Pneumatic opening anti-falling device
By adjusting the material feed gap of the herringbone plate of the blown film machine using a pneumatic opening anti-fall device, the problems of film material joint jamming and herringbone plate falling off were solved, thus achieving stable production of the blown film machine.
Patent Information
- Application Number
- CN202522006433.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2035-09-18
AI Technical Summary
During the production process of blown film machines, the film material joints are prone to jamming or the herringbone plate is prone to falling, affecting normal production operation.
Design a pneumatic opening anti-fall device, which controls the opening and closing of the right herringbone plate by a cylinder, adjusts the size of the material passage gap, and supports the right herringbone plate by an anti-fall groove to prevent it from falling.
This effectively prevents the membrane material joints from getting stuck, ensures the membrane tube is properly flattened and wound up, prevents the herringbone plate from falling, and guarantees stable production operation.
Smart Images
Figure CN223493871U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a blown film machine, specifically to a herringbone frame component of the blown film machine. Background Technology
[0002] Film blowing machines are used for the production of various plastic bags. During the film blowing process, the film material blown out by the die head of the film blowing machine is in the form of a tube of a certain diameter, commonly known as a film tube. The film tube is first gradually flattened by the herringbone frame of the film blowing machine and then wound up. During the flattening process of the film tube, the gap formed by the left and right herringbone plates approaching each other at the top cannot be too large to ensure that the film tube is flattened sufficiently. However, when the die head of the film blowing machine begins to blow out the film tube, the size of the film joint is often relatively large. The film joint is prone to getting stuck when passing through the gap, affecting the normal operation of the film blowing production. In addition, in order to accommodate the passage of larger film joints, when the film gap is set elastically, the herringbone plate is prone to falling. Utility Model Content
[0003] In view of the technical problems existing in the prior art, the purpose of this utility model is to provide a pneumatic opening anti-fall device for a herringbone frame component for a blown film machine, which avoids the film material joint from getting stuck during the blown film production process and has a herringbone plate anti-fall protection function.
[0004] This utility model is implemented through the following technical solution:
[0005] A pneumatic opening anti-fall device includes a left herringbone plate and a right herringbone plate. The left and right herringbone plates are close to each other at the top and far apart at the bottom. When the left and right herringbone plates are close to each other at the top, they form a material passage gap. The device is characterized in that: a left shaft is fixedly connected to the top of the left herringbone plate, and the left shaft is fixed to a mounting plate. The mounting plate is fixedly connected to the frame of a blown film machine. A right shaft is fixedly connected to the top of the right herringbone plate, and the right shaft is fixed to a swing rod. The swing rod is swayable and mounted on the mounting plate. The swing rod is connected to a cylinder, and the cylinder is mounted on the mounting plate. An anti-fall groove is opened on the mounting plate at the position corresponding to the shaft end of the right shaft. The shaft end of the right shaft extends outward and falls into the anti-fall groove, where it is supported.
[0006] A window is opened at the top of the mounting plate, and an adjusting screw seat is fixedly connected to the edge of the window. An adjusting screw is set on the adjusting screw seat, facing the top right side of the swing rod.
[0007] With the above-mentioned technical solution, the pneumatic opening anti-fall device allows the right herringbone plate to open outward under the action of a cylinder when the blown film die head begins to blow out the film tube. If the size of the film joint is large, the top of the right herringbone plate can be widened by the cylinder (which can be manually controlled by the operator). This increases the material passage gap, allowing the larger film joint to pass through smoothly without getting stuck, ensuring normal blown film production. After the larger film joint passes through the material passage gap, the cylinder returns to its original position, reducing the gap and ensuring the film tube is sufficiently flattened. During this process, the anti-fall groove supports the right shaft end, preventing the right herringbone plate from falling due to movement, thus providing anti-fall protection. Finally, the adjusting screw ensures the lower limit of the swing arm's swing, maintaining a stable material passage gap. Attached Figure Description
[0008] The present invention includes the following figures:
[0009] Figure 1 This is a schematic diagram of the structure of this utility model.
[0010] Figure 2 for Figure 1 Enlarged view at the top.
[0011] In the diagram: 1. Left herringbone plate, 2. Right herringbone plate, 3. Left shaft, 4. Right shaft, 5. Mounting plate, 6. Swing rod, 7. Cylinder, 8. Anti-fall groove, 9. Swing shaft, 10. Adjusting screw seat, 11. Adjusting screw, 12. Window, 13. Material passage gap. Detailed Implementation
[0012] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:
[0013] As shown in the figure, this utility model discloses a pneumatic opening anti-fall device, which includes a left herringbone plate 1 and a right herringbone plate 2. The left and right herringbone plates are close to each other at the top and far apart at the bottom. When the left and right herringbone plates are close to each other at the top, they form a material passage gap 13. The top of the left herringbone plate 1 is fixedly connected to a left shaft 3, which is fixed to a mounting plate 5. The mounting plate 5 is fixedly connected to the frame of the blown film machine. The top of the right herringbone plate 2 is fixedly connected to a right shaft 4, which is fixed to a swing rod 6. The swing rod 6 is swayably connected to the mounting plate 5 through a swing shaft 9. The swing rod 6 is connected to a cylinder 7, which is installed on the mounting plate 5. The mounting plate 5 has an anti-fall groove 8 at the position corresponding to the shaft end of the right shaft 4. The shaft end of the right shaft 4 extends outward and falls into the anti-fall groove 8, where it is supported by the anti-fall groove 8. The mounting plate 5 has a window 12 on its upper part. An adjusting screw seat 10 is fixedly connected to the edge of the window 12. An adjusting screw 11 is provided on the adjusting screw seat 10 facing the top right side of the swing rod 6 to limit the downward swing of the swing rod 6 so that the material passage gap 13 can be stably maintained.
Claims
1. A pneumatic opening anti-fall device, comprising a left herringbone plate and a right herringbone plate, wherein the left and right herringbone plates are close to each other at the top and far apart at the bottom, and the left and right herringbone plates form a material passage gap after being close to each other at the top, characterized in that: The top of the left herringbone plate is fixedly connected to the left shaft, which is fixed to the mounting plate. The mounting plate is fixedly connected to the frame of the blown film machine. The top of the right herringbone plate is fixedly connected to the right shaft, which is fixed to the swing rod. The swing rod is swayable and mounted on the mounting plate. The swing rod is connected to a cylinder, which is mounted on the mounting plate. The mounting plate has an anti-fall groove at the position corresponding to the shaft end of the right shaft. The shaft end of the right shaft extends outward and falls into the anti-fall groove, where it is supported.
2. The pneumatic opening anti-fall device according to claim 1, characterized in that: A window is opened at the top of the mounting plate, and an adjusting screw seat is fixedly connected to the edge of the window. An adjusting screw is set on the adjusting screw seat, facing the top right side of the swing rod.