Automatic film cutting device for a wrapping machine

Abstract

The utility model discloses a kind of automatic film breaking devices of winding packaging machine, belong to winding packaging machine technical field, including with the mounting base plate of winding packaging machine film outlet end fixed connection, the front side wall of mounting base plate is sequentially provided with clamping mechanism, film breaking mechanism and pressure mechanism in the direction of far from winding packaging machine film outlet end;The clamping mechanism includes with the frame shell of mounting base plate front side wall fixed connection, the rear side upper portion of the frame shell is fixedly connected with micro motor, the main shaft end of micro motor is penetrated to frame shell and fixedly connected with bidirectional screw rod.In the utility model, by setting clamping mechanism, the film breaking end portion of winding film can be clamped to be positioned, can prevent it from falling off when subsequent film breaking work, so as to continue to carry out winding packing use subsequently, set film breaking mechanism, adopt the mode of two blades abutting to cut off winding film, compared with the mode of one side advancing cutting, the cutting effect of this structure to winding film is more stable.

Description

Technical Field

[0001] This utility model belongs to the technical field of stretch wrapping machines, specifically an automatic film cutting device for stretch wrapping machines. Background Technology

[0002] Stretch wrapping machines are automated packaging equipment that protect goods from damage and contamination, improve transportation efficiency and safety, and are widely used in the packaging of export goods, food and beverages, plastics and chemicals, glass and ceramics, electromechanical castings and other products. They can prevent damage to goods during handling and also play a role in dust prevention, moisture prevention and cleaning. After the stretch wrapping machine has wrapped the surface of the goods to be sealed with stretch film, the stretch film needs to be cut.

[0003] In a Chinese patent for an automatic film-cutting device for a stretch wrapping machine (authorization number: CN219750289U), the device includes a mounting plate. A stretch wrapping device is fixedly mounted on one side of the top surface of the mounting plate. A fixing frame is fixedly mounted on one side of the stretch wrapping device. A film-cutting device body is mounted on one end of the fixing frame. The film-cutting device body includes a first cylinder. A mounting shell is mounted on the output end of the first cylinder. A pressing plate is fixedly mounted inside one side of the mounting shell. A rubber pad is fixedly mounted on one side of the pressing plate. When it is necessary to cut the stretch wrapping film on the surface of the goods, the switch of the first cylinder is turned on, and the first cylinder... The output end pushes the mounting shell and the pressing plate to move. When the rubber pad installed on one side of the pressing plate is in contact with the stretch film that needs to be cut on the surface of the goods, the switch of the first cylinder is turned off, and the switch of the second cylinder in the fixed frame is turned on. The second cylinder pushes the cutter to cut the stretch film that needs to be cut. However, the device does not have a mechanism to clamp and position the cut end of the stretch film. The cut end of the stretch film will fall off, which is not convenient to handle during subsequent wrapping and affects the wrapping efficiency. In addition, the cutter only pushes and cuts on one side of the stretch film. Since the stretch film is elastic, the cutting effect is not good. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides the following technical solution: an automatic film-cutting device for a wrapping machine, comprising a mounting base fixedly connected to the film outlet end of the wrapping machine, wherein a clamping mechanism, a film-cutting mechanism, and a pressing mechanism are sequentially arranged on the front sidewall of the mounting base along the direction away from the film outlet end of the wrapping machine; the clamping mechanism includes a frame fixedly connected to the front sidewall of the mounting base, wherein a micro motor is fixedly connected to the upper rear side of the frame, the main shaft end of the micro motor passes through the frame and is fixedly connected to a bidirectional lead screw, and two symmetrically arranged nut blocks are threaded onto the bidirectional lead screw, wherein a first connecting rod is fixedly connected to the lower wall of each of the two nut blocks, and the lower end of each first connecting rod extends to the inner side of the frame and is fixedly connected to a clamping roller.

[0005] As a further embodiment of this utility model: the membrane breaking mechanism includes a U-shaped frame fixedly connected to the front side wall of the mounting substrate. A rectangular frame is fixedly connected to the front end of the U-shaped frame. A miniature cylinder is fixedly connected to the middle of one side of the rectangular frame. Both the upper and lower ends of the rectangular frame are connected to a cover. The inner wall of each cover is rotatably connected to a turntable via a rotating shaft. Two parallel pull rods are hinged to both sides of the turntable. A slider is hinged to the far end of each of the two pull rods. A connecting rod is fixedly connected to the opposite side of each of the two sets of sliders. Two symmetrically arranged blades are fixedly connected between the two sets of connecting rods. One end of the miniature cylinder passes through the rectangular frame and is fixedly connected to one of the blades.

[0006] As a further improvement of this utility model, blade-stopping plates are fixedly connected to the inner walls of both sides of the rectangular frame located in front of the two blades.

[0007] As a further embodiment of this utility model: the pressing mechanism includes an electric push rod fixed to the rear side wall of the mounting base plate, one end of the electric push rod passing through the mounting base plate and fixedly connected to a pressing plate.

[0008] As a further improvement of this utility model, the front side wall of the pressing plate is fixedly connected with an anti-slip rubber pad.

[0009] As a further embodiment of this utility model: a support rod is fixedly connected to the lower side wall of the frame shell, and two symmetrically arranged sliding sleeves are sleeved on the support rod. A second connecting rod is fixedly connected to the upper side wall of each of the two sliding sleeves, and the upper ends of the two second connecting rods are respectively fixedly connected to the lower ends of the two clamping rollers.

[0010] As a further embodiment of this utility model, a PLC controller is fixedly connected to the rear side wall of the mounting base plate, and the PLC controller is electrically connected to the clamping mechanism, the film cutting mechanism and the pressing mechanism respectively.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by setting a clamping mechanism, when the stretch film is automatically cut, starts the micro motor to drive the bidirectional lead screw to rotate. At this time, the two nut blocks are forced to move towards each other, which can drive the two clamping rollers fixed to the two first connecting rods to move towards each other until they clamp the cut end of the stretch film and position it. This can prevent it from falling off during subsequent film cutting work so that it can continue to be wrapped and packaged.

[0012] 2. This utility model, by setting a film-cutting mechanism, when it is necessary to cut the stretch film, activates the micro cylinder to extend and pushes the blade fixed to it to move. At this time, since the turntable is hinged to the two pull rods, and the two pull rods are hinged to the two sliders, the two blades move close to each other. When the two blades are pressed together, the stretch film can be cut. Compared with the one-sided pushing cutting method, this structure has a more stable cutting effect on the stretch film. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional enlarged structural schematic diagram of the clamping mechanism of this utility model; Figure 3 This is a three-dimensional cross-sectional view of the clamping mechanism of this utility model; Figure 4 This is a three-dimensional enlarged structural schematic diagram of the membrane-breaking mechanism of this utility model; Figure 5 This is a schematic diagram of the right-side cross-sectional structure of the membrane-breaking mechanism of this utility model.

[0014] The correspondence between the labels and component names in the attached figures is as follows: 1. Mounting base plate; 2. Frame; 3. Micro motor; 4. Bidirectional lead screw; 5. Nut block; 6. First connecting rod; 7. Clamping roller; 8. U-shaped frame; 9. Rectangular frame; 10. Micro cylinder; 11. Cover; 12. Rotating shaft; 13. Turntable; 14. Pull rod; 15. Slider; 16. Connecting rod; 17. Blade; 18. Baffle plate; 19. Electric push rod; 20. Pressing plate; 21. Anti-slip pad; 22. Support rod; 23. Sliding sleeve; 24. Second connecting rod; 25. PLC controller. Detailed Implementation

[0015] Please see Figures 1-5This embodiment provides an automatic film-cutting device for a stretch wrapping machine, which includes a mounting base 1 fixedly connected to the film outlet end of the stretch wrapping machine. The mounting base 1 of this device is fixed to the fixing frame in the authorized patent for an automatic film-cutting device for a stretch wrapping machine (authorization number: CN219750289U). The other components do not need to be changed and can be based on existing technology. The front side wall of the mounting base 1 is provided with a clamping mechanism, a film-cutting mechanism and a pressing mechanism in sequence along the direction away from the film outlet end of the stretch wrapping machine. The clamping mechanism includes a frame shell 2 fixedly connected to the front side wall of the mounting base 1. A micro motor 3 is fixedly connected to the upper rear side of the frame shell 2. The main shaft end of the micro motor 3 passes through the frame shell 2 and is fixedly connected to a bidirectional lead screw 4. Two symmetrically arranged nut blocks are threaded on the bidirectional lead screw 4. 5. The lower walls of the two nut blocks 5 are fixedly connected to the first connecting rods 6. The lower end of each first connecting rod 6 extends to the inner side of the frame shell 2 and is fixedly connected to a clamping roller 7. When the stretch film is automatically cut, firstly, the micro motor 3 is started to work, driving the bidirectional lead screw 4 to rotate. Since the bidirectional lead screw 4 is threadedly connected to the two nut blocks 5 respectively, at this time, the two nut blocks 5 are forced to move towards each other, which can drive the two clamping rollers 7 fixed to the two first connecting rods 6 to move towards each other until the cut end of the stretch film is clamped and positioned. This can prevent it from falling off during subsequent film cutting work, so that it can continue to be used for wrapping and packaging. During subsequent wrapping and packaging, the micro motor 3 is started to reverse the operation, so that the two clamping rollers 7 lose the clamping effect on the stretch film, and the stretch film can continue to be conveyed, wrapped and packaged.

[0016] like Figure 4 and Figure 5 As shown: The membrane breaking mechanism includes a U-shaped frame 8 fixedly connected to the front wall of the mounting base plate 1. A rectangular frame 9 is fixedly connected to the front end of the U-shaped frame 8. A miniature cylinder 10 is fixedly connected to the middle of one side of the rectangular frame 9. Both the upper and lower ends of the rectangular frame 9 are connected to a cover 11. The inner wall of each cover 11 is rotatably connected to a turntable 13 via a rotating shaft 12. Two parallel pull rods 14 are hinged to both sides of the turntable 13. A slider 15 is hinged to the far end of each of the two pull rods 14. A connecting rod 16 is fixedly connected to the opposite side of each of the two sets of sliders 15. Two symmetrically arranged connecting rods 16 are fixedly connected between the two sets of connecting rods 16. One end of the miniature cylinder 10 passes through the rectangular frame 9 and is fixedly connected to one of the blades 17. When it is necessary to cut the stretch film, the miniature cylinder 10 is activated to extend, pushing the blade 17 fixed to it to move. At this time, since the turntable 13 is hinged to the two pull rods 14, and the two pull rods 14 are hinged to the two sliders 15, the two blades 17 move close to each other. When the two blades 17 are pressed together, the stretch film can be cut. When the miniature cylinder 10 retracts, the two blades 17 separate. Compared with the one-sided pushing and cutting method, this structure has a more stable cutting effect on the stretch film.

[0017] like Figure 4 As shown: On both sides of the inner wall of the rectangular frame 9 in front of the two blades 17, there are blade guards 18. When the wrapping film passes through the rectangular frame 9, it can prevent contact with the blade guards 18 and avoid the wrapping film from breaking.

[0018] like Figure 1 As shown: The clamping mechanism includes an electric push rod 19 fixed to the rear side wall of the mounting base plate 1. One end of the electric push rod 19 passes through the mounting base plate 1 and is fixedly connected to a pressing plate 20. When the film is broken, the electric push rod 19 is activated to extend and push the pressing plate 20 to press the broken part of the wrapping film until it is pressed against the packaged product, which can prevent the wrapping film from loosening at the broken part of the packaged product.

[0019] like Figure 1 As shown: The front side wall of the pressing plate 20 is fixedly connected with an anti-slip rubber pad 21, which can press the cut end of the stretch film tightly with the packaged goods.

[0020] like Figure 3 As shown: A support rod 22 is fixedly connected to the lower side wall of the frame shell 2. Two symmetrically arranged sliding sleeves 23 are sleeved on the support rod 22. The upper side walls of the two sliding sleeves 23 are fixedly connected to the second connecting rods 24. The upper ends of the two second connecting rods 24 are fixedly connected to the lower ends of the two clamping rollers 7 respectively. When the clamping rollers 7 are displaced, the sliding sleeves 23 fixed to the second connecting rods 24 are driven to slide on the support rod 22, which can support and stabilize the displacement of the clamping rollers 7.

[0021] like Figure 1 As shown: A PLC controller 25 is fixedly connected to the rear side wall of the mounting base plate 1. The PLC controller 25 is electrically connected to the clamping mechanism, the film cutting mechanism and the pressing mechanism respectively. It is easy to operate and has an external power supply. The circuit involved is existing technology and can be fully implemented by those skilled in the art, so there is no need to elaborate.

[0022] Working principle: When the stretch wrapping machine needs to automatically cut the film, the electric push rod 19 is activated and extended, pushing the pressing plate 20 to press the cut end of the stretch film until it is pressed against the packaged product, thus preventing the stretch film from loosening at the cut end. Then, the micro motor 3 is activated, driving the bidirectional lead screw 4 to rotate. Since the bidirectional lead screw 4 is threadedly connected to two nut blocks 5, the two nut blocks 5 are forced to move towards each other, which can drive the two clamping rollers 7, which are fixed to the two first connecting rods 6, to move towards each other until they clamp the cut end of the stretch film and position it, preventing it from loosening during subsequent film cutting, so that it can continue to be wrapped and packaged. Then, the micro cylinder 10 is activated and extended, pushing the blade 17 fixed to it to move. Since the turntable 13 is hinged to the two pull rods 14, and the two pull rods 14 are hinged to the two sliders 15, the two blades 17 move close to each other. When the two blades 17 are pressed together, the stretch film can be cut. Compared with the one-sided pushing and cutting method, this structure has a more stable cutting effect on the stretch film.

[0023] 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-cutting device for a stretch wrapping machine, comprising a mounting base plate (1) fixedly connected to the film outlet end of the stretch wrapping machine, characterized in that, The front sidewall of the mounting base (1) is provided with a clamping mechanism, a film cutting mechanism and a pressing mechanism in sequence along the direction away from the film outlet of the wrapping machine; the clamping mechanism includes a frame shell (2) fixedly connected to the front sidewall of the mounting base (1), a micro motor (3) is fixedly connected to the upper rear side of the frame shell (2), the main shaft end of the micro motor (3) passes through the frame shell (2) and is fixedly connected to a bidirectional lead screw (4), two symmetrically arranged nut blocks (5) are threaded on the bidirectional lead screw (4), and a first connecting rod (6) is fixedly connected to the lower wall of each of the two nut blocks (5), and the lower end of each first connecting rod (6) extends to the inner side of the frame shell (2) and is fixedly connected to a clamping roller (7).

2. The automatic film cutting device for a wrapping machine according to claim 1, characterized in that, The membrane breaking mechanism includes a U-shaped frame (8) fixedly connected to the front side wall of the mounting base (1). A rectangular frame (9) is fixedly connected to the front end of the U-shaped frame (8). A miniature cylinder (10) is fixedly connected to the middle of one side of the rectangular frame (9). A cover (11) is provided at both the upper and lower ends of the rectangular frame (9). A turntable (13) is rotatably connected to the inner wall of each cover (11) via a rotating shaft (12). Two parallel pull rods (14) are hinged to both sides of the turntable (13). A slider (15) is hinged to the far end of the two pull rods (14). A connecting rod (16) is fixedly connected to the opposite side of the two sets of sliders (15). Two symmetrically arranged blades (17) are fixedly connected between the two sets of connecting rods (16). One end of the miniature cylinder (10) passes through the rectangular frame (9) and is fixedly connected to one of the blades (17).

3. The automatic film-cutting device for a wrapping machine according to claim 2, characterized in that, Both sides of the inner walls of the rectangular frame (9) located in front of the two blades (17) are fixedly connected with blade guards (18).

4. The automatic film cutting device for a wrapping machine according to claim 1, characterized in that, The pressing mechanism includes an electric push rod (19) fixed to the rear side wall of the mounting base plate (1), one end of which passes through the mounting base plate (1) and is fixedly connected to a pressing plate (20).

5. The automatic film cutting device for a wrapping machine according to claim 4, characterized in that, The front side wall of the pressing plate (20) is fixedly connected with an anti-slip rubber pad (21).

6. The automatic film cutting device for a wrapping machine according to claim 1, characterized in that, A support rod (22) is fixedly connected to the lower side wall of the frame (2). Two symmetrically arranged sliding sleeves (23) are sleeved on the support rod (22). A second connecting rod (24) is fixedly connected to the upper side wall of each of the two sliding sleeves (23). The upper ends of the two second connecting rods (24) are respectively fixedly connected to the lower ends of the two clamping rollers (7).

7. The automatic film cutting device for a wrapping machine according to claim 1, characterized in that, A PLC controller (25) is fixedly connected to the rear side wall of the mounting base plate (1). The PLC controller (25) is electrically connected to the clamping mechanism, the film cutting mechanism and the pressing mechanism respectively.

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