Plastic film slitting device convenient to position

Abstract

The utility model belongs to the technical field of plastic film slitting, and particularly relates to a plastic film slitting device convenient to position, which comprises a base, a positioning box is fixedly mounted in the center of the upper part of the base, a plurality of connecting rods are arranged in the positioning box in a crossed manner in the vertical direction, and adjacent positions of the connecting rods are rotationally connected through shafts; two sliding holes are sequentially formed in a box body on one side of the positioning box from top to bottom, moving plates are slidably installed on the two sides in the sliding hole in the upper portion, a plurality of sliding blocks are slidably installed in the sliding hole in the lower portion in an array mode, one end of each sliding block is fixedly connected with a shaft, a positioning seat is fixedly installed at the other end of each sliding block, and a groove is formed in one side of each positioning seat. A mounting hole is formed in the bottom of the base, a tool apron is slidably mounted in the mounting hole, and an annular blade is rotatably mounted in the lower end of the tool apron; and through the adjustable positioning seat and tool apron structure, precise positioning and flexible adjustment of the slitting blade are achieved, and the slitting requirements of films with different widths are met.

Description

Technical Field

[0001] This utility model relates to the field of plastic film slitting technology, specifically a plastic film slitting device that is easy to position. Background Technology

[0002] Plastic film refers to films made of polyvinyl chloride, polyethylene, polypropylene, and other resins, mainly used for packaging and coating. Different types of plastic films have different properties, such as toughness, moisture resistance, heat-sealing performance, transparency, gloss, heat resistance, oil resistance, and chemical stability.

[0003] The plastic film slitting device mainly consists of an unwinding mechanism, a slitting mechanism, a winding mechanism, and functional rollers. The raw material is released through the unwinding mechanism, and constant tension control ensures that the film does not deform. The slitting mechanism uses a circular blade to cut the film, and the winding mechanism uses a double air shaft to wind up the slitting film.

[0004] Existing plastic film slitting devices often suffer from problems such as low tool positioning accuracy, non-adjustable film tension, and fixed winding and unwinding roller spacing during the slitting process, resulting in large slitting width errors, film wrinkles or breaks, and low production efficiency, making it difficult to meet the flexible production needs of films of different specifications. Therefore, a plastic film slitting device that is easy to position is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and address the problems of low cutting accuracy, unadjustable film tension, and fixed winding and unwinding roller spacing in existing plastic film slitting devices mentioned in the background art, which often result in large cutting width errors, film wrinkles or breaks, low production efficiency, and difficulty in adapting to the flexible production needs of films of different specifications, this utility model proposes a plastic film slitting device that is easy to position.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A plastic film slitting device for easy positioning, comprising a base, with sliding holes on both sides of the upper part of the base, and sliding plates slidably installed in each sliding hole. Pressure rollers are provided between both ends of the sliding plates, and both ends of the pressure rollers are rotatably installed in the sliding plates via bearings. Sliding rods are fixedly installed on the upper parts of both ends of the sliding plates, with the upper ends of the sliding rods penetrating the base and sliding within it. Springs are provided on the upper parts of both ends of the sliding plates, fitted onto the sliding rods. Rotating rollers are rotatably installed in the base directly below each pressure roller. A positioning box is fixedly installed in the center of the upper part of the base. Multiple connecting rods are arranged vertically and cross each other inside the positioning box, with adjacent positions of the connecting rods rotatably connected by shafts. Two sliding plates are sequentially opened from top to bottom on one side of the positioning box. The positioning box has a sliding hole, with movable plates slidably installed on both sides of the upper sliding hole, and multiple sliders arranged in an array and slidably installed in the lower sliding hole. Each movable plate has a limit hole at one end, and the upper shaft of the connecting rod is slidably installed in the limit hole. A first cylinder is fixedly installed in the upper part of both ends of the positioning box, and the piston rod of the first cylinder is fixedly connected to the movable plate. One end of the slider is fixedly connected to the shaft, and the other end is fixedly installed with a positioning seat. A groove is opened on one side of the positioning seat, and an installation hole is opened at its bottom. A knife holder is slidably installed in the installation hole. A second cylinder is fixedly installed in the top of the groove of the positioning seat, and the piston rod of the second cylinder is fixedly connected to the top of the knife holder. A ring blade is rotatably installed in the lower end of the knife holder. Through the cross-connected connecting rod, adjustable slider and limit hole in the positioning box, the slitting tool can be quickly positioned and flexibly adjusted.

[0007] Preferably, a double-ended lead screw and a limiting rod are arranged parallel to each other on the upper part of both ends of the base. Both ends of the double-ended lead screw are rotatably mounted on the upper part of the base via bearings. The limiting rod is fixedly mounted on the upper part of the base. Support plates are slidably arranged on both sides of both ends of the base. Through holes are opened on both sides of the lower end of the support plates, and a threaded groove is opened in one of the through holes. The lower sides of the support plates are slidably mounted on the double-ended lead screw and the limiting rod, respectively. A first motor is fixedly mounted on the same side of both ends of the base. The rotating shaft of the first motor is fixedly connected to one end of the double-ended lead screw. An unwinding roller is rotatably mounted between the two support plates on the upper part of one end of the base. By setting the double-ended lead screw and the limiting rod on the upper part of both ends of the base, and cooperating with the first motor to drive the double-ended lead screw to rotate, the support plate can slide on the double-ended lead screw and the limiting rod, thereby realizing the precise adjustment of the distance between the unwinding roller and the winding roller.

[0008] Preferably, two take-up rollers are arranged parallel to each other in the vertical direction between the two support plates at the upper part of the other end of the base. One end of each take-up roller is rotatably installed in one support plate on the upper part of the base and a drive wheel is fixedly installed through the support plate. The other end of each take-up roller is slidably installed in the other support plate on the upper part of the base. The drive wheels rotate in cooperation with each other through a drive belt. A protective shell is sleeved on the outside of each drive wheel. The protective shell is fixedly installed on the outside of the support plate. A third motor is fixedly installed on the upper outer side of the protective shell. The rotating shaft of the third motor is fixedly connected to one end of the take-up roller. The third motor drives one of the take-up rollers to rotate, and the synchronous rotation of the two take-up rollers is achieved through the drive wheel and the drive belt, providing power for the winding process.

[0009] Preferably, a guide roller is fixedly installed inside one end of the base near the unwinding roller, and a bidirectional cylinder is fixedly installed on both sides of the other end. Two through holes are opened on both sides of the base. Two tension rollers are arranged in parallel inside one end of the base. Both ends of the tension roller are slidably installed in the through holes and are fixedly connected to the piston rod of the bidirectional cylinder through the base. The tension roller can slide in the through holes through the bidirectional cylinder piston rod, thereby realizing flexible adjustment of the film tension.

[0010] Preferably, a second motor is fixedly installed on one side of the base. The rotating shaft of the second motor is fixedly connected to one end of the rotating roller. The other end of each rotating roller passes through the base and is fixedly installed with a rotating wheel. The rotating wheels rotate in cooperation with each other through a rotating belt. The rotating roller is driven to rotate by the second motor, and the rotating wheels and rotating belts realize the synchronous rotation of multiple rotating rollers, ensuring the stability and consistency of the device operation and reducing the failure rate caused by inconsistent power transmission.

[0011] Preferably, the first cylinder, the second cylinder, the bidirectional cylinder, the first motor, the second motor, and the third motor are all linearly connected to the control box via power lines, and the control box is used to control their start and stop.

[0012] The advantages of this utility model are:

[0013] 1. This utility model, during the plastic film slitting process, activates the control box power supply. The first motor drives the double-headed lead screw to rotate, causing the two side support plates to synchronously expand outward or contract inward along the limit rod, allowing the unwinding roller to adapt to film rolls of different widths. The film is introduced through the guide roller. The second motor drives two rotating rollers to rotate synchronously via a rotating wheel and rotating belt, forming a clamping and conveying channel with the pressure roller adjusted by spring pressure, ensuring the film is smoothly transferred to the slitting station. When the first cylinder pushes the moving plate to move along the sliding hole, it causes the connecting rod assembly to move vertically, synchronously adjusting the spacing of multiple positioning seats. The cutter holder is connected to the positioning seat through the mounting hole. The second cylinder drives the cutter holder to move on the positioning seat. The vertical lifting mechanism within the groove drives the annular blade to adjust the slitting depth. This structural design for slitting plastic film enables precise adjustment of the distance between the unwinding and take-up rollers. It solves the problems often encountered in existing plastic film slitting devices during the slitting process, such as low blade positioning accuracy, unadjustable film tension, and fixed unwinding / take-up roller spacing. These problems lead to large slitting width errors, film wrinkles or breaks, low production efficiency, and difficulty in adapting to the flexible production needs of films of different specifications. This improves the accuracy of slitting width, reduces slitting width errors, and minimizes wrinkles or breaks caused by film tension issues, thereby increasing the product qualification rate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the unwinding end structure of a film slitting device;

[0016] Figure 2 This is a schematic diagram of the winding end structure of a film slitting device;

[0017] Figure 3 This is a schematic diagram of the slitting mechanism.

[0018] Figure 4 Schematic diagram of the positioning and adjustment mechanism;

[0019] Figure 5 This is a schematic diagram of the winding roller drive mechanism.

[0020] In the diagram: 1. Base; 2. Double-ended lead screw; 3. Limiting rod; 4. Support plate; 5. Unwinding roller; 6. First motor; 7. Guide roller; 8. Rotating roller; 9. Slide plate; 10. Pressure roller; 11. Slide rod; 12. Spring; 13. Second motor; 14. Rotating wheel; 15. Rotating belt; 16. Positioning box; 17. Connecting rod; 18. First cylinder; 19. Moving plate; 20. Slider; 21. Positioning seat; 22. Second cylinder; 23. Blade holder; 24. Annular blade; 25. Bidirectional cylinder; 26. Tensioning roller; 27. Rewinding roller; 28. Transmission wheel; 29. ​​Transmission belt; 30. Protective shell; 31. Third motor. Detailed Implementation

[0021] 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 scope of protection of the present utility model.

[0022] Please see Figure 1-5As shown, a plastic film slitting device for easy positioning includes a base 1. Sliding holes are provided on both sides of the upper part of the base 1, and sliding plates 9 are slidably installed within each sliding hole. Pressure rollers 10 are provided between both ends of each sliding plate 9, and both ends of the pressure rollers 10 are rotatably mounted within the sliding plates 9 via bearings. Sliding rods 11 are fixedly installed on the upper parts of both ends of each sliding plate 9, with the upper ends of the sliding rods 11 penetrating through the base 1 and sliding within it. Springs 12 are provided on the upper parts of both ends of each sliding plate 9, fitted onto the sliding rods 11. Rotating rollers 8 are rotatably installed within the base 1 directly below each pressure roller 10. A positioning box 16 is fixedly installed in the center of the upper part of the base 1. Vertical cross-sections are provided within the positioning box 16. Multiple connecting rods 17 are provided, and adjacent positions of the connecting rods 17 are rotatably connected by shafts. Two sliding holes are sequentially opened from top to bottom on one side of the positioning box 16. Movable plates 19 are slidably installed on both sides of the upper sliding hole, and multiple sliders 20 are arranged in an array and slidably installed in the lower sliding hole. Limit holes are opened at opposite ends of each movable plate 19. The upper shaft of each connecting rod 17 is slidably positioned within the limit holes. First cylinders 18 are fixedly installed on the upper part of both ends of the positioning box 16. The piston rods of the first cylinders 18 are fixedly connected to the movable plates 19. One end of each slider 20 is fixedly connected to a shaft, and the other end is fixedly installed with a positioning seat 21. A slot is provided on one side of the positioning seat 21, and a mounting hole is provided at its bottom. A knife holder 23 is slidably installed in the mounting hole. A second cylinder 22 is fixedly installed at the top of the slot of the positioning seat 21. The piston rod of the second cylinder 22 is fixedly connected to the top of the knife holder 23. A ring blade 24 is rotatably installed in the lower end of the knife holder 23. During operation, in the process of plastic film cutting, the power of the control box is turned on, and the first motor 6 drives the double-headed lead screw 2 to rotate, which drives the two side support plates 4 to expand outward or contract inward synchronously along the limit rod 3, so that the unwinding roller 5 can adapt to film rolls of different widths. The film is introduced through the guide roller 7. The second motor 13 drives the two rotating rollers 8 to rotate synchronously through the rotating wheel 14 and the rotating belt 15, in conjunction with the spring 1. The pressure roller 10 with pressure adjustment forms a clamping and conveying channel to ensure that the film is smoothly transferred to the slitting station. When the first cylinder 18 pushes the moving plate 19 to move along the sliding hole, it drives the connecting rod group to move vertically. The slider 20 slides in the limiting hole, so that the spacing of multiple positioning seats 21 is adjusted synchronously. The second cylinder 22 drives the knife holder 23 to rise and fall vertically in the groove of the positioning seat 21, and drives the ring blade 24 to realize the adjustment of the slitting depth to adapt to the needs of films of different thicknesses. The slitting plastic film is fixed on the winding roller 27 by the tension roller 26. The third motor 31 is started to drive the two winding rollers 27 to rotate synchronously through the transmission wheel 28 and the transmission belt 29 to start winding the slitting plastic film.

[0023] The base 1 has a double-ended lead screw 2 and a limiting rod 3 arranged parallel to each other on the upper part of both ends. The two ends of the double-ended lead screw 2 are rotatably mounted on the upper part of the base 1 through bearings. The limiting rod 3 is fixedly mounted on the upper part of the base 1. Support plates 4 are slidably arranged on both sides of both ends of the base 1. The lower ends of the support plates 4 have through holes on both sides, and one of the through holes has a threaded groove. The lower ends of the support plates 4 are slidably mounted on the double-ended lead screw 2 and the limiting rod 3 respectively. A first motor 6 is fixedly mounted on the same side of both ends of the base 1. The rotating shaft of the first motor 6 is fixedly connected to one end of the double-ended lead screw 2. A unwinding roller 5 is rotatably mounted between the two support plates 4 on the upper part of one end of the base 1. During operation, when the plastic film is being cut, the power of the control box is turned on, and the first motor 6 drives the double-ended lead screw 2 to rotate. Through the threaded transmission, the two support plates 4 are synchronously expanded outward or contracted along the limiting rod 3, so that the unwinding roller 5 can accurately adapt to film rolls of different widths.

[0024] Two take-up rollers 27 are arranged parallel to each other in a vertical direction between the two support plates 4 on the upper part of the other end of the base 1. One end of each take-up roller 27 is rotatably mounted inside one support plate 4 on the upper part of the base 1 and a drive wheel 28 is fixedly mounted through the support plate 4. The other end of each take-up roller 27 is slidably mounted inside the other support plate 4 on the upper part of the base 1. The drive wheels 28 rotate in cooperation with each other through a drive belt 29. A protective shell 30 is sleeved on the outside of the drive wheels 28. The protective shell 30 is fixedly mounted on the outside of the support plate 4. A third motor 31 is fixedly mounted on the upper outer side of the protective shell 30. The rotating shaft is fixedly connected to one end of the take-up roller 27. During operation, in the process of cutting the plastic film, the control box controls the third motor 31 to start. The rotating shaft of the third motor 31 drives one of the take-up rollers 27 to rotate. The drive wheel 28 at one end of the take-up roller 27 drives the drive wheel 28 of the other take-up roller 27 to rotate synchronously through the drive belt 29. Thus, the two take-up rollers 27 rotate synchronously. In this way, the cut plastic film can be neatly rolled up on the take-up roller 27. The protective shell 30 can prevent the drive wheel 28 and the drive belt 29 from being disturbed by the outside world, ensuring the stability of the winding process.

[0025] A guide roller 7 is fixedly installed inside one end of the base 1 near the unwinding roller 5, and a bidirectional cylinder 25 is fixedly installed on both sides of the other end. Two through holes are opened on both sides of the base 1. Two tension rollers 26 are arranged parallel inside one end of the base 1. Both ends of the tension rollers 26 are slidably installed in the through holes and are fixedly connected to the piston rod of the bidirectional cylinder 25 through the base 1. During operation, during the plastic film cutting process, the control box controls the bidirectional cylinder 25 to start according to the tension of the film. The piston rod of the bidirectional cylinder 25 drives the tension rollers 26 to slide in the through holes, thereby adjusting the position of the tension rollers 26. When the film is too loose, the piston rod of the bidirectional cylinder 25 extends, causing the tension rollers 26 to move away from the take-up roller 27 and tighten the film. When the film is too tight, the piston rod of the bidirectional cylinder 25 retracts, causing the tension rollers 26 to move closer to the take-up roller 27 and loosen the film.

[0026] A second motor 13 is fixedly installed on one side of the base 1. The rotating shaft of the second motor 13 is fixedly connected to one end of the rotating roller 8. The other end of the rotating roller 8 passes through the base 1 and is fixedly installed with a rotating wheel 14. The rotating wheels 14 rotate in coordination with each other through a rotating belt 15. During operation, when the second motor 13 starts during the plastic film cutting process, its rotating shaft drives the rotating roller 8 to rotate. The rotating wheel 14 at the other end of the rotating roller 8 is coordinated with the rotating belt 15, so that the two rotating rollers 8 rotate synchronously. At the same time, under the action of the spring 12, the slide plate 9 slides along the sliding hole, driving the pressure roller 10 to press down on the rotating roller 8 to form a clamping and conveying channel.

[0027] The first cylinder 18, the second cylinder 22, the bidirectional cylinder 25, the first motor 6, the second motor 13, and the third motor 31 are all linearly connected to the control box via power lines, and the control box is used to control their start and stop. During operation, in the process of plastic film slitting, through the coordinated control of each component by the control box, the plastic film slitting device can efficiently and accurately complete the slitting and winding tasks of plastic film, and can adapt to the production needs of plastic films of different specifications.

[0028] Working principle: During the plastic film slitting process, the control box power is activated, and the first motor 6 drives the double-headed lead screw 2 to rotate, causing the two side support plates 4 to expand outward or contract inward synchronously along the limit rod 3, so that the unwinding roller 5 can adapt to film rolls of different widths. The film is introduced through the guide roller 7, and the second motor 13 drives the two rotating rollers 8 to rotate synchronously through the rotating wheel 14 and rotating belt 15. Together with the pressure roller 10 with the pressure adjustment of the spring 12, a clamping and conveying channel is formed to ensure that the film is smoothly transferred to the slitting station. The first cylinder 18 pushes the moving plate 19 along the sliding hole. During displacement, the linkage group is driven to produce vertical displacement, and the slider 20 slides in the limiting hole, so that the spacing of multiple positioning seats 21 is adjusted synchronously. The second cylinder 22 drives the knife holder 23 to rise and fall vertically in the groove of the positioning seat 21, driving the ring blade 24 to realize the slitting depth adjustment to adapt to the needs of films of different thicknesses. The slitting plastic film is fixed on the winding roller 27 by the tension roller 26. The third motor 31 is started to drive the two winding rollers 27 to rotate synchronously through the transmission wheel 28 and the transmission belt 29, and the slitting plastic film is started to be wound up.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A plastic film slitting device for easy positioning, characterized in that: The system includes a base (1), on both sides of the upper part of the base (1) having sliding holes, in which slide plates (9) are slidably installed. Pressure rollers (10) are provided between both ends of the slide plates (9), and both ends of the pressure rollers (10) are rotatably installed in the slide plates (9) via bearings. Slide rods (11) are fixedly installed on the upper parts of both ends of the slide plates (9), with the upper ends of the slide rods (11) penetrating the base (1) and sliding within it. Springs (12) are provided on the upper parts of both ends of the slide plates (9) and fitted onto the slide rods (11). Rotating rollers (8) are rotatably installed in the base (1) directly below the pressure rollers (10). A positioning box (16) is fixedly installed in the center of the upper part of the base (1). Multiple connecting rods (17) are arranged vertically and cross each other in the positioning box (16). Adjacent positions of the connecting rods (17) are rotatably connected via shafts. Two... The upper sliding hole has a sliding plate (19) slidably installed on both sides. The lower sliding hole has an array of sliding sliders (20) slidably installed. Each sliding plate (19) has a limit hole at one end. The upper shaft of the connecting rod (17) is slidably installed in the limit hole. The upper part of both ends of the positioning box (16) is fixedly installed with a first cylinder (18). The piston rod of the first cylinder (18) is fixedly connected to the sliding plate (19). One end of the slider (20) is fixedly connected to the shaft, and the other end is fixedly installed with a positioning seat (21). The positioning seat (21) has a groove on one side and an installation hole at its bottom. A knife holder (23) is slidably installed in the installation hole. A second cylinder (22) is fixedly installed at the top of the groove of the positioning seat (21). The piston rod of the second cylinder (22) is fixedly connected to the top of the knife holder (23). A ring blade (24) is rotatably installed in the lower end of the knife holder (23).

2. The plastic film slitting device for easy positioning according to claim 1, characterized in that: The base (1) has a double-ended lead screw (2) and a limiting rod (3) arranged in parallel on the upper part of both ends. The double-ended lead screw (2) is rotatably mounted on the upper part of the base (1) through bearings. The limiting rod (3) is fixedly mounted on the upper part of the base (1). Support plates (4) are slidably arranged on both sides of both ends of the base (1). The lower ends of the support plates (4) are provided with through holes on both sides, and one of the through holes is provided with a threaded groove. The lower ends of the support plates (4) are slidably mounted on the double-ended lead screw (2) and the limiting rod (3) respectively. The first motor (6) is fixedly mounted on the same side of both ends of the base (1). The rotating shaft of the first motor (6) is fixedly connected to one end of the double-ended lead screw (2). A unwinding roller (5) is rotatably mounted between the two support plates (4) on the upper part of one end of the base (1).

3. The plastic film slitting device for easy positioning according to claim 2, characterized in that: Two take-up rollers (27) are arranged in parallel vertical direction between the two support plates (4) on the upper part of the other end of the base (1). One end of each take-up roller (27) is rotatably installed in the support plate (4) on the upper part of the base (1) and a transmission wheel (28) is fixedly installed through the support plate (4). The other end is slidably installed in the support plate (4) on the other side of the upper part of the base (1). The transmission wheels (28) rotate in cooperation with each other through a transmission belt (29). A protective shell (30) is sleeved on the outside of the transmission wheel (28). The protective shell (30) is fixedly installed on the outside of the support plate (4). A third motor (31) is fixedly installed on the outer side of the upper end of the protective shell (30). The rotating shaft of the third motor (31) is fixedly connected to one end of the take-up roller (27).

4. The plastic film slitting device for easy positioning according to claim 1, characterized in that: A guide roller (7) is fixedly installed inside one end of the base (1) near the unwinding roller (5), and a bidirectional cylinder (25) is fixedly installed on both sides of the other end. Two through holes are opened on both sides of the base (1). Two tension rollers (26) are arranged in parallel inside one end of the base (1). Both ends of the tension rollers (26) are slidably installed in the through holes and pass through the base (1) and are fixedly connected to the piston rod of the bidirectional cylinder (25).

5. A plastic film slitting device for easy positioning according to claim 1, characterized in that: A second motor (13) is fixedly installed on one side of the base (1). The rotating shaft of the second motor (13) is fixedly connected to one end of the rotating roller (8). The other end of the rotating roller (8) passes through the base (1) and is fixedly installed with a rotating wheel (14). The rotating wheels (14) rotate in cooperation with each other through a rotating belt (15).

6. The plastic film slitting device for easy positioning according to claim 1, characterized in that: The first cylinder (18), the second cylinder (22), the bidirectional cylinder (25), the first motor (6), the second motor (13) and the third motor (31) are all linearly connected to the control box via power lines, and the control box is used to control their start and stop.

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