Plastic packaging bag processing waste recycling equipment

Abstract

The application belongs to the technical field of packaging bag recycling, in particular to a plastic packaging bag processing waste recycling equipment; the equipment comprises a plastic recycling extruder; a feeding mechanism is installed at the feeding port of the plastic recycling extruder; the feeding mechanism comprises a mounting table; a through slot is formed in the middle of the table top; a vertical cylinder is fixed at the top of the through slot; an inlet is formed at the bottom of the vertical cylinder; a first electric push rod is installed at the top of the vertical cylinder; a pressure disc is slidably arranged in the vertical cylinder; a mesh cylinder is fixed at the top of the pressure disc; a plurality of first pipe extractors are installed at the top of the vertical cylinder; a dehumidifying assembly is arranged on the mounting table; a swivel is arranged at the bottom of the mounting table; recessed plates are arranged on both sides of the swivel; the swivel rotates in the recessed plates; circular grooves are uniformly arranged on the outer ring surface of the swivel; a loosening assembly is arranged below the swivel; the feeding mechanism can effectively prevent air holes and pinholes caused by air and water vapor residues in the molten melt.

Description

Technical Field

[0001] This invention belongs to the field of packaging bag recycling technology, specifically a recycling device for waste materials from plastic packaging bag processing. Background Technology

[0002] With the rapid development of the plastics industry, plastic bags and packaging bags have been widely used in food packaging, retail, logistics, and other fields, greatly facilitating production and daily life. However, they have also brought serious environmental problems. These plastic products are mostly made of thermoplastic materials such as polyethylene and polypropylene, with natural degradation cycles of decades or even centuries. Large quantities of discarded plastic packaging bags entering the environment cause white pollution and disrupt the ecological balance. Against this backdrop, the recycling and reuse of plastic packaging bags has become a key approach to solving white pollution and achieving resource recycling.

[0003] The recycling and regeneration of plastic packaging bags is a systematic process, with core steps including source collection, sorting and purification, crushing and washing, extrusion granulation and end-use applications. First, the packaging bags are collected and sorted. The sorted plastic packaging bags are crushed by crushing equipment, and then subjected to a combination of room temperature coarse washing, high temperature and high pressure fine washing, and rinsing to remove surface contaminants such as oil, food residue, and dirt. The washed fragments are then centrifuged for dehydration and hot air drying to remove moisture, completing the pretreatment stage. The pretreated plastic fragments need to be granulated by an extruder to be converted into standardized recycled plastic granules before they can be reused in the production of plastic products. This process is the core link of recycling and regeneration. The specific process is as follows: the dried plastic fragments are fed into the extruder hopper by the feeding device, preheated in the feeding section, and conveyed to the compression section. Through the dual action of screw shearing and barrel heating, the plastic fragments gradually change from a solid state to a molten state. The molten plastic enters the metering section for further mixing and homogenization, and then is extruded by the die head to form continuous plastic filaments. After the filaments are quickly solidified and shaped in the cooling water tank, they are conveyed by the traction machine to the pelletizer to be cut into recycled granules. Finally, after screening and drying, the finished recycled granules are obtained.

[0004] However, because the pre-treated plastic fragments are in a loose state, they easily trap a large amount of air during feeding and conveying. This trapped air enters the extruder along with the plastic fragments. Simultaneously, despite dehydration and drying, trace amounts of moisture remain in the wrinkles and gaps of the plastic fragments. This residual moisture rapidly vaporizes into water vapor in the melting section of the extruder. Existing extruders have limited venting capacity, making it difficult to completely remove the trapped air and vaporized water vapor. The unexpelled gas and water vapor mix in the molten melt, undergoing extrusion, cooling, and pelletizing along with the melt, ultimately forming pores and pinholes inside or on the surface of the recycled granules. These defective recycled granules exhibit significantly reduced mechanical properties; key indicators such as tensile strength and elongation at break fail to meet the production requirements of mid-to-high-end plastic products. They can only be used in low-value-added building material fillers and other fields, severely limiting the resource utilization efficiency and economic value of recycling plastic packaging bags. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the above-mentioned technical problems, this invention proposes a recycling device for waste materials from plastic packaging bag processing. By setting up a feeding mechanism, it can effectively prevent the formation of air holes and pinholes in the molten material due to residual air and water vapor. The specific structure is as follows. A plastic packaging bag processing waste recycling device includes a plastic recycling extruder, which is mounted on a table; a die head is installed at the outlet of the plastic recycling extruder. The plastic recycling extruder is equipped with a feeding mechanism at its inlet; the feeding mechanism includes a mounting platform, which is mounted on the platform via support legs. A through groove is provided in the middle of the tabletop; a vertical cylinder is fixed to the top of the through groove, and the top of the vertical cylinder is closed; an inlet is provided at the bottom of the vertical cylinder. A first electric actuator is installed at the top of the vertical cylinder; a pressure plate slides inside the vertical cylinder and is fixedly connected to the extension rod of the first electric actuator; the pressure plate has evenly arranged air holes, and each air hole is equipped with a one-way valve; a mesh cylinder is fixed at the top of the pressure plate and fits against the inner surface of the vertical cylinder. The top of the vertical cylinder is equipped with multiple first suction pipes, and the first suction pipes are connected to an external vacuum cleaner; The mounting platform is equipped with a dehumidification component, and the vertical cylinder passes through the dehumidification component; The mounting platform has a rotating ring at its bottom; both sides of the rotating ring have concave plates, and the concave plates are fixed to the bottom of the mounting platform; the rotating ring rotates within the concave plates. Two rings are fixed on the outer surface of the rotating ring; the inner ring of the concave plate and the bottom of the mounting platform are both provided with arc-shaped grooves, and the rings rotate within the arc-shaped grooves; The outer ring surface of the rotating ring is provided with evenly arranged circular grooves, and the uppermost circular groove is initially opposite to the through groove, and the concave plate is located on both sides of the uppermost circular groove. One of the rings has evenly arranged toothed grooves on its outer side; a gear rotates inside the concave plate and meshes with the toothed grooves; the gear is driven by a first motor. A loosening component is provided below the rotating ring, and the loosening component is connected to the feed port of the plastic recycling extruder.

[0006] In a preferred embodiment of the present invention, the dehumidification assembly includes a rectangular chamber; a cover is fixed to the top of the rectangular chamber; The cover has a through hole, and the vertical cylinder passes through the through hole and is slidably connected to the through hole; the rectangular compartment is mounted on the mounting platform. The rectangular compartment is equipped with a spiral plate, which is fixed to the cover; the vertical cylinder passes through the inner circle of the spiral plate, and the inlet on the vertical cylinder is connected to the end of the inner circle of the spiral plate. A guide bin is fixed at the starting end of the outer ring of the spiral plate, and the guide bin is connected to the starting end of the outer ring of the spiral plate; an inclined plate is fixed inside the guide bin; a spray pipe is fixed on the inclined plate; The feed hopper is connected to a first air pipe, which extends to the inside of the inclined plate and extends to the outside on the other side. The top of the feed hopper is fixed with a feed hopper, which is installed on the top of the cover.

[0007] In a preferred embodiment of the present invention, a first conduit is uniformly arranged within the spiral gap of the spiral plate, and the first conduit is located at the top of the spiral plate. The spiral plate has a uniformly arranged second conduit within its spiral gap, and the second conduit is located at the bottom of the spiral plate; the second conduit is staggered with the first conduit. The first conduit has evenly arranged first air grooves, and the first air grooves are inclined toward the lower second air tube; the second conduit has evenly arranged second air grooves, and the second air grooves are inclined toward the upper first air tube. Both the first and second conduits are connected to the internal space of the rectangular chamber; the outer ring of the rectangular chamber is fixed with uniformly arranged second air pipes.

[0008] In a preferred embodiment of the present invention, a compartment door is installed on the top of the cover, and the compartment door is a transparent acrylic sheet.

[0009] In a preferred embodiment of the present invention, each of the circular grooves is provided with a circular plate; Two sets of through pipes are installed on the circular plate, with one side of the through pipe extending to the surface of the circular plate and fixed inside the circular plate, and the other side passing through the rotating ring and extending to the inner ring of the rotating ring, and slidingly connected to the rotating ring; a one-way valve is installed on the side of the through pipe extending into the circular plate. The rotating ring has rotating plates on both sides; fixed plates are fixed on both sides of the two rotating plates; two horizontal plates are fixed on the fixed plates, and the other side of the horizontal plates is fixed to the concave plate. A second suction tube is installed on the horizontal plate located on the right side, and the second suction tube is connected to the inner ring of the rotating ring.

[0010] In a preferred embodiment of the present invention, each of the circular plates has a base plate fixed to one side of the through-tube extending to the inner ring of the rotating ring, and the through-tube passes through the base plate and is flush with the surface of the base plate; a spring is connected to the base plate, and the other side of the spring is connected to the inner ring of the rotating ring. A second electric actuator is mounted on the rotating plate located on the left side, and the extension rod of the second electric actuator extends into the inside of the rotating ring; a wedge is fixed on the extension rod of the second electric actuator.

[0011] In a preferred embodiment of the present invention, a rectangular groove is formed on the surface of the circular plate, and the two sides of the rectangular groove are designed with rounded corners on the arc surface of the circular plate. The rectangular groove is provided with two top plates; the two top plates on opposite sides are rotatable within the rectangular groove via a rotating shaft. The two top plates have a sliding groove on the inner ring of the circular groove on opposite sides, and the sliding groove extends to the circular rings on both sides but does not penetrate the circular rings; The top plate extends into the circular groove; a stop bar is fixed to one side of the top plate that extends into the circular groove.

[0012] In a preferred embodiment of the present invention, the loose component includes a processing chamber, and the top of the processing chamber is fixed to the bottom of the concave plate; The bottom of the processing chamber is fixed to the plastic recycling extruder, and the feed port of the plastic recycling extruder is located inside the processing chamber; The processing chamber contains a rotating roller, which is driven by a second motor, and the second motor is mounted on the processing chamber. The roller is provided with a vertical plate, which intersects with the ring; a scraper is fixed on the vertical plate and is located between the two rings.

[0013] In a preferred embodiment of the present invention, a slide rail is provided inside the rotating roller, and the upright plate slides within the slide rail; The slide is equipped with a spring, which is fixed to the upright plate. In the initial state, the upright plate slides out of the slide under the action of the spring.

[0014] The beneficial effects of this invention are as follows: 1. The plastic packaging bag processing waste recycling equipment of the present invention first performs secondary drying and dehumidification treatment on the plastic fragments before they enter the extruder. This effectively removes trace amounts of residual moisture from the folds and gaps of the fragments, significantly reducing the amount of water vapor generated by moisture vaporization in the subsequent molten section of the extruder, thus reducing the source of water vapor in the melt from the root. Subsequently, the dehumidified plastic fragments enter the vertical cylinder, where the pressure plate is driven to move up and down in a circular motion by the first electric push rod, forcibly compacting the loose plastic fragments. During this process, a large amount of air trapped inside the fragments is continuously squeezed out. In conjunction with the first suction pipe connected to the vacuum cleaner at the top of the vertical cylinder, the air collected above the pressure plate can be continuously extracted, achieving thorough removal of air from the plastic fragments. After the dual treatment of dehumidification and compaction and degassing, the moisture and air content of the plastic fragments entering the extruder is reduced to a lower level, which can effectively prevent the formation of pores and pinholes in the molten melt due to residual air and water vapor.

[0015] 2. The plastic packaging bag processing waste recycling equipment of the present invention, when plastic fragments enter the guide hopper through the feeding hopper, hot air is sprayed out from the nozzles on the inclined plate to initially blow and dry the falling fragments. At the same time, the airflow impact force breaks up the clumps of fragments to avoid uneven drying caused by clumping. Subsequently, the fragments are carried by the hot air into the spiral gap of the spiral plate and move along the spiral path, thereby extending the drying time. At the same time, the first and second guide pipes arranged in the spiral gap spray hot air through the inclined first and second air grooves, respectively pushing the plastic fragments downward and upward to float, so that the fragments move along the spiral. The reciprocating motion within the gap breaks up the accumulation of fragments, allowing the surface and folds of the plastic fragments to come into contact with hot air, further reducing the moisture content in the plastic fragments. Compared to traditional hot air drying, which only acts on the surface of the fragments, this dehumidification component achieves dynamic flipping of the fragments through airflow disturbance, resulting in more uniform and thorough drying. This significantly reduces the moisture content of the plastic fragments before they enter the vertical cylinder, fundamentally reducing the amount of water vapor generated by moisture vaporization in the subsequent extruder melting section. This, combined with the subsequent compaction and degassing process of the vertical cylinder, provides dual protection, further enhancing the effect of eliminating porosity and pinhole defects in recycled particles.

[0016] 3. The plastic packaging bag processing waste recycling equipment of the present invention, when the plastic fragments in the circular trough are pushed into the processing chamber, the second motor drives the rotating roller to drive the scraper to rotate continuously. The scraper precisely acts on the bottom of the plastic fragments, and decomposes the whole plastic fragments into loose plastic fragments by scraping layer by layer. This avoids the situation where large compacted materials directly enter the extruder and cause insufficient local plasticization or local overheating and degradation due to poor internal heat transfer. The loosened plastic fragments are uniform in size and have a more sufficient contact area with the extruder screw. They can evenly absorb the heat generated by screw shearing and barrel heating, ensuring the consistency of the subsequent melting and plasticizing process. This further ensures the mechanical property stability of the recycled granules and provides key support for improving the quality of recycled granules. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the plastic recycling extruder of the present invention; Figure 2 This is an internal structural diagram of the dehumidification component in this invention; Figure 3 This is a structural diagram of the rotating ring, concave plate, and loose assembly in this invention; Figure 4 This is the present invention. Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 This is a top view of the plastic recycling extruder of the present invention; Figure 6 This is the present invention. Figure 5 Sectional view at point BB; Figure 7 This is the present invention. Figure 6 Enlarged view of a section at point C; Figure 8 This is the present invention. Figure 6 Enlarged view of a section at point D; Figure 9 This is the present invention. Figure 5 Sectional view at EE; Figure 10 This is the present invention. Figure 9 Enlarged view of a section at point F in the middle; Figure 11 This is the present invention. Figure 9 Enlarged view of a section at point G in the middle; Figure 12 This is the present invention. Figure 5 Cross-sectional view of the dehumidification unit at point HH; Figure 13 This is the present invention. Figure 12 Enlarged view of section I in the middle.

[0019] In the diagram: 1. Plastic recycling extruder; 11. Mounting platform; 12. Through channel; 13. Vertical cylinder; 14. Inlet; 15. First electric actuator; 16. Pressure plate; 17. Air hole; 18. Screen cylinder; 19. First extraction pipe; 2. Rotary ring; 21. Concave plate; 22. Circular ring; 23. Arc groove; 24. Circular groove; 25. Gear groove; 26. Gear; 3. Rectangular bin; 31. Cover; 32. Spiral plate; 33. Feed guide bin; 34. Inclined plate; 35. Nozzle; 36. First 37. Air pipe; 38. Feed hopper; 39. First conduit; 30. First air trough; 31. Second conduit; 32. Second air trough; 33. Second air pipe; 4. Circular plate; 44. Through pipe; 45. Rotating plate; 46. Fixed plate; 47. Second extraction pipe; 48. Bottom plate; 59. Second electric push rod; 60. Inclined block; 51. Top plate; 52. Slide groove; 63. Push rod; 64. Processing bin; 65. Rotating roller; 66. Vertical plate; 67. Scraper; 68. Slide rail. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 13 As shown, the plastic packaging bag processing waste recycling equipment of the present invention, as an embodiment of the present invention, includes a plastic recycling extruder 1, which is installed on a table; a die head is installed at the outlet of the plastic recycling extruder 1. The plastic recycling extruder 1 is equipped with a feeding mechanism at its inlet; the feeding mechanism includes a mounting platform 11, and the mounting platform 11 is mounted on the platform via support legs; A through groove 12 is provided in the middle of the tabletop; a vertical cylinder 13 is fixed to the top of the through groove 12, and the top of the vertical cylinder 13 is closed; an inlet 14 is provided at the bottom of the vertical cylinder 13. A first electric actuator 15 is installed on the top of the vertical cylinder 13; a pressure plate 16 slides inside the vertical cylinder 13, and the pressure plate 16 is fixedly connected to the extension rod of the first electric actuator 15; the pressure plate 16 has evenly arranged air holes 17, and each air hole 17 is equipped with a one-way valve; a mesh cylinder 18 is fixed on the top of the pressure plate 16, and the mesh cylinder 18 is in contact with the inner ring surface of the vertical cylinder 13. The top of the vertical cylinder 13 is equipped with a plurality of first suction pipes 19, and the first suction pipes 19 are connected to an external vacuum cleaner. The mounting platform 11 is equipped with a dehumidification component, and the vertical cylinder 13 passes through the dehumidification component; The mounting platform 11 has a rotating ring 2 at its bottom; both sides of the rotating ring 2 have concave plates 21, and the concave plates 21 are fixed to the bottom of the mounting platform 11; the rotating ring 2 rotates within the concave plates 21. Two circular rings 22 are fixed on the outer ring surface of the rotating ring 2; the inner ring of the concave plate 21 and the bottom of the mounting platform 11 are both provided with arc-shaped grooves 23, and the circular rings 22 rotate within the arc-shaped grooves 23; The outer ring 2 has evenly arranged circular grooves 24, and the uppermost circular groove 24 is initially opposite to the through groove 12, and the concave plate 21 is located on both sides of the uppermost circular groove 24. One of the rings 22 has evenly arranged toothed grooves 25 on its outer side; a gear 26 rotates inside the concave plate 21 and meshes with the toothed grooves 25; the gear 26 is driven by a first motor. A loosening component is provided below the rotating ring 2, and the loosening component is connected to the feed port of the plastic recycling extruder 1.

[0022] During the granulation of plastic fragments, the fragments are first introduced into a dehumidification unit, where they undergo further drying. After passing through the dehumidification unit, the fragments enter the vertical cylinder 13 through inlet 14 and are positioned below the pressure plate 16. Simultaneously, the first electric push rod 15 is controlled to extend and retract cyclically. The extended electric push rod 15 pushes the pressure plate 16 downward, which in turn causes the mesh cylinder 18 to move downward along the vertical cylinder 13. The descending mesh cylinder 18 gradually blocks the inlet 14, while the pressure plate 16 pushes... The plastic fragments below the pressure plate 16 move downwards, first being pressed into the through groove 12, and then into the circular groove 24 opposite to the through groove 12. Once the plastic fragments are pressed into the circular groove 24, the inlet 14 on the vertical cylinder 13 is completely blocked by the mesh cylinder 18. Simultaneously, the plastic fragments below the pressure plate 16 are gradually compressed within the circular groove 24. During this compression process, the plastic fragments are gradually compacted, and the gas inside the plastic fragments is gradually expelled. The expelled gas passes through the air holes 1 on the pressure plate 16. 7 flows to the top of the pressure plate 16. Because the vent 17 is equipped with a one-way valve, gas is prevented from re-entering the area below the pressure plate 16 through the vent 17. After the plastic fragments entering the circular groove 24 are compacted, the first electric actuator 15 retracts, causing the pressure plate 16 to move upwards. When the pressure plate 16 moves into the through groove 12, the first motor drives the gear 26 to rotate. Because the gear 26 meshes with the toothed groove 25 on the outer ring of the rotating ring 2, it causes the rotating ring 2 to rotate within the concave plate 21. Simultaneously, the rotating ring 2 drives the circular ring 22 along the inner ring of the concave plate 21 and the mounting platform 1. The arc-shaped groove 23 at the bottom rotates, and the squeezed plastic fragments will gradually rotate with the circular groove 24. When the next circular groove 24 moves to the bottom of the through groove 12, the first motor is controlled to stop rotating. At this time, the pressure plate 16 drives the mesh cylinder 18 to return to the initial state and no longer blocks the inlet 14. The plastic fragments will re-enter the vertical cylinder 13. At the same time, the first suction pipe 19 above the vertical cylinder 13 is connected to the external vacuum cleaner, so that the gas entering the vertical cylinder 13 can be continuously extracted. Then the squeezing operation of the plastic fragments can continue. Specifically, as the pressure plate 16 moves up and down in a cycle, it can squeeze the plastic fragments entering the vertical cylinder 13 in sequence and squeeze the plastic fragments into the circular groove 24. Then, it rotates with the rotating ring 2. During this process, the gas in the plastic fragments can be squeezed out. At the same time, since the plastic fragments first pass through the dehumidification component, the plastic fragments can be dehumidified again, thereby further reducing the moisture content in the plastic fragments. When the rotating ring 2 drives the circular groove 24 and the plastic fragments in the circular groove 24 to the bottom, the plastic fragments in the circular groove 24 will fall into the loosening component. After passing through the loosening component, they will enter the plastic recycling extruder 1 and be extruded into plastic filaments by the plastic recycling extruder 1. After the plastic filaments are quickly cooled and shaped by cooling water, they are cut into recycled pellets by the pelletizer. More specifically, before the plastic fragments enter the extruder, they undergo a secondary drying and dehumidification process using a dehumidification component. This effectively removes trace amounts of moisture remaining in the folds and gaps of the fragments, significantly reducing the amount of water vapor generated by moisture vaporization in the subsequent molten section of the extruder. This fundamentally reduces the source of water vapor in the melt. Subsequently, the dehumidified plastic fragments enter the vertical cylinder 13, where the pressure plate 16 is driven to move up and down cyclically by the first electric push rod 15, forcibly compacting the loose plastic fragments. During this process, a large amount of air trapped inside the fragments is continuously squeezed out. In conjunction with the first suction pipe 19 connected to the vacuum cleaner at the top of the vertical cylinder 13, the air collected above the pressure plate 16 can be continuously extracted, achieving thorough removal of air from the plastic fragments. After undergoing both dehumidification and compaction degassing, the moisture and air content of the plastic fragments entering the extruder is reduced to a lower level, effectively preventing the formation of pores 17 and pinholes in the molten melt due to residual air and water vapor.

[0023] As one embodiment of the present invention; the dehumidification component includes a rectangular chamber 3; a cover 31 is fixed to the top of the rectangular chamber 3; The cover 31 has a through hole, and the vertical cylinder 13 passes through the through hole and is slidably connected to the through hole; the rectangular compartment 3 is installed on the mounting platform 11; The rectangular compartment 3 is equipped with a spiral plate 32, which is fixed to the cover 31; the vertical cylinder 13 passes through the inner circle of the spiral plate 32, and the inlet 14 on the vertical cylinder 13 is connected to the end of the inner circle of the spiral plate 32. The outer ring of the spiral plate 32 is fixed with a guide bin 33, and the guide bin 33 is connected to the outer ring of the spiral plate 32; an inclined plate 34 is fixed inside the guide bin 33; a spray pipe 35 is fixed on the inclined plate 34. The feed hopper 33 is connected to a first air pipe 36, which extends to the inside of the inclined plate 34, and the other side of the first air pipe 36 extends to the outside. The top of the feed hopper 33 is fixed with a feed hopper 37, and the feed hopper 37 is installed on the top of the cover 31; In this embodiment, a first conduit 38 is uniformly arranged within the spiral gap of the spiral plate 32, and the first conduit 38 is located at the top of the spiral plate 32. The spiral plate 32 has a spiral gap in which a second conduit 39 is uniformly arranged, and the second conduit 39 is located at the bottom of the spiral plate 32; the second conduit 39 and the first conduit 38 are arranged alternately. The first conduit 38 has evenly arranged first air grooves 381, and the first air grooves 381 are inclined toward the lower second air pipe 392; the second conduit 39 has evenly arranged second air grooves 391, and the second air grooves 391 are inclined toward the upper first air pipe 36. The first conduit 38 and the second conduit 39 are both connected to the internal space of the rectangular chamber 3; the outer ring of the rectangular chamber 3 is fixed with uniformly arranged second air tubes 392. In this embodiment, a compartment door is installed on the top of the cover 31, and the compartment door is a transparent acrylic sheet.

[0024] When dehumidifying plastic fragments, the first air pipe 36 is connected to an external air source, and hot air is introduced into the inside of the inclined plate 34. After the hot air enters the inside of the inclined plate 34, it will be sprayed out through the evenly arranged nozzles 35. Then, the plastic fragments are sequentially guided into the feeding hopper 37 by the conveyor belt. The plastic fragments entering the feeding hopper 37 will fall downwards and onto the inclined plate 34. During the continuous air spraying process of the nozzles 35, the plastic fragments will be blown into the spiral gap of the spiral plate 32 and made to adhere to the spiral plate. The plastic fragments float within the spiral gap of the spiral plate 32. Since the gas introduced through the first air pipe 36 is hot gas, the plastic fragments will be dried as they float and move within the spiral gap, thereby further reducing the moisture trapped in the plastic fragments. Since the inner ring end of the spiral plate 32 is connected to the inlet 14, the hot gas carrying the plastic fragments will enter the vertical cylinder 13 together, and the hot gas will be extracted by the first extraction pipe 19. The plastic fragments will be stored in the vertical cylinder 13 and then squeezed. After the plastic fragments are squeezed, they will be introduced into the plastic recycling extruder 1. Specifically, since the spiral plate 32 is provided with multiple first conduits 38 and second conduits 39, and the first conduits 38 and second conduits 39 are staggered when viewed from above, hot air is also introduced into the second air pipe 392 when dehumidifying the plastic fragments. The hot air will enter the rectangular chamber 3. Since the first conduits 38 and second conduits 39 are connected to the rectangular chamber 3, the hot air will enter the first conduits 38 and second conduits 39. Since the first air groove 381 on the first conduit 38 is inclined towards the lower second air pipe 392, and since the second air groove 391 on the second conduit 39 is inclined towards the lower second air pipe 392, the hot air will enter the first conduit 38 and second conduit 392. The first air pipe 36 is tilted upwards. When the plastic fragment passes through the first conduit 38, the hot air ejected from the first air groove 381 will push the plastic fragment downwards and move it closer to the second air pipe 392. When the plastic fragment passes through the second air pipe 392, the hot air ejected from the second air groove 391 will push the plastic fragment upwards and move it closer to the first air pipe 36. This causes the plastic fragment to float up and down in the spiral gap. The up and down floating plastic fragment can change its position, so that the plastic fragment can better contact the hot air and improve the dehumidification effect of the plastic fragment. More specifically, since the top of the cover 31 is equipped with a door, and the door is a transparent acrylic plate, the state of the plastic fragments in the rectangular compartment 3 can be observed through the door. When the plastic fragments moving in the spiral plate 32 become blocked or accumulate, the door can be opened for processing. Furthermore, after the plastic fragments enter the guide hopper 33 through the feed hopper 37, hot air is sprayed out from the nozzle 35 on the inclined plate 34 to initially dry the falling fragments. At the same time, the airflow impact force breaks up any clumps of fragments, avoiding uneven drying caused by agglomeration. Subsequently, the fragments are carried by the hot air into the spiral gap of the spiral plate 32 and move along the spiral path, thereby extending the drying time. Simultaneously, the first conduit 38 and the second conduit 39 arranged in the spiral gap spray hot air through the inclined first air groove 381 and the second air groove 391, respectively pushing the plastic fragments downward and upward to float, so that the fragments float within the spiral gap. The reciprocating motion breaks up the accumulation of fragments, allowing the surface and folds of the plastic fragments to come into contact with hot air, further reducing the moisture content in the plastic fragments. Compared to traditional hot air drying, which only works on the surface of the fragments, this dehumidification component achieves dynamic flipping of the fragments through airflow disturbance, resulting in more uniform and thorough drying. This significantly reduces the moisture content of the plastic fragments before they enter the vertical cylinder 13, fundamentally reducing the amount of water vapor generated by moisture vaporization in the subsequent extruder melting section. This, together with the subsequent compaction and degassing process of the vertical cylinder 13, provides dual protection, further enhancing the effect of eliminating the pores 17 and pinhole defects in the recycled particles.

[0025] As an embodiment of the present invention; each of the circular grooves 24 is provided with a circular plate 4; Two sets of through pipes 41 are installed on the circular plate 4. One side of the through pipe 41 extends to the surface of the circular plate 4 and is fixed inside the circular plate 4. The other side passes through the rotating ring 2 and extends to the inner ring of the rotating ring 2 and is slidably connected to the rotating ring 2. A one-way valve is installed on the side of the through pipe 41 that extends into the circular plate 4. Rotating plates 42 are rotatable on both sides of the rotating ring 2; fixing plates 43 are fixed on both sides of the two rotating plates 42; two horizontal plates 44 are fixed on the fixing plates 43, and the other side of the horizontal plates 44 is fixed on the concave plate 21. A second suction tube 45 is installed on the horizontal plate 44 located on the right side, and the second suction tube 45 is connected to the inner ring of the rotating ring 2. In this embodiment, a base plate 46 is fixed to one side of the through pipe 41 extending to the inner ring of the rotating ring 2 on each of the circular plates 4, and the through pipe 41 passes through the base plate 46 and is flush with the surface of the base plate 46; a spring is connected to the base plate 46, and the other side of the spring is connected to the inner ring of the rotating ring 2. A second electric actuator 47 is installed on the rotating plate 42 located on the left side, and the extension rod of the second electric actuator 47 extends into the rotating ring 2; a wedge block 48 is fixed on the extension rod of the second electric actuator 47. In this embodiment, a rectangular groove is formed on the surface of the circular plate 4, and the two sides of the rectangular groove are designed with rounded corners on the arc surface of the circular plate 4. The rectangular groove is provided with two top plates 5; the two top plates 5 on opposite sides are rotatable in the rectangular groove via a rotating shaft. On the opposite side of the two top plates 5, a sliding groove 51 is provided in the inner circle of the circular groove 24, and the sliding groove 51 extends to the circular rings 22 on both sides, but does not penetrate the circular rings 22; The top plate 5 extends into the circular groove 24; a stop rod 52 is fixed on one side of the top plate 5 that extends into the circular groove 24.

[0026] Since the circular groove 24 is equipped with a circular plate 4, when the pressure plate 16 presses the plastic fragment into the circular groove 24, the plastic fragment is squeezed between the pressure plate 16 and the circular plate 4. During the process of squeezing the plastic fragment, the gas trapped near the circular plate 4 is squeezed into the through pipe 41. The gas entering the through pipe 41 first passes through a one-way valve and then enters the inside of the rotating ring 2. Since the two sides of the rotating ring 2 are blocked by the rotating plate 42, and a second suction pipe 45 is installed on one of the rotating plates 42, during the process of squeezing the plastic fragment, the second suction pipe 45 is connected to the external vacuum cleaner, so that the gas in the inner ring of the rotating ring 2 can be extracted. At the same time, since the inner ring of the rotating ring 2 is connected to the circular groove 24 through the through pipe 41, the plastic fragment in the circular groove 24 can also be extracted during the process of the second suction pipe 45. When the plastic fragment moves with the rotating ring 2 and the circular groove 24, the plastic fragment in the circular groove 24 can also be extracted through the through pipe 41. Specifically, since the rotating plate 42 is fixed on the fixed plate 43, and the fixed plate 43 is fixed on the horizontal plate 44, the rotating plate 42 will not rotate with the rotating ring 2 during the rotation of the rotating ring 2. When the circular groove 24 drives the plastic fragment to rotate to the bottom, the second electric push rod 47 is extended. The extended second electric push rod 47 will drive the inclined block 48 to move towards the bottom plate 46. When the inclined plate 34 contacts the bottom plate 46, it will gradually push the bottom plate 46 down and compress the spring between the bottom plate 46 and the rotating ring 2. When the bottom plate 46 moves down, it will push the circular plate 4 down through the through pipe 41. The moving circular plate 4 will push the plastic fragment down, thereby pushing the plastic fragment out of the circular groove 24. The pushed plastic fragment will enter the loose component. In this process, the plastic fragment can be prevented from getting stuck in the circular groove 24 and unable to be removed. Then, the second electric push rod 47 is controlled to drive the inclined plate 34 back to the initial state, and the bottom plate 46 returns to the initial state under the action of the spring, while driving the circular plate 4 back to the initial state. More specifically, since the top plate 5 rotates within the rectangular groove of the circular plate 4, and part of the top plate 5 slides within the slide groove 51, when the circular plate 4 moves downward, it will drive the top plate 5 to move downward along the slide groove 51. Since the slide groove 51 extends to the ring 22, the top plate 5 will drive the abutment 52 to gradually move into the slide groove 51 within the ring 22. When the abutment 52 contacts the bottom of the slide groove 51, since the abutment 52 is restricted and the circular plate 4 will continue to push the top plate 5 to move, part of the top plate 5 will rotate out of the rectangular groove. The rotated-out top plate 5 will push the plastic fragment downward, thereby pushing the plastic fragment away from the circular plate 4, thus preventing the plastic fragment from adhering to the circular plate 4. When the circular plate 4 moves upward, it will drive the top plate 5 to return to its initial state along the slide groove 51. Furthermore, when the pressure plate 16 presses the plastic fragments into the circular groove 24, the fragments are squeezed between the pressure plate 16 and the circular plate 4. During this process, not only can the first extraction pipe 19 above the pressure plate 16 extract the gas in the vertical cylinder 13, but the fragments near the side of the circular plate 4, carrying gas, will also be squeezed into the through pipe 41. At the same time, the second extraction pipe 45, which is connected to the inner ring of the rotating ring 2, continuously extracts gas. Even when the rotating ring 2 drives the circular groove 24 to rotate, the through pipe 41 can still continuously extract the gas from the plastic fragments in the circular groove 24. Compared with the process of relying solely on the vertical cylinder 13 to compact and exhaust gas, this structure achieves simultaneous removal of gas from both the upper and lower sides of the fragments, greatly improving exhaust efficiency and further reducing the gas content of the fragments before entering the extruder, thus minimizing the possibility of gas residue in the melt from the source.

[0027] As one embodiment of the present invention; the loosening component includes a processing chamber 6, and the top of the processing chamber 6 is fixed to the bottom of the concave plate 21; The bottom of the processing chamber 6 is fixed to the plastic recycling extruder 1, and the feed port of the plastic recycling extruder 1 is located inside the processing chamber 6; A rotating roller 61 is installed inside the processing chamber 6, and the rotating roller 61 is driven by a second motor, which is mounted on the processing chamber 6. The roller 61 is provided with a vertical plate 62, which intersects with the ring 22; a scraper 63 is fixed on the vertical plate 62, and the scraper 63 is located between the two rings 22. In this embodiment, a slide rail 64 is provided inside the rotating roller 61, and the upright plate 62 slides within the slide rail 64; The slide 64 is equipped with a spring, and the spring is fixed on the upright plate 62. In the initial state, under the action of the spring, part of the upright plate 62 slides out from the slide 64.

[0028] The second motor drives the rotating roller 61 to rotate cyclically. The rotating roller 61 drives the vertical plate 62 and the scraper 63 to rotate cyclically. Since the vertical plate 62 slides in the slide rail 64 through the spring, the vertical plate 62 is in an extended state when the roller 61 drives the vertical plate 62 to rotate. When the vertical plate 62 rotates to the position of the ring 22, it will contact the ring 22 and be obstructed by the ring 22. As the vertical plate 62 continues to rotate, under the obstruction of the ring 22, the vertical plate 62 will be gradually pressed into the slide rail 64 and the spring in the slide rail 64 will be compressed. Therefore, when the vertical plate 62 rotates and passes the ring 22, the vertical plate 62 can move along the outer contour of the ring 22. At the same time, the scraper 63 will move between the two rings 22. Specifically, as the plastic fragments in the circular groove 24 are gradually pushed out, the rotating scraper 63 will circulate under the circular groove 24. The rotating scraper 63 will contact the bottom of the pushed-out plastic fragments in turn, so that the bottom of the plastic fragments can be scraped gradually, and the plastic fragments can be scraped off from the bottom in turn. The scraped plastic fragments will fall into the plastic recycling extruder 1, thus avoiding the compacted plastic fragments from entering the plastic recycling extruder 1 together, which would cause uneven heating and incomplete heat melting of the compacted plastic fragments. More specifically, when the plastic fragments in the circular groove 24 are pushed into the processing chamber 6, the second motor drives the rotating roller 61 to continuously rotate the scraper 63. The scraper 63 precisely acts on the bottom of the plastic fragments, breaking down the entire plastic fragment into loose plastic fragments by scraping layer by layer. This avoids the situation where large, compacted materials directly enter the extruder, resulting in insufficient local plasticization or local overheating and degradation due to poor internal heat transfer. The loosened plastic fragments are uniform in size, with a more sufficient contact area with the extruder screw, and can evenly absorb the heat generated by screw shearing and barrel heating, ensuring the consistency of the subsequent melting and plasticizing process. This further guarantees the mechanical property stability of the recycled granules and provides key support for improving the quality of recycled granules.

[0029] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic packaging bag processing waste recycling equipment, comprising a plastic recycling extruder (1), wherein the plastic recycling extruder (1) is installed on a table; Its features are, The plastic recycling extruder (1) is equipped with a feeding mechanism at its inlet; the feeding mechanism includes a mounting platform (11); A through groove (12) is provided in the middle of the tabletop; a vertical cylinder (13) is fixed to the top of the through groove (12); an inlet (14) is provided at the bottom of the vertical cylinder (13); A first electric actuator (15) is installed on the top of the vertical cylinder (13); a pressure plate (16) slides inside the vertical cylinder (13), and the pressure plate (16) is fixedly connected to the extension rod of the first electric actuator (15); the pressure plate (16) is provided with evenly arranged air holes (17), and a one-way valve is installed in each air hole (17); a mesh cylinder (18) is fixed on the top of the pressure plate (16); The top of the vertical cylinder (13) is equipped with multiple first suction pipes (19); the mounting platform (11) is equipped with a dehumidification assembly; The mounting platform (11) has a rotating ring (2) at its bottom; both sides of the rotating ring (2) have concave plates (21), and the concave plates (21) are fixed to the bottom of the mounting platform (11); the rotating ring (2) rotates within the concave plates (21); Two circular rings (22) are fixed on the outer ring surface of the rotating ring (2); the inner ring of the concave plate (21) and the bottom of the mounting platform (11) are both provided with arc grooves (23), and the circular rings (22) rotate in the arc grooves (23); The outer ring (2) has evenly arranged circular grooves (24) on its outer surface; One of the rings (22) has evenly arranged toothed grooves (25) on its outer side; a gear (26) rotates inside the concave plate (21), and the gear (26) meshes with the toothed grooves (25); the gear (26) is driven by a first motor; A loose component is provided below the rotating ring (2); The dehumidification assembly includes a rectangular chamber (3); a cover (31) is fixed to the top of the rectangular chamber (3); The cover (31) has a through hole, and the vertical cylinder (13) passes through the through hole and is slidably connected to the through hole; the rectangular compartment (3) is installed on the mounting platform (11); The rectangular compartment (3) is provided with a spiral plate (32) and fixed on the cover (31); the vertical cylinder (13) passes through the inner ring of the spiral plate (32) and the inlet (14) on the vertical cylinder (13) is connected to the end of the inner ring of the spiral plate (32); The outer ring of the spiral plate (32) is fixed with a guide bin (33), and the guide bin (33) is connected to the outer ring of the spiral plate (32); an inclined plate (34) is fixed inside the guide bin (33); a nozzle (35) is fixed on the inclined plate (34); The feed hopper (33) is connected to a first air pipe (36), and the first air pipe (36) extends to the inside of the inclined plate (34), and the other side of the first air pipe (36) extends to the outside. The top of the feed hopper (33) is fixed with a feed hopper (37), and the feed hopper (37) is installed on the top of the cover (31).

2. The waste recycling equipment for plastic packaging bag processing according to claim 1, characterized in that: The spiral plate (32) has a uniformly arranged first conduit (38) in the spiral gap, and the first conduit (38) is located at the top of the spiral plate (32); The spiral plate (32) has a uniformly arranged second conduit (39) in the spiral gap, and the second conduit (39) is located at the bottom of the spiral plate (32); the second conduit (39) and the first conduit (38) are arranged alternately. The first conduit (38) has evenly arranged first air grooves (381) and the first air grooves (381) are inclined toward the lower second air pipe (392); the second conduit (39) has evenly arranged second air grooves (391) and the second air grooves (391) are inclined toward the upper first air pipe (36). The first conduit (38) and the second conduit (39) are both connected to the internal space of the rectangular chamber (3); the outer ring of the rectangular chamber (3) is fixed with uniformly arranged second air tubes (392).

3. The waste recycling equipment for plastic packaging bag processing according to claim 2, characterized in that: The top of the cover (31) is equipped with a door, and the door is a transparent acrylic sheet.

4. The waste recycling equipment for plastic packaging bag processing according to claim 3, characterized in that: Each of the circular grooves (24) is provided with a circular plate (4); Two sets of through pipes (41) are installed on the circular plate (4), and one side of the through pipe (41) extends to the surface of the circular plate (4) and is fixed inside the circular plate (4), while the other side passes through the rotating ring (2) and extends to the inner ring of the rotating ring (2) and is slidably connected to the rotating ring (2); a one-way valve is installed on the side of the through pipe (41) that extends into the circular plate (4); The rotating ring (2) has rotating plates (42) on both sides; fixed plates (43) are fixed on both sides of the two rotating plates (42); two horizontal plates (44) are fixed on the fixed plates (43), and the other side of the horizontal plates (44) is fixed on the concave plate (21); A second suction tube (45) is installed on the horizontal plate (44) located on the right side, and the second suction tube (45) is connected to the inner ring of the rotating ring (2).

5. The waste recycling equipment for plastic packaging bag processing according to claim 4, characterized in that: Each of the circular plates (4) has a tube (41) extending to one side of the inner ring of the rotating ring (2) and a base plate (46) is fixed thereon. The tube (41) passes through the base plate (46) and is flush with the surface of the base plate (46). A spring is connected to the base plate (46) and the other side of the spring is connected to the inner ring of the rotating ring (2). A second electric actuator (47) is installed on the rotating plate (42) located on the left side, and the extension rod of the second electric actuator (47) extends into the rotating ring (2); a wedge (48) is fixed on the extension rod of the second electric actuator (47).

6. The waste recycling equipment for plastic packaging bag processing according to claim 5, characterized in that: The circular plate (4) has a rectangular groove on its surface, and the two sides of the rectangular groove are located on the arc surface of the circular plate (4) with rounded corners. The rectangular groove is provided with two top plates (5); the two top plates (5) on opposite sides are rotated within the rectangular groove via a rotating shaft; The two top plates (5) are provided with a sliding groove (51) on the inner circle of the circular groove (24) on the opposite side, and the sliding groove (51) extends to the circular rings (22) on both sides, but does not penetrate the circular rings (22); The top plate (5) extends into the circular groove (24); a stop bar (52) is fixed on one side of the top plate (5) extending into the circular groove (24).

7. The waste recycling equipment for plastic packaging bag processing according to claim 1, characterized in that: The loose assembly includes a processing chamber (6), and the top of the processing chamber (6) is fixed to the bottom of the concave plate (21); The bottom of the processing chamber (6) is fixed on the plastic recycling extruder (1), and the feed port of the plastic recycling extruder (1) is located inside the processing chamber (6); A rotating roller (61) rotates inside the processing chamber (6), and the rotating roller (61) is driven by a second motor, which is mounted on the processing chamber (6). The roller (61) is provided with a vertical plate (62), and the vertical plate (62) intersects with the ring (22); a scraper (63) is fixed on the vertical plate (62), and the scraper (63) is located between the two rings (22).

8. The waste recycling equipment for plastic packaging bag processing according to claim 7, characterized in that: The roller (61) has a slide rail (64) inside, and the vertical plate (62) slides in the slide rail (64); The slide (64) is equipped with a spring, and the spring is fixed on the upright plate (62). In the initial state, under the action of the spring, part of the upright plate (62) slides out from the slide (64).

Images