Plastic film laser slitting device

Abstract

The invention discloses a plastic film laser slitting device, and relates to the technical field of laser cutting, the plastic film laser slitting device comprises a base, a synchronous air filtering part is arranged at the bottom of a mounting seat, and a spreading slitting part is arranged on a first movable sliding block. According to the spreading and slitting device, the spreading and slitting part is arranged, a first telescopic air cylinder is started through a controller, and the end, away from a rotating connecting shaft, of a balance weight swing plate swings towards a cutting groove; when the straight gear is separated from the positioning rack, the rotary connecting shaft continues to rotate relative to the rotary connecting shaft under the action of the elastic restoring force of the torsion spring, and the end, away from the rotary connecting shaft, of the balance weight swing plate presses the plastic film above the base, so that the top of the plastic film is pressed to be in a straightened state; at the moment, when the laser beam emitted by the laser cutting machine body cuts the plastic film above the cutting groove, the flatness of the cut position of the plastic film can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, in particular to a plastic film laser cutting device. Background Art

[0002] The production of polyethylene plastic film is that the polyethylene plastic particles are extruded and plasticized, and then formed into a film in a special mold, and then rolled up after shaping, and then the rolled film is cut into the required length by a slitting machine, and then the cut film is re-rolled and finally packaged for use. In the processing of polyethylene plastic film, the complete polyethylene plastic film needs to be cut into multiple sections of plastic film.

[0003] The cutting process of the semi-finished film is carried out by mechanical punching. There are many problems with mechanical punching, such as the easy wear of the punching dies, the inconvenience of taking and placing the products after punching, and the burrs or tears on the cutting edges, which lead to low production efficiency and product yield. In this case, the film needs to be cut by laser cutting equipment. When the film is cut, the film is in a relaxed state. At this time, when the laser cutter is used to cut the film, the cutting line on the film will be tilted, which will affect the flatness of the equipment at the film cutting point, and will also affect the size of the cut film. Summary of the invention

[0004] The purpose of the present invention is to provide a plastic film laser slitting device in order to solve the problem that the cutting line on the film is easily inclined when the film is slitting.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a plastic film laser cutting device, comprising a base, a first guide rod is installed on the top of the base, a first movable slider is movably sleeved on the first guide rod, a side panel is installed on the top of the first movable slider, a second guide rod located above the base is arranged on one side of the side panel, a second movable slider is movably connected to the second guide rod, a mounting seat is arranged on one side of the second movable slider, a laser cutting machine body is installed on the top of the mounting seat, a second telescopic cylinder is arranged on the side of the side panel away from the second guide rod, a controller is arranged on the side of the side panel away from the second telescopic cylinder, an output end of the second telescopic cylinder is connected to the mounting seat, a synchronous air filter is arranged on the bottom of the mounting seat, and a spreading and cutting piece is arranged on the first movable slider.

[0006] As a further solution of the present invention: the number of the first movable sliders is set to two, and the two first movable sliders are symmetrically arranged along the vertical central axis of the base, the two first movable sliders are both provided with side panels, and the controller and the second telescopic cylinder are installed on the two side panels.

[0007] As a further scheme of the present invention: the spreading and cutting piece includes a cutting groove opened on the top of the base, the top of the base is provided with clamping grooves located on both sides of the cutting groove, the cutting groove is located below the mounting seat, a pressing connecting plate located above the clamping groove is provided on one side of the first movable slider, a reset spring connected to the top of the base and located on the outside of the first guide rod is provided at the bottom of the first movable slider, U-shaped plates are installed on both sides of the base, and a positioning rack is provided on the U-shaped plate, a rotating coupling located on the side of the first guide rod close to the cutting groove is rotatably connected to the first movable slider, spur gears meshing with the positioning rack are installed on both sides of the rotating coupling, a second connecting plate is installed on the side of the first movable slider away from the first guide rod, a first telescopic cylinder is installed on the top of the second connecting plate, the output end of the first telescopic cylinder is connected to the first connecting plate connected to the U-shaped plate, a counterweight swing plate is provided on the rotating coupling, and a torsion spring is clamped at the connection between the rotating coupling and the first movable slider through the clamping groove.

[0008] As a further solution of the present invention: the distance from the rotating connecting shaft to the cutting groove is smaller than the distance from the pressing connecting plate to the center of the cutting groove, and the bottom of the pressing connecting plate fits with the slot.

[0009] As a further solution of the present invention: the width of the counterweight swing plate is smaller than the distance between the center of the rotating coupling and the transverse center axis of the cutting groove.

[0010] As a further solution of the present invention: the synchronous air filter element includes a second mounting bracket installed on both sides of the second movable slider, the second mounting bracket is equipped with a front ventilation pressure plate at one end away from the second movable slider, and a first mounting bracket is arranged on both sides of the side panels close to the controller, and a rear ventilation pressure plate is installed at one end of the first mounting bracket away from the side panels, a corrugated expansion pipe connected to the rear ventilation pressure plate is arranged on one side of the front ventilation pressure plate, a second one-way valve is arranged on the side of the front ventilation pressure plate away from the corrugated expansion pipe, an air collecting pipe sleeve is arranged at the bottom of the mounting seat, an annular bin is arranged on the outer wall of the air collecting pipe sleeve, a ventilation pipe connected to the second one-way valve is arranged on the outer wall of the annular bin, an activated carbon placement bin is arranged on the side of the rear ventilation pressure plate away from the corrugated expansion pipe, and a first one-way valve is arranged on the side of the activated carbon placement bin away from the rear ventilation pressure plate.

[0011] As a further solution of the present invention: the center of the gas collecting sleeve is coaxial with the laser beam emitted by the laser cutting machine body, and the inner wall diameter of the gas collecting sleeve is larger than the diameter of the laser beam emitted by the laser cutting machine body.

[0012] As a further solution of the present invention: the exhaust end of the second one-way valve is connected to the front ventilation pressure plate, and the air inlet end of the first one-way valve is connected to the activated carbon storage bin.

[0013] As a further solution of the present invention: the activated carbon placement bin and the rear end ventilation pressure plate, the first one-way valve and the activated carbon placement bin are all detachably connected via threads.

[0014] As a further solution of the present invention: the centers of the front ventilation pressure plate and the rear ventilation pressure plate are coaxial, and the front ventilation pressure plate and the rear ventilation pressure plate are at the same horizontal height.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a synchronous air filter, when the second telescopic cylinder contracts, the front ventilation pressure plate pulls one end of the bellows telescopic tube to extend the bellows telescopic tube, so that the inside of the bellows telescopic tube is in a negative pressure state. At this time, the smoke generated by the laser beam cutting the plastic film will enter the inside of the bellows telescopic tube through the gas collecting pipe sleeve, the annular bin, the ventilation pipe, and the second one-way valve. When the second telescopic cylinder extends, the bellows telescopic tube will be pressed by the front ventilation pressure plate and contract, so that the smoke inside the bellows telescopic tube is discharged through the activated carbon placement bin and the first one-way valve. When the smoke passes through the activated carbon placement bin, the odor generated by the smoke will be absorbed by the activated carbon inside the activated carbon placement bin, so that the smoke generated during cutting can be purified to prevent the smoke from affecting the working environment; 2. By setting a spreading and cutting piece, the first telescopic cylinder is started through the controller. When the first telescopic cylinder contracts, it will drive the first movable slider to move toward the base. At this time, the reset spring contracts, and the spur gear rotates along the positioning rack, so that the end of the counterweight swing plate away from the rotating coupling swings toward the cutting groove. When the pressing connecting plate is inserted into the slot, the spur gear is separated from the positioning rack. At this time, the plastic film above the base is limited. When the spur gear is separated from the positioning rack, the rotating coupling will continue to rotate relative to the rotating coupling under the action of the elastic restoring force of the torsion spring. In this way, the end of the counterweight swing plate away from the rotating coupling can press the plastic film above the base, so that the top of the plastic film is under pressure and is in a stretched state. At this time, when the laser beam emitted by the laser cutting machine body cuts the plastic film above the cutting groove, the flatness of the cutting part of the plastic film can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a side view of the present invention; Figure 3 It is a schematic diagram of the connection between the base and the first movable slider of the present invention; Figure 4 It is a schematic diagram of the connection between the first movable slider and the rotating shaft of the present invention; Figure 5It is a schematic diagram of the connection between the second guide rod and the second movable sliding block of the present invention; Figure 6 It is a schematic diagram of the connection between the gas collecting pipe sleeve and the mounting seat of the present invention; Figure 7 It is a schematic diagram of the connection between the gas collecting pipe sleeve and the rear end ventilation pressure plate of the present invention; Figure 8 It is a schematic diagram of the internal structure of the gas collecting pipe sleeve of the present invention.

[0017] In the figure: 1. base; 2. first guide rod; 3. cutting groove; 4. U-shaped plate; 5. first connecting plate; 6. positioning rack; 7. spur gear; 8. first telescopic cylinder; 9. second telescopic cylinder; 10. first movable slider; 11. side plate; 12. second guide rod; 13. gas collecting pipe sleeve; 14. laser cutting machine body; 15. second movable slider; 16. controller; 17. corrugated telescopic pipe; 18. mounting seat; 19. slot; 20. front ventilation pressure plate; 21. counterweight swing plate; 22. rear ventilation pressure plate; 23. activated carbon placement bin; 24. first one-way valve; 25. first mounting bracket; 26. pressing connecting plate; 27. second connecting plate; 28. reset spring; 29. ​​rotating coupling; 30. torsion spring; 31. ventilation pipe; 32. second one-way valve; 33. annular bin; 34. second mounting bracket. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0020] See also Figures 1 to 8 In an embodiment of the present invention, a plastic film laser cutting device includes a base 1, a first guide rod 2 is installed on the top of the base 1, a first movable slider 10 is movably sleeved on the first guide rod 2, a side plate 11 is installed on the top of the first movable slider 10, a second guide rod 12 located above the base 1 is arranged on one side of the side plate 11, a second movable slider 15 is movably connected to the second guide rod 12, a mounting seat 18 is arranged on one side of the second movable slider 15, a laser cutting machine body 14 is installed on the top of the mounting seat 18, a second telescopic cylinder 9 is arranged on the side of the side plate 11 away from the second guide rod 12, a controller 16 is arranged on the side of the side plate 11 away from the second telescopic cylinder 9, an output end of the second telescopic cylinder 9 is connected to the mounting seat 18, a synchronous air filter is arranged at the bottom of the mounting seat 18, and a spreading and cutting piece is arranged on the first movable slider 10.

[0021] In this embodiment, when the plastic film is cut, one end of the film is first passed through the top of the base 1. After the plastic film is pulled to a specified length, the spreading and cutting piece is started by the controller 16. The plastic film below the mounting seat 18 is in a stretched state by the spreading and cutting piece. Then, the second telescopic cylinder 9 and the laser cutting machine body 14 are started by the controller 16. The second movable slider 15 drives the laser cutting machine body 14 and the mounting seat 18 to move by contracting and extending the second telescopic cylinder 9. In this process, the laser cutting machine body 14 is operated to cause the laser beam emitted by the laser cutting machine body 14 to cut the plastic film below the mounting seat 18. During the movement, the laser cutting machine body 14 absorbs and filters the odor generated by the laser cutting of the plastic film through the synchronous air filter.

[0022] Please refer to Figure 2 , Figure 3 , Figure 5 There are two first movable sliders 10 , and the two first movable sliders 10 are symmetrically arranged along the vertical center axis of the base 1 . Side panels 11 are arranged on the two first movable sliders 10 , and the controller 16 and the second telescopic cylinder 9 are installed on the two side panels 11 .

[0023] In this embodiment, the stability of the side plate 11 moving up and down is improved by providing this structure.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The spreading and cutting piece includes a cutting groove 3 opened on the top of the base 1, and the top of the base 1 is provided with a clamping groove 19 located on both sides of the cutting groove 3, and the cutting groove 3 is located below the mounting seat 18. A pressing connecting plate 26 located above the clamping groove 19 is provided on one side of the first movable slider 10, and a return spring 28 connected to the top of the base 1 and located outside the first guide rod 2 is provided at the bottom of the first movable slider 10. U-shaped plates 4 are installed on both sides of the base 1, and positioning racks 6 are provided on the U-shaped plates 4. The first movable slider 10 is rotatably connected with a positioning rack located on the first A rotating coupling 29 is provided on the side of the guide rod 2 close to the cutting groove 3, and spur gears 7 meshing with the positioning rack 6 are installed on both sides of the rotating coupling 29. A second connecting plate 27 is installed on the side of the first movable slider 10 away from the first guide rod 2. A first telescopic cylinder 8 is installed on the top of the second connecting plate 27. The output end of the first telescopic cylinder 8 is connected to the first connecting plate 5 connected to the U-shaped plate 4. A counterweight swing plate 21 is provided on the rotating coupling 29, and a torsion spring 30 is clamped at the connection between the rotating coupling 29 and the first movable slider 10 through a clamping slot.

[0025] In this embodiment, the first telescopic cylinder 8 is started by the controller 16. When the first telescopic cylinder 8 is contracted, it will drive the first movable slider 10 to move toward the base 1. At this time, the reset spring 28 is contracted, and the spur gear 7 rotates along the positioning rack 6, so that the end of the counterweight swing plate 21 away from the rotating coupling 29 swings toward the cutting groove 3. When the pressing connecting plate 26 is inserted into the slot 19, the spur gear 7 is separated from the positioning rack 6. At this time, the plastic film above the base 1 is limited. When the spur gear 7 is separated from the positioning rack 6, the rotating coupling 29 will continue to rotate relative to the rotating coupling 29 under the action of the elastic restoring force of the torsion spring 30. In this way, the end of the counterweight swing plate 21 away from the rotating coupling 29 can press the plastic film above the base 1, so that the top of the plastic film is subjected to pressure and is in a stretched state. At this time, when the laser beam emitted by the laser cutting machine body 14 cuts the plastic film above the cutting groove 3, the flatness of the cutting position of the plastic film can be ensured.

[0026] Please refer to Figure 4 The distance from the rotating connecting shaft 29 to the cutting groove 3 is smaller than the distance from the pressing connecting plate 26 to the center of the cutting groove 3 , and the bottom of the pressing connecting plate 26 fits with the card slot 19 .

[0027] In this embodiment, by setting this structure to press the connecting plates 26 to press the plastic film, the counterweight swing plate 21 straightens the film between the pressing connecting plates 26, thereby improving the accuracy of cutting.

[0028] Please refer to Figure 3 , Figure 4 The width of the counterweight swing plate 21 is smaller than the distance between the center of the rotating shaft 29 and the transverse center axis of the cutting groove 3.

[0029] In this embodiment, this structure is provided to prevent the laser beam emitted by the laser cutting machine body 14 from being blocked when the counterweight swing plate 21 is rotated to a horizontal state.

[0030] Please refer to Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8The synchronous air filter includes a second mounting frame 34 mounted on both sides of the second movable slider 15, a front end ventilation pressure plate 20 is mounted on the end of the second mounting frame 34 away from the second movable slider 15, a first mounting frame 25 is arranged on both sides of the side plate 11 close to the controller 16, a rear end ventilation pressure plate 22 is mounted on the end of the first mounting frame 25 away from the side plate 11, a corrugated telescopic pipe 17 connected to the rear end ventilation pressure plate 22 is arranged on one side of the front end ventilation pressure plate 20, a second one-way valve 32 is installed on the side of the front end ventilation pressure plate 20 away from the corrugated telescopic pipe 17, a gas collecting pipe sleeve 13 is arranged at the bottom of the mounting seat 18, an annular bin 33 is arranged on the outer wall of the gas collecting pipe sleeve 13, a ventilation pipe 31 connected to the second one-way valve 32 is installed on the outer wall of the annular bin 33, an activated carbon placement bin 23 is installed on the side of the rear end ventilation pressure plate 22 away from the corrugated telescopic pipe 17, and a first one-way valve 24 is installed on the side of the activated carbon placement bin 23 away from the rear end ventilation pressure plate 22.

[0031] In this embodiment, when the second telescopic cylinder 9 contracts, it will drive the mounting seat 18 to move in a direction away from the controller 16. At this time, the laser cutting machine body 14 cuts the plastic film through the emitted laser beam. In this process, the second movable slider 15 drives the front ventilation pressure plate 20 to move through the second mounting bracket 34, so that the front ventilation pressure plate 20 pulls one end of the corrugated telescopic tube 17, so that the corrugated telescopic tube 17 is stretched, so that the inside of the corrugated telescopic tube 17 is in a negative pressure state. At this time, the smoke generated by the laser beam cutting the plastic film will pass through The smoke passes through the gas collecting pipe sleeve 13, the annular bin 33, the ventilation pipe 31 and the second one-way valve 32 and enters the inner side of the bellows telescopic tube 17. When the second telescopic cylinder 9 is extended, the bellows telescopic tube 17 will be pressed by the front ventilation pressure plate 20 and contract, so that the smoke inside the bellows telescopic tube 17 is discharged through the activated carbon placement bin 23 and the first one-way valve 24. When the smoke passes through the activated carbon placement bin 23, the odor generated by the smoke will be absorbed by the activated carbon inside the activated carbon placement bin 23, so that the smoke generated during cutting can be purified to prevent the smoke from affecting the working environment.

[0032] Please refer to Figure 6 , Figure 8 The center of the gas collecting pipe sleeve 13 is coaxial with the laser beam emitted by the laser cutting machine body 14 , and the inner wall diameter of the gas collecting pipe sleeve 13 is larger than the diameter of the laser beam emitted by the laser cutting machine body 14 .

[0033] In this embodiment, this structure is provided to prevent the gas collecting pipe sleeve 13 from blocking the laser beam emitted by the laser cutting machine body 14, and also improve the absorption effect of the smoke generated after cutting.

[0034] Please refer to Figure 7The exhaust end of the second one-way valve 32 is connected to the front ventilation pressure plate 20, and the air inlet end of the first one-way valve 24 is connected to the activated carbon placement bin 23.

[0035] In this embodiment, this structure is provided so that smoke can only pass through the second one-way valve 32 to enter the inner side of the bellows 17, and at the same time, the smoke inside the bellows 17 can only be discharged from the first one-way valve 24, thereby achieving one-way flow of smoke inside the bellows 17.

[0036] Please refer to Figure 7 The activated carbon storage bin 23 and the rear ventilation platen 22, and the first one-way valve 24 and the activated carbon storage bin 23 are all detachably connected via threads.

[0037] In this embodiment, this structure is provided to realize the replacement of the activated carbon storage bin 23, thereby enhancing the subsequent purification effect on the flue gas.

[0038] Please refer to Figure 6 , Figure 7 The front ventilation pressure plate 20 and the rear ventilation pressure plate 22 are coaxial in center, and the front ventilation pressure plate 20 and the rear ventilation pressure plate 22 are at the same horizontal height.

[0039] In this embodiment, by providing this structure, the bellows expansion tube 17 can only be extended in the horizontal direction, thereby preventing the bellows expansion tube 17 from tilting.

[0040] The working principle of the present invention is as follows: when the plastic film is cut, one end of the film is first passed through the top of the base 1, and the first telescopic cylinder 8 is started by the controller 16. When the first telescopic cylinder 8 is contracted, it will drive the first movable slider 10 to move toward the base 1. At this time, the return spring 28 is contracted, and the spur gear 7 rotates along the positioning rack 6, so that the end of the counterweight swing plate 21 away from the rotating shaft 29 is swung toward the cutting groove 3. When the pressing connecting plate 26 is inserted into the card slot 19, the spur gear 7 is separated from the positioning rack 6, and the bottom is located at this time. The plastic film above the seat 1 is limited, and when the spur gear 7 is separated from the positioning rack 6, the rotating coupling 29 will continue to rotate relative to the rotating coupling 29 under the elastic restoring force of the torsion spring 30, so that the end of the counterweight swing plate 21 away from the rotating coupling 29 can press the plastic film above the base 1, so that the top of the plastic film is under pressure and is in a straight state. At this time, when the laser beam emitted by the laser cutting machine body 14 cuts the plastic film above the cutting groove 3, the flatness of the cutting position of the plastic film can be guaranteed. When the second telescopic cylinder 9 is When it contracts, it will drive the mounting seat 18 to move in a direction away from the controller 16. At this time, the laser cutting machine body 14 cuts the plastic film through the emitted laser beam. In this process, the second movable slider 15 drives the front ventilation pressure plate 20 to move through the second mounting bracket 34, so that the front ventilation pressure plate 20 pulls one end of the corrugated telescopic tube 17 to stretch the corrugated telescopic tube 17. In this way, the inside of the corrugated telescopic tube 17 is in a negative pressure state. At this time, the smoke generated by the laser beam cutting the plastic film will pass through the collecting pipe sleeve 13, the ring The bellows 17 is provided with a shaped bin 33, a vent pipe 31 and a second one-way valve 32. When the second telescopic cylinder 9 is extended, the bellows 17 is pressed by the front ventilation plate 20 and contracts, so that the smoke inside the bellows 17 is discharged through the activated carbon placement bin 23 and the first one-way valve 24. When the smoke passes through the activated carbon placement bin 23, the activated carbon inside the activated carbon placement bin 23 absorbs the odor generated by the smoke. In this way, the smoke generated during cutting can be purified to prevent the smoke from affecting the working environment.

[0041] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic film laser cutting device, comprising a base (1), characterized in that: A first guide rod (2) is mounted on the top of the base (1), a first movable slider (10) is movably sleeved on the first guide rod (2), a side plate (11) is mounted on the top of the first movable slider (10), a second guide rod (12) located above the base (1) is arranged on one side of the side plate (11), a second movable slider (15) is movably connected to the second guide rod (12), a mounting seat (18) is arranged on one side of the second movable slider (15), a laser cutting machine body (14) is mounted on the top of the mounting seat (18), a second telescopic cylinder (9) is arranged on the side of the side plate (11) away from the second guide rod (12), a controller (16) is arranged on the side of the side plate (11) away from the second telescopic cylinder (9), an output end of the second telescopic cylinder (9) is connected to the mounting seat (18), a synchronous air filter is arranged at the bottom of the mounting seat (18), and a spreading and cutting member is arranged on the first movable slider (10).

2. A plastic film laser cutting device according to claim 1, characterized in that: The number of the first movable slide blocks (10) is two, and the two first movable slide blocks (10) are symmetrically arranged along the vertical center axis of the base (1), and the two first movable slide blocks (10) are both provided with side panels (11), and the controller (16) and the second telescopic cylinder (9) are mounted on the two side panels (11).

3. A plastic film laser cutting device according to claim 1, characterized in that: The spreading and cutting piece comprises a cutting groove (3) formed on the top of the base (1); the top of the base (1) is provided with clamping grooves (19) located on both sides of the cutting groove (3); the cutting groove (3) is located below the mounting seat (18); one side of the first movable slider (10) is provided with a pressing connecting plate (26) located above the clamping groove (19); the bottom of the first movable slider (10) is provided with a return spring (28) connected to the top of the base (1) and located outside the first guide rod (2); U-shaped plates (4) are installed on both sides of the base (1); the U-shaped plates (4) are provided with positioning racks (6); the first movable slider (10) is rotatably connected with a positioning rack located on the first guide rod (2); A rotating shaft (29) is provided on a side of the guide rod (2) close to the cutting groove (3), spur gears (7) meshing with the positioning rack (6) are installed on both sides of the rotating shaft (29), a second connecting plate (27) is installed on the side of the first movable slider (10) away from the first guide rod (2), a first telescopic cylinder (8) is installed on the top of the second connecting plate (27), the output end of the first telescopic cylinder (8) is connected to the first connecting plate (5) connected to the U-shaped plate (4), a counterweight swing plate (21) is provided on the rotating shaft (29), and a torsion spring (30) is clamped at the connection between the rotating shaft (29) and the first movable slider (10) through a clamping groove.

4. A plastic film laser cutting device according to claim 3, characterized in that: The distance between the rotating connecting shaft (29) and the cutting groove (3) is smaller than the distance between the pressing connecting plate (26) and the center of the cutting groove (3), and the bottom of the pressing connecting plate (26) fits in with the clamping groove (19).

5. The plastic film laser cutting device according to claim 3, characterized in that: The width of the counterweight swing plate (21) is smaller than the distance between the center of the rotating shaft (29) and the transverse center axis of the cutting groove (3).

6. The plastic film laser cutting device according to claim 3, characterized in that: The synchronous air filter comprises a second mounting frame (34) mounted on both sides of the second movable slider (15); a front ventilation pressure plate (20) is mounted on one end of the second mounting frame (34) away from the second movable slider (15); first mounting frames (25) are arranged on both sides of the side plate (11) close to the controller (16); a rear ventilation pressure plate (22) is mounted on one end of the first mounting frame (25) away from the side plate (11); a corrugated telescopic tube (17) connected to the rear ventilation pressure plate (22) is arranged on one side of the front ventilation pressure plate (20); and the front ventilation pressure plate (20) is provided with a plurality of first mounting frames (25). 20) A second one-way valve (32) is installed on the side away from the bellows expansion tube (17), a gas collecting pipe sleeve (13) is provided at the bottom of the mounting seat (18), an annular bin (33) is provided on the outer wall of the gas collecting pipe sleeve (13), a ventilation pipe (31) connected to the second one-way valve (32) is installed on the outer wall of the annular bin (33), an activated carbon placement bin (23) is installed on the side away from the bellows expansion tube (17) of the rear end ventilation pressure plate (22), and a first one-way valve (24) is installed on the side away from the rear end ventilation pressure plate (22).

7. A plastic film laser cutting device according to claim 6, characterized in that: The center of the gas collecting pipe sleeve (13) is coaxial with the laser beam emitted by the laser cutting machine body (14), and the inner wall diameter of the gas collecting pipe sleeve (13) is larger than the diameter of the laser beam emitted by the laser cutting machine body (14).

8. The plastic film laser cutting device according to claim 6, characterized in that: The exhaust end of the second one-way valve (32) is connected to the front ventilation pressure plate (20), and the intake end of the first one-way valve (24) is connected to the activated carbon storage bin (23).

9. The plastic film laser cutting device according to claim 6, characterized in that: The activated carbon storage bin (23) and the rear ventilation pressure plate (22), as well as the first one-way valve (24) and the activated carbon storage bin (23) are all detachably connected via threads.

10. The plastic film laser cutting device according to claim 6, characterized in that: The front ventilation pressure plate (20) and the rear ventilation pressure plate (22) are coaxial in center, and the front ventilation pressure plate (20) and the rear ventilation pressure plate (22) are at the same level.

Images