Plastic recycling device and recycling method
By combining drying and sorting in a plastic recycling device, uniform drying and weight sorting are achieved using a moving enclosed plate and airflow field. This solves the problems of uneven drying and incomplete sorting in traditional methods, thereby improving the efficiency of plastic recycling and the quality of recycled plastics.
Patent Information
- Application Number
- CN202511728375.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2025-12-23
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In traditional plastic recycling processes, uneven drying and incomplete sorting lead to unstable quality of recycled plastics, and existing separation technologies are prone to material damage or blockage.
Design a plastic recycling device that combines drying and sorting. By moving between a closed plate and an inclined plate, it uses hot air and airflow to achieve uniform drying and sorts light and heavy materials by weight difference. It uses a movable rotating plate and an arc-shaped rubber strip to turn and guide the materials, avoiding dead corners and blockages.
It achieves efficient drying and sorting of plastics, ensuring full contact between hot air and materials, reducing physical damage, avoiding dead corners and blockages, and improving the quality and recycling efficiency of recycled plastics.
Smart Images
Figure CN121179596A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of recycling of plastics or other components in plastic-containing waste, and particularly relates to a plastic recycling and reusing device and a recycling method. BACKGROUND
[0002] In the field of plastic recycling and regeneration, the recycled materials are usually mixed with water, metal particles, rubber and other substances. These impurities can seriously affect the quality of the regenerated plastics. Traditional plastic particle drying usually uses hot air ovens or stirring drying equipment. The materials are in a relatively static or simple tumbling state. The hot air and the materials are not evenly contacted, which can easily cause dry dead angles, resulting in residual moisture in some materials and overheating degradation in some materials. This uneven drying can make the subsequent melting and regeneration process unstable, affecting the quality of the regenerated products.
[0003] In the sorting process, widely used technologies include hydrocyclone separation, centrifugal separation and vibrating screen separation based on density differences. Hydrocyclone separation consumes a large amount of water and produces wastewater, which can easily cause secondary pollution. Centrifugal separation can easily cause physical damage to brittle plastic particles, resulting in secondary debris. Vibrating screen separation relies on the mesh size of the screen, and high material humidity can easily cause screen clogging. SUMMARY
[0004] Therefore, the technical problem to be solved by the present application is to provide a plastic recycling and reusing device and a recycling method, which can combine drying and sorting processes to efficiently screen out plastics in recycled plastics and improve plastic recycling efficiency.
[0005] A light plastic recycling device, comprising two fixed shells, a recycling plate fixedly connected between the two fixed shells, two closure plates slidingly connected to the recycling plate, the two closure plates being symmetrically arranged, an inclined plate connected to each closure plate, and a top groove formed in the recycling plate.
[0006] The device further comprises a movable seat slidingly connected to the fixed shell, and two closure plates slidingly connected to the movable seat.
[0007] The device further comprises a bottom plate fixedly connected to the fixed shell, a plurality of mesh holes formed in the bottom plate, a plurality of rotating plates rotatably connected to the bottom plate, a connecting plate fixedly connected to each rotating plate, and a torsional spring fixedly connected between each connecting plate and the fixed shell.
[0008] Each bottom plate is provided with a matching groove, and a cylindrical rod is inserted into each matching groove. A transmission rod is fixedly connected between every two adjacent cylindrical rods.
[0009] The plastic recycling and reusing device is used for a recycling method of recycling plastics, which comprises the following steps:
[0010] Step one: add the pre-crushed and sieved plastic material through the door of the fixed shell, and temporarily store it in the space surrounded by the two sealing plates, the inclined plate and the bottom plate to provide a stable basis for subsequent operations;
[0011] Step two: start the air blower, and the hot air blows upward through the mesh holes of the bottom plate, making the material particles continue to fly, and removing moisture through heat exchange to prepare for sorting based on weight difference;
[0012] Step three: drive the moving seat to make the sealing plates slide synchronously, so that the material moves in a large range in the cavity, and the gradient air flow field is combined to ensure uniform contact of hot air and improve drying efficiency;
[0013] Step four: make the two sealing plates move away from each other to form a gap, and the light plastic particles are blown out from the top groove, and the heavy impurities are retained due to gravity, realizing efficient separation;
[0014] Step five: drive the scraping plate to scrape the sorted plastic particles into the collection box;
[0015] Step six: after completing the collection, turn off all power sources, clean the inside of the device and take out the product to prepare for the next recycling operation, ensuring the sustainable operation of the equipment.
[0016] The beneficial effects of the device are: the drying and sorting processes are combined, the plastic in the recycled plastic is efficiently screened out, the plastic recycling efficiency is improved, the full and uniform contact of hot air and material particles is ensured, the dead angle or uneven drying problem that may exist in traditional static or simple tumbling drying is effectively avoided, compared with traditional centrifugal separation, the physical damage to the material is smaller, especially beneficial to maintaining the integrity of brittle plastic particles, and no screen is needed, avoiding the problem of blockage. BRIEF DESCRIPTION OF DRAWINGS
[0017] The application will be further described in detail below in combination with the drawings and specific implementation methods.
[0018] Figure 1 and Figure 2 is a schematic view of the overall structure of a light plastic recycling device;
[0019] Figure 3 is a schematic view of the structure of the fixed shell;
[0020] Figure 4 is a schematic view of the structure of the bottom plate;
[0021] Figure 5 is a schematic view of the structure of the rotating plate;
[0022] Figure 6 is a schematic view of the structure of the inclined plate;
[0023] Figure 7This is a schematic diagram of the structure of the recycling plate;
[0024] Figure 8 This is a schematic diagram of the rotating rod structure;
[0025] Figure 9 This is a schematic diagram of the structure of an arc-shaped rubber strip;
[0026] Figure 10 This is a schematic diagram of the movable base. Detailed Implementation
[0027] A plastic recycling and reuse device includes a fixed shell 101, two fixed shells 101 are provided, a recycling plate 601 is fixedly connected between the two fixed shells 101, two closed plates 501 are slidably connected on the recycling plate 601, the two closed plates 501 are symmetrically arranged, each closed plate 501 is connected to an inclined plate 503, and a top groove 603 is provided on the recycling plate 601.
[0028] A blower with its own heat source is fixed to the lower side of the two fixed shells 101. In actual use, the two fixed shells 101 are all fixed with cover plates on the top, bottom, left and right sides, so that the fixed shells 101 form a closed container. The container has an openable door for adding materials. After the recycled materials are crushed and screened, they are added between the two closed plates 501. Then the blower is started, and the blower blows the material particles from bottom to top. During this process, the material particles will be naturally blown between the two closed plates 501 and the two inclined plates 503, so that the material particles will continue to fly. During the blowing of the material particles, the moisture in the material particles will be dried, so that the overall quality of the material is determined only by the material properties of the material itself, eliminating the negative impact of excessive sticky moisture on subsequent recycling and screening operations.
[0029] During the blowing drying process, two operable closed plates 501 interact synchronously on the fixed shell 101, causing the material particles to move over a wide range between the two fixed shells 101. This further facilitates the uniform contact between the material particles and the hot air, improving the drying effect. After drying for a period of time, the two operable closed plates 501 slide away from each other, creating a gap between them. This gap has a through space with the top groove 603. Due to their lighter weight, the plastic particles can be blown out of the top groove 603 smoothly, while heavy metal or rubber particles cannot fly out of the top groove 603 due to their heavier weight. The plastic particles that fly out of the top groove 603 can be collected, thus achieving the recycling and collection of plastic particles and completing an efficient drying and collection process.
[0030] By operating the two closed plates 501 to slide synchronously on the fixed shell 101, the device can actively change the airflow field and material flow state in the cavity. This design allows the material particles to move over a wide range between the two fixed shells 101, ensuring full and uniform contact between the hot air and the material particles, and effectively avoiding the dead corners or uneven drying problems that may exist in traditional static or simple tumbling drying.
[0031] Meanwhile, during the sorting stage, by controlling the two closed plates 501 to slide away from each other, a through space connected to the top groove 603 is formed. At this time, the dried lightweight plastic particles can be smoothly blown out of the top groove 603 and collected by the airflow, while heavy metal particles or rubber particles cannot be blown out due to gravity. This aerodynamic sorting method causes less physical damage to the material compared with traditional centrifugal separation, which is especially beneficial to maintaining the integrity of brittle plastic particles. Moreover, it eliminates the need for screens and avoids clogging problems.
[0032] It also includes a movable seat 801 that is slidably connected to the fixed housing 101. Two closed plates 501 are slidably connected to the movable seat 801. A first motor is fixedly connected to the fixed housing 101. A first lead screw is fixedly connected to the output shaft of the first motor. The first lead screw drives the lead screw of the movable seat 801.
[0033] By rotating the output shaft of the first motor, the first motor drives the lead screw to rotate, and the rotation of the lead screw in turn drives the moving seat 801 to slide, so that the two sealing plates 501 slide synchronously, thereby improving the drying efficiency. Subsequently, the two sealing plates 501 can be operated to slide on the sealing plate 501, so that a gap appears between the two sealing plates 501, which makes it easier for plastic particles to pass through the gap and fly out smoothly from the top groove 603, thus successfully completing the subsequent screening of plastic particles.
[0034] It also includes a base plate 301 fixed to the fixed shell 101. The base plate 301 has multiple mesh holes 304. Multiple rotating plates 302 are rotatably connected to the base plate 301. Each rotating plate 302 is fixed with a connecting piece 306. A torsion spring is fixed between the multiple connecting pieces 306 and the fixed shell 101. The multiple mesh holes 304 are evenly distributed in multiple rows on the base plate 301. The left and right sides of each row of mesh holes 304 are rotatably connected with rotating plates 302. That is, the multiple rotating plates 302 are divided into multiple groups from left to right. Each group of rotating plates 302 has two. The torsional force provided by the torsion springs between the multiple groups of rotating plates 302 and the fixed shell 101 gradually increases from left to right.
[0035] The lower sides of both inclined plates 503 can contact the bottom plate 301, and the material particles will be stored between the two closed plates 501, the two inclined plates 503 and the bottom plate 301, providing a stable guarantee for subsequent drying and collection operations.
[0036] A blower is connected to the underside of the base plate 301. The hot air blown out by the blower is transmitted upward through multiple rows of mesh 304, thereby achieving the effect of blowing and drying the material particles. Multiple sets of rotating plates 302 can guide the air blown out by multiple mesh 304. Since the torsion springs between the multiple sets of rotating plates 302 and the fixed shell 101 can provide different torsional forces, the opening and closing degree between each set of rotating plates 302 is different, resulting in different guiding effects on the air. That is, the opening and closing angle between the multiple sets of rotating plates 302 gradually decreases from left to right. During the synchronous sliding of the two closed plates 501, the material particles will be moved to the upper side of the multiple rows of mesh 304 in different ranges. This allows the air blowing on the material particles to change with the synchronous movement of the two closed plates 501. This design makes the airflow field in the cavity no longer uniform and constant, but forms an organized airflow area with varying intensities. When the sealing plate 501 slides and drives the material particles through these different airflow areas, the material can experience blowing at different degrees and angles, ensuring that the hot air contacts without dead corners, greatly improving the uniformity and thoroughness of drying, making the flying effect of material particles between the two sealing plates 501 more comprehensive, and further improving the drying effect on the material.
[0037] The rotating plate 302 is not fixed but can rotate under the influence of airflow and material. This dynamic characteristic makes the air duct on the base plate 301 an adaptive system. In areas with thicker material accumulation, the rotating plate 302 may be slightly compressed, changing the local airflow direction and helping to "blow away" material clumps; in areas with less material, it maintains a larger opening to ensure basic airflow. This intelligent adjustment capability allows the airflow distribution to be finely adjusted according to the real-time state of the material. Compared with the fixed air duct or simple mesh design of traditional centrifugal devices, it has higher fluid dynamic efficiency and more efficient energy utilization.
[0038] In traditional centrifugal equipment, the screen or fixed air vents are prone to clogging when processing wet materials due to material adhesion. In this design, the rotating plate 302 above the mesh 304 is itself in a movable state, and the movement of airflow and materials helps to prevent fine particles from directly adhering to or clogging the mesh.
[0039] The base plate 301, together with the two inclined plates 503 and the two enclosed plates 501, forms a stable temporary storage space, providing a reliable bearing surface for the "flying" of material particles. More importantly, the rotating plate 302 guides the airflow through the mesh 304, transforming the airflow, which might otherwise be vertically upward, into a more impactful airflow, thereby penetrating the material layer more effectively and improving the flying effect of material particles, creating ideal conditions for further efficient sorting.
[0040] Each base plate 301 has a mating groove 305, and a cylindrical rod is inserted into each mating groove 305. A transmission rod 303 is fixedly connected between the two cylindrical rods of each set of rotating plates 302.
[0041] By using the groove 305, the round rod, and the transmission rod 303, when the two closed plates 501 move and come into contact with the rotating plate 302, the two rotating plates 302 in each group can synchronously engage and rotate under the transmission of the transmission rod 303. This facilitates the smooth movement of the inclined plate 503 past the position of the rotating plate 302 and avoids interference between the inclined plate 503 and the rotating plate 302, which would affect the normal operation of the equipment.
[0042] A rubber layer 502 is fixedly attached to each of the closed plates 501, and an arc plate 504 is fixedly attached to the lower side of each of the inclined plates 503.
[0043] During the movement of the two closed plates 501, the arc plates 504 on the two closed plates 501 will disengage from multiple rotating plates 302, thereby providing driving force for the rotating plates 302, enabling multiple sets of rotating plates 302 to smoothly engage with each other, so that when the two closed plates 501 move synchronously, they can smoothly pass through the positions of multiple rotating plates 302, complete the automatic position adjustment function, and facilitate the movement of material particles to the upper side of the multi-row mesh 304 in different ranges, ensuring the smooth progress of the drying work.
[0044] It also includes two electric push rods 802 fixedly connected to the movable seat 801, and the telescopic rods of the two electric push rods 802 are respectively fixedly connected to the two closed plates 501.
[0045] The telescopic rods of the two electric push rods 802 are extended, thereby moving the two closed plates 501 away from each other, thus creating a gap between the two closed plates 501. This allows the plastic particles to pass smoothly through the gap and fly upwards, completing the screening operation of the lightweight plastic particles.
[0046] It also includes a fixed seat 703 fixed to the rear fixed housing 101, a rotating rod 701 rotatably connected to the fixed seat 703, a plurality of arc-shaped rubber strips 702 fixed to the rotating rod 701, a drive motor 704 fixed to the fixed seat 703, and the output shaft of the drive motor 704 fixed to the rotating rod 701.
[0047] During equipment operation, the output shaft of the continuously operated drive motor 704 can rotate, causing the rotating rod 701 to rotate on the fixed seat 703. This, in turn, causes the rotating rod 701 to drive multiple arc-shaped rubber strips 702 to rotate. The multiple rotating arc-shaped rubber strips 702 can disturb the material particles between the two closed plates 501, allowing the material particles to tumble over a wider range during the air-blowing process. This allows the material particles to come into contact with the hot air more comprehensively and quickly, improving the overall drying efficiency.
[0048] The drive motor 704 continuously rotates multiple arc-shaped rubber strips 702 on the rotating rod 701, actively and gently agitating the material particles between the two closed plates 501. This effectively breaks up material clumps that may be stuck together due to moisture, allowing the material particles to "turn over" more fully in the airflow and ensuring more comprehensive contact with hot air. Compared to the rigid impact or friction that may exist in traditional centrifugal drying, the flexibility of the arc-shaped rubber strips significantly reduces mechanical damage to plastic particles, better maintains the physical integrity of the material, and is beneficial for subsequent high-quality recycling.
[0049] The rotational motion of the arc-shaped rubber strip 702 works in conjunction with the sliding closed plate 501 and the rotating plate 302 with gradient wind resistance on the bottom plate 301 to form a complex and constantly changing three-dimensional motion field in the drying chamber. This composite motion ensures that material particles will not accumulate in a corner to form a dead corner, but will be continuously thrown up, dispersed and mixed, thereby significantly improving the thermal energy utilization efficiency and drying uniformity.
[0050] For some thermoplastic plastic granules, when left to stand still for a long time in a hot air environment or when the flow is insufficient, the surface may soften and stick together. The continuous agitation of the arc-shaped rubber strip 702 can promptly separate the softened granules that are about to come into contact with it, effectively preventing the material from clumping or adhering to the inner wall of the drying chamber during the drying process.
[0051] The rotating rod 701 has multiple slots, and multiple arc-shaped rubber strips 702 are fixedly connected in the multiple slots. The multiple arc-shaped rubber strips 702 are distributed in multiple rows in a circumferential shape on the rotating rod 701.
[0052] This design not only ensures uniform agitation of material particles, but also allows the two sealing plates 501 to smoothly press and deform multiple arc-shaped rubber strips 702 during sliding, thereby causing the multiple arc-shaped rubber strips 702 to retract into the grooves on the rotating rod 701. This facilitates the smooth passage of the sealing plates 501 through the positions of the multiple arc-shaped rubber strips 702, further ensuring the long-term stable operation of the equipment.
[0053] The arc-shaped rubber strips 702 are distributed in multiple rows on the rotating rod 701. When the rotating rod rotates, the rubber strips can tumble the material layer in three-dimensional space in a three-dimensional manner without dead angles, ensuring that the hot air and the material are in more sufficient contact. At the same time, its flexible design can effectively avoid the cutting, breaking or excessive wear of plastic particles that may be caused by rigid stirring parts such as metal blades under high-speed rotation. In addition, this avoidance mechanism fundamentally prevents jamming, collision or structural damage caused by accidental contact between rigid moving parts and rigid stirring parts, which significantly improves the stability and reliability of the equipment in long-term operation.
[0054] It also includes a scraper 604 that is slidably connected to the fixed housing 101, a collection box 602 that is fixedly connected to the recycling plate 601, the scraper 604 that can contact the upper surface of the recycling plate 601, a second motor that is fixedly connected to the fixed housing 101, a second lead screw that is fixedly connected to the output shaft of the second motor, and the second lead screw that is threadedly connected to the scraper 604.
[0055] After creating a gap between the two closed plates 501 and continuously blowing for a period of time, allowing a significant amount of plastic particles to accumulate on the fixed upper plate between the two fixed shells 101, the scraper 604 can be operated to slide from right to left. During this process, the scraper 604 will push the accumulated plastic particles, gradually pushing them to the left until they are completely pushed to the position separated from the top groove 603. Continuing to slide the scraper 604 will allow it to continuously scrape and transport the plastic particles, thereby scraping them into the collection box 602 for storage, thus completing the scraping and collection effect of the plastic particles and achieving the plastic recycling function.
[0056] Furthermore, two collection boxes 602 can be symmetrically arranged on the recycling plate 601. During the reciprocating sliding of the scraper plate 604, the plastic particles can be sent into the two collection boxes 602 for storage, avoiding the situation where some plastic particles cannot be collected in time when the scraper plate 604 slides back to reset when only one side of the collection box 602 is set.
[0057] The aforementioned plastic recycling device is used for a method of recycling plastics, which includes the following steps:
[0058] Step 1: The pre-crushed and screened plastic material is added through the door of the fixed shell 101 and temporarily stored in the space enclosed by the two closed plates 501, the inclined plate 503 and the bottom plate 301, providing a stable foundation for subsequent operations.
[0059] Step 2: Start the blower. The hot air flows upward through the mesh 304 of the bottom plate 301, causing the material particles to fly continuously. Moisture is removed through heat exchange, preparing for sorting based on weight difference.
[0060] Step 3: Drive the moving seat 801 to drive the closing plate 501 to slide synchronously, so that the material moves in a large range within the cavity. Combined with the gradient airflow field, this ensures uniform hot air contact and improves drying efficiency.
[0061] Step 4: Move the two closed plates 501 away from each other to form a gap. Lightweight plastic particles are blown out from the top groove 603, while heavy impurities are retained due to gravity, achieving efficient separation.
[0062] Step 5: Drive the scraper 604 to scrape the sorted and accumulated plastic particles into the collection box 602;
[0063] Step Six: After collection is complete, turn off all power sources, clean the inside of the device and remove the product to prepare for the next round of recycling operations and ensure the equipment can operate continuously.
Claims
1. A plastic recycling and reuse device, characterized in that, It includes a fixed shell, of which there are two, and a recycling plate is fixedly connected between the two fixed shells. Two closed plates are slidably connected to the recycling plate. The two closed plates are symmetrically arranged, and each closed plate is connected to an inclined plate. A top groove is opened on the recycling plate.
2. The plastic recycling and reuse device according to claim 1, characterized in that, It also includes a movable seat that is slidably connected to the fixed shell, and two closed plates are slidably connected to the movable seat.
3. The plastic recycling and reuse device according to claim 2, characterized in that, It also includes a base plate fixed to the fixed shell, with mesh openings on the base plate, and multiple rotating plates rotatably connected to the base plate. Each rotating plate is fixed with a connecting piece, and multiple connecting pieces are fixed with torsion springs between themselves and the fixed shell.
4. The plastic recycling and reuse device according to claim 3, characterized in that, Each base plate has a mating groove, and a cylindrical rod is inserted into each mating groove. A transmission rod is fixed between every two adjacent cylindrical rods.
5. A plastic recycling and reuse device according to claim 4, characterized in that, Each of the aforementioned closed plates is fixedly fitted with a rubber layer, and each of the aforementioned inclined plates is fixedly fitted with an arc plate on its underside.
6. A plastic recycling and reuse device according to claim 5, characterized in that, It also includes two electric push rods fixed to the movable base, and the telescopic rods of the two electric push rods are fixed to the two closed plates respectively.
7. A plastic recycling and reuse device according to claim 5, characterized in that, It also includes a mounting base fixed to the rear fixed shell, a rotating rod rotatably connected to the mounting base, and multiple arc-shaped rubber strips fixed to the rotating rod.
8. A plastic recycling and reuse device according to claim 7, characterized in that, Multiple arc-shaped rubber strips are arranged in multiple rows in a circular pattern on the rotating rod.
9. A plastic recycling and reuse device according to claim 8, characterized in that, It also includes a scraper that is slidably connected to the fixed shell, and a collection box is fixedly attached to the recycling plate, and the scraper can contact the upper surface of the recycling plate.
10. A plastic recycling device according to claim 9 for recycling plastics, characterized in that, The method includes the following steps: Step 1: Add the pre-crushed and screened plastic material through the door of the fixed shell, and temporarily store it in the space enclosed by two closed plates, an inclined plate and a bottom plate, providing a stable foundation for subsequent operations; Step 2: Start the blower. The hot air flows upward through the mesh of the bottom plate, causing the material particles to fly continuously. Moisture is removed through heat exchange, preparing for sorting based on weight difference. Step 3: Drive the moving seat to move the closed plate synchronously, so that the material moves over a large range in the cavity. Combined with the gradient airflow field, this ensures uniform hot air contact and improves drying efficiency. Step 4: Move the two closed plates apart to form a gap. Lightweight plastic particles are blown out from the top groove, while heavy impurities are retained due to gravity, achieving efficient separation. Step 5: Drive the scraper to scrape the sorted plastic particles into the collection box; Step Six: After collection is complete, turn off all power sources, clean the inside of the device and remove the product to prepare for the next round of recycling operations and ensure the equipment can operate continuously.