A laminating apparatus for manufacturing plastic film with flattening function

Abstract

This utility model belongs to the field of plastic film manufacturing technology and discloses a laminating device for plastic film manufacturing with a leveling function. It includes a frame, a first unwinding mechanism, a second unwinding mechanism, a laminating mechanism, and a rewinding mechanism. An adaptive leveling mechanism is provided between the first unwinding mechanism and the laminating mechanism. The adaptive leveling mechanism includes a floating roller, a floating support, and an elastic pre-tensioning component. Two floating supports are symmetrically arranged and rotatably mounted on the frame via a rotating shaft. The two ends of the floating roller are mounted on the floating support via bearing seats. The elastic pre-tensioning component provides a vertically downward pre-tensioning force to the bearing seats, and the bearing seats can slide along a vertical groove on the floating support. This utility model replaces the traditional electronically controlled correction system with the elastic pre-tensioning structure and mechanical adaptive oscillation of the floating roller, significantly reducing equipment costs and maintenance difficulty. It can also respond to tension changes in real time, effectively eliminating instantaneous wrinkles during high-speed transport, and achieving a leveling effect superior to fixed flattening rollers.

Description

Technical Field

[0001] This utility model relates to the field of plastic film manufacturing technology, and in particular to a laminating device for manufacturing plastic film with a leveling function. Background Technology

[0002] In the production and processing of plastic films, it is often necessary to laminate two or more layers of films with different materials or functions to prepare composite film materials. Existing lamination equipment usually includes processes such as unwinding, guiding, gluing (or hot pressing), lamination and rewinding.

[0003] In existing technology, after the plastic film is drawn out from the unwinding mechanism, it is conveyed to the laminating mechanism through a series of guide rollers. Due to uneven winding of the unwinding roll itself, parallelism error of the guide rollers, or equipment vibration, the plastic film is prone to uneven tension distribution, local slack, or "deviation" during the conveying process. This will cause wrinkles, wavy edges, or stress concentration lines to be generated in the film before entering the critical laminating process. After laminating, the wrinkled film will form defects that cannot be eliminated in the composite film, such as bubbles, delamination, or poor appearance, which seriously affects the quality and yield of the product.

[0004] To address this issue, some high-end equipment currently employs an electronically controlled correction system. This system uses sensors to detect the position of the film edge and then drives a servo motor to adjust the angle or position of the guide rollers. However, this system is complex, costly, and inconvenient to maintain. Furthermore, it is not timely enough in responding to the instantaneous, high-frequency micro-wrinkles generated during high-speed operation. Other solutions use fixed curved rollers or flattening rollers, but their leveling effect is limited and they cannot adaptively cope with films of different materials and thicknesses, as well as changing working conditions. Therefore, we propose a laminating device for plastic film manufacturing with a leveling function. Utility Model Content

[0005] To address the technical problems existing in the background art described above, this utility model provides the following technical solution:

[0006] A laminating device for manufacturing plastic film with a leveling function includes a frame, and a first unwinding mechanism, a second unwinding mechanism, a laminating mechanism, and a rewinding mechanism sequentially arranged on the frame along the plastic film conveying direction. An adaptive leveling mechanism is provided between the first unwinding mechanism and the laminating mechanism.

[0007] The adaptive leveling mechanism includes a floating roller, a floating support, and an elastic preload assembly. Two floating supports are symmetrically arranged and rotatably mounted on the frame via a rotating shaft. The two ends of the floating roller are mounted on the floating support via bearing seats. The elastic preload assembly provides a vertically downward preload to the bearing seats, and the bearing seats can slide along the vertical groove on the floating support.

[0008] As a technical solution of the bonding equipment for manufacturing plastic film with leveling function described in this utility model, the first unwinding mechanism and the second unwinding mechanism are both equipped with magnetic powder tension controllers.

[0009] As a technical solution of the bonding equipment for manufacturing plastic film with leveling function described in this utility model, the bonding mechanism is a hot-press bonding roller group, which includes a heating roller and a pressing roller that presses and cooperates with the heating roller.

[0010] As a technical solution of the bonding equipment for manufacturing plastic film with leveling function described in this utility model, wherein: the self-adaptive leveling mechanism is provided with positioning guide rollers fixed on the frame on both the film inlet side and the film outlet side.

[0011] As a technical solution of the bonding equipment for manufacturing plastic film with leveling function described in this utility model, the surface of the floating roller is covered with a rubber layer.

[0012] As a technical solution of the bonding equipment for manufacturing plastic film with leveling function according to the present utility model, the elastic pre-tightening component includes an adjusting screw, a pre-tightening spring and a locking nut. The adjusting screw passes through the upper part of the floating bracket, the lower end of the adjusting screw abuts against the upper surface of the bearing seat, the upper end of the adjusting screw is provided with the locking nut, and the pre-tightening spring is sleeved on the adjusting screw and pressed between the locking nut and the floating bracket.

[0013] As a technical solution of the bonding equipment for manufacturing plastic film with leveling function described in this utility model, the axis of the rotating shaft is spatially perpendicular to the axis of the floating roller.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This utility model replaces the traditional electronically controlled correction system with the elastic pre-tightening structure and mechanical adaptive oscillation of the floating roller, which significantly reduces equipment costs and maintenance difficulty. At the same time, it can respond to tension changes in real time, effectively eliminate instantaneous wrinkles during high-speed transmission, and the leveling effect is better than that of the fixed flattening roller.

[0016] 2. This utility model, through the synergy of magnetic powder tension control, hot pressing bonding parameter optimization, and positioning guide roller path constraint, forms a complete quality control from unwinding to bonding. Combined with the design of the rubber layer and elastic pre-tightening component, it can further protect the integrity of the film material and improve the yield and mechanical property consistency of the composite film. 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0019] Figure 2 This is a schematic side view of the overall structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the main structure of the adaptive leveling mechanism of this utility model.

[0021] Figure 4 This is a cross-sectional schematic diagram of the adaptive leveling mechanism of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Frame; 2. First unwinding mechanism; 3. Second unwinding mechanism; 401. Heating roller; 402. Pressing roller; 5. Rewinding mechanism; 6. Adaptive leveling mechanism; 601. Floating roller; 6011. Rubber layer; 602. Floating support; 6021. Vertical chute; 6031. Adjusting screw; 6032. Preload spring; 6033. Locking nut; 604. Rotating shaft; 605. Bearing seat; 7. Positioning guide roller; 8. Magnetic powder tension controller. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-4 A laminating device for manufacturing plastic film with a leveling function is provided. This laminating device for manufacturing plastic film with a leveling function includes a frame 1, and a first unwinding mechanism 2, a second unwinding mechanism 3, a laminating mechanism and a winding mechanism 5 (which can be equipped with a tension sensor to wind up the composite film at a uniform speed) arranged sequentially on the frame 1 along the plastic film conveying direction. An adaptive leveling mechanism 6 is provided between the first unwinding mechanism 2 and the laminating mechanism.

[0026] The adaptive leveling mechanism 6 includes a floating roller 601, a floating support 602, and an elastic pre-tightening component. Two floating supports 602 are symmetrically arranged and rotatably mounted on the frame 1 via a rotating shaft 604. The rotating shaft 604 is hinged to the frame 1. The two ends of the floating roller 601 are mounted on the floating support 602 via bearing seats 605. The elastic pre-tightening component provides a vertically downward pre-tightening force to the bearing seats 605, and the bearing seats 605 can slide along the vertical groove 6021 on the floating support 602 (e.g., pressing down the adjusting screw 6031 of the elastic pre-tightening component by 1cm can increase the pre-tightening force by 20N). In application, the up-and-down floating of the floating roller 601 and the dynamic adjustment of the elastic pre-tightening component can compensate for the local slack caused by uneven tension or vibration of the plastic film in real time, avoiding the generation of wrinkles and wavy edges. At the same time, the cooperative design of the floating support 602 and the rotating shaft 604 allows the floating roller 601 to swing adaptively with the change of film tension, replacing the traditional electronically controlled correction system and reducing complexity and cost.

[0027] Reference Figure 1 and Figure 2 Both the first unwinding mechanism 2 and the second unwinding mechanism 3 are equipped with magnetic powder tension controllers 8, which adjust the unwinding tension by current to prevent the film from becoming loose or too tight. In application, the magnetic powder tension controller 8 precisely controls the unwinding tension to reduce film offset or stress concentration caused by unwinding tension fluctuations, and forms a synergistic optimization with the adaptive leveling mechanism 6.

[0028] Reference Figure 1 and Figure 2 The bonding mechanism is a hot-pressing bonding roller assembly, which includes a heating roller 401 and a pressing roller 402 that presses against the heating roller 401. The temperature is controllable (e.g., 80-150℃), the surface temperature of the heating roller 401 is uniform (±2℃ error), and the pressing pressure is 0.2-0.5MPa. In application, the combination of the heating roller 401 and the pressing roller 402 can apply uniform hot pressure to the bonding surface, improve the bonding strength, and avoid film deformation caused by uneven temperature. It is especially suitable for hot melt adhesive lamination process.

[0029] Reference Figure 1 and Figure 2 The adaptive leveling mechanism 6 has positioning guide rollers 7 fixed on the frame 1 on both the infeed and outfeed sides. In application, the positioning guide rollers 7 on the infeed and outfeed sides provide double constraints on the film path to prevent secondary wrinkles caused by lateral film offset during leveling, and ensure the continuity of leveling and bonding.

[0030] Reference Figure 3 and Figure 4The surface of the floating roller 601 is covered with a rubber layer 6011. In application, the rubber layer 6011 on the surface of the floating roller 601 increases the friction with the film to prevent slippage, and absorbs small vibrations through elastic deformation to avoid hard contact damage to the film surface.

[0031] Reference Figure 3 and Figure 4 The elastic preload assembly includes an adjusting screw 6031, a preload spring 6032, and a locking nut 6033. The adjusting screw 6031 passes through the upper part of the floating bracket 602, and the lower end of the adjusting screw 6031 abuts against the upper surface of the bearing seat 605. The upper end of the adjusting screw 6031 is provided with a locking nut 6033. The preload spring 6032 is sleeved on the adjusting screw 6031 and is pressed between the locking nut 6033 and the floating bracket 602. In application, the cooperative design of the adjusting screw 6031 and the preload spring 6032 allows for quick adjustment of the preload force to adapt to the needs of films of different thicknesses or materials, and the locking nut 6033 can ensure long-term stability.

[0032] Reference Figure 3 and Figure 4 The axis of the rotating shaft 604 is spatially perpendicular to the axis of the floating roller 601. In application, the spatially perpendicular arrangement of the axes of the rotating shaft 604 and the floating roller 601 makes the swing direction of the floating roller 601 form the optimal mechanical angle with the film conveying direction, thereby improving the sensitivity and effectiveness of the leveling response.

[0033] The working principle of this utility model is as follows: Equipment preparation operation: First, the two base films are respectively loaded into the first unwinding mechanism 2 and the second unwinding mechanism 3, and then pass through the magnetic powder tension controller 8. At this time, the film threading path is as follows:

[0034] Base film 1: First unwinding → infeed side positioning guide roller 7 → floating roller 601 → outfeed side positioning guide roller 7 → lamination mechanism;

[0035] Base film 2: Second unwind → directly led to the laminating mechanism, and then according to the film thickness (e.g., 0.05-0.2mm), rotate the locking nut 6033 to compress the preload spring 6032, so that the floating roller 601 applies downward pressure to the film;

[0036] The bonding process is as follows: First, turn on the magnetic powder tension controller 8 and set the tension of base film 1 (e.g., 15N) and the tension of base film 2 (e.g., 10N). Then, when the film passes through the floating roller 601, the local slack section will lift the floating roller 601. The pre-tension spring 6032 automatically compensates for the tension. Lateral deviation is corrected by the positioning guide roller 7. At the same time, the heating roller 401 heats up to the set temperature (e.g., 120℃ for PE film). The two films are pressed together by the pressing roller 402 (pressure 0.3MPa) to form a composite film. Finally, after the composite film is cooled, it is wound up by the winding mechanism 5 with a constant tension.

[0037] Shutdown and maintenance phase: First stop the heating roller 401, and wait for the temperature to drop below 60℃ before stopping the roll. Also, clean the surface of the rubber layer 6011 on the floating roller 601 regularly, and replace it if it is worn.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A laminating device for manufacturing plastic film with a leveling function, comprising a frame (1), and a first unwinding mechanism (2), a second unwinding mechanism (3), a laminating mechanism, and a rewinding mechanism (5) sequentially arranged on the frame (1) along the plastic film conveying direction, characterized in that: An adaptive leveling mechanism (6) is provided between the first unwinding mechanism (2) and the bonding mechanism. The adaptive leveling mechanism (6) includes a floating roller (601), a floating bracket (602), and an elastic preload assembly. Two floating brackets (602) are symmetrically arranged and are rotatably mounted on the frame (1) via a rotating shaft (604). The two ends of the floating roller (601) are mounted on the floating bracket (602) via bearing seats (605). The elastic preload assembly provides a vertically downward preload force to the bearing seats (605), and the bearing seats (605) can slide along the vertical groove (6021) on the floating bracket (602).

2. The laminating equipment for manufacturing plastic film with leveling function according to claim 1, characterized in that: Both the first unwinding mechanism (2) and the second unwinding mechanism (3) are equipped with a magnetic powder tension controller (8).

3. The laminating equipment for manufacturing plastic film with leveling function according to claim 1, characterized in that: The bonding mechanism is a hot-press bonding roller assembly, which includes a heating roller (401) and a pressing roller (402) that presses against the heating roller (401).

4. The laminating apparatus for manufacturing a plastic film having a flattening function according to claim 1, characterized in that: The adaptive leveling mechanism (6) is provided with positioning guide rollers (7) fixed on the frame (1) on both the infeed side and the outfeed side.

5. The laminating equipment for manufacturing plastic film with leveling function according to claim 1, characterized in that: The surface of the floating roller (601) is covered with a rubber layer (6011).

6. The laminating equipment for manufacturing plastic film with leveling function according to claim 1, characterized in that: The elastic preload assembly includes an adjusting screw (6031), a preload spring (6032), and a locking nut (6033). The adjusting screw (6031) passes through the upper part of the floating bracket (602), and the lower end of the adjusting screw (6031) abuts against the upper surface of the bearing seat (605). The upper end of the adjusting screw (6031) is provided with the locking nut (6033). The preload spring (6032) is sleeved on the adjusting screw (6031) and is pressed between the locking nut (6033) and the floating bracket (602).

7. The laminating apparatus for manufacturing a plastic film having a flattening function according to claim 1, characterized in that: The axis of the rotating shaft (604) is spatially perpendicular to the axis of the floating roller (601).

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