Automatic film pasting and cutting device of winding packaging machine

Abstract

The utility model discloses an automatic film pasting and cutting device of a winding packaging machine, which comprises a processing table, a supporting shaft is rotatably arranged on the upper end face of the processing table through a shaft sleeve, a supporting plate is fixedly arranged on the outer wall of the supporting shaft, a servo motor is fixedly arranged on the inner wall of the processing table, and a rotating disc is fixedly arranged on the outer wall of an output shaft of the servo motor. Two first electric push rods are fixedly mounted on the outer wall of the rotating disc through a first mounting mechanism, and a telescopic groove is formed in the upper end face of the rotating disc. According to the utility model, components such as the screw rod, the moving block and the blade are arranged, the precise transmission structure of the screw rod and the moving block is utilized, and the precise guide of the limiting rod is matched, so that the blade can quickly cut into a film along a linear track in the film breaking process, and the design ensures that the film breaking position error is extremely small, and the fracture is flat and burr-free; the attractiveness and the sealing performance of packaging are effectively improved, and the risk of packaging reworking or goods damage caused by poor film breakage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, and in particular to an automatic film applicator and film cutting device for a stretch wrapping machine. Background Technology

[0002] Packaging machinery is equipment used to automate the packaging process of products or goods. Its core functions include filling (putting products into containers), wrapping (wrapping products with materials), and sealing (sealing the packaging).

[0003] Stretch wrapping machines are automated packaging equipment primarily used to tightly wrap goods, preventing damage during handling and transportation, and providing dustproof, moisture-proof, and hygienic protection. They are widely used in various industries, including foreign trade exports, food and beverage, plastics and chemicals, glass and ceramics, and electromechanical castings. However, in the existing stretch wrapping machine workflow, the film cutting and film application stages after packaging still have many problems. Some machines use manual film cutting and application, which is not only inefficient and difficult to meet the needs of large-scale production, but also prone to inaccurate film cutting positions and uneven film edges due to the instability of manual operation, affecting the overall quality and aesthetics of the packaging and making it impractical. Therefore, it is necessary to redesign an automatic film application and cutting device for stretch wrapping machines to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an automatic film-applying and film-cutting device for a wrapping machine.

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

[0006] An automatic film-applying and film-cutting device for a wrapping machine includes a processing table. A support shaft is rotatably mounted on the upper surface of the processing table via a bushing. A support plate is fixedly mounted on the outer wall of the support shaft. A servo motor is fixedly mounted on the inner wall of the processing table. A rotating disk is fixedly mounted on the outer wall of the output shaft of the servo motor. Two first electric push rods are fixedly mounted on the outer wall of the rotating disk via a first mounting mechanism. A telescopic groove is formed on the upper surface of the rotating disk. A first telescopic opening is formed on the outer wall of the rotating disk to cooperate with the telescopic ends of the two first electric push rods. The telescopic ends of the two first electric push rods are fixedly connected to a connecting mechanism. The clamping plate has a connecting frame fixedly mounted on its upper surface via a connecting block. A guide roller is rotatably mounted inside the connecting frame. A screw is rotatably mounted on the upper surface of the connecting block via a moving groove. A stepper motor cooperating with the screw is fixedly mounted on the outer wall of the connecting block. A moving block is rotatably mounted on the outer wall of the screw via a thread. A limit rod is fixedly mounted inside the moving groove and slides through the moving block. A blade is fixedly mounted on the upper surface of the moving block via a fixed frame. A fixing plate is fixedly mounted on the upper surface of the machining table. A second electric push rod is fixedly mounted on the outer wall of the fixing plate via a second mounting mechanism.

[0007] Preferably, the first mounting mechanism includes a first mounting frame fixedly mounted on the outer wall of the rotating disk, and the first electric actuator is fixedly mounted inside the first mounting frame.

[0008] Preferably, the connecting mechanism includes a connecting plate fixedly installed at the telescopic end of the first electric push rod, and the clamping plate is fixedly installed on the outer wall of the connecting plate.

[0009] Preferably, the second mounting mechanism includes a second mounting frame fixedly mounted on the outer wall of the fixed plate, and the second electric actuator is fixedly mounted inside the second mounting frame.

[0010] Preferably, the outer wall of the fixed plate is provided with a second telescopic opening that cooperates with the telescopic end of the second electric push rod, and the telescopic end of the second electric push rod is slidably installed with two adjusting rods through the moving plate.

[0011] Preferably, the ends of the two adjusting rods are fixedly connected to an adjusting frame, and an adjusting spring is installed on the outer wall of each of the two adjusting rods. The two ends of the two adjusting springs are elastically connected to the moving plate and the outer wall of the adjusting frame, respectively. A film-applying roller is rotatably installed inside the adjusting frame.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting up components such as screws, moving blocks, and blades, and utilizing the precision transmission structure of the screws and moving blocks, combined with the precise guidance of the limit rod, the blade can quickly cut into the film along a straight trajectory during the film cutting process. This design ensures that the film cutting position error is minimal, the cut is smooth and burr-free, effectively improving the aesthetics and sealing of the packaging, and reducing the risk of packaging rework or goods damage due to poor film cutting.

[0014] 2. By setting up components such as a second electric push rod, an adjusting rod, an adjusting spring, and a film-applying roller, the film-applying mechanism composed of the second electric push rod, the adjusting rod, the adjusting spring, and the film-applying roller can automatically adjust the film-applying pressure and the application position according to the shape of the workpiece surface. Whether it is a regular rectangular workpiece or an irregular object with edges or protrusions, the film-applying roller can tightly adhere to the workpiece surface through the elastic deformation of the adjusting spring, ensuring that the film is flat and wrinkle-free. This greatly enhances the adaptability of the device to goods of different shapes and sizes, and significantly improves its versatility. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an automatic film-applying and film-cutting device for a wrapping machine proposed in this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the vertical section structure;

[0017] Figure 3 This is a side view of the automatic film-applying and film-cutting device for a wrapping machine proposed in this utility model.

[0018] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point A in the diagram;

[0019] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B in the diagram;

[0020] Figure 6 for Figure 3 A magnified schematic diagram of the structure at point C.

[0021] In the diagram: 1. Processing table, 2. Bushing, 3. Support shaft, 4. Support plate, 5. Servo motor, 6. Rotary disk, 7. First mounting frame, 8. First electric push rod, 9. Connecting plate, 10. Clamping plate, 11. Connecting block, 12. Connecting frame, 13. Guide roller, 14. Screw, 15. Stepper motor, 16. Limit rod, 17. Moving block, 18. Fixed frame, 19. Blade, 20. Fixed plate, 21. Second mounting frame, 22. Second electric push rod, 23. Moving plate, 24. Adjusting rod, 25. Adjusting frame, 26. Adjusting spring, 27. Film application roller. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-6 An automatic film-applying and film-cutting device for a wrapping machine includes a processing table 1. A support shaft 3 is rotatably mounted on the upper surface of the processing table 1 via a bushing 2. A support plate 4 is fixedly mounted on the outer wall of the support shaft 3. A servo motor 5 is fixedly mounted on the inner wall of the processing table 1. A rotating disk 6 is fixedly mounted on the outer wall of the output shaft of the servo motor 5. Two first electric push rods 8 are fixedly mounted on the outer wall of the rotating disk 6 via a first mounting mechanism. A telescopic groove is formed on the upper surface of the rotating disk 6. A first telescopic opening is formed on the outer wall of the rotating disk 6 to cooperate with the telescopic ends of the two first electric push rods 8. The telescopic ends of the two first electric push rods 8 are fixedly connected to clamping plates 10 via a connecting mechanism. A connecting frame 12 is fixedly installed on the surface via a connecting block 11. A guide roller 13 is rotatably installed inside the connecting frame 12. A screw 14 is rotatably installed on the upper surface of the connecting block 11 via a moving groove. A stepper motor 15 that cooperates with the screw 14 is fixedly installed on the outer wall of the connecting block 11. A moving block 17 is rotatably installed on the outer wall of the screw 14 via a thread. A limit rod 16 is fixedly installed inside the moving groove. The limit rod 16 slides through the moving block 17. A blade 19 is fixedly installed on the upper surface of the moving block 17 via a fixed frame 18. A fixed plate 20 is fixedly installed on the upper surface of the processing table 1. A second electric push rod 22 is fixedly installed on the outer wall of the fixed plate 20 via a second mounting mechanism.

[0024] Furthermore, the servo motor 5 has a high-precision speed control function, which can precisely adjust the rotation speed of the rotating disk 6 within the range of 5-20 rpm according to the packaging requirements of different goods, so as to ensure the uniformity and tightness of film wrapping.

[0025] The first electric actuator 8 is a high-thrust, low-noise electric actuator. Its stroke can be flexibly adjusted within a certain range according to the size of the workpiece, ensuring that the clamping plate 10 can stably clamp workpieces of different sizes. At the same time, the first electric actuator 8 has a built-in overload protection device to prevent damage to the workpiece due to excessive clamping force.

[0026] The stepper motor 15 is equipped with a microstepping driver, which enables microstep control, allowing the blade 19 to move with an accuracy of ±0.1mm, ensuring the accuracy of the film cutting position.

[0027] The first mounting mechanism includes a first mounting frame 7 fixedly mounted on the outer wall of the rotating disk 6, and a first electric actuator 8 fixedly mounted inside the first mounting frame 7.

[0028] Furthermore, the inner wall of the first mounting frame 7 is designed with a reinforcing rib structure to enhance the overall rigidity, while a pre-reserved cable routing groove is provided to facilitate the neat arrangement of the power and control lines of the first electric actuator 8, avoiding cable tangling that could affect the operation of the device.

[0029] The connecting mechanism includes a connecting plate 9 fixedly installed at the telescopic end of the first electric push rod 8, and a clamping plate 10 fixedly installed on the outer wall of the connecting plate 9.

[0030] Furthermore, the connecting plate 9 is made of forged aluminum alloy, milled by CNC machining center, and the surface is anodized, which combines lightweight and high corrosion resistance.

[0031] The second mounting mechanism includes a second mounting frame 21 fixedly mounted on the outer wall of the fixed plate 20, and a second electric push rod 22 fixedly mounted inside the second mounting frame 21.

[0032] Furthermore, the second mounting frame 21 is connected to the fixing plate 20 by welding, which increases the stability of the second electric push rod 22 during installation.

[0033] The outer wall of the fixed plate 20 is provided with a second telescopic opening that cooperates with the telescopic end of the second electric push rod 22. The telescopic end of the second electric push rod 22 is slidably installed with two adjusting rods 24 through the moving plate 23.

[0034] Furthermore, the dimensional accuracy of the second telescopic opening is controlled within ±0.05mm to ensure that the moving plate 23 can pass through smoothly and maintain good sealing.

[0035] The ends of the two adjusting rods 24 are fixedly connected to the adjusting frame 25. The outer walls of the two adjusting rods 24 are each equipped with an adjusting spring 26. The two ends of the two adjusting springs 26 are elastically connected to the moving plate 23 and the outer wall of the adjusting frame 25, respectively. The film-applying roller 27 is rotatably installed inside the adjusting frame 25.

[0036] Furthermore, the adjustment frame 25 adopts a hollow frame design to reduce weight while ensuring strength. The adjustment spring 26 is made of high-elasticity stainless steel, which has good fatigue resistance. Its elastic coefficient can be selected according to different packaging requirements to adapt to workpieces of different shapes and hardness, ensuring that the film application pressure is appropriate.

[0037] In use, the film roll is inserted into the outer wall of the support shaft 3 and supported by the support plate 4. The workpiece can then be placed on the upper surface of the rotating disk 6. At this time, the two first electric push rods 8 extend synchronously and, through the cooperation of the connecting plate 9, drive the clamping plate 10 on the same side to move. This allows the two clamping plates 10 to move relative to each other and move closer to clamp and fix the workpiece. Next, the film is drawn out from the film roll, passes around the guide roller 13 in the connecting frame 12, and wraps around the outer wall of the workpiece. The end of the film is stretched to the position corresponding to the film-applying roller 27. At this time, the second electric push rod 2... 2 can extend to drive the moving plate 23 to move. At this time, the second electric push rod 22 can extend to drive the moving plate 23 to move. The moving plate 23 pushes the adjusting frame 25 and the film-applying roller 27 closer to the workpiece through the adjusting rod 24. When the film-applying roller 27 contacts the film, the adjusting spring 26 begins to be compressed, providing uniform and adaptive pressure to ensure that the film is tightly attached to the surface of the workpiece. During this process, the servo motor 5 is started to drive the rotating disk 6 to drive the workpiece to rotate slowly, so that the film is smoothly wrapped around the outer surface of the workpiece under the rolling action of the film-applying roller 27 to form the initial wrapping layer.

[0038] Once the film is wound to the set number of layers or length, the stepper motor 15 drives the screw 14 to rotate, causing the moving block 17 to move linearly along the limit rod 16. This drives the blade 19 to quickly cut laterally into the film, achieving a clean and crisp cut for various packaging films such as PE and PVC, with a smooth, burr-free cut. After cutting, the stepper motor 15 reverses to reset the blade 19, and then the servo motor 5 can continue to rotate. This allows the workpiece and the end of the film to be pressed flat by the film-applying roller 27. When wrapping the film around a rectangular workpiece, the elastic action of the two adjusting springs 26 allows the film-applying roller 27 to automatically adjust its position and pressure when it contacts the corner of the workpiece. When it contacts the edge of the rectangular workpiece, the adjusting spring 26 is compressed and deformed, keeping the film-applying roller 27 in line contact with the edge, ensuring that the film can still adhere tightly at the corner without wrinkles. In the flat area of ​​the workpiece, the adjusting spring 26 recovers some of its deformation, providing stable film-applying pressure and ensuring the flatness of the film.

[0039] 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. An automatic film-applying and film-cutting device for a stretch wrapping machine, comprising a processing table (1), characterized in that, A support shaft (3) is rotatably mounted on the upper surface of the processing table (1) via a bushing (2). A support plate (4) is fixedly mounted on the outer wall of the support shaft (3). A servo motor (5) is fixedly mounted on the inner wall of the processing table (1). A rotating disk (6) is fixedly mounted on the outer wall of the output shaft of the servo motor (5). Two first electric push rods (8) are fixedly mounted on the outer wall of the rotating disk (6) via a first mounting mechanism. A telescopic groove is provided on the upper surface of the rotating disk (6). A first telescopic opening is provided on the outer wall of the rotating disk (6) to cooperate with the telescopic ends of the two first electric push rods (8). The telescopic ends of the two first electric push rods (8) are fixedly connected to a clamping plate (10) via a connecting mechanism. A connecting block (11) is fixedly mounted on the upper surface of the processing table (1). The connecting frame (12) has a guide roller (13) rotatably mounted inside it. The upper end face of the connecting block (11) is rotatably mounted with a screw (14) through a moving groove. The outer wall of the connecting block (11) is fixedly mounted with a stepper motor (15) that cooperates with the screw (14). The outer wall of the screw (14) is threadedly mounted with a moving block (17). The moving groove is fixedly mounted with a limit rod (16). The limit rod (16) slides through the moving block (17). The upper end face of the moving block (17) is fixedly mounted with a blade (19) through a fixed frame (18). The upper end face of the processing table (1) is fixedly mounted with a fixed plate (20). The outer wall of the fixed plate (20) is fixedly mounted with a second electric push rod (22) through a second mounting mechanism.

2. The automatic film-applying and film-cutting device for a wrapping machine according to claim 1, characterized in that, The first mounting mechanism includes a first mounting frame (7) fixedly mounted on the outer wall of the rotating disk (6), and the first electric push rod (8) fixedly mounted inside the first mounting frame (7).

3. The automatic film-applying and film-cutting device for a wrapping machine according to claim 2, characterized in that, The connecting mechanism includes a connecting plate (9) fixedly installed at the telescopic end of the first electric push rod (8), and a clamping plate (10) fixedly installed on the outer wall of the connecting plate (9).

4. The automatic film applicator and film cutting device for a wrapping machine according to claim 3, characterized in that, The second mounting mechanism includes a second mounting frame (21) fixedly mounted on the outer wall of the fixed plate (20), and the second electric push rod (22) fixedly mounted inside the second mounting frame (21).

5. The automatic film applicator and film cutting device for a wrapping machine according to claim 4, characterized in that, The outer wall of the fixed plate (20) is provided with a second telescopic opening that cooperates with the telescopic end of the second electric push rod (22). The telescopic end of the second electric push rod (22) is slidably installed with two adjusting rods (24) through the moving plate (23).

6. The automatic film applicator and film cutting device for a wrapping machine according to claim 5, characterized in that, An adjustment frame (25) is fixedly connected to the ends of the two adjustment rods (24). An adjustment spring (26) is installed on the outer wall of each of the two adjustment rods (24). The two ends of the two adjustment springs (26) are elastically connected to the moving plate (23) and the outer wall of the adjustment frame (25), respectively. A film-applying roller (27) is rotatably installed inside the adjustment frame (25).

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