Plastic film slitting mill

Abstract

The utility model discloses a plastic film slitting mill which comprises a rack and a fixing assembly. The upper end of the rack is rotationally connected with an upper supporting frame, the middle of the upper end of the rack and the middle of the upper supporting frame are rotationally connected with rolling-cutting shafts, and the outer arc faces of the rolling-cutting shafts are movably sleeved with rolling-cutting knives which are evenly distributed. The fixing assembly comprises fixing rings, a rotating shaft, a pressing block, a pressing ring and a groove, the number of the fixing rings is consistent with that of the hobbing cutters, the multiple fixing rings are movably connected to the outer arc faces of the two hobbing shafts in a sleeving mode respectively, and the fixing rings are fixedly connected with the hobbing cutters corresponding in the longitudinal direction; according to the plastic film slitting mill, a plastic film can conveniently penetrate through the plastic film slitting mill before cutting, meanwhile, the distance between the slitting cutters is easy to adjust, and the convenience of the plastic film slitting mill in use is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic film processing technology, specifically a plastic film roll cutting machine. Background Technology

[0002] Plastic packaging and plastic packaging products are taking up an increasingly larger share of the market, especially composite plastic flexible packaging, which is widely used in food, pharmaceutical, and chemical industries. Among these, food packaging accounts for the largest proportion, such as beverage packaging, frozen food packaging, retortable food packaging, and fast food packaging. These products have brought great convenience to people's lives. When using plastic film, it is often necessary to cut a sheet of film into a suitable width. Therefore, a roll cutter is needed to cut the plastic film. Existing plastic film roll cutters generally consist of a frame, a roll cutting shaft, and a roll cutting blade. The two roll cutting shafts are rotatably connected inside the frame, and the distance between them is not adjustable. As a result, the roll cutting blade will always be in a biting state, which is not conducive to the initial passage of plastic film. At the same time, the roll cutting blade is generally fixed to the roll cutting shaft by multiple bolts, making it difficult to adjust the position of the roll cutting blade. Therefore, the convenience of using plastic film roll cutting machines is generally limited. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a plastic film roll cutter. By rotating the upper support frame, the distance between the upper and lower roll cutters can be increased, which facilitates the passage of the plastic film before cutting. By rotating the worm gear, the three pressure blocks on the same roll cutter can be controlled to open or close synchronously, which facilitates the adjustment of the roll cutter distance and greatly improves the convenience of using the plastic film roll cutter. It can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a plastic film roll cutting machine, comprising a frame and a fixing assembly;

[0005] The frame is rotatably connected to an upper support frame. Both the middle of the upper end of the frame and the middle of the upper support frame are rotatably connected to a cutting shaft. The outer arc surface of the cutting shaft is movably fitted with evenly distributed cutting blades.

[0006] Fixed assembly: It includes fixed rings, rotating shafts, pressure blocks, pressure rings, and grooves. The number of fixed rings is the same as the number of roller cutters. Multiple fixed rings are movably sleeved on the outer arc surfaces of two roller cutting shafts. Each fixed ring is fixedly connected to the corresponding longitudinal roller cutter. Inside each fixed ring, three evenly distributed pressure blocks are rotatably connected via a rotating shaft. Pressure rings are rotatably connected to the outside of multiple fixed rings. Grooves corresponding to the pressure blocks are opened on the inner arc surface of the pressure rings. Inside each pressure ring, a worm gear is provided to control the rotation of the pressure ring. By rotating the upper support frame, the distance between the upper and lower roller cutters can be increased, facilitating the passage of the plastic film before cutting. By rotating the worm gear, the three pressure blocks on the same roller cutter can be controlled to open or close synchronously, thereby facilitating the adjustment of the roller cutter distance and greatly improving the convenience of using the plastic film roller cutter.

[0007] Furthermore, it also includes support rings, second positioning rings, and hexagonal sleeves. The support rings are arranged in pairs, and multiple sets of support rings are respectively set inside the pressure ring. Multiple support rings are rotatably connected to the worm inside the same pressure ring. The second positioning rings are respectively set at the rear end of the worm, and the hexagonal sleeves are respectively set at the front end of the worm. The outer arc surface of multiple fixing rings is provided with evenly distributed worm wheel grooves, and the worm wheel grooves are all meshed with the vertically adjacent worms to facilitate the control of the worm rotation.

[0008] Furthermore, each of the fixed rings is provided with a first positioning ring at the end away from the rolling cutter, and multiple pressure rings are located between the rolling cutter and the first positioning ring outside the same fixed ring, which facilitates the positioning of the pressure rings.

[0009] Furthermore, the upper surface of the frame is provided with two support corners on the rear side, both of which are configured to cooperate with the upper support frame to provide support and positioning for the upper support frame.

[0010] Furthermore, a positioning seat is provided on the left side of the upper surface of the frame, and a pin is movably inserted into the middle of the upper support frame. The middle of the pin passes through the upper end of the positioning seat, which facilitates the positioning of the upper support frame.

[0011] Furthermore, a locking seat is provided on the left side of the upper support frame, and an annular piece is provided at the front end of the outer arc surface of the pin. A notch corresponding to the locking seat is opened on the outer arc surface of the annular piece, and a handle is provided at the front end of the pin to facilitate the positioning of the pin.

[0012] Furthermore, a motor is provided on the right side of the frame, and the output shaft of the motor is fixedly connected to the lower rolling cutting shaft. Gears are provided at the right ends of both rolling cutting shafts, and the two gears are meshed together. A control switch is provided on the left side of the frame. The input end of the motor is electrically connected to the output end of the control switch, and the input end of the control switch is electrically connected to an external power source to facilitate driving the rotation of the rolling cutting shafts.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This plastic film roll cutter has the following advantages:

[0014] The upper roller cutting shaft is mounted on a rotatable upper support frame. Rotation can increase the distance between the upper and lower roller cutting blades, making it easier for the plastic film to pass through before cutting. At the same time, rotating the worm gear can control the three pressure blocks on the same roller cutting blade to open or close synchronously, which facilitates the adjustment of the roller cutting blade distance and greatly improves the convenience of using the plastic film roller cutting machine. Attached Figure Description

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

[0016] Figure 2 This is a cross-sectional view of the fixing component of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 4 This is an enlarged structural diagram of section B of the present invention.

[0019] In the diagram: 1. Frame, 2. Upper support frame, 3. Roller cutting shaft, 4. Roller cutting blade, 5. Fixing assembly, 51. Fixing ring, 52. Rotating shaft, 53. Pressure block, 54. Pressure ring, 55. Groove, 6. First positioning ring, 7. Worm gear, 8. Support ring, 9. Second positioning ring, 10. Hexagonal sleeve, 11. Support angle, 12. Positioning seat, 13. Pin, 14. Locking seat, 15. Annular piece, 16. Handle, 17. Gear, 18. Motor, 19. Control switch. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This embodiment provides a technical solution: a plastic film roll cutting machine, including a frame 1 and a fixing component 5;

[0022] Frame 1: An upper support frame 2 is rotatably connected to its upper end. The rear end of the upper support frame 2 is rotatably connected to the frame 1 via a connecting shaft. Guide rollers are rotatably connected to the front and rear sides of the upper end of the frame 1. The frame 1 provides support for other components. A cutting shaft 3 is rotatably connected to the middle of the upper end of the frame 1 and the middle of the upper support frame 2. Evenly distributed cutting blades 4 are movably sleeved on the outer arc surface of the cutting shaft 3. There are three or more cutting blades 4 on the same cutting shaft 3, preferably three. The cutting shaft 3 drives the cutting blades 4 to rotate. The two corresponding cutting blades 4 bite together to cut the plastic film.

[0023] Fixed component 5 includes a fixed ring 51, a rotating shaft 52, a pressure block 53, a pressure ring 54, and a groove 55. The number of fixed rings 51 is the same as the number of rolling cutters 4. Multiple fixed rings 51 are movably sleeved on the outer arc surfaces of two rolling shafts 3. Each fixed ring 51 is fixedly connected to the longitudinally corresponding rolling cutter 4. Inside each fixed ring 51, three evenly distributed pressure blocks 53 are rotatably connected via the rotating shaft 52. The outside of multiple fixed rings 51 is rotatably connected to pressure rings 54. The number of pressure rings 54 is the same as the number of fixed rings 51. A groove 55 corresponding to the pressure block 53 is opened on the inner arc surface of the pressure ring 54. The pressure ring 54 drives the groove 55 to move synchronously. The wall of the groove 55 slides relative to the end of the pressure block 53. The groove 55 is on the inner arc wall of the pressure block 53. As the pressure ring 54 rotates clockwise, it releases the pressure block 53, which in turn releases the cutting shaft 3, allowing the cutting blade 4 to move. When the pressure ring 54 rotates counterclockwise, it presses against the pressure block 53. The pressure block 53 rotates around the shaft 52 and presses against the cutting shaft 3. Consequently, the three pressure blocks 53 inside the same fixing ring 51 clamp the cutting shaft 3, locking the cutting blade 4. Each of the multiple pressure rings 54 has a worm gear 7 inside to control its rotation. The rings also include a support ring 8, a second positioning ring 9, and an inner hexagonal sleeve 10. The support rings 8 are arranged in groups of two, with multiple groups of support rings 8 located inside the pressure rings 54. All support rings 8 are rotatably connected to the worm gear 7 inside the same pressure ring 54, providing rotational support for the worm gear 7. The second positioning ring 9 is respectively set at the rear end of the worm 7, and the hexagonal sleeve 10 is respectively set at the front end of the worm 7. The second positioning ring 9 and the hexagonal sleeve 10 can restrict the longitudinal movement of the worm 7. The outer arc surface of the multiple fixed rings 51 is provided with evenly distributed worm wheel grooves. The worm wheel grooves are all engaged with the vertically adjacent worm 7. When the worm 7 is rotated by inserting an Allen wrench into the hexagonal sleeve 10, the worm 7 is engaged with the worm wheel groove on the fixed ring 51, and the pressure ring 54 and the fixed ring 51 will rotate relative to each other. The end of the fixed ring 51 away from the rolling cutter 4 is provided with a first positioning ring 6. The multiple pressure rings 54 are all located between the rolling cutter 4 and the first positioning ring 6 outside the same fixed ring 51. The rear side of the upper surface of the frame 1 is provided with two support corners 11. The support angles 11 are all configured to cooperate with the upper support frame 2. When the upper support frame 2 is rotated, the upper support frame 2 drives the upper cutting shaft 3 to move away from above the lower cutting shaft 3, and the upper and lower cutting blades 4 separate from each other. Then, the two support angles 11 support the upper support frame 2. A positioning seat 12 is provided on the left side of the upper surface of the frame 1. A pin 13 is movably inserted into the middle of the upper support frame 2. The middle of the pin 13 passes through the upper end of the positioning seat 12. A locking seat 14 is provided on the left side of the upper support frame 2. An annular piece 15 is provided at the front end of the outer arc surface of the pin 13. A notch corresponding to the locking seat 14 is opened on the outer arc surface of the annular piece 15. A handle 16 is provided at the front end of the pin 13. A motor 18 is provided on the right side of the frame 1. The output shaft of the motor 18 is fixedly connected to the lower cutting shaft 3.Both rolling cutting shafts 3 have gears 17 on their right ends, which mesh together. A control switch 19 is located on the left side of the frame 1. The input of the motor 18 is electrically connected to the output of the control switch 19, and the input of the control switch 19 is electrically connected to an external power source. Adjusting the control switch 19 activates the motor 18, which in turn rotates the lower rolling cutting shaft 3. The lower rolling cutting shaft 3, through the two meshing gears 17, drives the upper rolling cutting shaft 3 to rotate in the opposite direction, allowing for continuous rolling cutting of the moving plastic film.

[0024] The working principle of the plastic film rolling cutter provided by this utility model is as follows: During use, the pin 13 is rotated via the handle 16. The pin 13 drives the annular plate 15 to rotate. After the notch on the outer arc surface of the annular plate 15 aligns with the locking seat 14, the longitudinal movement of the pin 13 is no longer restricted. Then, the pin 13 is pulled to the left, and it moves out of the locking seat 14. The rotation of the upper support frame 2 is then unrestricted, allowing the upper support frame 2 to rotate. The upper support frame 2 drives the upper rolling cutter 3 to move away from above the lower rolling cutter 3, separating the upper and lower rolling cutters 4. Then, the two support angles 11 support the upper support frame 2, thereby enabling... The cutting blades 4 on the cutting shaft 3 are exposed, and the spacing of the cutting blades 4 can be adjusted. During adjustment, an Allen wrench is inserted into the Allen socket 10 to rotate the worm gear 7. The worm gear 7 engages with the worm wheel groove on the fixed ring 51, causing the pressure ring 54 and the fixed ring 51 to rotate relative to each other. The pressure ring 54 drives the groove 55 to move synchronously, and the wall of the groove 55 slides relative to the end of the pressure block 53. The depth of the groove 55 on the inner arc wall of the pressure block 53 increases from shallow to deep. Therefore, when the pressure ring 54 rotates clockwise, it releases the pressure block 53, which then releases the cutting shaft 3, allowing the cutting blades 4 to move. When rotated counterclockwise, the pressure block 53 is squeezed. The pressure block 53 rotates around the rotating shaft 52 and squeezes the rolling cutter 3. As a result, the three pressure blocks 53 inside the same fixing ring 51 clamp the rolling cutter 3, locking the rolling cutter 4. Then, the plastic film is passed between the upper and lower rolling cutters 4. After passing through, the support frame 2 is rotated to reset. The upper rolling cutter 4 and the lower rolling cutter 4 are misaligned and aligned. At the same time, the two gears 17 are meshed. Then, the pin 13 is inserted through the positioning seat 12. The notch on the outer arc surface of the annular piece 15 corresponds to the locking seat 14. The annular piece 15 is moved to the right end of the locking seat 14. Then, the pin 13 is rotated by hand. With the handle 16 and notch facing downwards, the upper end of the annular piece 15 will be engaged inside the locking seat 14, restricting the movement of the pin 13. Then, the external unwinding machine unwinds the plastic film, and the rewinding machine unwinds and rewinds the plastic film, causing the plastic film to move longitudinally between the upper and lower roller cutters 4. At the same time, the control switch 19 is adjusted, the motor 18 is turned on, and the motor 18 drives the lower roller cutter 3 to rotate. The lower roller cutter 3 drives the upper roller cutter 3 to rotate in the opposite direction through two meshing gears 17. The roller cutter 3 drives the roller cutter 4 to rotate, and the two corresponding upper and lower roller cutters 4 mesh to cut the plastic film.

[0025] It is worth noting that the motor 18 disclosed in the above embodiments can be freely configured according to the actual application scenario. The motor 18 can be a servo motor with the model number ECMA-C20604RS. The control switch 19 is equipped with a switch button corresponding to the motor 18 for controlling its switching operation.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A plastic film roll cutting machine, characterized in that: Includes a frame (1) and a mounting assembly (5); The upper end of the frame (1) is rotatably connected to the upper support frame (2). The middle part of the upper end of the frame (1) and the middle part of the upper support frame (2) are rotatably connected to the rolling cutter shaft (3). The outer arc surface of the rolling cutter shaft (3) is movably sleeved with evenly distributed rolling cutters (4). Fixed component (5): It includes a fixed ring (51), a rotating shaft (52), a pressure block (53), a pressure ring (54), and a groove (55). The number of fixed rings (51) is the same as the number of rolling cutters (4). Multiple fixed rings (51) are movably sleeved on the outer arc surface of two rolling shafts (3). The fixed rings (51) are all fixedly connected to the longitudinally corresponding rolling cutters (4). The interior of each fixed ring (51) is rotatably connected to three evenly distributed pressure blocks (53) through the rotating shaft (52). The exterior of multiple fixed rings (51) is rotatably connected to pressure rings (54). The inner arc surface of the pressure ring (54) is provided with a groove (55) corresponding to the pressure block (53). The interior of multiple pressure rings (54) is provided with a worm gear (7) to control the rotation of the pressure ring (54).

2. The plastic film roll cutting machine according to claim 1, characterized in that: It also includes a support ring (8), a second positioning ring (9) and an inner hexagonal sleeve (10). The support rings (8) are arranged in pairs, and multiple sets of support rings (8) are respectively set inside the pressure ring (54). Multiple support rings (8) are rotatably connected to the worm (7) inside the same pressure ring (54). The second positioning rings (9) are respectively set at the rear end of the worm (7), and the inner hexagonal sleeves (10) are respectively set at the front end of the worm (7). The outer arc surface of multiple fixing rings (51) is provided with evenly distributed worm wheel grooves, and the worm wheel grooves are all meshed with the vertically adjacent worm (7).

3. A plastic film roll cutting machine according to claim 1, characterized in that: Each of the fixed rings (51) is provided with a first positioning ring (6) at the end away from the rolling cutter (4), and multiple pressure rings (54) are located between the rolling cutter (4) and the first positioning ring (6) outside the same fixed ring (51).

4. A plastic film roll cutting machine according to claim 1, characterized in that: The upper surface of the frame (1) is provided with two support corners (11) on the rear side, and both support corners (11) are configured to cooperate with the upper support frame (2).

5. A plastic film roll cutting machine according to claim 1, characterized in that: A positioning seat (12) is provided on the left side of the upper surface of the frame (1), and a pin (13) is movably inserted into the middle of the upper support frame (2), with the middle of the pin (13) penetrating the upper end of the positioning seat (12).

6. A plastic film roll cutting machine according to claim 5, characterized in that: The upper support frame (2) has a locking seat (14) on its left side, and an annular piece (15) is provided at the front end of the outer arc surface of the pin (13). A notch corresponding to the locking seat (14) is opened on the outer arc surface of the annular piece (15), and a handle (16) is provided at the front end of the pin (13).

7. A plastic film roll cutting machine according to claim 1, characterized in that: The right side of the frame (1) is provided with a motor (18), the output shaft of the motor (18) is fixedly connected to the lower rolling shaft (3), and the right end of the two rolling shafts (3) is provided with a gear (17), the two gears (17) are meshed and connected, the left side of the frame (1) is provided with a control switch (19), the input end of the motor (18) is electrically connected to the output end of the control switch (19), and the input end of the control switch (19) is electrically connected to an external power source.

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