Impurity removing device for recycling PET (Polyethylene Terephthalate) bottle flakes

Abstract

The invention discloses an impurity removing device for PET bottle flake recovery, and relates to the technical field of PET bottle flake recovery. The problem of removing impurities with high adhesive force is solved. The device specifically comprises a cleaning pool; a feeding assembly used for feeding PET bottle chips is arranged on one side of the cleaning pool, a recycling pool is arranged on the other side of the cleaning pool, and a guide filter plate is arranged on the side, located above the recycling pool, of the cleaning pool. A plurality of sets of cleaning rollers and rubbing mechanisms which are sequentially arranged in a staggered mode are arranged at the top of the cleaning pool. According to the bottle chip cleaning device, the first rubbing plate and the second rubbing plate are arranged and can press bottle chips downwards, so that the bottle chips are rubbed under the condition that the bottle chips are immersed in cleaning water, and therefore stubborn stains and impurities can be removed; the lifting of the lifting plate and the rubbing plate I and the left-right rubbing motion driving of the rubbing plate I can be realized by utilizing single driving of the reciprocating driving assembly, so that the synchronous linkage is increased.

Description

Technical Field

[0001] The invention relates to the technical field of PET bottle flake recycling, and in particular to an impurity removing device for PET bottle flake recycling. Background Art

[0002] PET bottles are recyclable. When recycling, they are first cleaned to remove labels and bottle caps, and then crushed and melt-granulated. However, since there are stains with strong adhesion on the surface of PET, it is difficult to completely remove impurities inside and on the outer surface during the initial cleaning due to the different shapes of the bottles and the small bottle mouth. Therefore, after crushing into bottle flakes, secondary cleaning and impurity removal are required.

[0003] After searching, the Chinese patent publication number CN209887952U discloses a PET bottle flake cleaning device, including a first cleaning tank and a second cleaning tank fixed on one side of the first cleaning tank, a first cleaning roller is provided inside the first cleaning tank, a second cleaning roller is provided on one side of the first cleaning roller, a rotating shaft is provided inside the second cleaning tank, a stirring rod is provided around the outer side of the rotating shaft, and one end of the rotating shaft passes through the second cleaning tank and is fixedly connected to a second rotating motor.

[0004] The above patent has the following shortcomings: it uses flushing and stirring to clean PET bottle flakes, and cannot reliably remove stubborn stains and impurities with strong adhesion, and also has certain limitations.

[0005] To this end, the present invention provides an impurity removal device for recycling PET bottle flakes. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an impurity removal device for recycling PET bottle flakes.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An impurity removal device for recycling PET bottle flakes comprises a cleaning tank; a feeding assembly for feeding PET bottle flakes is arranged on one side of the cleaning tank, a recovery tank is arranged on the other side of the cleaning tank, and a guide filter plate is arranged on one side of the cleaning tank located above the recovery tank;

[0009] The top of the cleaning tank is provided with a plurality of groups of cleaning rollers and rubbing mechanisms which are arranged alternately in sequence;

[0010] The cleaning roller comprises a second shaft, a base roller and a plurality of clappers, wherein the second shaft is rotatably connected to the upper inner side of the cleaning tank, the base roller is coaxially fixed to the outer wall of the second shaft, and the plurality of clappers are fixed to the outer wall of the base roller in a circular array;

[0011] The kneading mechanism includes a gantry, a lifting plate, a kneading plate 1 and a kneading plate 2, the gantry is fixed to the top outer wall of the cleaning tank by bolts, the lifting plate is slidably connected to the inner side of the gantry by a guide rod 1, the kneading plate 1 is transmission-matched with the bottom of the lifting plate, and an elastic support component is arranged between the lifting plate and the kneading plate 1, the kneading plate 2 is arranged at the bottom of the kneading plate 1, and the kneading plate 2 is fixed to the inner side wall of the cleaning tank, and the kneading plate 2 is located below the cleaning liquid level;

[0012] A plurality of support plates are fixed to the top outer wall of the kneading plate, and a folding groove is opened on the inner wall of the support plate. A group of limit columns are rotatably connected to the top and bottom of the lifting plate respectively, and two limit columns located at the same longitudinal position are movably limited and matched with the inner wall of the folding groove.

[0013] Preferably: a reciprocating drive assembly for driving the lifting plate to move up and down is also provided on the inner side of the gantry.

[0014] Furthermore: the reciprocating drive assembly includes an axis one rotatably connected to the inner side of the bottom of the gantry and a plurality of crankshafts fixed to the axis one. The axis one is arranged in multiple sections, and different sections of the axis one are fixed by crankshafts. The eccentric part of the crankshaft is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to the top outer wall of the lifting plate.

[0015] Based on the above scheme: the elastic support component includes a slider, a second guide rod and a spring, the slider is slidably connected to a slideway opened on the inner wall of the rubbing plate, the second guide rod is fixed to the top outer wall of the slider, and the second guide rod is slidably connected to the inner wall of the lifting plate.

[0016] A better solution in the above solution is: the spring is sleeved on the outer wall of the second guide rod located between the lifting plate and the sliding block.

[0017] As a further solution of the present invention: a pleated gasket is provided on the inner wall of the slideway of the kneading plate 1, and the other end of the pleated gasket is fixed to the outer wall of the sliding block.

[0018] At the same time, the feeding assembly includes a storage hopper supported on the ground by supporting legs and a limit door movably plugged into the discharge port of the storage hopper.

[0019] As a preferred embodiment of the present invention: the top of the limit door is slidably connected to the side wall of the storage hopper through three guide rods, and the storage hopper is rotatably connected to a screw rod, and the outer wall of the screw rod is connected to the side wall of the limit door through a thread.

[0020] At the same time, an electric motor is fixed to an outer wall of one side of the cleaning tank by bolts, and the output shaft of the electric motor and all shafts one and two are synchronously connected through a synchronous transmission component.

[0021] As a more optimal solution of the present invention: the synchronous transmission component is a belt drive or a chain drive.

[0022] The beneficial effects of the present invention are:

[0023] 1. The present invention, by providing a rubbing board 1 and a rubbing board 2, can press down the bottle chips, so that the bottle chips are rubbed when immersed in cleaning water, thereby removing stubborn stains and impurities. In addition, through the ingenious structure of the limiting column and the folding groove, the lifting and lowering of the lifting plate and the rubbing board 1 and the left and right rubbing movement drive of the rubbing board 1 can be realized by a single drive of the reciprocating drive component, thereby increasing the synchronous linkage.

[0024] 2. The present invention, by setting an elastic support component, on the one hand, can meet the elastic connection between the lifting plate and the kneading plate 1 to ensure the reliability of kneading and resetting; on the other hand, by setting a slider, it can also meet the guidance of the kneading movement of the kneading plate 1 and the lifting plate. At the same time, a pleated gasket is provided, which can prevent the bottle pieces from entering the slideway of the slider, thereby preventing jamming.

[0025] 3. The present invention sets a limit gate, and can adjust the depth of the limit gate inserted into the storage hopper outlet by rotating the screw, thereby adjusting the discharge speed, thereby controlling the discharge speed, ensuring that the bottle flakes will not accumulate thickly during subsequent cleaning and kneading, and increasing the impurity removal effect.

[0026] 4. The present invention, on the one hand, can realize the recycling of cleaning water by arranging components such as a circulation pump and a circulation pipe. On the other hand, by arranging a filter, the returned sewage can be filtered and cleaned to ensure the cleaning effect of continuous cleaning.

[0027] 5. The present invention, by setting a synchronous transmission component, can, on the one hand, enable a single motor to synchronously drive the cleaning roller and the kneading mechanism to work, and on the other hand, can adaptively match the conveying speed of the cleaning roller and the frequency of two kneadings of the kneading mechanism to prevent energy waste caused by insufficient kneading or excessive kneading frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of an impurity removal device for PET bottle flake recycling proposed by the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a kneading mechanism of an impurity removal device for PET bottle flake recycling proposed by the present invention;

[0030] Figure 3This is a partial cross-sectional structural schematic diagram of a kneading mechanism of an impurity removal device for PET bottle flake recycling proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a feeding component of an impurity removal device for PET bottle flake recycling proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of a cleaning roller of an impurity removal device for PET bottle flake recycling proposed by the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a circulation pump, a filter, and a circulation pipe of an impurity removal device for PET bottle flake recycling proposed by the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of a synchronous transmission component of an impurity removal device for PET bottle flake recycling proposed by the present invention.

[0035] In the figure: 1. cleaning tank; 2. feeding assembly; 3. cleaning roller; 4. kneading mechanism; 5. guide filter plate; 6. recovery tank; 7. gantry; 8. guide rod one; 9. reciprocating drive assembly; 10. lifting plate; 11. elastic support assembly; 12. kneading plate one; 13. kneading plate two; 14. crankshaft; 15. shaft one; 16. limit column; 17. folding groove; 18. connecting rod; 19. slider; 20. pleated gasket; 21. guide rod two; 22. spring; 23. support leg; 24. storage hopper; 25. screw; 26. guide rod three; 27. limit door; 28. shaft two; 29. ​​clapboard; 30. base roller; 31. circulation pump; 32. filter; 33. circulation pipe; 34. synchronous transmission assembly; 35. motor. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] Embodiment 1:

[0039] An impurity removal device for PET bottle flake recycling, such as Figure 1-Figure 7As shown, it includes a cleaning tank 1, one side of which is provided with a feeding assembly 2 for feeding PET bottle flakes, the other side of the cleaning tank 1 is provided with a recovery tank 6, and the side of the cleaning tank 1 located above the recovery tank 6 is provided with a guide filter plate 5.

[0040] The top of the cleaning pool 1 is provided with a plurality of groups of cleaning rollers 3 and kneading mechanisms 4 which are arranged alternately in sequence.

[0041] The cleaning roller 3 includes an axis 28, a base roller 30 and a plurality of clappers 29. The axis 28 is rotatably connected to the upper inner side of the cleaning pool 1, the base roller 30 is coaxially fixed to the outer wall of the axis 28, and the plurality of clappers 29 are fixed to the outer wall of the base roller 30 in a circular array.

[0042] The kneading mechanism 4 includes a gantry 7, a lifting plate 10, a kneading plate 12 and a kneading plate 2 13. The gantry 7 is fixed to the top outer wall of the cleaning tank 1 by bolts, the lifting plate 10 is slidably connected to the inner side of the gantry 7 by a guide rod 1 8, the kneading plate 12 is transmission-matched to the bottom of the lifting plate 10, and an elastic supporting component 11 is arranged between the lifting plate 10 and the kneading plate 12, the kneading plate 2 13 is arranged at the bottom of the kneading plate 12, and the kneading plate 2 13 is fixed to the inner wall of the cleaning tank 1, and the kneading plate 2 13 is located below the cleaning liquid level.

[0043] A plurality of support plates are fixed to the top outer wall of the kneading plate 12, and a fold line groove 17 is opened on the inner wall of the support plate. A group of limit columns 16 are rotatably connected to the top and bottom of the lifting plate 10, and two limit columns 16 located at the same longitudinal position are movably limited and matched with the inner wall of the fold line groove 17.

[0044] A reciprocating drive assembly 9 for driving the lifting plate 10 to move up and down is also provided on the inner side of the gantry 7 .

[0045] In the present embodiment, there is no limitation on the number and position of the limiting columns 16 and the supporting plates. Preferably, there are four supporting plates, which are symmetrically fixed in pairs at the four corners of the kneading plate 12. There are four limiting columns 16, two at the top of the lifting plate 10 and two at the bottom of the lifting plate 10. One end of the two limiting columns 16 located on the same side is movably engaged with the same fold line groove 17, and the other end of the two limiting columns 16 is movably engaged with another fold line groove 17.

[0046] When the device is in use, the bottle chips are stored in the feeding component 2, and cleaning water is added to the cleaning pool 1 so that the water level is above the rubbing plate 13 and does not overflow the cleaning pool 1. Then the feeding component 2 feeds the bottle chips to one side of the cleaning pool 1, and the cleaning roller 3 rotates to press the bottle chips to the bottom of the cleaning water and then transports them to the other side. Multiple cleaning rollers 3 rotate to realize the transverse directional transportation of the bottle chips. When the bottle chips are transported to the rubbing mechanism 4, the reciprocating drive component 9 causes the lifting plate 10 to descend until the rubbing plate 12 contacts the bottle chips, and then continues to descend to drive the bottle chips to move downward until the rubbing plate 12 contacts the rubbing plate 2 13 to limit, and the lifting plate 10 continues to descend, thereby passing through the limit The cooperation between the column 16 and the folding groove 17 enables the kneading plate 12 to move left and right, while the kneading plate 2 13 is fixed, so as to realize the kneading of the bottle flakes. After the lifting plate 10 drops to the bottom, it then rises. During the rising process, the elastic support component 11 is compressed to generate elasticity, so that the lifting plate 10 moves up first while the kneading plate 12 is fixed. During this process, the kneading plate 12 will continue to move left and right for kneading. Subsequently, after being pressed, soaked and kneaded by multiple groups of cleaning rollers 3 and kneading mechanisms 4, the bottle flakes floating on the cleaning water are transported to the guide filter plate 5, and the cleaning wastewater is filtered by the guide filter plate 5 and enters the recovery pool 6. The bottle flakes after impurities are discharged through the end of the guide filter plate 5 and collected.

[0047] The device, by providing a rubbing plate 12 and a rubbing plate 13, can press down the bottle pieces so that the bottle pieces are rubbed while being immersed in cleaning water, thereby removing stubborn stains and impurities. In addition, through the ingenious structure of the limiting column 16 and the folding groove 17, the lifting and lowering of the lifting plate 10 and the rubbing plate 12 and the left and right rubbing movement drive of the rubbing plate 12 can be realized by a single drive of the reciprocating drive component 9, thereby increasing the synchronous linkage.

[0048] In order to solve the lifting drive problem; Figure 3 As shown, the reciprocating drive assembly 9 includes a shaft 15 rotatably connected to the inner side of the bottom of the gantry 7 and a plurality of crankshafts 14 fixed to the shaft 15. The shaft 15 is arranged in multiple sections, and different sections of the shaft 15 are fixed by the crankshafts 14. The eccentric part of the crankshaft 14 is rotatably connected to a connecting rod 18, and the other end of the connecting rod 18 is rotatably connected to the top outer wall of the lifting plate 10.

[0049] When shaft 15 rotates, it can drive the crankshaft 14 to rotate, thereby driving the lifting plate 10 to rise and fall through the connecting rod 18.

[0050] In order to solve the elastic support problem; Figure 3As shown, the elastic support assembly 11 includes a slider 19, a guide rod 21 and a spring 22. The slider 19 is slidably connected to a slideway provided on the inner wall of the rubbing plate 12. The guide rod 21 is fixed to the top outer wall of the slider 19, and the guide rod 21 is slidably connected to the inner wall of the lifting plate 10. The spring 22 is sleeved on the outer wall of the guide rod 21 located between the lifting plate 10 and the slider 19.

[0051] A pleated sealing pad 20 is provided on the inner wall of the slideway of the kneading plate 12 , and the other end of the pleated sealing pad 20 is fixed to the outer wall of the slider 19 .

[0052] By setting the elastic support component 11, on the one hand, it can meet the elastic connection between the lifting plate 10 and the kneading plate 12 to ensure the reliability of kneading reset. On the other hand, by setting the slider 19, it can also meet the guidance of the kneading movement of the kneading plate 12 and the lifting plate 10. At the same time, the pleated sealing pad 20 is set, which can prevent the bottle pieces from entering the slideway of the slider 19, thereby preventing jamming.

[0053] In order to solve the feeding problem; Figure 4 As shown, the feeding assembly 2 includes a storage hopper 24 supported on the ground by supporting legs 23 and a limit gate 27 movably plugged into the discharge port of the storage hopper 24, the top of the limit gate 27 is slidably connected to the side wall of the storage hopper 24 through a guide rod 26, and the storage hopper 24 is rotatably connected to a screw 25, and the outer wall of the screw 25 is connected to the side wall of the limit gate 27 through a thread.

[0054] Bottle flakes are placed inside the storage hopper 24, and then discharged from the outlet of the storage hopper 24 into the cleaning tank 1, and the depth of the limit gate 27 inserted into the outlet of the storage hopper 24 can be adjusted by rotating the screw 25, thereby adjusting the discharge speed.

[0055] The device is provided with a limit gate 27, and the depth of the limit gate 27 inserted into the outlet of the storage hopper 24 can be adjusted by rotating the screw 25, thereby adjusting the discharge speed, thereby controlling the discharge speed, ensuring that the bottle flakes will not accumulate thickly during subsequent cleaning and kneading, and increasing the impurity removal effect.

[0056] To solve the water cycle problem; Figure 6 As shown, a circulation pipe 33 is fixed at the bottom of one side of the recovery pool 6 and connected thereto, the other end of the circulation pipe 33 is located above the upstream of the cleaning pool 1, and a circulation pump 31 for driving water and a filter 32 for filtering sewage are installed on the circulation pipe 33.

[0057] The cleaned sewage enters the recovery tank 6, and then the circulation pump 31 pumps out the sewage and transports it to the upstream of the cleaning tank 1 again, and the filter 32 filters the sewage during the reflux process.

[0058] The device can realize the recycling of cleaning water by arranging the circulating pump 31, the circulating pipe 33 and other components. In addition, by arranging the filter 32, the returned sewage can be filtered and cleaned to ensure the cleaning effect of continuous cleaning.

[0059] When the present embodiment is in use, the bottle chips are placed inside the storage hopper 24, and then the bottle chips are discharged from the outlet of the storage hopper 24 into the cleaning tank 1, and the depth of the limit gate 27 inserted into the outlet of the storage hopper 24 can be adjusted by rotating the screw 25, so as to adjust the discharge speed, and add cleaning water into the cleaning tank 1 so that the water level is located above the rubbing plate 13 and does not overflow the cleaning tank 1, and then the feeding component 2 feeds the bottle chips to one side of the cleaning tank 1, and the cleaning roller 3 rotates to press the bottle chips to the bottom of the cleaning water and then transports them to the other side, and multiple cleaning rollers 3 rotate to realize the transverse directional transportation of the bottle chips. When the bottle chips are transported to the rubbing mechanism 4, the reciprocating drive component 9 causes the lifting plate 10 to descend until the rubbing plate 12 contacts the bottle chips, and then continues to descend to drive the bottle chips to move downward, until the rubbing plate 12 contacts the rubbing plate 13 and the lifting plate 10 continues to descend, thereby The cooperation between the limiting column 16 and the folding groove 17 enables the kneading plate 12 to move left and right, while the kneading plate 2 13 is fixed, so as to realize the kneading of the bottle chips. After the lifting plate 10 drops to the bottom, it then rises. During the rising process, the elastic support component 11 is compressed to generate elasticity, so that the lifting plate 10 moves up first while the kneading plate 12 is fixed. During this process, the kneading plate 12 will continue to move left and right for kneading. Subsequently, after being pressed, soaked and kneaded by multiple groups of cleaning rollers 3 and the kneading mechanism 4, the bottle chips floating on the cleaning water are transported to the guide filter plate 5, and the cleaning wastewater is filtered by the guide filter plate 5 and enters the recovery pool 6. The bottle chips after impurities are discharged through the end of the guide filter plate 5 and collected. The cleaned wastewater enters the recovery pool 6, and then the circulating pump 31 extracts the wastewater and transports it to the upstream of the cleaning pool 1 again, and the filter 32 filters the wastewater during the reflux process.

[0060] Embodiment 2:

[0061] An impurity removal device for PET bottle flake recycling, such as Figure 7 As shown, in order to solve the synchronization problem; this embodiment makes the following improvements on the basis of embodiment 1: a motor 35 is fixed to the outer wall of one side of the cleaning tank 1 by bolts, and the output shaft of the motor 35 and all shafts 15 and shaft 2 28 are synchronously connected through a synchronous transmission component 34. In this embodiment, the specific type of the synchronous transmission component 34 is not limited, and it can be a belt drive or a chain drive, which only needs to ensure that all shafts 15 have the same rotation speed and all shafts 28 have the same rotation speed and direction.

[0062] When the present embodiment is in use, when the motor 35 is started, it can drive all the shafts 15 and the screw rods 25 to rotate synchronously through the synchronous transmission assembly 34 .

[0063] This device, by setting up a synchronous transmission component 34, can enable a single motor 35 to synchronously drive the cleaning roller 3 and the kneading mechanism 4 to work, and can also adaptively match the conveying speed of the cleaning roller 3 and the frequency of two kneadings of the kneading mechanism 4 to prevent energy waste caused by insufficient kneading or excessive kneading frequency.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An impurity removal device for recycling PET bottle flakes, comprising a cleaning tank (1), characterized in that: A feeding assembly (2) for feeding PET bottle flakes is arranged on one side of the cleaning tank (1), a recovery tank (6) is arranged on the other side of the cleaning tank (1), and a guide filter plate (5) is arranged on one side of the cleaning tank (1) located above the recovery tank (6); The top of the cleaning pool (1) is provided with a plurality of groups of cleaning rollers (3) and kneading mechanisms (4) which are arranged alternately in sequence; The cleaning roller (3) comprises a second shaft (28), a base roller (30) and a plurality of clappers (29); the second shaft (28) is rotatably connected to the upper inner side of the cleaning pool (1); the base roller (30) is coaxially fixed to the outer wall of the second shaft (28); and the plurality of clappers (29) are fixed to the outer wall of the base roller (30) in a circular array; The kneading mechanism (4) comprises a gantry (7), a lifting plate (10), a kneading plate 1 (12) and a kneading plate 2 (13); the gantry (7) is fixed to the top outer wall of the cleaning tank (1) by bolts; the lifting plate (10) is slidably connected to the inner side of the gantry (7) by a guide rod 1 (8); the kneading plate 1 (12) is transmission-matched with the bottom of the lifting plate (10); an elastic support component (11) is arranged between the lifting plate (10) and the kneading plate 1 (12); the kneading plate 2 (13) is arranged at the bottom of the kneading plate 1 (12); the kneading plate 2 (13) is fixed to the inner side wall of the cleaning tank (1); and the kneading plate 2 (13) is located below the cleaning liquid level; A plurality of support plates are fixed to the top outer wall of the kneading plate (12), and a folding groove (17) is provided on the inner wall of the support plate. A group of limit posts (16) are rotatably connected to the top and bottom of the lifting plate (10), and two limit posts (16) located at the same longitudinal position are movably limited and matched to the inner wall of the folding groove (17).

2. According to the impurity removal device for PET bottle flake recycling according to claim 1, a reciprocating drive component (9) for driving the lifting plate (10) to rise and fall is also provided on the inner side of the gantry (7).

3. The impurity removal device for PET bottle flakes recycling according to claim 2, characterized in that: The reciprocating drive assembly (9) comprises a shaft (15) rotatably connected to the inner side of the bottom of the gantry (7) and a plurality of crankshafts (14) fixed to the shaft (15); the shaft (15) is arranged in multiple sections, and different sections of the shaft (15) are fixed by the crankshafts (14); a connecting rod (18) is rotatably connected to the eccentric part of the crankshaft (14), and the other end of the connecting rod (18) is rotatably connected to the top outer wall of the lifting plate (10).

4. The impurity removal device for PET bottle flakes recycling according to claim 1, characterized in that: The elastic support assembly (11) comprises a slider (19), a second guide rod (21) and a spring (22); the slider (19) is slidably connected to a slideway provided on the inner wall of the first kneading plate (12); the second guide rod (21) is fixed to the top outer wall of the slider (19); and the second guide rod (21) is slidably connected to the inner wall of the lifting plate (10).

5. The impurity removal device for PET bottle flakes recycling according to claim 4, characterized in that: The spring (22) is sleeved on the outer wall of the second guide rod (21) between the lifting plate (10) and the sliding block (19).

6. The impurity removal device for PET bottle flakes recycling according to claim 5, characterized in that: The inner wall of the slideway of the rubbing plate (12) is provided with a pleated sealing pad (20), and the other end of the pleated sealing pad (20) is fixed to the outer wall of the sliding block (19).

7. The impurity removal device for PET bottle flakes recycling according to claim 1, characterized in that: The material supply assembly (2) comprises a material storage hopper (24) supported on the ground by supporting legs (23) and a limit gate (27) movably plugged into a material outlet of the material storage hopper (24).

8. The impurity removal device for PET bottle flakes recycling according to claim 7, characterized in that: The top of the limit door (27) is slidably connected to the side wall of the storage hopper (24) through a guide rod (26), and the storage hopper (24) is rotatably connected to a screw rod (25), and the outer wall of the screw rod (25) is connected to the side wall of the limit door (27) through a thread.

9. The impurity removal device for PET bottle flakes recycling according to claim 1, characterized in that: An electric motor (35) is fixed to an outer wall of one side of the cleaning tank (1) by means of bolts, and the output shaft of the electric motor (35) and all shafts one (15) and two (28) are synchronously connected via a synchronous transmission assembly (34).

10. The impurity removal device for PET bottle flakes recycling according to claim 9, characterized in that: The synchronous transmission component (34) is a belt drive or a chain drive.

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