Secondary molding device and processing method based on recycled cyclic polyethylene particles

Abstract

The application relates to the technical field of plastic forming equipment, in particular to a secondary forming device based on recycled and regenerated polyethylene particles and a processing method.The secondary forming device comprises a machine body and a rotary frame; the machine body is provided with a circular accommodating space above the machine body, the accommodating space is internally provided with an annular track, the bottom of the accommodating space is provided with a guide track and a blanking port in communication with the outside, the left side of the accommodating space is provided with an oil supply channel, the front end and the rear end of the accommodating space are both provided with a puller, the center of the accommodating space is provided with a feeding assembly, and a plurality of rubbing components are arranged on the feeding assembly; the rotary frame is installed in the accommodating space and is provided with a plurality of forming components, one end of the forming component is in contact with the annular track, and the other end of the forming component is in contact with the feeding assembly; the application changes the traditional production mode through the cooperation of various components, the overall structure is compact, the generation of scraps in the production process is avoided, the production of flat plastic particles can be realized, and the practicability is effectively enhanced.

Description

Technical Field

[0001] This invention relates to the field of plastic molding equipment technology, and in particular to a secondary molding device and processing method based on recycled polyethylene granules. Background Technology

[0002] Plastics are widely used in various aspects of life. From the perspective of environmental protection and resource utilization, used plastics are usually recycled and reused to improve utilization efficiency. Currently, waste plastics are washed and crushed in the early stage, and then formed into plastic pellets through injection molding, cooling, drying and cutting. However, this molding process is relatively complex, involving a variety of production equipment, a long production line, and a large factory area. At the same time, a large amount of plastic waste is generated during cutting, resulting in waste. Moreover, the traditional pellet shape often cannot meet specific production needs when there are high requirements for flowability and mixing effect, which limits its application range and is very inconvenient. Therefore, there is an urgent need for a more versatile plastic molding device. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned technical deficiencies by providing a secondary molding device and processing method based on recycled polyethylene granules. Through the coordinated cooperation of various components, the traditional production method is changed, the overall structure is compact, the generation of debris during the production process is avoided, and flat plastic granules can be produced, thus effectively enhancing practicality.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is a secondary molding device based on recycled polyethylene granules, comprising: a machine body and a rotating frame; the machine body has a circular receiving space above it, the receiving space is provided with an annular track, and the bottom is provided with a guide track and a material discharge port communicating with the outside; the left side of the receiving space is provided with an oil supply channel; the front and rear ends of the receiving space are provided with retracting components; the center of the receiving space is provided with a feeding component, and the feeding component is provided with multiple sets of kneading components; the rotating frame is installed in the receiving space and is provided with multiple sets of molding components, one end of the molding component is in contact with the annular track, and the other end is in contact with the feeding component.

[0005] Preferably, the feeding assembly includes a feeding cylinder and a ring-cutting tube; a plurality of discharge holes are provided directly above the feeding cylinder; the ring-cutting tube is sleeved with the feeding cylinder and has six sets of arrangement holes distributed along the circumference, the number of arrangement holes in each set corresponding to the number of discharge holes.

[0006] Preferably, the kneading component includes a support plate and a combination rod; the support plates are arranged in pairs on the feeding assembly, with a left rod on the left support plate and a right rod on the right support plate, both the left and right rods being equipped with a pressure plate and a return spring, and the right end of the right rod being equipped with a mounting plate; the combination rod is slidably connected to the support plate, and both ends are connected to the mounting plate respectively.

[0007] Preferably, the left rod and the support plate are connected by a thread.

[0008] Preferably, a limiting ring is provided on the support plate on the left side.

[0009] Preferably, the molded part includes a sleeve, an intermediate rod, and a slide; one end of the sleeve is provided with a slider connected to an annular track, and the other end is connected to a rotating frame; the intermediate rod is slidably connected to the sleeve, and a first spring is provided on the left side of the intermediate rod in contact with the sleeve, and a combination plate is provided on the right end of the intermediate rod; the slide is slidably connected to the right side of the intermediate rod, and a second spring is provided in contact with the right end of the intermediate rod; a ring is provided on the right side of the slide, and the ring and the combination plate form a molding space for the raw material to enter.

[0010] Preferably, the intermediate rod is provided with an insertion hole, and a pull rod connected to another molded part is provided in the insertion hole. A T-shaped frame is provided on the left side of the slide, and a force-bearing rod is provided on one side of the T-shaped frame, and a fixing plate connected to another molded part is provided at the other end.

[0011] Preferably, the diameter of the combination disc is smaller than the inner diameter of the ring and forms a coating gap with the inner wall of the ring. The combination disc has an inclined surface, an internal liquid outlet, and an air inlet groove on the left side. The left side of the ring has an exhaust hole that communicates with the air inlet groove.

[0012] Preferably, a cooling and cleaning component is provided below the material discharge port; the cooling and cleaning component includes a collection box, an extrusion shaft, and a screw shaft; the collection box is fixedly connected to the machine body, and baffles are provided on both sides of the inlet of the collection box, and nozzles are provided on the baffles; the extrusion shafts are arranged in pairs above the collection box, and extrusion grooves are provided along the axial direction of the extrusion shafts, and a guide groove is provided below the two extrusion shafts; the screw shaft is installed in the guide groove.

[0013] The processing method based on a secondary molding device for recycled polyethylene granules includes the following steps: S1. The raw material for injection molding is injected into the sliding sleeve (902) and, after a period of time, drives the rotary frame 2 and the ring-cut tube 402 to rotate at a certain angle. S2, the liquid supply ring 14 supplies coolant to the liquid inlet 15 and completes the cooling of the area of ​​the arrangement hole 404; S3. Drive the pull rod 804 through the guide rail 103, so that the ring 902 extends out of the arrangement hole 404 and is squeezed and kneaded into shape by the kneading part 5. S4. After the plastic granules fall off, as the operation continues, the molded part 6 resets, the ring 902 re-enters the arrangement hole 404, and under the drive of the pull-out part 3, the release agent is applied to the inner wall of the ring 902, completing one cycle operation.

[0014] Compared with the prior art, the present invention has the following advantages: 1. By rotating the ring-cut tube and cooperating with the molding space on the molding part, the raw material can be directly generated into cylindrical granules. When it rotates to the bottom, it is driven by the pull-out part and the guide rail to complete the molding of flat plastic granules. The process is simple and convenient, and the overall structure is compact, making it suitable for production environments with limited space. 2. The number of molding parts, discharge holes and arrangement holes are corresponding, and multiple plastic granules can be molded at one time. With the corresponding number of kneading parts, the overall production efficiency is guaranteed. 3. All components are installed inside or around the storage space, effectively integrated together, reducing the factory area occupied. During operation, there is basically no need for staff intervention, which reduces labor costs and avoids operational risks compared to traditional construction. 4. After the granular raw material is released and the molded part rotates to the oil supply channel area, the mold release agent can be automatically filled, avoiding adhesion and ensuring that the equipment can operate stably for a long time without frequent mold cleaning, thus enhancing stability. 5. The kneading component relies on the pulling component to trigger the operation at a designated position, which can push the raw material particles out of the forming space and complete the pressing operation to form flat plastic particles, thus completing the plasticization of the raw material. The flat plastic particles can fall downward smoothly and be discharged. The overall layout is reasonable. 6. The structural design of the molded part can realize the function of accommodating raw material particles. During the addition of the release agent, the displacement of the ring and the cooperation between the combined discs can form a good coating effect. Furthermore, when the plastic raw material is added, the molded part is in a vertical downward position, which can protect the surface of the combined disc. The structural design is reasonable. 7. The design of the cooling and cleaning component allows for secondary molding of the flattened plastic granules, making the granules more rounded, improving their appearance and performance, and enhancing product competitiveness. Furthermore, the plastic granules that have undergone secondary molding fall into the guide trough to cool and solidify, and are then cleaned, forming the finished product. 8. During production, the extruded raw materials are directly converted into plastic granules and shaped in one step by the kneading parts, which simplifies the construction process, avoids waste of raw materials, and improves the utilization rate of raw materials. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure; Figure 2 A schematic diagram of the end structure of the accommodating space; Figure 3 This is a schematic diagram of the rear of the machine. Figure 4 This is a schematic diagram of a circumferentially cut pipe structure; Figure 5 This is a schematic diagram of the positioning track layout; Figure 6 This is a schematic diagram of the feed cylinder structure; Figure 7 This is a schematic diagram of the assembly structure of the kneading component. Figure 8 This is a schematic diagram of the kneading component structure; Figure 9 This is a schematic diagram of the assembly of the molded part; Figure 10 This is a schematic diagram of the molded part structure; Figure 11 This is a schematic diagram showing the connection between the sleeve and the intermediate rod; Figure 12 This is a sectional view of the connection between the combined disc and the ring sleeve. Figure 13 This is a schematic diagram of the cooling and cleaning component structure; Figure 14 This is a sectional view of the front end of the collection box; Figure 15 This is a side view of the collection box; Figure 16 This is a schematic diagram of the liquid supply ring structure.

[0016] In the diagram: 1. Machine body; 2. Rotary frame; 3. Retracting component; 4. Feeding assembly; 5. Kneading component; 6. Forming component; 7. Sleeve; 8. Intermediate rod; 9. Slide; 10. Cooling and cleaning component; 11. Collection box; 12. Extrusion shaft; 13. Screw shaft; 14. Liquid supply ring; 15. Liquid inlet; 16. Liquid outlet; 17. Positioning track; 18. Scraper; 101. Accommodation space; 102. Circular track; 103. Guide track; 104. Material discharge port; 105. Oil supply channel; 301. Second hydraulic cylinder; 401. Feeding cylinder; 402. Ring cutting pipe; 403. Discharge hole; 404. Arrangement hole; 501. Support plate; 502. 503. Combination rod; 504. Left rod body; 505. Right rod body; 506. Pressure plate; 507. Return spring; 508. Mounting plate; 509. Limiting ring; 7001. Slider; 801. First spring; 802. Combination plate; 803. Insertion hole; 804. Pull rod; 805. Coating gap; 806. Inclined surface; 807. Liquid outlet; 808. Air priming groove; 901. Second spring; 902. Ring sleeve; 903. T-shaped frame; 904. Force rod; 905. Fixing plate; 906. Exhaust hole; 1101. Baffle plate; 1102. Nozzle; 1103. Dividing plate; 1201. Extrusion groove; 1202. Material guide groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0018] Specific implementation method one: Combining Figure 1-16 As shown, a secondary molding device based on recycled polyethylene granules includes: a body 1 and a rotating frame 2; the body 1 has a circular receiving space 101 above it, and an annular track 102 is distributed along the axial direction inside the receiving space 101. The bottom of the receiving space 101 is provided with a guide track 103 and a material discharge port 104 connected to the outside. An oil supply channel 105 is provided on the left side of the receiving space 101. The oil supply channel 105 is connected to a liquid supply device through a pipeline to provide a release agent. The front and rear ends of the oil supply channel 105 are provided with pull-back components 3. The pull-back components 3 adopt a hydraulic cylinder structure. A contact plate is fixed on the push rod of the hydraulic cylinder. At the same time, pull-back components 3 are also arranged at the front and rear ends of the material discharge port 104. A feeding assembly 4 is provided in the center of the receiving space 101. Multiple sets of kneading components 5 are provided on the feeding assembly 4. The rotating frame 2 is installed in the receiving space 101 and is provided with multiple sets of molding components 6. One end of the molding component 6 contacts the annular track 102, and the other end contacts the discharge port of the feeding assembly 4.

[0019] Preferred embodiments, in combination Figure 2-6 As shown, the feeding assembly 4 includes a feeding cylinder 401 and a ring-cutting tube 402; the feeding cylinder 401 is connected to the injection molding machine, and multiple discharge holes 403 are provided on the top of the feeding cylinder 401; the ring-cutting tube 402 is sleeved with the feeding cylinder 401, and the rear end is machined with meshing teeth, which can be connected to the motor through gears to realize the drive of the ring-cutting tube 402 to rotate itself. The ring-cutting tube 402 itself has six sets of arrangement holes 404 distributed along the circumference, and the number of each set of arrangement holes 404 corresponds to the number of discharge holes 403. The molding space of the molded part 6 is accommodated in the arrangement holes 404, and the plastic raw material extruded from the feeding cylinder 401 enters the molding space through the discharge holes 403.

[0020] Preferred embodiments, in combination Figure 1 , Figure 7 and Figure 8 As shown, the kneading component 5 includes a support plate 501 and a combination rod 502; the support plates 501 are arranged in pairs and welded to the circumferential tube 402, located on both sides of the arrangement hole 404. Under normal conditions, they do not affect the displacement of the molding space. At the same time, a kneading component 5 is installed on both sides of each arrangement hole 404. The left support plate 501 is provided with a left rod 503, and the right support plate 501 is provided with a right rod 504. Both the left rod 503 and the right rod 504 are provided with a pressure plate 505 and a return spring 506, and the right end of the right rod 504 is provided with a mounting plate 507; the combination rod 502 and the support plate 501 are arranged in pairs and welded to the circumferential tube 402, located on both sides of the arrangement hole 404. Plate 501 forms a sliding support, and its two ends can be connected to the mounting plates 507 on the two sets of kneading parts 5 respectively, so as to synchronously drive multiple right rods 504 to move and extrude plastic particles to complete the plasticization process. Among them, the pressure plate 505 has an elliptical extrusion surface, which should cover the entire surface of the pressure plate 505 to reduce interference at the edge and extrude the plastic particles into a flat shape. At the same time, the pressure plate 505 on the left rod 503 is close to the ring 902. Under the push of the right rod 504, it can quickly clamp the plastic particles and prevent them from falling.

[0021] Preferred embodiments, in combination Figure 7 and Figure 8 As shown, the surface of the left rod 503 is machined with an external thread structure, and the hole of the support plate 501 is also machined with an internal thread. The two form a threaded connection, which can generate a certain rotational extrusion when the right rod 504 is pushed and displaced, thereby improving the kneading effect.

[0022] Preferred embodiments, in combination Figure 7 As shown, a limiting ring 508 is provided on the support plate 501 on the left side to assist in positioning the left rod 503.

[0023] Preferred embodiments, in combination Figure 7As shown, in order to avoid motion interference between the molded part 6 and the combined rod 502 when the molded part 6 rotates, the structure of the combined rod 502 and the mounting plate 507 can be moved upward, and the structure of the pressure plate 505 can be designed to move downward.

[0024] Preferred embodiments, in combination Figure 9-11 As shown, the molded part 6 includes a sleeve 7, an intermediate rod 8, and a slide 9. One end of the sleeve 7 is provided with a slider 701 connected to the annular track 102, and the oil outlets on the oil supply channel 105 are distributed in the annular track 102. The other end is connected to the rotating frame 2. The intermediate rod 8 is slidably connected to the sleeve 7, and the left side of the intermediate rod 8 is provided with a first spring 801 in contact with the sleeve 7. The right end of the intermediate rod 8 is provided with a combination plate 802. The slide 9 is slidably connected to the right side of the intermediate rod 8 and is provided with a second spring 901 in contact with the right end of the intermediate rod 8. The right side of the slide 9 is provided with a ring 902, and the ring 902 and the combination plate 802 form a molding space for the raw material to enter. The sleeve 7 and the intermediate rod 8 are hollow inside, and the slider 701 has a small hole communicating with the oil outlet. After being aligned with the oil supply channel 105, the release agent is discharged by the injection pressure of the oil supply channel 105.

[0025] Preferred embodiments, in combination Figure 9 and Figure 10 As shown, the intermediate rod 8 is provided with an insertion hole 803, and a pull rod 804 connected to another molded part 6 is provided in the insertion hole 803. Through the cooperation of the pull rod 804 and the nut, it can be connected to multiple intermediate rods 8, so that when triggered, multiple intermediate rods 8 can be moved synchronously. The left side of the slide 9 is provided with a T-shaped frame 903. One side of the T-shaped frame 903 is provided with a force rod 904, and the other end is provided with a fixing plate 905 connected to another molded part 6, which also realizes the connection of multiple slides 9 and maintains unified movement. Among them, the end of the pull rod 804 can be designed with a roller, which can be moved along the guide rail 103 after contacting the guide rail 103, reducing the frictional resistance during the displacement process and improving the displacement flexibility.

[0026] Preferred embodiments, in combination Figure 12As shown, the diameter of the combination disc 802 is smaller than the inner diameter of the ring 902, forming a coating gap 805 with the inner wall of the ring 902. The combination disc 802 has an inclined surface 806, which forms a certain solution space with the ring 902. Simultaneously, multiple liquid outlet holes 807 are distributed circumferentially inside the combination disc 802. An air venting groove 808 is provided on the left side, and an exhaust hole 906 communicating with the air venting groove 808 is provided on the left side of the ring 902. These two components work together to achieve communication with external air. The release agent is discharged through the liquid outlet holes 807 and, through the pull-out member 3, drives the slide 9 to move to the left, allowing the release agent to be coated on the inner wall of the ring 902. The maximum stroke is reached when the combination disc 802 is at the rightmost end of the ring, after which a reflow process begins. At position, the liquid outlet 807 remains in an oil-discharging state, enabling the coating operation again. Some of the release agent will slide onto the surface of the combination plate 802, while the coating gap 805 can stably form a protective layer on the inner wall of the ring 902. Excess release agent is stored in the solution space after the carriage 9 is fully reset. As the position of the subsequent molded part 6 changes, the excess solvent flows into the ring 902 along the coating gap 805 and gradually accumulates at the contact position between the ring 902 and the feed cylinder 401. When it moves to the discharge hole 403, the plastic raw material is discharged from the discharge hole 403, pushing the solvent to contact the surface of the combination plate 802, forming sufficient protection for the combination plate 802, avoiding adhesion, and ensuring stable discharge.

[0027] Preferred embodiments, in combination Figure 10 As shown, a cooling and cleaning component 10 is provided below the material discharge port 104 for secondary molding of plastic granules. Preferred embodiments, in combination Figure 1 , Figure 13 , Figure 14 and Figure 15As shown, the cooling and cleaning component 10 includes a collection box 11, an extrusion shaft 12, and a screw shaft 13. The collection box 11 is fixedly connected to the machine body 1. Baffles 1101 are provided on both sides of the inlet of the collection box 11, and nozzles 1102 are provided on the baffles 1101. The extrusion shafts 12 are arranged in pairs above the collection box 11. An extrusion groove 1201 is provided along the axial direction of the extrusion shaft 12. A guide groove 1202 is provided below the two extrusion shafts 12. The screw shaft 13 is installed in the guide groove 1202. Each motor drives the extrusion shaft 12 to rotate. The plastic raw material formed in one step falls from the discharge port 104 between the two extrusion shafts 12. The baffles 1101 provide protection and guidance. The plastic granules are smoothly slid down to the two extrusion shafts 12. After one-time molding, the plastic granules have a flat structure. When they fall into the extrusion groove 1201, it can ensure that the plastic granules are accurately positioned in the extrusion groove 1201 to achieve secondary extrusion. This is suitable for production situations where there are further requirements for the raw material granules. At the same time, the nozzle 1102 will continuously spray water to cool and wash the plastic granules and extrusion shaft 12. The plastic granules extruded in the secondary extrusion enter the guide groove 1202. The screw shaft 13 works to collect the plastic granules. The water and plastic granules are discharged together through the discharge pipe at the tail end for subsequent drying.

[0028] In a preferred embodiment, when a secondary molding operation is not required, the cooling and cleaning component 10 can remove part of the structure of the extrusion shaft 12, and only achieve the cleaning, cooling and collection of plastic particles.

[0029] In a preferred embodiment, a plurality of dividing plates 1103 are arranged in the area above the extrusion shaft 12. The dividing plates 1103 divide the area above the extrusion shaft 12 into various regions, so that the falling plastic raw material can fall smoothly into the extrusion groove 1201 for secondary molding.

[0030] Preferred embodiments, in combination Figure 15 As shown, scrapers 18 are provided on both sides of the feed trough 1202, which are in contact with the bottom of the extrusion shaft 12. The scrapers 18 can clean the extrusion shaft 12 and remove surface water stains, impurities, etc.

[0031] Preferred embodiments, in combination Figure 4 and Figure 14As shown, each group of holes 404 in the circumferential cutting tube 402 is surrounded by water channels, and each end has an inlet 15 and an outlet 16. By injecting water, the plastic material can be cooled below its melting point after being squeezed into the ring sleeve 902 by cooling the area of ​​the holes 404, which facilitates subsequent kneading and shaping. The inner diameter of the holes 404 is equal to the outer diameter of the ring sleeve 902, providing entry space. At the same time, the end of the circumferential cutting tube 402 is connected to a liquid supply ring 14, which has two annular spaces that are connected to the inlet 15 and the outlet 16 respectively. Liquid inlet and outlet operations can be realized even when the circumferential cutting tube 402 is rotating.

[0032] Preferred embodiments, in combination Figure 5 As shown, the positioning track 17 is located at the position of the oil supply channel 105. When the retracting component 3 is working, it can position the intermediate rod 8 to ensure that the carriage 9 moves under force alone and improve the stability of the structure.

[0033] Preferred embodiments, in combination Figure 2 As shown, at the pull-out part 3 located directly below, a second hydraulic cylinder 301 is installed above it to drive the kneading part 5 to operate.

[0034] The processing method based on a secondary molding device for recycled polyethylene granules includes the following steps: S1. The raw material for injection molding is injected into the sliding sleeve 902 and, after a period of time, drives the rotary frame 2 and the ring-cut tube 402 to rotate at a certain angle. S2, the liquid supply ring 14 supplies coolant to the liquid inlet 15 and completes the cooling of the area of ​​the arrangement hole 404; S3. Drive the pull rod 804 through the guide rail 103, so that the ring 902 extends out of the arrangement hole 404 and is squeezed and kneaded into shape by the kneading part 5. S4. After the plastic granules fall off, as the operation continues, the molded part 6 resets, the ring 902 re-enters the arrangement hole 404, and under the drive of the pull-out part 3, the release agent is applied to the inner wall of the ring 902, completing one cycle operation.

[0035] Working principle: The injection molding machine produces gel-like plastic raw material, which is injected into the ring 902 in the arrangement hole 404 through the discharge hole 403 on the feed cylinder 401. After a certain period of time according to a preset time, the motor drives the respective rotating frame 2 and the ring cutting tube 402 to rotate synchronously at a certain angle, so that the other component 6 is aligned with the discharge hole 403. During the rotation, the liquid supply ring 14 injects a certain amount of coolant into the liquid inlet 15 to cool the area of ​​the arrangement hole 404, thereby cooling the plastic raw material below the melting point. As it continues to rotate to the guide rail 103, the end of the pull rod 804 contacts the surface of the guide rail 103, and the maximum stroke is reached when the molded part 6 is directly below the receiving space. The intermediate rod 8 overcomes the elastic force of the first spring 801, causing the ring 902 to... 902 extends out from the arrangement hole 404 and is positioned at the kneading part 5. At this time, the second hydraulic cylinder 301 quickly pushes the mounting plate 807, triggering each right rod 504 to move to the left rod 503, thereby clamping and molding the plastic granules on the combination plate 802. After squeezing and kneading, and after releasing the clamping of the plastic granules, the plastic granules fall directly downwards through the discharge port 104, realizing the material discharge operation. As the rotation continues, the molding part 6 is reset, and the ring 902 re-enters the arrangement hole 404. When it reaches the leftmost side of the accommodating space, the positioning rail 17 contacts the pull rod 804 to prevent the middle rod 8 from shifting. Then, driven by the retracting part 3, the ring 902 is moved to achieve the application of the release agent, waiting for the next work, and repeating the above work stroke continuously.

[0036] Regarding the selection of release agents, silicone oil-based release agents are preferred. Silicone oil release agents are known for their excellent heat resistance, chemical inertness, and low surface tension, which can provide excellent release effects. They are suitable for occasions with high requirements for release performance and are compatible with the structural design of this device.

[0037] Regarding the design of this device, traditional manufacturing processes involve extruding plastic into round strips using an injection molding machine. At this point, the raw material temperature is relatively high. To form flat granules, rapid cutting is necessary, which is the first challenging aspect. After cutting, the next challenge is the extrusion of the plastic granules and their entry into the extrusion equipment, which is the second challenging aspect. Finally, the discharge and cooling after extrusion are the third challenging aspects, making implementation quite difficult. However, this device, through its structural design, changes the traditional construction methods, solves the above technical problems, and enables the discharge of flat granular raw materials.

[0038] Compared to traditional plastic granules, flat plastic granules offer several advantages. Firstly, they improve flowability in conveying pipelines, reducing the likelihood of blockages, especially in automated production lines where they facilitate smoother material transport. Secondly, their larger surface area allows for faster heat absorption and more uniform melting during subsequent processing (such as melting and mixing), shortening processing cycles and increasing production efficiency. The larger surface area also allows for more uniform dispersion of masterbatches or other additives within the substrate, resulting in products with consistent color distribution and physical properties. Thirdly, for applications requiring high filler content, such as composite material manufacturing, flat granules, due to their shape, can provide higher bulk density without compromising flowability, thus enhancing the mechanical strength and stability of the final product. Furthermore, certain production processes or product designs may require flat granules. For instance, in film blow molding, flat granules are easier to stretch into films, contributing to the formation of high-quality films. Finally, from a recycling perspective, flat granules are easier to handle because they can be more tightly stacked, reducing transportation and storage space, lowering logistics costs, and improving energy efficiency during recycling.

[0039] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A secondary molding device based on recycled polyethylene granules, characterized in that, include: The machine body (1) and the rotating frame (2) have a circular accommodating space (101) on the top of the machine body (1). The accommodating space (101) is provided with an annular track (102) inside, and a guide track (103) and a material drop port (104) communicating with the outside are provided at the bottom. An oil supply channel (105) is provided on the left side of the accommodating space (101). A pull-out component (3) is provided at the front and rear ends of the accommodating space (101). A feeding component (4) is provided at the center of the accommodating space (101). Multiple kneading components (5) are provided on the feeding component (4). The rotating frame (2) is installed in the accommodating space (101) and is provided with multiple forming components (6). One end of the forming component (6) is in contact with the annular track (102), and the other end is in contact with the feeding component (4). The feeding assembly (4) includes a feeding cylinder (401) and a ring-cutting tube (402); the feeding cylinder (401) has multiple discharge holes (403) directly above it; the ring-cutting tube (402) is sleeved with the feeding cylinder (401) and has six sets of arrangement holes (404) distributed along the circumference, the number of each set of arrangement holes (404) corresponding to the number of discharge holes (403); The kneading component (5) includes a support plate (501) and a combination rod (502); the support plates (501) are arranged in pairs on the feeding assembly (4), with a left rod (503) on the left support plate (501) and a right rod (504) on the right support plate (501). Both the left rod (503) and the right rod (504) are equipped with a pressure plate (505) and a return spring (506), and the right end of the right rod (504) is equipped with a mounting plate (507); the combination rod (502) is slidably connected to the support plate (501), and both ends are connected to the mounting plate (507) respectively. The molded part (6) includes a sleeve (7), an intermediate rod (8), and a slide (9); one end of the sleeve (7) is provided with a slider (701) connected to the annular track (102), and the other end is connected to the rotating frame (2); the intermediate rod (8) is slidably connected to the sleeve (7), and the left side of the intermediate rod (8) is provided with a first spring (801) in contact with the sleeve (7); the right end of the intermediate rod (8) is provided with a combination plate (802); the slide (9) is slidably connected to the right side of the intermediate rod (8), and is provided with a second spring (901) in contact with the right end of the intermediate rod (8); the right side of the slide (9) is provided with a ring (902), and the ring (902) and the combination plate (802) form a molding space for the raw material to enter; The intermediate rod (8) is provided with an insertion hole (803), and a pull rod (804) connected to another molded part (6) is provided in the insertion hole (803). A T-shaped frame (903) is provided on the left side of the slide (9). A force-bearing rod (904) is provided on one side of the T-shaped frame (903), and a fixing plate (905) connected to another molded part (6) is provided at the other end.

2. The secondary molding device based on recycled polyethylene granules according to claim 1, characterized in that: The left rod (503) and the support plate (501) are connected by threads.

3. The secondary molding device based on recycled polyethylene granules according to claim 2, characterized in that: A limiting ring (508) is provided on the support plate (501) on the left side.

4. The secondary molding device based on recycled polyethylene granules according to claim 1, characterized in that: The diameter of the combination plate (802) is smaller than the inner diameter of the ring (902), and forms a coating gap (805) with the inner wall of the ring (902). The combination plate (802) is provided with a slope (806), an outlet hole (807) is provided inside, and an air duct (808) is provided on the left side. The left side of the ring (902) is provided with an exhaust hole (906) that communicates with the air duct (808).

5. The secondary molding device based on recycled polyethylene granules according to claim 1, characterized in that: A cooling and cleaning component (10) is provided below the discharge port (104); the cooling and cleaning component (10) includes a collection box (11), an extrusion shaft (12) and a screw shaft (13); the collection box (11) is fixedly connected to the machine body (1), and baffles (1101) are provided on both sides of the inlet of the collection box (11), and nozzles (1102) are provided on the baffles (1101); the extrusion shafts (12) are arranged in pairs above the collection box (11), and an extrusion groove (1201) is provided along the axial direction of the extrusion shaft (12), and a guide groove (1202) is provided below the two extrusion shafts (12); the screw shaft (13) is installed in the guide groove (1202).

6. A processing method using a secondary molding apparatus based on recycled polyethylene granules according to any one of claims 1-5, characterized in that, Includes the following steps: S1. The injection molding machine injects raw materials into the ring sleeve (902), and after a period of time, it drives the rotary frame (2) and the ring-cutting tube (402) to rotate at a certain angle; S2, the liquid supply ring (14) supplies coolant to the liquid inlet (15) and completes the cooling of the area of ​​the arrangement hole (404); S3. Drive the pull rod (804) through the guide rail (103) so that the ring (902) extends out of the arrangement hole (404) and is squeezed and kneaded into shape by the kneading part (5); S4. After the plastic granules fall off, as the operation continues, the molded part (6) resets, the ring (902) re-enters the arrangement hole (404), and under the drive of the pull-out part (3), the release agent is applied to the inner wall of the ring (902) to complete one cycle operation.

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