Injection molding equipment for recycled plastic processing

Abstract

The invention relates to the technical field of plastic processing equipment, in particular to injection molding equipment for recycled plastic processing. According to the technical scheme, the drying machine comprises a machine body, a barrel fixedly installed in the machine body and a grading drying component installed in the barrel, the grading drying component comprises a drying barrel fixedly installed in the barrel, a plurality of bearing discs are rotatably installed in the drying barrel, a plurality of air holes are formed in the bearing discs, and the air holes are communicated with the drying barrel. A containing cavity is formed between every two adjacent bearing discs, and the grading drying component controls materials in the upper containing cavity to move to the lower containing cavity in sequence. The humidity gradient is broken through dynamic displacement, the air cylinder is in linkage with the multiple layers of first blocking rings to open the discharging opening, under the action of the rotating centrifugal force of the bearing disc, high-humidity materials on the top move downwards to a high-temperature drying area layer by layer, the materials are subjected to a progressive drying path of high humidity and low temperature, medium humidity and medium temperature and low humidity and high temperature, and the moisture content range of the top layer / bottom layer is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic processing equipment, in particular to an injection molding equipment for processing recycled plastics. Background Art

[0002] In the operating system of recycled plastic processing injection molding equipment, the plastic drying cylinder, as the core pretreatment device, forms a tight process closed loop with the injection molding machine. The injection molding equipment melts the recycled plastic particles into shape through high temperature and high pressure. However, the recycled materials often carry 2% to 5% moisture due to the crushing and cleaning process. If they directly enter the injection molding machine screw, the moisture will vaporize at high temperature and cause melt bubbles, silver streaks and even hydrolysis degradation. At this time, the core role of the drying cylinder is highlighted: it introduces deep dry hot air with a dew point of ≤-40°C from the bottom, penetrates the recycled plastic layer from bottom to top, and reduces the moisture content to below 0.005% within 6 to 8 hours. The dried particles are accurately fed into the injection molding machine hopper through the pneumatic valve at the bottom, which not only ensures the purity of the melt, but also reduces the injection molding energy consumption by preheating the particles.

[0003] After the gas enters the bottom of the drying cylinder, as it penetrates upward through the layer of recycled plastic particles, due to the mass transfer equilibrium of water molecules between the gas and solid phases, the airflow will continue to absorb moisture from the surface of the plastic particles, causing the absolute humidity of the airflow itself to accumulate and increase step by step along the height of the cylinder. At the same time, as the gas rises, its temperature gradually decreases due to heat transfer to the plastic particles, which causes the relative humidity of the airflow to rise further sharply - in the top area, the relative humidity can reach more than twice that of the bottom. When the hot and humid gas reaches the top layer of material, the mass transfer driving force for the diffusion of moisture from the interior of the plastic to the surface is significantly weakened due to the significant reduction in the gas-water potential difference. In addition, the irregular shape of the recycled plastic forms a denser material layer structure on the top layer, further hindering the penetration of airflow. This dual effect causes the top layer of material to always be in a harsh drying environment of "high humidity and low temperature", with a moisture content that can be higher than that of the bottom layer, forming a drying dead zone that is difficult to eliminate. Summary of the Invention

[0004] The purpose of the present invention is to address the problems existing in the background technology and to propose an injection molding device for recycling plastic processing that can gradually move the top plastic downward to prevent the formation of a dry dead zone.

[0005] The technical solution of the present invention is: an injection molding device for recycling plastic processing, comprising a cylinder body fixedly installed in the body, and further comprising:

[0006] A graded drying component is installed inside the cylinder, the graded drying component includes a drying cylinder fixedly installed inside the cylinder, a plurality of trays are rotatably installed in the drying cylinder, the trays are provided with a plurality of air holes, and a receiving cavity is formed between two adjacent trays. The graded drying component controls the material in the upper receiving cavity to move to the lower receiving cavity in sequence;

[0007] A driving mechanism installed on the machine body and driving the plurality of trays to rotate;

[0008] A discharge mechanism provided on the drying cylinder, the discharge mechanism comprising discharge openings corresponding one-to-one to the plurality of trays and a first blocking component for controlling the open and close state of the discharge openings;

[0009] A discharge mechanism, the discharge mechanism comprising a discharge hole corresponding to the support tray and located on the rise thereof, and a second blocking component for controlling a blocking state of the discharge hole;

[0010] A plurality of guide plates are fixedly installed between the inner wall of the cylinder and the outer wall of the drying cylinder, corresponding to the trays one by one and located below the trays. 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 in 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 slidably mounted on the outside of the drying cylinder and corresponding one-to-one to the discharge port. Two adjacent first sealing rings are fixedly connected by multiple first connecting rods. A first synchronization plate is fixedly mounted on the multiple first connecting rods located at the bottom. A first cylinder with an output shaft fixedly connected to the first synchronization plate is fixedly mounted in the machine body.

[0013] Optionally, the second sealing assembly includes a plurality of second sealing rings slidably mounted on the outside of the drying cylinder and corresponding one-to-one to the discharge holes, the plurality of second sealing rings are fixedly connected by a plurality of second connecting rods, the bottoms of the plurality of second connecting rods are fixedly connected by a second synchronization plate, a second cylinder is fixedly mounted in the 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 a plurality of air blowing holes in a circumferential array, and the interior of the air blowing ring is connected to an air source.

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

[0016] Optionally, the driving mechanism includes a transmission shaft rotatably mounted on the drying cylinder and the machine body, a motor is fixedly mounted on the machine body, an output shaft of the motor is fixedly connected to the transmission shaft, and a plurality of the supporting trays are fixedly connected to the transmission shaft.

[0017] Optionally, an air hole maintenance component is installed in the drying cylinder, and the air hole maintenance component includes a filter fixedly installed in the drying cylinder and corresponding to the support tray and located below it, and a backflushing cleaning component for backflushing the contaminated material on the filter.

[0018] Optionally, the backflush cleaning component includes a backflush box fixedly mounted on the transmission shaft, an air box is provided in the backflush box, the air box is connected to an external air source, a plurality of backflush holes are provided at the bottom of the backflush box, a guide plate is fixedly mounted on the transmission shaft and is located directly below the backflush box, the guide plate is provided with a guide groove, the guide groove is provided with an upturned portion, and a baffle is fixedly mounted on the guide plate and is located in the direction of the extension line of the upturned portion;

[0019] An air delivery hole is provided in the transmission shaft, a connector connected to an external air source is fixedly mounted on the cylinder, an air pipe is fixedly mounted on one end of the connector, and the other end of the air pipe is connected to the bottom of the transmission shaft through a rotating joint.

[0020] Optionally, the gas circulation component includes an air inlet pipe fixedly mounted on the bottom of the cylinder, a flow guide cover fixedly mounted inside the cylinder, the flow guide cover is connected to the interior of the drying cylinder, an exhaust pipe is provided on the top of the cylinder, the exhaust pipe is connected in sequence to a cooling device for cooling the gas and a heating device for heating the gas, and the air outlet of the heating device is connected to the air inlet pipe.

[0021] Optionally, a feed pipe is fixedly installed on the top of the drying cylinder, and a discharge pipe is fixedly installed on the bottom. A support plate for supporting the bottom of the drying cylinder is provided in the cylinder body, and a plurality of discharge holes are provided on the support plate.

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

[0023] The present invention uses dynamic displacement to break the humidity gradient. The discharge port is opened by linking the multi-layer first blocking ring with an air cylinder. Under the action of the centrifugal force of the rotating tray, the top high-humidity material is moved down layer by layer to the high-temperature drying area. The material undergoes a progressive drying path of high humidity and low temperature → medium humidity and medium temperature → low humidity and high temperature, thereby reducing the extreme difference in moisture content between the top and bottom layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of injection molding equipment for recycling plastics processing Figure 1 ;

[0025] Figure 2 Schematic diagram of the structure of injection molding equipment for recycling plastics processing Figure 2 ;

[0026] Figure 3 It is a structural diagram of the cylinder;

[0027] Figure 4 Schematic diagram of the structure inside the cylinder;

[0028] Figure 5 It is a structural diagram of the graded drying component;

[0029] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0030] Figure 7 Schematic diagram of the structure of the support plate;

[0031] Figure 8 Schematic diagram of the position of the discharge port and the discharge hole;

[0032] Figure 9 Schematic diagram of the position distribution of the first blocking ring;

[0033] Figure 10 It is a structural schematic diagram of the first synchronization board and the second synchronization board;

[0034] Figure 11 Schematic diagram of the internal structure of the transmission shaft;

[0035] Figure 12 for Figure 11 A partial enlarged view of point B in the middle;

[0036] Figure 13 It is a structural diagram of the supporting tray;

[0037] Figure 14 Schematic diagram of the structure of the filter;

[0038] Figure 15 It is a structural diagram of the air hole maintenance component;

[0039] Figure 16 It is a structural diagram of the backflush box and guide plate.

[0040] Reference numerals: 1, machine body; 2, cylinder; 3, graded drying component; 31, drying cylinder; 32, tray; 321, air hole; 33, accommodating chamber; 34, transfer chamber; 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 , second synchronization plate; 365, second cylinder; 37, air blowing ring; 371, air blowing hole; 4, driving mechanism; 41, transmission shaft; 42, motor; 5, air inlet pipe; 51, exhaust pipe; 52, air guide cover; 6, air hole maintenance component; 61, filter; 62, back-blowing box; 621, air box; 622, back-blowing hole; 63, guide plate; 631, guide groove; 632, upturned part; 64, baffle; 65, air delivery hole; 66, connector; 67, air pipe; 68, rotating joint; 7, feed pipe; 71, discharge pipe. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is 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 device for recycling plastic processing, including a body 1 fixedly installed in the body 1, a cylinder 2, and a graded drying component 3 installed inside the cylinder 2. The graded drying component 3 can transport plastic fragments from the top to the bottom in sequence, thereby preventing the problem of incomplete dehumidification at the top, increasing the overall drying efficiency, and reducing energy consumption. The graded drying component 3 includes a drying cylinder 31 fixedly installed inside the cylinder 2, and a plurality of supporting trays 32 are rotatably installed in the drying cylinder 31. The supporting trays 32 are provided with a plurality of air holes 321. The supporting trays 32 are used to support plastic fragments. Gas can flow upward through the supporting trays 32 through the air holes 321, and a receiving chamber 33 is formed between two adjacent supporting trays 32. By providing a plurality of supporting trays 32, a plurality of receiving chambers 33 can be formed. The plastic inside the lower receiving chamber 33 will be dried first. After the plastic inside the bottom receiving chamber 33 is dried, the plastic will be discharged and the upper plastic will be transported to the bottom, so that the plastic can flow from top to bottom in the drying cylinder 31 in sequence, which can effectively increase the drying efficiency.

[0043] As an implementation method, Figures 4 to 10 and Figure 13As shown, the injection molding equipment of this embodiment also includes a discharge mechanism 35 provided on the drying cylinder 31. The discharge mechanism 35 includes a discharge port 351 corresponding one-to-one to a plurality of receiving trays 32 and a first blocking component for controlling the open and closed state of the discharge port 351. When the discharge port 351 is opened, the receiving tray 32 is rotated to rotate the plastic inside the accommodating cavity 33 so that the plastic can be thrown out through the discharge port 351 under centrifugal force.

[0044] Furthermore, the injection molding equipment also includes a discharge mechanism 36, which includes a discharge hole 361 located at the rising end corresponding to the receiving tray 32 and a second blocking component that controls the blocking state of the discharge hole 361, wherein a plurality of guide plates 341 corresponding to the receiving tray 32 and located below the receiving tray 32 are fixedly installed between the inner wall of the cylinder 2 and the outer wall of the drying cylinder 31, and a transfer chamber 34 is formed between two adjacent guide plates 341. The guide plate 341 receives the material flowing out through the upper discharge port 351 and guides the material through the lower discharge hole 361. The plastic discharged through the discharge port 351 will enter the interior of the transfer chamber 34 and fall on the guide plate 341. The guide plate 341 is provided with an inclined surface, which will move the plastic in the direction close to the discharge hole 361 under the action of the inclined surface, so that the plastic can pass through the discharge hole 361 into the lower accommodating chamber 33, thereby completing the transfer of the plastic.

[0045] A support plate 342 is provided inside the cylinder 2 to support the bottom of the drying cylinder 31. A plurality of discharge holes 343 are provided on the support plate 342. The plastic above is transferred multiple times and finally moves to the inside of the accommodating cavity 33 at the bottom layer, and finally enters the gap between the cylinder 2 and the drying cylinder 31 through the discharge port 351 at the bottom layer, and falls downward under the action of gravity, and is finally discharged through the discharge hole 343.

[0046] Furthermore, the first blocking assembly includes a first blocking ring 352 that is slidably mounted on the outside of the drying cylinder 31 and corresponds one-to-one to the discharge port 351. Two adjacent first blocking rings 352 are fixedly connected by multiple first connecting rods 353. A first synchronization plate 354 is fixedly mounted 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 mounted in the body 1. The first synchronization plate 354 can be driven to move up and down by the first cylinder 355, so that the multiple first connecting rods 353 can be moved and lifted. When the first connecting rod 353 rises, it will drive the first blocking ring 352 to rise, and the rising first blocking ring 352 will be misaligned with the discharge port 351. At this time, the first blocking ring 352 will not block the plastic, so that the plastic can be discharged into the transfer chamber 34 through the discharge port 351.

[0047] Furthermore, the second blocking assembly includes a plurality of second blocking rings 362 slidably mounted on the outside of the drying cylinder 31 and corresponding to the discharge holes 361 one by one. The plurality of second blocking rings 362 are fixedly connected by a plurality of second connecting rods 363. The bottoms of the plurality of second connecting rods 363 are fixedly connected by a second synchronous plate 364. A second cylinder 365 is fixedly mounted in the body 1. 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, and the second synchronous plate 364 is driven to rise by the second cylinder 365. The rising second synchronous plate 364 can drive the multiple second connecting rods 363 to move synchronously, so that the second blocking ring 362 is raised, and the discharge hole 361 can be opened. At this time, the plastic inside the transfer chamber 34 can slide out and enter the receiving groove below. Then, the second blocking ring 362 is driven by the second cylinder 365 to block the discharge hole 361, and the whole process of transferring the plastic inside the upper receiving chamber 33 to the lower receiving chamber 33 can be completed.

[0048] Among them, an air blowing ring 37 is fixedly installed on the inner wall of the cylinder 2 and located in the transfer chamber 34. There are multiple air blowing holes 371 in a circular array on the air blowing ring 37. The inside of the air blowing ring 37 is connected to the air source. The external air source conveys high-pressure gas to the inside of the air blowing ring 37. The high-pressure gas will be discharged through the air blowing holes 371, and the plastic located inside the transfer chamber 34 can be blown to quickly discharge the plastic inside the transfer chamber 34 to prevent material jamming inside the transfer chamber 34. A vibrator is fixedly installed on the cylinder 2, and the vibrator drives the cylinder 2 to vibrate at a high frequency. By vibrating the drying cylinder 31 and the supporting tray 32, the plastic can be evenly dispersed on the supporting tray 32, and the transfer speed of the plastic can be increased.

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

[0050] As an implementation method, Figures 3 to 5As shown, the injection molding equipment of this embodiment also includes a gas circulation component installed in the machine body 1 and inputting dry high-temperature gas to the bottom of the drying cylinder 31 and extracting 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 2, and a flow guide hood 52 fixedly installed in the cylinder 2. The flow guide hood 52 is connected to the interior of the drying cylinder 31. The gas is input into the flow guide hood 52 through the air inlet pipe 5 and enters the interior of the drying cylinder 31 under the action of the flow guide hood 52. The gas will not affect the space between the drying cylinder 31 and the cylinder 2. The space is a channel for the downward transfer of the plastic, which can prevent the plastic from being affected by the lift of the gas when moving downward. 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 air 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 the multiple air holes 321 from bottom to top through the multiple accommodating cavities 33 and is finally discharged through the exhaust pipe 51. The cooling device and the heating device are existing technologies and are not described here.

[0051] like Figures 11 to 16 As shown, in this embodiment, an air hole maintenance component 6 is installed in the drying cylinder 31. The air hole maintenance component 6 includes a filter 61 fixedly installed in the drying cylinder 31 and corresponding to the supporting tray 32 and located below it, and a backwash cleaning component for backblowing the contaminated material on the filter 61. Plastic is generally placed in the accommodating cavity 33 in the form of fragments, and the air flow will drive the broken fragments to rise when rising. The rising broken fragments can easily block the air holes 321, resulting in the inability of the air flow to be effectively transmitted upward. At this time, the air hole maintenance component 6 can prevent this problem from occurring.

[0052] Furthermore, the backflush cleaning component includes a backflush box 62 fixedly mounted on the transmission shaft 41, an air box 621 is provided in the backflush box 62, the air box 621 is connected to the external air source, a plurality of backflush holes 622 are provided at the bottom of the backflush box 62, and a guide plate 63 is fixedly mounted on the transmission shaft 41, which is located directly below the backflush box 62. The guide plate 63 is provided with a guide groove 631, and the guide groove 631 is provided with an upturned portion 632. The plastic debris driven up by the rising air flow will be blocked by the filter 61 and will be adsorbed on the filter 61. At this time, the transmission shaft is driven by the motor 42. 41 is slowly rotated, which can drive the back-blowing box 62 and the guide plate 63 to rotate synchronously, and inject high-pressure gas into the back-blowing box 62, so that the gas can be ejected through the back-blowing hole 622 and back-blown against the filter 61, so that the broken fragments adhered to the filter 61 can move downward and enter the guide plate 63. The setting of the upturned portion 632 can prevent the rising air flow in the drying cylinder 31 from directly entering the guide plate 63, thereby preventing air flow interference and reducing the air pressure value in the back-blowing box 62, thereby achieving the purpose of reducing energy consumption.

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

[0054] Among them, the transmission shaft 41 is provided with a gas hole 65, and a connector 66 connected to the external gas 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 transmission shaft 41 through a rotary joint 68. The backflush box 62 is connected to the gas hole 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 gas hole 65.

[0055] like Figures 2 to 5 As shown, in this embodiment, a feed pipe 7 is fixedly installed on the top of the drying cylinder 31, and a discharge pipe 71 is fixedly installed on the bottom. The plastic discharged through the bottom accommodating chamber 33 will move downward and enter the inside of the discharge pipe 71, and finally be discharged through the discharge pipe 71. The plastic is input into the inside of the accommodating chamber 33 at the top through the feed pipe 7, and automatic loading and unloading can be completed. 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 accommodating chamber 33 of the drying cylinder 31 through the top feed pipe 7, and the transmission shaft 41 is driven to rotate by the motor 42 of the driving mechanism 4, so that the multi-layer support trays 32 rotate synchronously; the drying gas is input from the bottom of the drying cylinder through the air inlet pipe 5 and the guide cover 52 of the gas circulation component, and penetrates the accommodating chamber 33 of each layer from bottom to top through the air holes 321 of the support tray and is discharged from the exhaust pipe 51. In this process, the air flow forms a humidity gradient due to the adsorption of moisture - the top area is prone to form a drying dead zone due to the low temperature and high humidity environment. To solve this problem, the equipment dynamically adjusts the material position through the graded drying component 3: when a layer of material is dried to the standard, the first cylinder 355 links the first sealing ring 352 to open the discharge port 351, and the rotating support tray 32 throws 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 toward the discharge hole 361. At this time, the second cylinder 365 drives the second sealing ring 362 to open the discharge hole. The material falls accurately into the lower accommodating chamber 33 with the assistance of the high-pressure airflow of the air blowing ring 37 and the high-frequency vibration of the cylinder 2, realizing the periodic transfer of the 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 to the filter 61 through the back-blowing box 62 to remove the debris blocking the air hole 321 and rebound through the guide groove 631 and the baffle 64 to ensure smooth air flow. Finally, the dried plastic passes through the discharge hole 343 through the discharge pipe 71 through the bottom discharge port 351 to the injection molding main unit, forming a continuous drying-injection molding closed loop, completely eliminating the uneven moisture content problem caused by static drying, and greatly improving the 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 inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An injection molding device for processing recycled plastics, comprising a body (1) and a barrel (2) fixedly mounted in the body (1), characterized in that: Also includes: A graded drying component (3) is installed inside the cylinder (2), the graded drying component (3) comprising a drying cylinder (31) fixedly installed inside the cylinder (2), a plurality of trays (32) being rotatably installed inside the drying cylinder (31), a plurality of air holes (321) being provided on the trays (32), a receiving cavity (33) being formed between two adjacent trays (32), and the graded drying component (3) controls the material inside the upper receiving cavity (33) to move to the lower receiving cavity (33) in sequence; A driving mechanism (4) mounted on the machine body (1) and driving the plurality of support trays (32) to rotate; A discharge mechanism (35) is provided on the drying cylinder (31), the discharge mechanism (35) comprising discharge openings (351) corresponding one-to-one to the plurality of support trays (32) and a first blocking component for controlling the open and closed state of the discharge openings (351); A discharge mechanism (36), the discharge mechanism (36) comprising a discharge hole (361) corresponding to the support tray (32) and located on the upper portion thereof, and a second blocking component for controlling the blocking state of the discharge hole (361); A plurality of support trays (32) are fixedly installed between the inner wall of the cylinder (2) and the outer wall of the drying cylinder (31), and a guide plate (341) is located below the support trays (32), and 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 is installed in the machine body (1) and inputs dry high-temperature gas to the bottom of the drying cylinder (31) and extracts it 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 blocking assembly comprises a first blocking ring (352) slidably mounted on the outside of the drying cylinder (31) and corresponding to the discharge port (351) one by one, two adjacent first blocking rings (352) are fixedly connected via a plurality of first connecting rods (353), a first synchronization plate (354) is fixedly mounted on the plurality of first connecting rods (353) at the bottom, and a first cylinder (355) is fixedly mounted in the machine body (1) with an output shaft fixedly connected to the first synchronization plate (354).

3. The injection molding equipment for recycling plastics according to claim 2, characterized in that: The second blocking assembly includes a plurality of second blocking rings (362) slidably mounted on the outside of the drying cylinder (31) and corresponding one-to-one to the discharge holes (361); the plurality of second blocking rings (362) are fixedly connected via a plurality of second connecting rods (363); the bottoms of the plurality of second connecting rods (363) are fixedly connected via a second synchronization plate (364); a second cylinder (365) is fixedly mounted in the machine body (1); and an 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 located in the transfer cavity (34). A plurality of air blowing holes (371) are arranged in a circumferential array on the air blowing ring (37). The interior of 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 mounted on the cylinder (2), and the vibrator drives the cylinder (2) to vibrate at a high frequency.

6. The injection molding equipment for recycling plastics according to claim 5, characterized in that: The driving mechanism (4) comprises 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); an output shaft of the motor (42) is fixedly connected to the transmission shaft (41); and a plurality of the supporting 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: An air hole maintenance component (6) is installed in the drying cylinder (31), and the air hole maintenance component (6) includes a filter (61) fixedly installed in the drying cylinder (31) and corresponding to the support tray (32) and located below the support tray (32) and a backflushing cleaning component for backflushing contaminated materials on the filter (61).

8. The injection molding equipment for processing recycled plastics according to claim 7, characterized in that: The backwash cleaning component comprises a backwash box (62) fixedly mounted on the transmission shaft (41), an air box (621) is provided in the backwash box (62), the air box (621) is connected to an external air source, a plurality of backwash holes (622) are provided at the bottom of the backwash box (62), a guide plate (63) is fixedly mounted on the transmission shaft (41) and is located directly below the backwash box (62), the guide plate (63) is provided with a guide groove (631), the guide groove (631) is provided with an upturned portion (632), and a baffle (64) is fixedly mounted on the guide plate (63) and is located in the extension line direction of the upturned portion (632); An air delivery hole (65) is provided in the transmission shaft (41), a connector (66) connected to an external air source is fixedly mounted on the cylinder (2), an air pipe (67) is fixedly mounted on one end of the connector (66), and the other end of the air pipe (67) is connected to the bottom of the transmission shaft (41) via a rotary joint (68).

9. The injection molding equipment for processing recycled plastics according to claim 8, characterized in that: The gas circulation component comprises an air inlet pipe (5) fixedly mounted on the bottom of the cylinder (2); a flow deflector (52) is fixedly mounted inside the cylinder (2); the flow deflector (52) is communicated with the interior of the drying cylinder (431); an exhaust pipe (51) is provided at the top of the cylinder (2); the exhaust pipe (51) is sequentially connected to a cooling device for cooling the gas and a heating device for heating the gas; the air outlet of the heating device is communicated with the air inlet pipe (5).

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

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