A film feeding mechanism of a plastic packaging machine
By introducing a tensioning mechanism into the film supply mechanism of the sealing machine, the problem of wrinkles caused by film relaxation during use is solved, and stable film delivery and convenient replacement are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU DAILY PRESS GRP SHENGYUAN PRINTING CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-06-16
AI Technical Summary
In existing plastic sealing machines, the film supply mechanism causes the film to thin and loosen during the use of the packaging film roll, increasing the probability of wrinkles during film transport.
The design includes a mounting bracket, support rollers, a guide plate, and a tensioning mechanism. The tensioning rollers and springs work together to keep the film taut, prevent wrinkles, and facilitate film roll replacement.
It effectively avoids wrinkles during film transport, ensures continuous and stable film transport, and facilitates the replacement of packaging film rolls.
Smart Images
Figure CN224361485U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laminating machine technology, and in particular to a film supply mechanism for a laminating machine. Background Technology
[0002] A laminating machine uses a polyester film coated with hot melt adhesive to bond items inside the plastic film under certain pressure and high temperature. With the development of science and technology and the continuous progress of laminating technology, laminating equipment has been continuously developed and improved.
[0003] Because laminators can perform large-scale batch lamination operations, they require a dedicated film supply mechanism to supply film to ensure continuous lamination operations over long periods.
[0004] In an existing film supply mechanism for a sealing machine, the original thickness of the packaging film roll decreases as it is used continuously. This causes the packaging film, which was originally taut inside the supply mechanism, to become loose, increasing the probability of wrinkles during film transport. This paper proposes a new film supply mechanism for a sealing machine to address the aforementioned shortcomings of the existing technology. Utility Model Content
[0005] Purpose of the utility model: The purpose of this utility model is to provide a film supply mechanism for a plastic sealing machine to solve the above-mentioned shortcomings in the prior art.
[0006] Technical solution: A film supply mechanism for a sealing machine includes a mounting frame, on which two support rollers are fixedly mounted, and on the side of the mounting frame away from the support rollers, two guide plates are fixedly mounted, and a tensioning mechanism is provided between the guide plates and the support rollers.
[0007] As a further description of the above technical solution: the guide plate is configured as an isosceles right triangle.
[0008] As a further description of the above technical solution: the tensioning mechanism includes two tensioning rollers, which are slidably disposed on the mounting frame. Two sliders are rotatably mounted at both ends of the two tensioning rollers. Four sliders are slidably mounted on the mounting frame. A sliding rod is slidably connected to each slider. The sliding rod is fixedly mounted on the mounting frame. A first spring is sleeved on the sliding rod. One end of the first spring is fixedly connected to the slider, and the other end of the first spring is fixedly connected to the mounting frame.
[0009] As a further description of the above technical solution: a drive ring is rotatably mounted on the side wall of the mounting bracket, the drive ring has a drive groove, a connecting column is fixedly mounted on the side of the slider near the drive ring, the connecting column is slidably disposed inside the drive groove, and a fixing mechanism is provided between the drive ring and the mounting bracket.
[0010] As a further description of the above technical solution: the fixing mechanism includes a locking block, which is slidably mounted on the side wall of the mounting frame, engages with the drive ring, and a second spring is fixedly connected between the locking block and the mounting frame.
[0011] As a further description of the above technical solution: a connecting frame is slidably installed on the side wall of the mounting bracket, and wedge blocks are fixedly installed at both ends of the connecting frame. A toggle block is fixedly connected to the side of the locking block away from the drive ring, and the wedge block is adapted to the toggle block.
[0012] As a further description of the above technical solution: a buckle is fixedly installed on the side wall of the mounting bracket, and the buckle is adapted to the connecting bracket.
[0013] As a further description of the above technical solution: the two sides of the card block are set as slopes.
[0014] Beneficial effects: This device places the packaging film roll on the support roller. After passing through the tensioning mechanism on the support roller, the packaging film is conveyed to the guide plate and then transported out. The packaging film is wound at the tensioning mechanism. As the packaging film roll is used continuously, its original thickness gradually decreases, making the packaging film looser and increasing the probability of wrinkles during film transport. When the tensioning mechanism detects the looseness, it will support the film to ensure that the film is taut and prevent wrinkles. The support roller can be disassembled, making it easy to replace the packaging film roll. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of a film supply mechanism for a plastic sealer proposed in this utility model;
[0016] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;
[0017] Figure 3 This is a three-dimensional structural schematic diagram of the present invention from another perspective;
[0018] Figure 4 This is a side view of the structure of this utility model;
[0019] Figure 5 This is a three-dimensional structural diagram of the side wall of the mounting bracket of this utility model;
[0020] Figure 6 This is a three-dimensional structural schematic diagram of the side wall of the mounting bracket of this utility model from another perspective;
[0021] Figure 7 This is a three-dimensional exploded structural diagram of the drive ring, connecting frame, and slider of this utility model;
[0022] Figure 8 This is a three-dimensional exploded view of the drive ring, connecting frame, and slider of this utility model from another perspective.
[0023] Legend:
[0024] 1. Mounting bracket; 2. Support roller; 3. Guide plate; 4. Tensioning roller; 5. Slider; 6. Slide rod; 7. First spring; 8. Drive ring; 9. Drive groove; 10. Connecting column; 11. Locking block; 12. Second spring; 13. Connecting bracket; 14. Wedge block; 15. Actuating block; 16. Buckle. Detailed Implementation
[0025] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] Reference Figure 1-8 A film supply mechanism for a sealing machine includes a mounting frame 1. Two support rollers 2 are fixedly mounted on the mounting frame 1. Two guide plates 3 are fixedly mounted on the side of the mounting frame 1 away from the support rollers 2. A tensioning mechanism is provided between the guide plates 3 and the support rollers 2. In this device, a packaging film roll is placed on the support rollers 2. The packaging film passes through the tensioning mechanism on the support rollers 2 and is then conveyed to the guide plates 3. The packaging film is wound at the tensioning mechanism. As the packaging film roll is used continuously, its original thickness gradually decreases, causing the packaging film to become loose and increasing the probability of wrinkles during film conveying. When the tensioning mechanism detects the looseness, it supports the film to ensure tension and prevent wrinkles. The support rollers 2 are detachable for easy replacement of the packaging film roll.
[0027] As a preferred technical solution in this embodiment, the guide plate 3 is set as an isosceles right triangle; the packaging film is transported from one side of the guide plate 3 through the long hypotenuse of the guide plate 3 to the other side of the guide plate 3, thereby realizing the change of direction of the packaging film in one go.
[0028] As a preferred embodiment, the tensioning mechanism includes two tensioning rollers 4, which are slidably mounted on the mounting frame 1. Two sliders 5 are rotatably mounted at both ends of the two tensioning rollers 4, and four sliders 5 are slidably mounted on the mounting frame 1. A sliding rod 6 is slidably connected to each slider 5, and the sliding rod 6 is fixedly mounted on the mounting frame 1. A first spring 7 is sleeved on the sliding rod 6, with one end of the first spring 7 fixedly connected to the slider 5 and the other end of the first spring 7 fixedly connected to the mounting frame 1. When the device is in use, the packaging film is led out by the support roller 2 and wound around the two tensioning rollers 4. As the film is continuously consumed, when the film on the mounting frame 1 shows signs of loosening, the first spring 7 pulls the sliders 5, causing the two tensioning rollers 4 to move in opposite directions, thus keeping the film taut.
[0029] As a preferred technical solution in this embodiment, a drive ring 8 is rotatably mounted on the side wall of the mounting frame 1. The drive ring 8 has a drive groove 9. A connecting post 10 is fixedly mounted on the side of the slider 5 near the drive ring 8. The connecting post 10 is slidably disposed inside the drive groove 9. A fixing mechanism is provided between the drive ring 8 and the mounting frame 1. When the packaging film roll is replaced on the mounting frame 1, the tensioning mechanism needs to be restored to its initial state. Therefore, by rotating the drive ring 8, the drive ring moves, so that the two sliders 5 follow the movement of the drive ring 8. The drive groove 9 makes the movement trajectory between the drive ring 8 and the sliders 5 compatible. The two sliders 5 connected on the same drive ring 8 belong to two different tensioning rollers 4. After the two tensioning rollers 4 return to their original positions, the drive ring 8 is fixed by the fixing mechanism, which facilitates the replacement of the packaging film roll.
[0030] As a preferred embodiment, the fixing mechanism includes a locking block 11, which is slidably mounted on the side wall of the mounting frame 1. The locking block 11 engages with the drive ring 8, and a second spring 12 is fixedly connected between the locking block 11 and the mounting frame 1. When the drive ring 8 needs to be fixed, the second spring 12 supports the locking block 11, causing the locking block 11 to extend out of the side wall of the mounting frame 1 and engage with the drive ring 8, thereby fixing the drive ring 8.
[0031] As a preferred technical solution of this embodiment, a connecting frame 13 is slidably installed on the side wall of the mounting frame 1, and wedge blocks 14 are fixedly installed at both ends of the connecting frame 13. The side of the locking block 11 away from the driving ring 8 is fixedly connected to the actuating block 15, and the wedge block 14 is adapted to the actuating block 15. After the new packaging film roll is replaced, it is necessary to release the lock on the driving ring 8 so that the tension applied by the first spring 7 on the tension roller 4 is manifested. Therefore, by pushing the connecting frame 13, the wedge block 14 passes between the side wall of the mounting frame 1 and the actuating block 15, so that the locking block 11 is retracted into the mounting frame 1, and the lock on the driving ring 8 is released.
[0032] As a preferred technical solution in this embodiment, a buckle 16 is fixedly installed on the side wall of the mounting bracket 1, and the buckle 16 is adapted to the connecting bracket 13; the metal buckle 16 is supported by an elastic metal material, which facilitates the connecting bracket 13 to enter or exit the buckle 16.
[0033] As a preferred technical solution of this embodiment, the two sides of the locking block 11 are set as slopes; the two sides of the locking block 11 are set as slopes, so when the driving ring 8 rotates to the fixed position, it is easy to compress the locking block 11 into the mounting bracket 1, and it is easy for the driving ring 8 to rotate to the fixed position.
[0034] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A film supply mechanism for a laminator, comprising a mounting frame (1), characterized in that, Two support rollers (2) are fixedly installed on the mounting frame (1). Two guide plates (3) are fixedly installed on the side of the mounting frame (1) away from the support rollers (2). A tensioning mechanism is provided between the guide plates (3) and the support rollers (2).
2. The film supply mechanism for a laminator according to claim 1, characterized in that, The guide plate (3) is set as an isosceles right triangle.
3. The film supply mechanism for a laminator according to claim 2, characterized in that, The tensioning mechanism includes two tensioning rollers (4), which are slidably mounted on the mounting frame (1). Two sliders (5) are rotatably mounted on both ends of the two tensioning rollers (4). The four sliders (5) are slidably mounted on the mounting frame (1). A slide rod (6) is slidably connected to each slider (5). The slide rod (6) is fixedly mounted on the mounting frame (1). A first spring (7) is sleeved on the slide rod (6). One end of the first spring (7) is fixedly connected to the slider (5), and the other end of the first spring (7) is fixedly connected to the mounting frame (1).
4. The film supply mechanism for a laminator according to claim 3, characterized in that, A drive ring (8) is rotatably mounted on the side wall of the mounting bracket (1). A drive groove (9) is provided on the drive ring (8). A connecting column (10) is fixedly mounted on the side of the slider (5) near the drive ring (8). The connecting column (10) is slidably disposed inside the drive groove (9). A fixing mechanism is provided between the drive ring (8) and the mounting bracket (1).
5. The film supply mechanism for a laminator according to claim 4, characterized in that, The fixing mechanism includes a locking block (11), which is slidably mounted on the side wall of the mounting frame (1). The locking block (11) engages with the drive ring (8), and a second spring (12) is fixedly connected between the locking block (11) and the mounting frame (1).
6. The film supply mechanism for a laminator according to claim 5, characterized in that, A connecting frame (13) is slidably installed on the side wall of the mounting bracket (1). Wedge blocks (14) are fixedly installed at both ends of the connecting frame (13). A toggle block (15) is fixedly connected to the side of the locking block (11) away from the driving ring (8). The wedge block (14) is adapted to the toggle block (15).
7. The film supply mechanism for a laminator according to claim 6, characterized in that, A buckle (16) is fixedly installed on the side wall of the mounting bracket (1), and the buckle (16) is adapted to the connecting bracket (13).
8. The film supply mechanism for a laminator according to claim 5, characterized in that, The two sides of the card block (11) are set as slopes.