Film flattening device

Abstract

The present invention is a film flattening device, which relates to the field of film production equipment and is designed to solve the problem that the flattening consistency of the traditional flattening method is poor and easy to cause damage to the film. The film flattening device includes at least two flattening modules, and each flattening module is respectively arranged on both sides of the film width direction. Each flattening module includes a clamping device for clamping the film, and each clamping device can provide traction to the film during the film running process, and each traction force is directed to the edge of the film on the corresponding side of the clamping device. The film flattening device provided by the present invention is used for flattening a film.

Description

Technical Field

[0001] The present invention relates to the field of film production equipment, in particular to a film flattening device. Background Art

[0002] Competition in the lithium-ion battery separator market is fierce both domestically and internationally. While production continues to rise, unit prices continue to decline. To survive and remain competitive in this fiercely competitive environment, companies must not only increase R&D investment and enhance the technological content of their separator products, but also improve the effective utilization of the membranes, thereby increasing product yields, reducing losses, and lowering costs.

[0003] During the processing of lithium-ion battery separators, defects such as wrinkles, marks, and poor air permeability are the main factors affecting product yield. Wrinkles are particularly common during the lamination of multilayer films, leading to product rejection and increased scrap rates. Uneven transverse thickness of the base film, poor venting during the lamination process, and excessive tension control can all lead to longitudinal wrinkling and wrinkling.

[0004] To address the wrinkle problem in film, the traditional method in the industry is to use a curved roller device, which uses the curved shape of the curved roller, which is high in the middle and low on both sides, to forcefully flatten the film. However, the process of flattening the film with the curved roller has the following two major drawbacks: First, due to the inherent curved characteristics of the curved roller, there is a height difference in the axial direction, which causes uneven lateral force on the film, resulting in uneven lateral deformation of the product, and ultimately affecting the consistency of the product's lateral performance; second, during the process of flattening the film with the curved roller, the film must be in contact with the curved roller surface throughout its entire width. This will inevitably damage the film surface, thereby affecting the film's quality. Summary of the Invention

[0005] The first object of the present invention is to provide a film flattening device to solve the technical problems of poor flattening consistency and easy damage to the film in traditional flattening methods.

[0006] The film flattening device provided by the present invention comprises at least two flattening modules, and each of the flattening modules is respectively arranged on both sides in the width direction of the film.

[0007] Each of the flattening modules includes a clamping device for clamping the film. Each of the clamping devices can provide traction to the film during its running process. Each of the traction forces is directed to the edge of the film on the corresponding side of the clamping device.

[0008] Furthermore, the edge clamping device includes an upper pressing roller and a lower pressing roller for clamping the film, and the axes of the upper pressing roller and the lower pressing roller are arranged parallel to each other.

[0009] The upper pressing roller and the lower pressing roller are pivotally connected to the lower pressing roller seat, and the lower pressing roller seat is installed on the frame. The lower pressing roller seat can rotate relative to the frame with the vertical axis as the center, so that the axis of the upper pressing roller forms an acute angle with the running direction of the film.

[0010] Furthermore, the frame includes a support, which is sleeved on the support rod, and the support can slide on the support rod along the width direction of the film.

[0011] The support rod is also provided with a fixing component for fixing the position of the support.

[0012] Furthermore, the lower pressure roller seat is rotatably connected to the support via a pin, and the axis of the pin is vertical.

[0013] The support is provided with a limiting member for limiting the position of the lower pressing roller seat after rotation.

[0014] Furthermore, the support includes relatively arranged side edges, and the limiting member includes a limiting screw arranged on each of the side edges. Each of the limiting screws is screwed onto the side edges and pressed against the lower pressure roller seat to limit the position of the lower pressure roller seat after rotation.

[0015] Furthermore, it also includes an upper pressure roller seat, which is slidably installed on the lower pressure roller seat, and the sliding direction is vertical, and the upper pressure roller is pivotally connected to the upper pressure roller seat.

[0016] Furthermore, it also includes a pre-tightening device for adjusting the pressing force between the upper pressing roller and the lower pressing roller.

[0017] Furthermore, the pre-tightening device includes a tension spring and an adjustment component for adjusting the elongation of the tension spring. The tension spring is arranged between the upper pressure roller seat and the lower pressure roller seat, one end of which is fixedly connected to the lower pressure roller seat, and the other end of which is movably connected to the upper pressure roller seat through the adjustment component.

[0018] Furthermore, the adjustment assembly includes an adjustment rod and an adjustment nut, the adjustment rod includes a screw portion and a hanging ear portion for connecting to the tension spring, the screw portion passes through the upper pressure roller seat from bottom to top and is screwed into the adjustment nut, and the adjustment nut is in tight contact with the upper surface of the upper pressure roller seat.

[0019] Alternatively, the pre-tightening device comprises a cylinder.

[0020] The cylinder body of the cylinder is fixedly connected to the lower pressure roller seat, and the piston rod is fixedly connected to the upper pressure roller seat.

[0021] The beneficial effects brought about by the film flattening device of the present invention are:

[0022] By arranging flattening modules on both sides of the film in the width direction, wherein the flattening module includes a clamping device for clamping the film, the clamping device can provide traction for the film during the film running process, and each traction force is directed to the edge of the film on the corresponding side of the clamping device.

[0023] When the film flattening device is working, under the action of the edge clamping device, the film is subjected to a traction force toward the outside of the film during the film running process, so as to pull the film to both sides, thereby weakening or even eliminating the longitudinal wrinkles of the film caused by the longitudinal tensile stress, thereby achieving the flattening of the film.

[0024] The film flattening device can effectively and fully flatten the film without damaging the quality of the film. It can not only flatten a single-layer film, but also flatten a multi-layer film. While ensuring production quality, it also greatly improves production efficiency. Moreover, the film flattening device flattens the film with the help of traction on both sides of the film, and the flattening consistency is high, which greatly improves the unfavorable situation of poor lateral consistency in the arc roller flattening process. Moreover, during the flattening process of the film, the flattening module can be set at any position in the width direction of the film, and the installation position is flexible, and the requirements for the factory layout are low. In addition, the film flattening device has a simple structure and the solution is easy to implement, which is of great significance for the flattening process in the production process of battery separators. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the main structure of a flattening module in a film flattening device according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 The right view structural diagram of the flattening module;

[0028] Figure 3 This is a schematic diagram of the main structure of a film flattening device according to an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A schematic diagram of the top view of the structure of the film flattening device;

[0030] Figure 5This is a schematic diagram of the main structure of another film flattening device according to an embodiment of the present invention.

[0031] Icons: 10-support rod; 20-support; 30-pin; 40-tension spring; 50-adjusting rod; 60-adjusting nut; 70-lower pressure roller seat; 80-upper pressure roller seat; 90-guide device; 100-upper pressure roller; 110-lower pressure roller; 120-limiting screw; 130-locking nut; 140-fixing screw; 150-film; 160-cylinder; 170-connecting part; 11-slide; 51-screw part; 52-ear part. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "up", "down", "vertical", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] like Figures 1-4 As shown, this embodiment provides a film flattening device comprising at least two flattening modules, one disposed on each side of the width of a film 150. Specifically, each flattening module comprises a clamping device for clamping the film 150. Each clamping device can provide traction to the film 150 during its running process, with each traction force directed toward the edge of the film 150 on the corresponding side of the clamping device.

[0036] When the film flattening device is working, under the action of the clamping device, the film 150 is subjected to a traction force toward the outside of the film 150 during the film running process, so as to pull the film 150 to both sides, thereby weakening or even eliminating the longitudinal wrinkles generated by the longitudinal tensile stress of the film 150, thereby achieving the flattening of the film 150.

[0037] The film flattening device can effectively and fully flatten the film 150 without damaging the quality of the film 150. It can not only flatten a single-layer film 150, but also flatten a multi-layer film 150. While ensuring production quality, it also greatly improves production efficiency. Moreover, the film flattening device flattens the film 150 by means of traction on both sides of the film 150. The flattening consistency is high, which greatly improves the unfavorable situation of poor lateral consistency that occurs during the arc roller flattening process. Moreover, during the flattening process of the film 150, the flattening module can be set at any position in the width direction of the film 150. The installation position is flexible and the requirements for the factory layout are low. In addition, the film 150 flattening device has a simple structure and the solution is easy to implement. It is of great significance for the flattening process in the production process of battery separators.

[0038] It should be noted that, in this embodiment, the “film running direction” refers to the longitudinal direction of the film 150, i.e. Figure 4 The arrow direction of the middle portion includes an angle α with the axis of the upper pressing roller 100 .

[0039] Please continue to refer to Figure 3 and Figure 4 In this embodiment, the flattening modules are arranged in pairs. Specifically, the flattening modules can be symmetrically arranged on both sides of the width direction of the film 150. This arrangement ensures that the film 150 is subjected to symmetrical pulling forces F during the film running process, further ensuring the consistency of the film 150 in the lateral direction, thereby improving the operating reliability of the film flattening device of this embodiment.

[0040] It should be noted that, in this embodiment, multiple pairs of flattening modules may be provided according to the longitudinal length of the film 150 to further ensure the flattening reliability of the film 150 .

[0041] Please continue to refer to Figures 1-4 In this embodiment, the clamping device includes an upper pressing roller 100 and a lower pressing roller 110 for clamping the film 150. The axes of the upper pressing roller 100 and the lower pressing roller 110 are arranged parallel to each other. Specifically, the upper pressing roller 100 and the lower pressing roller 110 are pivotally connected to a lower pressing roller seat 70, which is mounted on a frame. The lower pressing roller seat 70 can rotate relative to the frame about a vertical axis, so that the axis of the upper pressing roller 100 forms an acute angle with the film running direction of the film 150.

[0042] In this embodiment, both the upper and lower pressure rollers 100 and 110 include a roller shaft, a roller wheel, and a pair of bearings. Specifically, the roller shaft of the lower pressure roller 110 is fixedly mounted on the lower pressure roller seat 70, the bearing is fixedly sleeved on the roller shaft, and the roller wheel is fixedly sleeved on the outer ring of the bearing, thereby achieving the pivotal installation of the lower pressure roller 110 on the lower pressure roller seat 70. The structure of the upper pressure roller 100 is similar to that of the lower pressure roller 110, the only difference being that the upper pressure roller 100 is pivotally fixed to the upper pressure roller seat 80, so it will not be described in detail.

[0043] During the flattening process, the film 150 is clamped by the upper and lower pressure rollers 100, 110, subjecting it to a traction force F perpendicular to the axes of the upper and lower pressure rollers 100, 110. This traction force F acts on both sides of the width of the film 150, flattening the film 150. The pivotal connection between the upper and lower pressure rollers 100, 110 significantly reduces friction during contact between the film 150 and the upper and lower pressure rollers 100, 110, thereby minimizing damage to the film surface and further improving the reliability of the film flattening device of this embodiment.

[0044] In addition, by adjusting the relative angle between the lower pressing roller seat 70 and the film 150 , the direction of the traction force F can be controlled to maximize the flattening effect of the film 150 .

[0045] Please continue to refer to Figures 1-4 In this embodiment, the frame may include a support 20, which is sleeved on the support rod 10 and can slide on the support rod 10 along the width direction of the film 150. The support rod 10 is also provided with a fixing component for fixing the position of the support 20.

[0046] In this embodiment, the fixing assembly includes a fixing screw 140. Specifically, the support 20 is provided with a through hole along the width direction of the film 150, and the support rod 10 is inserted into the through hole. In addition, a slide groove 11 is provided on the side of the support rod 10, and a threaded hole is provided on the side of the support 20. The fixing screw 140 is screwed into the threaded hole and pressed against the slide groove 11. When the position of the support 20 needs to be adjusted, the fixing screw 140 is loosened to allow the support 20 to slide freely relative to the support rod 10 along the width direction of the film 150; when the position of the support 20 is adjusted, the fixing screw 140 is tightened so that it is tightly pressed against the slide groove 11 to limit the position of the support 20.

[0047] The adjustable setting of the support 20 allows the operator to adjust the length of the pressed film 150 in the width direction of the film 150, thereby ensuring the flattening effect.

[0048] It should be noted that in this embodiment, there can be only one threaded hole, and the fixing screw 140 is provided in a matching manner with the threaded hole. In order to ensure the stability of the support 20 after being limited, multiple threaded holes and multiple matching fixing screws 140 can also be provided, as long as they can achieve the fixation of the support 20 after the lateral position is adjusted.

[0049] Please continue to refer to Figures 1-4 In this embodiment, the lower pressure roller seat 70 is rotatably connected to the support 20 via a pin 30, wherein the axis of the pin 30 is vertical. In addition, a limiter is provided on the support 20 for limiting the position of the lower pressure roller seat 70 after rotation.

[0050] Please continue to refer to Figures 1-4 In this embodiment, the support 20 includes opposing side edges, and the limiting members include limiting screws 120 disposed on each side edge. Each limiting screw 120 is screwed onto the side edge and abuts against the lower pressure roller seat 70 to limit the position of the lower pressure roller seat 70 after rotation. In this embodiment, the limiting screws 120 can be symmetrically disposed on opposing side edges of the support 20.

[0051] Specifically, in this embodiment, a groove is provided on the upper surface of the support 20, and the lower pressure roller seat 70 is "L"-shaped. The horizontal edge of the "L"-shaped lower pressure roller seat 70 is placed in the above-mentioned groove, and the width of the groove is greater than the width of the horizontal edge, so as to provide sufficient space for the rotation of the lower pressure roller seat 70.

[0052] When it is necessary to adjust the angle between the axis of the lower pressure roller 110 and the film running direction, loosen the limit screw 120, and then rotate the lower pressure roller seat 70 around the pin 30; after the lower pressure roller seat 70 is rotated to the required position, tighten the limit screws 120 on both sides of the support 20 to press it against the lower pressure roller seat 70, and with the assistance of the pin 30, the position of the lower pressure roller seat 70 can be fixed.

[0053] Please continue to refer to Figure 2 In this embodiment, each limit screw 120 may also be provided with a matching lock nut 130. Specifically, the lock nut 130 is screwed onto the limit screw 120 and abuts against the side of the support 20. After the lower pressure roller seat 70 is limited by the limit screw 120, the lock nut 130 can be tightened to reduce the adverse situation of the lower pressure roller seat 70 shaking caused by loosening the limit screw 120.

[0054] Please continue to refer to Figure 1-Figure 3 In this embodiment, the film flattening device may further include an upper pressure roller seat 80 . Specifically, the upper pressure roller seat 80 is slidably mounted on the lower pressure roller seat 70 , and the sliding direction is vertical, and the upper pressure roller 100 is pivotally connected to the upper pressure roller seat 80 .

[0055] Specifically, in this embodiment, a guide device 90 for sliding guidance can be set between the upper pressure roller seat 80 and the lower pressure roller seat 70, and the guide device 90 includes a linear guide rail and a slider slidably connected thereto, wherein the linear guide rail is fixedly connected to the side wall of the lower pressure roller seat 70, and the slider is fixedly connected to the side wall of the upper pressure roller seat 80. The relative sliding of the upper pressure roller seat 80 and the lower pressure roller seat 70 in the vertical direction can be achieved by utilizing the sliding cooperation between the slider and the linear guide rail.

[0056] It should be noted that, in this embodiment, the guiding device 90 can be a structural form in which the above-mentioned linear guide rail is fixedly connected to the lower pressure roller seat 70 and the slider is fixedly connected to the upper pressure roller seat 80, but it is not limited to this. Other structural forms can also be adopted, such as: the linear guide rail is fixed on the upper pressure roller seat 80 and the slider is fixed on the lower pressure roller seat 70. As long as the setting form of the guiding device 90 is used, the sliding connection and guidance between the upper pressure roller seat 80 and the lower pressure roller seat 70 can be achieved.

[0057] Please continue to refer to Figures 1-4 In this embodiment, the film flattening device may further include a pre-tensioning device for adjusting the pressing force between the upper pressure roller 100 and the lower pressure roller 110. Specifically, the pre-tensioning device includes a tension spring 40 and an adjustment assembly for adjusting the extension of the tension spring 40. The tension spring 40 is disposed between the upper pressure roller seat 80 and the lower pressure roller seat 70. One end of the tension spring 40 is fixedly connected to the lower pressure roller seat 70, and the other end is movably connected to the upper pressure roller seat 80 via the adjustment assembly.

[0058] Specifically, the adjustment assembly may include an adjustment rod 50 and an adjustment nut 60, wherein the adjustment rod 50 includes a screw portion 51 and a hook portion 52 for connecting to the tension spring 40, and the screw portion 51 passes through the upper pressure roller seat 80 from bottom to top and is screwed into the adjustment nut 60, so that the adjustment nut 60 is in close contact with the upper surface of the upper pressure roller seat 80.

[0059] When the pressing force between the upper pressure roller 100 and the lower pressure roller 110 needs to be adjusted, the adjusting nut 60 can be rotated. By utilizing the spiral transmission relationship between the screw portion 51 and the adjusting nut 60, the rotation of the adjusting nut 60 is converted into the vertical feed of the screw portion 51, thereby extending the tension spring 40. At this time, the tension spring 40 has an elastic restoring force. According to Hooke's law, the magnitude of the elastic restoring force is proportional to the elongation. Therefore, the greater the elongation of the tension spring 40, the greater the elastic restoring force, and the greater the pressing force between the upper pressure roller 100 and the lower pressure roller 110. Utilizing this characteristic of the tension spring 40, it is possible to achieve preload adjustment between the upper pressure roller 100 and the lower pressure roller 110.

[0060] It should be noted that in this embodiment, under the action of its own gravity, the upper pressure roller 100 maintains contact with the lower pressure roller 110, pressing the film 150 tightly. The term "tension spring" refers to a spring that is constantly in tension. During the flattening process, the film 150 is subjected to the combined effects of the upper pressure roller 100's gravity and the elastic restoring force of the tension spring 40. As the tension spring 40 continues to stretch, the upper pressure roller 100 remains in contact with the lower pressure roller 110, and the elastic restoring force increases with the amount of elongation. This allows for adjustment of the pressing force between the upper and lower pressure rollers 100, 110.

[0061] By providing the pre-tightening device, the pressing force of the film 150 can be adjusted, so that the operator can select the appropriate pressing force according to the characteristics of the film 150 to fully ensure the flattening effect.

[0062] In this embodiment, the adjusting rod 50 may be a sheep's eye screw.

[0063] It should be noted that, in this embodiment, the pre-tightening device may be the structure of the tension spring 40, but is not limited thereto and may also be other structures, such as the cylinder 160. Specifically, Figure 5 As shown, the cylinder body of the cylinder 160 is fixedly connected to the lower pressure roller seat 70 , and the piston rod is fixedly connected to the upper pressure roller seat 80 .

[0064] By disposing a cylinder 160 between the upper and lower roller mounts 80 and 70, and utilizing the extension and retraction of the piston rod, not only can the pressing force between the upper and lower rollers 100, 110 be adjusted, but the upper and lower rollers 100 can also be lifted and separated for maintenance. Furthermore, the cylinder 160 is powered by air, a widely available and relatively clean source that essentially does not contaminate the film 150.

[0065] In addition, in this embodiment, a connecting piece 170 can be further provided between the piston rod of the cylinder 160 and the upper pressure roller seat 80. The connecting piece 170 plays the role of conversion connection, is easy to assemble, and enables the power of the cylinder 160 to be smoothly transmitted to the upper pressure roller 100.

[0066] The flattening process of the film flattening device is as follows: Figure 4As shown, first, the lower pressure roller seats 70 on both sides of the film 150 in the width direction are adjusted, rotating them around the pin 30 to a certain angle. Then, the limit screws 120 on the support 20 are tightened so that their free ends abut against the lower pressure roller seats 70, and the lock nuts 130 are tightened so that they tightly abut against the side edges of the support 20. At this point, the angle α between the axis of the upper pressure roller 100 and the film running direction is; simultaneously, the upper end position of the lower pressure roller seat 70 in the width direction of the film 150 can be adjusted using the set screws 140. Subsequently, the pressing force between the upper and lower pressure rollers 100, 110 can be adjusted using the preload device. During the film 150 running process, the film 150 is subjected to a pulling force F perpendicular to the roller axis on both sides of the film 150, pulling the film 150 to the sides, thereby weakening or eliminating wrinkles caused by the longitudinal tensile stress of the film 150, thereby achieving the purpose of flattening.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A film flattening device, characterized in that: It comprises at least two flattening modules, each of which is arranged on two sides of the film (150) in the width direction; Each of the flattening modules comprises a clamping device for clamping the film (150), each of the clamping devices being capable of providing traction to the film (150) during its film running process, each of the traction forces being directed to an edge of the film (150) on a side corresponding to the clamping device; The edge clamping device comprises a lower pressure roller seat, an upper pressure roller seat, and an upper pressure roller (100) and a lower pressure roller (110) for clamping the film (150); The upper pressure roller seat (80) is slidably mounted on the lower pressure roller seat (70), and the sliding direction is vertical; the upper pressure roller (100) is pivotally connected to the upper pressure roller seat (80), and the lower pressure roller (110) is pivotally connected to the lower pressure roller seat (70); the axes of the upper pressure roller (100) and the lower pressure roller (110) are arranged in parallel; A pre-tightening device for adjusting the pressing force between the upper pressing roller (100) and the lower pressing roller (110) is provided between the upper pressing roller (100) and the lower pressing roller (110); The pre-tightening device comprises a tension spring (40) and an adjusting component for adjusting the elongation of the tension spring (40); the tension spring (40) is arranged between the upper pressure roller seat (80) and the lower pressure roller seat (70), one end of the tension spring is fixedly connected to the lower pressure roller seat (70), and the other end is movably connected to the upper pressure roller seat (80) through the adjusting component; The adjusting assembly comprises an adjusting rod (50) and an adjusting nut (60); the adjusting rod (50) comprises a screw portion (51) and a hanging ear portion (52) for connecting with the tension spring (40); the screw portion (51) passes through the upper pressure roller seat (80) from bottom to top and is screwed into the adjusting nut (60); the adjusting nut (60) is in close contact with the upper surface of the upper pressure roller seat (80); The lower pressing roller seat (70) is installed on the frame, and the lower pressing roller seat (70) can rotate relative to the frame with the vertical axis as the center, so that the axis of the upper pressing roller (100) forms an acute angle with the film running direction of the film (150); The frame includes a support (20), the support (20) includes oppositely arranged side edges, each of the side edges is provided with a limit screw (120), each of the limit screws (120) is screwed onto the side edge and pressed against the lower pressure roller seat (70), so as to limit the position of the lower pressure roller seat (70) after rotation; The support (20) is sleeved on the support rod (10), and the support (20) can slide on the support rod (10) along the width direction of the film (150); the support rod (10) is also provided with a fixing component for fixing the position of the support (20); the fixing component includes a fixing screw (140); the support (20) is provided with a through hole along the width direction of the film (150), the support rod (10) is inserted into the above-mentioned through hole, the side of the support rod (10) is provided with a slide groove (11), the side of the support (20) is provided with a threaded hole, and the fixing screw (140) is screwed into the threaded hole and can be tightly pressed against the slide groove (11).

2. The film flattening device according to claim 1, characterized in that: The lower pressure roller seat (70) is rotatably connected to the support (20) via a pin (30), and the axis of the pin (30) is vertical.

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