Punching device for processing protective film

Abstract

The utility model discloses a punching device for processing a protective film, which belongs to the field of whole raw materials of PET (polyethylene terephthalate) protective films, and comprises a rack, a mounting rack arranged on the rack, an air cylinder mounted on the rack and used for driving the mounting rack to lift, a punching cutter fixed at the bottom of the mounting rack, a telescopic rod fixed at the bottom of the mounting rack, and a punching mechanism fixed at the bottom of the telescopic rod, and a pressing plate is fixed to the bottom end of the telescopic rod, the outer surface of the telescopic rod is sleeved with a first spring, the two ends of the first spring are fixedly connected with the telescopic rod and the pressing plate correspondingly, and a machining mechanism used for polishing the punching tool is arranged on the pressing plate. After the punching cutter completes the punching action on the protective film, the motor is started, the motor drives the sector gear at the output shaft end to rotate and further drives the movable gear ring meshed with the sector gear to move, the movable gear ring drives the fixing frame, and the fixing frame pushes the grinding block to grind the punching cutter through the second spring. And in the process, abrasion traces, generated by punching, on the surface of the cutter can be removed in time.

Description

Technical Field

[0001] This utility model relates to the technical field of PET protective film raw materials, and in particular to a punching device for processing protective film. Background Technology

[0002] In the field of protective film processing, punching equipment is a key piece of equipment to ensure that protective films can be accurately formed. With the widespread application of protective films in many industries such as electronics and packaging, the requirements for the precision and quality of protective film punching are also increasing.

[0003] Existing punching equipment for protective film processing has revealed many problems in actual use. Among them, the wear of the cutting tools is particularly prominent. Due to the variety of materials of protective films, some of which have a certain degree of hardness and stickiness, the cutting tools will suffer significant wear during the punching process. Traditional punching equipment cannot grind and maintain the cutting tools in time after cutting. After the cutting tools are worn, it will not only affect the punching accuracy, resulting in defects such as dimensional deviations and uneven edges in the finished protective film, thus reducing product quality, but may also reduce punching efficiency and increase processing time and cost. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that after the cutting tool is finished, it is impossible to grind and maintain the tool in time. After the tool wears down, it will not only affect the cutting accuracy, but also cause defects such as dimensional deviation and uneven edges in the finished protective film, thus reducing product quality. It may also reduce the cutting efficiency and increase the processing time and cost. Therefore, this invention proposes a cutting device for processing protective film.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A punching device for processing protective film includes a frame, a mounting frame on the frame, a cylinder mounted on the frame for lifting the mounting frame, a punching cutter fixed to the bottom of the mounting frame, a telescopic rod fixed to the bottom of the mounting frame, a pressure plate fixed to the bottom end of the telescopic rod, a spring sleeved on the outer surface of the telescopic rod, the two ends of the spring being fixedly connected to the telescopic rod and the pressure plate respectively, and a processing mechanism for grinding the punching cutter on the pressure plate, the processing mechanism including a grinding block that fits against the punching cutter.

[0007] Preferably, the processing mechanism further includes a mounting block fixed on the pressing plate, a motor fixed on the mounting block, and a sector gear fixed to the output shaft end of the motor.

[0008] Preferably, a movable gear ring meshes with the outer surface of the sector gear, and a fixed frame is fixed on the movable gear ring.

[0009] Preferably, a second spring is fixed to the side of the fixing frame near the grinding block, and the end of the second spring away from the fixing frame is fixedly connected to the grinding block.

[0010] Preferably, the pressing plate is provided with an air blowing mechanism for cooling the punching tool. The air blowing mechanism includes an L-shaped block fixed on the pressing plate, a fixed cylinder fixed on the L-shaped block, an extrusion rod sliding inside the fixed cylinder, and the extrusion rod being fixedly connected to a movable toothed ring.

[0011] Preferably, a piston disc is fixed at the end of the extrusion rod away from the movable toothed ring, the piston disc slides inside the fixed cylinder, and an air inlet pipe is connected to the outer surface of the fixed cylinder.

[0012] Preferably, a rectangular block is fixed to the top of the movable toothed ring, and an air jet is fixed to the side of the rectangular block near the punching tool. The end of the air inlet pipe away from the fixed cylinder is connected to the air jet.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. After the punching cutter completes the punching action on the entire PET protective film raw material, the motor is started. The motor drives the sector gear at the output shaft to rotate, which in turn drives the moving gear ring that meshes with it to move. The moving gear ring drives the fixed frame, which pushes the grinding block through the spring to grind the punching cutter. This process can remove the wear marks on the cutter surface caused by punching in time, effectively restore the sharpness of the cutter, and ensure that the punching accuracy of the entire PET protective film raw material is always maintained at a high level in subsequent punching operations. This reduces the product defect rate caused by cutter wear and improves production efficiency and product quality.

[0015] 2. When the moving gear ring moves, the extrusion rod, which is fixedly connected to it, slides synchronously inside the fixed cylinder. The extrusion rod pushes the piston disc, which compresses the air in the fixed cylinder through the air inlet pipe to the jet head. The jet head then blows air at the punching tool. This process can promptly remove the heat generated by the punching tool during operation, preventing the tool from deforming due to prolonged high temperatures, effectively extending the tool's service life. It also helps to ensure punching accuracy, ensuring the stability and continuity of the entire raw material processing of PET protective film. At the same time, it prevents the heat on the punching tool from affecting the punching process when cutting the protective film next time. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a punching device for processing protective film proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the mounting frame structure of a punching device for processing protective film proposed in this utility model;

[0018] Figure 3 This utility model proposes a punching device for processing protective films. Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 This utility model proposes a punching device for processing protective films. Figure 2 Enlarged schematic diagram of the structure at point B;

[0020] Figure 5 This is a side view of the mounting frame structure of a punching device for processing protective film proposed in this utility model;

[0021] Figure 6 This is a bottom view schematic diagram of the mounting frame structure of a punching device for processing protective film proposed in this utility model.

[0022] In the diagram: 1. Frame; 2. Mounting bracket; 3. Punching cutter; 41. Telescopic rod; 42. Pressing plate; 43. Spring 1; 51. Mounting block; 52. Motor; 53. Sector gear; 54. Moving gear ring; 55. Fixed bracket; 56. Spring 2; 57. Grinding block; 61. L-shaped block; 62. Fixed cylinder; 63. Extrusion rod; 64. Piston disc; 65. Air inlet pipe; 66. Rectangular block; 67. Jet nozzle. Detailed Implementation

[0023] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Reference Figures 1-6 A punching device for processing protective film includes a frame 1, a mounting frame 2 on the frame 1, a cylinder for driving the mounting frame 2 to rise and fall on the frame 1, a punching cutter 3 fixed at the bottom of the mounting frame 2, a telescopic rod 41 fixed at the bottom of the mounting frame 2, a pressing plate 42 fixed at the bottom end of the telescopic rod 41, a spring 43 sleeved on the outer surface of the telescopic rod 41, the two ends of the spring 43 being fixedly connected to the telescopic rod 41 and the pressing plate 42 respectively, and a processing mechanism for grinding the punching cutter 3 on the pressing plate 42, the processing mechanism including a grinding block 57 that fits against the punching cutter 3.

[0026] Furthermore, the processing mechanism also includes a mounting block 51 fixed on the pressing plate 42, a motor 52 fixed on the mounting block 51, and a sector gear 53 fixed to the output shaft end of the motor 52.

[0027] Furthermore, a movable gear ring 54 meshes with the outer surface of the sector gear 53, and a fixed bracket 55 is fixed on the movable gear ring 54.

[0028] Furthermore, a second spring 56 is fixed to the side of the fixing frame 55 near the grinding block 57, and the end of the second spring 56 away from the fixing frame 55 is fixedly connected to the grinding block 57.

[0029] When performing punching operations on the entire raw material of PET protective film, the entire raw material of PET protective film to be processed is first placed in the designated position. The cylinder is started, which drives the mounting frame 2 to descend. The punching cutter 3 at the bottom of the mounting frame 2 punches the entire raw material of PET protective film. After the punching is completed, the cylinder drives the mounting frame 2 to rise and reset. At this time, the motor 52 on the mounting block 51 is started. The output shaft of the motor 52 drives the sector gear 53 to start rotating.

[0030] Since the sector gear 53 and the movable gear ring 54 mesh with each other, when the key teeth of the sector gear 53 rotate to mesh with the key teeth on the top wall of the movable gear ring 54, it will drive the movable gear ring 54 to move to the right. When the key teeth of the sector gear 53 rotate to mesh with the key teeth on the bottom wall of the movable gear ring 54, it will drive the movable gear ring 54 to move to the left. Therefore, the rotation of the sector gear 53 will drive the movable gear ring 54 to move back and forth. The fixed bracket 55 fixed on the movable gear ring 54 will also move accordingly. The fixed bracket 55 pushes the grinding block 57 to fit tightly against the punching tool 3 through the second spring 56. Under the continuous movement of the movable gear ring 54, the grinding block 57 grinds along the cutting edge of the punching tool 3, removes the wear marks on the tool surface caused by punching the entire raw material of PET protective film in time, quickly restores the sharpness of the tool, and ensures that the high-precision punching effect can be maintained when punching the entire raw material of PET protective film next time, effectively reducing the occurrence of defective products.

[0031] It should be noted that when the cylinder drives the mounting bracket 2 to move down, the pressing plate 42 will first come into contact with the entire raw material of the PET protective film. Through the elastic force of the spring 43, the punching cutter 3 will move down between the two grinding blocks 57 to complete the punching operation. When the mounting bracket 2 is reset, the punching cutter 3 will also be reset, thus repositioned between the two grinding blocks 57 so that it can perform the grinding operation.

[0032] Based on Example 1, Example 2:

[0033] Reference Figures 1-6Furthermore, the pressing plate 42 is provided with an air blowing mechanism for cooling the punching tool 3. The air blowing mechanism includes an L-shaped block 61 fixed on the pressing plate 42, a fixed cylinder 62 fixed on the L-shaped block 61, and an extrusion rod 63 sliding inside the fixed cylinder 62. The extrusion rod 63 is fixedly connected to the movable toothed ring 54.

[0034] Furthermore, a piston disc 64 is fixed to one end of the extrusion rod 63 away from the moving toothed ring 54. The piston disc 64 slides inside the fixed cylinder 62, and an air inlet pipe 65 is connected to the outer surface of the fixed cylinder 62.

[0035] Furthermore, a rectangular block 66 is fixed to the top of the movable gear ring 54, and an air jet head 67 is fixed to the side of the rectangular block 66 near the punching tool 3. The end of the air inlet pipe 65 away from the fixed cylinder 62 is connected to the air jet head 67.

[0036] After punching and preliminary grinding are completed in Example 1, as the moving gear ring 54 moves, the extrusion rod 63, which is fixedly connected to it, slides synchronously in the fixed cylinder 62. The extrusion rod 63 drives the piston disc 64 at its end to reciprocate in the fixed cylinder 62.

[0037] When the piston disc 64 moves toward the jet head 67, the air in the fixed cylinder 62 is compressed and flows toward the jet head 67 through the air inlet pipe 65. At this time, the jet head 67 sprays the compressed air toward the punching tool 3. The high-speed airflow quickly carries away the heat generated by the punching tool 3 during the punching process. This not only prevents the tool from deforming due to prolonged exposure to high temperatures, effectively extending the tool's service life, but also ensures that the punching tool 3 will not affect the punching process due to its own excessive temperature in subsequent punching operations. This ensures the stability and continuity of the entire raw material processing of PET protective film, and improves product quality and production efficiency.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A punching device for processing protective film, comprising a frame (1), characterized in that, A mounting bracket (2) is provided on the frame (1). A cylinder for driving the mounting bracket (2) to rise and fall is installed on the frame (1). A punching cutter (3) is fixed at the bottom of the mounting bracket (2). A telescopic rod (41) is fixed at the bottom of the mounting bracket (2). A pressing plate (42) is fixed at the bottom end of the telescopic rod (41). A spring (43) is sleeved on the outer surface of the telescopic rod (41). The two ends of the spring (43) are fixedly connected to the telescopic rod (41) and the pressing plate (42) respectively. A processing mechanism for grinding the punching cutter (3) is provided on the pressing plate (42). The processing mechanism includes a grinding block (57) that fits against the punching cutter (3).

2. The punching device for processing protective film according to claim 1, characterized in that, The processing mechanism also includes a mounting block (51) fixed on the pressing plate (42), on which a motor (52) is fixed, and a sector gear (53) is fixed at the output shaft end of the motor (52).

3. The punching device for processing protective film according to claim 2, characterized in that, The outer surface of the sector gear (53) is engaged with a movable gear ring (54), and a fixed bracket (55) is fixed on the movable gear ring (54).

4. The punching device for processing protective film according to claim 3, characterized in that, A second spring (56) is fixed to the side of the fixing frame (55) near the grinding block (57), and the end of the second spring (56) away from the fixing frame (55) is fixedly connected to the grinding block (57).

5. The punching device for processing protective film according to claim 3, characterized in that, The pressing plate (42) is provided with an air blowing mechanism for cooling the punching tool (3). The air blowing mechanism includes an L-shaped block (61) fixed on the pressing plate (42), a fixed cylinder (62) fixed on the L-shaped block (61), and an extrusion rod (63) sliding inside the fixed cylinder (62). The extrusion rod (63) is fixedly connected to the moving toothed ring (54).

6. The punching device for processing protective film according to claim 5, characterized in that, A piston disc (64) is fixed at one end of the extrusion rod (63) away from the moving toothed ring (54). The piston disc (64) slides inside the fixed cylinder (62). An air inlet pipe (65) is connected to the outer surface of the fixed cylinder (62).

7. The punching device for processing protective film according to claim 6, characterized in that, A rectangular block (66) is fixed to the top of the movable toothed ring (54), and an air jet (67) is fixed to the side of the rectangular block (66) near the punching tool (3). The end of the air inlet pipe (65) away from the fixed cylinder (62) is connected to the air jet (67).

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