Film cutting device for plastic extrusion casting film machine

Abstract

The utility model discloses a film cutting device for a plastic extrusion casting film machine, and relates to the technical field of film cutting. The upper end of the supporting frame is fixedly connected with a connecting plate, the upper end of the connecting plate is symmetrically and fixedly connected with fixing structures, the upper portions of the two fixing structures are jointly and fixedly connected with an upper top plate, the middle of the upper end of the upper top plate is fixedly connected with a hydraulic cylinder, and the output end of the hydraulic cylinder penetrates through the upper end of the upper top plate to extend to the lower portion and is fixedly connected with a cutting edge structure. The driving structure can be driven to ascend and descend through operation of the first motor, then the driving structure is used for driving the clamping plate structure to ascend and descend, and therefore the device can fix films of different sizes and thicknesses, when the device cuts off the films, the tension of the films can be maintained, and instability of the tension of the films is prevented; therefore, the cutting quality is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of film cutting, in particular to a film cutting device for a plastic extrusion cast film machine. Background Art

[0002] When the cast film unit is producing film, the extruded film is continuous. When the film is wound on the reel to the set number of meters, the film needs to be cut, and the reel needs to be replaced before the film is wound again. In the plastic extrusion cast film machine, the continuous production of film requires an efficient and precise cutting device to ensure product quality and production efficiency. This device must not only be able to cut the film quickly and accurately, but also ensure that the edge of the cut film is flat and flawless, so as to meet the requirements of downstream processing or application.

[0003] With the continuous growth of market demand for film materials, especially the increasing demand for wide-width films, traditional film cutting devices are facing some challenges. Traditional cutting devices usually use rodless cylinders to drive the cutter, but this design has some limitations when increasing the cutter's running length and improving the running speed. First, as the cutter's running length increases, the size of the rodless cylinder also needs to be increased accordingly, which may cause the overall size of the device to be too large, which is not conducive to assembly and maintenance. In addition, large rodless cylinders may face stability and precision problems when running at high speeds, making it difficult to further increase the cutter's running speed; secondly, traditional film cutting devices often find it difficult to effectively control the tension of the film when cutting the film. The instability of the film tension will lead to a decline in cutting quality, such as uneven cutting surface, film breakage and other problems, which not only affects the appearance quality of the film, but may also affect its performance.

[0004] Chinese patent document CN214818755U discloses a film cutting device for a plastic extrusion cast film machine, comprising wall panels, a knife holder rotatably disposed between two wall panels, a conveyor belt disposed on the knife holder, and a cutter fixed to the conveyor belt. The knife holder is driven by a pusher to rotate close to the film and then cut it. However, the following defects still exist during implementation:

[0005] Although the device in the above-mentioned document can achieve the cutter's work of cutting the film by installing a conveyor belt on the knife holder and using the conveyor belt to drive the cutter to move back and forth, the device in the above-mentioned document cannot ensure the tension of the film when cutting the film during use, thereby preventing the instability of the film tension and causing a decrease in cutting quality. Utility Model Content

[0006] The purpose of the utility model is to provide a film cutting device for a plastic extrusion cast film machine to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A film cutting device for a plastic extrusion cast film machine includes a support frame; a connecting plate is fixedly connected to the upper end of the support frame, a fixed structure is symmetrically fixedly connected to the upper end of the connecting plate, an upper top plate is commonly fixedly connected to the upper ends of the two fixed structures, a hydraulic cylinder is fixedly connected to the middle of the upper end of the upper top plate, an output end of the hydraulic cylinder passes through the upper end of the upper top plate and extends to the lower part, and a cutting blade structure is fixedly connected to the output end of the hydraulic cylinder.

[0009] A further improvement of the technical solution of the present utility model is that the fixed structure includes two support plates, a motor 1 is commonly provided in the middle of the two support plates, the opposite surfaces of the two support plates are fixedly connected to the driving structure, and one side of the driving structure is fixedly connected to two splint structures.

[0010] The above-mentioned technical solution is adopted, in which the driving structure is driven to rise and fall by the output end of motor 1, so that the driving structure can be used to drive the splint structure to rise and fall, and then the splint structure is used to fix films of different sizes and thicknesses. By simply adjusting motor 1, the operator can quickly change the position height of the splint structure to ensure that the film is properly fixed. This flexibility enables the equipment to cope with various production needs, improving its use value and production efficiency.

[0011] A further improvement of the technical solution of the present invention is that a sliding groove is provided on the upper end of the support plate, which passes through the upper end of the support plate and extends to the lower part, and the sliding groove is T-shaped.

[0012] The above technical solution is adopted, in which the slide groove is designed as a T-shaped structure, which can provide good positioning and guiding functions. When other components or parts need to be connected or matched with the support plate, the slide groove can ensure that they are installed in the correct manner and position. This design helps to reduce errors and deviations during assembly and improve the stability and reliability of the equipment.

[0013] A further improvement of the technical solution of the present utility model is that the splint structure includes a main board, a sliding block is fixedly connected to one side of the main board close to the support board, and a rubber plate is fixedly connected to the upper end of the main board.

[0014] The above-mentioned technical solution is adopted, in which the rubber plate is made of rubber material. When the rubber plate needs to be used to fix the film, the rubber plate can fit tightly to the surface of the film and provide strong gripping force. This gripping force helps to maintain the tension of the film during the cutting process and prevent it from loosening or moving, thereby ensuring the accuracy and consistency of the cutting; during the cutting process, the contact between the tool and the film may generate impact and vibration. The fixing device of the rubber plate can absorb these impacts and vibrations, reducing damage to the film and equipment. This shock absorption and buffering effect not only helps to protect the integrity of the film, but also extends the service life of the equipment.

[0015] A further improvement of the technical solution of the present invention is that the slider is T-shaped, and the outer surface of the slider is slidably connected to the inner cavity of the slide groove.

[0016] The above-mentioned technical solution is adopted, in which the slider is set to T-shape, so that the slider can slide along a predetermined trajectory in the inner cavity of the slide groove. This structure limits the freedom of the slider during the sliding process, thereby ensuring that the slider can move accurately along the inner cavity of the slide groove, thereby reducing the possibility of the slider deviating from the correct path during the sliding process and preventing accidental jamming or dislocation.

[0017] A further improvement of the technical solution of the present utility model is that: the driving structure includes a shell, the side of the shell on the same side close to the support plate is fixedly connected to the support plate, the inner cavity of the shell is rotatably connected to a gear, the inner cavity of the gear is fixedly connected to the output end surface of motor one, one side of the outer surface of the gear is meshed with rack one, the side of the outer surface of the gear away from rack one is meshed with rack two, the outer surface of rack one and the outer surface of rack two are jointly slidably connected to the shell, and the side of rack one close to the main board and the side of rack two close to the main board are both fixedly connected to the main board at the same horizontal height.

[0018] The above technical solution is adopted, in which the gears are used to mesh rack one and rack two, thereby driving rack one and rack two to rise and fall, and then driving the main board to change its position, so that the device can fix films of different thicknesses.

[0019] A further improvement of the technical solution of the present utility model is that: the cutting blade structure includes a connecting frame, the upper end of the connecting frame is fixedly connected to the output end of the hydraulic cylinder, the lower part of the connecting frame is rotatably connected to a threaded rod, the lower part of the connecting frame is fixedly connected to a guide rod, the outer surface of the guide rod is slidably connected to a cutter, the outer surface of the threaded rod is threadedly connected to the cutter, one side of the connecting frame is fixedly connected to motor 2, and the output end of motor 2 is fixedly connected to the threaded rod.

[0020] The above technical solution is adopted. In this solution, since Motor 2 can drive the threaded rod to rotate, and the threaded rod can drive the cutter to move, this linkage mechanism makes the cutting action faster and more efficient. For production lines that need to process large quantities of films, this high-efficiency cutting mechanism can significantly improve production efficiency; and since the displacement between the threaded rod and the cutter is precisely controlled, high-precision cutting can be achieved, which is very important for application scenarios that require precise control of the film length, and helps to improve product quality and reduce scrap rate. Through the cooperation of Motor 2 and the threaded rod, the operation process can be simplified and the operation steps can be reduced. The operator only needs to control the rotation of Motor 2 to cut the film. The operation is simple and intuitive, which reduces the operation difficulty and training costs.

[0021] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0022] 1. The utility model provides a film cutting device for a plastic extrusion cast film machine. Through the operation of motor 1, the driving structure can be driven to rise and fall, and then the driving structure is used to drive the clamping structure to rise and fall, so that the device can fix films of different sizes and thicknesses. When the device cuts the film, the tension of the film can be maintained to prevent the instability of the film tension, which may lead to a decrease in cutting quality.

[0023] 2. The utility model provides a film cutting device for a plastic extrusion cast film machine. Through the cooperation of a hydraulic cylinder and a connecting frame, the output end of the hydraulic cylinder can be used to drive the connecting frame to rise and fall, so that the blade of the cutter can be in close contact with the film, and the device can be suitable for films at different heights. The threaded rod is driven to rotate by motor 2, and then the threaded rod and the cutter are used to cooperate to drive the cutter to move, so that the device can cut the film more simply and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the fixed structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the support plate of the present utility model;

[0028] Figure 4 This is a schematic diagram of the driving structure of the utility model;

[0029] Figure 5 This is a schematic diagram of the plywood structure of the present utility model;

[0030] Figure 6 This is a schematic diagram of the cutting blade structure of the present utility model;

[0031] In the figure: 1. Support frame; 2. Connecting plate; 3. Fixed structure; 31. Support plate; 311. Slide groove; 32. Motor 1; 33. Driving structure; 331. Housing; 332. Gear; 333. Rack 1; 334. Rack 2; 34. Clamping plate structure; 341. Main board; 342. Slider; 343. Rubber sheet; 4. Upper plate; 5. Hydraulic cylinder; 6. Cutting blade structure; 61. Connecting frame; 62. Threaded rod; 63. Guide rod; 64. Cutter; 65. Motor 2. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the embodiments:

[0033] Example 1

[0034] like Figure 1-6 As shown, the utility model provides a film cutting device for a plastic extrusion cast film machine, including a support frame 1; a connecting plate 2 is fixedly connected to the upper end of the support frame 1, and a fixed structure 3 is symmetrically fixedly connected to the upper end of the connecting plate 2, and the upper parts of the two fixed structures 3 are commonly fixedly connected to an upper top plate 4, and a hydraulic cylinder 5 is fixedly connected to the middle part of the upper end of the upper top plate 4, and the output end of the hydraulic cylinder 5 passes through the upper end of the upper top plate 4 and extends to the lower part, and the output end of the hydraulic cylinder 5 is fixedly connected to a cutting blade structure 6.

[0035] In this embodiment, the entire device is supported by the cooperation of the support frame 1 and the connecting plate 2, the film is fixed by the fixed structure 3, and then when the film is cut, the tension of the film is maintained and the incision position of the film is fixed. The hydraulic cylinder 5 is supported by the upper top plate 4, and the cutting blade structure 6 is driven to rise and fall by the hydraulic cylinder 5, and the film is cut by the cutting blade structure 6.

[0036] Example 2

[0037] like Figure 2 and Figure 4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the fixed structure 3 includes two support plates 31, a motor 32 is commonly provided in the middle of the two support plates 31, and the opposite surfaces of the two support plates 31 are fixedly connected to a driving structure 33, and one side of the driving structure 33 is fixedly connected to two clamping plate structures 34;

[0038] The driving structure 33 includes a shell 331, and the side of the shell 331 on the same side close to the support plate 31 is fixedly connected to the support plate 31, the inner cavity of the shell 331 is rotatably connected to the gear 332, the inner cavity of the gear 332 is fixedly connected to the output end surface of the motor 1 32, one side of the outer surface of the gear 332 is meshed with the rack 1 333, and the side of the outer surface of the gear 332 away from the rack 1 333 is meshed with the rack 2 334, the outer surface of the rack 1 333 and the outer surface of the rack 2 334 are jointly slidably connected to the shell 331, and the side of the rack 1 333 close to the main board 341 and the side of the rack 2 334 close to the main board 341 are both fixedly connected to the main board 341 at the same horizontal height.

[0039] In this embodiment, the motor 1 32 is operated, and the output end of the motor 1 32 drives the gear 332 to rotate in the inner cavity of the shell 331, and then the gear 332 is used to mesh the adjacent rack 1 333 and rack 2 334, driving the rack 1 333 and rack 2 334 to slide in the inner cavity of the shell 331, and then driving the main board 341 to move.

[0040] Example 3

[0041] like Figure 3 and Figure 5 As shown, based on Example 2, the utility model provides a technical solution: preferably, a sliding groove 311 is provided at the upper end of the support plate 31, which passes through the upper end of the support plate 31 and extends to the lower part, and the sliding groove 311 is T-shaped. The splint structure 34 includes a main board 341, and a slider 342 is fixedly connected to the side of the main board 341 close to the support plate 31. A rubber plate 343 is fixedly connected to the upper end of the main board 341, and the slider 342 is T-shaped, and the outer surface of the slider 342 is slidably connected to the inner cavity of the sliding groove 311.

[0042] In this embodiment, when the main board 341 on the same side moves toward the opposite surface, the slider 342 will slide in the inner cavity of the slide groove 311, and then with the cooperation of the two rubber plates 343, the film to be cut can be clamped and fixed, and then the hydraulic cylinder 5 is operated to push the cutting blade structure 6 toward the direction of the film through the output end of the hydraulic cylinder 5.

[0043] Example 4

[0044] like Figure 6 As shown, on the basis of Example 3, the utility model provides a technical solution: preferably, the cutting blade structure 6 includes a connecting frame 61, the upper end of the connecting frame 61 is fixedly connected to the output end of the hydraulic cylinder 5, the lower part of the connecting frame 61 is rotatably connected to the threaded rod 62, the lower part of the connecting frame 61 is fixedly connected to the guide rod 63, the outer surface of the guide rod 63 is slidably connected to the cutter 64, the outer surface of the threaded rod 62 is threadedly connected to the cutter 64, and a motor 2 65 is fixedly connected to one side of the connecting frame 61, and the output end of the motor 2 65 is fixedly connected to the threaded rod 62.

[0045] In this embodiment, when the output end of the hydraulic cylinder 5 pushes the cutting blade structure 6 to move to a certain position, the blade of the cutter 64 contacts the film, and then the motor 2 65 is operated, and the output end of the motor 2 65 drives the threaded rod 62 to rotate, and then the threaded rod 62 and the cutter 64 cooperate to drive the cutter 64 to move. At the same time, the guide rod 63 cooperates with the cutter 64 to limit the movement trajectory of the cutter 64, and then the film is cut by the cutter 64.

[0046] The following specifically describes the working principle of the film cutting device for the plastic extrusion cast film machine.

[0047] like Figure 1-6 As shown, when the film needs to be cut, first, the motor 1 32 is operated, and the output end of the motor 1 32 drives the gear 332 to rotate in the inner cavity of the housing 331, and then the gear 332 is used to mesh the adjacent rack 1 333 and rack 2 334, driving the rack 1 333 and rack 2 334 to slide in the inner cavity of the housing 331, and then driving the main board 341 to move;

[0048] When the main plate 341 on the same side moves toward the opposite side, the slider 342 slides in the inner cavity of the slide groove 311, and then, with the cooperation of the two rubber plates 343, it can clamp and fix the film to be cut. Then, the hydraulic cylinder 5 is operated, and the output end of the hydraulic cylinder 5 pushes the cutting blade structure 6 toward the film.

[0049] When the output end of the hydraulic cylinder 5 pushes the cutting blade structure 6 to move to a certain position, the blade of the cutter 64 contacts the film, and then the motor 2 65 is operated, and the output end of the motor 2 65 drives the threaded rod 62 to rotate, and then the threaded rod 62 and the cutter 64 cooperate to drive the cutter 64 to move. At the same time, the guide rod 63 cooperates with the cutter 64 to limit the movement trajectory of the cutter 64, and then the film is cut by the cutter 64.

[0050] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A film cutting device for a plastic extrusion cast film machine, comprising a support frame (1); characterized in that: The upper end of the support frame (1) is fixedly connected to a connecting plate (2), the upper end of the connecting plate (2) is symmetrically fixedly connected to a fixing structure (3), the upper parts of the two fixing structures (3) are commonly fixedly connected to an upper top plate (4), the middle part of the upper end of the upper top plate (4) is fixedly connected to a hydraulic cylinder (5), the output end of the hydraulic cylinder (5) passes through the upper end of the upper top plate (4) and extends to the lower part, and the output end of the hydraulic cylinder (5) is fixedly connected to a cutting blade structure (6).

2. The film cutting device for a plastic extrusion cast film machine according to claim 1, characterized in that: The fixed structure (3) comprises two support plates (31), a motor 1 (32) is commonly provided in the middle of the two support plates (31), the opposite surfaces of the two support plates (31) are fixedly connected to a driving structure (33), and one side of the driving structure (33) is fixedly connected to two clamping plate structures (34).

3. The film cutting device for a plastic extrusion cast film machine according to claim 2, characterized in that: The upper end of the support plate (31) is provided with a slide groove (311) that passes through the upper end of the support plate (31) and extends to the lower part, and the slide groove (311) is T-shaped.

4. The film cutting device for a plastic extrusion cast film machine according to claim 3, characterized in that: The splint structure (34) comprises a main board (341), a sliding block (342) is fixedly connected to a side of the main board (341) close to the support board (31), and a rubber plate (343) is fixedly connected to the upper end of the main board (341).

5. The film cutting device for a plastic extrusion cast film machine according to claim 4, characterized in that: The slider (342) is T-shaped, and the outer surface of the slider (342) is slidably connected to the inner cavity of the slide groove (311).

6. The film cutting device for a plastic extrusion cast film machine according to claim 3, characterized in that: The driving structure (33) includes a shell (331), a side of the shell (331) on the same side close to the support plate (31) is fixedly connected to the support plate (31), the inner cavity of the shell (331) is rotatably connected to a gear (332), the inner cavity of the gear (332) is fixedly connected to the output end surface of the motor (32), one side of the outer surface of the gear (332) is meshedly connected to the rack (333), the side of the outer surface of the gear (332) away from the rack (333) is meshedly connected to the rack (334), the outer surface of the rack (333) and the outer surface of the rack (334) are both slidably connected to the shell (331), and the side of the rack (333) close to the main board (341) and the side of the rack (334) close to the main board (341) are both fixedly connected to the main board (341) at the same horizontal height.

7. The film cutting device for a plastic extrusion cast film machine according to claim 1, characterized in that: The cutting blade structure (6) comprises a connecting frame (61), the upper end of the connecting frame (61) is fixedly connected to the output end of the hydraulic cylinder (5), the lower part of the connecting frame (61) is rotatably connected to a threaded rod (62), the lower part of the connecting frame (61) is fixedly connected to a guide rod (63), the outer surface of the guide rod (63) is slidably connected to a cutter (64), the outer surface of the threaded rod (62) is threadedly connected to the cutter (64), and one side of the connecting frame (61) is fixedly connected to a second motor (65), and the output end of the second motor (65) is fixedly connected to the threaded rod (62).

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