Multi-roller leveling device for plastic film production

Abstract

This utility model relates to the field of plastic film production technology, and in particular to a multi-roller leveling device for plastic film production. It includes a tensioning mechanism comprising a housing with horizontal plates fixedly connected to both ends. One set of horizontal plates is equipped with an unwinding roller, and the other set with a take-up roller. The housing contains a tension assembly that provides tension to the plastic film, comprising multiple tension rollers. By setting up the tensioning mechanism, during the winding of the plastic film, the heat pressure of the pressure roller softens the surface of the plastic film, temporarily eliminating local wrinkles. Combined with the multiple tension rollers, the plastic film is taut and wound, reducing wrinkles and ensuring the film is as flat and wrinkle-free as possible during winding. Through an adjustment mechanism, the coordination of various parts allows the tension rollers to adjust the tension to suit plastic films of different thicknesses, achieving precise adjustment of the film's tension and increasing the adjustable range.

Description

Technical Field

[0001] This utility model relates to the field of plastic film production technology, and in particular to a multi-roller leveling device for plastic film production. Background Technology

[0002] Plastic film is a thin film made of resins such as polyvinyl chloride, polyethylene, polypropylene, and polystyrene, and is widely used in packaging and coating layers. Plastic film is gaining an increasingly larger market share, especially in the food, pharmaceutical, and chemical industries, where it is widely used for beverage packaging, frozen food packaging, and retortable food packaging. In the existing plastic film production process, the smoothness of the plastic film has a significant impact on product quality and production efficiency; therefore, multi-roller leveling devices are required.

[0003] During use, existing leveling devices only adjust tension through telescopic rods, which reduces wrinkles during plastic film winding and achieves leveling. However, the telescopic rods have low adjustment accuracy and a limited adjustment range when adjusting the tension of the plastic film, thus limiting their use. Therefore, a multi-roller leveling device for plastic film production with higher adjustment accuracy and a wider adjustment range is needed to solve the above problems. Utility Model Content

[0004] In view of the problems that existing leveling devices in the above or prior art only adjust the tension by means of a telescopic rod, so that wrinkles can be reduced when the plastic film is rolled up and the plastic film can be leveled, but the telescopic rod has low adjustment accuracy and limited adjustment range when adjusting the tension of the plastic film, which has certain limitations in use, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A tensioning mechanism includes a housing, with horizontal plates fixedly connected to both ends of the housing. One set of horizontal plates is equipped with an unwinding roller, and the other set with a take-up roller. The housing contains a tension assembly that provides tension to the plastic film, including multiple tension rollers. A leveling assembly is located inside the housing near the unwinding roller, including two sets of pressure rollers. A displacement groove is formed on the inner wall of one side of the housing, and a power assembly that provides power to the pressure rollers is located on one side of the housing. An adjusting mechanism includes an electric telescopic rod fixedly connected to one side of the top of the housing. A cooperating assembly that engages with the tension rollers is located around the output end of the electric telescopic rod.

[0006] As a preferred embodiment of the multi-roller leveling device for plastic film production of this utility model, the tension assembly further includes sliding grooves on both sides of the inner side of the housing. A bidirectional screw is rotatably connected inside the sliding groove. The threads on the left and right sides of the bidirectional screw are opposite. Threaded blocks are threadedly connected to both sides of the bidirectional screw. A rotating shaft is fixedly connected to one end of each threaded block. The rotating shaft is located outside the sliding groove, and one end of the rotating shaft is fixedly connected to the tension roller.

[0007] As a preferred embodiment of the multi-roller leveling device for plastic film production of this utility model, the tension assembly further includes two sets of first motors fixedly connected to the top of the housing, and the output end of the first motor is fixedly connected to one end of the bidirectional screw.

[0008] As a preferred embodiment of the multi-roller leveling device for plastic film production of this utility model, the leveling component further includes two sets of mounting frames. One end of each of the two sets of pressure rollers is fixedly connected to a transmission rod. The two sets of transmission rods are respectively arranged in the two sets of mounting frames and rotate with the mounting frames. One set of mounting frames is fixedly connected to the inner wall of the box, and the bottom end of the other set of mounting frames is fixedly connected to a slider. The slider is arranged in the displacement groove and slides with the displacement groove.

[0009] As a preferred embodiment of the multi-roller leveling device for plastic film production of this utility model, the power component includes a second motor fixedly connected to one side of the top of the housing, and a worm gear fixedly connected to the output end of the second motor. The worm gear is disposed on one side of the mounting frame. The power component also includes a worm wheel fixedly connected to one end of two sets of transmission rods, and the worm wheel meshes with the worm gear.

[0010] As a preferred embodiment of the multi-roller leveling device for plastic film production of this utility model, the electric telescopic rod is disposed on one side of the second motor, and the output end of the electric telescopic rod is fixedly connected to another set of mounting frames.

[0011] As a preferred embodiment of the multi-roller leveling device for plastic film production of this utility model, the mating assembly includes a connecting rod fixedly connected to the periphery of the output end of the electric telescopic rod, and the connecting rod is disposed above the tension roller and the mounting frame.

[0012] The beneficial effects of this multi-roller leveling device for plastic film production are as follows:

[0013] 1. This utility model, by setting up a tensioning mechanism, uses the heat pressure of the pressure roller to soften the surface of the plastic film during the winding process, temporarily eliminating local wrinkles. In addition, multiple sets of tension rollers are used to tighten and wind up the plastic film, reducing wrinkles and making the plastic film as flat and wrinkle-free as possible during winding.

[0014] 2. This utility model, through an adjustment mechanism, allows for the adaptation of different thicknesses of plastic film during winding. The electric telescopic rod and mounting frame work together to ensure the distance between the two sets of pressure rollers can accommodate varying film thicknesses. Simultaneously, the electric telescopic rod moves the connecting rod, adjusting the distance between the connecting rod and the tension roller. This ensures that when the tension roller encounters the connecting rod, it experiences significant resistance, causing the first motor to stop. This allows the tension roller to adjust its tension to accommodate different film thicknesses, achieving precise adjustment of the film's tension and increasing the adjustable range. Attached Figure Description

[0015] 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.

[0016] Figure 1 A schematic diagram of the overall structure of a multi-roller leveling device for plastic film production.

[0017] Figure 2 A cross-sectional schematic diagram of a multi-roller leveling device for plastic film production.

[0018] Figure 3 Another cross-sectional schematic diagram of a multi-roller leveling device for plastic film production.

[0019] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0020] Figure 5 A partial cross-sectional schematic diagram of a multi-roller leveling device used in plastic film production.

[0021] In the diagram: 10. Housing; 11. Unwinding roller; 12. Rewinding roller; 13. Tension assembly; 131. Tension roller; 132. Slide groove; 133. Bidirectional screw; 134. Threaded block; 135. First motor; 14. Leveling assembly; 141. Overlapping roller; 142. Mounting frame; 143. Transmission rod; 144. Slider; 15. Power assembly; 151. Second motor; 152. Worm gear; 153. Worm wheel; 20. Electric telescopic rod; 21. Mating assembly; 211. Connecting rod. Detailed Implementation

[0022] 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.

[0023] Example 1, referring to Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a multi-roller leveling device for plastic film production, which can achieve the effect of leveling and adjusting the tension of plastic film. It includes a tensioning mechanism, including a housing 10. Both ends of the housing 10 are fixedly connected to horizontal plates. One set of horizontal plates is equipped with an unwinding roller 11, and the other set of horizontal plates is equipped with a take-up roller 12. The inside of the housing 10 is provided with a tension assembly 13 to provide tension for the plastic film. The tension assembly 13 includes multiple sets of tension rollers 131. The inside of the housing 10 near the unwinding roller 11 is provided with a leveling assembly 14. The leveling assembly 14 includes two sets of pressure rollers 141. A displacement groove is opened on the inner wall of one side of the housing 10. A power assembly 15 is provided on one side of the housing 10 to provide power for the pressure rollers 141.

[0024] Specifically, a plastic film is provided on the unwinding roller 11, and openings are provided on both sides of the housing 10. The unwinding roller 11 and the take-up roller 12 are respectively provided at the openings. The unwinding roller 11 is used to transport the plastic film, and the take-up roller 12 is used to wind up the plastic film. The plastic film is leveled by the pressure roller 141 and tensioned by the tension roller 131 to tighten the plastic film, so that the wound plastic film can be as flat and wrinkle-free as possible.

[0025] Furthermore, the tension assembly 13 also includes slide grooves 132 on both sides inside the housing 10. A bidirectional screw 133 is rotatably connected inside the slide groove 132. The threads on the left and right sides of the bidirectional screw 133 are opposite. Threaded blocks 134 are threadedly connected to both sides of the bidirectional screw 133. A rotating shaft is fixedly connected to one end of the threaded block 134. The rotating shaft is located outside the slide groove 132, and one end of the rotating shaft is fixedly connected to the tension roller 131. The tension assembly 13 also includes two sets of first motors 135 fixedly connected to the top of the housing 10. The output end of the first motor 135 is fixedly connected to one end of the bidirectional screw 133.

[0026] Specifically, the first motor 135 drives the bidirectional screw 133 to rotate, which in turn drives the symmetrically arranged tension rollers 131 to move relative to each other through the threaded block 134. This changes the relative distance between the symmetrically arranged tension rollers 131, thereby tightening and winding the plastic film and reducing wrinkles. The surface of the tension rollers 131 is coated with polyurethane to minimize scratches on the plastic film. The first motor 135 is model U1007F20.

[0027] Preferably, the leveling assembly 14 further includes two sets of mounting brackets 142. One end of each of the two sets of pressure rollers 141 is fixedly connected to a transmission rod 143. The two sets of transmission rods 143 are respectively disposed in the two sets of mounting brackets 142 and rotate in cooperation with the mounting brackets 142. One set of mounting brackets 142 is fixedly connected to the inner wall of the housing 10, and the bottom end of the other set of mounting brackets 142 is fixedly connected to a slider 144. The slider 144 is disposed in the displacement groove and slides in cooperation with the displacement groove. The power assembly 15 includes a second motor 151 fixedly connected to one side of the top of the housing 10. The output end of the second motor 151 is fixedly connected to a worm gear 152. The worm gear 152 is disposed on one side of the mounting bracket 142. The power assembly 15 also includes a worm wheel 153 fixedly connected to one end of the two sets of transmission rods 143. The worm wheel 153 meshes with the worm gear 152.

[0028] It should be noted that the pressing roller 141 is equipped with a heating element inside. The pressing roller 141 softens the surface of the plastic film by heating (heat transfer oil or electromagnetic heating to 160-200℃) and applying pressure (0.2-0.5MPa), temporarily eliminating local wrinkles. The worm gear 152 drives the worm wheel 153 to rotate, which in turn drives the pressing roller 141 to rotate, making the plastic film heat up more evenly and improving the leveling effect. The second motor 151 is model U1007F20. A controller (not shown in the figure) is installed on the housing 10. The controller is connected to an external power supply and is electrically connected to the first motor 135, the second motor 151 and the heating element inside the pressing roller 141.

[0029] During use, when the plastic film is fed and wound up, it passes through two sets of pressure rollers 141 and is wound in an S-shape around multiple sets of tension rollers 131. The heating element inside the pressure roller 141 is activated, and the second motor 151 drives the worm gear 152 to rotate. The rotation of the worm gear 152 drives the worm wheel 153 to rotate, which in turn drives the two sets of pressure rollers 141 to rotate, ensuring that the plastic film is heated evenly. The plastic film is first heated by the pressure rollers 141, which softens the surface of the plastic film and temporarily eliminates local wrinkles. Then, the first motor 135 drives the bidirectional screw 133 to rotate, which in turn drives the symmetrically arranged tension rollers 131 to move relative to each other through the threaded block 134. This changes the relative distance between the symmetrically arranged tension rollers 131, thereby tightening and winding the plastic film, reducing wrinkles and making the plastic film as flat and wrinkle-free as possible during winding.

[0030] Example 2, refer to Figures 2-5This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an adjustment mechanism for a multi-roller leveling device for plastic film production. It can precisely adjust the tension of the plastic film according to the thickness of the plastic film to be leveled. It includes an electric telescopic rod 20 fixedly connected to one side of the top of the housing 10. The output end of the electric telescopic rod 20 is provided with a cooperating component 21 that cooperates with the tension roller 131. The electric telescopic rod 20 is located on one side of the second motor 151. The output end of the electric telescopic rod 20 is fixedly connected to another set of mounting brackets 142. The cooperating component 21 includes a connecting rod 211 fixedly connected to the periphery of the output end of the electric telescopic rod 20. The connecting rod 211 is located above the tension roller 131 and the mounting bracket 142.

[0031] It should be noted that the electric telescopic rod 20 is model TG-300B-30-130-24-30, and the electric telescopic rod 20 is electrically connected to the controller; the connecting rod 211 is set above the tension roller 131, so that when the first motor 135 drives the tension roller 131 to move, when the tension roller 131 touches the connecting rod 211, it is subject to greater resistance, causing the first motor 135 to stop working.

[0032] In use, when it is necessary to roll up plastic films of different thicknesses, the electric telescopic rod 20 drives another set of mounting brackets 142 to move within the housing 10, thereby adjusting the distance between the two sets of pressure rollers 141 to accommodate plastic films of different thicknesses. At the same time, the electric telescopic rod 20 drives the connecting rod 211 to move, adjusting the distance between the connecting rod 211 and the tension roller 131. When the first motor 135 drives the tension roller 131 to move, the tension roller 131 encounters the connecting rod 211 and experiences greater resistance, causing the first motor 135 to stop working. This allows the tension roller 131 to adjust its tension to accommodate plastic films of different thicknesses.

[0033] 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 multi-roller leveling device for plastic film production, characterized in that: include, The tensioning mechanism includes a housing (10), with horizontal plates fixedly connected to both ends of the housing (10). One set of the horizontal plates is equipped with an unwinding roller (11), and the other set of the horizontal plates is equipped with a winding roller (12). The housing (10) is equipped with a tension assembly (13) that provides tension for the plastic film. The tension assembly (13) includes multiple tension rollers (131). The housing (10) is equipped with a leveling assembly (14) on the side near the unwinding roller (11). The leveling assembly (14) includes two pressing rollers (141). A displacement groove is provided on the inner wall of one side of the housing (10). The housing (10) is equipped with a power assembly (15) that provides power to the pressing rollers (141) on one side. The adjustment mechanism includes an electric telescopic rod (20) fixedly connected to one side of the top of the housing (10), and the output end of the electric telescopic rod (20) is provided with a cooperating component (21) that cooperates with the tension roller (131).

2. The multi-roller leveling device for plastic film production as described in claim 1, characterized in that: The tension assembly (13) also includes slide grooves (132) on both sides inside the housing (10). A bidirectional screw (133) is rotatably connected inside the slide groove (132). The threads on the left and right sides of the bidirectional screw (133) are opposite. Threaded blocks (134) are threadedly connected to both sides of the bidirectional screw (133). A rotating shaft is fixedly connected to one end of the threaded block (134). The rotating shaft is located outside the slide groove (132). One end of the rotating shaft is fixedly connected to the tension roller (131).

3. The multi-roller leveling device for plastic film production as described in claim 2, characterized in that: The tension assembly (13) also includes two sets of first motors (135) fixedly connected to the top of the housing (10), and the output end of the first motor (135) is fixedly connected to one end of the bidirectional screw (133).

4. The multi-roller leveling device for plastic film production as described in claim 3, characterized in that: The leveling assembly (14) also includes two sets of mounting brackets (142). One end of each of the two sets of pressing rollers (141) is fixedly connected to a transmission rod (143). The two sets of transmission rods (143) are respectively set in the two sets of mounting brackets (142) and rotate in cooperation with the mounting brackets (142). One set of mounting brackets (142) is fixedly connected to the inner wall of the box (10). The bottom end of the other set of mounting brackets (142) is fixedly connected to a slider (144). The slider (144) is set in the displacement groove and slides in cooperation with the displacement groove.

5. The multi-roller leveling device for plastic film production as described in claim 4, characterized in that: The power assembly (15) includes a second motor (151) fixedly connected to one side of the top of the housing (10). The output end of the second motor (151) is fixedly connected to a worm gear (152). The worm gear (152) is located on one side of the mounting bracket (142). The power assembly (15) also includes a worm wheel (153) fixedly connected to one end of two sets of transmission rods (143). The worm wheel (153) meshes with the worm gear (152).

6. The multi-roller leveling device for plastic film production as described in claim 5, characterized in that: The electric telescopic rod (20) is located on one side of the second motor (151), and the output end of the electric telescopic rod (20) is fixedly connected to another set of mounting brackets (142).

7. The multi-roller leveling device for plastic film production as described in claim 6, characterized in that: The mating assembly (21) includes a connecting rod (211) fixedly connected to the periphery of the output end of the electric telescopic rod (20), and the connecting rod (211) is disposed above the tension roller (131) and the mounting bracket (142).

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