Edge cutting device for plastic film processing

Abstract

The utility model discloses an edge cutting device for plastic film processing. The edge cutting device comprises two supporting plates. The driving roller is rotationally arranged at one ends of the two supporting plates through buckles, and two cutters are symmetrically arranged between the two supporting plates; the rotating shafts are fixedly arranged in the inner holes of the corresponding cutters in a penetrating mode through nuts, and adjusting mechanisms are arranged in the supporting plates and used for adjusting the distance between the cutters and the driving roller. In the using process of the improved plastic film edge cutting device, along with edge cutting treatment of a plastic film, plastic film waste can be pulled away from a film roll in time, winding of the plastic film is completed, the plastic film waste cannot be scattered, collection and recycling of the plastic film waste are facilitated, and due to the fact that the plastic film waste is pulled away from the film roll in time, the plastic film waste can be recycled conveniently. And the cutter almost does not abut against the film roll, so that the plastic film on the film roll is prevented from deforming to influence the cutting effect of the plastic film.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic film trimming devices, and more particularly to a plastic film trimming device for processing. Background Technology

[0002] Plastic film is a thin film made primarily from polymeric synthetic materials. These polymeric synthetic materials typically include resins such as polyethylene, polypropylene, polyvinyl chloride, polyester, and polystyrene. After these resins are uniformly mixed on plastic molding machinery, they are molded into films with a certain thickness, width, and length through a molding process. The films have a smooth, flat, and flexible surface.

[0003] In the current production process of some plastic films, after the plastic film is rolled into a roll, an edge trimming operation is performed to make the ends of the roll flatter for easy sale. The roll is usually fixed on a drive roller, and then the sides of the roll are trimmed by a rotating cutter. Due to the contact between the cutter and the plastic film, the plastic film at the trimming point may deform, thus affecting the trimming effect. In addition, after the plastic film is trimmed, the waste plastic film may scatter, making it inconvenient to collect and reuse. Utility Model Content

[0004] The purpose of this invention is to provide a trimming device for processing plastic film, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a trimming device for processing plastic film, comprising two support plates;

[0006] Also includes:

[0007] A drive roller is rotatably mounted on one end of two support plates via a snap-fit ​​mechanism, and two cutters are symmetrically arranged between the two support plates.

[0008] The rotating shaft is fixedly inserted into the inner hole of the corresponding cutter by a nut. The support plate is provided with an adjustment mechanism for adjusting the distance between the cutter and the drive roller.

[0009] Preferably, the opposing surfaces of the two cutters are planar, and the other side of the cutter is in clearance fit with the corresponding support plate.

[0010] Preferably, the rotating shaft includes a threaded shaft, a hexagonal rod, and a take-up roller. The hexagonal rod is disposed between the corresponding threaded shaft and the corresponding take-up roller, and one end of the hexagonal rod is rotatably connected to one end of the corresponding take-up roller. The other end of the hexagonal rod is fixedly connected to the corresponding threaded shaft, and the outer peripheral wall of the hexagonal rod is in contact with the inner hole of the corresponding cutter.

[0011] Preferably, the adjusting mechanism includes a slider and a piston rod. A cross hole is provided on the support plate, and the slider is slidably installed in the corresponding cross hole. The other end of the take-up roller is rotatably connected to one side of the corresponding slider. A piston cylinder is fixedly installed on the other end of the support plate. One end of the piston rod is slidably installed in the corresponding piston cylinder, and the other end of the piston rod is fixedly inserted into the corresponding slider. An air pump is fixedly installed on the other end of the support plate, and the air pump is located below the piston cylinder. The exhaust end of the air pump is connected to the air injection end of the corresponding piston cylinder through a connecting pipe.

[0012] Preferably, the slider is provided with two guide rods that slide through it, and both ends of each guide rod are fixedly connected to the inner wall of the corresponding cross hole.

[0013] Preferably, the support plate is provided with a driving mechanism for driving the take-up roller to rotate;

[0014] The driving mechanism includes an impeller, and a circular groove is provided on the other side of the slider. The circular groove is located between two corresponding guide rods. An air guide hole is provided at the axial position of the piston rod, and the interior of the piston cylinder is connected to the interior of the corresponding circular groove through the corresponding air guide hole. The impeller is located in the corresponding circular groove, and one side of the impeller is fixedly connected to the other end of the corresponding take-up roller through a connecting rod. A pressure limiting valve is fixedly installed in the opening of the circular groove, and the other side of the impeller is clearance-fitted with the pressure limiting valve.

[0015] This utility model has the following beneficial effects:

[0016] During use, this improved plastic film trimming device can promptly remove plastic film waste from the film roll as the plastic film is trimmed, and complete the film rewinding. The plastic film waste will not scatter, facilitating its collection and reuse. Furthermore, because the plastic film waste is promptly removed from the film roll, the cutter will hardly come into contact with the film roll, thus avoiding deformation of the plastic film on the roll that could affect the cutting effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the overall structure of this utility model;

[0019] Figure 2 This is a perspective view of the overall structure of the support plate and cutter of this utility model;

[0020] Figure 3 This is a perspective view of the internal structure of the support plate of this utility model;

[0021] Figure 4 This is a perspective view of the internal structure of the cutter, rotating shaft, and slider of this utility model;

[0022] Figure 5 This is a perspective view of the overall structure of the rotating shaft and impeller of this utility model;

[0023] Figure 6 This is a front view of the internal structure of the slider and piston cylinder of this utility model.

[0024] In the diagram: 1. Support plate; 2. Drive roller; 3. Cutter; 4. Rotating shaft; 41. Threaded shaft; 42. Hexagonal rod; 43. Take-up roller; 5. Adjustment mechanism; 51. Cross hole; 52. Slider; 53. Piston cylinder; 54. Piston rod; 55. Air pump; 56. Guide rod; 6. Drive mechanism; 61. Circular groove; 62. Air guide hole; 63. Impeller; 64. Pressure relief valve. Detailed Implementation

[0025] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] This utility model provides a technical solution: (Refer to...) Figure 1 - Figure 6 The present invention discloses a trimming device for processing plastic film, comprising two support plates 1;

[0027] Also includes:

[0028] A drive roller 2 is rotatably mounted on one end of two support plates 1 via a snap-fit ​​mechanism, and two cutters 3 are symmetrically arranged between the two support plates 1.

[0029] The rotating shaft 4 is fixedly inserted into the inner hole of the corresponding cutter 3 by a nut. The support plate 1 is provided with an adjustment mechanism 5 for adjusting the distance between the cutter 3 and the drive roller 2.

[0030] In this embodiment, when using the improved plastic film trimming device, please refer to... Figure 1 - Figure 3 As shown, first remove the buckle from the support plate 1, then move the drive roller 2 to place the film roll in the middle position of the drive roller 2, and then fix the drive roller 2 back to the support plate 1 through the buckle. (The support plate 1 is fixedly equipped with a driver consisting of a housing, a motor and a gear set, which is used to drive the drive shaft to rotate. The drive end of the driver is connected to the drive roller 2 through a snap-fit ​​mechanism, such as a coupling or a square tube with a square rod).

[0031] Please refer to Figure 1 - Figure 4 As shown, after the membrane roll is installed, the driver drives the membrane roll to rotate at a constant speed through the drive rod. Then, the adjustment mechanism 5 pushes the cutter 3 towards the membrane roll through the rotating shaft 4. Due to the mutual contact between the cutter 3 and the membrane roll, the plastic film on the membrane roll can be cut sequentially as the membrane roll rotates. When the plastic film is partially cut, the device stops operating. Then, the end of the plastic film waste is fixed to the rotating shaft 4 with tape or adhesive. The device is restarted. As the plastic film is cut, the plastic film waste is directly wound onto the rotating shaft 4. The plastic film waste will not scatter, which facilitates the collection and reuse of plastic film waste. Moreover, since the plastic film waste is promptly removed from the membrane roll, the cutter 3 will hardly come into contact with the membrane roll, thereby avoiding deformation of the plastic film on the membrane roll that would affect the cutting effect of the plastic film.

[0032] In a further preferred embodiment of this utility model, such as Figure 1 As shown, the opposite surfaces of the two cutters 3 are planar, and the other side of the cutter 3 is fitted with the corresponding support plate 1 with a clearance.

[0033] In this embodiment, please refer to Figure 1 As shown, the two cutters 3 are arranged on opposite sides of the plane, so that the cutters 3 will not collide with the membrane roll when they are misaligned.

[0034] In a further preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the rotating shaft 4 includes a threaded shaft 41, a hexagonal bar 42, and a take-up roller 43. The hexagonal bar 42 is disposed between the corresponding threaded shaft 41 and the corresponding take-up roller 43, and one end of the hexagonal bar 42 is rotatably connected to one end of the corresponding take-up roller 43. The other end of the hexagonal bar 42 is fixedly connected to the corresponding threaded shaft 41, and the outer peripheral wall of the hexagonal bar 42 is in contact with the inner hole of the corresponding cutter 3.

[0035] In this embodiment, please refer to Figure 4 and Figure 5 As shown, when the cutter 3 comes into contact with the film roll, the cutter 3, the threaded shaft 41 and the hexagonal rod 42 can rotate together with the film roll due to the mutual contact between the cutter 3 and the film roll, thereby avoiding the cutter 3 from rubbing against the plastic film and causing deformation and damage to the cut edge of the plastic film.

[0036] When removing the plastic film waste from the take-up roller 43, the operator unscrews the nut from the threaded shaft 41 to engage the clamping and positioning of the cutter 3. Then, the cutter 3 is pulled away from the rotating shaft 4 to remove it from the hexagonal rod 42, thus completing the disassembly of the cutter 3. At this point, the plastic film waste can be directly removed from the take-up roller 43. The device is easy to operate.

[0037] In a further preferred embodiment of this utility model, such as Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the adjustment mechanism 5 includes a slider 52 and a piston rod 54. A cross hole 51 is provided on the support plate 1, and the slider 52 is slidably installed in the corresponding cross hole 51. The other end of the take-up roller 43 is rotatably connected to one side of the corresponding slider 52. A piston cylinder 53 is fixedly installed on the other end of the support plate 1. One end of the piston rod 54 is slidably installed in the corresponding piston cylinder 53, and the other end of the piston rod 54 is fixedly inserted into the corresponding slider 52. An air pump 55 is fixedly installed on the other end of the support plate 1, and the air pump 55 is located below the piston cylinder 53. The exhaust end of the air pump 55 is connected to the air injection end of the corresponding piston cylinder 53 through a connecting pipe.

[0038] In this embodiment, please refer to Figure 3 , Figure 4 and Figure 6 As shown, during the trimming operation of the plastic film, the air pump 55 is started to draw in external gas at a uniform speed and inject the gas into the piston cylinder 53 through the connecting pipe. As the air pressure in the piston cylinder 53 increases, a thrust is applied to the piston rod 54 in the direction of the film roll. The piston rod 54 then pushes the cutter 3 towards the film roll until the cutter 3 and the film roll come into contact. The contact force between the cutter 3 and the film roll can be adjusted by the air pressure in the piston cylinder 53 to avoid excessive contact force between the cutter 3 and the film roll affecting the cutting process of the plastic film.

[0039] In a further preferred embodiment of this utility model, such as Figure 3 As shown, two guide rods 56 are installed in the slider 52, and both ends of each guide rod 56 are fixedly connected to the inner wall of the corresponding cross hole 51.

[0040] In this embodiment, please refer to Figure 3 As shown, during the sliding process of slider 52 within the cross groove, due to the mutual contact between guide rod 56 and slider 52, slider 52 slides along a linear trajectory within the cross groove.

[0041] In a further preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the support plate 1 is equipped with a drive mechanism 6, which is used to drive the take-up roller 43 to rotate.

[0042] The drive mechanism 6 includes an impeller 63, a circular groove 61 on the other side of the slider 52, and the circular groove 61 is located between two corresponding guide rods 56. An air guide hole 62 is provided at the axial position of the piston rod 54, and the interior of the piston cylinder 53 is connected to the interior of the corresponding circular groove 61 through the corresponding air guide hole 62. The impeller 63 is located in the corresponding circular groove 61, and one side of the impeller 63 is fixedly connected to the other end of the corresponding take-up roller 43 through a connecting rod. A pressure limiting valve 64 is fixedly installed in the opening of the circular groove 61, and the other side of the impeller 63 is clearance-fitted with the pressure limiting valve 64.

[0043] In this embodiment, please refer to Figure 4 - Figure 6 As shown, during the process of the air pump 55 injecting gas into the piston cylinder 53, some gas flows into the circular groove 61 along the air guide hole 62, so that the circular groove 61 and the piston cylinder 53 simultaneously form a high-pressure chamber of corresponding degree. When the pressure in the high-pressure chamber reaches the threshold, due to the sufficient pressure difference generated at both ends of the pressure limiting valve 64, the excess gas in the circular groove 61 flows out of the circular groove 61 through the pressure limiting valve 64. During the process of the gas flowing into the pressure limiting valve 64, it blows onto the impeller 63, and the impeller 63 applies an axial thrust to the take-up roller 43 to drive the take-up roller 43 to rotate. There is no need to set up an additional drive structure, which reduces the production cost of the device. Moreover, the driving force of the airflow on the take-up roller 43 has a limit, and the plastic film waste will not break or tear due to excessive winding force of the take-up roller 43 on the plastic film waste.

[0044] Working principle: When using this improved plastic film trimming device, first unscrew the bolt from the buckle to remove the buckle from the support plate 1, so as to contact the constraint positioning between the drive roller 2 and the support plate 1. Then, by moving the drive roller 2, the film roll is placed in the middle position of the drive roller 2, and the drive roller 2 is fixed back to the support plate 1 by the buckle. (The support plate 1 is fixedly equipped with a driver consisting of a housing, a motor and a gear set, which is used to drive the drive shaft to rotate).

[0045] After the membrane roll is installed, the air pump 55 starts to draw in external gas at a constant speed and injects the gas into the piston cylinder 53 through the connecting pipe. Some of the gas in the piston cylinder 53 flows into the circular groove 61 through the air guide hole 62. As the air pressure in the piston cylinder 53 and the circular groove 61 increases, a thrust is applied to the piston rod 54 in the direction of the membrane roll. The piston rod 54 then pushes the cutter 3 to move in the direction of the membrane roll until the cutter 3 and the membrane roll come into contact. At this time, due to the contact between the cutter 3 and the membrane roll, the piston rod 54 can no longer slide out of the piston cylinder 53. The air pressure in the circular groove 61 increases further. After the pressure difference across the pressure relief valve 64 reaches the threshold, the excess air in the circular groove 61 and the piston cylinder 53 is discharged through the pressure relief valve 64. During the process of the gas flowing into the pressure relief valve 64, it blows onto the impeller 63. The impeller 63 applies an axial thrust to the take-up roller 43 to drive the take-up roller 43 to rotate.

[0046] After the take-up roller 43 is started, the operator manually pushes the film roll to rotate two revolutions or drives the film roll to rotate two revolutions through the driver to complete the trimming operation of a small amount of plastic film on the outside of the film roll. Then, the end of the plastic film waste is fixed to the take-up roller 43 with tape or adhesive. Then, the driver is started to drive the film roll to rotate at a constant speed. The cutter 3 gradually completes the trimming of the plastic film on the film roll. At the same time, the position of the cutter 3 is adjusted synchronously by the gas continuously injected into the piston cylinder 53 by the air pump 55 to push the piston rod 54, so as to avoid insufficient contact force between the plastic film and the cutter 3 to complete the trimming of the plastic film. At the same time, the rapid rotation of the take-up roller 43 can synchronously and in real time roll the side of the cut plastic film onto the take-up roller 43.

[0047] It should be noted that after all the plastic film waste cut off from the film roll is wound onto the winding roller 43, the winding roller 43 can stop rotating in time because the pulling of the plastic film waste offsets the axial thrust on the winding roller 43, and will not tear the plastic film on the film roll.

[0048] After the trimming of the plastic film on the film roll is completed, the device stops operating. Then, unscrew the nut from the threaded shaft 41 to engage the clamping and positioning of the cutter 3. Pull the cutter 3 away from the rotating shaft 4 to remove it from the hexagonal rod 42, completing the disassembly of the cutter 3. At this point, the plastic film waste can be directly removed from the take-up roller 43. After the plastic film waste is collected, the operator pushes the slider 52 back to its original position via the rotating shaft 4 to remove excess air from the circular groove 61 and piston cylinder 53. Excess gas can flow out through the pressure relief valve 64, or be extracted from the piston cylinder 53 and the circular groove 61 by the air pump 55. Then, the operator puts the cutter 3 back on the hexagonal rod 42. Due to the mutual contact between the outer wall of the hexagonal rod 42 and the inner wall of the cutter 3, the angle between the cutter 3 and the hexagonal rod 42 remains stable. Finally, the nut is screwed back onto the threaded shaft 41, which can constrain and limit the cutter 3 on the hexagonal rod 42. By repeating the above operation, the edge trimming operation of the plastic film on the film roll can be completed continuously.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A trimming device for processing plastic film, comprising two support plates (1); Its features are, Also includes: A drive roller (2) is mounted on one end of two support plates (1) by means of a snap fastener, and two cutters (3) are symmetrically arranged between the two support plates (1); The rotating shaft (4) is fixedly inserted into the inner hole of the corresponding cutter (3) by a nut. The support plate (1) is provided with an adjustment mechanism (5) for adjusting the distance between the cutter (3) and the drive roller (2).

2. The edge trimming device for processing plastic film according to claim 1, characterized in that: The two cutting blades (3) are arranged in a planar shape on opposite sides, and the other side of the cutting blade (3) is fitted with the corresponding support plate (1) with a clearance.

3. The edge trimming device for processing plastic film according to claim 2, characterized in that: The rotating shaft (4) includes a threaded shaft (41), a hexagonal rod (42), and a take-up roller (43). The hexagonal rod (42) is located between the corresponding threaded shaft (41) and the corresponding take-up roller (43), and one end of the hexagonal rod (42) is rotatably connected to one end of the corresponding take-up roller (43). The other end of the hexagonal rod (42) is fixedly connected to the corresponding threaded shaft (41), and the outer peripheral wall of the hexagonal rod (42) is in contact with the inner hole of the corresponding cutter (3).

4. The edge trimming device for processing plastic film according to claim 3, characterized in that: The adjustment mechanism (5) includes a slider (52) and a piston rod (54). A cross hole (51) is provided on the support plate (1), and the slider (52) is slidably installed in the corresponding cross hole (51). The other end of the take-up roller (43) is rotatably connected to one side of the corresponding slider (52). A piston cylinder (53) is fixedly installed on the other end of the support plate (1). One end of the piston rod (54) is slidably installed in the corresponding piston cylinder (53), and the other end of the piston rod (54) is fixedly inserted into the corresponding slider (52). An air pump (55) is fixedly installed on the other end of the support plate (1), and the air pump (55) is located below the piston cylinder (53). The exhaust end of the air pump (55) is connected to the air injection end of the corresponding piston cylinder (53) through a connecting pipe.

5. The edge trimming device for processing plastic film according to claim 4, characterized in that: The slider (52) is equipped with two guide rods (56) that slide through it, and both ends of each guide rod (56) are fixedly connected to the inner wall of the corresponding cross hole (51).

6. The edge trimming device for processing plastic film according to claim 5, characterized in that: The support plate (1) is provided with a drive mechanism (6) for driving the take-up roller (43) to rotate; The drive mechanism (6) includes an impeller (63), and a circular groove (61) is provided on the other side of the slider (52). The circular groove (61) is located between two corresponding guide rods (56). An air guide hole (62) is provided at the axial position of the piston rod (54). The interior of the piston cylinder (53) is connected to the interior of the corresponding circular groove (61) through the corresponding air guide hole (62). The impeller (63) is located in the corresponding circular groove (61). One side of the impeller (63) is fixedly connected to the other end of the corresponding take-up roller (43) through a connecting rod. A pressure limiting valve (64) is fixedly installed in the opening of the circular groove (61). The other side of the impeller (63) is clearance-fitted with the pressure limiting valve (64).

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