Film surface smoothing and tension buffer mechanism
Patent Information
- Application Number
- CN202522666167.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-16
AI Technical Summary
然而，此类主动加压机构通常需要配备气泵、液压站或电动推杆等外部动力部件，导致设备结构复杂、成本提高，且存在控制环节多、维护需求较高等情况
[0037]本实用新型采用了由底板、左侧板和右侧板构成的机架结构，该结构能够为收卷机构提供稳定的安装基础；还采用了包括收卷辊和驱动电机的收卷机构，收卷辊通过轴承转动安装于侧板的安装孔中，能够保证收卷过程的平稳运行；还采用了与侧板滑动连接的滑动压板，该滑动压板在重力作用下其压辊部能压触于收卷辊上已卷绕的薄膜外表面，能够对膜卷施加持续的压力。整体而言，本实用新型能够通过重力自适应的机械结构实现对膜卷的持续压触，在简化设备结构与控制系统的同时，有助于展平薄膜并防止褶皱产生。
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Figure CN224930025U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical equipment technology for winding strips, and in particular to a film surface smoothing and tension buffering mechanism. Background Technology
[0002] Film winding is a common downstream process in packaging, printing, and composite material production, and its winding quality directly affects subsequent processing efficiency and yield. During the winding process, due to factors such as uneven film tension distribution, air entrapment, or the inherent characteristics of the material, defects such as wrinkles, curling edges, or misalignment can easily occur between film layers. These defects not only affect the appearance of the rolled film but may also cause problems such as poor film feeding and inaccurate positioning during subsequent high-speed filling or bag making. Therefore, how to effectively suppress wrinkle formation during the winding stage has become a technically significant issue in this field.
[0003] Various devices exist in the prior art for improving winding quality. For example, some film winding machines stabilize film conveying tension by setting guide rollers or tension regulating rollers along the winding path; others use pneumatically or hydraulically driven pressure roller mechanisms to apply pressure to the film roll surface during winding to expel interlayer air and increase winding tightness. However, such active pressure mechanisms usually require external power components such as air pumps, hydraulic stations, or electric push rods, resulting in complex equipment structures, increased costs, and numerous control points and high maintenance requirements.
[0004] Therefore, it is necessary to design a new type of film surface smoothing device with a simple structure that can achieve continuous pressure contact with the film roll, so as to improve the adaptability to different winding conditions while simplifying the equipment structure and control system. Utility Model Content
[0005] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a film surface smoothing and tension buffering mechanism. This mechanism has a simple structure and can achieve continuous pressure on the film roll, simplifying the equipment structure and control system while improving adaptability to different winding conditions.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] This utility model provides a membrane surface smoothing and tension buffering mechanism, comprising:
[0008] The frame includes a base plate, and a left side plate and a right side plate fixedly installed on both sides of the base plate; a left mounting hole is provided on the left side plate; and a right mounting hole is provided on the right side plate.
[0009] A winding mechanism for winding the film into a roll; the winding mechanism includes a winding roller and a drive motor; the left end of the winding roller shaft is rotatably mounted to the left mounting hole of the left side plate via a bearing, and the right end is rotatably mounted to the right mounting hole of the right side plate via a bearing; the output shaft of the drive motor is drively connected to the roller shaft of the winding roller.
[0010] A sliding pressure plate, which is slidably connected to at least one of the left side plate and the right side plate;
[0011] in,
[0012] The sliding pressure plate is configured such that, under the action of gravity, its pressure roller portion can press against the outer surface of the film already wound on the take-up roller, for flattening and preventing the film from wrinkling.
[0013] Furthermore, a left first sliding groove is formed on the left side plate; the projection of the left first sliding groove in the horizontal plane is located on the side of the take-up roller shaft closer to the film input direction;
[0014] A right first sliding groove is formed on the right side plate; the projection of the right first sliding groove in the horizontal plane is located on the side of the take-up roller shaft closer to the film input direction;
[0015] The sliding pressure plate has a left first slider on the side facing the left side plate; the left first slider and the left first sliding groove form a sliding pair;
[0016] The sliding pressure plate has a right first slider on the side facing the right side plate; the right first slider and the right first sliding groove form a sliding pair.
[0017] Furthermore, a second left sliding groove is further formed on the left side plate; the projection of the second left sliding groove in the horizontal plane is located on the side of the take-up roller shaft away from the film input direction;
[0018] A second right sliding groove is further formed on the right side plate; the projection of the second right sliding groove in the horizontal plane is located on the side of the take-up roller shaft away from the film input direction;
[0019] The sliding pressure plate has a left second slider further formed on the side facing the left side plate; the left second slider and the left second sliding groove form a sliding pair;
[0020] The sliding pressure plate has a right second slider further formed on the side facing the right side plate; the right second slider and the right second sliding groove form a sliding pair.
[0021] Furthermore, the sliding direction of the first left slider is parallel to the sliding direction of the second left slider;
[0022] The sliding direction of the right first slider is parallel to the sliding direction of the right second slider;
[0023] in,
[0024] Under the constraint of the sliding pair formed by the left first slider and the left first sliding groove, the left second slider and the left second sliding groove, the right first slider and the right first sliding groove, and the right second slider and the right second sliding groove, the sliding pressure plate only has the degree of freedom to move along the direction of gravity.
[0025] Furthermore, the single-sided clearance between the left first slider and the left first sliding groove is no greater than 1mm;
[0026] The single-sided clearance between the left second slider and the left second sliding groove is no greater than 1mm;
[0027] The clearance on one side between the right first slider and the right first sliding groove is no greater than 1mm;
[0028] The clearance on one side between the right second slider and the right second sliding groove is no greater than 1mm.
[0029] Furthermore, the winding mechanism further includes:
[0030] A displacement sensor is mounted on the left side plate or the right side plate, with its detection surface facing the sliding pressure plate, for real-time monitoring of the vertical displacement of the sliding pressure plate;
[0031] A controller, which is electrically connected to the displacement sensor and the drive motor;
[0032] The controller is configured as follows:
[0033] In response to the displacement data of the sliding pressure plate measured by the displacement sensor, the rotational speed of the drive motor is adjusted so that the winding speed of the outermost layer of film on the take-up roller is maintained within a predetermined range.
[0034] Furthermore, the output shaft of the drive motor is connected to the roller shaft of the take-up roller via a belt drive mechanism.
[0035] Furthermore, the output shaft of the drive motor is connected to the roller shaft of the take-up roller via a gear transmission mechanism.
[0036] This utility model has at least the following advantages or beneficial effects:
[0037] This invention employs a frame structure consisting of a base plate, a left side plate, and a right side plate, providing a stable mounting base for the winding mechanism. It also incorporates a winding mechanism including a winding roller and a drive motor. The winding roller is rotatably mounted in the mounting holes of the side plate via bearings, ensuring smooth operation during the winding process. Furthermore, it utilizes a sliding pressure plate slidably connected to the side plate. Under gravity, the pressure roller of this sliding pressure plate presses against the outer surface of the film already wound on the winding roller, applying continuous pressure to the film roll. Overall, this invention achieves continuous pressure on the film roll through a gravity-adaptive mechanical structure, simplifying the equipment structure and control system while helping to flatten the film and prevent wrinkles.
[0038] This invention employs a left first slider and a left second slider with parallel sliding directions, and a right first slider and a right second slider with parallel sliding directions; it also employs multiple sets of sliding pairs formed by these sliders and corresponding sliding grooves. Overall, this invention, through the synergistic constraint of these sliding pairs, ensures that the sliding pressure plate only has the degree of freedom of movement along the direction of gravity, which helps prevent the sliding pressure plate from deflecting or jamming during movement and ensures the accuracy of its vertical movement.
[0039] This invention employs a displacement sensor mounted on the side plate with its detection surface facing the sliding pressure plate. This sensor can monitor the vertical displacement of the sliding pressure plate in real time. It also employs a controller electrically connected to the displacement sensor and the drive motor. This controller can adjust the speed of the drive motor based on the displacement data measured by the displacement sensor. Overall, this invention can indirectly obtain changes in the film roll diameter by monitoring the position of the sliding pressure plate and adjust the winding speed accordingly. This helps maintain the winding linear speed of the outermost layer of the film within a certain range, reducing film tension fluctuations caused by changes in linear speed. Attached Figure Description
[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0041] Figure 1 A schematic diagram of the overall structure of the membrane surface smoothing and tension buffering mechanism (the diagram shows the actual working state of the membrane roll on the winding roller).
[0042] Figure 2 Perspective view of the overall structure of the membrane surface smoothing and tension buffering mechanism (the membrane roll has been removed to clearly show the structural relationship between the components).
[0043] Figure 3A top view of the overall structure of the membrane surface smoothing and tension buffering mechanism (the membrane roll has been removed to clearly show the structural relationship between the components).
[0044] Figure 4 This is a schematic diagram of the frame structure;
[0045] Figure 5 This is a schematic diagram of the sliding pressure plate structure.
[0046] Figure label:
[0047] 1-Frame; 11-Base plate; 12-Left side plate; 121-Left mounting hole; 122-Left first sliding groove; 123-Left second sliding groove; 13-Right side plate; 131-Right mounting hole; 132-Right first sliding groove; 133-Right second sliding groove;
[0048] 2-Rewinding mechanism; 21-Rewinding roller; 22-Drive motor; 23-Displacement sensor;
[0049] 3-Sliding pressure plate; 311-Left first slider; 312-Left second slider; 321-Right first slider; 322-Right second slider;
[0050] 4-Membrane roll. Detailed Implementation
[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0052] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0054] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this utility model and do not specifically refer to any part or element in this utility model. They should not be construed as limitations on this utility model.
[0055] In this utility model, terms such as "fixed", "connected", and "linked" should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For relevant scientific researchers or technicians in this field, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation on this utility model.
[0056] The embodiments of this utility model will be described in detail below.
[0057] This utility model embodiment discloses a film surface smoothing and tension buffering mechanism, which mainly includes a frame 1, a winding mechanism 2, and a sliding pressure plate 3.
[0058] Figure 1 A schematic diagram of the overall structure of the membrane surface smoothing and tension buffering mechanism (the diagram shows the actual working state of membrane roll 4 on the winding roller). Figure 2 Perspective view of the overall structure of the membrane surface smoothing and tension buffering mechanism (membrane roll 4 has been removed from the figure to clearly show the structural relationship between the components). Figure 3 Top view of the overall structure of the membrane surface smoothing and tension buffering mechanism (membrane roll 4 has been removed from the figure to clearly show the structural relationship between the components). Figure 4 This is a schematic diagram of the frame structure.
[0059] The frame 1 serves as the basic support structure for the entire mechanism. Its function is to provide a stable installation platform and structural rigidity, ensuring that vibration and deformation during the winding process can be controlled within an acceptable range.
[0060] The frame 1 includes a base plate 11, and a left side plate 12 and a right side plate 13 fixedly installed on both sides of the base plate 11.
[0061] The base plate 11 is a rectangular steel plate with a thickness of 10 mm; in other embodiments, the base plate 11 may also be a circular or polygonal structure, and the thickness may be adjusted in the range of 5 mm to 20 mm.
[0062] A left mounting hole 121 is provided on the left side plate 12; a right mounting hole 131 is provided on the right side plate 13. The function of the left mounting hole 121 and the right mounting hole 131 is to provide precise mounting positioning for the winding mechanism 2.
[0063] The winding mechanism 2 is used to wind the film into a film roll 4. Its function is to realize the continuous winding operation of the film and to ensure the winding quality through stable transmission.
[0064] The winding mechanism 2 includes a winding roller 21 and a drive motor 22.
[0065] The left end of the take-up roller 21 is rotatably mounted in the left mounting hole 121 of the left side plate 12 via a bearing, and the right end is rotatably mounted in the right mounting hole 131 of the right side plate 13 via a bearing.
[0066] In this embodiment, the take-up roller 21 is a smooth steel roller with an outer diameter of 150 mm and a length of 800 mm. In other embodiments, the surface of the take-up roller 21 may also be provided with a rubber layer or a polyurethane coating, the outer diameter may be adjusted in the range of 100 mm to 300 mm, and the length may vary between 500 mm and 1200 mm depending on the width of the film.
[0067] The output shaft of the drive motor 22 is connected to the roller shaft of the take-up roller 21 via a belt drive mechanism. Alternatively, the output shaft of the drive motor 22 can be connected to the roller shaft of the take-up roller 21 via a gear drive mechanism.
[0068] The drive motor 22 can be a three-phase asynchronous motor or a servo motor, with a power range of 1.5kW to 5.5kW. The speed can be adjusted between 0-1500rpm by a frequency converter to adapt to the winding requirements of different film materials.
[0069] Figure 5 This is a schematic diagram of the sliding pressure plate structure.
[0070] The sliding pressure plate 3 is slidably connected to at least one of the left side plate 12 and the right side plate 13. Its function is to apply uniform pressure to the surface of the film roll 4 during the winding process and remove interlayer air.
[0071] The sliding pressure plate 3 is configured such that, under the action of gravity, its pressure roller portion can press against the outer surface of the film roll 4 already wound on the take-up roller 21, in order to flatten and prevent the film from wrinkling.
[0072] In this embodiment, the sliding pressure plate 3 is a rectangular structure made of aluminum alloy and weighs 5 kg. In other embodiments, the sliding pressure plate 3 can also be arc-shaped or other structures adapted to the shape of the film roll 4, and its weight can be adjusted from 3 kg to 10 kg. The material can be steel or engineering plastic. The pressure roller portion of the sliding pressure plate 3 is usually coated with a lubricating material to provide appropriate flexibility and wear resistance during pressure contact.
[0073] In other preferred embodiments, a left first sliding groove 122 is formed on the left side plate 12; the projection of the left first sliding groove 122 in the horizontal plane is located on the side of the take-up roller 21 closer to the film input direction. A right first sliding groove 132 is formed on the right side plate 13; the projection of the right first sliding groove 132 in the horizontal plane is located on the side of the take-up roller 21 closer to the film input direction. Correspondingly, a left first slider 311 is formed on the side of the sliding pressure plate 3 facing the left side plate 12; the left first slider 311 and the left first sliding groove 122 form a sliding pair. A right first slider 321 is formed on the side of the sliding pressure plate 3 facing the right side plate 13; the right first slider 321 and the right first sliding groove 132 form a sliding pair. The left first sliding groove 122 and the right first sliding groove 132 can be rectangular grooves, trapezoidal or dovetail-shaped structures, with depths adjustable from 15mm to 30mm and widths varying from 10mm to 20mm.
[0074] In other preferred embodiments, a left second sliding groove 123 is further formed on the left side plate 12; the projection of the left second sliding groove 123 in the horizontal plane is located on the side of the take-up roller 21 away from the film input direction. A right second sliding groove 133 is further formed on the right side plate 13; the projection of the right second sliding groove 133 in the horizontal plane is located on the side of the take-up roller 21 away from the film input direction. A left second slider 312 is further formed on the side of the sliding pressure plate 3 facing the left side plate 12; the left second slider 312 and the left second sliding groove 123 form a sliding pair. A right second slider 322 is further formed on the side of the sliding pressure plate 3 facing the right side plate 13; the right second slider 322 and the right second sliding groove 133 form a sliding pair. The function of the left second slider 312 and the right second slider 322 is to cooperate with the left first slider 311 and the right first slider 321 to form a multi-sliding pair constraint, preventing the sliding pressure plate 3 from rotating during movement.
[0075] In other preferred embodiments, the sliding direction of the left first slider 311 is parallel to the sliding direction of the left second slider 312; the sliding direction of the right first slider 321 is parallel to the sliding direction of the right second slider 322. Under the constraint of the sliding pairs formed by the left first slider 311 and the left first sliding groove 122, the left second slider 312 and the left second sliding groove 123, the right first slider 321 and the right first sliding groove 132, and the right second slider 322 and the right second sliding groove 133, the sliding pressure plate 3 only has the degree of freedom to move along the direction of gravity, so as to eliminate the shaking caused by unexpected degrees of freedom. Due to the symmetrical arrangement of the sliding pairs, the stress is evenly distributed, thereby reducing the risk of local wear and jamming.
[0076] In other preferred embodiments, the single-sided clearance between the left first slider 311 and the left first sliding groove 122 is no greater than 1 mm; the single-sided clearance between the left second slider 312 and the left second sliding groove 123 is no greater than 1 mm; the single-sided clearance between the right first slider 321 and the right first sliding groove 132 is no greater than 1 mm; and the single-sided clearance between the right second slider 322 and the right second sliding groove 133 is no greater than 1 mm. Preferably, the single-sided clearance of each sliding pair is 0.5 mm. This clearance is achieved through precision machining and assembly adjustment. Its function is to balance the flexibility of movement and the guiding accuracy. If the clearance is too small, it may cause jamming; if the clearance is too large, it may cause the sliding pressure plate 3 to wobble, affecting the pressure contact effect.
[0077] In other preferred embodiments, the winding mechanism 2 further includes a displacement sensor 23 mounted on the left side plate 12 or the right side plate 13, with its detection surface facing the sliding pressure plate 3, for real-time monitoring of the vertical displacement of the sliding pressure plate 3. A controller (not shown) is electrically connected to the displacement sensor 23 and the drive motor 22. The controller is configured to adjust the rotational speed of the drive motor 22 in response to the displacement data of the sliding pressure plate 3 measured by the displacement sensor 23, so that the winding linear speed of the outermost layer of the film roll 4 on the winding roller 21 is maintained within a predetermined range. The displacement sensor 23 is a laser rangefinder; in other embodiments, the displacement sensor 23 may also be an ultrasonic sensor or a photoelectric sensor. The controller may be a PLC or an embedded system, adjusting the rotational speed of the drive motor 22 through a PID algorithm. This configuration helps reduce tension fluctuations caused by changes in the diameter of the film roll 4, thereby reducing the probability of film wrinkles.
[0078] Specifically, the present invention, through the sliding pair structure formed by the left first slider 311 and the left first sliding groove 122, the left second slider 312 and the left second sliding groove 123, the right first slider 321 and the right first sliding groove 132, and the right second slider 322 and the right second sliding groove 133, in conjunction with the coordinated work of the displacement sensor 23 and the controller, can produce good technical effects in improving the flatness of film winding and reducing tension fluctuations.
[0079] Overall, this utility model combines a frame 1, a winding mechanism 2, and a sliding pressure plate 3, which can simplify the equipment structure to a certain extent. It can achieve continuous pressure on the film roll 4 through a gravity-adaptive mechanical structure, which has a positive effect on improving the winding quality.
[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A membrane surface smoothing and tension buffering mechanism, characterized in that, include: The frame (1) includes a base plate (11) and a left side plate (12) and a right side plate (13) fixedly installed on both sides of the base plate (11); the left side plate (12) has a left mounting hole (121); the right side plate (13) has a right mounting hole (131). A winding mechanism (2) is used to wind the film into a roll; the winding mechanism (2) includes a winding roller (21) and a drive motor (22); the left end of the roller shaft of the winding roller (21) is rotatably mounted in the left mounting hole (121) of the left side plate (12) through a bearing, and the right end is rotatably mounted in the right mounting hole (131) of the right side plate (13) through a bearing; the output shaft of the drive motor (22) is connected to the roller shaft of the winding roller (21) in a transmission connection; A sliding pressure plate (3) is slidably connected to at least one of the left side plate (12) and the right side plate (13); in, The sliding pressure plate (3) is configured such that, under the action of gravity, its pressure roller portion can press against the outer surface of the film already wound on the take-up roller (21) to flatten and prevent the film from wrinkling.
2. The membrane surface smoothing and tension buffering mechanism according to claim 1, characterized in that: A left first sliding groove (122) is formed on the left side plate (12); the projection of the left first sliding groove (122) in the horizontal plane is located on the side of the roller shaft of the take-up roller (21) closer to the film input direction; A right first sliding groove (132) is formed on the right side plate (13); the projection of the right first sliding groove (132) in the horizontal plane is located on the side of the take-up roller (21) closer to the film input direction. The sliding pressure plate (3) has a left first slider (311) on the side facing the left side plate (12); the left first slider (311) and the left first sliding groove (122) form a sliding pair; The sliding pressure plate (3) has a right first slider (321) formed on the side facing the right side plate (13); the right first slider (321) and the right first sliding groove (132) form a sliding pair.
3. The membrane surface smoothing and tension buffering mechanism according to claim 2, characterized in that: A second left sliding groove (123) is further formed on the left side plate (12); the projection of the second left sliding groove (123) in the horizontal plane is located on the side of the take-up roller (21) away from the film input direction; A second right sliding groove (133) is further formed on the right side plate (13); the projection of the second right sliding groove (133) in the horizontal plane is located on the side of the take-up roller (21) away from the film input direction. The sliding pressure plate (3) has a left second slider (312) further formed on the side facing the left side plate (12); the left second slider (312) and the left second sliding groove (123) form a sliding pair; The sliding pressure plate (3) has a right second slider (322) further formed on the side facing the right side plate (13); the right second slider (322) and the right second sliding groove (133) form a sliding pair.
4. The membrane surface smoothing and tension buffering mechanism according to claim 3, characterized in that: The sliding direction of the left first slider (311) is parallel to the sliding direction of the left second slider (312); The sliding direction of the right first slider (321) is parallel to the sliding direction of the right second slider (322); in, Under the constraint of the sliding pair formed by the left first slider (311) and the left first sliding groove (122), the left second slider (312) and the left second sliding groove (123), the right first slider (321) and the right first sliding groove (132), and the right second slider (322) and the right second sliding groove (133), the sliding pressure plate (3) only has the degree of freedom to move along the direction of gravity.
5. The membrane surface smoothing and tension buffering mechanism according to claim 3, characterized in that: The single-sided clearance between the left first slider (311) and the left first sliding groove (122) is no greater than 1mm; The single-sided clearance between the left second slider (312) and the left second sliding groove (123) is no greater than 1mm; The clearance between the right first slider (321) and the right first sliding groove (132) on one side is no greater than 1mm; The single-sided gap between the right second slider (322) and the right second sliding groove (133) is no greater than 1mm.
6. The membrane surface smoothing and tension buffering mechanism according to claim 1, characterized in that, The winding mechanism (2) further includes: A displacement sensor (23) is installed on the left side plate (12) or the right side plate (13) with its detection surface facing the sliding pressure plate (3) for real-time monitoring of the vertical displacement of the sliding pressure plate (3); The controller is electrically connected to the displacement sensor (23) and the drive motor (22); The controller is configured as follows: In response to the displacement data of the sliding pressure plate (3) measured by the displacement sensor (23), the rotation speed of the drive motor (22) is adjusted so that the winding speed of the outermost layer of the film on the take-up roller (21) is maintained within a predetermined range.
7. The membrane surface smoothing and tension buffering mechanism according to claim 1, characterized in that, The output shaft of the drive motor (22) is connected to the roller shaft of the take-up roller (21) via a belt drive mechanism.
8. The membrane surface smoothing and tension buffering mechanism according to claim 1, characterized in that, The output shaft of the drive motor (22) is connected to the roller shaft of the take-up roller (21) through a gear transmission mechanism.