A leveling device for plastic film processing

Abstract

The utility model relates to the technical field of plastic film processing equipment discloses a kind of levelling devices for plastic film processing, including leveller and cover top cover being equipped in leveller top. Top cover inner wall is equipped with anti-wrinkle mechanism, and anti-wrinkle mechanism includes electric jar, fixed column, sliding plate, slide bar, push plate, fixed rod one and frame block. Electric jar drives sliding plate to slide in frame block, and the displacement groove obliquely arranged in sliding plate drives slide bar to move transversely, to drive push plate to unfold or contract on the outer wall of fixed rod one, and the film is stretched transversely. Closed mechanism is equipped between leveller front end and top cover outside, and closed mechanism includes fixed block, rotating rod, buckling rotating block and fixed rod two, and is connected by buckling rotating block and fixed rod two. The utility model effectively eliminates film wrinkle by anti-wrinkle mechanism, improves levelling quality, and closed mechanism stabilizes internal heating environment, enhances the sealing property of device, improves levelling efficiency and product qualification rate.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic film processing equipment, and in particular to a leveling device for plastic film processing. Background Technology

[0002] Plastic films are widely used in modern industrial production, especially in packaging, printing, and composite materials. During the production or post-processing of plastic films, such as extrusion molding, coating, or thermoforming, thermal or mechanical stresses are generated within the film, leading to unevenness on the film surface and affecting its performance. Therefore, leveling equipment is typically used to heat and stretch the film to eliminate stress and improve its flatness.

[0003] In existing leveling processes, plastic films are typically guided through a heated zone. However, the physical properties of plastic films (especially thinner ones) make them highly sensitive when subjected to the combined effects of heat and traction. During transport, uneven tension control or inconsistent localized thermal expansion can easily cause the film's lateral edges or central area to lose its stability, resulting in wrinkles or arching.

[0004] Wrinkles generated during the heat leveling process are a major cause of product quality degradation. Once wrinkles form, they are difficult to completely eliminate even in subsequent cooling and setting processes, resulting in surface defects in the final product. This severely affects the optical and mechanical properties of the film, reduces yield, and increases production costs. Existing leveling equipment often lacks an effective mechanism for applying active, lateral stretching to the film within the heating zone, making it difficult to fundamentally prevent wrinkle formation.

[0005] Therefore, this utility model proposes a leveling device for plastic film processing to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a leveling device for plastic film processing, which aims to improve the problem that some existing leveling devices for plastic film processing are prone to wrinkling during the film heating and leveling process, resulting in damage to product quality.

[0007] This utility model provides a leveling device for processing plastic film, including a leveling machine and a top cover installed on the top of the leveling machine.

[0008] The inner wall of the top cover is equipped with an anti-wrinkle mechanism. This mechanism includes a drive assembly, a slide rod, a push plate, a fixing rod, and a frame block. The drive assembly includes an electric cylinder, a fixing column, and a sliding plate. The electric cylinder is fixedly connected to the inner wall of the top cover, its output end is fixedly connected to the fixing column, and the bottom end of the fixing column is fixedly connected to the sliding plate. The frame block is fixedly connected to the inner wall of the top cover, and the fixing rod is fixedly connected to the inner side of the frame block. The sliding plate is slidably connected to the inner side of the frame block, and its interior has an inclined displacement groove. One end of the slide rod is slidably connected to the inner side of the displacement groove, and the other end is fixedly connected to the push plate. The push plate is slidably connected to the outer wall of the fixing rod.

[0009] Furthermore, when the electric cylinder drives the sliding plate to move, the sliding rod, guided by the displacement groove, drives the push plate to move along the fixed rod, thereby achieving lateral stretching of the plastic film and effectively preventing wrinkles from forming during the leveling process. This design precisely converts the linear reciprocating motion of the electric cylinder into the lateral unfolding and contracting motion of the push plate, providing dynamic leveling support for the plastic film.

[0010] Preferably, the leveling device for plastic film processing further includes a sealing mechanism, which is located between the front end of the leveling machine and the outer side of the top cover, for reinforcement and sealing when the top cover is closed. The sealing mechanism includes a fixing block, a rotating rod, a clamping rotating block, and a second fixing rod. Through the coordinated action of the components, the stability of the internal heating environment of the leveling machine is ensured.

[0011] Preferably, the fixing block is fixedly connected to the outside of the top cover to provide support for the rotating rod. The rotating rod is rotatably connected to the fixing block, and the clamping rotating block is fixedly connected to the outer wall of the rotating rod, so that the clamping rotating block can rotate about the rotating rod as an axis.

[0012] Preferably, the second fixing rod is fixedly connected to the front end of the leveling machine, serving as the locking point of the clamping rotating block. The inner side of the clamping rotating block has a slot that mates with the second fixing rod. When the top cover is closed, the clamping rotating block rotates via the rotating rod and engages with the outer wall of the second fixing rod, forming a firm mechanical lock, thereby effectively reinforcing the top cover and preventing heat loss.

[0013] Preferably, the frame block has a U-shaped structure with its opening facing downwards. This structural design allows the sliding plate to slide stably within it. The two ends of the first fixing rod are fixedly connected to opposite sides of the inner wall of the frame block, providing precise guidance for the push plate. The sliding plate is located between the first fixing rod and the inner top wall of the frame block. This structure restricts the vertical degree of freedom of the sliding plate, further improving its sliding stability.

[0014] Preferably, the shifting grooves are distributed in a figure-eight or V-shape on the sliding plate. This geometric design is key to achieving the unfolding and retraction of the pusher plate. The shifting grooves can precisely drive the slide rods connected in different shifting grooves to move the pusher plates closer or further apart, thereby adapting to films of different widths or flattening requirements.

[0015] Preferably, the side of the push plate away from the slide bar is designed as a smooth arc surface. This smooth and rounded surface design can minimize friction with the plastic film and effectively prevent the film surface from being scratched or worn during the leveling process. A guide hole is provided on the inner side of the push plate for the fixed rod to pass through. The guide hole slides with the fixed rod to ensure the smoothness and accuracy of the push plate during the unfolding and retracting movement.

[0016] Preferably, multiple anti-wrinkle mechanisms are arranged at intervals along the length of the top cover, and all multiple anti-wrinkle mechanisms are located above the leveling machine. This multi-group collaborative design can provide comprehensive lateral stretching coverage for wider plastic films, ensuring the uniformity and thoroughness of the leveling effect.

[0017] Preferably, the electric cylinder is fixedly connected to the inner top wall of the top cover by bolts, and the telescopic axis of the electric cylinder is parallel to the sliding direction of the sliding plate. This installation method allows the driving force of the electric cylinder to act on the sliding plate most directly and effectively, reducing energy loss and ensuring the response speed and working accuracy of the anti-wrinkle mechanism.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problem of wrinkles easily generated in plastic films during the heating and leveling process in the prior art by setting an anti-wrinkle mechanism composed of an electric cylinder, a sliding plate, a sliding rod and a push plate. It achieves the technical effect of dynamically stretching the film laterally, effectively eliminating wrinkles and greatly improving the leveling quality.

[0019] 2. This utility model solves the problem of insufficient reinforcement and sealing of the top cover of the leveling machine in the prior art by setting a closed mechanism composed of a fixed block, a rotating rod, a clamping rotating block and a second fixed rod. It achieves the technical effects of quickly locking the top cover, enhancing the sealing between the top cover and the machine body, and stabilizing the internal heating environment.

[0020] 3. This utility model solves the problem of unclear transmission logic of the variable pitch mechanism in the prior art by setting the displacement groove of the sliding plate to an inclined figure-eight or V-shaped structure, and achieves the technical effect of efficiently converting linear motion into lateral unfolding and contraction motion, reliable transmission, and uniform unfolding force. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a leveling device for processing plastic film according to the present invention; Figure 2 This is a schematic diagram of the slide bar of a leveling device for plastic film processing proposed in this utility model; Figure 3 This is a schematic diagram of the structure of the fixing rod 2 of the leveling device for plastic film processing proposed in this utility model.

[0022] Legend: 1. Leveling machine; 2. Top cover; 3. Anti-wrinkle mechanism; 31. Drive assembly; 311. Electric cylinder; 312. Fixed column; 313. Sliding plate; 32. Slide rod; 33. Push plate; 34. Fixed rod one; 35. Frame block; 4. Closing mechanism; 41. Fixing block; 42. Rotating rod; 43. Clamping rotating block; 44. Fixing rod two. Detailed Implementation

[0023] Example: Reference Figures 1 to 3 This utility model provides a leveling device for processing plastic film, which aims to solve the problem that plastic film is prone to wrinkles during the heating and leveling process, affecting product quality.

[0024] like Figure 1 As shown, the device includes a leveling machine 1 and a top cover 2 covering the top of the leveling machine 1. The leveling machine 1 serves as the main platform of the entire device, used to carry plastic film for conveying, heating, and leveling operations. The top cover 2 is used to enclose the working area of ​​the leveling machine 1 to ensure the stability of the internal heating environment.

[0025] To address the issue of film wrinkling, an anti-wrinkle mechanism 3 is provided on the inner wall of the top cover 2. The anti-wrinkle mechanism 3 includes a drive assembly 31, a slide bar 32, a push plate 33, a fixing rod 34, and a frame block 35.

[0026] The drive assembly 31 is the power source for the anti-wrinkle mechanism 3, and includes an electric cylinder 311, a fixed column 312, and a sliding plate 313. The electric cylinder 311 is bolted to the inner wall of the top cover 2. The output end of the electric cylinder 311 is fixedly connected to the fixed column 312, which drives the fixed column 312 to reciprocate along the axial direction. The bottom end of the fixed column 312 is fixedly connected to the sliding plate 313. The extension axis of the electric cylinder 311 is parallel to the sliding direction of the sliding plate 313, ensuring effective transmission of driving force.

[0027] The frame block 35 is fixedly connected to the inner wall of the top cover 2. A fixing rod 34 is fixedly connected to the inner side of the frame block 35. The fixing rod 34 is used to guide and limit the movement of the push plate 33. The sliding plate 313 is slidably connected to the inner side of the frame block 35. The sliding plate 313 has an inclined displacement groove inside. The displacement groove is distributed in a figure-eight or V shape. This is the key structure for realizing the expansion and contraction of the push plate 33. Through the inclined displacement groove, the driving of the sliding plate 313 in the linear direction can be converted into the lateral movement of the slide rod 32.

[0028] One end of the slide rod 32 is slidably connected to the inner side of the displacement groove, and the other end of the slide rod 32 is fixedly connected to the push plate 33. The two sides of the push plate 33 are slidably connected to the outer wall of the fixed rod 34, and are used to perform lateral pushing and pulling movements on the film surface. When the electric cylinder 311 drives the slide plate 313 to move, the displacement groove guides the slide rod 32, forcing the slide rod 32 to move laterally, thereby causing the push plates 33 to move closer or further apart, achieving the stretching and leveling effect on the plastic film.

[0029] It also includes a closing mechanism 4, and the closing mechanism 4 forms a specific locking structure and connection relationship with the aforementioned leveling machine 1 and top cover 2.

[0030] Reference Figure 1 and Figure 3 The closing mechanism 4 includes a fixed block 41, a rotating rod 42, a clamping rotating block 43, and a second fixed rod 44. The second fixed rod 44 has a cylindrical rod structure and is fixedly connected to the outer wall of the front end of the leveling machine 1. The second fixed rod 44 serves as a force anchor point during locking and is used to be fastened by the clamping rotating block 43. The fixed block 41 has a base structure with a rotating shaft hole and is fixedly connected to the outer wall of the top cover 2. The rotating rod 42 is rotatably connected in the rotating shaft hole of the fixed block 41, providing a rotation center for the clamping rotating block 43.

[0031] The snap-fitting block 43 is fixedly connected to the outer wall of the rotating rod 42. The snap-fitting block 43 has an L-shaped or hook-shaped profile, and the inner side of the snap-fitting block 43 is provided with a slot for accommodating and locking the second fixing rod 44.

[0032] In the assembled and operational state, when the top cover 2 is placed on the leveling machine 1, the clamping rotating block 43 is located outside or above the fixing rod 44. By manually pulling the clamping rotating block 43, it rotates around the fixing block 41 with the rotating rod 42, causing the slot of the clamping rotating block 43 to move towards the fixing rod 44 and finally engage with the outer circumference of the fixing rod 44. The tight engagement between the slot of the clamping rotating block 43 and the fixing rod 44 applies downward pressure to the top cover 2, ensuring high stability and sealing between the top cover 2 and the leveling machine 1, and providing a stable environment for internal heating and leveling.

[0033] The frame block 35 has a U-shaped structure with its opening facing downwards. The two ends of the fixing rod 34 are fixedly connected to opposite sides of the inner wall of the frame block 35, forming two parallel guide rods. The sliding plate 313 is located between the fixing rod 34 and the inner top wall of the frame block 35. This ensures the sliding plate 313 is precisely guided by the upper wall of the frame block 35 and both sides of the fixing rod 34, guaranteeing the stability of the sliding motion. The displacement grooves on the sliding plate 313 are distributed in a figure-eight or V-shape. This groove structure ensures that when the electric cylinder 311 drives the sliding plate 313 to move in a straight line, it can forcibly drive the sliding rod 32, which is slidably connected in the displacement groove, to undergo lateral displacement. This, in turn, drives the sliding rod 32 connected in different displacement grooves to move the push plate 33 closer to or further away from each other, adapting to the leveling requirements of films of different thicknesses or widths. The side of the push plate 33 away from the sliding rod 32 is set as a smooth arc surface. The inner side of the push plate 33 has a guide hole for the fixed rod 34 to pass through. The guide hole and the fixed rod 34 slide together, further ensuring the smoothness and precision of the push plate 33 during its unfolding and retracting movements, and avoiding jamming. Multiple sets of anti-wrinkle mechanisms 3 are arranged at intervals along the length of the top cover 2. All sets of anti-wrinkle mechanisms 3 are located above the leveling machine 1. Through coordinated work, they can apply uniform tensile force to the film in different areas, effectively eliminating wrinkles in large areas of film and ensuring overall leveling effect. The electric cylinder 311 is fixedly connected to the inner top wall of the top cover 2 by bolts. The telescopic axis of the electric cylinder 311 is parallel to the sliding direction of the sliding plate 313. This installation method ensures that the thrust direction of the electric cylinder 311 is completely consistent with the movement direction of the sliding plate 313, minimizing transmission loss and ensuring the driving accuracy and response speed of the anti-wrinkle mechanism 3.

[0034] The implementation principle of this application embodiment is as follows: When leveling the plastic film, the plastic film is wound around the roller from the left end of the leveling machine 1, passes through the top of the leveling machine 1, and is finally pulled out by the rightmost roller. During the leveling process, the top cover 2 is placed on the leveling machine 1, and the internal heating environment begins to function.

[0035] When the anti-wrinkle function needs to be activated, the electric cylinder 311 serves as the power source for the drive assembly 31. Its output end drives the fixed column 312 to move back and forth, causing the sliding plate 313, which is fixedly connected to the bottom of the fixed column 312, to slide inside the frame block 35.

[0036] Because the sliding plate 313 has an inclined displacement groove inside, and one end of the sliding rod 32 is slidably connected to the inner side of the displacement groove, the linear reciprocating motion of the sliding plate 313 is converted into the lateral movement of the sliding rod 32 through the guiding effect of the displacement groove. The other end of the sliding rod 32 is fixedly connected to the push plate 33, which is slidably connected to the outer wall of the fixed rod 34. Therefore, the lateral movement of the sliding rod 32 directly drives the push plate 33 to expand to both sides or move closer to each other on the fixed rod 34. This expansion or contraction action applies a lateral tensile force to the plastic film passing through the top of the leveling machine 1, effectively eliminating wrinkles generated during the heating and leveling process of the film and ensuring a smooth film surface.

[0037] After the top cover 2 is closed, the sealing mechanism 4 functions to ensure a stable internal heating environment and a sealed seal during leveling of the leveling machine 1. By pulling the clamping rotating block 43, it rotates around the rotating rod 42, which is fixedly connected to the fixed block 41. When the clamping rotating block 43 rotates to its final position, a slot on its inner side, which mates with the second fixed rod 44, engages with the outer wall of the second fixed rod 44, which is fixedly connected to the front end of the leveling machine 1. The tight engagement between the clamping rotating block 43 and the second fixed rod 44 creates an effective downward pressure on the top cover 2, thereby reinforcing the top cover 2, preventing it from loosening during heating or vibration, and ensuring the stability and sealing of the internal heating environment. The anti-wrinkle mechanism 3 stretches the film, and the sealing mechanism 4 further reinforces the top cover 2.

Claims

1. A leveling device for processing plastic film, comprising a leveling machine and a top cover covering the top of the leveling machine, wherein the inner wall of the top cover is provided with an anti-wrinkle mechanism; Its features are, The anti-wrinkle mechanism includes a drive assembly, a slide bar, a push plate, a fixing rod, and a frame block. The drive assembly includes an electric cylinder, a fixing column, and a sliding plate. The electric cylinder is fixedly connected to the inner wall of the top cover. The output end of the electric cylinder is fixedly connected to the fixed column. The bottom end of the fixed column is fixedly connected to the sliding plate. The frame block is fixedly connected to the inner wall of the top cover. The first fixed rod is fixedly connected to the inner side of the frame block. The sliding plate is slidably connected to the inner side of the frame block. An inclined displacement groove is opened inside the sliding plate. One end of the sliding rod is slidably connected to the inner side of the displacement groove. The other end of the sliding rod is fixedly connected to the push plate. The push plate is slidably connected to the outer wall of the first fixed rod. When the electric cylinder drives the sliding plate to move, the sliding rod is guided by the displacement groove to drive the push plate to move along the first fixed rod.

2. The leveling device for plastic film processing according to claim 1, characterized in that, A sealing mechanism is provided between the front end of the leveling machine and the outer side of the top cover. The sealing mechanism includes a fixing block, a rotating rod, a clamping rotating block, and a second fixing rod.

3. The leveling device for plastic film processing according to claim 2, characterized in that, The fixing block is fixedly connected to the outside of the top cover, the rotating rod is rotatably connected to the fixing block, and the clamping rotating block is fixedly connected to the outer wall of the rotating rod.

4. The leveling device for plastic film processing according to claim 3, characterized in that, The second fixing rod is fixedly connected to the front end of the leveling machine. The inner side of the pressing rotating block is provided with a slot that cooperates with the second fixing rod. The pressing rotating block is rotated by the rotating rod and locked onto the outer wall of the second fixing rod.

5. The leveling device for plastic film processing according to claim 1, characterized in that, The frame has a U-shaped structure with its opening facing downwards. The two ends of the first fixing rod are respectively fixedly connected to the opposite sides of the inner wall of the frame. The sliding plate is located between the first fixing rod and the inner top wall of the frame.

6. The leveling device for plastic film processing according to claim 1, characterized in that, The displacement grooves are distributed in a figure-eight or V-shape on the sliding plate to drive the slide rods connected in different displacement grooves to move the push plates closer to or further apart from each other.

7. The leveling device for plastic film processing according to claim 1, characterized in that, The side of the push plate away from the slide rod is set as a smooth arc surface, and a guide hole is opened on the inner side of the push plate for the fixing rod to pass through.

8. The leveling device for plastic film processing according to claim 1, characterized in that, Multiple sets of anti-wrinkle mechanisms are arranged at intervals along the length of the top cover, and all sets of anti-wrinkle mechanisms are located above the leveling machine.

9. The leveling device for plastic film processing according to claim 1, characterized in that, The electric cylinder is fixedly connected to the inner top wall of the top cover by bolts, and the telescopic axis of the electric cylinder is parallel to the sliding direction of the sliding plate.

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