A pneumatic extrusion type waste plastic film packing machine

Abstract

The utility model discloses a kind of pneumatic extrusion type waste plastic film packing machines, comprising: connecting frame and support frame, conveyor is drivenly installed in connecting frame, the upper surface of connecting frame both ends are extended and installed with intercepting plate and slide on the surface of conveyor both ends, support frame is at the upper end of conveyor one side and is fixedly connected with intercepting plate, two groups of intercepting plate are fixedly installed with inclined slide, inclined slide is slid on the surface of conveyor and another end can be opposite with the storage port of discharging mechanism, discharging mechanism is rotatably installed at the lower surface of support frame and is fixedly connected with connecting frame.The design of the application, the weight of material in compression port is monitored in real time by weighing sensor on the ring frame, ensure that each piece of compression material specification is uniform, simultaneously relying on step motor drive ring disc to drive double compression port alternation operation, without waiting to unload can open next round process, completely eliminate process gap.

Description

Technical Field

[0001] This utility model relates to the field of plastic film recycling technology, specifically a pneumatic extrusion type waste plastic film baler. Background Technology

[0002] Plastic film is a common household item. It has advantages such as good transparency, good moisture resistance, excellent heat resistance, ease of use, and low price, so it is widely used in various industries. In the production process of plastic film, defective products and waste are inevitable, and these wastes are generally recycled and reprocessed.

[0003] For example, patent CN219076225U discloses a plastic film waste recycling and compression device, including a base, a support frame fixedly installed on the top of the base, a pressing box fixedly installed inside the support frame, and openings at both ends of the pressing box. A lifting and bearing component for opening or closing the lower opening of the pressing box is provided on the support frame below the pressing box, and a compression component for compressing plastic film waste is provided on the support frame above the pressing box. A feeding component for adding plastic film waste into the pressing box is provided on one side of the top of the pressing box. This utility model has a reasonable structural design, is easy to operate, and can compress plastic film waste to form plastic film blocks that are easy to transport and store, and are convenient and quick to recycle.

[0004] However, the aforementioned plastic film waste recycling and compression device opens and closes the lower opening of the compression box by lifting the bearing component. After compression, the material blocks need to be manually transferred from the bearing component to the subsequent transportation equipment. It lacks an automated unloading mechanism. Since the compressed plastic film blocks still have a certain degree of elasticity, they are easy to scatter during manual handling. Moreover, the single unloading efficiency is low and cannot be connected with assembly line operations. In addition, the bearing component is not equipped with a weighing function, so it is impossible to accurately control the weight of each piece of material, resulting in inconsistent packaging specifications and increased warehousing and transportation costs. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic extrusion type waste plastic film baler to solve the problems mentioned in the background art, such as low efficiency of manual unloading, easy scattering of material blocks, lack of weighing function leading to inconsistent baling specifications, and inability to connect with assembly line operations.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pneumatic extrusion-type waste plastic film baler includes: a connecting frame and a support frame. A conveyor is driven and installed inside the connecting frame. Both ends of the upper surface of the connecting frame are extended and mounted with intercepting plates that slide against the two ends of the conveyor surface. The support frame is located on one side of the upper end of the conveyor and is fixedly connected to the intercepting plates. An inclined slide plate is fixedly installed between the two sets of intercepting plates. The inclined slide plate slides against the surface of the conveyor and its other end is opposite to the storage port of the unloading mechanism. The unloading mechanism is rotatably mounted on the lower surface of the support frame and fixedly connected to the connecting frame, thereby enabling the conveyor to transport waste plastic into the unloading mechanism through the inclined slide plate.

[0008] Preferably, a guide cylinder is fixedly installed inside the support frame, and an extrusion block is slidably installed inside the guide cylinder. The upper surface of the extrusion block is fixedly connected to the piston rod of the first cylinder, and the first cylinder is fixedly installed at the top inside the support frame.

[0009] Preferably, the extrusion block is perpendicular to the storage end of the unloading mechanism, so that the extrusion block can be pushed into the unloading mechanism by the piston rod of the first cylinder to compress the waste plastic into a block.

[0010] Preferably, an extension plate is fixedly installed on the upper surface of the extrusion block, so that when the extension plate descends vertically with the extrusion block and is extruded into the unloading mechanism, the extrusion block will drive the extension plate to intercept at one end of the conveyor to prevent waste plastic from falling onto the upper surface of the extrusion block.

[0011] Preferably, the unloading mechanism includes a U-shaped ring frame, which is fixedly installed on one end of the lower surface of the connecting frame and extends from the lower end of the guide cylinder within the support frame. A ring disc is rotatably installed inside the U-shaped ring frame, and compression ports are provided at both ends of the ring disc, so that the compression ports can be connected to the guide cylinder and perpendicular to the extrusion block through the rotation of the ring disc.

[0012] Preferably, when the compression port is rotated by the ring disc to be perpendicular to the extrusion block, it will be aligned with the inclined slide plate.

[0013] Preferably, a weighing sensor is embedded and fixedly installed on the upper surface of the U-shaped ring frame. When the compression port is rotated by the ring disc to be perpendicular to the extrusion block, the weighing sensor will be located at the lower end of this set of compression ports and perpendicular to it.

[0014] Preferably, the upper surface of the ring disk is fixedly connected to the output shaft of the stepper motor, and the stepper motor is fixedly mounted at one end of the guide cylinder.

[0015] Preferably, one end of the U-shaped ring frame is provided with a discharge port, which is perpendicular to and connected to the compression port driven by the ring disc. The upper end of the discharge port is perpendicular to the push plate fixedly installed on the lower surface of the piston rod of the second cylinder. The second cylinder is fixedly installed on the upper surface of the L-shaped plate, and the L-shaped plate is fixedly installed on one end of the upper surface of the U-shaped ring frame.

[0016] Preferably, the signal transmitting end of the weighing sensor is connected to the signal receiving end of the controller, and the stepper motor, the first cylinder and the second cylinder are all controlled by the controller, which is integrated into the conveyor for controlling start and stop.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The weight of the material in the compression port is monitored in real time by the weighing sensor on the U-shaped ring frame. Once the weight reaches the target, the conveyor is automatically stopped and the compression action is triggered to ensure that the specifications of each compressed material are uniform and to avoid errors in manual weight estimation. At the same time, the ring disk driven by the stepper motor drives the dual compression ports to work alternately. After one set of compression ports completes the compression, it rotates to the discharge port and is automatically discharged by the second cylinder. The other set of empty compression ports simultaneously connects to the inclined slide for feeding. The next round of the process can be started without waiting for the discharge, which completely eliminates the gap between processes. This not only ensures the packaging accuracy and reduces the subsequent storage and transportation costs, but also greatly increases the processing capacity per unit time. It realizes the fully automated continuous operation of the "feeding-weighing-compression-discharging" process, which is suitable for the high-efficiency operation needs of large-scale waste plastic film recycling. Attached Figure Description

[0019] Figure 1 This is a top view of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model from a bottom view;

[0021] Figure 3 This is a schematic diagram of the overall side cross-section of this utility model;

[0022] Figure 4 This is a schematic diagram of the unloading mechanism of this utility model.

[0023] In the diagram: 1. Connecting frame; 101. Interceptor plate; 102. Conveyor; 103. Inclined slide plate; 104. Support frame; 105. Guide cylinder; 106. First cylinder; 107. Extrusion block; 108. Extension plate; 2. Unloading mechanism; 201. U-shaped ring frame; 202. L-shaped plate; 203. Second cylinder; 204. Stepper motor; 205. Ring disc; 206. Compression port; 207. Weighing sensor; 208. Unloading port. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 This embodiment provides the following technical solution:

[0026] like Figures 1-2 As shown, a pneumatic extrusion type waste plastic film baler includes: a connecting frame 1 and a support frame 104. A conveyor 102 is installed inside the connecting frame 1. Both ends of the upper surface of the connecting frame 1 are extended and mounted with intercepting plates 101, which slide against the two ends of the surface of the conveyor 102. The support frame 104 is located on one side of the upper end of the conveyor 102 and is fixedly connected to the intercepting plates 101. An inclined slide plate 103 is fixedly installed between the two sets of intercepting plates 101. The inclined slide plate 103 slides against the surface of the conveyor 102 and its other end can be opposite to the storage port of the unloading mechanism 2. The unloading mechanism 2 is rotatably installed on the lower surface of the support frame 104 and is fixedly connected to the connecting frame 1, so that the conveyor 102 can transport waste plastic into the unloading mechanism 2 through the inclined slide plate 103.

[0027] A guide cylinder 105 is fixedly installed inside the support frame 104, and a compression block 107 is slidably installed inside the guide cylinder 105. The upper surface of the compression block 107 is fixedly connected to the piston rod of the first cylinder 106, which is fixedly installed at the top of the support frame 104. The compression block 107 is perpendicular to the storage end of the unloading mechanism 2, allowing it to be pushed into the unloading mechanism 2 by the piston rod of the first cylinder 106 to compress waste plastic into blocks. An extension plate 108 is fixedly installed on the upper surface of the compression block 107. When the extension plate 108 descends vertically with the compression block 107 into the unloading mechanism 2, it will intercept the extension plate 108 at one end of the conveyor 102 to prevent waste plastic from falling onto the upper surface of the compression block 107.

[0028] Through the design of the conveyor 102, inclined slide plate 103, support frame 104, guide cylinder 105, first cylinder 106, extrusion block 107, and unloading mechanism 2, when the equipment is started, the waste plastic film to be processed is first placed onto the conveyor 102 in the connecting frame 1. The conveyor 102 drives the waste plastic film to move along the conveying direction through transmission. During this process, the intercepting plates 101 at both ends of the upper surface of the connecting frame 1 are always slidably attached to both ends of the surface of the conveyor 102, which can effectively prevent the waste plastic film from shifting to the sides or falling during the conveying process, ensuring that the material always moves along the central area of ​​the conveyor 102. As the conveyor 102 continues to convey, the waste plastic film will gradually come into contact with the inclined slide plate fixed between the two sets of intercepting plates 101. The inclined slide plate 103, due to its sloping surface attached to the conveyor 102 and its inclined setting, allows waste plastic film to slide along the inclined surface of the slide plate 103 under the pushing force of the conveyor 102 and the guiding action of the inclined slide plate 103. It then precisely enters the storage port of the unloading mechanism 2, opposite to the other end of the inclined slide plate 103, completing the automatic material conveying and feeding process. When a certain amount of waste plastic film is collected at the storage end of the unloading mechanism 2, the first cylinder 106, fixedly installed at the top of the support frame 104, is activated. The piston rod of the first cylinder 106 extends downward, pushing the compression block 107, which is fixedly connected to it, to slide down along the inner wall of the guide cylinder 105 fixedly installed within the support frame 104. Because the compression block 107 and the storage end of the unloading mechanism 2... Vertically opposite, as the extrusion block 107 continues to descend, it gradually extends into the storage end of the unloading mechanism 2, applying vertical extrusion force to the waste plastic film stored therein. During the downward extrusion process, the extension plate 108 fixedly mounted on the upper surface of the extrusion block 107 descends vertically synchronously with it. When the extrusion block 107 is about to enter the storage end of the unloading mechanism 2, the extension plate 108 moves precisely to the end of the conveyor 102 closest to the unloading mechanism 2 and intercepts it at that position. At this time, the extension plate 108 prevents subsequent waste plastic film to be conveyed on the conveyor 102 from continuing to move towards the unloading mechanism 2, avoiding subsequent material falling onto the upper surface of the extrusion block 107 during the extrusion process and preventing it from affecting... The normal lifting and lowering action and compression effect of the extrusion block 107: As the piston rod of the first cylinder 106 continues to extend, the compression depth of the extrusion block 107 in the storage end of the unloading mechanism 2 continuously increases, and the compression force on the waste plastic film also gradually increases. This causes the loose waste plastic film to continuously shrink in volume under the action of compression force, and finally be compressed into a compact block material. When the compression process reaches the preset compression degree, the piston rod of the first cylinder 106 will drive the extrusion block 107 and the extension plate 108 to synchronously return to their original positions. The extension plate 108 moves away from one end of the conveyor 102, releasing the obstruction of subsequent materials. The conveyor 102 can continue to transport waste plastic film to the unloading mechanism 2. At the same time, the compressed block material remains in the unloading mechanism 2.The unloading mechanism 2 completes the subsequent transfer or unloading of block materials, thus completing a single cycle of extruding and baling waste plastic film. The equipment can then proceed to the next feeding and extrusion process, achieving continuous waste plastic film baling.

[0029] like Figures 3-4 As shown, the unloading mechanism 2 includes a U-shaped ring frame 201. The U-shaped ring frame 201 is fixedly installed on one end of the lower surface of the connecting frame 1 and extends from the lower end of the guide cylinder 105 inside the support frame 104. A ring disc 205 is rotatably installed inside the U-shaped ring frame 201. Both ends of the ring disc 205 are provided with compression ports 206, so that the compression ports 206 can be connected to the guide cylinder 105 through the rotation of the ring disc 205 and are perpendicular to the extrusion block 107.

[0030] When the compression port 206 rotates with the ring disc 205 to a position perpendicular to the extrusion block 107, it will also be aligned with the inclined slide plate 103. A weighing sensor 207 is embedded and fixedly mounted on the upper surface of the U-shaped ring frame 201. When the ring disc 205 drives the compression port 206 to rotate to a position perpendicular to the extrusion block 107, the weighing sensor 207 will be positioned at the lower end of this set of compression ports 206 and perpendicular to it. The upper surface of the ring disc 205 is fixedly connected to the output shaft of the stepper motor 204, which is fixedly mounted at one end of the guide cylinder 105. The U-shaped ring frame 201 has a discharge port 208 at one end. The discharge port 208 allows the ring disc 205 to drive the compression port 206, which is perpendicular to and connected to it. The upper end of the discharge port 208 is perpendicular to the push plate fixedly installed on the lower surface of the piston rod of the second cylinder 203. The second cylinder 203 is fixedly installed on the upper surface of the L-shaped plate 202, which is fixedly installed on one end of the upper surface of the U-shaped ring frame 201.

[0031] The signal transmitter of the load cell 207 is connected to the signal receiver of the controller. The stepper motor 204, the first cylinder 106 and the second cylinder 203 are all controlled by the controller. The controller is integrated on the conveyor 102 to control the start and stop. The load cell 207 can be a TSC-100 type load cell, and the controller can be an S7-200SMARTSR40 type controller.

[0032] Through the design of the U-shaped ring frame 201, the second cylinder 203, the stepper motor 204, the ring disk 205, the compression port 206, the weighing sensor 207, and the discharge port 208, the ring disk 205 rotates within the U-shaped ring frame 201. The compression ports 206 at both ends of the ring disk 205 can connect with the guide cylinder 105 through the rotation of the ring disk 205 and are perpendicularly opposite to the extrusion block 107. Simultaneously, the compression ports 206 are also opposite to the inclined slide plate 103. The waste plastic film conveyed by the conveyor 102 to the inclined slide plate 103 will accurately fall into the compression port 206. During this process, the weighing sensor 207, which is embedded in the upper surface of the U-shaped ring frame 201, is precisely positioned at the compression port 206 when the compression port 206 is perpendicularly opposite to the extrusion block 107. At the lower end and perpendicular to it, the weighing sensor 207 will detect the weight of the waste plastic film in the compression port 206 in real time and transmit the weight signal to the controller integrated on the conveyor 102. When the controller receives the weight signal from the weighing sensor 207 and it reaches the preset value, the controller will first control the conveyor 102 to stop feeding, thereby avoiding the problem of "material blocks that are too light and need to be replenished, and material blocks that are too heavy and easily loose" caused by manual feeding. The uniformly sized compressed blocks are not only convenient for subsequent bundling and stacking during storage, reducing storage space waste, but also reduce sorting costs during transportation. There is no need to re-sort the blocks due to weight differences. The transportation volume can be directly calculated according to fixed specifications, improving logistics efficiency. Then, the first cylinder 10 at the top of the support frame 104 is controlled. 6. Upon startup, the piston rod of the first cylinder 106 pushes the extrusion block 107 down the guide cylinder 105, extending into the compression port 206 to extrude the waste plastic film. Simultaneously, the extension plate 108 on the extrusion block 107 descends and intercepts at one end of the conveyor 102 to prevent subsequent material from falling. After extrusion is completed, the controller controls the first cylinder 106 to reset the extrusion block 107 and the extension plate 108. Then, it controls the stepper motor 204 fixed at one end of the guide cylinder 105 to start. The output shaft of the stepper motor 204 drives the ring disc 205 to rotate within the U-shaped ring frame 201, causing the compression port 206 containing the compressed material to rotate from a position opposite to the guide cylinder 105 to a position opposite to and connected to the discharge port 208 at one end of the U-shaped ring frame 201. Simultaneously, the empty compression port 206 at the other end of the ring disc 205 rotates to a position opposite to the guide cylinder 105 and the inclined slide plate 103, preparing for the next feeding. When the compression port 206 containing the compressed block aligns with the discharge port 208, the controller controls the second cylinder 203 fixed on the L-shaped plate 202 on the upper surface of the U-shaped ring frame 201 to start. The piston rod of the second cylinder 203 drives the pusher plate downward, pushing the blocky material in the compression port 206 out through the discharge port 208, completing the automatic unloading. After unloading is completed, the controller controls the second cylinder 203 to drive the pusher plate to reset, and at the same time controls the stepper motor 204 to start again, driving the ring disc 205 to rotate, so that the empty compression port 206 returns to the position opposite to the guide cylinder 105 and the inclined slide plate 103.The controller then restarts the conveyor 102 to begin feeding, initiating the next packaging cycle. This alternating operation mode completely eliminates the time gap where a single compression port 206 must wait for unloading to complete before re-feeding, ensuring seamless connection between the feeding, compression, and unloading processes. Compared to a single compression port 206 design, this significantly improves operational efficiency, resulting in a substantial increase in the amount of waste plastic film processed per unit time.

[0033] Based on the above technical solution, the working steps of this solution are summarized as follows: After the equipment is started, the waste plastic film to be processed is first placed onto the conveyor 102 in the connecting frame 1. The conveyor 102 drives the waste plastic film to move along the conveying direction through transmission. During this process, the intercepting plates 101 at both ends of the upper surface of the connecting frame 1 are always slidably attached to both ends of the surface of the conveyor 102, which can effectively prevent the waste plastic film from shifting to the sides or falling during the conveying process, ensuring that the material always moves along the central area of ​​the conveyor 102. As the conveyor 102 continues to convey, the waste plastic film will gradually come into contact with the inclined slide plate 103 fixedly installed between the two sets of intercepting plates 101. Since the inclined slide plate 103 is slidably attached to the surface of the conveyor 102 and is inclined, Under the pushing force of the conveyor 102 and the guiding action of the inclined slide 103, the waste plastic film slides along the inclined surface of the slide 103 and finally enters the compression port 206 opposite to the other end of the slide 103 precisely. During this process, because the weighing sensor 207 embedded in the upper surface of the U-shaped ring frame 201 is located at the lower end of the compression port 206 and perpendicular to it when the compression port 206 is perpendicular to the extrusion block 107, the weighing sensor 207 will detect the weight of the waste plastic film in the compression port 206 in real time and transmit the weight signal to the controller integrated on the conveyor 102. When the controller receives the weight signal from the weighing sensor 207 and it reaches the preset value, the controller will first control the conveyor 102. 2. Stop feeding, then start the first cylinder 106 at the top of the support frame 104. The piston rod of the first cylinder 106 pushes the extrusion block 107 down the guide cylinder 105 and into the compression port 206 to extrude the waste plastic film. At the same time, the extension plate 108 on the extrusion block 107 descends synchronously to intercept one end of the conveyor 102 to prevent subsequent material from falling. After extrusion is completed, the controller controls the first cylinder 106 to reset the extrusion block 107 and the extension plate 108. Then, it controls the stepper motor 204 fixed at one end of the guide cylinder 105 to start. The output shaft of the stepper motor 204 drives the ring disc 205 to rotate in the U-shaped ring frame 201, causing the compression port 206 containing the compressed material to rotate from the position opposite to the guide cylinder 105 to... The discharge port 208 at one end of the U-shaped ring frame 201 is aligned with and connected to the discharge port 208. Simultaneously, the empty compression port 206 at the other end of the ring disc 205 rotates to a position opposite to the guide cylinder 105 and the inclined slide plate 103, preparing for the next feeding. When the compression port 206 containing the compressed material aligns with the discharge port 208, the controller activates the second cylinder 203 fixed to the L-shaped plate 202 on the upper surface of the U-shaped ring frame 201. The piston rod of the second cylinder 203 drives the pusher plate downwards, pushing the blocky material in the compression port 206 through the discharge port 208, completing the automatic unloading. After unloading, the controller controls the second cylinder 203 to reset the pusher plate and simultaneously activates the stepper motor 204 again, causing the ring disc 205 to rotate.The empty compression port 206 is returned to its position opposite to the guide cylinder 105 and the inclined slide plate 103. The controller then controls the conveyor 102 to restart feeding, entering the next packaging cycle.

[0034] In summary: The weighing sensor 207 embedded in the U-shaped ring frame 201 can monitor the weight of the material in the compression port 206 in real time. Once the weight reaches the target, the conveyor 102 is automatically triggered to stop and compress the material, ensuring that the weight error of each compressed material is minimal and the specifications are uniform. This reduces additional costs for subsequent storage, stacking, transportation, and sorting. At the same time, the stepper motor 204 drives the ring disk 205 to rotate the dual compression ports 206. After one set of compression ports 206 completes the compression, it rotates to the discharge port 208 for automatic unloading. The other set of empty compression ports 206 simultaneously connects to the inclined slide plate 103 for feeding. The next round of feeding can start without waiting for unloading, eliminating process gaps. This not only ensures the accuracy of the material specifications but also significantly improves the overall operating efficiency of the equipment, achieving a synergistic operation of "precision" and "efficiency".

[0035] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic extrusion-type waste plastic film baler, characterized in that, include: A connecting frame (1) and a support frame (104) are provided. A conveyor (102) is installed inside the connecting frame (1). Both ends of the upper surface of the connecting frame (1) are extended and mounted with interceptor plates (101) and slide against the two ends of the surface of the conveyor (102). The support frame (104) is located on one side of the upper end of the conveyor (102) and is fixedly connected to the interceptor plates (101). An inclined slide plate (103) is fixedly installed between the two sets of interceptor plates (101). The inclined slide plate (103) slides against the surface of the conveyor (102) and its other end is opposite to the storage port of the unloading mechanism (2). The unloading mechanism (2) is rotatably installed on the lower surface of the support frame (104) and is fixedly connected to the connecting frame (1), so that the conveyor (102) can transport waste plastic into the unloading mechanism (2) through the inclined slide plate (103).

2. The pneumatic extrusion-type waste plastic film baler according to claim 1, characterized in that: A guide cylinder (105) is fixedly installed inside the support frame (104), and an extrusion block (107) is slidably installed inside the guide cylinder (105). The upper surface of the extrusion block (107) is fixedly connected to the piston rod of the first cylinder (106), and the first cylinder (106) is fixedly installed at the top inside the support frame (104).

3. The pneumatic extrusion-type waste plastic film baler according to claim 2, characterized in that: The extrusion block (107) is perpendicular to the storage end of the unloading mechanism (2), so that the extrusion block (107) can be pushed into the unloading mechanism (2) by the piston rod of the first cylinder (106) to compress the waste plastic into a block.

4. A pneumatic extrusion-type waste plastic film baler according to claim 3, characterized in that: An extension plate (108) is fixedly installed on the upper surface of the extrusion block (107). When the extension plate (108) descends vertically with the extrusion block (107) and is extruded into the unloading mechanism (2), the extrusion block (107) will drive the extension plate (108) to intercept at one end of the conveyor (102) to prevent waste plastic from falling onto the upper surface of the extrusion block (107).

5. A pneumatic extrusion-type waste plastic film baler according to claim 1, characterized in that: The unloading mechanism (2) includes a U-shaped ring frame (201). The U-shaped ring frame (201) is fixedly installed on one end of the lower surface of the connecting frame (1) and extends from it to the lower end of the guide cylinder (105) inside the support frame (104). A ring disc (205) is rotatably installed inside the U-shaped ring frame (201). Both ends of the ring disc (205) are provided with compression ports (206), so that the compression ports (206) can be connected to the guide cylinder (105) and perpendicular to the extrusion block (107) through the rotation of the ring disc (205).

6. A pneumatic extrusion-type waste plastic film baler according to claim 5, characterized in that: When the compression port (206) is rotated by the ring disc (205) to be perpendicular to the extrusion block (107), it will be opposite to the inclined slide plate (103).

7. A pneumatic extrusion-type waste plastic film baler according to claim 5, characterized in that: The upper surface of the U-shaped ring frame (201) is embedded with a weighing sensor (207). When the ring disc (205) drives the compression port (206) to rotate to be perpendicular to the extrusion block (107), the weighing sensor (207) will be located at the lower end of the compression port (206) and perpendicular to it.

8. A pneumatic extrusion-type waste plastic film baler according to claim 7, characterized in that: The upper surface of the ring disk (205) is fixedly connected to the output shaft of the stepper motor (204), and the stepper motor (204) is fixedly installed at one end of the guide cylinder (105).

9. A pneumatic extrusion-type waste plastic film baler according to claim 5, characterized in that: The U-shaped ring frame (201) has a discharge port (208) at one end. The discharge port (208) allows the ring disc (205) to drive the compression port (206) to be perpendicular to and connected to it. The upper end of the discharge port (208) is perpendicular to the push plate fixedly installed on the lower surface of the piston rod of the second cylinder (203). The second cylinder (203) is fixedly installed on the upper surface of the L-shaped plate (202). The L-shaped plate (202) is fixedly installed on one end of the upper surface of the U-shaped ring frame (201).

10. A pneumatic extrusion-type waste plastic film baler according to claim 8, characterized in that: The signal transmitting end of the weighing sensor (207) is connected to the signal receiving end of the controller. The stepper motor (204), the first cylinder (106) and the second cylinder (203) are all controlled by the controller, which is integrated on the conveyor (102) for controlling start and stop.

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