Roll changing device of film blowing machine
By designing an automated blown film machine roll changing device, convenient replacement of the take-up roll and adjustment of film tension are realized, solving the problems of complex manual operation and non-adjustable tension in existing devices, thus improving production efficiency and film quality.
Patent Information
- Application Number
- CN202422962999.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing blown film machine roll changing devices require multiple operators, resulting in high labor intensity, long downtime, and difficulty in adjusting film winding tension, which affects production efficiency and quality.
A roll changing device was designed, comprising a fixed frame, a rotating seat, a toothed block, a cylinder, a connecting rod, and a pressure roller. The device enables the replacement of the take-up roller and the adjustment of tension through automated operation, reducing manual intervention.
It improves roll changing efficiency, reduces labor intensity, shortens downtime, and improves film production quality through automatic tension adjustment.
Smart Images
Figure CN223547398U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blown film machine technology, specifically a roll changing device for a blown film machine. Background Technology
[0002] The roll changing device is an important component of the blown film machine. Its purpose is to achieve continuous film production and efficient roll changing, thereby improving production efficiency, ensuring film quality, reducing production costs, and enhancing equipment stability.
[0003] In existing blown film machines, when the roll changing device is fully wound, a worker needs to crank the roll changing handle to remove the roll. This process requires the cooperation of multiple workers, resulting in high labor intensity and long downtime for roll changing, which reduces production efficiency. Furthermore, maintaining appropriate tension is crucial during film winding. Excessive tension can cause the film to wrinkle or break, while insufficient tension can result in the film being wound too loosely. However, the device usually cannot adjust the tension, which reduces the quality of the produced film. Utility Model Content
[0004] The purpose of this invention is to provide a roll changing device for a blown film machine to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a roll changing device for a blown film machine, comprising a fixed frame, a connecting frame fixedly connected to the top of the fixed frame, and an unwinding assembly disposed on the inner side of the fixed frame, and further comprising:
[0006] Two rotating seats are arranged at the bottom inner side of the fixed frame. The inner sides of the two rotating seats are respectively rotatably connected to a first tooth block and a second tooth block. The inner sides of the first tooth block and the second tooth block are each provided with a rotating component. The inner sides of the two rotating seats are each provided with a swing component. A lifting plate is provided on the outer side of the rotating component. A support plate is provided on the outer side of the swing component. A first roller frame and a second roller frame are provided on the top of the support plate. A connecting component is provided on the inner side of the first roller frame and the second roller frame. A take-up roller is provided on the outer side of the connecting component.
[0007] A second cylinder is located at the top of the connecting frame. The piston rod of the second cylinder is equipped with a transmission component. A moving component is located on the outside of the transmission component. Another set of identical transmission components is symmetrically arranged below the moving component. A pressure roller for adjusting the film winding tension is located on the outside of the symmetrically arranged transmission components. A sliding component for improving the movement stability is located on the outside of the pressure roller.
[0008] Preferably, the rotating assembly includes a first connecting rod fixed to the outer side of the first tooth block and the second tooth block respectively, the other end of the first connecting rod being rotatably connected to a second connecting rod, and a first cylinder being disposed on the outer side of the first connecting rod.
[0009] Preferably, the swing assembly includes a connecting shaft disposed inside the rotating seat, and a swing rod is fixedly connected to the outside of the connecting shaft.
[0010] Preferably, the connecting assembly includes a first rotating shaft disposed inside the first roller frame, a second rotating shaft disposed inside the second roller frame, a locking block disposed at one end of the first rotating shaft, and a locking groove disposed at one end of the second rotating shaft.
[0011] Preferably, the transmission assembly includes a connecting seat fixed to the piston rod of the second cylinder, and a rotating rod is rotatably connected to the inner side of the connecting seat.
[0012] Preferably, the moving component includes a movable seat disposed at one end of the rotating rod, and a guide rod is slidably connected to the inner side of the movable seat.
[0013] Preferably, the sliding assembly includes a slider disposed on the outside of the pressure roller, and the inner side of the connecting frame is provided with a sliding groove.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] This invention utilizes two support plates that move to both sides, causing the first and second roller frames to separate from the first and second rotating shafts. This allows the take-up roller to detach from the outside of the connecting assembly. Simultaneously, two first connecting rods drive the connected second connecting rods to rotate to both sides. As the second connecting rods rotate, they enter a vertically unfolded state, causing the lifting plate to move upwards and reach the middle of the two support plates. This catches the take-up roller that has detached from the outside of the connecting assembly, completing the roll change operation and improving production efficiency. Furthermore, the connecting seat drives one end of the rotating rod to move, while the other end of the rotating rod, as its position changes, drives the moving seat to slide inwards. This movement causes the symmetrically arranged transmission components to move downwards with the pressure rollers, pressing the film during winding and improving the film production quality. Attached Figure Description
[0016] Figure 1 A schematic diagram of a preferred embodiment of the roll changing device for a blown film machine provided by this utility model;
[0017] Figure 2 A schematic diagram of the side structure of the fixing frame provided by this utility model;
[0018] Figure 3 A schematic diagram of the rotating component structure provided by this utility model;
[0019] Figure 4 A schematic diagram of the connection component structure provided by this utility model;
[0020] Figure 5 A schematic diagram of the transmission component structure provided by this utility model.
[0021] In the diagram: 1. Fixed frame; 2. Connecting frame; 3. Unwinding assembly; 4. Rotating seat; 5. First toothed block; 6. Second toothed block; 7. Rotating assembly; 71. First connecting rod; 72. Second connecting rod; 73. First cylinder; 8. Swing assembly; 81. Connecting shaft; 82. Swing rod; 9. Support plate; 10. Lifting plate; 11. First roller frame; 12. Second roller frame; 13. Connecting assembly; 131. First rotating shaft; 132. Second rotating shaft; 133. Locking block; 134. Locking groove; 14. Rewinding roller; 15. Second cylinder; 16. Transmission assembly; 161. Connecting seat; 162. Rotating rod; 17. Moving assembly; 171. Moving seat; 172. Guide rod; 18. Pressure roller; 19. Sliding assembly; 191. Slider; 192. Slide groove. Detailed Implementation
[0022] 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 protection scope of the present utility model.
[0023] Please see Figure 1-5As shown, a film blowing machine's roll changing device includes a fixed frame 1, a connecting frame 2 fixedly connected to the top of the fixed frame 1, and an unwinding assembly 3 arranged inside the fixed frame 1. The unwinding assembly 3, composed of a motor and an unwinding roller, is used to unwind the film. It also includes two rotating seats 4 arranged at the bottom inside the fixed frame 1. A first toothed block 5 and a second toothed block 6 are rotatably connected to the inner sides of the two rotating seats 4, respectively. The first toothed block 5 meshes with the second toothed block 6. Simultaneously, when the piston rod of the first cylinder 73 moves... The first toothed block 5 and the second toothed block 6 are driven to rotate by two first connecting rods 71 respectively. Rotating components 7 are provided on the inner sides of both the first toothed block 5 and the second toothed block 6, and swinging components 8 are provided on the inner sides of both rotating seats 4. A lifting plate 10 is provided on the outer side of the rotating components 7. By setting the lifting plate 10, when the two support plates 9 move to the sides, the first roller frame 11 and the second roller frame 12 simultaneously drive the first rotating shaft 131 and the second rotating shaft 132 to separate, causing the take-up roller 14 to detach from the outer side of the connecting component 13 and fall onto the top of the lifting plate 10. The section completes the roll changing operation; a support plate 9 is provided on the outer side of the swing assembly 8, which can drive the first roller frame 11 and the second roller frame 12 to move; the first roller frame 11 and the second roller frame 12 are provided on the top of the support plate 9, which can limit the connection assembly 13; the connection assembly 13 is provided on the inner side of the first roller frame 11 and the second roller frame 12, and the take-up roller 14 is provided on the outer side of the connection assembly 13; the second cylinder 15 is provided on the top of the connection frame 2, which can limit the connection assembly 13 to move. The second cylinder 15 has a piston rod that extends to drive the connecting seat 161 to move up and down. The piston rod of the second cylinder 15 is equipped with a transmission assembly 16. A moving assembly 17 is provided on the outside of the transmission assembly 16. Another set of identical transmission assemblies 16 is symmetrically arranged below the moving assembly 17. A pressure roller 18 for adjusting the film winding tension is provided on the outside of the symmetrically arranged transmission assemblies 16. By setting the pressure roller 18, it is convenient to adjust the surface tension of the film during winding. A sliding assembly 19 for improving the movement stability is provided on the outside of the pressure roller 18.
[0024] The rotating assembly 7 includes first connecting rods 71 fixed to the outer sides of the first toothed block 5 and the second toothed block 6 respectively. By setting the first connecting rods 71, the outer sides of the two first connecting rods 71 are rotatably connected to both ends of the first cylinder 73, enabling the second connecting rod 72 to rotate as the piston rod of the first cylinder 73 moves. The other end of the first connecting rod 71 is rotatably connected to the second connecting rod 72. By setting the second connecting rod 72, as the first connecting rod 71 rotates inward, the second connecting rod 72 changes from an unfolded state to a folded state, causing the lifting plate 10 to move downward. The outer side of the first connecting rod 71 is provided with the first cylinder 73. The swing assembly 8 includes a connecting shaft 81 disposed inside the rotating seat 4. By setting the connecting shaft 81, it is fixed to the inner side of the first toothed block 5 and the second toothed block 6. A swing rod 8 is fixedly connected to the outer side of the connecting shaft 81. 2. By setting the swing arm 82, while rotating with the connecting shaft 81, the two support plates 9 are driven to close or separate as the rotation angle changes; the connecting assembly 13 includes a first rotating shaft 131 set inside the first roller frame 11. By setting the first rotating shaft 131, it is easy to connect with the second rotating shaft 132 to drive the take-up roller 14 to rotate; the second rotating shaft 132 is set inside the second roller frame 12. By setting the second rotating shaft 132, the first rotating shaft 131 can be driven to rotate together by the motor set at one end of the second rotating shaft 132; a locking block 133 is set at one end of the first rotating shaft 131, and a locking groove 134 is opened at one end of the second rotating shaft 132. By setting the locking block 133 and the locking groove 134, the first rotating shaft 131 and the second rotating shaft 132 can be quickly connected and disassembled, improving the convenience of replacing the take-up roller 14.
[0025] The transmission assembly 16 includes a connecting seat 161 fixed to the piston rod of the second cylinder 15. By providing the connecting seat 161, when the piston rod of the second cylinder 15 moves, it can drive one end of the rotating rod 162 to move up and down. The rotating rod 162 is rotatably connected to the inner side of the connecting seat 161. By providing the rotating rod 162, when one end moves with the connecting seat 161, the other end drives the movable seat 171 to move. The moving assembly 17 includes a movable seat 171 disposed at one end of the rotating rod 162. By providing the movable seat 171, when it moves, it drives the... The rotating rod 162 is rotated; a guide rod 172 is slidably connected to the inner side of the movable seat 171. By setting the guide rod 172, the stability of the movable seat 171 when sliding laterally is improved; the sliding assembly 19 includes a slider 191 set on the outside of the pressure roller 18, and a groove 192 is opened on the inner side of the connecting frame 2. By setting the sliding assembly 19, when the pressure roller 18 moves, it drives the slider 191 to slide along the inner side of the groove 192. The groove 192 guides the movement path of the pressure roller 18, thereby improving the stability of the movement of the pressure roller 18.
[0026] Working principle: During use, when the take-up roller 14 needs to be replaced, the piston rod of the first cylinder 73 extends, driving the first tooth block 5 and the second tooth block 6 to rotate via the first connecting rod 71. Simultaneously, the connecting shaft 81 drives the swing rod 82 to rotate. As the rotation angle changes, the two support plates 9 move to both sides. At the same time, the first roller frame 11 and the second roller frame 12 cause the first rotating shaft 131 and the second rotating shaft 132 to separate, disengaging the take-up roller 14 from the outside of the connecting assembly 13. Simultaneously, the two first connecting rods 71 drive the connected second connecting rod 72 to rotate to both sides. As the rod 72 rotates, it enters a vertically extended state, causing the lifting plate 10 to move upward and reach the middle of the two support plates 9. It then catches the take-up roller 14, which has detached from the outside of the connecting assembly 13, thus completing the roll change operation. When it is necessary to adjust the film winding tension, the piston rod of the second cylinder 15 extends and drives one end of the rotating rod 162 to move through the connecting seat 161. At the same time, as the position of the other end of the rotating rod 162 changes, it drives the moving seat 171 to slide inward. This movement causes the symmetrically arranged transmission assembly 16 to move the pressure roller 18 downward, pressing the film during winding, thereby completing the tension adjustment.
[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A roll changing device for a blown film machine, comprising a fixed frame (1), a connecting frame (2) fixedly connected to the top of the fixed frame (1), and an unwinding assembly (3) provided on the inner side of the fixed frame (1), characterized in that, Also includes: Two rotating seats (4) are set at the bottom of the inner side of the fixed frame (1). The inner sides of the two rotating seats (4) are respectively rotatably connected to a first tooth block (5) and a second tooth block (6). The inner sides of the first tooth block (5) and the second tooth block (6) are each provided with a rotating component (7). The inner sides of the two rotating seats (4) are each provided with a swing component (8). The outer side of the rotating component (7) is provided with a lifting plate (10). The outer side of the swing component (8) is provided with a support plate (9). The top of the support plate (9) is provided with a first roller frame (11) and a second roller frame (12). The inner sides of the first roller frame (11) and the second roller frame (12) are provided with a connecting component (13). The outer side of the connecting component (13) is provided with a take-up roller (14). A second cylinder (15) is provided on the top of the connecting frame (2). The piston rod of the second cylinder (15) is provided with a transmission assembly (16). A moving assembly (17) is provided on the outside of the transmission assembly (16). Another set of the same transmission assembly (16) is symmetrically arranged below the moving assembly (17). A pressure roller (18) for adjusting the film winding tension is provided on the outside of the symmetrically arranged transmission assembly (16). A sliding assembly (19) for improving its movement stability is provided on the outside of the pressure roller (18).
2. The film blowing machine roll changing device according to claim 1, characterized in that: The rotating assembly (7) includes a first connecting rod (71) fixed to the outside of the first tooth block (5) and the second tooth block (6), respectively. The other end of the first connecting rod (71) is rotatably connected to a second connecting rod (72), and a first cylinder (73) is provided on the outside of the first connecting rod (71).
3. The film blowing machine roll changing device according to claim 1, characterized in that: The swing assembly (8) includes a connecting shaft (81) disposed inside the rotating seat (4), and a swing rod (82) is fixedly connected to the outside of the connecting shaft (81).
4. The film blowing machine roll changing device according to claim 1, characterized in that: The connecting assembly (13) includes a first rotating shaft (131) disposed inside the first roller frame (11), a second rotating shaft (132) disposed inside the second roller frame (12), a locking block (133) disposed at one end of the first rotating shaft (131), and a locking groove (134) opened at one end of the second rotating shaft (132).
5. The film blowing machine roll changing device according to claim 1, characterized in that: The transmission assembly (16) includes a connecting seat (161) fixed to the piston rod of the second cylinder (15), and a rotating rod (162) is rotatably connected to the inner side of the connecting seat (161).
6. The film blowing machine roll changing device according to claim 5, characterized in that: The moving component (17) includes a moving seat (171) disposed at one end of the rotating rod (162), and a guide rod (172) is slidably connected to the inner side of the moving seat (171).
7. The film blowing machine roll changing device according to claim 1, characterized in that: The sliding assembly (19) includes a slider (191) disposed on the outside of the pressure roller (18), and a groove (192) is provided on the inner side of the connecting frame (2).