Edge trimmer adjustment mechanism for a film blowing machine
By installing a herringbone plate opening and closing adjustment component and an edge inserter adjustment component on the blown film machine, the film quality problem caused by improper edge inserter position adjustment was solved, achieving uniform pressing and stable forming of the film edge and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGJIN RUIHANG PLASTICS MASCH CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-06-05
AI Technical Summary
When producing plastic film, improper adjustment of the edge inserter position or inconsistent opening and closing angles of the herringbone plate can lead to film quality problems. The edge inserter is prone to tilting and shifting, has poor adjustment accuracy, and is difficult to achieve uniform pressing.
The system employs a herringbone plate opening and closing adjustment assembly and an edge inserter adjustment assembly. Through a lifting screw and slide rail structure, it achieves uniform opening and closing of the herringbone plate and precise positioning of the edge inserter, ensuring that the edge inserter remains vertical during traction. Linear bearings and guide shafts are used to adjust the edge inserter spacing, replacing the traditional screw structure.
It improves the quality of film edge forming, solves the problem of uneven edge pressing, reduces adjustment difficulty, and improves production efficiency.
Smart Images
Figure CN224323565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blown film machine technology, and specifically to an adjustment mechanism for the edge inserter of a blown film machine. Background Technology
[0002] When producing plastic film, the blown film machine first extrudes the film through a die head and then blows it into a film tube. The tube is then pulled and flattened by the herringbone plate on the traction device, turning it into a sheet. Finally, it is wound up by the winding device.
[0003] Because the packaging bags produced from plastic film have different uses, the insert plates on the traction mechanism need to be inserted on both sides of the plastic film packaging bag. Depending on the size of the plastic film packaging bag, the distance and angle between the left and right insert plates need to be adjusted. As the film passes through the inserter, it is pushed into the center of the film by the inserter to form an inward folded edge structure. In combination with the herringbone plate, a flattened roll film with an inward folded edge structure is obtained.
[0004] The following problems exist in the process of flattening film using herringbone plates and edge inserters: 1) Improper adjustment of the edge inserter position or different opening and closing angles of the two herringbone plates during the stretching process can lead to uneven extrusion and film quality problems; 2) When the position of the edge inserter changes, it may tilt or shift, resulting in uneven edge pressing; 3) When the position of the edge inserter is adjusted on the traction frame, due to the use of a traditional lead screw structure, there are problems such as poor edge insertion accuracy and difficulty in adjustment when adjusting the position of the edge inserter. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide an edge insertion adjustment mechanism for a blown film machine, which can solve the problems of low edge forming quality and uneven edge pressing of the film.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.
[0007] An edge inserter adjustment mechanism for a blown film machine includes a traction frame with traction plates on its left and right sides. Two symmetrically arranged herringbone plates are installed inside the traction frame, with the top of each herringbone plate hinged to a herringbone plate support rod passing between the two traction plates. Herringbone plate opening and closing adjustment components for adjusting the opening and closing degree of the herringbone plates are installed on the lower left and right sides of the traction frame. Two edge inserters are installed opposite each other in the middle of the herringbone plates. Two spaced-apart crossbars are installed on the left and right sides of the traction frame, and edge inserter adjustment components for adjusting the position of the edge inserters are installed on the crossbars.
[0008] The above-mentioned blowing film machine edge insert adjustment mechanism includes a herringbone plate opening and closing adjustment component comprising a lifting screw and a lifting screw seat. The lifting screw is mounted on a lifting screw mounting plate on the bottom support rod of the traction frame. The lifting screw seat has an internal thread that is threaded to the lifting screw. Symmetrical hinge seats are provided on the outside of the lifting screw seat. The hinge seats are respectively hinged to the lifting connecting plate. The other end of the lifting connecting plate is hinged to the lower part of the herringbone plate on the corresponding side.
[0009] The above-mentioned blowing film machine edge inserter adjustment mechanism includes an edge inserter adjustment assembly comprising a slide rail mounted on a crossbar, the slide rail being slidably connected to a slider, a slider connecting plate being mounted on the top of the slider, and the slider connecting plate being connected to the edge inserter.
[0010] In the above-mentioned blowing film machine edge inserter adjustment mechanism, a linear bearing is provided on the slider connecting plate, the linear bearing is slidably connected to the guide shaft, and one end of the guide shaft is connected to the edge inserter.
[0011] In the above-mentioned blowing film machine edge inserter adjustment mechanism, the traction plate has a front-to-back moving groove, the herringbone plate support rod is slidably disposed in the moving groove, and the herringbone plate support rod is locked to the traction plate by a locking nut.
[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.
[0013] This utility model provides an edge inserter adjustment mechanism for a blown film machine. By setting a herringbone plate opening and closing component between two herringbone plates, and ensuring that the two herringbone plates maintain the same opening and closing angle under the limit of the lifting connecting plate, it ensures that the force on both sides is uniform and the extrusion is flat during the film bubble extrusion process. By setting an edge inserter adjustment component arranged vertically and horizontally in the middle of the traction frame and connecting it to the edge inserter, it ensures that the edge inserter always remains in a vertical state during the movement and will not deviate. This allows for smooth guidance of the film when it passes through the edge inserter, ensuring the stability of the film bubble folding process. This solves the problems of low film edge forming quality and uneven edge pressing, and improves production efficiency.
[0014] Moreover, this utility model adjusts the position of the edge inserter on the crossbar by using a linear guide rail structure composed of a slide rail and a slider, and adjusts the distance between the two edge inserters by a linear bearing structure composed of a linear bearing and a guide shaft, replacing the traditional lead screw structure. This makes the operation of the edge inserter simpler and easier, and greatly reduces the difficulty of adjusting the edge inserter. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the specific structure of the present utility model;
[0016] Figure 2 This is a side view of the present invention;
[0017] Figure 3 This is a schematic diagram of the specific structure of the herringbone panel opening and closing adjustment component described in this utility model;
[0018] Figure 4 This is a schematic diagram of the specific structure of the edge-adjusting assembly described in this utility model.
[0019] The components are: 1. Traction frame, 2. Herringbone plate, 3. Edge inserter, 4. Traction plate, 5. Moving groove, 6. Herringbone plate support rod, 7. Limiting rod, 8. Lifting screw mounting plate, 9. Lifting screw, 10. Lifting screw nut, 11. Lifting connecting plate, 12. Crossbar, 13. Slide rail, 14. Slider, 15. Slider connecting plate, 16. Linear bearing, 17. Guide shaft. Detailed Implementation
[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0021] An adjusting mechanism for the edge inserter of a blown film machine, such as Figures 1 to 4 As shown, the system includes a traction frame 1, with traction plates 4 on the left and right sides of the traction frame 1. Two symmetrically arranged herringbone plates 2 are installed inside the traction frame 1. The top of the herringbone plates 2 is hinged to the herringbone plate support rod 6 that passes between the two traction plates 4. Two oppositely arranged inserters 5 are installed in the middle of the herringbone plates 2. Herringbone plate opening and closing adjustment components for adjusting the opening and closing degree of the herringbone plates are installed on the left and right sides of the lower part of the traction frame 1. Two spaced crossbars 12 are installed on the left and right sides of the traction frame 1. Inserter adjustment components for adjusting the position of the inserters are installed on the crossbars 12.
[0022] The herringbone plate opening and closing adjustment assembly includes a lifting screw 9 and a lifting screw seat 10. The lifting screw 9 is mounted on a lifting screw mounting plate 8 on the bottom support rod of the traction frame 1. The lifting screw seat 10 has an internal thread that is threaded to the lifting screw 9. Symmetrical hinge seats are provided on the outside of the lifting screw seat 10. The hinge seats are respectively hinged to the lifting connecting plate 11. The other end of the lifting connecting plate 11 is hinged to the lower part of the herringbone plate 2 on the corresponding side.
[0023] By manually adjusting the lifting screw 9, the lifting screw seat 10 is moved up and down. Under the connection of the lifting connecting plate 11, the lower part of the herringbone plate is controlled to rotate relative to each other to achieve opening and closing.
[0024] The edge inserter adjustment assembly includes a slide rail 13 mounted on a crossbar 12. The slide rail 13 is slidably connected to a slider 14. A slider connecting plate 15 is mounted on the top of the slider 14 and is connected to the edge inserter 3. By adjusting the position of the slider 14 on the slide rail 13, the edge inserter 2 can move back and forth along the slide rail 13, making the adjustment operation of the edge inserter simpler and reducing the precision of the edge inserter position adjustment. This allows for better physical guidance of the generated film bubble, ensuring the stability of the film bubble forming and cooling process and improving production efficiency.
[0025] The slider connecting plate 15 is provided with limiting plates at both ends to limit the movement of the slider. When the limiting plate contacts the end face of the slide rail, it indicates that the slider connecting plate moves to the limit position with the slider.
[0026] A linear bearing 16 is provided on the slider connecting plate 15. The linear bearing 16 is slidably connected to the edge inserter 3 through the guide shaft 17. Specifically, one end of the guide shaft 17 is connected to the edge inserter 3, and the other end of the guide shaft 17 passes through the linear bearing 16 and is slidably connected to the linear bearing 16. The distance between the two edge inserters 3 can be adjusted by moving the guide shaft 17.
[0027] In this embodiment, a linear bearing 16 is provided at the center of the slider connecting plate 15 on the upper crossbar 12, and there is also one corresponding guide shaft 17; two symmetrically arranged linear bearings 16 are provided on the slider connecting plate 15 on the lower crossbar 12, and there are also two corresponding guide shafts.
[0028] The position of the edge inserter on the crossbar is adjusted by using a linear guide structure consisting of a slide rail and a slider. The distance between the two edge inserters is adjusted by a linear bearing structure consisting of a linear bearing and a guide shaft, replacing the traditional lead screw structure. This makes the operation of the edge inserter simpler and easier, and greatly reduces the difficulty of adjusting the edge inserter.
[0029] The traction plate 4 has a front-to-back moving groove 5, and the herringbone plate support rod 6 is slidably disposed in the moving groove 5 to adjust the gap between the tops of the two herringbone plates 2 to accommodate membrane fabrics of different thicknesses. The herringbone plate support rod 6 is locked to the traction plate 4 by a locking nut.
[0030] In use, first, adjust the spacing between the inserters and the top spacing of the two herringbone plates according to the size and thickness of the film. Then, rotate the lifting screw to adjust the opening angle of the two herringbone plates, and guide the film bubble upward through the gap at the top of the herringbone plates. During the guiding process, the inserters will fold the film inward on both sides to ensure that the film can be pressed through the gap at the top of the herringbone plates. If the position of the folded edge of the film is offset, adjust the position of the inserters in time to ensure stable guidance of the folded edge of the film.
[0031] This utility model provides an edge inserter adjustment mechanism for a blown film machine. By setting a herringbone plate opening and closing component between two herringbone plates, and ensuring that the two herringbone plates maintain the same opening and closing angle under the limit of the lifting connecting plate, it ensures that the force on both sides is uniform and the extrusion is flat during the film bubble extrusion process. By setting an edge inserter adjustment component arranged vertically and horizontally in the middle of the traction frame and connecting it to the edge inserter, it ensures that the edge inserter always remains in a vertical state during the movement and will not deviate. This allows for smooth guidance of the film when it passes through the edge inserter, ensuring the stability of the film bubble folding process. This solves the problems of low film edge forming quality and uneven edge pressing, and improves production efficiency.
Claims
1. A film blowing machine edge inserter adjustment mechanism, characterized in that: The traction frame (1) includes a traction plate (4) on the left and right sides respectively; two symmetrically arranged herringbone plates (2) are installed inside the traction frame (1), and the top of the herringbone plate (2) is hinged to the herringbone plate support rod (6) passing between the two traction plates (4); herringbone plate opening and closing adjustment components for adjusting the opening and closing degree of the herringbone plate are installed on the left and right sides of the lower part of the traction frame (1); two oppositely arranged inserters (3) are installed in the middle of the herringbone plate (2); two spaced crossbars (12) are installed on the left and right sides of the traction frame (1), and inserter adjustment components for adjusting the position of the inserters are installed on the crossbars (12).
2. The film blowing machine edge inserter adjustment mechanism according to claim 1, characterized in that: The herringbone plate opening and closing adjustment assembly includes a lifting screw (9) and a lifting screw seat (10). The lifting screw (9) is installed on the lifting screw mounting plate (8) on the bottom support rod of the traction frame (1). The lifting screw seat (10) has an internal thread that is threaded to the lifting screw (9). The lifting screw seat (10) has symmetrical hinge seats on its outer side. The hinge seats are respectively hinged to the lifting connecting plate (11). The other end of the lifting connecting plate (11) is hinged to the lower part of the herringbone plate (2) on the corresponding side.
3. The film blowing machine edge inserter adjustment mechanism according to claim 1, characterized in that: The edge inserter adjustment assembly includes a slide rail (13) mounted on a crossbar (12), the slide rail (13) being slidably connected to a slider (14), a slider connecting plate (15) being mounted on the top of the slider (14), and the slider connecting plate (15) being connected to the edge inserter (3).
4. The film blowing machine edge inserter adjustment mechanism according to claim 3, characterized in that: A linear bearing (16) is provided on the slider connecting plate (15). The linear bearing (16) is slidably connected to the guide shaft (17). One end of the guide shaft (17) is connected to the inserter (3).
5. The film blowing machine edge inserter adjustment mechanism according to claim 1, characterized in that: The traction plate (4) has a front-to-back moving groove (5), and the herringbone plate support rod (6) is slidably disposed in the moving groove (5). The herringbone plate support rod (6) is locked to the traction plate (4) by a locking nut.