends of the slider 312 are tapered arc head structures. The entry end of the limiting groove 309 is provided with two guide plates 316. The two guide plates 316 are symmetrically arranged vertically. The sidewalls of the guide plates 316 are inclined structures. The inclined structures of the two guide plates 316 are combined to form an open-shaped guide structure, which is connected to the entry end of the limiting groove 309.

[0063] This invention also designs both ends of the strip-shaped slider 312 as tapered arc head structures, combined with the inclined structure of the two guide plates 316 to form an open-shaped guide structure. When the slider 312 enters the entrance of the limiting slide groove 309 with the circular rotation of the cutting disc 301, the tapered arc head can first make smooth contact with the inclined surface of the guide plate 316. Relying on the inclined surface guidance, the slider 312 with slight deviation is automatically corrected, and the slider 312 is accurately guided into the interior of the limiting slide groove 309, avoiding the situation where the end of the slider 312 gets stuck or scratches the edge of the entrance of the limiting slide groove 309. At the same time, the tapered arc head can disperse the local extrusion stress when the slider 312 contacts the guide plate 316, reduce the wear and chipping of the end of the slider 312 caused by long-term reciprocating friction, improve the smoothness of the operation of the transfer mechanism 3 in the circular transfer process and the service life of the parts, and ensure that the cutting disc 301 still maintains a stable and unobstructed rotation state after multiple rounds of workstation switching.

[0064] In another embodiment of the present invention, a load-bearing platform is arranged on the top of the fixed base 302. The load-bearing platform is located in the slitting station area. When the cutting disc 301 carrying waste material is switched to the slitting station for punching, the cutting disc 301 is exactly located on the top of the load-bearing platform. The load-bearing platform forms a full-area rigid support for the bottom of the cutting disc 301, bearing the huge axial punching load generated by the downward punching of the slitting mechanism 4, and avoiding deformation, sinking or torsional displacement of the cutting disc 301, drive column 306 and rotating block 305 under the punching force; ensuring that the inner cavity of the cutting disc 301 always remains horizontal and stable during the punching process, and the cross blade 413 is evenly subjected to vertical downward force, preventing uneven punching depth, incomplete cut pieces, and missed cutting of long strips of waste material caused by local force tilting. At the same time, it greatly reduces the instantaneous impact load on the transmission components such as the geared motor 303 and rotating rod 304, and extends the service life of each transmission component of the transfer mechanism 3.

[0065] Working Principle: This embodiment provides a waste material recycling device for injection molding of drone propellers. During use, after the drone propeller mold is opened, a robotic arm separates the finished product from the waste material and places the waste material into the cutting disc 301 at the receiving station of the transfer mechanism 3 on the top of the machine 1. The reduction motor 303 drives the three cutting discs 301 to rotate synchronously along the annular track 308 via the rotating rod 304, rotating block 305, and drive column 306. The slider 312 slides along the limiting groove 309 to achieve stable transfer. After the material-loaded cutting disc 301 switches to the slitting station, it is rigidly supported by the top load-bearing platform of the fixed seat 302. The first cylinder 402 of the slitting mechanism 4 drives the lifting mechanism. The frame 403 drives multiple pressure plates 406 to press down, compressing the loose waste material inside the cutting disc 301. External cooling airflow enters the air intake chamber 418 of the air plate 404 through the air intake pipe 417, and flows into the cooling channel 421 of the pressure plate 406 through the air intake channel 419 inside the slide rod 405, pre-cooling and stiffening the high-temperature waste material. After heat exchange, the airflow enters the exhaust chamber 424 through the exhaust channel 420 and airflow pipe 422, and is discharged through the exhaust pipe 423. After pre-cooling and compaction, the second cylinder 408 drives the lifting plate 409 and lifting column 410 to strike downwards, simultaneously driving the punch plate 411 and the multiple cross blades 413 at its bottom array to pass through the gaps in the pressure plate 406 to process the waste material. The grid-like punching process forms short blocks of material within a defined size from the waste material. After punching, the slitting mechanism 4 resets, and the reduction motor 303 drives the cutting disc 301 to move towards the flipping station again. During this process, the gear 311 on the outer side of the support column 310 meshes with the arc-shaped toothed plate 313, causing the cutting disc 301 to automatically flip. The slider 312 slides into the side of the arc-shaped groove 315, forming a suspended state. The short blocks in the disc automatically fall into the feed hopper 201 of the crushing mechanism 2 and enter the roller cutter for fine crushing, and then are recycled. After unloading, the reduction motor 303 continues to drive the rotating block 305 to drive the cutting disc 301 to continue rotating along the annular track frame 308. At this time, the gear 311 is on the arc-shaped toothed plate 313. 13 continues to roll forward, driving the cutting disc 301 to flip and reset. When the reset is completed, the gear 311 disengages from the meshing constraint of the arc-shaped toothed plate 313, and the slider 312 slides back into the limiting groove 309 from the side position of the arc-shaped groove 315 to form a horizontal limit. The cutting disc 301 returns to a horizontal posture under the dual support of the limiting groove 309 and the drive column 306. The unloaded cutting disc 301 rotates back to the initial receiving station along the circular path, waiting for the injection molding robot to release the next batch of waste material. This forms a continuous closed-loop operation of receiving, pressing and punching and flipping unloading. The whole set of equipment completes a two-stage low-dust closed-loop recycling process of waste material pre-low temperature pressing and punching and post-roll crushing.

[0066] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A waste recycling device for injection molding of drone propellers, characterized in that, include: The machine platform (1) has a crushing mechanism (2) arranged on its side wall and a transfer mechanism (3) and a cutting mechanism (4) arranged on its top. The transfer mechanism (3) has three working stations arranged along the circular path, namely the receiving station, the cutting station and the flipping station. Each of the receiving station, the cutting station and the flipping station is equipped with a cutting disc (301). The three cutting discs (301) are arranged in a circular array and can rotate around the center of the ring synchronously to switch between the three stations. The slitting mechanism (4) is arranged above the slitting station. The slitting mechanism (4) includes a pressure plate (406) and a cross blade (413). The bottom of the multiple pressure plates (406) forms a pressure surface structure. A punching channel is formed between every two pressure plates (406). The cross blade (413) is movably arranged in the punching channel. The pressure surface structure is used to press the injection waste material in the inner cavity of the cutting disc (301). The cross blade (413) is used to punch the pressed injection waste material. The crushing mechanism (2) is arranged below the flipping station and is used to receive the material that is flipped and dumped by the cutting disc (301) and crush it.

2. The unloading and waste recycling device for UAV propeller injection molding according to claim 1, characterized in that, The slitting mechanism (4) further includes a frame (401), which is installed on the top of the machine base (1). A first cylinder (402) is installed on the top of the frame (401). The output end of the first cylinder (402) is connected to a lifting frame (403). The lifting frame (403) is vertically slidably arranged on the inner side wall of the frame (401). An air plate (404) is connected to the bottom of the lifting frame (403). A plurality of slide rods (405) are connected to the bottom of the air plate (404). The plurality of slide rods (405) are arranged in a rectangular array. The bottom of the slide rods (405) is connected to the pressure plate (406). The plurality of pressure plates (406) are arranged in a rectangular array to form the pressing surface structure. The first cylinder (402) is used to drive the lifting frame (403) to drive the pressure plate (406) to descend and press the injection molding waste.

3. The unloading and waste recycling device for UAV propeller injection molding according to claim 2, characterized in that, The lifting frame (403) includes an inner solid plate (407). A second cylinder (408) is mounted on the top of the inner solid plate (407). The output end of the second cylinder (408) is connected to a lifting plate (409). A punch plate (411) is connected to the bottom of the lifting plate (409) through multiple lifting columns (410). Multiple cutter holders (412) are mounted on the bottom of the punch plate (411). Cross cutters (413) are mounted on the bottom of the cutter holders (412). The multiple cross cutters (413) are arranged in a rectangular array. The lifting plate (409) is arranged on the inner solid plate. Below the plate (407), the lifting column (410) moves through the bottom of the lifting frame (403) and the bottom of the air plate (404), and extends to the area between the sliding rods (405) arranged at the four corners of each rectangle. The punch plate (411) is arranged between the air plate (404) and the pressure plate (406). The pressure plate (406) is movably arranged in the rectangular groove formed by the cross cutters (413) arranged at the four corners of the rectangle. The second cylinder (408) is used to drive the lifting plate (409) to drive the cross cutters (413) to move downwards to punch.

4. The unloading and waste recycling device for UAV propeller injection molding according to claim 3, characterized in that, The side wall of the air plate (404) is connected to an air inlet pipe (417). An air inlet chamber (418) is arranged inside the air plate (404). The output end of the air inlet pipe (417) is connected to the air inlet chamber (418). An air inlet channel (419) and an exhaust channel (420) are arranged inside the slide rod (405). A cooling channel (421) is arranged inside the pressure plate (406). The air inlet chamber (418) is connected to the cooling channel (421) through the air inlet channel (419). Multiple airflow pipes (422) are arranged inside the air inlet chamber (418). The air inlet end of the airflow pipe (422) is connected to the exhaust channel (420) through the exhaust channel (419). 20) The airflow pipe (422) is connected to the cooling channel (421), and the output end of the airflow pipe (422) is arranged on the top of the air plate (404). The side wall of the lifting frame (403) is connected to the exhaust pipe (423). The bottom of the lifting frame (403) is a concave structure. The concave structure at the bottom of the lifting frame (403) and the top of the air plate (404) form an exhaust chamber (424). The exhaust pipe (423) is connected to the exhaust chamber (424). The output end of the airflow pipe (422) is connected to the exhaust chamber (424). The cooling channel (421) is used to introduce cooling airflow so that the pressure plate (406) cools down the waste material.

5. A waste recycling device for injection molding of UAV propellers according to claim 4, characterized in that, A columnar channel one (414) is formed between multiple rectangular knife holders (412) arranged at four corners. A columnar channel two (415) is formed from top to bottom on the punch plate (411). The columnar channel one (414) and the columnar channel two (415) are connected. Multiple ventilation grooves (416) are arranged on the inner sidewalls of both the columnar channel one (414) and the columnar channel two (415). The slide rod (405) is movably arranged in the columnar channel two. (415) and extends into the columnar channel (414) and into the rectangular groove; the air plate (404) is provided with a sliding cylinder (425) from top to bottom, the bottom end of the sliding cylinder (425) is arranged between the sliding rods (405) arranged at the four corners of each rectangle, the top end of the sliding cylinder (425) penetrates the bottom of the lifting frame (403) and extends into its inner cavity, and the lifting column (410) is movably arranged in the inner cavity of the sliding cylinder (425).

6. A waste recycling device for injection molding of UAV propellers according to claim 5, characterized in that, The transfer mechanism (3) further includes a fixed base (302), a reduction motor (303), a rotating rod (304), a rotating block (305), and a drive column (306). The fixed base (302) is installed on the top of the machine base (1). The reduction motor (303) is arranged on the inner side wall of the fixed base (302). The output end of the reduction motor (303) is connected to the rotating rod (304). The top of the rotating rod (304) is connected to the rotating block (305). The rotating block (305) is rotatably arranged on the top of the fixed base (302). The drive column (306) is connected to the side wall of the cutting disc (301). The drive column (306) is rotatably connected to the side wall of the rotating block (305).

7. A waste recycling device for injection molding of UAV propellers according to claim 6, characterized in that, The transfer mechanism (3) further includes a support frame (307), which is installed on the top of the machine base (1). A ring rail frame (308) is installed on the support frame (307). A limiting groove (309) is opened on the inner circumference of the ring rail frame (308). An arc-shaped toothed plate (313) is connected to the bottom of the ring rail frame (308). A movable groove (314) is opened on the top of the ring rail frame (308). The structure of the ring rail frame (308) in the flipping station area includes an arc-shaped groove (315). The two ends of the limiting groove (309) are connected through the arc-shaped groove (315). The cutting disc (30) 1) A support column (310) is connected to the other side wall. A gear (311) is arranged on the outer circumference of the support column (310). A slider (312) is connected to the end of the support column (310). The gear (311) is in clearance fit with the inner side wall of the annular rail frame (308). The slider (312) is slidably arranged in the limiting groove (309). When the slider (312) slides into the area of ​​the arc-shaped groove (315), the support column (310) and the arc-shaped groove (315) form a sliding support state, and the gear (311) and the arc-shaped toothed plate (313) form a meshing state to drive the cutting disc (301) to flip.

8. A waste recycling device for injection molding of UAV propellers according to claim 7, characterized in that, The slider (312) is a strip-shaped plate structure. Both ends of the slider (312) are tapered arc head structures. The entry end of the limiting slide groove (309) is provided with two guide plates (316). The two guide plates (316) are arranged symmetrically in the upper and lower positions. The side wall of the guide plate (316) is a slope structure. The slope structures of the two guide plates (316) are combined to form an open-shaped guide structure. The open-shaped guide structure is connected to the entry end of the limiting slide groove (309). The guide plate (316) is used to guide and correct the slider (312) entering the limiting slide groove (309).

9. A waste recycling device for injection molding of UAV propellers according to claim 8, characterized in that, The fixed base (302) has a load-bearing platform on top, which is located in the slitting station area. When the cutting disc (301) carrying waste material is switched to the slitting station, the cutting disc (301) is located on top of the load-bearing platform, and the load-bearing platform is used to form a rigid support for the bottom of the cutting disc (301).

10. A waste recycling device for injection molding of UAV propellers according to claim 9, characterized in that, The crushing mechanism (2) includes a feed hopper (201) which is arranged below the tilting station.

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