Injection molding equipment for recycling plastic processing

Abstract

The application relates to the technical field of plastic processing equipment, in particular to injection molding equipment for recycling plastic processing. The technical scheme comprises a cylinder body fixedly installed in a machine body, further comprises a staged drying part installed in the cylinder body, the staged drying part comprises a drying cylinder fixedly installed in the cylinder body, a plurality of supporting trays are rotationally installed in the drying cylinder, a plurality of air holes are arranged on the supporting trays, and accommodating cavities are formed between two adjacent supporting trays, and the staged drying part controls the materials in the upper accommodating cavities to move to the lower accommodating cavities in sequence. The application breaks the humidity gradient through dynamic displacement, opens the discharge port through the linkage of the plurality of first blocking rings by the air cylinder, and under the action of the rotating centrifugal force of the supporting trays, the high-humidity materials on the top are moved to the high-temperature drying area layer by layer, the materials experience the progressive drying path of high-humidity low-temperature, medium-humidity medium-temperature and low-humidity high-temperature, and the water content rate difference between the top layer and the bottom layer is reduced.

Description

Technical Field

[0001] This invention relates to the field of plastic processing equipment technology, and in particular to an injection molding machine for processing recycled plastics. Background Technology

[0002] In the operation system of injection molding equipment for recycled plastics, the plastic drying cylinder, as a core pretreatment device, forms a tight process loop with the injection molding machine. The injection molding machine melts and molds recycled plastic granules under high temperature and pressure. However, the recycled material often carries 2% to 5% moisture due to the crushing and washing process. If it enters the injection molding machine screw directly, the moisture will vaporize at high temperature, causing melt bubbles, silver streaks, or even hydrolytic degradation. At this time, the core role of the drying cylinder becomes prominent: it introduces deep drying hot air with a dew point ≤ -40℃ from the bottom, penetrating the recycled plastic layer from bottom to top, reducing the moisture content to below 0.005% within 6 to 8 hours. The dried granules are then precisely fed into the injection molding machine hopper through a pneumatic valve at the bottom, ensuring melt purity and reducing injection molding energy consumption by preheating the granules.

[0003] After the gas enters from the bottom of the drying cylinder, as it penetrates the layer of recycled plastic granules upwards, the gas continuously adsorbs moisture from the surface of the plastic granules due to the mass transfer equilibrium between the gas and solid phases. This causes the absolute humidity of the gas itself to gradually increase along the height of the cylinder. Simultaneously, as the gas rises, its temperature gradually decreases due to heat transfer to the plastic granules, leading to a further sharp increase in the relative humidity of the gas – reaching more than twice that of the bottom region in the top area. When the hot, humid gas reaches the top layer of material, the mass transfer driving force for moisture diffusion from the interior of the plastic to the surface is significantly weakened due to the significantly reduced gas-water potential difference. Furthermore, the irregular shape of the recycled plastic forms a denser material layer structure at the top, further hindering airflow penetration. This dual effect results in the top layer material always being in a harsh "high humidity, low temperature" drying environment, with a moisture content potentially higher than the bottom layer, creating a difficult-to-eliminate drying dead zone. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by proposing an injection molding device for recycling plastics that gradually moves the top plastic downwards to prevent the formation of a drying dead zone.

[0005] The technical solution of the present invention: An injection molding device for recycling plastics, comprising a cylinder fixedly installed inside the machine body, and further comprising:

[0006] A grading drying component installed inside the cylinder body includes a drying cylinder fixedly installed inside the cylinder body. Multiple support trays are rotatably installed inside the drying cylinder. Multiple air holes are provided on the support trays. A receiving cavity is formed between two adjacent support trays. The grading drying component controls the material inside the upper receiving cavity to move sequentially to the lower receiving cavity.

[0007] A drive mechanism mounted on the machine body and driving the rotation of the multiple said trays;

[0008] A discharge mechanism is provided on the drying cylinder, the discharge mechanism including discharge ports corresponding to multiple support trays one by one and a first sealing component for controlling the opening and closing state of the discharge ports;

[0009] The material feeding mechanism includes a discharge hole located on the rising tray in a one-to-one correspondence with the tray and a second sealing component for controlling the sealing state of the discharge hole;

[0010] Multiple guide plates are fixedly installed between the inner wall of the cylinder and the outer wall of the drying cylinder, corresponding one-to-one with the support trays and located below them. A transfer cavity is formed between two adjacent guide plates. The guide plates receive the material flowing out through the upper discharge port and guide the material through the lower discharge hole.

[0011] A gas circulation component installed inside the machine body that inputs dry, high-temperature gas to the bottom of the drying cylinder and extracts it from the top of the drying cylinder.

[0012] Optionally, the first sealing assembly includes a first sealing ring that is slidably installed on the outside of the drying cylinder and corresponds one-to-one with the discharge port. Two adjacent first sealing rings are fixedly connected by multiple first connecting rods. A first synchronization plate is fixedly installed on the multiple first connecting rods at the bottom. A first cylinder that is fixedly connected to the first synchronization plate is fixedly installed inside the machine body.

[0013] Optionally, the second sealing assembly includes multiple second sealing rings that are slidably installed on the outside of the drying cylinder and correspond one-to-one with the discharge holes. The multiple second sealing rings are fixedly connected by multiple second connecting rods, and the bottoms of the multiple second connecting rods are fixedly connected by a second synchronization plate. A second cylinder is fixedly installed inside the machine body, and the output shaft of the second cylinder is fixedly connected to the second synchronization plate.

[0014] Optionally, an air blowing ring is fixedly installed on the inner wall of the cylinder and located in the transfer cavity. The air blowing ring has multiple air blowing holes arranged in a circumferential array, and the inside of the air blowing ring is connected to an air source.

[0015] Optionally, a vibrator is fixedly installed on the cylinder, and the vibrator drives the cylinder to vibrate at high frequency.

[0016] Optionally, the drive mechanism includes a drive shaft rotatably mounted on the drying cylinder and the machine body, a motor fixedly mounted on the machine body, the output shaft of the motor being fixedly connected to the drive shaft, and multiple support trays being fixedly connected to the drive shaft.

[0017] Optionally, the drying cylinder is equipped with an air pore maintenance component, which includes filter plates fixedly installed inside the drying cylinder and corresponding one-to-one with the support tray and located below it, and a backflushing cleaning component for backflushing the material adhering to the filter plates.

[0018] Optionally, the backflushing cleaning assembly includes a backflushing box fixedly installed on the drive shaft, an air box inside the backflushing box, the air box being connected to an external air source, a plurality of backflushing holes at the bottom of the backflushing box, a guide plate fixedly installed on the drive shaft directly below the backflushing box, the guide plate having a guide groove, the guide groove having an upward curve, and a baffle fixedly installed on the guide plate in the direction of the extension line of the upward curve;

[0019] The drive shaft is provided with an air supply hole, and a connector for connecting to an external air source is fixedly installed on the cylinder. An air pipe is fixedly installed at one end of the connector, and the other end of the air pipe is connected to the bottom of the drive shaft through a rotating joint.

[0020] Optionally, the gas circulation component includes an air inlet pipe fixedly installed at the bottom of the cylinder, a flow guide shroud fixedly installed inside the cylinder, the flow guide shroud communicating with the interior of the drying cylinder, an exhaust pipe provided at the top of the cylinder, the exhaust pipe being connected in sequence to a cooling device for cooling the gas and a heating device for heating the gas, and the outlet of the heating device communicating with the air inlet pipe.

[0021] Optionally, a feed pipe is fixedly installed at the top of the drying cylinder and a discharge pipe is fixedly installed at the bottom. A support plate is provided inside the cylinder to support the bottom of the drying cylinder, and the support plate is provided with multiple discharge holes.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] This invention uses dynamic displacement to overcome humidity gradients. By linking multiple layers of first sealing rings with cylinders, the discharge port is opened. Under the centrifugal force of the rotating tray, the high-moisture material at the top is moved down layer by layer to the high-temperature drying zone. The material undergoes a progressive drying path of high humidity and low temperature → medium humidity and medium temperature → low humidity and high temperature, which reduces the extreme difference in moisture content between the top and bottom layers. Attached Figure Description

[0024] Figure 1 Schematic diagram of injection molding equipment used for recycling plastics Figure 1 ;

[0025] Figure 2 Schematic diagram of injection molding equipment used for recycling plastics Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the cylinder structure;

[0027] Figure 4 This is a schematic diagram of the internal structure of the cylinder;

[0028] Figure 5 This is a schematic diagram of the structure of the graded drying component;

[0029] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0030] Figure 7 This is a structural schematic diagram of the support plate;

[0031] Figure 8 This is a schematic diagram showing the location of the discharge port and the discharge hole;

[0032] Figure 9 This is a schematic diagram showing the location distribution of the first sealing ring;

[0033] Figure 10 This is a schematic diagram of the structure of the first synchronization plate and the second synchronization plate;

[0034] Figure 11 This is a schematic diagram of the internal structure of the drive shaft;

[0035] Figure 12 for Figure 11 A magnified view of a section at point B in the middle;

[0036] Figure 13 This is a schematic diagram of the pallet structure;

[0037] Figure 14 This is a schematic diagram of the filter's structure;

[0038] Figure 15 This is a structural schematic diagram of the pore maintenance component;

[0039] Figure 16 This is a schematic diagram of the backflush box and the baffle plate.

[0040] Reference numerals: 1. Machine body; 2. Cylinder; 3. Grading and drying component; 31. Drying cylinder; 32. Support tray; 321. Air vent; 33. Receiving cavity; 34. Transfer cavity; 341. Guide plate; 342. Support plate; 343. Discharge hole; 35. Discharge mechanism; 351. Discharge port; 352. First sealing ring; 353. First connecting rod; 354. First synchronization plate; 355. First cylinder; 36. Discharge mechanism; 361. Discharge hole; 362. Second sealing ring; 363. Second connecting rod; 364. 1. Second synchronization plate; 365. Second cylinder; 37. Air blow ring; 371. Air blow hole; 4. Drive mechanism; 41. Transmission shaft; 42. Motor; 5. Inlet pipe; 51. Exhaust pipe; 52. Flow guide; 6. Air hole maintenance component; 61. Filter; 62. Backflush box; 621. Air box; 622. Backflush hole; 63. Flow guide plate; 631. Flow guide groove; 632. Upward-curving part; 64. Baffle; 65. Air outlet; 66. Connector; 67. Air pipe; 68. Rotary joint; 7. Feed pipe; 71. Discharge pipe. Detailed Implementation

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] like Figures 1 to 5 As shown, the present invention proposes an injection molding equipment for recycling plastics, including a body 1 and a cylinder 2 fixedly installed inside the body 1, and a graded drying component 3 installed inside the cylinder 2. The graded drying component 3 can convey plastic fragments from top to bottom sequentially, preventing incomplete dehumidification at the top, increasing overall drying efficiency, and reducing energy consumption. The graded drying component 3 includes a drying cylinder 31 fixedly installed inside the cylinder 2. Multiple support trays 32 are rotatably installed inside the drying cylinder 31. The support trays 32 are provided with multiple air holes 321. The support trays 32 are used to support plastic fragments. Gas can flow upward through the air holes 321 and pass through the support trays 32. A receiving cavity 33 is formed between two adjacent support trays 32. Multiple receiving cavities 33 can be formed by setting multiple support trays 32. The plastic in the lower receiving cavity 33 will be dried first. After the plastic in the bottom receiving cavity 33 is dried, the plastic is discharged, and the upper layer of plastic is conveyed to the bottom. This allows the plastic to flow sequentially from top to bottom in the drying cylinder 31, which can effectively increase the drying efficiency.

[0043] As one implementation method, such as Figures 4 to 10 and Figure 13As shown, the injection molding equipment in this embodiment also includes a discharge mechanism 35 disposed on the drying cylinder 31. The discharge mechanism 35 includes a discharge port 351 corresponding to a plurality of support trays 32 and a first sealing component for controlling the opening and closing state of the discharge port 351. When the discharge port 351 is opened, the plastic inside the receiving cavity 33 can be thrown out through the discharge port 351 by rotating the support tray 32 under centrifugal force.

[0044] Furthermore, the injection molding equipment also includes a discharge mechanism 36, which includes discharge holes 361 corresponding to the support trays 32 and located on their upward sides, and a second sealing component for controlling the sealing state of the discharge holes 361. Multiple guide plates 341, corresponding to and located below the support trays 32, are fixedly installed between the inner wall of the cylinder 2 and the outer wall of the drying cylinder 31. A transfer cavity 34 is formed between two adjacent guide plates 341. The guide plates 341 receive the material flowing out through the upper discharge port 351 and guide the material through the lower discharge hole 361. The plastic discharged through the discharge port 351 will enter the transfer cavity 34 and fall onto the guide plates 341. The guide plates 341 have inclined surfaces, which will cause the plastic to move towards the discharge hole 361, allowing the plastic to enter the lower receiving cavity 33 through the discharge hole 361, thus completing the transfer of the plastic.

[0045] The cylinder 2 is provided with a support plate 342 that supports the bottom of the drying cylinder 31. The support plate 342 is provided with multiple discharge holes 343. The plastic above is transferred multiple times and finally moves to the bottom receiving cavity 33. Finally, it enters the gap between the cylinder 2 and the drying cylinder 31 through the bottom discharge port 351 and falls downward under the action of gravity, and is finally discharged through the discharge hole 343.

[0046] Furthermore, the first sealing assembly includes a first sealing ring 352 slidably installed on the outside of the drying cylinder 31 and corresponding one-to-one with the discharge port 351. Adjacent first sealing rings 352 are fixedly connected by multiple first connecting rods 353. A first synchronization plate 354 is fixedly installed on the multiple first connecting rods 353 at the bottom. A first cylinder 355 with an output shaft fixedly connected to the first synchronization plate 354 is fixedly installed inside the machine body 1. The first cylinder 355 can drive the first synchronization plate 354 to move up and down, which can cause the multiple first connecting rods 353 to move up and down. When the first connecting rod 353 rises, it will drive the first sealing ring 352 to rise. The rising first sealing ring 352 will be misaligned with the discharge port 351. At this time, the first sealing ring 352 will not block the plastic, so that the plastic can be discharged through the discharge port 351 and enter the transfer chamber 34.

[0047] Furthermore, the second sealing assembly includes multiple second sealing rings 362 slidably mounted on the outside of the drying cylinder 31 and corresponding one-to-one with the discharge holes 361. These multiple second sealing rings 362 are fixedly connected by multiple second connecting rods 363, the bottoms of which are fixedly connected by a second synchronous plate 364. A second cylinder 365 is fixedly installed inside the machine body 1, and the output shaft of the second cylinder 365 is fixedly connected to the second synchronous plate 364. When the plastic is discharged through the discharge port 351, the discharge port 351 is closed by the first cylinder 355. 1. The second cylinder 365 drives the second synchronous plate 364 to rise. The rising second synchronous plate 364 drives multiple second connecting rods 363 to move synchronously, causing the second sealing ring 362 to rise, which opens the discharge hole 361. At this time, the plastic inside the transfer cavity 34 can slide out and enter the lower receiving groove. Then, the second cylinder 365 drives the second sealing ring 362 to seal the discharge hole 361, thus completing the entire process of transferring the plastic inside the upper receiving cavity 33 to the lower receiving cavity 33.

[0048] An air blowing ring 37 is fixedly installed on the inner wall of the cylinder 2 and inside the transfer cavity 34. The air blowing ring 37 has multiple air blowing holes 371 arranged in a circular array. The air blowing ring 37 is connected to an air source. The external air source delivers high-pressure gas to the air blowing ring 37. The high-pressure gas is discharged through the air blowing holes 371, which can blow the plastic inside the transfer cavity 34, so that the plastic inside the transfer cavity 34 is discharged quickly and the material is prevented from getting stuck inside the transfer cavity 34. A vibrator is fixedly installed on the cylinder 2. The vibrator drives the cylinder 2 to vibrate at high frequency. Through the vibration of the drying cylinder 31 and the support tray 32, the plastic can be evenly dispersed on the support tray 32 and the transfer speed of the plastic can be increased.

[0049] As one implementation method, such as Figure 4 and Figure 5 As shown, the injection molding equipment in this embodiment also includes a drive mechanism 4 mounted on the machine body 1 and driving multiple trays 32 to rotate. The drive mechanism 4 includes a transmission shaft 41 rotatably mounted on the drying cylinder 31 and the machine body 1. A motor 42 is fixedly mounted on the machine body 1. The output shaft of the motor 42 is fixedly connected to the transmission shaft 41. Multiple trays 32 are fixedly connected to the transmission shaft 41. By driving the transmission shaft 41 to rotate through the motor 42, the multiple trays 32 can be driven to rotate through the transmission shaft 41. Under the influence of the rotation of the trays 32, the material located on the trays 32 can be thrown out under the action of centrifugal force, so that the plastic can enter the transfer chamber 34 through the discharge port 351.

[0050] As one implementation method, such as Figures 3 to 5As shown, the injection molding equipment in this embodiment also includes a gas circulation component installed inside the machine body 1, which inputs dry high-temperature gas to the bottom of the drying cylinder 31 and extracts it from the top of the drying cylinder 31. The gas circulation component includes an air inlet pipe 5 fixedly installed at the bottom of the cylinder body 2. A flow guide shroud 52 is fixedly installed inside the cylinder body 2. The flow guide shroud 52 is connected to the interior of the drying cylinder 31. Gas is input into the flow guide shroud 52 through the air inlet pipe 5, and under the action of the flow guide shroud 52, the gas enters the interior of the drying cylinder 31 without affecting the space between the drying cylinder 31 and the cylinder body 2. This space is the channel for the plastic to be transported downwards, so that the plastic is not affected by the lift force of the gas when it moves downwards. An exhaust pipe 51 is provided at the top of the cylinder body 2. The exhaust pipe 51 is connected in sequence to a cooling device for cooling the gas and a heating device for heating the gas. The outlet of the heating device is connected to the air inlet pipe 5. The gas entering the interior of the drying cylinder 31 passes through multiple air holes 321 from bottom to top and penetrates multiple receiving cavities 33, and finally exits through the exhaust pipe 51. The cooling device and the heating device are existing technologies and will not be described in detail here.

[0051] like Figures 11 to 16 As shown, in this embodiment, an air vent maintenance component 6 is installed inside the drying cylinder 31. The air vent maintenance component 6 includes a filter 61 fixedly installed inside the drying cylinder 31 and corresponding one-to-one with the support tray 32 and located below it, and a backflushing cleaning component for backflushing the material adhering to the filter 61. The plastic is generally placed in fragments inside the receiving cavity 33, and when it rises, the airflow will carry the fragments upward. The rising fragments can easily block the air vents 321, causing the airflow to be unable to be effectively transmitted upward. At this time, the air vent maintenance component 6 can prevent this problem from occurring.

[0052] Furthermore, the backflushing cleaning assembly includes a backflushing box 62 fixedly mounted on the drive shaft 41. The backflushing box 62 contains an air box 621 connected to an external air source. The bottom of the backflushing box 62 has multiple backflushing holes 622. A guide plate 63 is fixedly mounted on the drive shaft 41 directly below the backflushing box 62. The guide plate 63 has a guide groove 631 with an upward-curving portion 632. Plastic fragments lifted by the rising airflow will block the filter element 61 and adhere to it. At this time, the drive shaft is driven by the motor 42. 41 rotates slowly, which drives the backflush box 62 and the guide plate 63 to rotate synchronously. High-pressure gas is injected into the backflush box 62, and the gas is ejected through the backflush hole 622 to backflush the filter 61. This causes the broken fragments adhering to the filter 61 to move downward and enter the guide plate 63. The upward-curved part 632 prevents the rising airflow inside the drying cylinder 31 from directly entering the guide plate 63, thus preventing airflow interference and reducing the air pressure inside the backflush box 62, thereby reducing energy consumption.

[0053] The guide plate 63 is fixedly installed with a baffle 64 located in the direction of the extension line of the upturned part 632. Plastic debris will be sprayed out through the upturned part 632. Since the upturned part 632 faces upward, it is easy to blow the plastic debris cleaned off the filter plate 61 back onto the filter plate 61. By setting the baffle 64, the plastic debris passing through the upturned part 632 will directly hit the baffle 64 and bounce downward under the action of the reaction force, preventing the plastic debris passing through the upturned part 632 from directly adhering to the filter plate 61 again.

[0054] The drive shaft 41 is provided with an air inlet 65. A connector 66 connected to an external air source is fixedly installed on the cylinder 2. An air pipe 67 is fixedly installed at one end of the connector 66. The other end of the air pipe 67 is connected to the bottom of the drive shaft 41 through a rotating joint 68. The backflush box 62 is connected to the air inlet 65. By inputting high-pressure gas into the connector 66, the gas can enter the backflush box 62 through the air pipe 67 and the air inlet 65.

[0055] like Figures 2 to 5 As shown, in this embodiment, a feed pipe 7 is fixedly installed at the top of the drying cylinder 31 and a discharge pipe 71 is fixedly installed at the bottom. The plastic discharged through the bottom receiving cavity 33 will move downward and enter the discharge pipe 71, and finally be discharged through the discharge pipe 71. Plastic is then fed into the receiving cavity 33 at the top through the feed pipe 7, thus completing the automatic loading and unloading. The plastic can be dried continuously without stopping the machine for manual feeding.

[0056] It should be noted that the wet recycled plastic enters the uppermost receiving cavity 33 of the drying cylinder 31 through the top feed pipe 7. The drive shaft 41 is rotated by the motor 42 of the drive mechanism 4, causing the multi-layer support trays 32 to rotate synchronously. The drying gas is input from the bottom of the drying cylinder through the air inlet pipe 5 and the guide hood 52 of the gas circulation component. It passes through the air holes 321 of the support trays from bottom to top through each layer of receiving cavity 33 and is discharged from the exhaust pipe 51. During this process, the airflow forms a humidity gradient due to the adsorption of moisture. The top area is prone to forming a drying dead zone due to the low temperature and high humidity environment. To solve this problem, the equipment dynamically controls the material position through the graded drying component 3: when the material of a certain layer is dried to the standard, the first cylinder 355 is linked with the first sealing ring 352 to open the discharge port 351. The rotating support trays 32 throw the material out under the action of centrifugal force. The material enters the transfer chamber 34; the guide plate 341 guides the material to slide towards the discharge hole 361. At this time, the second cylinder 365 drives the second sealing ring 362 to open the discharge hole. With the assistance of the high-pressure airflow of the air blowing ring 37 and the high-frequency vibration of the cylinder 2, the material falls accurately into the lower receiving chamber 33, realizing the periodic transfer of material from the high humidity and low temperature zone to the high temperature drying zone. At the same time, the air hole maintenance component 6 sprays high-pressure gas onto the filter 61 through the back-blowing box 62 to remove the debris blocking the air hole 321. The debris rebounds and falls back through the guide groove 631 and the baffle 64 to ensure smooth airflow. Finally, the dried plastic passes through the bottom discharge port 351 and the discharge hole 343 and is output to the injection molding host through the discharge pipe 71, forming a continuous drying-injection molding closed loop, completely eliminating the problem of uneven moisture content caused by static drying, and greatly improving drying efficiency.

[0057] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An injection molding machine for recycling plastics, comprising a body (1) and a cylinder (2) fixedly installed inside the body (1), characterized in that, Also includes: A grading drying component (3) is installed inside the cylinder (2). The grading drying component (3) includes a drying cylinder (31) fixedly installed inside the cylinder (2). Multiple support trays (32) are rotatably installed inside the drying cylinder (31). Multiple air holes (321) are provided on the support trays (32). A receiving cavity (33) is formed between two adjacent support trays (32). The grading drying component (3) controls the material inside the upper receiving cavity (33) to move sequentially to the lower receiving cavity (33). A drive mechanism (4) is mounted on the body (1) and drives the rotation of the plurality of said trays (32). A discharge mechanism (35) is provided on the drying cylinder (31). The discharge mechanism (35) includes a discharge port (351) corresponding to a plurality of support trays (32) and a first sealing component for controlling the open and closed state of the discharge port (351). The material feeding mechanism (36) includes a discharge hole (361) located on the rising side of the support tray (32) and a second sealing component for controlling the sealing state of the discharge hole (361); Multiple support trays (32) are fixedly installed between the inner wall of the cylinder (2) and the outer wall of the drying cylinder (31), and guide plates (341) are located below them. A transfer cavity (34) is formed between two adjacent guide plates (341). The guide plates (341) receive the material flowing out through the upper discharge port (351) and guide the material through the lower discharge hole (361). A gas circulation component installed inside the body (1) to input dry high-temperature gas into the bottom of the drying cylinder (31) and extract gas from the top of the drying cylinder (31).

2. The injection molding equipment for recycling plastics according to claim 1, characterized in that, The first sealing assembly includes a first sealing ring (352) that is slidably installed on the outside of the drying cylinder (31) and corresponds one-to-one with the discharge port (351). Two adjacent first sealing rings (352) are fixedly connected by multiple first connecting rods (353). A first synchronization plate (354) is fixedly installed on the multiple first connecting rods (353) at the bottom. A first cylinder (355) whose output shaft is fixedly connected to the first synchronization plate (354) is fixedly installed inside the machine body (1).

3. The injection molding equipment for recycling plastics according to claim 2, characterized in that, The second sealing assembly includes multiple second sealing rings (362) that are slidably installed on the outside of the drying cylinder (31) and correspond one-to-one with the discharge holes (361). The multiple second sealing rings (362) are fixedly connected by multiple second connecting rods (363). The bottom of the multiple second connecting rods (363) is fixedly connected by a second synchronization plate (364). A second cylinder (365) is fixedly installed inside the machine body (1). The output shaft of the second cylinder (365) is fixedly connected to the second synchronization plate (364).

4. The injection molding equipment for recycling plastics according to claim 3, characterized in that, An air blowing ring (37) is fixedly installed on the inner wall of the cylinder (2) and in the transfer cavity (34). The air blowing ring (37) has multiple air blowing holes (371) arranged in a circular array. The air blowing ring (37) is connected to an air source.

5. The injection molding equipment for recycling plastics according to claim 4, characterized in that, A vibrator is fixedly installed on the cylinder (2), and the vibrator drives the cylinder (2) to vibrate at high frequency.

6. The injection molding equipment for recycling plastics according to claim 5, characterized in that, The drive mechanism (4) includes a transmission shaft (41) rotatably mounted on the drying cylinder (31) and the machine body (1). A motor (42) is fixedly mounted on the machine body (1). The output shaft of the motor (42) is fixedly connected to the transmission shaft (41). A plurality of the bearing trays (32) are fixedly connected to the transmission shaft (41).

7. The injection molding equipment for recycling plastics according to claim 6, characterized in that, The drying cylinder (31) is equipped with a pore maintenance component (6), which includes a filter (61) fixedly installed inside the drying cylinder (31) and corresponding one-to-one with the support tray (32) and located below it, and a backflushing cleaning component for backflushing the material adhering to the filter (61).

8. The injection molding equipment for recycling plastics according to claim 7, characterized in that, The backflushing cleaning assembly includes a backflushing box (62) fixedly installed on the drive shaft (41). The backflushing box (62) is provided with an air box (621) connected to an external air source. The bottom of the backflushing box (62) is provided with multiple backflushing holes (622). A guide plate (63) located directly below the backflushing box (62) is fixedly installed on the drive shaft (41). The guide plate (63) is provided with a guide groove (631). The guide groove (631) is provided with an upturned part (632). A baffle (64) located in the extension direction of the upturned part (632) is fixedly installed on the guide plate (63). The drive shaft (41) is provided with an air supply hole (65), and a connector (66) for connecting to an external air source is fixedly installed on the cylinder (2). An air pipe (67) is fixedly installed at one end of the connector (66), and the other end of the air pipe (67) is connected to the bottom of the drive shaft (41) through a rotating joint (68).

9. The injection molding equipment for recycling plastics according to claim 8, characterized in that, The gas circulation component includes an air inlet pipe (5) fixedly installed at the bottom of the cylinder (2). A flow guide (52) is fixedly installed inside the cylinder (2). The flow guide (52) is connected to the interior of the drying cylinder (31). An exhaust pipe (51) is provided at the top of the cylinder (2). The exhaust pipe (51) is connected in sequence to a cooling device for cooling the gas and a heating device for heating the gas. The outlet of the heating device is connected to the air inlet pipe (5).

10. The injection molding equipment for recycling plastics according to claim 1, characterized in that, The top of the drying cylinder (31) is fixedly installed with a feed pipe (7) and the bottom is fixedly installed with a discharge pipe (71). The cylinder body (2) is provided with a support plate (342) that supports the bottom of the drying cylinder (31). The support plate (342) is provided with multiple discharge holes (343).

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