Coating equipment and coating method

Abstract

The invention relates to coating equipment and a coating method, and belongs to the technical field of coating. The coating equipment comprises a coating mechanism, a conveying mechanism and a wetting mechanism, the coating mechanism comprises a coating roller and a coating head, the coating roller is used for bearing and conveying a membrane material, and the coating head is matched with the coating roller to coat slurry on the surface, away from the coating roller, of the membrane material; the conveying mechanism is used for conveying a membrane material to the coating roller; the wetting mechanism is arranged on the upstream, corresponding to the coating roller, of the conveying mechanism, and is used for uniformly spraying a liquid medium to the surface, close to the coating roller, of the membrane material, so that the membrane material is attached to the coating roller. According to the coating equipment and the coating method provided by the invention, the problem of black spots or non-uniform thickness of the coated membrane material due to the existence of concave and convex points on the surface of the membrane material in related technologies is at least solved.

Description

Technical Field

[0001] This application relates to the field of coating technology, and in particular to a coating device and a coating method. Background Technology

[0002] Coating technology has a wide range of applications and is widely used in manufacturing industries such as electronic circuits, medical products, photoresist materials, semiconductor etching, new energy batteries, solar photovoltaics, and LCD module displays.

[0003] In the coating process of related technologies, due to the inconsistent quality of the incoming film materials to be coated, some film materials may have small bumps on their surface. During the conveying process of the film material, it is easy for it to not adhere to the roller. As a result, when the adhesive is applied to the film material in the subsequent coating process, it is easy to cause uneven distribution of the adhesive, and after the adhesive is cured and heated, black spots may form or even the thickness of the film material may be significantly uneven.

[0004] Therefore, there is an urgent need to propose a new coating equipment and coating method to solve the above problems. Summary of the Invention

[0005] Therefore, it is necessary to provide a coating equipment and coating method to address the problem of black spots or uneven thickness of the coated membrane material caused by unevenness on the surface of the membrane material.

[0006] This application provides a coating apparatus, which includes a coating mechanism, a conveying mechanism, and a wetting mechanism. The coating mechanism includes a coating roller and a coating head. The coating roller is used to carry and convey the film material. The coating head cooperates with the coating roller to coat the film material on the surface away from the coating roller. The conveying mechanism is used to convey the film material to the coating roller. The wetting mechanism is located upstream of the conveying mechanism corresponding to the coating roller. The wetting mechanism is used to uniformly spray a liquid medium onto the surface of the film material near the coating roller to make the film material adhere to the coating roller.

[0007] In some embodiments, the humidification mechanism includes a storage tank and a flexible spray pipe. The storage tank is used to store liquid media, and one end of the flexible spray pipe is connected to the storage tank, while the other end is located near the conveying mechanism.

[0008] In some embodiments, the wetting mechanism further includes a moving device connected to the end of the flexible spray pipe away from the storage tank, and capable of driving the flexible spray pipe to reciprocate along a first direction, which intersects with the conveying direction of the membrane material.

[0009] In some embodiments, the moving device is a rodless cylinder.

[0010] In some embodiments, the liquid medium is alcohol.

[0011] In some embodiments, the coating mechanism further includes a leveling member disposed between the wetting mechanism and the coating head; a gap exists between the leveling member and the coating roller, the gap being configured to allow the film material to pass through, so as to use the leveling member to adhere the surface of the film material sprayed with the liquid medium to the coating roller.

[0012] In some embodiments, the conveying mechanism includes a plurality of conveying rollers, and the film material is disposed on the coating roller after passing through the plurality of conveying rollers in sequence; in the position where the wetting mechanism is set, the end of the film material in contact with the conveying roller is higher than the end in contact with the coating roller.

[0013] This application also provides a coating method, which includes a coating apparatus as provided in any of the foregoing embodiments, the coating apparatus comprising the following steps:

[0014] Step S1: Control the conveying mechanism to convey the film material to the coating mechanism;

[0015] Step S2: Control the wetting mechanism to uniformly spray liquid medium onto the surface of the film material in contact with the coating roller, so that the film material adheres to the coating roller.

[0016] In some embodiments, after the wetting mechanism sprays the liquid medium onto the film material, it controls the leveling member to move toward the coating roller and causes the film material to pass between the leveling member and the coating roller.

[0017] In some embodiments, the liquid medium is alcohol, and the humidification mechanism dynamically adjusts the amount of alcohol sprayed, Q. spray And satisfy the following formula:

[0018]

[0019] Where, k evap denoted as the alcohol evaporation rate coefficient, w as the film width, L as the distance from the alcohol spray point to the coating roller, and v as the film linear velocity.

[0020] The coating equipment and coating method provided in the embodiments of this application have at least the following beneficial effects:

[0021] By setting a wetting mechanism upstream of the coating roller in the conveying mechanism, and using the wetting mechanism to uniformly spray liquid medium onto the surface of the film material near the coating roller, the film material can fit more closely and smoothly after contacting the coating roller. This improves the situation of small bumps on the surface of the film material, reduces the impact of inconsistent film material quality on the coating quality, and enhances the reliability of the coating equipment.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] 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 or the prior art 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.

[0024] Figure 1 This is a schematic diagram of the planar structure of a coating apparatus provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 Enlarged view of part A;

[0026] Figure 3 This is a flowchart of a coating method provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 100, coating equipment; 10, coating mechanism; 11, coating roller; 12, coating head; 20, conveying mechanism; 21, conveying roller; 30, wetting mechanism; 31, storage tank; 32, flexible spraying pipe; 33, moving device; 40, flattening component; 200, film material. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the term "and / or" appears, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] Please refer to Figure 1 and Figure 2This application provides a coating apparatus 100, which includes a coating mechanism 10, a conveying mechanism 20, and a wetting mechanism 30. The coating mechanism 10 includes a coating roller 11 and a coating head 12. The coating roller 11 is used to carry and convey a film material 200. The coating head 12 cooperates with the coating roller 11 to coat the film material 200 on the surface away from the coating roller 11. The conveying mechanism 20 is used to convey the film material 200 to the coating roller 11. The wetting mechanism 30 is located upstream of the conveying mechanism 20, corresponding to the coating roller 11. The wetting mechanism 30 is used to uniformly spray a liquid medium onto the surface of the film material 200 near the coating roller 11 so that the film material 200 adheres to the coating roller 11.

[0035] The coating mechanism 10 is a key mechanism in the coating equipment 100, used to uniformly coat the slurry onto the film material 200. The slurry can be selected according to the technical field in which the coating equipment 100 is applied. For example, in the field of new energy batteries, the film material 200 can be a foil in an electrode assembly, and the slurry can be the active material in the positive and negative electrode materials of the battery. The coating equipment 100 coats the slurry onto the foil to form the positive and negative electrode sheets of the battery. In the field of electronic circuit technology, the film material 200 can be a substrate in a printed circuit board, and the slurry can be a photosensitive ink, liquid photoresist, or solder resist. In the field of flexible electronics and packaging substrate technology, the film material 200 can be a flexible circuit board or a semiconductor packaging substrate, and the slurry can be a conductive adhesive, an insulating adhesive, or a UV-curable protective adhesive.

[0036] The coating mechanism 10 includes a coating roller 11 and a coating head 12. The coating roller 11 is used to carry and transport the film material 200. The coating head 12 cooperates with the coating roller 11 to coat the slurry onto the surface of the film material 200 away from the coating roller 11. In other words, the coating roller 11 is the component in the coating mechanism 10 that performs the function of carrying and transporting, and the coating head 12 is the component in the coating mechanism 10 that outputs the slurry. It is used to uniformly coat the slurry onto the surface of the film material 200 away from the coating roller 11 while the coating roller 11 continuously transports the film material 200.

[0037] The conveying mechanism 20 is used to convey the film material 200 to the coating roller 11. This means that the conveying mechanism 20 is used to draw the film material 200 out from the unwinding mechanism (not shown) and guide the film material 200 to contact the coating roller 11, so that the film material 200 can continuously undergo the coating process as it follows the rotation of the coating roller 11.

[0038] The wetting mechanism 30 is located upstream of the coating roller 11 in the conveying mechanism 20. This means that the output end of the wetting mechanism 30 is positioned upstream of the coating roller 11 in the conveying mechanism 20. Before the film material 200 is continuously conveyed to the coating roller 11 by the conveying mechanism 20 for the coating process, the wetting mechanism 30 can spray a liquid medium onto the film material 200. This improves the adhesion and flatness between the film material 200 and the coating roller 11, reduces the impact of minor bumps on the film material 200 on subsequent coating processes, and thus improves the reliability of the coating equipment 100. The liquid medium can be, but is not limited to, pure water or alcohol.

[0039] According to the coating equipment 100 provided in the embodiments of this application, by setting a wetting mechanism 30 at the upstream position of the conveying mechanism 20 corresponding to the coating roller 11, and using the wetting mechanism 30 to uniformly spray liquid medium onto the surface of the film material 200 near the coating roller 11, the film material 200 can fit more closely and flatten after contacting the coating roller 11, improving the situation of small bumps on the surface of the film material 200, reducing the impact of inconsistent quality of the film material 200 on the coating quality, and improving the reliability of the coating equipment 100.

[0040] In some embodiments, the humidification mechanism 30 includes a storage tank 31 and a flexible spray pipe 32. The storage tank 31 is used to store liquid media, and one end of the flexible spray pipe 32 is connected to the storage tank 31, while the other end is located near the conveying mechanism 20.

[0041] The storage tank 31 is used to store the liquid medium, providing stable and sealed storage conditions for it. In these embodiments of the present application, the height of the storage tank 31 can be set to be greater than the height of the conveying mechanism 20 and the coating mechanism 10, so that the liquid medium in the storage tank 31 has a certain potential energy relative to the conveying mechanism 20 or the coating mechanism 10. Therefore, when spraying the liquid medium, no external power is required, and the liquid medium can be sprayed onto the membrane material 200 by converting potential energy into kinetic energy.

[0042] One end of the flexible spray pipe 32 is connected to the storage tank 31, and the other end is located near the conveying mechanism 20. This means that the flexible spray pipe 32 is used to draw out the liquid medium in the storage tank 31 and spray it onto the membrane material 200.

[0043] In these embodiments of this application, the flexible spray pipe 32 can be made of rubber or flexible plastic to make it more flexible and deformable according to the spraying direction, thereby increasing the spraying range of the liquid medium in the flexible spray pipe 32.

[0044] It is understood that at least one valve is provided on the flexible spraying pipe 32. The valve can be located at the end of the flexible spraying pipe 32 near the storage tank 31, or in the middle of the flexible spraying pipe 32, or at the end of the flexible spraying pipe 32 away from the storage tank 31. The spraying state and spraying rate of the liquid medium can be adjusted by adjusting the opening and closing size of the valve.

[0045] In some embodiments, the wetting mechanism 30 further includes a moving device 33, which is connected to the end of the flexible spray pipe 32 away from the storage tank 31 and can drive the flexible spray pipe 32 to move back and forth along a first direction, which intersects with the conveying direction of the membrane material 200.

[0046] The connection between the moving device 33 and the end of the flexible spray pipe 32 away from the storage tank 31 means that the moving device 33 can drive the output end of the flexible spray pipe 32 to move back and forth in the first direction so that the liquid medium can be sprayed evenly in the first direction.

[0047] The first direction intersects with the conveying direction of the membrane material 200, meaning that the moving device 33 drives the flexible spraying pipe 32 to move back and forth in the first direction so that the liquid medium can be sprayed evenly in the width direction of the membrane material 200, so that the liquid medium covers more areas of the membrane material 200.

[0048] In these embodiments of this application, the connection between the flexible spray pipe 32 and the mobile device 33 may be implemented by means of bonding, embedding, or other methods to improve the stability of the connection between the flexible spray pipe 32 and the mobile device 33 and reduce the risk of the flexible spray pipe 32 falling off. In some embodiments, the flexible spray pipe 32 and the mobile device 33 may also be detachably connected by means of rope binding, snap-fit, or other methods to facilitate subsequent maintenance and replacement of the flexible spray pipe 32 or the mobile device 33.

[0049] For example, in some embodiments, the moving device 33 can be configured as an electric cylinder, and the flexible spraying pipe 32 can be driven to reciprocate in the first direction by connecting the flexible spraying pipe 32 to the output shaft of the electric cylinder; or, the moving device 33 can be configured to use a motor and a lead screw structure, in which the motor drives the lead screw to rotate, and then the slider connected to the lead screw is connected to the flexible spraying pipe 32, thereby realizing that the lead screw drives the slider to reciprocate in the first direction, and the slider drives the flexible spraying pipe 32 to reciprocate in the first direction.

[0050] In some embodiments, the moving device 33 can be configured as a rodless cylinder. This utilizes the advantage of the short stroke of the rodless cylinder to save space in the processing area and facilitates the miniaturization of the coating equipment 100.

[0051] In some embodiments, the liquid medium can be alcohol. This can further improve the coating quality of the coating equipment 100 because alcohol has strong volatility. After being sprayed onto the membrane material 200, the alcohol can evaporate quickly within a certain period of time without leaving any marks or defects on the membrane material 200. Compared with the defect of leaving water stains when spraying water onto the membrane material 200, alcohol can reduce the impact of the liquid medium itself on the membrane material 200, thereby further improving the reliability of the coating equipment 100.

[0052] In some embodiments, the coating mechanism 10 further includes a flattening member 40 disposed between the wetting mechanism 30 and the coating head 12; there is a gap between the flattening member 40 and the coating roller 11, the gap being configured to allow the film material 200 to pass through, so as to use the flattening member 40 to adhere the surface of the film material 200 sprayed with liquid medium to the coating roller 11.

[0053] The flattening component 40 is used to cooperate with the coating roller 11 after the surface of the film material 200 near the coating roller 11 is wetted, so as to further press and adhere the film material 200 and the coating roller 11, reduce the influence of the tiny bumps on the film material 200 on the subsequent slurry coating, and make the surface of the product after slurry coating smoother and the thickness more uniform.

[0054] In these embodiments of this application, the flattening element 40 can be configured as a pressure roller with its axis parallel to the axis of the coating roller 11. By allowing the film material 200 to pass through the gap between the pressure roller and the coating roller 11, the film material 200 is pressed to fit more closely with the coating roller 11. In some embodiments, the flattening element 40 can also be configured as a scraper. When the coating roller 11 drives the film material 200 past the position set by the flattening element 40, the flattening element 40 (scraper) presses the film material 200 against the coating roller 11, thereby further improving the bonding effect between the film material 200 and the coating roller 11.

[0055] In some embodiments, the conveying mechanism 20 includes a plurality of conveying rollers 21, and the film material 200 is disposed on the coating roller 11 after passing through the plurality of conveying rollers 21 in sequence; at the position where the wetting mechanism 30 is disposed, the end of the film material 200 in contact with the conveying rollers 21 is higher than the end in contact with the coating roller 11.

[0056] The function of the multiple conveying rollers 21 is to cooperate with each other to convey the film material 200 from the unwinding mechanism to the coating roller 11. It can be understood that the axes of the multiple conveying rollers 21 can be set to be parallel to each other. By designing the position of the multiple conveying rollers 21, the setting of the conveying mechanism 20 can be adapted to the spatial conditions of the processing plant.

[0057] At the location where the wetting mechanism 30 is set, the end of the film material 200 that contacts the conveying roller 21 is higher than the end that contacts the coating roller 11. That is, when the film material 200 enters the coating roller 11 (before coating), it is located at the last stage of the coating process in the conveying mechanism 20 (i.e., the location where the wetting mechanism 30 is set). By designing the positions of the conveying roller 21 and the coating roller 11, the end of the film material 200 that contacts the conveying roller 21 can be higher than the end that contacts the coating roller 11.

[0058] This reduces the waste of liquid medium sprayed from the humidification mechanism 30 onto the membrane material 200, lowers the risk of the liquid medium detaching from the membrane material 200 due to gravity or inertia, and improves the utilization rate of the sprayed liquid medium, resulting in better economy and reliability.

[0059] Please refer to Figures 1 to 3 This application also provides a coating method, which includes a coating apparatus 100 as provided in any of the foregoing embodiments. The coating apparatus 100 includes the following steps:

[0060] Step S1: Control the conveying mechanism 20 to convey the film material 200 to the coating mechanism 10.

[0061] In this step, the user can pull the film material 200 out of the unwinding mechanism (not shown) and then pass the end of the film material 200 away from the unwinding mechanism through the multiple conveying rollers 21 of the conveying mechanism 20 and connect it to the coating roller 11, so that the coating roller 11 can drive the film material 200 to advance continuously during its own rotation, thereby coating the film material 200.

[0062] Step S2: Control the wetting mechanism 30 to uniformly spray liquid medium onto the surface of the film material 200 that contacts the coating roller 11, so that the film material 200 and the coating roller 11 are in contact.

[0063] The timing for controlling the operation of the wetting mechanism 30 can be after the conveying mechanism 20 and the coating roller 11 have stabilized. Simultaneously, after the wetting mechanism 30 is operating, the operator can adjust the amount of liquid medium sprayed by the wetting mechanism 30 as needed to increase the wetting rate of the film material 200 by the liquid medium. This ensures that the film material 200 adheres more closely to the coating roller 11 while preventing slippage between the film material 200 and the coating roller 11 due to excessive liquid medium.

[0064] In these embodiments of this application, by setting a wetting mechanism 30 at the upstream position of the conveying mechanism 20 corresponding to the coating roller 11, and by using the wetting mechanism 30 to uniformly spray liquid medium onto the surface of the film material 200 near the coating roller 11, the film material 200 can fit more closely and be flatter after contacting the coating roller 11, improving the situation of small bumps on the surface of the film material 200, reducing the impact of inconsistent quality of the film material 200 on the coating quality, and improving the reliability of the coating equipment 100.

[0065] In some embodiments, after the wetting mechanism 30 sprays the liquid medium onto the film material 200, it controls the leveling member 40 to move toward the coating roller 11 and causes the film material 200 to pass between the leveling member 40 and the coating roller 11.

[0066] In these embodiments of this application, the flattening member 40 can press the film material 200 and the coating roller 11 together before coating the film material 200, thereby improving the flatness of the film material 200 during coating and reducing the occurrence of defective products after coating due to the presence of tiny bumps in the film material 200 itself.

[0067] In these embodiments of the present application, the flattening element 40 may be a pressure roller or a scraper.

[0068] In some embodiments, the liquid medium is alcohol, and the wetting mechanism 30 dynamically adjusts the amount of alcohol sprayed Q. spray And satisfy the following formula:

[0069]

[0070] Where, k evap denoted as the alcohol evaporation rate coefficient, w as the film width, L as the distance from the alcohol spray point to the coating roller, and v as the film linear velocity.

[0071] In these embodiments of this application, by dynamically adjusting the amount of liquid medium sprayed by the wetting mechanism 30 using the above formula, the amount of liquid medium sprayed can be precisely controlled, so that the liquid medium can improve the adhesion between the film material 200 and the coating roller 11 while reducing the impact of the liquid medium on the coated product.

[0072] Among them, K evap This value is affected by factors such as ambient temperature, airflow velocity, and membrane surface characteristics; therefore, it can usually be set by the user before use. K evap The value ranges from 0.5 mL / (m²·min) to 5.0 mL / (m²·min).

[0073] In this way, since the width w of the film material 200 and the distance L between the alcohol spray point and the coating roller 11 are constant, the amount of alcohol sprayed Q is controlled.spray The speed can be set proportionally to the linear velocity of the film 200 so that after the alcohol is sprayed, the adhesion between the film 200 and the coating roller 11 can be improved. At the same time, after the film 200 is coated, the alcohol sprayed on the film 200 (away from the slurry coating surface) can be basically evaporated, thereby reducing the impact of alcohol on subsequent product processing and further improving the reliability of the coating equipment 100.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coating device, characterized in that, include: A coating mechanism includes a coating roller and a coating head. The coating roller is used to carry and transport the film material, and the coating head cooperates with the coating roller to coat the slurry onto the surface of the film material away from the coating roller. A conveying mechanism is used to convey the film material to the coating roller; A wetting mechanism is disposed upstream of the conveying mechanism corresponding to the coating roller. The wetting mechanism is used to uniformly spray a liquid medium onto the surface of the film material near the coating roller so that the film material adheres to the coating roller.

2. The coating equipment according to claim 1, characterized in that, The humidification mechanism includes a storage tank and a flexible spray pipe. The storage tank is used to store the liquid medium. One end of the flexible spray pipe is connected to the storage tank, and the other end is located near the conveying mechanism.

3. The coating equipment according to claim 2, characterized in that, The humidification mechanism also includes a moving device, which is connected to the end of the flexible spray pipe away from the storage tank and can drive the flexible spray pipe to reciprocate along a first direction, which intersects with the conveying direction of the membrane material.

4. The coating equipment according to claim 3, characterized in that, The moving device is a rodless cylinder.

5. The coating equipment according to claim 1, characterized in that, The liquid medium is alcohol.

6. The coating equipment according to claim 1, characterized in that, The coating mechanism further includes a leveling component, which is disposed between the wetting mechanism and the coating head; There is a gap between the flattening element and the coating roller, the gap being configured to allow the film material to pass through, so that the surface of the film material sprayed with the liquid medium is adhered to the coating roller by the flattening element.

7. The coating apparatus according to any one of claims 1 to 6, characterized in that, The conveying mechanism includes multiple conveying rollers, and the film material is disposed on the coating roller after passing through the multiple conveying rollers in sequence. At the location where the wetting mechanism is set, the end of the film material that contacts the conveying roller is higher than the end that contacts the coating roller.

8. A coating method, comprising a coating apparatus as described in any one of claims 1 to 7, characterized in that, Includes the following steps: The control conveying mechanism transports the film material to the coating mechanism; The humidification mechanism sprays a liquid medium evenly onto the surface of the film material that contacts the coating roller, so that the film material adheres to the coating roller.

9. The coating method according to claim 8, characterized in that, After the wetting mechanism sprays the liquid medium onto the film material, it controls the leveling component to move closer to the coating roller, and causes the film material to pass between the leveling component and the coating roller.

10. The coating method according to claim 8, characterized in that, The liquid medium is alcohol, and the humidification mechanism dynamically adjusts the amount of alcohol sprayed, Q. spray And satisfy the following formula: Where, k evap denoted as the alcohol evaporation rate coefficient, w as the film width, L as the distance from the alcohol spray point to the coating roller, and v as the film linear velocity.

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