Complex mixed plastic sorting device and sorting method thereof

Abstract

The invention belongs to the technical field of plastic sorting, and discloses a complex mixed plastic sorting device and a sorting method.The complex mixed plastic sorting device comprises a sorting box, a separation cavity and a storage cavity are formed in the sorting box, a separation assembly is arranged at the top of the separation cavity, a mixing shaft is rotationally installed in the separation cavity, and mixing blades are evenly installed on the outer wall of the mixing shaft; a first motor is arranged at one end of the mixing shaft, a liquid discharging pipe is fixedly installed on the side wall of the sorting box, a ball valve is installed in the liquid discharging pipe, and when light-density complex mixed plastic on the top of the separation cavity needs to be separated from the separation cavity, a second motor is started, and when the second motor is started, a first threaded rod is driven to rotate; the first threaded rod rotates to drive the push plate to move, the push plate pushes the light-density plastic on the top of the separation cavity to one side of the storage cavity, separation of the light-density plastic is facilitated, the separation structure of the device is small in occupied space, liquid flowing during plastic mixing is not affected, and therefore the separation efficiency of complex mixed plastic is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic sorting, and in particular relates to a complex mixed plastic sorting device and a sorting method thereof. Background Art

[0002] Complex mixed plastics usually refer to materials that are mixed with multiple different types of plastics. These plastics may include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyethylene terephthalate (PET), etc. Due to the different chemical structures and physical properties of these plastics, the recycling and treatment of mixed plastics becomes very complicated;

[0003] The complex mixed plastic sorting device is a device used to separate different types of plastics in mixed plastics, and the separation tank is a common complex mixed plastic sorting device. The separation tank is a common device in the complex mixed plastic sorting device. Its working principle is to put mixed plastic particles or fragments into the separation tank. Through the buoyancy of water, plastics with lower density will float on the water surface, while plastics with higher density will sink to the bottom of the water, thereby achieving preliminary separation;

[0004] In the process of using separation tanks to sort complex mixed plastics, the plastics first need to be cleaned and crushed, and then the processed plastics are put into the separation tank to mix with the liquid. After static separation, some plastics are salvaged manually, which is less efficient, while others are salvaged mechanically. Although this can improve separation efficiency, the presence of the mechanical structure will occupy space in the separation tank, which may cause uneven liquid flow when mixing plastics, forming dead zones, further affecting the sorting efficiency. Summary of the invention

[0005] The object of the present invention is to provide a complex mixed plastic sorting device and a sorting method thereof to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a complex mixed plastic sorting device, comprising a sorting box, a separation chamber and a storage chamber are provided inside the sorting box, a separation assembly is provided on the top of the separation chamber, a mixing shaft is rotatably installed inside the separation chamber, mixing blades are evenly installed on the outer wall of the mixing shaft, a first motor is provided at one end of the mixing shaft, a drain pipe is fixedly installed on the side wall of the sorting box, and a ball valve is installed inside the drain pipe;

[0007] The separation assembly includes a push plate arranged on the top of the separation chamber, the inner wall of one side of the push plate is threadedly connected with a first threaded rod, the first threaded rod is rotatably installed inside the sorting box, and a second motor is arranged at one end of the first threaded rod.

[0008] As a further technical solution of the present invention, a first control plate is arranged between the separation chamber and the storage chamber, one side of the first control plate is fixedly connected to a rack plate, one side of the rack plate is meshingly connected to a transmission gear, and the transmission gear is fixedly installed at one end of the first threaded rod.

[0009] As a further technical solution of the present invention, tooth blocks are provided at both ends of the rack plate, connecting shafts are slidably installed on the inner walls of the two tooth blocks, springs are sleeved on the outer walls of the connecting shafts, and a fixed block is fixedly connected to the end of the connecting shaft away from the tooth block, and the fixed block is fixedly installed on the outer wall of the rack plate.

[0010] As a further technical solution of the present invention, a second control plate is provided on one side of the bottom of the separation chamber, the second control plate is slidably installed inside the sorting box, the top of the second control plate is threadedly connected with a second threaded rod, the top of the second threaded rod is fixedly installed with a first bevel gear, one side of the first bevel gear is meshedly connected with a second bevel gear, and one side of the second bevel gear is fixedly installed with a rotating shaft.

[0011] As a further technical solution of the present invention, a convex plate is fixedly installed on one side of the push plate.

[0012] As a further technical solution of the present invention, the inner walls of the push plate and the convex plate are both provided with filter holes, and the filter holes are evenly distributed.

[0013] As a further technical solution of the present invention, a second filter plate is arranged inside the storage cavity.

[0014] As a further technical solution of the present invention, a collecting frame is provided at the top of the second filter plate, and the collecting frame is slidably installed inside the storage cavity.

[0015] As a further technical solution of the present invention, a first filter plate is arranged at the bottom of the separation chamber, and the first filter plate is arranged on one side of the second control plate.

[0016] A sorting method of a complex mixed plastic sorting device comprises the following steps:

[0017] S1: When it is necessary to separate complex mixed plastics, firstly, a sufficient amount of separation liquid is placed inside the separation chamber, and then the crushed and cleaned complex mixed plastics are put into the separation chamber, and the first motor is started. When the first motor is started, the mixing shaft is driven to rotate, and the rotation of the mixing shaft drives the mixing blades to rotate to mix the complex mixed plastics. After mixing for a period of time, the mixing blades are stopped, so that the plastics with lower density float up and the plastics with higher density sink to the bottom;

[0018] S2: Then start the second motor, which drives the first threaded rod to rotate. The rotation of the first threaded rod drives the push plate to move, so that the push plate pushes the light-density plastic on the top of the separation chamber to one side of the storage chamber;

[0019] At the same time, the rotation of the first threaded rod drives the transmission gear, the rotation of the transmission gear drives the movement of the rack plate, and the movement of the rack plate drives the first control plate to move downward to open the first discharge port;

[0020] At the same time, the movement of the push plate drives the movement of the convex plate, so that the convex plate moves toward one side of the first control plate. When the convex plate moves to one side of the first control plate and continues to move, the light-density plastic is pushed upward from the first discharge port to the inside of the storage cavity, and the liquid inside the light-density plastic is discharged to the bottom through the collection frame and the second filter plate;

[0021] S3: After the light-density plastic is pushed into the storage chamber, the first threaded rod is controlled to reverse. Similarly, the rotation of the first threaded rod drives the rotation of the transmission gear, and the rotation of the transmission gear drives the rack plate to move up. The movement of the rack plate drives the first control plate to move to close the first discharge port.

[0022] S4: Then the drain pipe is opened through the ball valve to discharge the liquid inside the separation chamber and the storage chamber;

[0023] S5: After the liquid is discharged, the rotating shaft is rotated again. The rotation of the rotating shaft drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the first bevel gear. The rotation of the first bevel gear drives the rotation of the second threaded rod. The rotation of the second threaded rod drives the second control plate to move up to open the second discharge port, so that the high-density plastic at the bottom of the separation chamber is discharged, thereby completing the separation of complex mixed plastics.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention sets a separation component. When it is necessary to separate complex mixed plastics, firstly, a sufficient amount of separation liquid is placed inside the separation chamber, and then the crushed and cleaned complex mixed plastics are put into the separation chamber, and the first motor is started. When the first motor is started, it drives the rotation of the mixing shaft. The rotation of the mixing shaft drives the mixing blades to rotate to mix the complex mixed plastics. After mixing for a period of time, the motor stops, so that the plastic with lower density floats up and the plastic with higher density sinks to the bottom. When it is necessary to separate the complex mixed plastic with lighter density at the top of the separation chamber from the separation chamber, the second motor is started. When the second motor is started, it drives the rotation of the first threaded rod. The rotation of the first threaded rod drives the movement of the push plate, so that the push plate pushes the light-density plastic at the top of the separation chamber to one side of the storage chamber for easy separation. The separation structure of the device occupies a small space and does not affect the flow of liquid when mixing plastics, thereby ensuring the sorting efficiency of complex mixed plastics.

[0026] 2. The present invention sets a control plate. When pushing light-density plastic, the rotation of the first threaded rod drives the transmission gear. The rotation of the transmission gear drives the movement of the rack plate. The movement of the rack plate drives the first control plate to move downward, opening the first discharge port to facilitate the light-density plastic to enter the storage chamber for storage.

[0027] 3. The present invention adopts the arrangement of the tooth block. When the transmission gear rotates to drive the rack plate to move downward so that the first control plate opens the first discharge port, the transmission gear continues to rotate and engages with the tooth block. The elastic potential energy of the connecting shaft makes the tooth block always have a tendency to move upward, so that the first control plate no longer continues to move downward. In the process of pushing the light-density plastic, the first discharge port remains open. When the pushing is completed, the transmission gear reverses and drives the rack plate to move up, so that the first control plate moves up to close the first discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0030] Figure 3 It is a cross-sectional schematic diagram of the sorting box of the present invention;

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0032] Figure 5 This is a schematic diagram of the structure of the push plate of the present invention;

[0033] Figure 6 This is a structural schematic diagram of the first control panel of the present invention;

[0034] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B in the middle.

[0035] In the figure: 1, sorting box; 2, separation chamber; 3, mixing shaft; 4, mixing blade; 5, first motor; 6, drain pipe; 7, ball valve; 8, push plate; 9, second motor; 10, first threaded rod; 11, storage chamber; 12, first control board; 13, rack plate; 14, transmission gear; 15, gear block; 16, connecting shaft; 17, fixed block; 18, spring; 19, convex plate; 20, first filter plate; 21, second control board; 22, second threaded rod; 23, first bevel gear; 24, second bevel gear; 25, rotating shaft; 26, second filter plate; 27, collecting frame; 28, filter hole. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figures 1 to 7 As shown, in an embodiment of the present invention, a complex mixed plastic sorting device comprises a sorting box 1, wherein a separation chamber 2 and a storage chamber 11 are provided inside the sorting box 1, a separation assembly is provided on the top of the separation chamber 2, a mixing shaft 3 is rotatably installed inside the separation chamber 2, mixing blades 4 are evenly installed on the outer wall of the mixing shaft 3, a first motor 5 is provided at one end of the mixing shaft 3, a drain pipe 6 is fixedly installed on the side wall of the sorting box 1, and a ball valve 7 is installed inside the drain pipe 6;

[0038] The separation assembly includes a push plate 8 arranged on the top of the separation chamber 2, and the inner wall of one side of the push plate 8 is threadedly connected with a first threaded rod 10, the first threaded rod 10 is rotatably installed inside the sorting box 1, and a second motor 9 is arranged at one end of the first threaded rod 10.

[0039] When it is necessary to separate complex mixed plastics, firstly, a sufficient amount of separation liquid is placed inside the separation chamber 2, and then the crushed and cleaned complex mixed plastics are put into the separation chamber 2, and the first motor 5 is started. When the first motor 5 is started, the mixing shaft 3 is driven to rotate, and the rotation of the mixing shaft 3 drives the mixing blades 4 to rotate to mix the complex mixed plastics. After mixing for a period of time, the mixing blades 4 are stopped, so that the plastics with lower density float up and the plastics with higher density sink to the bottom.

[0040] When it is necessary to separate the light-density complex mixed plastics at the top of the separation chamber 2 from the separation chamber 2, the second motor 9 is started. When the second motor 9 is started, it drives the first threaded rod 10 to rotate. The rotation of the first threaded rod 10 drives the push plate 8 to move, so that the push plate 8 pushes the light-density plastics at the top of the separation chamber 2 to one side of the storage chamber 11, so as to facilitate its separation.

[0041] The separation structure of the device occupies a small space and does not affect the flow of liquid when mixing plastics, thereby ensuring the sorting efficiency of complex mixed plastics.

[0042] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, a first control plate 12 is arranged between the separation chamber 2 and the storage chamber 11 , a rack plate 13 is fixedly connected to one side of the first control plate 12 , a transmission gear 14 is meshingly connected to one side of the rack plate 13 , and the transmission gear 14 is fixedly installed on one end of the first threaded rod 10 .

[0043] A first discharge port is provided between the separation chamber 2 and the storage chamber 11, and a first control panel 12 is provided in the first discharge port. The first discharge port is provided to be inclined upward.

[0044] When the light-density plastic is not pushed, the first control plate 12 is located in the first discharge port to block it, thereby preventing the liquid and plastic in the separation chamber 2 from entering the storage chamber 11 during the mixing process;

[0045] When pushing the light-density plastic, the rotation of the first threaded rod 10 drives the transmission gear 14, and the rotation of the transmission gear 14 drives the movement of the rack plate 13. The movement of the rack plate 13 drives the first control plate 12 to move downward, opening the first discharge port to facilitate the light-density plastic to enter the storage chamber 11 for storage.

[0046] like Figure 6 As shown, tooth blocks 15 are provided at both ends of the rack plate 13, and connecting shafts 16 are slidably installed on the inner walls of the two tooth blocks 15. Springs 18 are sleeved on the outer walls of the connecting shafts 16. One end of the connecting shaft 16 away from the tooth blocks 15 is fixedly connected to a fixing block 17, and the fixing block 17 is fixedly installed on the outer wall of the rack plate 13.

[0047] When the transmission gear 14 rotates to drive the rack plate 13 to move downward so that the first control plate 12 opens the first discharge port, the transmission gear 14 continues to rotate and meshes with the tooth block 15. The elastic potential energy of the connecting shaft 16 makes the tooth block 15 always have a tendency to move upward, so that the first control plate 12 no longer moves downward. In the process of pushing the light-density plastic, the first discharge port remains open.

[0048] When the material pushing is completed, the transmission gear 14 reverses and drives the rack plate 13 to move upward, so that the first control plate 12 moves upward to close the first discharging port.

[0049] like Figure 6 As shown, a second control plate 21 is provided on one side of the bottom of the separation chamber 2, and the second control plate 21 is slidably installed inside the sorting box 1. The top of the second control plate 21 is threadedly connected with a second threaded rod 22, and the top of the second threaded rod 22 is fixedly installed with a first bevel gear 23, one side of the first bevel gear 23 is meshingly connected with a second bevel gear 24, and one side of the second bevel gear 24 is fixedly installed with a rotating shaft 25.

[0050] A second discharge port is provided at the bottom of the separation chamber 2, and a second control plate 21 is provided in the second discharge port;

[0051] When it is necessary to discharge the plastic with higher density at the bottom of the separation chamber 2, the rotating shaft 25 is rotated. The rotation of the rotating shaft 25 drives the rotation of the second bevel gear 24. The rotation of the second bevel gear 24 drives the rotation of the first bevel gear 23. The rotation of the first bevel gear 23 drives the rotation of the second threaded rod 22. The rotation of the second threaded rod 22 drives the second control plate 21 to move upward to open the second discharge port, so that the high-density plastic at the bottom of the separation chamber 2 can be discharged, so as to sort the complex mixed plastics.

[0052] like Figure 5 As shown, a convex plate 19 is fixedly mounted on one side of the push plate 8 .

[0053] When pushing the light-density plastic, the movement of the push plate 8 drives the movement of the convex plate 19, causing the convex plate 19 to move toward one side of the first control plate 12. When the convex plate 19 moves to one side of the first control plate 12 and continues to move, it is convenient to push the light-density plastic upward from the first discharge port to the inside of the storage cavity 11.

[0054] like Figure 5 As shown, the inner walls of the push plate 8 and the convex plate 19 are both provided with filter holes 28, and the filter holes 28 are evenly distributed.

[0055] When pushing the light-density plastic, the liquid is separated through the filter holes 28, reducing the liquid resistance when the push plate 8 moves, thereby improving the separation efficiency.

[0056] like Figure 3 As shown, a second filter plate 26 is arranged inside the storage chamber 11 .

[0057] When the light-density plastic enters the storage chamber 11, the liquid inside the light-density plastic is separated by the second filter plate 26, thereby reducing the liquid content in the plastic and reducing the energy consumption and time of subsequent drying or cleaning.

[0058] like Figures 1 to 3 As shown, a collecting frame 27 is provided at the top of the second filter plate 26 , and the collecting frame 27 is slidably installed inside the storage cavity 11 .

[0059] The bottom of the collection frame 27 is evenly provided with water filtering holes;

[0060] When the light-density plastic enters the storage cavity 11 , the collecting frame 27 can be pulled upwards for quick removal.

[0061] like Figure 3 As shown, a first filter plate 20 is disposed at the bottom of the separation chamber 2 , and the first filter plate 20 is disposed on one side of the second control plate 21 .

[0062] The first filter plate 20 is tilted toward one side of the second control plate 21 to guide the high-density plastic on the top of the first filter plate 20 for easy discharge.

[0063] The bottom of the first filter plate 20 and the second filter plate 26 both have drainage spaces to facilitate solid-liquid separation;

[0064] The drain pipe 6 is Y-shaped, and both ends of the drain pipe 6 are respectively embedded in the separation chamber 2 and the storage chamber 11, so that the liquid at the bottom of the first filter plate 20 and the second filter plate 26 can be discharged together.

[0065] A sorting method of a complex mixed plastic sorting device comprises the following steps:

[0066] S1: When it is necessary to separate complex mixed plastics, firstly, a sufficient amount of separation liquid is placed inside the separation chamber 2, and then the crushed and cleaned complex mixed plastics are put into the separation chamber 2, and the first motor 5 is started. When the first motor 5 is started, the mixing shaft 3 is driven to rotate, and the rotation of the mixing shaft 3 drives the mixing blades 4 to rotate to mix the complex mixed plastics. After mixing for a period of time, the mixing blades 4 are stopped, so that the plastics with lower density float up and the plastics with higher density sink to the bottom;

[0067] S2: Then the second motor 9 is started. When the second motor 9 is started, it drives the first threaded rod 10 to rotate. The rotation of the first threaded rod 10 drives the push plate 8 to move, so that the push plate 8 pushes the light-density plastic on the top of the separation chamber 2 to one side of the storage chamber 11;

[0068] At the same time, the rotation of the first threaded rod 10 drives the transmission gear 14, and the rotation of the transmission gear 14 drives the movement of the rack plate 13, and the movement of the rack plate 13 drives the first control plate 12 to move downward, opening the first discharge port;

[0069] At the same time, the movement of the push plate 8 drives the movement of the convex plate 19, so that the convex plate 19 moves toward one side of the first control plate 12. When the convex plate 19 moves to one side of the first control plate 12 and continues to move, the light-density plastic is pushed upward from the first discharge port to the inside of the storage chamber 11, and the liquid in the light-density plastic is discharged to the bottom through the collection frame 27 and the second filter plate 26;

[0070] S3: After the light-density plastic is pushed into the storage chamber 11, the first threaded rod 10 is controlled to reverse. Similarly, the rotation of the first threaded rod 10 drives the rotation of the transmission gear 14, and the rotation of the transmission gear 14 drives the rack plate 13 to move upward. The movement of the rack plate 13 drives the first control plate 12 to move and close the first discharge port;

[0071] S4: Then the drain pipe 6 is opened through the ball valve 7 to discharge the liquid inside the separation chamber 2 and the storage chamber 11;

[0072] S5: After the liquid is discharged, the rotating shaft 25 is rotated again. The rotation of the rotating shaft 25 drives the rotation of the second bevel gear 24. The rotation of the second bevel gear 24 drives the rotation of the first bevel gear 23. The rotation of the first bevel gear 23 drives the rotation of the second threaded rod 22. The rotation of the second threaded rod 22 drives the second control plate 21 to move upward to open the second discharge port, so that the high-density plastic at the bottom of the separation chamber 2 is discharged, thereby completing the separation of complex mixed plastics.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A complex mixed plastic sorting device, comprising a sorting box (1), characterized in that: The separation box (1) is provided with a separation chamber (2) and a storage chamber (11) inside, a separation assembly is arranged on the top of the separation chamber (2), a mixing shaft (3) is rotatably mounted inside the separation chamber (2), mixing blades (4) are evenly mounted on the outer wall of the mixing shaft (3), a first motor (5) is arranged at one end of the mixing shaft (3), a drain pipe (6) is fixedly mounted on the side wall of the separation box (1), and a ball valve (7) is mounted inside the drain pipe (6); The separation assembly comprises a push plate (8) arranged at the top of the separation chamber (2); an inner wall of one side of the push plate (8) is threadedly connected to a first threaded rod (10); the first threaded rod (10) is rotatably mounted inside the sorting box (1); and a second motor (9) is arranged at one end of the first threaded rod (10).

2. A complex mixed plastic sorting device according to claim 1, characterized in that: A first control plate (12) is provided between the separation chamber (2) and the storage chamber (11); a rack plate (13) is fixedly connected to one side of the first control plate (12); a transmission gear (14) is meshedly connected to one side of the rack plate (13); and the transmission gear (14) is fixedly mounted on one end of the first threaded rod (10).

3. A complex mixed plastic sorting device according to claim 2, characterized in that: Both ends of the rack plate (13) are provided with tooth blocks (15), the inner walls of the two tooth blocks (15) are slidably mounted with connecting shafts (16), the outer walls of the connecting shafts (16) are sleeved with springs (18), and one end of the connecting shaft (16) away from the tooth blocks (15) is fixedly connected with a fixing block (17), and the fixing block (17) is fixedly mounted on the outer wall of the rack plate (13).

4. A complex mixed plastic sorting device according to claim 1, characterized in that: A second control plate (21) is provided on one side of the bottom of the separation chamber (2); the second control plate (21) is slidably mounted inside the sorting box (1); a second threaded rod (22) is threadedly connected to the top of the second control plate (21); a first bevel gear (23) is fixedly mounted on the top of the second threaded rod (22); a second bevel gear (24) is meshedly connected to one side of the first bevel gear (23); and a rotating shaft (25) is fixedly mounted on one side of the second bevel gear (24).

5. The complex mixed plastic sorting device according to claim 1, characterized in that: A convex plate (19) is fixedly mounted on one side of the push plate (8).

6. A complex mixed plastic sorting device according to claim 5, characterized in that: The inner walls of the push plate (8) and the convex plate (19) are both provided with filter holes (28), and the filter holes (28) are evenly distributed.

7. The complex mixed plastic sorting device according to claim 1, characterized in that: A second filter plate (26) is arranged inside the storage cavity (11).

8. The complex mixed plastic sorting device according to claim 7, characterized in that: A collecting frame (27) is provided at the top end of the second filter plate (26), and the collecting frame (27) is slidably mounted inside the storage cavity (11).

9. The complex mixed plastic sorting device according to claim 1, characterized in that: A first filter plate (20) is arranged at the bottom of the separation chamber (2), and the first filter plate (20) is arranged on one side of the second control plate (21).

10. A sorting method for a complex mixed plastic sorting device, the method being applicable to a complex mixed plastic sorting device as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: When it is necessary to separate complex mixed plastics, firstly, a sufficient amount of separation liquid is placed inside the separation chamber (2), and then the crushed and cleaned complex mixed plastics are put into the separation chamber (2), and the first motor (5) is started. When the first motor (5) is started, it drives the mixing shaft (3) to rotate, and the rotation of the mixing shaft (3) drives the mixing blades (4) to rotate to mix the complex mixed plastics. After mixing for a period of time, the mixed plastics are stopped, so that the plastics with lower density float up and the plastics with higher density sink to the bottom; S2: Then the second motor (9) is started. When the second motor (9) is started, it drives the first threaded rod (10) to rotate. The rotation of the first threaded rod (10) drives the push plate (8) to move, so that the push plate (8) pushes the light-density plastic on the top of the separation chamber (2) to one side of the storage chamber (11); At the same time, the rotation of the first threaded rod (10) drives the transmission gear (14), the rotation of the transmission gear (14) drives the rack plate (13) to move, and the movement of the rack plate (13) drives the first control plate (12) to move downward, thereby opening the first discharge port; At the same time, the movement of the push plate (8) drives the movement of the convex plate (19), so that the convex plate (19) moves toward one side of the first control plate (12). When the convex plate (19) moves to one side of the first control plate (12) and continues to move, the light-density plastic is pushed upward from the first discharge port to the inside of the storage cavity (11), and the liquid inside the light-density plastic is discharged to the bottom through the collection frame (27) and the second filter plate (26); S3: After the light-density plastic is pushed into the storage chamber (11), the first threaded rod (10) is controlled to rotate in the reverse direction. Similarly, the rotation of the first threaded rod (10) drives the transmission gear (14) to rotate, and the rotation of the transmission gear (14) drives the rack plate (13) to move upward. The movement of the rack plate (13) drives the first control plate (12) to move and close the first discharge port; S4: Then, the drain pipe (6) is opened through the ball valve (7) to discharge the liquid inside the separation chamber (2) and the storage chamber (11); S5: After the liquid is discharged, the rotating shaft (25) is rotated again. The rotation of the rotating shaft (25) drives the rotation of the second bevel gear (24). The rotation of the second bevel gear (24) drives the rotation of the first bevel gear (23). The rotation of the first bevel gear (23) drives the rotation of the second threaded rod (22). The rotation of the second threaded rod (22) drives the second control plate (21) to move upward to open the second discharge port, so that the high-density plastic at the bottom of the separation chamber (2) is discharged, thereby completing the separation of complex mixed plastics.

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