A cutting aid for polyester film slit production
By designing a cutting auxiliary device for polyester film production, the problem of discontinuous cutting caused by film tension fluctuations was solved by using the combination of clamping components and hydraulic cylinders, thus achieving precise cutting and improving production progress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-10
AI Technical Summary
During the production of polyester film, fluctuations in film tension make it difficult for the cutter to continuously slice the film, affecting the production schedule.
A cutting auxiliary device is designed, comprising a transverse section, a first clamping section, and a second clamping section. The clamping component is driven by a hydraulic cylinder to tighten and flatten the film, ensuring that the tension of the film under the cutter is uniform and flat.
It enables reliable and precise cutting of the film by the cutter, improving production efficiency and cutting quality.
Smart Images
Figure CN224476277U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a cutting auxiliary device, and more particularly to a device that can assist a cutting machine in making precise and straight cuts to polyester film, belonging to the technical field of polyester film cutting auxiliary equipment. Background Technology
[0002] The polyester film production line's sheeting process is as follows: die casting to cold roll casting—sheeting to longitudinal stretching—transverse stretching—traction—winding. A cutting machine is installed in the longitudinal stretching to transverse stretching process to cut the polyester film, cutting along the width of the film. During the longitudinal stretching to transverse stretching process, the cutting machine is typically installed above the film at the longitudinal stretching exit position, with the cutter cutting along the width of the film. In actual production, tension fluctuations in the film, caused by tension fluctuations in the auxiliary roll or online shredder, result in film vibration, leading to insufficient cutting depth and preventing continuous film cutting, thus affecting production progress. Therefore, an auxiliary device is needed to increase the tension of the portion of the film below the cutter, ensuring smooth cutting of the film. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cutting auxiliary device for polyester film threading production, which can ensure that the cutter can reliably and accurately cut the film.
[0004] The problem described in this utility model is solved by the following technical solution:
[0005] A cutting auxiliary device for polyester film threading production includes a traversing section, a first clamping section, a second clamping section, and a hydraulic cylinder; the traversing section is disposed on the ground and located on one side of the polyester film on the production line; both the first clamping section and the second clamping section are disposed on the traversing section; the hydraulic cylinder is disposed on the first clamping section; the structures of the first clamping section and the second clamping section are completely identical; the second clamping section is located directly below the cutter track.
[0006] The above-mentioned cutting auxiliary device for polyester film threading production includes a horizontal moving part comprising a horizontal plate; the horizontal plate is mounted on the ground by a bracket; the center line of the horizontal plate is a horizontal line; and a slide rail is provided on the end face of the horizontal plate near the polyester film along its center line direction.
[0007] The above-mentioned cutting auxiliary device for polyester film threading production includes a first clamping part comprising a fixing block and a first clamping member; the fixing block is disposed at the end face of the horizontal plate near the polyester film; there are two first clamping members, which are symmetrically disposed on the top and bottom faces of the fixing block, and the two first clamping members are respectively located directly above and directly below the polyester film.
[0008] The aforementioned cutting auxiliary device for polyester film threading production includes a first clamping component comprising a first lifting platform, a first guide rod, a first electric cylinder, a first crossbar, a first vertical plate, and a first circular roller. The first electric cylinder is mounted on the first lifting platform, with the end of its piston rod connected to a fixed block. The first lifting platform has a guide hole through which the first guide rod passes, and the end of the first guide rod is mounted on the fixed block. The axis of the first guide rod is parallel to the axis of the piston rod of the first electric cylinder, and both are perpendicular lines. Both ends of the first crossbar are provided with first vertical plates, and both ends of the first circular roller are respectively axially connected to the two first vertical plates. The combination of the first vertical plate and the first crossbar is mounted on the first lifting platform. The axis of the first circular roller is parallel to the width direction of the polyester film.
[0009] The aforementioned cutting auxiliary device for polyester film threading production includes a second clamping part comprising a slider and a second clamping member; the slider is slidably mounted on a slide rail of a horizontal plate; there are two second clamping members, which are symmetrically arranged on the top and bottom surfaces of the slider, with the two second clamping members located directly above and below the polyester film, respectively; the hydraulic cylinder housing is mounted on a fixed block, and the end of its piston rod is connected to the slider; the axis of the hydraulic cylinder piston rod is parallel to the center line of the horizontal plate.
[0010] The aforementioned cutting auxiliary device for polyester film threading production includes a second clamping component comprising a second lifting platform, a second guide rod, a second electric cylinder, a second crossbar, a second vertical plate, and a second circular roller. The second electric cylinder is mounted on the second lifting platform, with its piston rod end connected to a slider. The second lifting platform has a guide hole, through which the second guide rod passes, and its end is mounted on the slider. The axis of the second guide rod is parallel to the axis of the piston rod of the second electric cylinder, and both are perpendicular lines. The second crossbar has two second vertical plates at both ends, and the two ends of the second circular roller are respectively axially connected to the two second vertical plates. The combination of the second vertical plate and the second crossbar is mounted on the second lifting platform. The axis of the second circular roller is parallel to the width direction of the polyester film.
[0011] This invention uses a transverse movement portion to drive the movement of the second clamping portion, thereby enabling the first clamping portion and the second clamping portion to work together to spread and tighten the film, ensuring that the portion of the film that the cutter passes through is in a taut state and without fluctuations when cutting along the width direction of the film, thus ensuring the smooth progress of the cutting operation. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention;
[0013] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.
[0014] The list of labels in the diagram is as follows: 1. Hydraulic cylinder, 2. Cutter, 3. Horizontal plate, 4. Fixing block, 5. First lifting platform, 6. First guide rod, 7. First electric cylinder, 8. First crossbar, 9. First vertical plate, 10. First roller, 11. Slider, 12. Second clamping component. Detailed Implementation
[0015] See Figure 1 and Figure 2 This utility model includes a transverse moving part, a first clamping part, a second clamping part, and a hydraulic cylinder 1. The transverse moving part is set on the ground and is located on one side of the polyester film on the production line. The cooperation between the transverse moving part and the hydraulic cylinder 1 allows the first clamping part and the second clamping part to move away from each other, and during the moving away process, the film directly below the cutter is smoothed to ensure that the film below the cutter is flat and taut, ensuring that the cutter can smoothly complete the cutting operation. The first clamping part and the second clamping part are both set on the transverse moving part. The hydraulic cylinder 1 is set on the first clamping part. The structure of the first clamping part and the structure of the second clamping part are completely identical. The second clamping part is located directly below the track of the cutter 2. When the second clamping part moves away from the first clamping part, the cutter 2 is located between the two clamping parts. That is to say, the two clamping parts tighten and flatten the part of the film that the cutter is about to pass through.
[0016] The lateral movement section includes a horizontal plate 3; the horizontal plate 3 is mounted on the ground by a bracket; the center line of the horizontal plate 3 is a horizontal line; a slide rail is provided on the end face of the horizontal plate 3 near the polyester film along its center line direction.
[0017] The first clamping part includes a fixing block 4 and a first clamping member; the fixing block 4 is disposed at the end face of the horizontal plate 3 near the polyester film; there are two first clamping members, which are symmetrically disposed on the top and bottom surfaces of the fixing block 4, and the two first clamping members are respectively located directly above and directly below the polyester film; the two first clamping members can approach each other and clamp the film, and after the clamping members on both sides clamp the film, they roll away from each other. During the process of the two rollers moving away from each other, the flatness of the film is leveled, and a certain tension is provided for the film below the cutter.
[0018] The first clamping component includes a first lifting platform 5, a first guide rod 6, a first electric cylinder 7, a first crossbar 8, a first vertical plate 9, and a first circular roller 10. The first electric cylinder 7 is mounted on the first lifting platform 5, and the end of its piston rod is connected to the fixed block 4. The first lifting platform 5 has a guide hole, and the first guide rod 6 passes through the guide hole of the first lifting platform 5. The end of the first guide rod 6 is mounted on the fixed block 4. The axis of the first guide rod 6 is parallel to the axis of the piston rod of the first electric cylinder 7, and both are perpendicular lines. The extension and retraction of the piston rod of the first electric cylinder 7 drives the first lifting platform 5 to move closer to or away from the fixed block 4, thereby driving the circular roller to move closer to or away from the film. The movement of the upper and lower electric cylinders drives the two circular rollers to move closer, thereby clamping the film. The first crossbar 8 has a first vertical plate 9 at both ends, and the two ends of the first circular roller 10 are respectively axially connected to the two first vertical plates 9. The first vertical plate 9 and the first crossbar 8 are combined and mounted on the first lifting platform 5. The axis of the first roller 10 is parallel to the width direction of the polyester film. Two rollers in the same clamping part are used as a group to clamp the film. After the first group of rollers clamps the film, the position is fixed. After the second group of rollers clamps the film, it moves away from the first group of rollers. During the process of the second group of rollers clamping the film and moving, the second group of rollers rotates during the movement to avoid excessive pulling force on the film during the movement of the clamped film. The friction between the second group of rollers and the film is mainly static friction rather than sliding friction, which minimizes the wear on the film. During the movement of the second group of rollers, the film along the way is flattened to make it flatter. After the second group of rollers is in place, the cutter is located between the two groups of rollers, and there is a certain tension in the film between the two groups of rollers. At this time, the part of the film cut by the cutter is flat and taut.
[0019] The second clamping part includes a slider 11 and a second clamping member 12; the principle of the second clamping member 12 is the same as that of the first clamping member; the slider 11 is slidably mounted on the slide rail of the horizontal plate 3; there are two second clamping members 12, which are symmetrically arranged on the top and bottom surfaces of the slider 11, and the two second clamping members 12 are located directly above and directly below the polyester film, respectively; the housing of the hydraulic cylinder 1 is mounted on the fixed block 4, and the end of its piston rod is connected to the slider 11; the axis of the piston rod of the hydraulic cylinder 1 is parallel to the center line of the horizontal plate 3.
[0020] The second clamping member 12 includes a second lifting platform, a second guide rod, a second electric cylinder, a second crossbar, a second vertical plate, and a second circular roller. The second electric cylinder is mounted on the second lifting platform, and the end of its piston rod is connected to the slider 11. The second lifting platform is provided with a guide hole, and the second guide rod passes through the guide hole of the second lifting platform. The end of the second guide rod is mounted on the slider 11. The axis of the second guide rod is parallel to the axis of the piston rod of the second electric cylinder, and both are vertical lines. The two ends of the second crossbar are provided with second vertical plates, and the two ends of the second circular roller are respectively axially mounted on the two second vertical plates. The combination of the second vertical plate and the second crossbar is mounted on the second lifting platform. The axis of the second circular roller is parallel to the width direction line of the polyester film.
[0021] Operating principle: In the initial state, the two first rollers are far apart, and the two rollers in the second clamping member are also far apart, and the piston rod of the hydraulic cylinder 1 is in the retracted state. At this time, the slider 11 is close to the fixed block 4. When the cutting operation is required, all cylinders are activated, the two first rollers approach and clamp the film, and the two rollers in the second clamping member also approach and clamp the film. Then, the hydraulic cylinder 1 is activated to push the slider 11, so that the slider 11 moves away from the fixed block 4. During this process, the two rollers on the second clamping member 12 roll while clamping the film. At this time, the two rollers flatten the film they pass through, so that it minimizes undulations, and the film between the two rollers and the first roller 10 is tightened to a certain extent after being pulled away. At this time, the cutter is located between the two sets of rollers, and then the cutting machine is started so that the cutter moves along the predetermined trajectory and cuts along the width direction of the film.
[0022] In the above process, the film can be in a stationary state or a moving state. In the stationary state, the device can ensure that the part corresponding to the film cutting line is flat, provide a certain tension to the pre-cut film part, and the part on the film cutting line is all at the same height of the cutter, ensuring that the cutter can cut smoothly. In the moving state, the end of the film is cut into a bevel shape. In the moving state, the device can ensure that the film below the cutter is flat, and the height of the film below the cutter can be aligned with the cutter, ensuring that the cutter can cut smoothly.
Claims
1. A cutting auxiliary device for polyester film threading production, characterized in that: It includes a transverse section, a first clamping section, a second clamping section, and a hydraulic cylinder (1); the transverse section is set on the ground and is located on one side of the polyester film on the production line; the first clamping section and the second clamping section are both set on the transverse section; the hydraulic cylinder (1) is set on the first clamping section; the structure of the first clamping section and the structure of the second clamping section are completely identical; the second clamping section is located directly below the track of the cutter (2).
2. The cutting auxiliary device for polyester film threading production according to claim 1, characterized in that: The transverse section includes a horizontal plate (3); the horizontal plate (3) is set on the ground by a bracket; the center line of the horizontal plate (3) is a horizontal line; a slide rail is provided on the end face of the horizontal plate (3) near the polyester film along its center line direction.
3. The cutting auxiliary device for polyester film threading production according to claim 2, characterized in that: The first clamping part includes a fixing block (4) and a first clamping member; the fixing block (4) is disposed at the end face of the horizontal plate (3) near the polyester film; there are two first clamping members, which are symmetrically disposed on the top and bottom faces of the fixing block (4), and the two first clamping members are located directly above and directly below the polyester film, respectively.
4. The cutting auxiliary device for polyester film threading production according to claim 3, characterized in that: The first clamping component includes a first lifting platform (5), a first guide rod (6), a first electric cylinder (7), a first crossbar (8), a first vertical plate (9), and a first circular roller (10); the first electric cylinder (7) is mounted on the first lifting platform (5), and the end of its piston rod is connected to the fixed block (4). The first lifting platform (5) is provided with a guide hole, and the first guide rod (6) passes through the guide hole of the first lifting platform (5). The end of the first guide rod (6) is mounted on the fixed block (4); the axis of the first guide rod (6) is parallel to the axis of the piston rod of the first electric cylinder (7), and both are vertical lines; the first crossbar (8) is provided with a first vertical plate (9) at both ends, and the two ends of the first circular roller (10) are respectively axially mounted on the two first vertical plates (9); the combination of the first vertical plate (9) and the first crossbar (8) is mounted on the first lifting platform (5); the axis of the first circular roller (10) is parallel to the width direction line of the polyester film.
5. The cutting auxiliary device for polyester film threading production according to claim 4, characterized in that: The second clamping part includes a slider (11) and a second clamping member (12); the slider (11) is slidably disposed on the slide rail of the horizontal plate (3); there are two second clamping members (12), which are symmetrically disposed on the top and bottom surfaces of the slider (11), and the two second clamping members (12) are located directly above and directly below the polyester film, respectively; the housing of the hydraulic cylinder (1) is disposed on the fixed block (4), and the end of its piston rod is connected to the slider (11); the axis of the piston rod of the hydraulic cylinder (1) is parallel to the center line of the horizontal plate (3).
6. The cutting auxiliary device for polyester film threading production according to claim 5, characterized in that: The second clamping member (12) includes a second lifting platform, a second guide rod, a second electric cylinder, a second crossbar, a second vertical plate, and a second circular roller; the second electric cylinder is disposed on the second lifting platform, and the end of its piston rod is connected to the slider (11); the second lifting platform is provided with a guide hole, and the second guide rod passes through the guide hole of the second lifting platform; the end of the second guide rod is disposed on the slider (11); the axis of the second guide rod is parallel to the axis of the piston rod of the second electric cylinder, and both are vertical lines; the two ends of the second crossbar are provided with second vertical plates, and the two ends of the second circular roller are respectively axially connected to the two second vertical plates; the combination of the second vertical plate and the second crossbar is disposed on the second lifting platform; the axis of the second circular roller is parallel to the width direction line of the polyester film.