A protective film drawing and cutting device

Abstract

The application relates to the field of protective films, in particular to a protective film traction cutting device. In view of the fact that the prior art cannot realize automatic integrated processing, cannot accurately control the cutting specification and is prone to damaging the protective film, the following scheme is provided. The device comprises a first box body, one side of the first box body is fixedly connected with a support frame, one side of the support frame is fixedly connected with a second box body, the bottom inner wall of the first box body is fixedly connected with a first motor, the output shaft of the first motor is fixedly connected with a first transmission shaft, and the device further comprises a moving assembly arranged on the first transmission shaft and an adjusting assembly arranged on the second box body. Further, the moving assembly comprises a first gear which is fixedly connected with one end of the first transmission shaft. The application can realize automatic, high-precision and low-damage protective film traction cutting operation through the cooperation of multiple assemblies, and improves product processing quality and production efficiency.

Description

Technical Field

[0001] This application relates to the field of protective films, and in particular to a protective film traction cutting device. Background Technology

[0002] In the processing and production of plastic film, to protect the finished film rolls from damage during transportation, a protective film, such as bubble wrap, is usually wrapped around their outer surface. Currently, this is mainly done manually by cutting a section of protective film and then wrapping the finished film roll. Due to the large production volume and the significant variations in the diameter and width of the rolls, manually cutting the protective film is time-consuming, labor-intensive, and inefficient.

[0003] Patent document CN211541332U discloses a protective film traction and cutting device, including a first frame, a second frame, a transition traction device, a tension holding device, and a cutting device arranged sequentially from back to front on the first frame, and an active traction device disposed between the first and second frames. The transition traction device is used to create traction tension on the protective film; the active traction device is used to pull the protective film forward; the tension holding device is used to press the protective film to maintain the traction tension on the transition traction device before cutting; and the cutting device is used to cut the protective film. This protective film traction and cutting device can be applied to protective film rolls of different widths, automatically cutting the protective film rolls into packaging lengths of different sizes, allowing the protective film to be packaged according to different types of finished film rolls, improving the automation level of finished film roll packaging, reducing the labor intensity of workers, and improving packaging efficiency.

[0004] However, the aforementioned protective film traction cutting device has the disadvantages of not being able to achieve automated integrated processing, not being able to accurately control the cutting specifications, and being prone to damaging the protective film. Therefore, we propose a protective film traction cutting device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the inability to achieve automated integrated processing, the inability to accurately control cutting specifications, and the easy damage to the protective film, and to propose a protective film traction cutting device.

[0006] The protective film traction cutting device provided in this application adopts the following technical solution:

[0007] A protective film traction cutting device includes a first housing, a support frame fixedly connected to one side of the first housing, and a second housing fixedly connected to one side of the support frame. A first motor is fixedly connected to the bottom inner wall of the first housing, and a first transmission shaft is fixedly connected to the output shaft of the first motor. The device also includes:

[0008] The movable component is disposed on the first drive shaft;

[0009] An adjustment component is located in the second housing.

[0010] Furthermore, the moving component includes a first gear, which is fixedly connected to one end of a first transmission shaft. A first rack meshes on the first gear, and a connecting plate is fixedly connected to the top of the first rack.

[0011] By adopting the above technical solution, the rotational motion of the first motor is precisely converted into the horizontal linear motion of the first rack through the meshing transmission of the "first transmission shaft-first gear-first rack," thereby driving the top connecting plate to move stably. Compared with belt drives and other methods, gear and rack meshing transmission has the advantages of high transmission accuracy and no slippage, which can ensure the positional accuracy of the winding roller when it moves out of the feeding position or returns to the working position, and avoid misalignment of the protective film due to transmission offset.

[0012] Furthermore, two connecting blocks are fixedly connected to one side of the connecting plate, and a winding roller is provided on the inner side of the two connecting blocks.

[0013] By adopting the above technical solution, two connecting blocks are symmetrically fixed on one side of the connecting plate, forming a stable support for the take-up roller. The inner side of the connecting blocks can be movably connected to the take-up roller through bearings, allowing the take-up roller to rotate freely synchronously with the protective film during traction. This structural design facilitates quick assembly and disassembly of the take-up roller for feeding, while ensuring the smoothness of the take-up roller's rotation and preventing local stretching or wrinkling of the protective film during traction.

[0014] Furthermore, the inner wall of the support frame is provided with a slide rail, and a connecting rod is slidably connected to the inner wall of the other side of the support frame.

[0015] By adopting the above technical solution, the slide rail provides a clear sliding guide path for the connecting rod. One end of the connecting rod is fixed to the clamping plate, and the other end is connected to the second rack. Under the constraint of the slide rail, it can drive the clamping plate to move in a fixed direction. The slide rail effectively restricts the degree of freedom of movement of the clamping plate, avoids lateral displacement of the clamping plate when pulling the protective film, and ensures that the protective film always unfolds along the preset trajectory, laying the foundation for subsequent precise cutting.

[0016] Furthermore, one end of the connecting rod is fixedly connected to a clamping plate, and one side of the clamping plate cooperates with the slide rail. A hydraulic oil tank is provided on the support frame, and the output pipe of the hydraulic oil tank is connected to the clamping plate.

[0017] By adopting the above technical solution, the hydraulic oil tank provides a stable hydraulic driving force to the clamping plate through the output pipe. The clamping force can be adjusted according to the material hardness of the protective film—ensuring that the clamping plate can firmly clamp the end of the protective film to prevent slippage during traction, while also avoiding damage to the edge of the protective film due to excessive clamping force. At the same time, the cooperation between the clamping plate and the slide rail allows the clamping action and the traction action to be carried out in tandem, further improving the working stability of the device.

[0018] Furthermore, the adjustment assembly includes a second motor, which is fixedly connected to the bottom inner wall of the second housing, and a second rack is fixedly connected to one end of the connecting rod.

[0019] By adopting the above technical solution, the rotational motion of the second motor is transmitted to the connecting rod via the "second transmission shaft-second gear-second rack," driving the clamping plate to move at a constant speed along the slide rail, thereby achieving precise control over the unfolded length of the protective film. The meshing transmission of the gear and rack can precisely adjust the moving distance of the clamping plate by controlling the number of rotations of the second motor, meeting the cutting requirements of protective films of different lengths and specifications, and improving the applicability of the device.

[0020] Furthermore, the output shaft of the second motor is fixedly connected to a second transmission shaft, and a second gear is fixedly connected to the second transmission shaft.

[0021] By adopting the above technical solution, the push rod motor can drive the sliding rod to move smoothly in the horizontal direction. Multiple laser cutters on the sliding rod move synchronously and emit lasers, enabling multi-segment cutting or wide-width cutting of the protective film in one operation. Compared with traditional blade cutting, laser cutting has the advantages of smooth, burr-free cuts and high cutting efficiency. Furthermore, the spacing between multiple laser cutters can be flexibly adjusted according to cutting needs, further enhancing the cutting flexibility of the device.

[0022] Furthermore, the second gear meshes with the second rack, and a push rod motor is fixedly connected to one side of the support frame. The output shaft of the push rod motor is fixedly connected to a sliding rod, and multiple laser cutters are mounted on the sliding rod.

[0023] By adopting the above technical solution, a detachable protective cover is installed on the outside of the support frame, and a transparent, high-temperature resistant observation window is provided on the cover corresponding to the laser cutting area. The protective cover can effectively block the flying debris generated during laser cutting, prevent operators from coming into contact with the high-temperature cutting area, and improve the safety of the device; the transparent observation window allows operators to observe the cutting status of the protective film in real time, promptly detect and adjust cutting deviations, and balance safety and ease of operation.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. This solution can achieve integrated operation of protective film from automatic feeding, precise traction and unfolding to efficient cutting through the coordinated design of "gear and rack transmission + hydraulic clamping + laser cutting", which greatly reduces manual intervention, improves overall processing efficiency, and solves the problems of low efficiency and poor cutting accuracy of manual operation in the existing technology.

[0026] 2. This solution, through its slide rail guidance, precise gear and rack transmission, and adjustable hydraulic clamping force design, ensures that the protective film does not shift or tear during traction. Furthermore, the cutting length can be precisely adjusted by controlling the rotation of the motor to meet the processing needs of protective films of different specifications. This solves the shortcomings of existing technologies, such as the inability to adapt to the processing of multiple specifications of protective films and the tendency to scrap products. Attached Figure Description

[0027] Figure 1 This is a perspective view of a protective film traction and cutting device according to Embodiment 1 of this application;

[0028] Figure 2 This is a three-dimensional schematic diagram of the removal of the first box body by a protective film traction cutting device according to Embodiment 1 of this application;

[0029] Figure 3 This is a side perspective perspective view of a protective film traction and cutting device according to Embodiment 1 of this application.

[0030] Reference numerals in the attached drawings: 1. First housing; 2. Support frame; 3. Second housing; 4. First motor; 5. First drive shaft; 6. First gear; 7. First rack; 8. Connecting plate; 9. Connecting block; 10. Take-up roller; 11. Slide rail; 12. Connecting rod; 13. Clamping plate; 14. Second rack; 15. Second motor; 16. Second drive shaft; 17. Second gear; 18. Push rod motor; 19. Sliding rod; 20. Laser cutter. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Example 1

[0033] Reference Figures 1-3 A protective film traction cutting device includes a first housing 1, a support frame 2 fixedly connected to one side of the first housing 1, and a second housing 3 fixedly connected to one side of the support frame 2. A first motor 4 is fixedly connected to the bottom inner wall of the first housing 1, and a first transmission shaft 5 is fixedly connected to the output shaft of the first motor 4. The device also includes:

[0034] The movable component is located on the first drive shaft 5;

[0035] The adjustment component is located in the second housing 3.

[0036] Specifically, the moving component includes a first gear 6, which is fixedly connected to one end of the first drive shaft 5. A first rack 7 meshes on the first gear 6, and a connecting plate 8 is fixedly connected to the top of the first rack 7.

[0037] Specifically, two connecting blocks 9 are fixedly connected to one side of the connecting plate 8, and a winding roller 10 is provided on the inner side of the two connecting blocks 9.

[0038] Specifically, the inner wall of the support frame 2 is provided with a slide rail 11, and the other inner wall of the support frame 2 is slidably connected with a connecting rod 12.

[0039] Specifically, one end of the connecting rod 12 is fixedly connected to the clamping plate 13, and one side of the clamping plate 13 is engaged with the slide rail 11. The support frame 2 is equipped with a hydraulic oil tank, and the output pipe of the hydraulic oil tank is connected to the clamping plate 13.

[0040] Specifically, the adjustment assembly includes a second motor 15, which is fixedly connected to the bottom inner wall of the second housing 3, and a second rack 14 is fixedly connected to one end of the connecting rod 12.

[0041] Specifically, the output shaft of the second motor 15 is fixedly connected to the second transmission shaft 16, and the second transmission shaft 16 is fixedly connected to the second gear 17.

[0042] Specifically, the second gear 17 meshes with the second rack 14, and a push rod motor 18 is fixedly connected to one side of the support frame 2. The output shaft of the push rod motor 18 is fixedly connected to a sliding rod 19, and multiple laser cutters 20 are provided on the sliding rod 19.

[0043] The implementation principle of the protective film traction cutting device in this embodiment is as follows: After the first motor 4 is started, its output shaft drives the first transmission shaft 5 to rotate at a constant speed, and the first gear 6 fixed to the transmission shaft rotates synchronously. Since the first gear 6 meshes with the horizontally arranged first rack 7, the rotational motion of the gear is converted into the linear motion of the rack in the horizontal direction. At this time, the connecting plate 8 fixed at the top of the rack will move smoothly with the connecting blocks 9 symmetrically distributed on both sides, and the take-up roller 10 connected to the inner side of the connecting block 9 through the bearing will move smoothly from the storage area inside the support frame 2 to the loading position outside the device as the connecting plate moves. After the operator puts the rolled protective film onto the take-up roller 10 and initially flattens the starting end of the protective film, the first motor 4 is reversed. Through the reverse operation of the gear and rack transmission mechanism, the take-up roller 10 will return to the working area inside the support frame 2. At this time, the hydraulic oil tank of the support frame 2 starts to work. The hydraulic cylinder inside the tank delivers hydraulic oil to the clamping plate 13 through a high-pressure oil pipe, pushing the clamping plate 13 to move along the slide rail 11 on the inner wall of the support frame towards the protective film until the anti-slip rubber pad on the inner side of the clamping plate 13 is tightly attached to the starting end of the protective film, thus achieving the initial clamping and fixing of the protective film and laying the foundation for subsequent traction and deployment. After the initial fixing is completed, the second motor 15 inside the second housing 3 is started. Its output shaft drives the second transmission shaft 16 to rotate, and the second gear 17 on the transmission shaft rotates synchronously. Because the second gear 17 meshes with the second rack 14 fixed at one end of the connecting rod 12, and the other end of the connecting rod 12 is rigidly connected to the clamping plate 13, the rotation of the gear is converted into the horizontal linear motion of the second rack 14, which in turn drives the connecting rod 12 and the clamping plate 13 to move at a constant speed along the slide rail 11. During this process, the slide rail 11 not only provides stable guidance for the clamping plate 13, preventing the clamping plate from shifting and causing wrinkles in the protective film, but also assists in controlling the movement distance through the scale markings on the inner side of the slide rail. The operator can precisely adjust the movement stroke of the clamping plate 13 by controlling the start and stop times of the second motor 15 according to the required unfolded length of the protective film, ensuring that the unfolded length of the protective film meets the cutting requirements. Simultaneously, the take-up roller 10 rotates synchronously with the traction of the protective film (achieving unidirectional rotation through the one-way bearing inside the connecting block 9), preventing the protective film from stretching and deforming during traction. When the protective film is fully unfolded to the preset length, the second motor 15 stops working, and the clamping plate 13 maintains its clamping state on the end of the protective film, preventing the protective film from shifting during cutting. At this time, the push rod motor 18, horizontally mounted on one side of the support frame 2, starts, and its output shaft pushes the sliding rod 19 to move at a constant speed along the preset guide groove. Multiple laser cutters 20 (the spacing of which can be pre-adjusted according to the cutting width) evenly distributed on the sliding rod 19 will move synchronously with the sliding rod 19, and the laser cutters 20 will automatically activate their laser emission function while moving. The high-energy laser beam emitted by the laser cutter 20 will precisely act on the surface of the protective film, forming a continuous cutting trajectory along the moving direction of the sliding rod 19, realizing rapid and burr-free cutting of the protective film.After the cutting is completed, the push rod motor 18 drives the sliding rod 19 and the laser cutter 20 to reset, the hydraulic oil tank control clamp 13 is released, and the operator can remove the cut protective film. Then the device can enter the next round of feeding-traction-cutting cycle.

[0044] Example 2

[0045] The difference between this embodiment and Embodiment 1 is as follows: the first gear 6 / rack is removed and replaced with "first motor 4 + driving pulley + driven pulley + transmission belt", with the transmission belt fixed to the connecting plate 8; the hydraulic oil tank is replaced with a pneumatic pump, the clamping plate 13 is connected to the pneumatic push rod, and the slide rail 11 is retained but the scale markings are simplified; the second gear 17 / rack is replaced with "second motor 15 + ball screw", with the ball screw nut fixed to the connecting rod 12; the sliding rod 19 is replaced with "synchronous belt drive", and the number of laser cutters 20 is reduced to 2 (to adapt to the conventional cutting width). The first motor 4 starts, the pulley drives the transmission belt, pulling the connecting plate 8 and the take-up roller 10 to move out of the loading area. After resetting, the pneumatic pump drives the clamping plate 13 to hold the protective film; the second motor 15 drives the ball screw to rotate, the nut pushes the connecting rod 12 and the clamping plate 13 to move along the slide rail, pulling the protective film to unfold; the synchronous belt drives the sliding rod 19 to move, the laser cutter 20 completes the cutting, and then the pneumatic push rod resets, the clamping plate is released, and the next cycle begins.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A protective film traction and cutting device, comprising a first housing (1), characterized in that, A support frame (2) is fixedly connected to one side of the first housing (1), and a second housing (3) is fixedly connected to one side of the support frame (2). A first motor (4) is fixedly connected to the bottom inner wall of the first housing (1), and a first transmission shaft (5) is fixedly connected to the output shaft of the first motor (4). The housing also includes: A movable component is disposed on the first drive shaft (5); An adjustment component is provided in the second housing (3).

2. The protective film traction and cutting device according to claim 1, characterized in that: The moving component includes a first gear (6), and the first gear (6) is fixedly connected to one end of the first transmission shaft (5). A first rack (7) meshes on the first gear (6), and a connecting plate (8) is fixedly connected to the top of the first rack (7).

3. The protective film traction and cutting device according to claim 2, characterized in that: Two connecting blocks (9) are fixedly connected to one side of the connecting plate (8), and a winding roller (10) is provided on the inner side of the two connecting blocks (9).

4. The protective film traction and cutting device according to claim 3, characterized in that: The inner wall of the support frame (2) is provided with a slide rail (11), and the other inner wall of the support frame (2) is slidably connected with a connecting rod (12).

5. The protective film traction and cutting device according to claim 4, characterized in that: One end of the connecting rod (12) is fixedly connected to a clamp (13), and one side of the clamp (13) is engaged with the slide rail (11). A hydraulic oil tank is provided on the support frame (2), and the output pipe of the hydraulic oil tank is connected to the clamp (13).

6. The protective film traction cutting device according to claim 5, characterized in that: The adjustment assembly includes a second motor (15), and the second motor (15) is fixedly connected to the bottom inner wall of the second housing (3), and a second rack (14) is fixedly connected to one end of the connecting rod (12).

7. A protective film traction cutting device according to claim 6, characterized in that: The output shaft of the second motor (15) is fixedly connected to the second transmission shaft (16), and the second transmission shaft (16) is fixedly connected to the second gear (17).

8. The protective film traction cutting device according to claim 7, characterized in that: The second gear (17) meshes with the second rack (14), and a push rod motor (18) is fixedly connected to one side of the support frame (2). The output shaft of the push rod motor (18) is fixedly connected to a sliding rod (19), and multiple laser cutters (20) are provided on the sliding rod (19).

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