A plastic film recycling apparatus

Abstract

The application discloses the field of waste plastic recycling, and discloses a plastic film recycling device which is used for cleaning and recycling of the broken plastic film and comprises a cleaning pool, the end of the cleaning pool is provided with a conveying belt arranged obliquely, water filtering holes are formed in the conveying belt, and extrusion components are arranged on the conveying belt; the broken pieces are extruded by the extrusion components, so that the speed of water drainage of the broken pieces is accelerated, and the subsequent recycling process is ensured to be carried out smoothly. The traditional conveying belt only relies on gravity to drain water, and the water in the wet plastic pieces and between the layers of the wet plastic pieces cannot be effectively drained, so that a large amount of water is taken out. In the running cycle of the conveying belt, intermittent extrusion actions are introduced, the squeezing process destroys the "wet cake" structure of the wet material caused by the surface tension of the water film, so that the water is more easily released, the initial moisture content of the material is greatly reduced, the load of the subsequent centrifugal dewatering or hot air drying equipment is effectively reduced, and the energy consumption and operation cost are significantly saved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of waste plastic recycling, and particularly relates to a plastic film recycling treatment equipment. BACKGROUND

[0002] Traditional waste plastic films are mostly treated by landfill or incineration, which is easy to cause environmental pollution. With the improvement of environmental protection requirements, plastic recycling equipment is gradually popularized. For example, a plastic granulator using recycled plastic with application number CN202420652422.6, which washes the plastic through a washing tank and a stirring assembly, and lifts the wet material by using a conveying belt with water leakage holes to realize preliminary water draining. However, there are still obvious problems in the actual operation process:

[0003] Firstly, the current commonly used wet material extraction methods such as grab bucket, conveying belt or screw conveyor have a significant problem of "too much water". When the wet plastic fragments are fished out of the water tank, a large amount of washing water is taken out together with the material, resulting in a very high initial moisture content of the material, usually more than 80%. This not only greatly increases the processing load of the subsequent dehydration equipment (such as centrifuge, hot air dryer, etc.), prolongs the drying time, and increases the energy consumption, but also causes a large amount of invalid loss of the washing water system. In order to maintain the continuous operation of the washing process, fresh water source must be constantly supplemented, thereby increasing the overall water consumption and increasing the difficulty and operating cost of subsequent sewage treatment. In addition, due to the fact that the plastic film is broken into pieces, light in quality and large in specific surface area, the wet material is easy to overlap and entangle with each other during the stacking process, forming a dense "wet cake" block.

[0004] Secondly, the wet plastic fragments are generally prone to "sticking to the screen" and "blocking the screen" during transportation and dehydration. Because the surface of the fragments is covered with a layer of water film, the surface tension of the water makes it easy to adhere closely to the surface of the screen made of metal or plastic material, especially forming a "bridging" effect at the edge of the screen hole. The gravity of the light plastic fragments is small, and it is often not enough to overcome the adhesion force to realize automatic falling off. When a large number of fragments are adsorbed on the surface of the screen or block the screen holes, not only the normal flow of water is hindered, causing the liquid level in the washing tank to abnormally rise and even overflow, affecting the washing effect, but also the running resistance of the conveying system increases, equipment failures occur frequently, and in severe cases, manual cleaning is required, which seriously affects the production continuity and automation level. SUMMARY

[0005] Therefore, the present application aims to provide a plastic film recycling treatment equipment to solve the problems existing in the background art.

[0006] To address the aforementioned technical problems, the present invention provides a plastic film recycling and processing device for cleaning and recycling crushed plastic film. The device includes a cleaning tank, with an inclined conveyor belt at the end of the tank. The conveyor belt has filter holes and is equipped with a squeezing component. The cleaned fragments are scooped out of the cleaning tank via the conveyor belt. The inclination of the conveyor belt and the filter holes facilitate rapid drainage of the scooped fragments. The squeezing component then further squeezes the scooped fragments, accelerating the drainage process and ensuring the smooth operation of subsequent recycling steps.

[0007] Preferably, the extrusion component includes an extrusion block, the extrusion surface of which is parallel to the conveying surface of the conveyor belt, and the extrusion block is movably disposed on the washing tank or the conveyor belt. When the conveyor belt is running, the extrusion block is moved away from the conveyor belt to avoid affecting the debris retrieval operation of the conveyor belt. When the conveyor belt stops the debris retrieval operation, the extrusion block moves closer to the conveyor belt and extrudes the retrieved debris to accelerate the drainage speed of the debris.

[0008] Furthermore, an extrusion plate is provided on the side of the conveyor belt away from the extrusion block; under the action of the extrusion plate and the extrusion block, the conveyor belt is pressed and dehydrated.

[0009] Furthermore, the extrusion component is equipped with a drive component, which includes a control wheel and a connecting rod; one end of the connecting rod is rotatably connected to the eccentric part of the control wheel, and the other end of the connecting rod is rotatably connected to the extrusion component; when the control wheel rotates, the extrusion component is driven to perform extrusion operations under the action of the connecting rod.

[0010] Furthermore, the extrusion block is slidably disposed on one side of the conveyor belt in a horizontal direction, and the extrusion surface is located on the side of the extrusion block and faces the side of the conveyor belt; the extrusion block is connected to the connecting rod, and the extrusion block is driven to move horizontally through the driving component; the extrusion block and the extrusion plate together clamp the plastic fragments on the conveyor belt to achieve lateral pressing and dehydration.

[0011] Furthermore, the extrusion block moves along the normal direction of the conveyor belt surface, and the extrusion surface is located at the bottom end of the extrusion block and faces the side of the conveyor belt; when the extrusion block presses down vertically, it uniformly presses and dehydrates the plastic fragments on the conveyor belt.

[0012] Further, the extrusion block is equipped with a control block, which is movably arranged on the cleaning pool or the conveying belt, the moving direction of the control block is perpendicular to the moving direction of the extrusion block, and the contact surfaces of the extrusion block and the control block are both arranged in an inclined manner; the control block is connected with the connecting rod, and is moved by the driving component, and under the action of the contact surface, the extrusion block is vertically pressed down.

[0013] Further, the conveying belt comprises a material belt and a transmission shaft, a transmission wheel is arranged on the transmission shaft above the conveying belt, a driving wheel is arranged between the transmission wheel and the control wheel; when the transmission wheel and the driving wheel are engaged, the conveying belt is started; when the control wheel and the driving wheel are engaged, the extrusion component is started; through the alternate engagement of the driving wheel with the transmission wheel and the control wheel, the alternate starting of the conveying belt and the extrusion component is realized.

[0014] Further, the transmission wheel and the control wheel are both complete gears, and the driving wheel is an incomplete gear; the incomplete gear has a toothed portion with a circumferential one-fourth arc length, and in each rotation period of the incomplete gear, the toothed portion is engaged with the control wheel to drive the control wheel to rotate at least one round; when the driving wheel rotates, the incomplete toothed portion periodically engages with the transmission wheel and the control wheel alternately to realize the alternate driving of the two; at the same time, the transmission relationship between the incomplete gear and the control wheel is configured to automatically drive the extrusion component to reset after the extrusion component completes the working action.

[0015] Further, the transmission shaft above the conveying belt is a blowing shaft, the blowing shaft comprises a shaft body arranged in a ring shape, an output gas path is arranged on the shaft body, the running direction of the output gas path is parallel to the axial direction of the shaft body, and the output gas path is arranged on the shaft body in a ring shape; connecting blocks are arranged at both ends of the shaft body, control gas paths are arranged on the connecting blocks; the control block is fixedly arranged on the conveying belt; by conveying gas into the control gas path, directional blowing of the output end of the conveying belt is realized under the cooperation of the output gas path, and the problem that fragments are difficult to fall off due to being adsorbed on the conveying belt is avoided.

[0016] The technical effects of the present application mainly embody in the following aspects:

[0017] By setting the intermittent action of the extrusion part, the static pressing dewatering of the wet material after lifting is realized, and the initial moisture content is significantly reduced. The traditional conveying belt only relies on gravity to drain water, and the water in the internal and interlayer of the wet plastic fragments is difficult to effectively drain, resulting in a large amount of water being taken out. The present application introduces intermittent extrusion action in the running cycle of the conveying belt, that is, when the conveying belt is temporarily stopped, the extrusion block applies mechanical pressure to the accumulated material, forcing the extrusion of free water and part of capillary water between the fragments. The pressing process destroys the "wet cake" structure formed by the surface tension of the water film of the wet material, so that the water is more easily released, thereby greatly reducing the initial moisture content of the material, effectively reducing the load of the subsequent centrifugal dewatering or hot air drying equipment, and significantly saving energy consumption and operation cost.

[0018] In view of the problem that the plastic fragments are unevenly distributed on the conveying belt, the accumulated material is loose or locally too thick, the extrusion block is designed to vertically press along the normal direction of the conveying belt, and the extrusion surface is located at the bottom and covers the material area. This way can apply uniform pressure on the entire material section, avoiding the edge leakage or pressure gradient unevenness that may occur in lateral extrusion. Vertical pressing is more conducive to compressing the overall thickness of the material, promoting the migration of internal moisture outward, especially suitable for the dewatering needs of sheet-shaped lightweight materials, improving the uniformity and reliability of dewatering, and ensuring stable dewatering performance under different working conditions.

[0019] The present application innovatively uses the periodic meshing of an incomplete gear and two complete gears (drive wheel and control wheel) to realize the alternating execution of the conveying belt operation and extrusion action under a single power source. When the incomplete gear meshes with the drive wheel, the conveying belt is driven to lift the material; after rotating through a certain angle, it is switched to the control wheel to trigger the extrusion action. This pure mechanical timing control scheme does not require PLC programming or sensor feedback, avoiding the risk of electrical system failure in a humid environment, reducing equipment cost and maintenance difficulty, while ensuring the accuracy and repeatability of the action rhythm, improving the automation level and operation safety of the system.

[0020] In view of the technical problem that lightweight plastic fragments adhere to the screen due to water film adsorption and are difficult to fall off, the upper drive shaft is transformed into a hollow air blowing shaft, and an air path system is built in. When the material reaches the discharge end, compressed air is sprayed through the directional air outlet on the surface of the shaft body, forming an air flow layer adhering to the surface of the conveying belt, destroying the water film tension between the fragments and the screen, and weakening the adhesion. This auxiliary air blowing measure can effectively prevent the material from accumulating and blocking the water filter hole, avoid the liquid level rising or equipment shutdown caused by "net blocking", ensure the continuous and stable operation of the conveying system, reduce the frequency of manual cleaning, and improve the production efficiency and automation level. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structural diagram of the present application;

[0022] Figure 2Fig. 1 is a structural diagram of a conveying belt in the present application; Figure 1 Fig. 2 is a structural diagram of an extrusion component in the present application;

[0023] Figure 3 Fig. 3 is a structural diagram of a driving component in the present application; Figure 1 Fig. 4 is a matching structural diagram of the extrusion component and the driving component in the present application;

[0024] Figure 4 Fig. 5 is a structural diagram of a blowing shaft in the present application; Figure 1 Fig. 6 is a structural diagram of the extrusion component in the present application;

[0025] Figure 5 Fig. 7 is a structural diagram of the driving component in the present application; Figure 1 Fig. 8 is a structural diagram of the blowing shaft in the present application;

[0026] Figure 6 Fig. 9 is a structural diagram of a cleaning tank in the present application; Figure 1 Fig. 10 is a structural diagram of a conveying belt in the present application; Fig. 11 is a structural diagram of an extrusion component in the present application;

[0027] Fig. 1 is a structural diagram of a conveying belt in the present application; DETAILED DESCRIPTION

[0028] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, so that the technical scheme of the present application is easier to understand and master. In the embodiments, it should be understood that the orientations or positional relationships indicated by the terms "intermediate", "upper", "lower", "top", "right side", "left end", "upper", "back", "middle" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the present specific embodiments, if the connection or fixing manner between components is not specifically described, the connection or fixing manner can be bolted or pinned, or connected by a pin shaft, which is commonly used in the prior art, and therefore, in the present embodiments, it will not be described in detail.

[0029] The plastic film recycling device provided by the present application is mainly applied to the wet material extraction and pre-dewatering link after the waste plastic film is crushed, and is especially suitable for the intermediate treatment stage after the cleaning process and before entering the centrifugal dewatering or hot air drying. However, it is not limited to this, and the device can also be used for wet material lifting and preliminary dewatering treatment of other same or similar light sheet materials (such as paper pulp fragments, textile scraps, agricultural films, etc.) in the water washing process, and has good process adaptability and popularization value.

[0030] In addition, as the common knowledge in the industry, the structure of the cleaning pool 1 mentioned above, the basic transmission principle of the conveying belt 2, the opening mode of the water filtering hole, and the conventional chain wheel, gear, eccentric wheel driving mechanism all belong to the conventional technical means in the field of plastic recycling equipment. The above is common knowledge, so the principle and structure will not be described in detail.

[0031] Embodiment one

[0032] Referring to Figure 1 , the embodiment discloses a plastic film recycling device for cleaning and recycling after the plastic film is crushed, which comprises a cleaning pool 1, the end of the cleaning pool 1 is provided with a conveying belt 2 arranged obliquely, the conveying belt 2 is provided with a water filtering hole, and the conveying belt 2 is provided with an extrusion component 3; the crushed pieces after cleaning are fished out from the cleaning pool 1 through the conveying belt 2, and the crushed pieces are quickly drained (preliminary gravity drainage) from the cleaning pool 1 under the action of the oblique conveying belt 2 and the water filtering hole; and the fished-out crushed pieces are extruded by the extrusion component 3, so that the drainage speed of the crushed pieces is accelerated, and the subsequent recycling process is ensured to proceed smoothly.

[0033] Further, referring to Figure 2 , Figure 3 , Figure 4 , on the basis of the conventional gravity drainage, an intermittent dynamic extrusion dehydration mechanism is innovatively introduced, the forced dehydration is implemented in the stationary phase after the wet material is lifted through the mechanical pressing mode, the dehydration efficiency of the material per unit time is significantly improved, the initial water content is reduced, thereby the load of the subsequent dehydration equipment is reduced, and the energy consumption and water resources are saved. Specifically, the extrusion component 3 comprises an extrusion block 31, the extrusion surface of the extrusion block 31 is parallel to the conveying surface of the conveying belt 2, and the extrusion block 31 is movably arranged on the cleaning pool 1 or the conveying belt 2; when the conveying belt 2 operates, the extrusion block 31 is away from the safe position of the conveying belt 2, so as to avoid the influence of the extrusion block 31 on the fishing operation of the crushed pieces of the conveying belt 2; when the conveying belt 2 completes a lifting action and stops the fishing operation of the crushed pieces, the extrusion block 31 is close to the conveying belt 2 under the action of a driving component 4, and the wet plastic crushed pieces accumulated on the surface of the conveying belt 2 are directionally extruded, so as to further extrude the water in the material and the interlayer water, thereby the overall drainage speed is accelerated, and the dehydration effect is improved.

[0034] Further, referring to Figure 2 , Figure 3To achieve a more complete squeezing effect; the conveying surface of the conveying belt 2 away from the side of the extrusion block 31 is provided with an extrusion plate 32; the extrusion plate 32 is fixedly installed on the conveying belt 2 support structure, and forms an opposite clamping structure with the extrusion block 31. During the advancement of the extrusion block 31, the plastic fragments are clamped between the extrusion block 31 and the extrusion plate 32, forming a "sandwich squeezing" mode, effectively destroying the capillary water network inside the wet material lump, breaking the "wet cake" structure caused by surface tension, and significantly improving the dehydration rate.

[0035] Preferably, referring to Figure 3 、 Figure 5 , the extrusion component 3 is equipped with a driving component 4, which includes a control wheel 41 and a connecting rod 42; one end of the connecting rod 42 is rotatably connected at the eccentric position of the control wheel 41, and the other end of the connecting rod 42 is rotatably connected to the extrusion component 3; when the control wheel 41 rotates, its eccentric motion is converted into reciprocating linear motion of the extrusion block 31 through the connecting rod 42, realizing periodic extrusion and reset action.

[0036] In this embodiment, the extrusion block 31 is slidably arranged on one side of the conveying belt 2 in the horizontal direction, and the extrusion surface is located on the side of the extrusion block 31 and faces the side surface of the conveying belt 2; the extrusion block 31 and the connecting rod 42 are connected, and the extrusion block 31 is driven by the driving component 4 to advance horizontally, and the extrusion block 31 and the extrusion plate 32 jointly clamp the plastic fragments on the conveying belt 2, realizing lateral squeezing dehydration. This structure is suitable for the case where the sheet material is stacked thick in the transverse direction, and is conducive to breaking the water film adhesion between the sheet layers.

[0037] Further, referring to Figure 3 、 Figure 5To realize the coordinated control of the operation of the conveying belt 2 and the extrusion action; the conveying belt 2 comprises a material belt 21 and a transmission shaft 22, a transmission wheel 43 is arranged on the transmission shaft 22 above the conveying belt 2, a driving wheel 44 is arranged between the transmission wheel 43 and the control wheel 41, the driving gear is provided with an independent driving motor (not shown in the figure); when the transmission wheel 43 and the driving wheel 44 are engaged, the conveying belt 2 starts to work and the wet material is lifted; when the control wheel 41 and the driving wheel 44 are engaged, the extrusion component 3 starts to work; through the alternate engagement of the driving wheel 44 with the transmission wheel 43 and the control wheel 41, the alternate start of the conveying belt 2 and the extrusion component 3 is realized; one extrusion-reset cycle is completed. Through the periodic switching of the incomplete gear, the time dislocation and alternate operation of the two actions of conveying and extruding are realized, without additional motors or complex electric control systems, automatic coordinated operation can be realized, the structure is compact, the cost is low, and the maintenance is convenient. Specifically, the transmission wheel 43 and the control wheel 41 are both complete gears, and the driving wheel 44 is an incomplete gear; the incomplete gear has gear teeth with a circumferential one-fourth arc length, in each rotation period of the incomplete gear, the toothed part is engaged with the control wheel 41 to drive the control wheel 41 to rotate at least one revolution; when the driving wheel 44 rotates, the incomplete tooth part periodically engages with the transmission wheel 43 and the control wheel 41 alternately to realize the alternate driving of the two; at the same time, the transmission relationship between the incomplete gear and the control wheel 41 is configured to automatically drive the extrusion component 3 to reset after the driving extrusion component 3 completes the work action.

[0038] In addition, referring to Figure 6 To solve the problem that the plastic fragments are difficult to fall off due to strong surface adhesion at the end of the conveying, the upper transmission shaft 22 is functionally integrated and modified: the transmission shaft 22 above the conveying belt 2 is a blowing shaft 5 (the specific structure can be referred to the vacuum adsorption roller), the blowing shaft 5 comprises a ring-shaped shaft body 51, an output gas path 52 is arranged on the shaft body 51, the direction of the output gas path 52 is parallel to the axial direction of the shaft body 51, and the output gas path 52 is arranged on the shaft body 51 in a ring shape; the two ends of the shaft body 51 are provided with connecting blocks 53, the connecting blocks 53 are provided with control gas paths; the control block 33 is fixedly arranged on the conveying belt 2; by conveying gas into the control gas path, the directional blowing of the output end of the conveying belt 2 is realized under the cooperation of the output gas path 52, so as to avoid the problem that the fragments are adsorbed on the conveying belt 2 and are difficult to fall off. The direction of the gas flow is consistent with or at a certain angle with the running direction of the conveying belt 2, auxiliary blowing force can be applied when the material reaches the discharge end, the water film adsorption force between the fragments and the screen is effectively destroyed, the "net blocking" and "net sticking" phenomena are prevented, the material is smoothly discharged, and the conveying efficiency and the automatic continuity are improved.

[0039] Embodiment two

[0040] The embodiment discloses a plastic film recycling equipment, compared with the embodiment one, the embodiment focuses on the optimized design of the movement mode of the extrusion dehydration mechanism, especially for the complex working conditions such as uneven distribution, loose stacking or local accumulation of wet plastic fragments on the conveying belt 2, the uniformity and adaptability of the pressing dehydration are improved.

[0041] In the embodiment, the moving direction of the extrusion block 31 is along the normal direction of the surface of the conveying belt 2, and the extrusion surface is located at the bottom end of the extrusion block 31 and faces the side surface of the conveying belt 2; when the extrusion block 31 is vertically pressed down, uniform pressure is applied to the material, overall pressing from top to bottom is realized, dehydration is more uniform, and it is suitable for the working conditions of loose material distribution or uneven thickness.

[0042] Further, in order to realize the smooth conversion of the vertical extrusion action, the extrusion block 31 is provided with a control block 33, the control block 33 is movably arranged on the cleaning pool 1 or the conveying belt 2, the moving direction of the control block 33 is perpendicular to the moving direction of the extrusion block 31, and the contact surfaces of the extrusion block 31 and the control block 33 are both obliquely arranged; the control block 33 is connected with the connecting rod 42, and the control block 33 is driven to move by the driving part 4, under the action of the contact surface, the extrusion block 31 is vertically pressed down, the conversion of the moving direction is realized, the structure is simple and the operation is reliable. By optimizing the extrusion block 31 to be vertically pressed down, and combining with the movement conversion mechanism driven by the inclined surface, efficient, uniform and controllable pressing dehydration of the wet plastic fragments is realized, which is especially suitable for actual working conditions with variable material state. The design not only improves the dehydration performance, but also enhances the stability and automation degree of the equipment operation, further reduces the energy consumption and water treatment burden of the subsequent drying process, and has significant technical progress and practical value.

[0043] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A plastic film recycling device for cleaning and recycling of plastic film after crushing, characterized in that: it comprises a cleaning tank, the end of the cleaning tank is provided with a conveyor belt arranged obliquely, the conveyor belt is provided with water filtering holes, and the conveyor belt is equipped with an extrusion component; the crushed pieces after cleaning are taken out from the cleaning tank through the conveyor belt, and the pieces are quickly drained from the cleaning tank under the action of the oblique conveyor belt and the water filtering holes; then the taken-out pieces are extruded by the extrusion component, so as to accelerate the speed of water drainage of the pieces and ensure the smooth progress of the subsequent recycling steps; the extrusion component is equipped with a driving component, the driving component comprises a control wheel and a connecting rod, one end of the connecting rod is rotationally connected to the eccentric part of the control wheel, and one end of the connecting rod is rotationally connected to the extrusion component; when the control wheel rotates, the extrusion component is driven to perform extrusion work under the action of the connecting rod; the conveyor belt comprises a belt and a transmission shaft, a transmission wheel is arranged on the transmission shaft above the conveyor belt, and a driving wheel is arranged between the transmission wheel and the control wheel; when the transmission wheel and the driving wheel are engaged, the conveyor belt starts; when the control wheel and the driving wheel are engaged, the extrusion component starts; the transmission wheel and the control wheel are alternately engaged through the driving wheel, so as to realize the alternate starting of the conveyor belt and the extrusion component; the transmission wheel and the control wheel are both complete gears, and the driving wheel is an incomplete gear; the incomplete gear has a toothed portion with a circumferential one-fourth arc length, and in each rotation period of the incomplete gear, the toothed portion is engaged with the control wheel to drive the control wheel to rotate at least one revolution; when the driving wheel rotates, the incomplete toothed portion is periodically engaged with the transmission wheel and the control wheel alternately to realize the alternate driving of the two; at the same time, the transmission relationship between the incomplete gear and the control wheel is configured to automatically drive the extrusion component to reset after the driving extrusion component completes the work action.

2. The plastic film recycling device according to claim 1, characterized in that: the extrusion component comprises an extrusion block, the extrusion surface of the extrusion block is parallel to the conveying surface of the conveyor belt, and the extrusion block is movably arranged on the cleaning tank or the conveyor belt; when the conveyor belt is running, the extrusion block is away from the conveyor belt to avoid affecting the piece fishing work of the conveyor belt; when the conveyor belt stops the piece fishing work, the extrusion block is close to the conveyor belt to extrude the fished pieces to accelerate the speed of water drainage of the pieces.

3. The plastic film recycling device according to claim 2, characterized in that: the conveying surface of the conveyor belt is provided with an extrusion plate away from the extrusion block; dehydration of the conveyor belt is realized under the action of the extrusion plate and the extrusion block.

4. The plastic film recycling device according to claim 3, characterized in that: ​ The extrusion block is arranged on one side of the conveying belt in a sliding manner along a horizontal direction, and the extrusion surface is located on the side of the extrusion block and faces the side surface of the conveying belt; The extrusion block is connected with the connecting rod, and the extrusion block is driven by the driving component to move horizontally, and the extrusion block and the extrusion plate jointly clamp the plastic pieces on the conveying belt to realize lateral squeezing dehydration.

5. The plastic film recycling device according to claim 4, wherein: The moving direction of the extrusion block is along the normal direction of the surface of the conveying belt, and the extrusion surface is located at the bottom end of the extrusion block and faces the side surface of the conveying belt; When the extrusion block is vertically pressed down, the plastic pieces on the conveying belt are uniformly squeezed and dehydrated.

6. The plastic film recycling device according to claim 5, wherein: The extrusion block is provided with a control block, the control block is arranged on the cleaning tank or the conveying belt in a moving manner, the moving direction of the control block is perpendicular to the moving direction of the extrusion block, and the contact surfaces of the extrusion block and the control block are both arranged in an inclined manner; The control block is connected with the connecting rod, and the control block is driven by the driving component to move, and under the action of the contact surface, the extrusion block is vertically pressed down.

7. The plastic film recycling device according to claim 6, wherein: The transmission shaft above the conveying belt is a blowing shaft, the blowing shaft includes a shaft body arranged in a ring shape, the shaft body is provided with an output gas path, the running direction of the output gas path is parallel to the axial direction of the shaft body, and the output gas path is arranged on the shaft body in a ring shape; the both ends of the shaft body are provided with connecting blocks, and the connecting blocks are provided with control gas paths; By conveying gas into the control gas path, directional blowing of the output end of the conveying belt is realized under the cooperation of the output gas path, and the problem that the pieces are difficult to fall off due to being adsorbed on the conveying belt is avoided.

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