Film packaging bag slitting device

Abstract

The utility model relates to a cutting device field, specifically is a kind of film packaging bag cutting device, including cutting mechanism, the cutting mechanism includes cylinder, the cylinder output end is fixedly connected with No. 1 pressing plate, the left and right sides of No. 1 pressing plate are all fixedly connected with sliding block, cutting knife is fixedly connected with the middle part below No. 1 pressing plate, the front and rear sides below No. 1 pressing plate are all fixedly connected with fixed plate, the fixed plate below is fixedly connected with several dampers, the outside of fixed plate below around damper is fixedly connected with spring, the lower side of several dampers of one side is fixedly connected with No. 2 pressing plate, No. 2 pressing plate upper side is fixedly connected with the other end of damper, the lower side of No. 2 pressing plate is fixedly connected with rubber layer;The utility model reaches the effect that the cutting mouth skew caused by displacement is completely eliminated by cutting mechanism, and through the cooperation of adjusting stick and driving mechanism reaches the real-time compensation tension fluctuation, and makes the tension stability improve 60%.

Description

Technical Field

[0001] This utility model relates to the field of slitting devices, specifically a film packaging bag slitting device. Background Technology

[0002] Film packaging bags are flexible packaging containers made primarily of plastic film, widely used in food, daily necessities, pharmaceuticals, and industrial fields. Their core characteristics are lightweight, low cost, and strong sealing performance, while also allowing for diverse functions through printing and lamination processes.

[0003] A film packaging bag slitting device is a specialized piece of equipment used in the film packaging bag production process to precisely cut continuous rolls of film (or pre-processed packaging bag rolls) according to preset dimensions (width, length). Its core function is to slit wide rolls into narrow rolls, or to cut semi-finished packaging bags to a fixed length, providing compliant substrates for subsequent bag making, printing, and sealing processes. It is widely used in the packaging production fields of food, daily chemicals, and pharmaceuticals.

[0004] When the film is cut, the contact point of the blade will generate instantaneous tension, which can easily lead to local wrinkles or displacement. In addition, in traditional slitting equipment, the tension of the film before and after the slitting blade is prone to fluctuation due to the speed difference (especially during the start-up and stop phases), resulting in wavy or stretched deformation at the cut edge. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, when the film is cut, the contact point of the blade will generate instantaneous tension, which can easily lead to local wrinkles or displacement. In addition, in traditional slitting equipment, the tension of the film before and after the slitting blade is prone to fluctuation due to speed difference (especially during start-up and stop), resulting in wavy or stretched deformation of the cut edge. This utility model proposes a film packaging bag slitting device.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a film packaging bag cutting device, including a cutting mechanism, the cutting mechanism including a cylinder, a first pressure plate fixedly connected to the output end of the cylinder, sliding blocks fixedly connected to both sides of the first pressure plate, a cutting blade fixedly connected to the lower center of the first pressure plate, fixed plates fixedly connected to both the front and rear sides of the first pressure plate, several dampers fixedly connected to the lower part of the fixed plates, springs fixedly connected to the lower part of the fixed plates around the outer side of the dampers, a second pressure plate fixedly connected to the lower part of the several dampers on one side, the upper part of the second pressure plate fixedly connected to the other end of the damper, and a rubber layer fixedly connected to the lower part of the second pressure plate.

[0007] Preferably, a gantry frame is fixedly connected to the outer wall of the cylinder. The gantry frame includes an upper plate frame. Side plate frames are fixedly connected to the left and right sides below the upper plate frame. A sliding groove is opened on the opposite surface of the two side plate frames. The inner wall of the upper plate frame is fixedly connected to the outer wall of the cylinder. The outer wall of the first sliding groove is slidably connected to the inner wall of the sliding block.

[0008] Preferably, the upper plate frame has adjusting rods on both the front and rear sides. Each adjusting rod includes four support frames. The opposing surfaces of the support frames on the left and right sides are provided with a second sliding groove. The left side of the second sliding groove on the left side extends through the support frame to the outside. The inner walls of the support frames on the left and right sides are slidably connected to transmission rods. The left sides of the two transmission rods are rotatably connected to connecting rods, and the middle of the connecting rods is fixedly connected to a fixing block.

[0009] Preferably, the inner wall of the fixing block is threaded with a driving mechanism, the driving mechanism includes a motor, the output end of the motor is fixedly connected to a threaded rod, and the upper and lower outer walls of the threaded rod are rotatably connected to fixed seats, with the upper fixed seat fixedly connected to the lower part of the motor.

[0010] Preferably, the outer wall of the threaded rod is threaded to the inner wall of the fixing block, and the right side of the fixing seat is fixedly connected to the left side of the left side plate frame.

[0011] Preferably, a first workbench is fixedly connected below the support frame, the first workbench includes a second workbench, an unwinding mechanism is provided on the front side above the second workbench, and a winding mechanism is provided on the rear side above the second workbench.

[0012] Preferably, the upper part of the second workbench is fixedly connected to the lower part of the side panel frame, and the upper part of the second workbench is fixedly connected to the lower part of the support frame.

[0013] The advantages of this utility model are:

[0014] This invention uses a cylinder output to push a first pressure plate, which in turn drives a sliding block to slide in a first sliding groove. The fixed plate moves downward, causing a damper to press the second pressure plate and the rubber layer onto the film. The second pressure plate, through the pre-pressure provided by the spring and the adaptive damping adjustment of the damper, firmly presses the film onto the worktable. The 0.5mm thick rubber layer with a Shore hardness of 50A increases friction, controlling the film displacement within 50mm of the cutting point to be within 0.1mm. Then, the cutting blade cuts the film downward, completely eliminating the skewed cut caused by displacement. This solves the problem that when the film is cut, the blade contact point generates instantaneous tension, which can easily lead to local wrinkles or displacement.

[0015] This invention uses a motor output to drive a threaded rod to rotate. After the threaded rod rotates with the fixed block, the fixed block moves, causing the connecting rod to move. The connecting rod then drives two transmission rollers to slide with the second sliding groove for adjustment. This achieves real-time compensation for tension fluctuations, improving tension stability by more than 60%. It solves the problem that the film tension before and after the slitting blade is prone to fluctuations due to speed differences, especially during start-up and stop, which can lead to wavy or stretched deformation at the cutting edge. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the slitting mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the adjusting rod and driving mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the gantry frame and the No. 1 workbench of this utility model.

[0022] In the diagram: 1. Sliding mechanism; 2. Gantry frame; 3. Adjusting roller; 4. Drive mechanism; 5. Workbench No. 1; 11. Cylinder; 12. Pressure plate No. 1; 13. Sliding block; 14. Sliding knife; 15. Fixed plate; 16. Damper; 17. Spring; 18. Pressure plate No. 2; 19. Rubber layer; 21. Upper plate frame; 22. Side plate frame; 23. Sliding groove No. 1; 31. Support frame; 32. Sliding groove No. 2; 33. Transmission roller; 34. Connecting rod; 35. Fixed block; 41. Motor; 42. Threaded rod; 43. Fixed seat; 51. Workbench No. 2; 52. Unwinding mechanism; 53. Rewinding mechanism. Detailed Implementation

[0023] 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.

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses a film packaging bag cutting device. (Refer to...) Figure 1 and Figure 3 A film packaging bag slitting device includes a slitting mechanism 1, which includes a cylinder 11. A first pressure plate 12 is fixedly connected to the output end of the cylinder 11. Sliding blocks 13 are fixedly connected to both sides of the first pressure plate 12. A slitting knife 14 is fixedly connected to the lower center of the first pressure plate 12. Fixed plates 15 are fixedly connected to both the front and rear sides of the first pressure plate 12. Several dampers 16 are fixedly connected to the lower part of the fixed plates 15. Springs 17 are fixedly connected to the lower part of the fixed plates 15 around the outer side of the dampers 16. A second pressure plate 18 is fixedly connected to the lower part of one of the dampers 16. The upper part of the second pressure plate 18 is fixedly connected to the other end of the damper 16. A rubber layer 19 is fixedly connected to the lower part of the second pressure plate 18.

[0026] The slitting mechanism 1 addresses the issue of instantaneous tension at the blade contact point during film cutting, which can easily lead to localized wrinkles or misalignment. During operation, the output end of cylinder 11 pushes the first pressure plate 12, which in turn causes the sliding block 13 to slide against the first sliding groove 23. The fixed plate 15 moves downwards, causing the damper 16 to press the second pressure plate 18 against the rubber layer 19, securing the film. The second pressure plate 18, through the preload provided by spring 17 and the adaptive damping adjustment of the damper, firmly presses the film onto the worktable. A 0.5mm thick rubber layer 19 with a Shore hardness of 50A increases friction, controlling the film displacement within 50mm of the cutting point to within 0.1mm. Then, the slitting blade 14 cuts the film downwards, completely eliminating the skewed cut caused by displacement. The elastic deformation range of the spring 17 is 0-10mm. With the adaptive damping adjustment of the damper 16, the height of the second pressure plate 18 can be automatically adjusted according to the film thickness, and the pressure fluctuation does not exceed ±2N, realizing compatible slitting from ultra-thin to thick films.

[0027] Reference Figure 4 and Figure 5A gantry frame 2 is fixedly connected to the outer wall of cylinder 11. The gantry frame 2 includes an upper plate frame 21. Side plate frames 22 are fixedly connected to the left and right sides below the upper plate frame 21. A first sliding groove 23 is opened on the opposite surface of the two side plate frames 22. The inner wall of the upper plate frame 21 is fixedly connected to the outer wall of cylinder 11. The outer wall of the first sliding groove 23 is slidably connected to the inner wall of the sliding block 13. There are adjusting rods 3 on the front and rear sides of the upper plate frame 21. The adjusting rods 3 include four support frames 31. A second sliding groove 32 is opened on the opposite surface of the left and right support frames 31. The left second sliding groove 32 passes through the support frame 31 to the outside. A transmission rod 33 is slidably connected to the inner wall of the left and right support frames 31. A connecting rod 34 is rotatably connected to the left side of the two transmission rods 33. A fixing block 35 is fixedly connected to the middle of the connecting rod 34. A drive mechanism 4 is threadedly connected to the inner wall of block 35. The drive mechanism 4 includes a motor 41. A threaded rod 42 is fixedly connected to the output end of the motor 41. Fixed seats 43 are rotatably connected to the upper and lower outer walls of the threaded rod 42. The upper fixed seat 43 is fixedly connected to the lower part of the motor 41. The outer wall of the threaded rod 42 is threadedly connected to the inner wall of the fixed block 35. The right side of the fixed seat 43 is fixedly connected to the left side of the left side plate frame 22. A first workbench 5 is fixedly connected to the lower part of the support frame 31. The first workbench 5 includes a second workbench 51. A winding mechanism 52 is provided on the front side of the second workbench 51. A winding mechanism 53 is provided on the rear side of the second workbench 51. The upper part of the second workbench 51 is fixedly connected to the lower part of the side plate frame 22. The upper part of the second workbench 51 is fixedly connected to the lower part of the support frame 31.

[0028] The adjusting roller 3, in conjunction with the drive mechanism 4, can solve the problem of film tension fluctuations before and after the slitting blade in slitting equipment due to speed differences, especially during start-up and shutdown, which can lead to wavy or stretched deformation at the cutting edge. During use, the output end of the motor 41 drives the threaded rod 42 to rotate. After the threaded rod 42 rotates with the fixed block 35, the fixed block 35 moves, driving the connecting rod 34 to move. The connecting rod 34 drives the two transmission rollers 33 to slide with the second sliding groove 32 for adjustment. The synchronously raised and lowered transmission rollers 33 can be adjusted in relative height to the blade assembly within a range of 0-80mm, forming a "reverse V" or "normal V" wrap angle with an adjustment range of 15°-45°. Combined with the synchronous change of roller surface pressure, the drive mechanism 4 achieves 5-50N pressure adjustment, real-time compensation for tension fluctuations, and improves tension stability by more than 60%. It is particularly suitable for slitting ultra-thin films with a thickness of 0.01-0.1mm.

[0029] Working principle: When the film is being cut, the blade contact point generates instantaneous tension, which can easily lead to local wrinkles or displacement. During use, the output end of the cylinder 11 pushes the first pressure plate 12. The first pressure plate 12 drives the sliding block 13 to slide with the first sliding groove 23. The fixed plate 15 moves downward, driving the damper 16 to press the second pressure plate 18 and the rubber layer 19 to hold the film in place. The second pressure plate 18, through the pre-pressure provided by the spring 17 and the adaptive damping adjustment of the damper, firmly presses the film onto the worktable. The surface is reinforced with a 0.5mm thick rubber layer 19 with a Shore hardness of 50A to increase friction, so that the displacement of the film within 50mm around the cutting point is controlled within 0.1mm. Then, the cutting blade 14 cuts the film downwards, completely eliminating the skew of the cut caused by displacement. The elastic deformation range of the spring 17 is 0-10mm. With the adaptive damping adjustment of the damper 16, the height of the second pressure plate 18 can be automatically adjusted according to the film thickness, and the pressure fluctuation does not exceed ±2N, realizing compatible cutting of films from ultra-thin to thick.

[0030] The adjusting roller 3, in conjunction with the drive mechanism 4, can solve the problem of film tension fluctuations before and after the slitting blade in slitting equipment due to speed differences, especially during start-up and shutdown, which can lead to wavy or stretched deformation at the cutting edge. During use, the output end of the motor 41 drives the threaded rod 42 to rotate. After the threaded rod 42 rotates with the fixed block 35, the fixed block 35 moves, driving the connecting rod 34 to move. The connecting rod 34 drives the two transmission rollers 33 to slide with the second sliding groove 32 for adjustment. The synchronously raised and lowered transmission rollers 33 can be adjusted in relative height to the blade assembly within a range of 0-80mm, forming a "reverse V" or "normal V" wrap angle with an adjustment range of 15°-45°. Combined with the synchronous change of roller surface pressure, the drive mechanism 4 achieves 5-50N pressure adjustment, real-time compensation for tension fluctuations, and improves tension stability by more than 60%. It is particularly suitable for slitting ultra-thin films with a thickness of 0.01-0.1mm.

[0031] 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 film packaging bag cutting device, comprising a cutting mechanism (1), characterized in that: The slitting mechanism (1) includes a cylinder (11), the output end of which is fixedly connected to a first pressure plate (12). Sliding blocks (13) are fixedly connected to both sides of the first pressure plate (12). A slitting blade (14) is fixedly connected to the middle of the lower part of the first pressure plate (12). Fixed plates (15) are fixedly connected to both the front and rear sides of the lower part of the first pressure plate (12). Several dampers (16) are fixedly connected to the lower part of the fixed plates (15). Springs (17) are fixedly connected to the lower part of the fixed plates (15) around the outer side of the dampers (16). A second pressure plate (18) is fixedly connected to the lower part of several dampers (16) on one side. The upper part of the second pressure plate (18) is fixedly connected to the other end of the damper (16). A rubber layer (19) is fixedly connected to the lower part of the second pressure plate (18).

2. The film packaging bag cutting device according to claim 1, characterized in that: A gantry frame (2) is fixedly connected to the outer wall of the cylinder (11). The gantry frame (2) includes an upper plate frame (21). Side plate frames (22) are fixedly connected to the left and right sides below the upper plate frame (21). A sliding groove (23) is opened on the opposite side of the two side plate frames (22). The inner wall of the upper plate frame (21) is fixedly connected to the outer wall of the cylinder (11). The outer wall of the first sliding groove (23) is slidably connected to the inner wall of the sliding block (13).

3. The film packaging bag cutting device according to claim 2, characterized in that: The upper plate frame (21) has adjusting rods (3) on the front and rear sides. The adjusting rods (3) include four support frames (31). The support frames (31) on the left and right sides are provided with second sliding grooves (32) on opposite sides. The second sliding groove (32) on the left side passes through the support frame (31) to the outside. The inner walls of the support frames (31) on the left and right sides are slidably connected with transmission rods (33). The two transmission rods (33) are rotatably connected to the left side with connecting rods (34). The middle part of the connecting rods (34) is fixedly connected with a fixing block (35).

4. The film packaging bag cutting device according to claim 3, characterized in that: The inner wall of the fixed block (35) is threaded with a drive mechanism (4), which includes a motor (41). The output end of the motor (41) is fixedly connected to a threaded rod (42). The upper and lower outer walls of the threaded rod (42) are rotatably connected to fixed seats (43). The upper fixed seat (43) is fixedly connected to the lower part of the motor (41).

5. A film packaging bag cutting device according to claim 4, characterized in that: The outer wall of the threaded rod (42) is threadedly connected to the inner wall of the fixing block (35), and the right side of the fixing seat (43) is fixedly connected to the left side of the left side plate frame (22).

6. The film packaging bag cutting device according to claim 3, characterized in that: A first workbench (5) is fixedly connected below the support frame (31). The first workbench (5) includes a second workbench (51). A winding mechanism (52) is provided on the front side above the second workbench (51), and a winding mechanism (53) is provided on the rear side above the second workbench (51).

7. A film packaging bag cutting device according to claim 6, characterized in that: The second workbench (51) is fixedly connected above the side plate frame (22) and below the support frame (31).

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