A high-precision tracking roller mechanism

Abstract

The application relates to a high-precision tracking roller mechanism which comprises a tracking roller mechanism frame body, two tracking roller wall plates, a rotating shaft, a supporting shaft, a through shaft and a supporting beam, the two tracking roller wall plates are oppositely arranged, the supporting shaft and the rotating shaft are fixed at the outer sides of the two tracking roller wall plates respectively, the supporting shaft and the rotating shaft are oppositely arranged, the tracking roller wall plates can rotate along the axes of the supporting shaft and the rotating shaft, the through shaft and the supporting beam are fixed between the two tracking roller wall plates, and the two ends of the through shaft are fixedly connected with the supporting shaft and the rotating shaft respectively; a tracking roller mechanism roller system is arranged between the two tracking roller wall plates and comprises a flattening roller, a passing roller, a tracking roller and a roller sleeve, and the roller sleeve is sleeved on the through shaft. The through shaft which is a power transmission shaft is arranged between the rotating shaft and the supporting shaft, the torque of the rotating shaft is not transmitted by the tracking roller wall plates, the swing precision of the swing frame is improved, the folding area at the two ends of the coiled material is reduced, and the winding effect of the winding shaft is improved.

Description

Technical Field

[0001] This application relates to the field of vacuum coating auxiliary equipment, and in particular to a high-precision tracking roller mechanism. Background Technology

[0002] In fields such as vacuum sputtering coating and vacuum evaporation coating, a tracking roller mechanism is usually added before the take-up shaft to minimize the impact of the wrap angle and the length of the suspended film on the take-up shaft's winding tension.

[0003] While existing tracking roller mechanisms have improved the impact of wrap angle and suspended film length on the winding tension of the take-up shaft to some extent, if the substrate to be wound is a 0.8-5µm thick BOPP or PET flexible ultrathin film, vacuum sputtering or vacuum evaporation winding coating will result in a thicker coating in the middle area of ​​the film compared to the white edges at both ends (due to limitations of existing vacuum winding coating processes, there will be a certain width of uncoated white edge area on both sides of the film). The coating heat in the middle area is relatively high, and the thermal deformation of the film in the middle area is higher than that in the uncoated areas at both ends. Therefore, wrinkles will inevitably appear at both ends of the roll during the winding process, and wrinkles often begin to appear when the film is wound to about a few hundred meters to a thousand meters.

[0004] This is because existing tracking roller mechanisms generally adopt a three-section structure of rotating shaft + detachable frame + support shaft for ease of processing and maintenance. The detachable frame is assembled from two side panels, several support beams, and a counterweight beam, typically secured with bolts. The torque on the rotating shaft is first transmitted to one side panel, and then through the support beams to the other side panel. Over long-term operation, the positions of the two side panels will gradually shift due to the torque. Furthermore, the winding tension will further increase the frame's offset, causing the swing frame's accuracy to exceed tolerances. Therefore, the winding wrinkle area may exceed the permissible range, leading to frequent equipment downtime for maintenance. Summary of the Invention

[0005] In order to reduce the wrinkled areas at both ends of the roll and improve the winding effect of the roll, this application provides a high-precision tracking roller mechanism.

[0006] The high-precision tracking roller mechanism provided in this application adopts the following technical solution:

[0007] A high-precision tracking roller mechanism, comprising:

[0008] The tracking roller mechanism frame includes a tracking roller wall panel, a rotating shaft, a support shaft, a through shaft, and a support beam. Two tracking roller wall panels are arranged opposite each other. The support shaft and the rotating shaft are respectively fixed to the outer sides of the two tracking roller wall panels. The tracking roller wall panels can rotate along the axes of the support shaft and the rotating shaft. The through shaft and the support beam are fixed between the two tracking roller wall panels, and both ends of the through shaft are fixedly connected to the support shaft and the rotating shaft, respectively.

[0009] The tracking roller mechanism is arranged between the two tracking roller wall plates and includes a flattening roller, a guide roller, a tracking roller, and a roller sleeve, with the roller sleeve sleeved on the through shaft.

[0010] By adopting the above technical solution, the rotating shaft is the power input shaft of the high-precision tracking roller mechanism, and the through shaft is the power transmission shaft of the high-precision tracking roller mechanism. The torque on the rotating shaft can be directly transmitted to the support shaft on the other side of the tracking roller mechanism frame through the through shaft, which solves the drawback of torque transmission through the frame causing frame torsion deformation, thereby reducing the probability of the winding wrinkled area exceeding the permissible range and improving production efficiency.

[0011] Preferably, the two ends of the through shaft are machined into non-circular shafts, and the connecting shafts at both ends of the support shaft and the rotating shaft pass through the tracking roller wall plate. The end face of the connecting shaft is provided with an assembly hole that mates with the non-circular shaft.

[0012] By adopting the above technical solution, the middle of the through shaft is a round shaft, and the two ends are machined into non-circular shafts. By using the non-circular shafts to cooperate with the assembly holes, the axial degree of freedom of the through shaft is restricted, thereby realizing the axial positioning of the through shaft.

[0013] Preferably, both ends of the through shaft are fixed to the inner side of the tracking roller wall plate by clamps. The clamps are semi-open structures. The flange face of the rotating shaft, the tracking roller wall plate, and the clamps are connected by horizontally penetrating connectors. The flange face of the support shaft, the tracking roller wall plate, and the clamps are connected by horizontally penetrating connectors.

[0014] The connecting shaft is embedded in the inner hole of the clamp, and the inner hole of the clamp extends inward to form a boss, which is embedded in a limiting groove opened circumferentially along the through shaft.

[0015] By adopting the above technical solution, the through shaft is fixed to the tracking roller wall plate by clamps. The through shaft can be quickly disassembled without dismantling the tracking roller mechanism. Specifically, after loosening the clamps on both sides, the rotating shaft and the support shaft are moved outward by a certain distance, and the through shaft can be removed from the tracking roller mechanism frame, making it easy to replace the roller sleeve installed on it. The inner hole side of the clamp is formed with a boss, which cooperates with the limiting groove of the through shaft to restrict the axial movement between the through shaft and the clamp. The clamps on both sides are fixed to the rotating shaft and the support shaft respectively, which further increases the connection strength of the through shaft.

[0016] Preferably, the tracking roller wall panel includes a horizontal section and an inclined section, the inclined section and the horizontal section are at an angle to each other, and the inclined section and the horizontal section are connected by a curved section. The tracking roller mechanism roller system is disposed on the horizontal section, a counterweight beam is connected to the inclined section, and a support beam is connected to the inclined section and the horizontal section.

[0017] By adopting the above technical solution, the tracking roller wall panel is designed as an irregular frame, so that the tracking roller mechanism frame forms a stable triangular structure, which can swing around the center of gravity of the axis of rotation, and the center of gravity of the whole is within the diameter of the axis of rotation. A counterweight beam is set on the inclined section, which on the one hand balances the mass at both ends of the swing frame axis and reduces the torque required for the swing frame to run, and on the other hand, it and several support beams are arranged in a triangular shape, making the swing frame structure more stable.

[0018] Preferably, there is a height difference between the middle section and the two ends of the tracking roller, and the two are connected by an inclined surface or a curved surface, so that the tracking roller has a dumbbell structure.

[0019] By adopting the above technical solution, the tracking roller has a dumbbell-shaped structure. The slightly larger ends stretch the loose film in the uncoated areas at both ends, making the deformation of the coated area in the middle of the film more consistent with the deformation of the uncoated areas at both ends. When the uncoated areas at both ends of the film are put into the winding shaft, they are stretched and straightened. For the special application scenario of vacuum coating of ultra-thin flexible substrates, it can have a better flattening effect on the white edge area of ​​the uncoated substrate, making the deformation of the coated area in the middle of the film more consistent with the deformation of the uncoated areas at both ends, thus solving the problem of wrinkling on both sides of the film during the existing winding process.

[0020] Preferably, the tracking roller includes an inner rigid layer and an outer elastic layer.

[0021] By adopting the above technical solution, the rigid layer can ensure the accuracy and rigidity of the tracking roller, and an elastic layer is added on the outside, which is suitable for flexible ultra-thin film substrates such as BOPP. The elastic layer on the surface of the tracking roller can effectively offset the slight fluctuations in winding tension, and the flattening effect is better than that of a tracking roller made of a single material.

[0022] Preferably, the two ends of the tracking roller are provided with structures including spiral grooves, coating, and sandblasting to increase the surface roughness at both ends.

[0023] By adopting the above technical solutions, various methods such as spiral grooves, spray coating, and sandblasting can increase the surface roughness at both ends, allowing the wrinkled white edge film at both ends to unfold outward under the action of friction, resulting in a better flattening effect.

[0024] Preferably, the tracking roller system further includes an active flattening structure, which includes a flattening roller drive pulley connected to an external driving force, a primary transmission belt connecting the flattening roller drive pulley and the through shaft, and a secondary transmission belt connecting the through shaft and the flattening roller.

[0025] By adopting the above technical solution, the flattening roller uses an active flattening form, which can achieve a better flattening effect. The tracking roller mechanism is used in a vacuum environment, and the flattening roller will swing in an arc with the tracking roller mechanism. It is advisable to use a two-stage belt drive to realize the active flattening roller. The first stage of the drive should be transmitted from the flattening roller drive pulley to the pulley on the through shaft. At this time, the power transmission can be unaffected by the swing of the tracking roller mechanism. The second stage of the drive is transmitted from the pulley on the through shaft to the pulley of the flattening roller, thus realizing the active flattening of the flattening roller.

[0026] Preferably, the tracking roller wall plate has a vertically arranged elongated oval through groove, and the two ends of the flattening roller are connected to mounting seats that can slide up and down along the through groove. Several adjusting components are arranged circumferentially around the flattening roller, and each adjusting component abuts against the side wall of the flattening roller and can be controlled to extend a certain displacement to make the flattening roller move up and down along the through groove.

[0027] By adopting the above technical solution, the installation position of the flattening roller can be finely adjusted. When the flattening roller is moved upward using the adjusting component, the film pressure is smaller and the wrap angle is smaller. When the flattening roller is moved downward using the adjusting component, the film pressure is larger and the wrap angle is larger. This facilitates process verification of the effect of different arc heights and wrap angles on film flattening.

[0028] Preferably, the adjusting members are also respectively provided around the flange face of the support shaft, the flange face of the rotating shaft, and the clamp in the circumferential direction. The adjusting members are used to adjust the perpendicularity between the through shaft, the rotating shaft, the support shaft and the tracking roller wall plate.

[0029] The adjusting component includes a locking block and a set screw. The sidewalls of the through shaft, the rotating shaft flange, and the support shaft flange are provided with set screw holes for engaging with the set screw.

[0030] By adopting the above technical solution, adjusting components are arranged in the circumference of the support shaft flange face, the rotating shaft flange face, and the clamp. The support shaft, rotating shaft, and through shaft are adjusted up and down by tightening the support shaft flange face, the rotating shaft flange face, and the side of the clamp with the set screw, thereby adjusting the perpendicularity between the through shaft, the rotating shaft, the support shaft and the tracking roller wall plate.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The traditional tracking roller mechanism has been redesigned with high precision using a through-shaft transmission structure, overcoming the problems of frame-based transmission, frame torsion deformation, and precision deviations during operation. The through-shaft is directly connected to the rotating shaft and support shaft via a square shaft and square hole, ensuring high assembly precision and large torque transmission. The through-shaft is also secured to the tracking roller wall plates on both sides with clamps for easy quick disassembly. The flattening roller can be arbitrarily installed in the slots of the tracking roller wall plates, and its positional accuracy is adjusted via locking blocks. This allows for small-amplitude, precise changes to the arc height and wrap angle of the flattening roller, improving the film flattening effect to a certain extent and facilitating process verification of the flattening effect of different flattening roller wrap angles on the film. Furthermore, the innovatively designed tracking roller structure, specifically designed for the special application of vacuum coating on ultra-thin flexible substrates, provides better flattening of the uncoated white edge areas of the substrate, making the deformation of the coated area in the middle of the film more consistent with the deformation of the uncoated areas at both ends, thus solving the problem of film wrinkling on both sides during the existing winding process.

[0033] 2. The through shaft is fixed to the inside of the tracking roller wall plate by clamps. The through shaft can be quickly disassembled without disassembling the tracking roller mechanism, making assembly more convenient. In addition, the clamps on both sides are fixed to the rotating shaft and the support shaft respectively, which further increases the connection strength of the through shaft.

[0034] 3. Through innovative design of the tracking roller structure, the tracking roller forms a dumbbell structure with large pins at both ends. The slightly larger ends will stretch the loose film in the uncoated areas at both ends, so that the deformation of the coated area in the middle of the film is consistent with the deformation of the uncoated areas at both ends. When the uncoated areas at both ends of the film are put into the take-up shaft, they are stretched and straightened. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this high-precision tracking roller mechanism.

[0036] Figure 2 This is a cross-sectional view of the high-precision tracking roller mechanism at the center of rotation.

[0037] Figure 3 This is a magnified view of the structure at the through shaft and support shaft.

[0038] Figure 4 This is an inner sectional view of a high-precision tracking roller mechanism.

[0039] Figure 5 This is a schematic diagram of the specific structure of the tracking roller.

[0040] Figure 6 A schematic diagram of the preferred structure for the tracking roller.

[0041] Figure 7 This is a schematic diagram of the active optimization structure for the flattening roller.

[0042] Explanation of reference numerals in the attached drawings: 1. Tracking roller mechanism frame; 11. Tracking roller wall panel; 111. Horizontal section; 112. Inclined section; 113. Curved section; 114. Through groove; 12. Rotating shaft; 13. Support shaft; 14. Through shaft; 141. Limiting groove; 142. Square shaft; 15. Clamp; 151. Boss; 152. Connecting piece; 16. Counterweight beam; 17. Support beam; 18. Connecting shaft; 181. Square hole; 19. Adjusting piece; 19 1. Locking block; 192. Top screw; 2. Tracking roller mechanism; 21. Flattening roller; 22. Passing roller; 23. Tracking roller; 231. Rigid layer; 232. Elastic layer; 233. Spiral groove; 24. Roller sleeve; 25. Active flattening structure; 251. Flattening roller drive pulley; 252. Primary transmission belt; 253. First pulley; 254. Secondary transmission belt; 255. Second pulley; 256. Tensioner; 26. Mounting base. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0044] This application discloses a high-precision tracking roller mechanism. (Refer to...) Figures 1-7 The high-precision tracking roller mechanism includes a tracking roller mechanism frame 1 and a tracking roller 23 mechanism roller system 2 mounted on the tracking roller mechanism frame 1.

[0045] Reference Figure 1 , Figure 2The tracking roller mechanism frame 1 includes a tracking roller wall plate 11, a rotating shaft 12, a support shaft 13, a through shaft 14, a clamp 15, a counterweight beam 16, and a support beam 17. Two tracking roller wall plates 11 are arranged opposite each other. The support shaft 13 and the rotating shaft 12 are respectively fixed to the outer sides of the two tracking roller wall plates 11. The through shaft 14, the counterweight beam 16, and the support beam 17 are fixed between the two tracking roller wall plates 11. The support shaft 13 and the rotating shaft 12 are arranged opposite each other, allowing the tracking roller mechanism 23 to rotate along the axes of the support shaft 13 and the rotating shaft 12. The ends of the support shaft 13 and the rotating shaft 12 pass through the tracking roller wall plates 11. Both the support shaft 13 and the rotating shaft 12 are fitted to the tracking roller wall plates 11 through shaft holes, fixed with screws, and positioned with pins. The two ends of the support shaft 13 and the rotating shaft 12 are fixedly connected by the through shaft 14. A through shaft 14 is added as a power transmission shaft between the rotating shaft 12 and the support shaft 13. The torque on the rotating shaft 12 can be directly transmitted to the support shaft 13 on the other side of the tracking roller mechanism frame 1 through the through shaft 14. The two tracking roller wall plates 11 are not affected by the torque of the rotating shaft 12, thereby greatly reducing the problem of the swing frame accuracy deviation, reducing the wrinkled areas at both ends of the roll, and improving the winding effect of the roll.

[0046] Reference Figure 2 and Figure 3 The through shaft 14 has a round shaft in the middle and non-circular shafts at both ends. The support shaft 13 and the rotating shaft 12 have connecting shafts 18 at both ends. The connecting shafts 18 pass through the tracking roller wall plate 11, and the end faces of the connecting shafts 18 are machined with mounting holes adapted to the non-circular shafts. The non-circular shafts can be square shafts 142, elliptical shafts, tapered shafts, polygonal irregular shafts, etc. By matching the non-circular shafts with the mounting holes, the axial freedom of the through shaft 14 is restricted, achieving axial positioning of the through shaft 14. This application uses the example of the through shaft 14 having both ends machined as square shafts 142, and the through shaft 14, support shaft 13, and rotating shaft 12 using square shafts 142 and square holes 181 for matching.

[0047] Reference Figure 3 To facilitate disassembly and assembly, both ends of the through shaft 14 are fixed to the inner side of the tracking roller wall plate 11 by clamps 15, allowing for quick disassembly of the through shaft 14 without disassembling the tracking roller 23 mechanism. Specifically, the clamps 15 are semi-open structures, abutting against the inner side of the tracking roller wall plate 11. The connecting shaft 18 is embedded in the inner hole of the clamp 15. The flange face of the rotating shaft 12 / the flange face of the support shaft 13, the tracking roller wall plate 11, and the clamp 15 are fixedly connected by a horizontally penetrating connector 152. After loosening the clamps 15 on both sides, the rotating shaft 12 and the support shaft 13 are moved outward by a certain distance, allowing the through shaft 14 to be removed from the tracking roller mechanism frame 1 for easy replacement of the roller sleeve 24 installed on it. Furthermore, a boss 151 extends inward from the inner hole side of the clamp 15, and the boss 151 is embedded in the limiting groove 141 opened circumferentially along the through shaft 14, thereby restricting the axial movement between the through shaft 14 and the clamp 15.

[0048] Reference Figure 3 The tracking roller mechanism frame 1 also includes adjusting members 19 to adjust the perpendicularity between the support shaft 13, rotating shaft 12, and through shaft 14 and the tracking roller wall plate 11. Multiple adjusting members 19 are arranged circumferentially around the flange faces of the support shaft 13, rotating shaft 12, and clamp 15. These multiple adjusting members 19 abut against the outer surfaces of the flange faces of the support shaft 13, rotating shaft 12, and clamp 15. By adjusting one adjusting member 19 to push it against the outer surfaces of the flange faces of the support shaft 13, rotating shaft 12, and clamp 15, the up-down and left-right movement of the support shaft 13, through shaft 14, and rotating shaft 12 is adjusted, thereby coarsely adjusting the installation position and perpendicularity of the support shaft 13, through shaft 14, and rotating shaft 12.

[0049] Specifically, in this application, the adjusting component 19 includes a locking block 191 and a set screw 192. The side walls of the flange faces of the through shaft 14, the rotating shaft 12, and the support shaft 13 are provided with set screw 192 holes for engaging with the set screw 192. By pressing the set screw 192 on the locking block 191 against the side of the flange of the rotating shaft 12, the side of the flange of the support shaft 13, or the side of the clamp 15 in different positions, small-scale precise adjustment can be achieved.

[0050] Reference Figure 1 and Figure 4 The tracking roller wall panel 11 includes a horizontal section 111 and an inclined section 112, which forms an angle with the horizontal section 111. The inclined section 112 and the horizontal section 111 are connected by a curved section 113. The tracking roller mechanism 2 is mounted on the horizontal section 111, the counterweight beam 16 is connected to the inclined section 112, and the support beam 17 is connected to both the inclined section 112 and the horizontal section 111. By designing the tracking roller wall panel 11 as an irregularly shaped frame, the tracking roller mechanism frame 1 forms a stable triangular structure, allowing it to swing around the center of gravity of the pivot 12, with the overall center of gravity within the diameter of the pivot 12. The counterweight beam 16 is mounted on the inclined section 112 to balance the mass at both ends of the pivot 12, reducing the torque required for the swing frame's operation. Furthermore, the counterweight beam 16, along with several support beams 17 on the curved section 113, forms a triangular arrangement, further stabilizing the swing frame structure.

[0051] Reference Figure 4 Preferably, the support beam 17 is designed with flanges at both ends and a round shaft in the middle. The flanges at both ends can be fixed in the square countersunk holes of the tracking roller wall plate 11. Compared with the common screw / pin fixing, the square shaft 142 and square hole 181 have higher fitting accuracy, strength and torsional resistance, ensuring that the tracking roller mechanism frame 1 will not twist and deform under the action of film tension.

[0052] Reference Figure 4The tracking roller mechanism 2 includes a flattening roller 21, a guide roller 22, a tracking roller 23, and a roller sleeve 24. The roller sleeve 24 is fitted onto the through shaft 14. The tracking roller 23 is located at the end of the tracking roller wall plate 11 furthest from the counterweight beam 16, followed by the guide roller 22, the flattening roller 21, and the through shaft 14 in sequence.

[0053] Reference Figure 5 and Figure 6 To improve the wrinkle area of ​​the roll material during winding, this application innovatively designs the structure of the tracking roller 23. The roller surface of the tracking roller 23 has a dumbbell-shaped structure, that is, it is large at both ends and small in the middle. There is a height difference between the middle section and the two ends of the tracking roller 23, and the middle section and the two ends are transitioned by a sloping surface or a rounded surface. By designing the tracking roller 23 into a dumbbell shape, the slightly larger ends will stretch the loose film in the uncoated areas at both ends, so that the deformation of the coated area in the middle of the film is more consistent with the deformation of the uncoated areas at both ends. When the uncoated areas at both ends of the film enter the winding shaft, they are stretched and straightened.

[0054] In actual production and debugging, in order to achieve the flattening effect, methods such as applying tape, wrapping film, sleeve, spraying, and welding to the ends of the straight roller are used to increase the diameter at both ends of the tracking roller 23. Similarly, methods such as processing the middle diameter of the tracking roller 23 to be smaller than the diameter at both ends are also included.

[0055] Among them, the height difference between the two ends of the tracking roller and The bevel transition angles A1 and A2 are primarily determined by the film material, thickness, and winding tension, depending mainly on the substrate coating thickness. Similarly, if a rounded transition is used, the radius also depends on the film material, thickness, and winding tension. In certain special cases, bevels and rounded transitions may not be necessary, such as in situations with height differences. , It is extremely small.

[0056] In practical implementation, the influence of various variables on film deformation should be fully considered. Since BOPP and PET films are only a few micrometers thick, for the sake of simplicity in explaining the patent's structural principle and ease of understanding for non-professionals, only the linear expansion coefficient α is used, ignoring the influence of the surface expansion coefficient β and volume expansion coefficient γ on film deformation. Furthermore, the temperature fluctuations in different areas within the vacuum chamber are significant, mainly influenced by the heat from target sputtering or evaporation, the cooling channel structure within the chamber, and the placement of the polycold. Here, the influence of the cooling channel structure and the polycold is ignored, and the temperature T0 within the vacuum chamber is treated as a constant to simplify calculations.

[0057] Since the effects of chamfers A1 and A2 on the thin film are complex to calculate and require extensive mechanical simulations and process experiments for verification, they are also ignored here. Furthermore, both sputtering and evaporation coatings have uniform regions, i.e., film thickness uniformity, involving electric, magnetic, and plasma fields; the influence of these uniform regions is also ignored here. Only the following parameters are considered: room temperature linear expansion coefficient α1, high temperature linear expansion coefficient α2, tracking roller minor diameter d0, single-sided coating thickness μ, vacuum chamber temperature T0, sputtering target or evaporation boat thermal radiation temperature T1, main drum temperature T2, main drum left side cooling guard plate temperature T3, left side cooling guard plate temperature T4, room temperature T5 (taken as 20℃), temperature difference Δt1 in the uncoated area on the left, temperature difference Δt2 in the coated area, temperature difference Δt3 in the uncoated area on the right, circumferential deformation amplitude δ1 in the uncoated area on the left, circumferential deformation amplitude δ2 in the coated area in the middle, and circumferential deformation amplitude δ3 in the uncoated area on the right.

[0058] Taking roll-to-roll double-sided coating as an example, to solve the problem of wrinkling on both sides of the wound film, it is only necessary to make the circumferential deformation amplitude of the film across the entire width tend to be consistent, i.e., δ1=δ2=δ3. Substituting the above parameters, we get:

[0059]

[0060]

[0061] Since thermal radiation is the primary thermal radiation within the vacuum chamber, heat conduction only occurs when the thin film is in close contact with the main drum and when the target material is sputtered or deposited onto the thin film. To avoid complex heat transfer calculations, the temperature rise of each region of the thin film is omitted here. The calculation process is as follows:

[0062]

[0063]

[0064] After deformation, we get:

[0065]

[0066]

[0067] This allows us to obtain the height difference between the two ends of the tracking roller. and .

[0068] Preferably, the structure of the tracking roller 23 can be further optimized. It still has a dumbbell shape, with large ends and a small middle, and uses a beveled or arc-shaped transition. However, the roller surface of the tracking roller 23 is composed of a rigid layer 231 and an elastic layer 232. For example, the rigid layer 231 can be a high-strength material such as metal or hard polymer material to ensure the accuracy and rigidity of the tracking roller 23. An elastic layer 232 is then wrapped on the outside, such as rubber, silicone, foam, etc., which is suitable for flexible ultra-thin film substrates such as BOPP. The elastic layer 232 on the surface of the tracking roller 23 can effectively offset the slight fluctuation of the winding tension. Compared with a tracking roller 23 made of a single material, the flattening effect is better.

[0069] Reference Figure 6 To enhance the flattening effect of the wrinkled areas, spiral grooves 233 can be created at both ends of the tracking roller 23. These spiral grooves 233 can help the wrinkled white edge film at both ends to unfold outwards. Similarly, creating spiral grooves 233 at both ends of the tracking roller 23 made of the same material can also enhance the flattening effect of the tracking roller 23. Other methods of changing the surface roughness of the roller can also achieve similar effects, such as sandblasting, ceramic coating, or Teflon coating at both ends.

[0070] Reference Figure 7 Preferably, to achieve better flattening effect, especially for wide-width film substrates, the tracking roller mechanism also includes an active flattening structure 25. The driven flattening can be designed as active flattening. Considering that the tracking roller 23 mechanism is used in a vacuum environment and the flattening roller 21 will swing in an arc with the tracking roller 23 mechanism, a two-stage belt drive is preferred to achieve active flattening of the flattening roller 21. The active flattening structure 25 includes a flattening roller 21 drive pulley connected to an external driving force, a primary transmission belt 252 connecting the flattening roller drive pulley 251 and the through shaft 14, and a secondary transmission belt 254 connecting the through shaft 14 and the flattening roller 21. The primary transmission is preferably driven by the flattening roller 21 to the first pulley 253 on the through shaft 14. At this time, the power transmission is not affected by the swing of the tracking roller 23 mechanism. The secondary transmission is then transmitted from the first pulley 253 on the through shaft 14 to the second pulley 255 of the flattening roller 21, realizing active flattening of the flattening roller 21.

[0071] To achieve smooth belt drive, a tensioner 256 must be used to tension the slack side of the belt. The V-belt in the diagram is for illustrative purposes only and can be replaced with a flat belt, synchronous belt, etc.

[0072] The tracking roller wall plate 11 has vertically arranged elongated oval slots 114. The two ends of the flattening roller 21 are connected to mounting seats 26 that can slide up and down along the slots 114. Several adjusting members 19 are also arranged at intervals around the circumference of the flattening roller 21. Each adjusting member 19 abuts against the side wall of the flattening roller 21 and can be controlled to extend a certain displacement to allow the flattening roller 21 to move up and down along the slots 114. This allows for fine-tuning of the installation position of the flattening roller 21. When the adjusting member 19 is used to adjust the flattening roller 21 upwards, the film pressure is smaller and the wrap angle is smaller. When the adjusting member 19 is used to adjust the flattening roller 21 downwards, the film pressure is larger and the wrap angle is larger, facilitating process verification of the effect of different arc heights and wrap angles on film flattening.

[0073] The implementation principle of a high-precision tracking roller mechanism in this application embodiment is as follows: The high-precision tracking roller mechanism of this application mainly consists of two parts: the tracking roller mechanism frame 1 and the tracking roller 23 mechanism roller system 2. The main body of the mechanism is arranged in a triangular stable structure and can swing around the center of gravity of the rotating shaft 12. The center of gravity of the whole is within the diameter range of the rotating shaft 12. The rotating shaft 12 serves as the power input shaft, and it is fitted with the through shaft 14 using a square shaft 142 and a square hole 181. The torque on the rotating shaft 12 can be directly transmitted to the support shaft 13 on the other side of the tracking roller mechanism frame 1 through the through shaft 14, which solves the drawback of torque transmission through the frame causing the frame to twist and deform.

[0074] By tightening the side of the flange of the rotating shaft 12, the side of the flange of the support shaft 13, and the side of the clamp 15 with the top screw 192 on the locking block 191 in different positions, the installation accuracy of the tracking roller 23 mechanism can be precisely adjusted.

[0075] The through shaft 14 is fixed by the clamp 15. The through shaft 14 can be removed without disassembling the tracking roller mechanism frame 1, making it easy to replace the roller sleeve 24 installed on it. In addition, the installation position of the flattening roller 21 in the roller system 2 of the tracking roller 23 mechanism can be finely adjusted, which is convenient for process verification of the flattening effect of different arc heights and wrap angles on the film. The tracking roller 23 structure is innovatively designed into a dumbbell shape for the special application scenario of vacuum coating of ultra-thin flexible substrates. Its slightly larger ends will stretch the loose film in the uncoated areas at both ends after the film passes through the tracking roller 23, so that the deformation of the coated area in the middle of the film is consistent with the deformation of the uncoated areas at both ends. When the uncoated areas at both ends of the film enter the take-up shaft, they are stretched and straightened. If composite materials or spiral groove structures are used, the wrinkled areas at both ends will have a better flattening effect, which perfectly solves the industry problem of wrinkling in vacuum winding coating of ultra-thin flexible substrates.

[0076] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision tracking roller mechanism, characterized in that: include: The tracking roller mechanism frame includes a tracking roller wall panel (11), a rotating shaft (12), a support shaft (13), a through shaft (14), and a support beam (17). Two tracking roller wall panels (11) are arranged opposite each other. The support shaft (13) and the rotating shaft (12) are respectively fixed on the outer side of the two tracking roller wall panels (11). The support shaft (13) and the rotating shaft (12) are arranged opposite each other. The tracking roller wall panel (11) can rotate along the axis of the support shaft (13) and the rotating shaft (12). The through shaft (14) and the support beam (17) are fixed between the two tracking roller wall panels (11), and the two ends of the through shaft (14) are respectively fixedly connected to the support shaft (13) and the rotating shaft (12). The tracking roller mechanism is arranged between the two tracking roller wall plates (11) and includes a flattening roller (21), a guide roller (22), a tracking roller (23) and a roller sleeve (24), wherein the roller sleeve (24) is sleeved on the through shaft (14); The two ends of the through shaft (14) are machined into non-circular shafts. The connecting shafts (18) at both ends of the support shaft (13) and the rotating shaft (12) pass through the tracking roller wall plate (11). The end face of the connecting shaft (18) is provided with assembly holes that cooperate with the non-circular shaft. The two ends of the through shaft (14) are fixed to the inner side of the tracking roller wall plate (11) by clamps (15). The clamps (15) are semi-open structures. The flange face of the rotating shaft (12), the tracking roller wall plate (11) and the clamps (15) are connected by a horizontally penetrating connector (152). The flange face of the support shaft (13), the tracking roller wall plate (11) and the clamps (15) are connected by a horizontally penetrating connector (152). The connecting shaft (18) is embedded in the inner hole of the clamps (15), and the inner hole side of the clamps (15) extends inward to form a boss (151). The boss (151) is embedded in the limiting groove (141) opened circumferentially along the through shaft (14). The tracking roller wall plate (11) has a vertically arranged elongated through groove (114). The two ends of the flattening roller (21) are connected to mounting bases (26) that can slide up and down along the through groove (114). Several adjusting members (19) are arranged circumferentially around the flattening roller (21). Each adjusting member (19) abuts against the side wall of the flattening roller (21) and can be controlled to extend a certain displacement so as to make the flattening roller (21) move up and down along the through groove (114). Adjusting components (19) are also provided around the flange face of the support shaft (13), the flange face of the rotating shaft (12), and the clamp (15) respectively. The adjusting components (19) are used to adjust the perpendicularity between the through shaft (14), the rotating shaft (12), the support shaft (13) and the tracking roller wall plate (11). The adjusting component (19) includes a locking block (191) and a set screw (192). The side walls of the flange faces of the through shaft (14), the rotating shaft (12), and the support shaft (13) are provided with set screw (192) holes for cooperating with the set screw (192).

2. The high-precision tracking roller mechanism according to claim 1, characterized in that: The tracking roller wall panel (11) includes a horizontal section (111) and an inclined section (112). The inclined section (112) forms an angle with the horizontal section (111), and the inclined section (112) and the horizontal section (111) are connected by a curved section (113). The tracking roller mechanism roller system is arranged on the horizontal section (111). A counterweight beam (16) is connected on the inclined section (112), and a support beam (17) is connected to the inclined section (112) and the horizontal section (111).

3. The high-precision tracking roller mechanism according to claim 1, characterized in that: There is a height difference between the middle section of the tracking roller (23) and the two ends of the tracking roller (23), and the two are connected by an inclined surface or a curved surface, so that the tracking roller (23) has a dumbbell structure.

4. The high-precision tracking roller mechanism according to claim 3, characterized in that: The tracking roller (23) includes an inner rigid layer (231) and an outer elastic layer (232).

5. The high-precision tracking roller mechanism according to any one of claims 3 or 4, characterized in that: The tracking roller (23) has structures at both ends, including spiral grooves (233), coating, and sandblasting, to increase the surface roughness at both ends.

6. The high-precision tracking roller mechanism according to claim 1, characterized in that: The tracking roller mechanism also includes an active flattening structure (25), which includes a flattening roller (21) drive pulley connected to an external driving force, a primary transmission belt (252) connected between the flattening roller drive pulley (251) and the through shaft (14), and a secondary transmission belt (254) connected between the through shaft (14) and the flattening roller (21).

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