A crease prevention mechanism for a diaphragm coating machine

Abstract

The utility model discloses a diaphragm coating machine anti -wrinkle mechanism relates to anti -wrinkle mechanism technical field. The utility model discloses a tensioning structure, including the hollow tensioning roller, the support shaft at the both ends of tensioning roller, anti -wrinkle structure, including the ball of rotation installation in the outer wall of tensioning roller, the frame in the inside of tensioning, the roller axle of rotation installation in the inside of frame, the carrier roller of sleeve joint in the outer wall of roller axle, the conveyer belt of sleeve joint in the outer wall of carrier roller, be provided with the mounting bracket above the mounting seat, be provided with the spring between the mounting seat and mounting bracket. The utility model discloses a tensioning structure inside setting up anti -wrinkle structure to solve the elastic support tensioning roller only provides radial and longitudinal tension, can not solve the width direction of horizontal film, stress uneven, cause film horizontal one end tight, one end loose, the longitudinal tension of elastic tensioning roller can only elongate film along the direction of conveying, can not pull apart the side edge to the side of horizontal relaxation, finally form the problem of oblique wrinkle or one -sided wrinkle.

Description

Technical Field

[0001] This utility model relates to the field of anti-wrinkle mechanism technology, and in particular to an anti-wrinkle mechanism for a diaphragm coating machine. Background Technology

[0002] Functional thin film substrates in the electronics and electrical fields, such as pure PET film and PP film, only possess basic physical properties such as flexibility and temperature resistance, which cannot meet the equipment's demand for "functional customization." The core significance of coating lies in giving the film a target function, improving its performance, or expanding its application scenarios by coating the film surface with a specific coating. For example, to meet the high temperature resistance requirements of circuit boards, PET insulating film can increase its temperature resistance range from 120℃ to over 200℃ after being coated with an organosilicon high-temperature resistant coating. After PI film is coated with a polyimide modified coating, its wear resistance is improved, making it suitable for the long-term friction scenarios of high-frequency connectors.

[0003] During PI film coating, the PI film is unwound and wound using an unwinding and rewinding structure. The coating machine is installed on a conveyor line and also has cooling and drying structures. During the conveying process, the PI film is supported by elastic tension rollers. The core function of the elastic tension rollers is to provide radial and longitudinal tension, that is, radial tension along the conveying direction of the PI film, to compensate for fluctuations in unwinding speed and differences in film elongation, and to prevent the film from becoming loose overall. However, it cannot completely solve the problem of uneven stress in the transverse width direction of the film. Since the PI film roll is in a cylindrical shape, the inner layer of the roll will generate internal stress that shrinks towards the center under long-term pressure. The closer to the core of the roll, the greater the shrinkage stress. When the film is drawn from the unwinding device and passes through the tension rollers, the shrinkage stress at both ends in the transverse direction is inconsistent. There are also errors in the edge precision when the roll is cut, resulting in the film being tight at one end and loose at the other in the transverse direction. The longitudinal tension of the elastic tension rollers can only stretch the film along the conveying direction, but cannot pull the loose side towards the edge, ultimately forming oblique wrinkles or single-sided wrinkles, which affects the coating process of the PI film. Therefore, those skilled in the art have provided an anti-wrinkle mechanism for a diaphragm coating machine to solve the problems mentioned in the background art. Utility Model Content

[0004] 1. Technical Solution To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to an anti-wrinkle mechanism for a diaphragm coating machine, comprising, The tensioning structure includes a hollow tensioning roller and support shafts located at both ends of the tensioning roller; The anti-wrinkle structure includes two sets of balls rotatably mounted on the outer wall of the tensioning roller in a circular array, a frame symmetrically distributed inside the tensioning roller, rollers rotatably mounted inside the frame in an equidistant array, idler rollers sleeved on the outer wall of the rollers, and a conveyor belt sleeved on the outer wall of the idler rollers.

[0005] Furthermore, a mounting base is sleeved on the outer side of the tension roller, and bearing seats are provided on both sides of the lower end of the mounting base, and the support shaft is rotatably mounted inside the bearing seats; Specifically, the bearing housing provides rotational support to the support shafts at both ends of the tension roller, allowing the tension roller to provide rolling support to the PI film.

[0006] Furthermore, a mounting bracket is provided above the mounting base, and symmetrically distributed springs are provided between the mounting base and the mounting bracket. A sliding sleeve with symmetrical parts is embedded inside the upper end of the mounting bracket, and a guide rod with symmetrical distribution inside the spring and slidably inserted into the sliding sleeve is provided at the upper end of the mounting base. Specifically, the guide rod slides inside the sleeve to guide the telescopic spring and prevent it from shifting outward.

[0007] Furthermore, a motor is installed inside the tensioning roller, a rotating shaft is installed at the output end of the motor, a conical wheel is installed at one end of the rotating shaft, and a conical wheel is sleeved on the outer wall of the roller shaft to mesh with the conical wheel. Specifically, the meshing between conical wheel one and conical wheel two enables the transmission of power from the motor output end, driving the roller to rotate.

[0008] Furthermore, the support shaft is hollow inside, and a special-shaped plate is sleeved on the outer wall of the motor, which is suspended at the center of the support shaft and connected to the bearing seat at one end. One end of the special-shaped plate is connected to the frame. Specifically, the hollow interior of the support shaft ensures the effective installation of the irregularly shaped plate, and the irregularly shaped plate effectively supports the motor.

[0009] Furthermore, the outer wall of the idler roller is fitted with symmetrically distributed limiting rings two located on the outside of the belt, the outer walls of both ends of the tension roller are fitted with symmetrically distributed limiting rings one, the corners of the conveyor belt are rounded, and the outer wall of the conveyor belt is provided with an anti-static friction pad. Specifically, the second limiting ring limits the belt on the outer wall of the idler roller, the first limiting ring limits the PI film conveyed on the outer wall of the tension roller, and the anti-static friction pad prevents the PI film from generating static electricity.

[0010] 2. Beneficial effects Compared with existing technologies, the advantages of this utility model are: This invention features two sets of ball bearings arranged in a circular array, rotatably mounted on the outer wall of a tension roller. Inside the tension roller, two sets of conveyor belts move in opposite directions. Friction pads on the outer wall of the conveyor belts contact the ball bearings, causing the two sets of ball bearings to roll from the center outwards, applying an outward frictional force to the conveyed PI film. This automatically smooths out wrinkles in the PI film. The smoothing structure is installed inside the tension roller, without interfering with it, reducing the installation volume. Furthermore, it is linked with the ball bearings rolling on the outer wall of the tension roller through friction, and the built-in components add a lateral (axial) flattening force, forming a dual effect of longitudinal tensioning and lateral flattening. From a stress balance perspective, this completely eliminates wrinkles and ensures stable coating processing of the PI film.

[0011] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying 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.

[0013] Figure 1 This is a front-view three-dimensional structural diagram of the present invention; Figure 2 This is a top-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the tension roller of this utility model in main cross-section; Figure 4 This is a top-view three-dimensional structural diagram of the spring of this utility model; Figure 5 This is a side sectional three-dimensional structural diagram of the idler roller of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 100. Tensioning structure; 101. Tensioning roller; 102. Mounting frame; 103. Mounting base; 104. Limiting ring 1; 105. Support shaft; 106. Guide rod; 107. Sliding sleeve; 108. Spring; 109. Bearing housing; 200. Anti-wrinkle structure; 201. Frame; 202. Idler roller; 203. Belt; 204. Ball bearing; 205. Motor; 206. Shaped plate; 207. Shaft; 208. Conical wheel one; 209. Roller shaft; 210. Conical wheel two; 211. Limiting ring two. Detailed Implementation

[0015] 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.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0019] Example 1 Please see Figure 1-5 As shown, this embodiment is an anti-wrinkle mechanism for a diaphragm coating machine, including: The tensioning structure 100 includes a hollow tensioning roller 101 and support shafts 105 located at both ends of the tensioning roller 101. A mounting base 103 is sleeved on the outer side of the tension roller 101. Bearing seats 109 are provided on both sides of the lower end of the mounting base 103. The support shaft 105 is rotatably installed inside the bearing seats 109. A mounting bracket 102 is provided above the mounting base 103. A symmetrically distributed spring 108 is provided between the mounting base 103 and the mounting bracket 102. A sliding sleeve 107 with a symmetrical part is embedded inside the upper end of the mounting bracket 102. A guide rod 106 with a symmetrical distribution inside the spring 108 and a sliding end inserted into the sliding sleeve 107 is provided at the upper end of the mounting base 103. The anti-wrinkle structure 200 includes two sets of balls 204 rotatably mounted on the outer wall of the tension roller 101 in a ring array, a frame 201 symmetrically distributed inside the tension roller, rollers 209 rotatably mounted inside the frame 201 in an equidistant distribution, idler rollers 202 sleeved on the outer wall of the rollers, and a conveyor belt sleeved on the outer wall of the idler rollers 202. The tension roller 101 is equipped with a motor 205, and the output end of the motor 205 is equipped with a rotating shaft 207. One end of the rotating shaft 207 is equipped with a conical wheel 208, and the outer wall of the roller shaft 209 is sleeved with a conical wheel 210 that meshes with the conical wheel 208. The support shaft 105 is hollow inside. A special-shaped plate 206 is sleeved on the outer wall of the motor 205, which is suspended at the center of the support shaft 105 and connected to the bearing seat 109 at one end. One end of the special-shaped plate 206 is connected to the frame 201. The outer wall of the idler roller 202 is fitted with symmetrically distributed limiting rings 211 located outside the belt 203. The outer walls of both ends of the tension roller 101 are fitted with symmetrically distributed limiting rings 104. The corners of the conveyor belt are rounded. The outer wall of the conveyor belt is provided with anti-static friction pads. The tensioning structure 100 and the anti-wrinkle structure 200 are used; The hollow tension roller 101 is made of 6061-T6 aluminum alloy, precision machined by CNC and then anodized. The hollow structure reduces weight compared to a solid roller, lowering the load on the elastic support system and preventing long-term overload fatigue of the spring 108. The internal space includes a hollow cavity to accommodate the anti-wrinkle structure 200, frame 201, conveyor belt, etc., achieving integrated tensioning and anti-wrinkle functions without the need for additional external flattening components. The anodized layer has a surface roughness Ra≤0.4μm, ensuring compatibility with PI film, preventing scratches on the film surface, and reducing film transport resistance through a smooth surface, thus minimizing tension fluctuations caused by localized friction. The support shafts 105 at both ends of the roller 101 are made of 40Cr alloy structural steel, which is chrome-plated after heat treatment. One end of the support shaft 105 is welded and fixed to the tension roller 101, and the other end is rotatably installed in the bearing seat 109. The wear resistance is improved to ensure that there is no radial runout when the tension roller 101 rotates at high speed for a long time, and to avoid sudden changes in local tension of the PI film due to runout. The support shaft 105 is hollow and can be threaded through the motor 205 cable to connect the internal drive motor 205. At the same time, it is fixed to the bearing seat 109 through the special plate 206 to realize the suspension installation of the anti-wrinkle structure 200 and avoid friction between the internal components and the inner wall of the tension roller 101. The 204 balls are made of GCr15 high-carbon chromium bearing steel, which is quenched and tempered at low temperature, and the surface is finely ground to Ra≤0.1μm. Multiple sets of 204 balls are arranged along the axial direction of the tension roller 101. The 204 balls are rotatably installed in the annular groove on the outer wall of the tension roller 101 through miniature deep groove ball bearings. This allows for bidirectional movement, including circumferential rolling with the film and axial movement to both sides. During circumferential rolling, the coefficient of friction is ≤0.005, which allows for synchronous conveying with the PI film and avoids scratching the film surface due to sliding friction. During axial movement, a uniform outward lateral friction force is applied to the PI film, pulling the lateral slack area towards the edge and eliminating oblique and unilateral wrinkles. The frame 201, symmetrically distributed inside the tension roller 101, is made of cold-rolled steel plate. The frame 201 is connected to the shaped plate 206 inside the support shaft 105 via bolts and is suspended inside the tension roller 101, with a gap of 5-10mm between it and the inner wall of the tension roller 101. This allows it to withstand the motion load of the idler roller 202 and the conveyor belt, preventing internal component misalignment due to vibration. The frame 201 has pre-set mounting holes for the roller shaft 209 to ensure its installation. The roller shaft 209 is made of 45# steel and has miniature deep groove ball bearings at both ends, enabling low-resistance rotation of the idler roller 202. The idler roller 202 is made of Shore hardness polyurethane, with an outer layer of 0.5mm thick wear-resistant rubber, and is fitted onto the outside of the roller shaft 209. The conveyor belt is driven by friction through the roller 202. The elasticity of the polyurethane material ensures that the conveyor belt and roller 202 are in close contact, avoiding power transmission loss caused by slippage. The rubber outer layer can buffer the impact when the conveyor belt moves, preventing damage to the conveyor belt due to rigid friction. The inner wall of the conveyor belt is in contact with the roller 202 and moves in opposite directions as the roller 202 rotates. The left side of the conveyor belt moves to the left and the right side moves to the right. The conductive silicone layer on the outer wall contacts the inner wall of the ball bearing 204, which can stably drive the ball bearing 204 to move axially, ensuring the transmission of flattening force. The conductive silicone layer can eliminate the static electricity generated during the PI film transportation process in real time, preventing static electricity from attracting dust and causing coating pinholes, while also preventing static electricity from breaking down the PI film. The edges of the conveyor belt are designed with rounded arcs of R2-R3 to prevent rigid collisions between the edges and the inner wall of the tension roller 101 and the balls 204, reducing wear. The lateral flattening force can be precisely adjusted by changing the speed of the motor 205. The anti-wrinkle structure 200 is suspended inside the tension roller 101, completely independent of its longitudinal rotation. The axial movement of the conveyor belt will not interfere with the tension control of the tension roller 101, and the rotation of the tension roller 101 will not affect the flattening action, avoiding the need for traditional external flattening components. To address motion interference issues, the mounting base 103 on the outer side of the tension roller 101 is made of cast aluminum alloy, which is CNC milled after sand casting and coated with epoxy resin with a thickness of 50-80μm. The bearing seat 109 is made of gray cast iron and is equipped with a deep groove ball bearing. The radial clearance of the deep groove ball bearing is controlled at 0.01-0.02mm, which can stabilize the radial runout when the support shaft 105 rotates, ensure the circumferential accuracy of the outer wall of the tension roller 101, and avoid local tension fluctuations of the PI film caused by roller surface runout. Spring 108 is made of 60Si2Mn spring 108 steel and is treated with quenching and medium-temperature tempering. When the PI film conveying speed fluctuates, such as when the unwinding speed changes instantaneously, spring 108 can compensate for the tension deviation in real time by stretching and contracting, avoiding the film from accumulating wrinkles or stretching wrinkles due to sudden increases or decreases in tension. Sliding sleeve 107 is made of H62 brass or polytetrafluoroethylene and serves as the sliding carrier of guide rod 106. This reduces the frictional resistance when guide rod 106 slides, ensuring that guide rod 106 does not get stuck when spring 108 stretches and contracts, and ensuring the response speed of tension adjustment. Sliding sleeve 107 is embedded inside the upper end of mounting bracket 102, eliminating the risk of loosening. Guide rod 106 is made of 45 steel. The combination of the elastic adjustment of spring 108 and the precise guidance of guide rod 106 can adapt to the tension requirements of different conveying speeds and thicknesses of PI film. The coordinated operation of motor 205, conical wheel 208, and conical wheel 210 provides stable power to the conveyor belt, thereby driving the ball bearings 204 to flatten laterally and solve the problem of uneven lateral stress in the PI film. Motor 205 is a micro DC servo motor with an ADC12 die-cast aluminum alloy shell, a silicon steel sheet laminated rotor, and copper wire stator coils. It has a power of 50-100W and a speed of 100-300 r / min, adjustable via PLC pulse signals. Motor 205 is fixed to the irregularly shaped plate 206 inside the tension roller 101, and transmits power to the roller shaft 209 through the conical wheel assembly, thus driving the conveyor belt to move in opposite directions. The aluminum alloy shell has excellent heat dissipation properties, effectively reducing the electrical... The operating temperature of motor 205 is controlled below 60℃ to avoid high temperature affecting the PI film or internal components. At the same time, the heat-resistant enameled wire is suitable for the environment below 80℃ inside the coating machine, ensuring the long-term stable operation of motor 205. One end of the shaped plate 206 is rigidly connected to the housing of motor 205 by bolts, and the other end is welded or bolted to bearing seat 109, so that motor 205 is suspended at the center of support shaft 105, completely avoiding friction between motor 205 and the inner wall of tension roller 101. Friction will increase the rotational resistance of tension roller 101 and even scratch the inner wall. The insulating paint can prevent the current from being conducted to support shaft 105 when motor 205 leaks electricity. The aluminum alloy shaped plate 206 can also help dissipate heat from motor 205. The second limiting ring 211 is made of polyurethane to limit the axial deviation of the conveyor belt during movement, and prevent the conveyor belt from detaching from the idler roller 202 due to deviation. Detachment will cause the ball 204 to lose driving force and lose its flattening function. Even if the conveyor belt makes slight contact with the second limiting ring 211, it will not produce rigid impact. When the PI film is conveyed, static electricity is generated due to friction. Static electricity will attract dust in the air or break down the ultra-thin PI film. The anti-static friction pad can conduct static electricity away in real time through grounding. In equipment requiring PI film in flexible electronics and new energy applications, such as flexible circuit board coating machines and lithium battery separator lamination equipment, this anti-wrinkle mechanism works in conjunction with longitudinal elastic tension and transverse friction flattening. A 60Si2Mn spring 108 between the mounting bracket 102 and the mounting base 103 provides dynamic longitudinal tension, which, combined with the precise guidance of the 45# steel guide rod 106 and the H62 brass sleeve 107, compensates for fluctuations in the PI film conveying speed, preventing longitudinal slack or excessive stretching. A micro servo motor 205 suspended inside the tension roller 101 drives the PI film through a GCr15 conical wheel set. U-shaped roller 202 drives the nylon-based conductive silicone conveyor belt to move in opposite directions. The anti-static friction pad on the outer wall of the conveyor belt rubs against the GCr15 balls 204, causing the balls 204 to roll axially to both sides along the tension roller 101, applying a uniform lateral friction force to the PI film and eliminating wrinkles caused by uneven lateral shrinkage stress. At the same time, the PU limiting ring restricts the film from deviating from the conveyor belt. The hollow 40Cr support shaft 105 carries the motor 205 cable, and the irregular plate 206 suspends the motor 205, ensuring that there is no interference between the components. Finally, the PI film is conveyed smoothly to meet the requirements of subsequent high-precision coating.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wrinkle-resistant mechanism for a diaphragm coating machine, characterized in that: include, The tensioning structure (100) includes a hollow tensioning roller (101) and support shafts (105) located at both ends of the tensioning roller (101). The anti-wrinkle structure (200) includes two sets of balls (204) rotatably mounted on the outer wall of the tension roller (101) in a ring array, a frame (201) symmetrically distributed inside the tension roller, rollers (209) rotatably mounted inside the frame (201) in an equidistant distribution, a support roller (202) sleeved on the outer wall of the roller, and a conveyor belt sleeved on the outer wall of the support roller (202). The frame (201) is connected to the irregular plate (206) inside the support shaft (105) by bolts and is suspended inside the tension roller (101).

2. The anti-wrinkle mechanism for a diaphragm coating machine according to claim 1, characterized in that: The tension roller (101) is sleeved with a mounting base (103) on the outside. Bearing seats (109) are provided on both sides of the lower end of the mounting base (103). The support shaft (105) is rotatably installed inside the bearing seats (109).

3. The anti-wrinkle mechanism for a diaphragm coating machine according to claim 2, characterized in that: A mounting bracket (102) is provided above the mounting base (103). A symmetrically distributed spring (108) is provided between the mounting base (103) and the mounting bracket (102). A symmetrically distributed sliding sleeve (107) is embedded inside the upper end of the mounting bracket (102). A symmetrically distributed guide rod (106) is provided at the upper end of the mounting base (103) and located inside the spring (108), with its upper end slidably inserted into the sliding sleeve (107).

4. The anti-wrinkle mechanism for a diaphragm coating machine according to claim 1, characterized in that: The tension roller (101) is equipped with a motor (205), and the output end of the motor (205) is equipped with a rotating shaft (207). One end of the rotating shaft (207) is equipped with a conical wheel (208), and the outer wall of the roller shaft (209) is fitted with a conical wheel (210) that meshes with the conical wheel (208).

5. The anti-wrinkle mechanism for a diaphragm coating machine according to claim 4, characterized in that: The support shaft (105) is hollow inside. The outer wall of the motor (205) is fitted with a special-shaped plate (206) that is suspended at the center of the support shaft (105) and connected to the bearing seat (109) at one end. One end of the special-shaped plate (206) is connected to the frame (201).

6. The anti-wrinkle mechanism of a diaphragm coating machine according to claim 1, characterized in that: The outer wall of the idler roller (202) is fitted with symmetrically distributed limiting rings two (211) located outside the belt (203). The outer walls of both ends of the tension roller (101) are fitted with symmetrically distributed limiting rings one (104). The corners of the conveyor belt are arc-shaped. The outer wall of the conveyor belt is provided with anti-static friction pads.

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