Device for producing PVC (Polyvinyl Chloride) thermal recovery film

Abstract

The utility model relates to the technical field of hot-rolled film processing devices, and particularly discloses a PVC hot-rolled film production device which comprises a mounting plate, a feeding roller, a cutting mechanism and a winding roller, the feeding roller, the cutting mechanism and the winding roller are sequentially arranged on the mounting plate in the longitudinal direction, and a guide limiting mechanism is further arranged between the feeding roller and the winding roller. The guide limiting mechanism comprises two guide rollers arranged in the vertical direction and a stand column used for installing the guide rollers. A plastic film penetrates through the position between the two guide rollers, and the two guide limiting mechanisms are symmetrically distributed on the two sides of the cutting mechanism. Each cutting mechanism comprises a base and a supporting rod, the two cutting mechanisms are symmetrically arranged along the transverse center line of the mounting plate, the bases are slidably connected with the mounting plate, and the mounting plate is further provided with a width adjusting mechanism used for driving the bases to move in the transverse direction. The device aims at solving the problem that the trimming size of an existing PVC trimming device is not accurate due to front-back height change, and therefore the trimming effect is affected.

Description

Technical Field

[0001] This utility model relates to the technical field of heat-shrinkable film processing equipment, and in particular to an equipment for producing PVC heat-shrinkable film. Background Technology

[0002] PVC (polyvinyl chloride) material was developed in the early 20th century. With the development of the plastics industry, PVC heat shrink film gradually emerged as a packaging material. Due to its good transparency, tight-fitting shrinkage properties, and certain physical protective properties, PVC heat shrink film has been widely used in many industries such as food, beverages, and daily necessities. During film processing and production, depending on the area to be used and the application field, it needs to be rolled and stored, or cut or trimmed.

[0003] Existing trimming devices typically include a feed roller and a take-up roller, with a trimming cutter positioned between them. However, due to the lightweight nature of plastic film, wrinkles easily form during transport, leading to inaccurate dimensions during trimming and affecting the film cutting quality. Secondly, while a large amount of plastic film is initially wound onto the feed roller during the initial feeding phase, the amount of film on the roller decreases significantly in the later trimming stages. This reduction in thickness and height causes inconsistent height of the film as it passes the trimming cutter, resulting in inaccurate dimensions and impacting the trimming effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, the present invention provides a device for producing PVC heat-shrinkable film, which solves the problem that existing PVC trimming devices suffer from inaccurate trimming dimensions due to changes in front and back height, thus affecting the trimming effect.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: A device for producing PVC heat-shrinkable film, including a mounting plate, and a feeding roller, a cutting mechanism, and a winding roller arranged sequentially along the longitudinal direction on the mounting plate. A guide limiting mechanism is also provided between the feeding roller and the winding roller. The guide limiting mechanism includes two guide rollers arranged in the vertical direction and a column for mounting the guide rollers. The plastic film passes through the two guide rollers. Two guide limiting mechanisms are provided and symmetrically distributed on both sides of the cutting mechanism. The cutting mechanism includes a base, a support rod, a cutting blade with the upper end of the support rod, and a first motor for driving the cutting blade. Two cutting mechanisms are symmetrically arranged along the transverse centerline of the mounting plate. The base is slidably connected to the mounting plate. The mounting plate is also provided with a width adjustment mechanism for driving the base to move laterally along the feeding direction.

[0006] The technical principle and beneficial effects of this solution are as follows: The PVC plastic film on the feeding roller passes through the guide roller of the left-side guide limiting mechanism and then through the cutting mechanism. The cutting blade of the cutting mechanism trims the edges of the PVC plastic film. After trimming, the PVC plastic film passes through the guide roller of the right-side guide limiting mechanism and then enters the winding roller, where it is collected. The guide limiting mechanisms on both sides of the cutting mechanism, with their guide rollers at the same horizontal height, ensure that the plastic film at the cutting blade is kept at the same horizontal level, preventing dimensional inaccuracies due to inconsistent height during trimming. Furthermore, the guide rollers further tension, flatten, and guide the plastic film during transport, minimizing wrinkles and ensuring dimensional accuracy during trimming.

[0007] Furthermore, the width adjustment mechanism includes a second motor and a screw with a slider arranged laterally. The slider is threadedly connected to the screw, and the slider is connected to the base of the cutting mechanism through a first connecting rod. Two screws are symmetrically arranged along the transverse centerline of the mounting plate, and each of the two screws has a driven bevel gear at one end that is close to each other. The second motor is arranged longitudinally, and the output shaft of the second motor is connected to a driving bevel gear, which meshes with the two driven bevel gears.

[0008] By controlling the forward and reverse rotation of the second motor, the two sliders on the two screws move towards each other or away from each other, thereby bringing the two cutting mechanisms closer or further apart. This allows for width adjustment between the two cutting mechanisms, making the device suitable for trimming plastic films of different widths. Alternatively, by adjusting the width between the two cutting mechanisms, the cutting blade can slit the plastic film, cutting it into multiple strips of the required width.

[0009] Furthermore, the driven roller includes a drum and a baffle that is slidably connected to the drum. Two baffles are symmetrically arranged along the longitudinal centerline of the drum. The slider is connected to the baffle through a second connecting rod, which is connected to the side of the baffle away from the plastic film.

[0010] When the slider moves, it drives the baffle to move through the second linkage. This allows the width of the cutting mechanism to be adjusted simultaneously with the width of the winding mechanism. As a result, the trimmed plastic film can be limited by the baffle on the winding roller, making it less likely for the plastic film to shift during winding, keeping the winding neat, and eliminating the need to manually adjust the position of the baffle on the winding roller again.

[0011] Furthermore, both the uprights and support rods are electrically telescopic rods that can be raised and lowered vertically. The electrically telescopic rods facilitate adjustment of the height of the guide and limiting mechanism to accommodate different needs for trimming plastic film.

[0012] Furthermore, a fixed base is fixedly connected to the upper end of the upright, and an adjusting column is provided on the fixed base. An adjusting plate is slidably connected to the adjusting column. Of the two guide rollers, the upper guide roller is rotatably connected to the adjusting plate, and the lower guide roller is rotatably connected to the fixed base. The adjusting column is threaded and threadedly connected to a limit nut. By moving the position of the adjusting plate, the gap between the two guide rollers can be changed, thereby accommodating plastic films of different thicknesses. After the height is adjusted, the adjusting plate is limited in height by the limit nut.

[0013] Furthermore, the bottom of the mounting plate is equipped with an anti-slip pad. The anti-slip pad makes it easier to place the equipment in a fixed position and prevents it from sliding. Attached Figure Description

[0014] Figure 1 This is a front view of the device.

[0015] Figure 2 This is a top view of the device.

[0016] Figure 3 This is a schematic diagram of the guide and limiting mechanism in Example 2. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The reference numerals in the accompanying drawings include: mounting plate 1, feeding roller 2, column 3, guide roller 31, fixed base 32, adjusting plate 33, adjusting column 34, limit nut 35, base 4, support rod 41, cutting blade 42, first motor 43, screw 5, slider 51, first connecting rod 52, second connecting rod 53, second motor 54, driven bevel gear 55, driving bevel gear 56, take-up roller 6, and baffle 61.

[0019] Example 1 is basically as shown in the appendix. Figure 1 , Figure 2As shown: A PVC heat-shrink film production apparatus includes a mounting plate 1, and a feeding roller 2, a cutting mechanism, and a winding roller 6 arranged longitudinally on the mounting plate 1. A guide limiting mechanism is also provided between the feeding roller 2 and the winding roller 6. The guide limiting mechanism includes two guide rollers 31 arranged vertically, and a column 3 for mounting the guide rollers 31. The plastic film passes between the two guide rollers 31. There are two guide limiting mechanisms, symmetrically distributed on both sides of the cutting mechanism. The cutting mechanism includes a base 4, a support rod 41, a cutting blade 42 with the upper end of the support rod 41, and a first motor 43 for driving the cutting blade 42. Two cutting mechanisms are symmetrically arranged along the transverse centerline of the mounting plate 1. The base 4 is slidably connected to the mounting plate 1. The mounting plate 1 is also provided with a width adjustment mechanism for driving the base 4 to move laterally. Both the column and the support rod 41 are electric telescopic rods that can be raised and lowered vertically. The height of the guide limiting mechanism can be easily adjusted by the electric telescopic rod to adapt to different needs of plastic film trimming.

[0020] In use, the PVC plastic film on the feeding roller 2 passes through the guide roller 31 of the left-side guide limiting mechanism and then through the cutting mechanism. The cutting blade 42 of the cutting mechanism trims the edges of the PVC plastic film. After trimming, the PVC plastic film passes through the guide roller 31 of the right-side guide limiting mechanism and then enters the winding roller 6, where it is collected. The guide limiting mechanisms on both sides of the cutting mechanism, with the guide rollers 31 of both mechanisms at the same horizontal height, ensure that the plastic film at the point where it passes the cutting blade 42 is kept at the same horizontal height. This prevents inaccurate dimensions due to inconsistent height during trimming. Furthermore, the guide rollers 31 further tension, flatten, and guide the plastic film during transport from the feeding roller 2 to the winding roller 6, minimizing wrinkles and ensuring dimensional accuracy during trimming.

[0021] The width adjustment mechanism includes a second motor 54 and a screw 5 with a slider 51 arranged laterally. The slider 51 is threadedly connected to the screw 5. The slider 51 is connected to the base 4 of the cutting mechanism through a first connecting rod 52. Two screws 5 are symmetrically arranged along the transverse centerline of the mounting plate 1. Each of the two screws 5 has a driven bevel gear 55 at one end that is close to the other. The second motor 54 is arranged longitudinally, and the output shaft of the second motor 54 is connected to a driving bevel gear 56. The driving bevel gear 56 meshes with the two driven bevel gears 55. The second motor 54 is a stepper motor. The rotation of the second motor 54 drives the active bevel gear 56 to rotate, which in turn drives the bevel gear to rotate, causing the screw 5 to rotate. This causes the slider 51 to move laterally along the screw 5. The first connecting rod 52 connected to the slider 51 drives the cutting mechanism to move. The forward and reverse rotation of the second motor 54 controls the two sliders 51 on the two screws 5 to move towards each other or away from each other, thereby bringing the two cutting mechanisms closer or further apart. This allows for width adjustment between the two cutting mechanisms, making the device suitable for trimming plastic films of different widths. Furthermore, by adjusting the width between the two cutting mechanisms, the cutting blade 42 can be used to cut the plastic film into multiple strips of the required width.

[0022] like Figure 3 The parts of Embodiment 2 that are the same as those in Embodiment 1 will not be repeated. The difference is that a fixed base 32 is welded to the upper end of the upright, and an adjusting column 34 is welded to the fixed base 32 along the vertical direction. An adjusting plate 33 is slidably connected to the adjusting column 34. The upper guide roller 31 is rotatably connected to the adjusting plate 33, and the lower guide roller 31 is rotatably connected to the fixed base 32. The adjusting column 34 is threaded and threadedly connected to a limit nut 35. By moving the position of the adjusting plate 33, the gap between the two guide rollers 31 can be changed, thereby adapting to the use of plastic films of different thicknesses. After the height of the adjusting plate 33 is adjusted, the height is limited by the limit nut 35. An anti-slip pad is provided at the bottom of the mounting plate 1, which makes it easy to place the equipment in a fixed position and prevents it from sliding.

[0023] The driven roller includes a drum and a baffle 61 slidably connected to the drum. Two baffles 61 are symmetrically arranged along the longitudinal centerline of the drum. A slider 51 is connected to the baffle 61 via a second connecting rod 53, which is connected to the side of the baffle 61 away from the plastic film. When the slider 51 moves, it simultaneously drives the baffle 61 to move via the second connecting rod 53. This allows for simultaneous adjustment of the width of the cutting mechanism and the width of the winding mechanism, ensuring that the trimmed plastic film is limited by the baffle 61 on the winding roller 6. This prevents the plastic film from shifting during winding, maintaining a neat winding, and eliminates the need for manual adjustment of the baffle 61 position on the winding roller 6.

[0024] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An apparatus for producing PVC heat-shrinkable film, comprising a mounting plate, and a feeding roller, a cutting mechanism, and a winding roller arranged sequentially along the longitudinal direction on the mounting plate, characterized in that: A guide limiting mechanism is also provided between the feeding roller and the winding roller. The guide limiting mechanism includes two guide rollers arranged in a vertical direction and a column for mounting the guide rollers. The plastic film passes through the two guide rollers. There are two guide limiting mechanisms, which are symmetrically distributed on both sides of the cutting mechanism. The cutting mechanism includes a base, a support rod, a cutting blade with the upper end of the support rod, and a first motor for driving the cutting blade. There are two cutting mechanisms symmetrically arranged along the transverse centerline of the mounting plate. The base is slidably connected to the mounting plate. The mounting plate is also provided with a width adjustment mechanism for driving the base to move transversely along the feeding direction.

2. The apparatus for producing PVC heat-shrinkable film according to claim 1, characterized in that: The width adjustment mechanism includes a second motor and a screw with a slider arranged laterally. The slider is threadedly connected to the screw. The slider is connected to the base of the cutting mechanism through a first connecting rod. Two screws are symmetrically arranged along the transverse centerline of the mounting plate. Each of the two screws has a driven bevel gear at one end that is close to the other. The second motor is arranged longitudinally, and the output shaft of the second motor is connected to a driving bevel gear. The driving bevel gear meshes with the two driven bevel gears.

3. The apparatus for producing PVC heat-shrinkable film according to claim 2, characterized in that: The take-up roller includes a roller and a baffle that is slidably connected to the roller. Two baffles are symmetrically arranged along the longitudinal centerline of the roller. The slider is connected to the baffle through a second connecting rod, which is connected to the side of the baffle away from the plastic film.

4. The apparatus for producing PVC heat-shrinkable film according to claim 1, characterized in that: Both the columns and support rods are electrically operated telescopic rods that can be raised and lowered vertically.

5. The apparatus for producing PVC heat-shrinkable film according to claim 1, characterized in that: The upper end of the column is fixedly connected to a fixed base, the fixed base is provided with an adjusting column, and the adjusting column is slidably connected to an adjusting plate. Of the two guide rollers, the upper guide roller is rotatably connected to the adjusting plate, and the lower guide roller is rotatably connected to the fixed base. The adjusting column is threaded and is threadedly connected to a limit nut.

6. The apparatus for producing PVC heat-shrinkable film according to claim 1, characterized in that: The mounting plate has an anti-slip pad on its bottom.

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