A recycling shearing device for long strip-shaped plastics

Abstract

This utility model relates to a recycling and shearing device for elongated plastic strips, belonging to the field of plastic recycling technology. The recycling and shearing device for elongated plastic strips includes a pressing and conveying mechanism, a traction mechanism, and a shearing mechanism. The pressing and conveying mechanism includes a first conveyor belt and a second conveyor belt. The second conveyor belt is spaced above the first conveyor belt, forming a pressing space between them. The first and second conveyor belts have opposite transmission directions. The traction mechanism is located between the pressing and conveying mechanism and the shearing mechanism, and is used to pull the elongated plastic strips processed by the pressing and conveying mechanism into the shearing mechanism for shearing. This utility model's recycling and shearing device for elongated plastic strips completes the pre-crushing and recycling of elongated plastic strips through pressing, traction, and shearing (pre-crushing), facilitating subsequent crushing and recycling.

Description

Technical Field

[0001] This utility model relates to the field of plastic recycling technology, and in particular to a recycling shearing device for long strip-shaped plastics. Background Technology

[0002] During the production of plastic films and sheets, factors such as machine shutdowns and restarts, production changes, process adjustments, and film breakage generate a large amount of long strips of plastic film and sheets awaiting processing and recycling. These long strips of plastic typically appear in irregular shapes during production and become entangled in various irregular forms after cooling. During subsequent crushing and recycling, their irregular shape makes them prone to getting stuck in the crushing drum, hindering the crushing process. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a recycling and shearing device for long strip-shaped plastics, which can compress, pull and shear (pre-crush) long strip-shaped plastics to cut them into shorter lengths and smaller volumes, so as to facilitate subsequent crushing and recycling.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a recycling and shearing device for long strip-shaped plastics, including a pressing and conveying mechanism, a traction mechanism, and a shearing mechanism; the pressing and conveying mechanism includes a first conveyor belt and a second conveyor belt; the second conveyor belt is spaced above the first conveyor belt, forming a pressing space between them; the first conveyor belt and the second conveyor belt have opposite transmission directions; the traction mechanism is disposed between the pressing and conveying mechanism and the shearing mechanism, and the traction mechanism is used to pull the long strip-shaped plastics processed by the pressing and conveying mechanism into the shearing mechanism for shearing.

[0006] The recycling and shearing device for elongated plastic strips described in this invention, under the action of a first conveyor belt and a second conveyor belt, conveys the elongated plastic strips through the pressing space between the first and second conveyor belts, compressing the loose elongated plastic strips to be recycled (i.e., compressing the volume of the elongated plastic strips). Then, the compressed elongated plastic strips are pulled to the shearing mechanism by the traction mechanism for shearing, so as to cut (pre-crush) the elongated plastic strips into plastic strips with shorter lengths and smaller volumes. The recycling and shearing device for elongated plastic strips described in this invention completes the pre-crushing and recycling of elongated plastic strips by compressing, pulling, and shearing (pre-crushing), which facilitates subsequent crushing and recycling and prevents blockages at the feed inlet or cylinder wall of the crushing device due to excessive plastic length or volume during subsequent crushing, thus preventing smooth crushing.

[0007] Furthermore, the distance between the first conveyor belt and the second conveyor belt at the outlet of the pressing space is less than the distance between the first conveyor belt and the second conveyor belt at the inlet of the pressing space. By designing the distance between the two conveyor belts at the outlet of the pressing space to be smaller than the distance between the two conveyor belts at the inlet of the pressing space, the volume of the elongated plastic strip can be further compressed after passing through the pressing space.

[0008] Furthermore, the pressing and conveying mechanism also includes a first driving component and a second driving component; the first driving component drives the first conveyor belt to move along a first transmission direction, and the second driving component drives the second conveyor belt to move along a second transmission direction, wherein the first transmission direction and the second transmission direction are opposite. Through the above design, the first driving component drives the first conveyor belt to move along the first transmission direction, and the second driving component drives the second conveyor belt to move along the second transmission direction. With the aid of the conveying action of the first conveyor belt and the conveying assistance of the second conveyor belt, the elongated plastic strip is conveyed through the pressing space, compressing the volume of the elongated plastic strip.

[0009] Furthermore, the traction mechanism includes a first traction roller and a second traction roller, the second traction roller being spaced above the first traction roller and forming a traction space between the first traction rollers; the first traction roller and the second traction roller rotate in opposite directions. The long strip of plastic processed by the pressing and conveying mechanism is tractioned and conveyed between the first traction roller and the second traction roller, facilitating its transfer to the shearing mechanism.

[0010] Furthermore, the traction mechanism also includes a third drive assembly and a fourth drive assembly; the third drive assembly drives the first traction roller to rotate along a first direction; the fourth drive assembly drives the second traction roller to rotate along a second direction; the first direction and the second direction are opposite. This design facilitates the traction and conveying of long strips of plastic to the shearing mechanism.

[0011] Furthermore, the shearing mechanism includes a shearing seat and a shearing blade; the shearing blade is vertically and flexibly positioned above the shearing seat. After being processed by the pressing and conveying mechanism, the long strip of plastic is drawn onto the shearing seat by the traction mechanism; the long strip of plastic is sheared by the lifting and lowering of the shearing blade.

[0012] Furthermore, the shearing mechanism also includes a fifth drive assembly for driving the shearing blade to move up and down. Driving the shearing blade to move up and down via the fifth drive assembly facilitates the shearing of long strips of plastic.

[0013] Furthermore, the shearing mechanism also includes a shearing support; the shearing support is U-shaped, and a vertical guide rod is provided inside the shearing support; the shearing seat is fixedly mounted on the guide rod, and the shearing blade is vertically mounted on the guide rod. The guide rod is used to facilitate the fifth drive assembly to drive the shearing blade to move up and down on the guide rod.

[0014] Furthermore, a fixed seat is fixedly mounted on the guide rod; the shearing seat is fixedly mounted above the fixed seat; a slider seat is vertically slidable on the guide rod; and the shearing blade is fixedly mounted below the slider seat. This structure improves structural stability.

[0015] Furthermore, the fifth drive assembly includes a motor, a first turntable, and a first connecting rod; the motor is fixedly mounted on one side of the shear support, and the output end of the motor is horizontally positioned; the first turntable is fixedly sleeved on the output end of the motor; one end of the first connecting rod is hinged to the first turntable, and the other end of the first connecting rod is hinged to the slider seat; when the motor is started, it drives the first turntable to rotate, and during the rotation of the first turntable, it drives the first connecting rod to move up and down, thereby driving the slider seat to slide up and down under the restriction of the guide rod, thereby driving the shear blade to perform lifting and lowering movements.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the recycling and shearing device for long strip-shaped plastics according to this utility model;

[0018] Figure 2 This is a schematic diagram of the material pressing and conveying mechanism;

[0019] Figure 3 This is a schematic diagram of the migration mechanism;

[0020] Figure 4 This is a schematic diagram of the shearing mechanism;

[0021] In the diagram: 1. Material pressing and conveying mechanism; 10. Material pressing space; 11. First conveyor belt; 12. Second conveyor belt; 13. First drive assembly; 14. Second drive assembly; 15. First support seat; 16. Second support seat; 2. Traction mechanism; 20. Traction space; 21. First traction roller; 22. Second traction roller; 23. Third drive assembly; 24. Fourth drive assembly; 25. First traction support seat; 26. Second traction support seat; 3. Shearing mechanism; 31. Shearing seat; 32. Shearing blade; 33. Fifth drive assembly; 331. Motor; 332. First turntable; 333. First connecting rod; 334. Second turntable; 335. Second connecting rod; 336. Transverse connecting rod; 34. Shearing support seat; 341. Guide rod; 342. Fixed seat; 343. First connecting block; 344. Support column; 345. Slider seat; 346. Second connecting block; 347. Guide insertion rod. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first," "second," "third," etc., used in the specification and claims are only for the purpose of distinguishing the description of the same technical features and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated, nor necessarily the order of description or chronological sequence. Where appropriate, the terms are interchangeable. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0024] Similarly, the term "connection" is used in the specification and claims and should not be construed as limited to a direct connection. Therefore, the expression "device A is connected to device B" should not be limited to device A being directly connected to device B in a device or system; it means that there is a path between device A and device B, which can be a path that includes other devices or tools.

[0025] Example 1

[0026] During the crushing and recycling process, long strip-shaped plastics, due to their irregular shape, are prone to getting stuck in the crushing drum, hindering the crushing process. Therefore, this embodiment provides a recycling shearing device for long strip-shaped plastics, which can compress, pull, and pre-crush (shear) long strip-shaped plastics, cutting them into shorter, smaller pieces for easier subsequent crushing and recycling.

[0027] For the recycling and shearing device for long strip-shaped plastics in this embodiment, please refer to [link to relevant documentation]. Figure 1 It includes a pressing and conveying mechanism 1, a traction mechanism 2, and a shearing mechanism 3. The pressing and conveying mechanism 1 is used to press the long strip of plastic to compress its volume; the traction mechanism 2 is used to pull the long strip of plastic processed by the pressing and conveying mechanism 1 to the shearing mechanism 3; the shearing mechanism 3 is used to shear the long strip of plastic.

[0028] In this embodiment, please refer to Figure 1 and Figure 2 The pressing and conveying mechanism 1 includes a first conveyor belt 11 and a second conveyor belt 12. The second conveyor belt 12 is spaced above the first conveyor belt 11, forming a pressing space 10 between them. The first conveyor belt 11 and the second conveyor belt 12 have opposite transmission directions. When a fluffy, elongated plastic strip is placed on the first conveyor belt 11, the first conveyor belt 11 conveys the elongated plastic strip to the pressing space 10, and with the assistance of the second conveyor belt 12, it passes through the pressing space 10 to compact the fluffy, elongated plastic strip and reduce its volume.

[0029] The recycling and shearing device for long strip-shaped plastics in this embodiment places the long strip-shaped plastics on the first conveyor belt 11 and conveys them between the first conveyor belt 11 and the second conveyor belt 12. Under the conveying action of the first conveyor belt 11 and the second conveyor belt 12, the loose long strip-shaped plastics to be recycled are compressed (i.e., compacted, so that the volume of the long strip-shaped plastics is compressed). Then, the compressed long strip-shaped plastics are pulled to the shearing mechanism 3 by the traction mechanism 2 for shearing, so as to cut the long strip-shaped plastics into plastics with shorter length and smaller volume.

[0030] In this embodiment, the distance between the first conveyor belt 11 and the second conveyor belt 12 at the outlet of the pressing space 10 is smaller than the distance between the first conveyor belt 11 and the second conveyor belt 12 at the entrance of the pressing space 10. Through this design, when the elongated plastic strip passes through the pressing space 10, due to the narrower outlet of the pressing space 10, the volume of the elongated plastic strip can be further compressed (further compacted) at the outlet of the pressing space 10. In this embodiment, the actual interval between the first conveyor belt 11 and the second conveyor belt 12 at the outlet of the pressing space 10 can be set by those skilled in the art according to actual needs, such as 3-5cm, 5-10cm, 10-15cm, 15-20cm, or other intervals required by those skilled in the art, which will not be elaborated here.

[0031] In this embodiment, the first conveyor belt 11 is inclined relative to the horizontal plane. The first conveyor belt 11 is inclined upward from the beginning of the conveying to the end of the conveying. The angle between the first conveyor belt 11 and the horizontal plane is an acute angle (preferably 15-30°). Of course, those skilled in the art can determine other angles according to actual needs, which will not be elaborated here.

[0032] In this embodiment, the conveying length of the first conveyor belt 11 is greater than the conveying length of the second conveyor belt 12. The second conveyor belt 12 is positioned above the first conveyor belt 11 and near the end of the first conveyor belt 11, so that the front end of the first conveyor belt 11 protrudes relatively from the second conveyor belt 12. This facilitates placing the long strip of plastic at this position, and then conveying it into the pressing space 10 under the conveying action of the first conveyor belt 11. With the assistance of the second conveyor belt 12, the long strip of plastic is conveyed and compacted.

[0033] To facilitate the driving of the first conveyor belt 11 and the second conveyor belt 12, in this embodiment, the material pressing and conveying mechanism 1 further includes a first driving assembly 13 and a second driving assembly 14. The first driving assembly 13 drives the first conveyor belt 11 to move along a first driving direction, and the second driving assembly 14 drives the second conveyor belt 12 to move along a second driving direction. The first and second driving directions are opposite. It is understood that both the first conveyor belt 11 and the second conveyor belt 12 are annular conveyor belts, with the first driving direction being either clockwise or counterclockwise, and the second driving direction being either counterclockwise or clockwise. Furthermore, the first driving assembly 13 and the second driving assembly 14 are commonly used conveyor belt driving assemblies in the art, and will not be described in detail here, including structures such as motors and conveyor guide rollers.

[0034] To facilitate the installation of the first conveyor belt 11 and the second conveyor belt 12, in this embodiment, the pressing and conveying mechanism 1 further includes a first support seat 15 and a second support seat 16. The first conveyor belt 11 is rotatably and inclinedly disposed on the top of the first support seat 15, and a first drive assembly 13 is disposed on the first support seat 15, driving the first conveyor belt 11 through the first drive assembly 13. The second support seat 16 is fixedly disposed above the second support seat 16, and the second conveyor belt 12 is rotatably disposed on the second support seat 16. A second drive assembly 14 is disposed on the second support seat 16, driving the second conveyor belt 12 through the second drive assembly 14.

[0035] Please see Figure 1 and Figure 3 In this embodiment, the traction mechanism 2 is located between the pressing and conveying mechanism 1 (the outlet of the pressing space 10) and the shearing mechanism 3. The traction mechanism 2 is used to pull the long strip of plastic processed by the pressing and conveying mechanism 1 into the shearing mechanism 3 for shearing.

[0036] In this embodiment, the traction mechanism 2 includes a first traction roller 21 and a second traction roller 22. The second traction roller 22 is spaced above the first traction roller 21 and forms a traction space 20 (or gap) between it and the first traction roller 21 for the passage of long strip-shaped plastic processed by the pressing and conveying mechanism 1. The rotation directions of the first traction roller 21 and the second traction roller 22 are opposite.

[0037] To facilitate the rotation of the first traction roller 21 and the second traction roller 22, the traction mechanism 2 further includes a third drive assembly 23 and a fourth drive assembly 24. The third drive assembly 23 drives the first traction roller 21 to rotate in a first direction; the fourth drive assembly 24 drives the second traction roller 22 to rotate in a second direction. The first and second directions are opposite. It is understood that the first direction is either clockwise or counterclockwise, and the second direction is either counterclockwise or clockwise. Furthermore, the third drive assembly 23 and the fourth drive assembly 24 are commonly used drive assemblies for traction rollers in the art, and will not be described in detail here. For example, they include structures such as motors, with the motor output connected to one center end of the traction roller, driving the traction roller to rotate via the motor.

[0038] To facilitate the configuration of the first traction roller 21 and the second traction roller 22, in this embodiment, the traction mechanism 2 further includes a first traction support 25 and a second traction support 26. The first traction roller 21 is rotatably mounted on the first traction support 25, and a third drive assembly 23 is mounted on the first traction support 25, driving the first traction roller 21 to rotate. The second traction support 26 is fixedly mounted above the first traction support 25, and the second traction roller 22 is rotatably mounted on the second traction support 26, driving the second traction roller 22 to rotate.

[0039] Please see Figure 1 and Figure 4 The shearing mechanism 3 in this embodiment includes a shearing seat 31 and a shearing blade 32; the shearing blade 32 is vertically and flexibly mounted above the shearing seat 31. After being processed by the pressing and conveying mechanism 1, the long strip of plastic is pulled onto the shearing seat 31 by the traction mechanism 2; the long strip of plastic is sheared by the lifting and pressing of the shearing blade 32.

[0040] In this embodiment, the shearing mechanism 3 further includes a fifth driving component 33, which is used to drive the shearing blade 32 to move up and down to facilitate shearing.

[0041] To facilitate the arrangement of the shearing seat 31, the shearing blade 32, and the fifth drive assembly 33, the shearing mechanism 3 of this embodiment also includes a shearing support seat 34. The shearing support seat 34 is arranged vertically in a U-shape, and two parallel guide rods 341 are arranged vertically inside the shearing support seat 34. The shearing seat 31 is fixedly mounted on the two guide rods 341, and the shearing blade 32 is movably mounted on the guide rods 341 and located above the shearing seat 31. The fifth drive assembly 33 is mounted on the shearing support seat 34 and is used to drive the shearing blade 32 to move up and down.

[0042] To facilitate the fixed mounting of the shear seat 31 on the two guide rods 341, in this embodiment, a fixing seat 342 is fixedly mounted on the two guide rods 341 (wherein, the two ends of the fixing seat 342 are respectively inserted and fixed to the two guide rods 341). The shear seat 31 is fixedly mounted above the fixing seat 342 and located between the two guide rods 341; specifically, the bottom of the shear seat 31 is fixed above the fixing seat 342 by two first connecting blocks 343. In addition, to improve the fixing stability of the fixing seat 342, in this embodiment, the bottom of the fixing seat 342 is fixedly mounted above the bottom of the shear support seat 34 by a support column 344, and the support column 344 is located between the two guide rods 341.

[0043] To facilitate the lifting and lowering of the shearing blade 32 on the two guide rods 341, in this embodiment, a slider seat 345 is vertically slidably mounted on the two guide rods 341 (wherein, the two ends of the slider seat 345 are respectively inserted into and slidably engaged with the two guide rods 341). The shearing blade 32 is fixedly mounted below the slider seat 345 and located between the two guide rods 341; specifically, the bottom of the shearing blade 32 is fixed to the bottom of the slider seat 345 by two second connecting blocks 346. In addition, to improve the stability of the lifting and lowering movement of the slider seat 345, in this embodiment, a guide insertion rod 347 is provided at the top of the slider seat 345, the upper end of the guide insertion rod 347 passes through the top of the shearing support seat 34 and can be lifted and lowered.

[0044] To facilitate the lifting and lowering of the shearing blade 32, in this embodiment, the fifth drive assembly 33 includes a motor 331, a first turntable 332, and a first connecting rod 333. The motor 331 is fixedly mounted on the outer side of one side of the shearing support 34. The output end of the motor 331 extends laterally through one side of the shearing support 34 and into its interior. The first turntable 332 is fixedly sleeved on the output end of the motor 331. One end of the first connecting rod 333 is hinged to the first turntable 332, and the other end is hinged to one end of the slider seat 345. When the motor 331 is started, it drives the first turntable 332 to rotate. During the rotation, the first turntable 332 drives the first connecting rod 333 to move up and down, thereby causing the slider seat 345 to slide up and down under the constraint of the two guide rods 341 and the guide insertion rod 347, thus performing lifting and lowering movements. This drives the shearing blade 32 to cut the long strip of plastic on the shearing seat 31.

[0045] To improve the stability of the shearing blade 32 during lifting and lowering, in this embodiment, a similar driven structure consisting of a second turntable 334 and a second connecting rod 335 is also provided at the other end of the slider seat 345. Specifically, the second turntable 334 is rotatably fixed to the inner side of the other side of the shearing support 34, one end of the second connecting rod 335 is hinged to the second turntable 334, and the other end of the second connecting rod 335 is hinged to the other end of the slider seat 345. By designing the above-mentioned driven structure, the stability of the shearing blade 32 during lifting and lowering is improved.

[0046] To facilitate the up-and-down movement of the first connecting rod 333 during the rotation of the first turntable 332, thereby causing the slider seat 345 to rise and fall, in this embodiment, the hinge position between the first turntable 332 and the first connecting rod 333 should be close to the outer edge of the turntable surface; similarly, the hinge position between the second turntable 334 and the second connecting rod 335 should be close to the outer edge of the turntable surface. Furthermore, in some embodiments, there is a certain lateral gap between the slider seat 345 and the first turntable 332 or the second turntable 334. This can be achieved by fixing a lateral connecting rod 336 on the turntable surface of the first turntable 332 or the second turntable 334, so that the lateral connecting rod 336 is hinged to the first connecting rod 333 or the second connecting rod 335, thereby improving structural stability.

[0047] The recycling and shearing device for long strip-shaped plastics in this embodiment, through the design of the pressing and conveying mechanism 1, the traction mechanism 2, and the shearing mechanism, compresses the loose long strip-shaped plastics to be recycled through the pressing and conveying mechanism 1 (i.e., compacts the plastics, compressing their volume). Then, the traction mechanism 2 pulls the compressed plastics to the shearing mechanism 3 for shearing, cutting the long strip-shaped plastics into shorter, smaller plastics. This completes the pre-crushing and recycling of long strip-shaped plastics, facilitating subsequent crushing and recycling, and preventing blockages at the feed inlet or cylinder wall of the crushing device due to excessive plastic length or volume during subsequent crushing, which would hinder the crushing process.

[0048] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A recycling shearing apparatus for long strip form plastics, characterised in that: The device includes a pressing and conveying mechanism, a traction mechanism, and a shearing mechanism. The pressing and conveying mechanism includes a first conveyor belt and a second conveyor belt. The second conveyor belt is spaced above the first conveyor belt, forming a pressing space between them. The first and second conveyor belts have opposite transmission directions. The traction mechanism is located between the pressing and conveying mechanism and the shearing mechanism. The traction mechanism is used to pull the long strip of plastic processed by the pressing and conveying mechanism into the shearing mechanism for cutting.

2. The recycling and shearing device for elongated plastic strips according to claim 1, characterized in that: The distance between the first conveyor belt and the second conveyor belt at the outlet of the pressing space is less than the distance between the first conveyor belt and the second conveyor belt at the entrance of the pressing space.

3. The recycling and shearing device for elongated plastic strips according to claim 1, characterized in that: The material pressing and conveying mechanism further includes a first driving component and a second driving component; the first driving component is used to drive the first conveyor belt to move along a first transmission direction, and the second driving component is used to drive the second conveyor belt to move along a second transmission direction, wherein the first transmission direction and the second transmission direction are opposite.

4. The recycling and shearing device for elongated plastic strips according to claim 1, characterized in that: The traction mechanism includes a first traction roller and a second traction roller; the second traction roller is spaced above the first traction roller and forms a traction space between them; the first traction roller and the second traction roller rotate in opposite directions.

5. The recycling and shearing device for elongated plastic strips according to claim 4, characterized in that: The traction mechanism further includes a third drive assembly and a fourth drive assembly; the third drive assembly is used to drive the first traction roller to rotate in a first direction; the fourth drive assembly is used to drive the second traction roller to rotate in a second direction; the first direction and the second direction are opposite.

6. The recycling and shearing device for elongated plastic strips according to claim 1, characterized in that: The shearing mechanism includes a shearing seat and a shearing blade; the shearing blade is vertically and flexibly positioned above the shearing seat.

7. The recycling and shearing device for elongated plastic strips according to claim 6, characterized in that: The shearing mechanism further includes a fifth drive component, which is used to drive the shearing blade to move up and down.

8. The recycling and shearing device for elongated plastic strips according to claim 7, characterized in that: The shearing mechanism further includes a shearing support; the shearing support is U-shaped, and a vertical guide rod is provided inside the shearing support; the shearing seat is fixedly mounted on the guide rod, and the shearing blade is vertically mounted on the vertical guide rod.

9. The recycling and shearing device for elongated plastic strips according to claim 8, characterized in that: A fixed seat is fixedly installed on the guide rod; the shearing seat is fixedly installed above the fixed seat; a slider seat is vertically slidable on the guide rod; and the shearing blade is fixedly installed below the slider seat.

10. The recycling and shearing device for elongated plastic strips according to claim 9, characterized in that: The fifth drive assembly includes a motor, a first turntable, and a first connecting rod. The motor is fixedly mounted on one side of the shear support, and its output end is horizontally positioned. The first turntable is fixedly sleeved on the output end of the motor. One end of the first connecting rod is hinged to the first turntable, and the other end of the first connecting rod is hinged to the slider seat. When the motor is started, it drives the first turntable to rotate. During the rotation, the first turntable drives the first connecting rod to move up and down, thereby causing the slider seat to slide up and down under the restriction of the guide rod, thus driving the shear blade to move up and down.

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