Film drawing mechanism

Abstract

The utility model provides a film drawing mechanism. The problems that an existing device usually only uses one set of film pulling assembly to drive a rolled film to advance for a long distance, the stroke of the film from a film roll to a formed bag is too long, the weight of the film is heavy, the power is obviously insufficient when one set of film pulling assembly is used for driving, and film walking is not smooth are solved. A film feeding assembly, a first film pulling assembly, a second film pulling assembly and a cutter assembly used for cutting off a rolled film are sequentially arranged on a machine frame in the film feeding direction, and a sealing mechanism used for sealing the rolled film is arranged between the first film pulling assembly and the second film pulling assembly. The roll film is driven to move through the first film pulling assembly and the second film pulling assembly which are arranged in front of and behind the sealing mechanism, the roll film is evenly stressed in the overall moving process, the film pulling process is smoother, and the stability of the finished product quality is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to a film stretching mechanism. Background Technology

[0002] With economic development, people's demands for products extend beyond quality to include packaging. Good packaging attracts more consumers. However, most packaging requires outer film, which needs to be stretched by a film-pulling assembly during its journey. Existing equipment typically uses only one set of film-pulling assemblies to drive the film a considerable distance. The journey from the film roll to the formed bag is too long, and the film itself is heavy. Using only one set of film-pulling assemblies results in insufficient power and uneven film movement. There are areas for improvement in the existing technology. Summary of the Invention

[0003] In view of the above-mentioned existing situation, this utility model provides a film pulling mechanism, including a frame. A film roll for feeding film is provided on one side of the frame. A film feeding assembly, a first film pulling assembly, a second film pulling assembly, and a cutter assembly for cutting film are sequentially arranged on the frame along the film feeding direction. A sealing mechanism for sealing film is provided between the first film pulling assembly and the second film pulling assembly. At least one set of film pressing assembly for pressing film is provided on the film feeding assembly, the first film pulling assembly, and the second film pulling assembly.

[0004] Preferably, the first film-pulling assembly is used for pulling the film longitudinally, the second film-pulling assembly is used for feeding the film transversely, and the first film-pulling assembly and the second film-pulling assembly are located at a bend in the film movement path.

[0005] Preferably, the film feeding assembly, the first film pulling assembly, and the second film pulling assembly each include a rotating roller rotatably mounted on the frame. A power source is provided on one side of the rotating roller to drive the rotating roller to rotate and move the film. The power source is fixedly mounted on the side wall of the frame, and the aforementioned film pressing assembly is positioned opposite the rotating roller.

[0006] Preferably, the pressing assembly includes a bracket fixedly mounted on a frame, on which a movable frame is movably mounted facing the rotating roller, and the movable frame is provided with a plurality of rollers for pressing against the rotating roller, the axial direction of the rollers being parallel to the axial direction of the rotating roller.

[0007] Preferably, a cylinder for driving the movable frame to move in the direction of the rotating frame is fixedly installed on the bracket.

[0008] Preferably, the second film-stretching assembly is provided with two sets of film-pressing assemblies, the two sets of film-pressing assemblies being located above the rotating roller of the second film-stretching assembly and on the side of the rotating roller away from the first film-stretching assembly.

[0009] Preferably, on the second film stretching assembly, on the side away from the first film stretching assembly, there are two guide plates between the pressure film assembly and the first film stretching assembly for guiding the film and extending downward, and a guide groove is left between the two guide plates for the film to pass through.

[0010] Preferably, a film holder for mounting film rolls is fixedly provided on the lower end of the frame away from the film feeding assembly.

[0011] Preferably, a plurality of guide rollers for guiding the film are fixedly installed inside the frame, and a tension roller for tensioning the film is movably arranged between the plurality of guide rollers. The guide rollers and the tension roller are located between the film feeding assembly and the first film pulling assembly.

[0012] Preferably, the frame sidewall is provided with a tensioning component for adjusting the height position of the tensioning roller, and the frame side away from the tensioning component is provided with a slot for engaging the tensioning roller.

[0013] Preferably, a film-stopping assembly for clamping and fixing the film is provided above the cutter assembly. The film-stopping assembly includes two opposing clamping plates for clamping the film. The clamping plates move towards the other clamping plate under the drive of a cylinder and clamp the film.

[0014] Compared with the prior art, the present invention uses a first film-pulling assembly and a second film-pulling assembly set before and after the sealing mechanism to drive the film to move. The film is subjected to uniform force during the overall movement, the film-pulling process is smoother, and the stability of the finished product quality is effectively guaranteed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure in the direction of the second membrane stretching assembly;

[0017] Figure 3 This is a schematic diagram of the structure at the first membrane assembly;

[0018] Figure 4 This is a schematic diagram of the structure at the second membrane assembly;

[0019] Figure 5 This is a side view of the present invention.

[0020] The diagram shows the following components: 1. Frame; 2. Film roll; 3. Film feeding assembly; 4. First film pulling assembly; 5. Second film pulling assembly; 6. Cutting assembly; 7. Sealing mechanism; 8. Film pressing assembly; 9. Guide roller; 10. Tensioning roller; 11. Rotating roller; 12. Power source; 13. Support; 14. Movable frame; 15. Roller; 16. Cylinder; 17. Guide plate; 18. Guide groove; 19. Film frame; 20. Tensioning assembly; 21. Slot; 22. Clamping plate; 23. Film stopping assembly; 24. Film. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0022] like Figure 1-5 As shown, a film-pulling mechanism includes a frame 1. A film roll 2 for feeding film 24 is disposed on one side of the frame 1. A film holder 19 for mounting the film roll 2 is fixedly disposed on the lower end of the frame 1 away from the aforementioned film feeding assembly 3. Along the film feeding direction 24, the frame 1 is sequentially arranged with a film feeding assembly 3, a first film-pulling assembly 4, a second film-pulling assembly 5, and a cutter assembly 6 for cutting the film 24. The first film-pulling assembly 4 is used to pull the film 24 longitudinally, and the second film-pulling assembly 5 is used to feed the film 24 transversely. The first film-pulling assembly 4 and the second film-pulling assembly 5 are located at a right-angle turn on the film 24's movement path. Above the cutter assembly 6 is a film-stopping assembly 23 for clamping and fixing the film 24. The film-stopping assembly 23 includes two opposing clamping plates 22 for clamping the film 24. The clamping plates 22 move towards the other clamping plate 22 under the drive of a cylinder 16 to clamp the film 24. A sealing mechanism 7 for sealing the film 24 is movably disposed between the first film-pulling assembly 4 and the second film-pulling assembly 5. At least one set of film-pressing assemblies 8 for pressing the film 24 is disposed on the film-feeding assembly 3, the first film-pulling assembly 4, and the second film-pulling assembly 5. A plurality of guide rollers 9 for guiding the film 24 are fixedly disposed inside the frame 1. A tensioning roller 10 for tensioning the film 24 is movably disposed between the plurality of guide rollers 9. The guide rollers 9 and the tensioning roller 10 are located between the film-feeding assembly 3 and the first film-pulling assembly 4. A tensioning assembly 20 for adjusting the height of the tensioning roller 10 is disposed on the side wall of the frame 1. A slot 21 for engaging the tensioning roller 10 is provided on the side of the frame 1 away from the tensioning assembly 20. The tension of the film 24 during the film-pulling process can be easily adjusted by adjusting the height of the tensioning roller 10. The film 24 is driven to move by the first film-pulling assembly 4 and the second film-pulling assembly 5 set before and after the sealing mechanism 7. The film 24 is subjected to uniform force during the overall movement, and the film-pulling process is smoother, which effectively ensures the stability of the finished product quality. Furthermore, by setting the sealing mechanism 7 between the first film-pulling assembly 4 and the second film-pulling assembly 5, the overall layout of the equipment is more reasonable and compact.

[0023] The film feeding assembly 3, the first film pulling assembly 4, and the second film pulling assembly 5 each include a rotating roller 11 rotatably mounted on the frame 1. A power source 12, which drives the rotating roller 11 to rotate and moves the film 24, is provided on one side of the rotating roller 11. The power source 12 is fixedly mounted on the side wall of the frame 1, and the film pressing assembly 8 is directly opposite the rotating roller 11. The power source 12 is a motor. The film pressing assembly 8 includes a bracket 13 fixedly mounted on the frame 1. A movable frame 14, directly opposite the rotating roller 11, is movably mounted on the bracket 13. Multiple rollers 15 are mounted on the movable frame 14 for pressing against the rotating roller 11. The axial direction of the rollers 15 is parallel to the axial direction of the rotating roller 11. A cylinder 16 is fixedly mounted on the bracket 13 for driving the movable frame 14 to move towards the rotating frame. After being pulled from the film roll 2 and passing through the film feeding assembly 3, the film 24 sequentially passes through the guide roller 9 and the tension roller 10 before entering the first film pulling assembly 4. It is then heat-sealed by the sealing mechanism 7, passes through the second film pulling assembly 5, and is clamped and fixed by the film stopping assembly 23. Finally, the film 24 is cut by the cutting assembly 6. During the film's movement, the film 24 is pressed against the rotating roller 11 by the roller 15 to prevent jumping, thus ensuring greater stability during film movement.

[0024] The second film-pulling assembly 5 is provided with two sets of film-pressing assemblies 8. The two sets of film-pressing assemblies 8 are respectively located above the rotating roller 11 of the second film-pulling assembly 5 and on the side of the rotating roller 11 away from the first film-pulling assembly 4. Two guide plates 17 are provided between the film-pressing assembly 8 on the side of the second film-pulling assembly 5 away from the first film-pulling assembly 4 and the first film-pulling assembly 4 to guide the film 24 and extend downward. A guide groove 18 is left between the two guide plates 17 for the film 24 to pass through. The film-pressing assembly 8 located on the side of the rotating roller 11 away from the first film-pulling assembly 4 and the guide plate 17 below guide the laterally moving film 24, so that the film 24 moves downward smoothly after changing direction and enters the film-stopping assembly 23.

[0025] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications to the specification derived therefrom are still within the protection scope of this utility model.

Claims

1. A film-stretching mechanism, comprising a frame (1), wherein a film roll (2) for supplying film (24) is provided on one side of the frame (1), characterized in that, The frame (1) is provided with a film feeding assembly (3), a first film pulling assembly (4) and a second film pulling assembly (5) in sequence along the film feeding (24) direction. A sealing mechanism (7) for sealing the film (24) is provided between the first film pulling assembly (4) and the second film pulling assembly (5). At least one set of film pressing assembly (8) for pressing the film (24) is provided on the film feeding assembly (3), the first film pulling assembly (4) and the second film pulling assembly (5).

2. The film stretching mechanism according to claim 1, characterized in that, The first film-pulling assembly (4) is used to pull the film (24) longitudinally, and the second film-pulling assembly (5) is used to feed the film (24) transversely. The first film-pulling assembly (4) and the second film-pulling assembly (5) are located at the turning point on the moving path of the film (24).

3. The film stretching mechanism according to claim 2, characterized in that, The film feeding assembly (3), the first film pulling assembly (4) and the second film pulling assembly (5) each include a rotating roller (11) rotatably mounted on the frame (1). A power source (12) is provided on one side of the rotating roller (11) to drive the rotating roller (11) to rotate and move the film (24). The power source (12) is fixedly mounted on the side wall of the frame (1), and the film pressing assembly (8) is directly opposite the rotating roller (11).

4. A film stretching mechanism according to claim 3, characterized in that, The pressing assembly (8) includes a bracket (13) fixedly mounted on the frame (1). A movable frame (14) is movably mounted on the bracket (13) facing the rotating roller (11). A plurality of rollers (15) are mounted on the movable frame (14) for pressing against the rotating roller (11). The axial direction of the rollers (15) is parallel to the axial direction of the rotating roller (11).

5. A film stretching mechanism according to claim 4, characterized in that, A cylinder (16) for driving the movable frame (14) to move in the direction of the rotating frame is fixedly installed on the bracket (13).

6. A film stretching mechanism according to claim 4, characterized in that, The second film-pulling assembly (5) is provided with two sets of film-pressing assemblies (8). The two sets of film-pressing assemblies (8) are respectively located above the rotating roller (11) of the second film-pulling assembly (5) and on the side of the rotating roller (11) away from the first film-pulling assembly (4).

7. A film stretching mechanism according to claim 6, characterized in that, On the second film-pulling assembly (5), on the side away from the first film-pulling assembly (4), there are two guide plates (17) for guiding the film (24) and extending downward. A guide groove (18) is left between the two guide plates (17) for the film (24) to pass through.

8. A film stretching mechanism according to claim 1, characterized in that, A film frame (19) for mounting film roll (2) is fixedly provided on the side of the lower end of the frame (1) away from the film feeding assembly (3). Several guide rollers (9) for guiding the film (24) are fixedly provided inside the frame (1). A tensioning roller (10) for tensioning the film (24) is movably arranged between the multiple guide rollers (9). The guide roller (9) and the tensioning roller (10) are located between the film feeding assembly (3) and the first film pulling assembly (4).

9. A film stretching mechanism according to claim 8, characterized in that, The frame (1) is provided with a tensioning component (20) for adjusting the height position of the tensioning roller (10) on its side wall. The frame (1) is provided with a slot (21) for engaging the tensioning roller (10) on the side away from the tensioning component (20).

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