Membrane coating device

Abstract

The utility model relates to diaphragm preparation technical field especially relates to a kind of diaphragm coating device, it includes first cover plate;Second cover plate, second cover plate is rotatably connected with first cover plate, and hollow area is opened in second cover plate;Roller body is provided in hollow area, and two groups of installation shell are rotatably connected to the both sides end portion of roller body;Two groups of driving mechanisms are set one by one with two groups of installation shell, and driving mechanism is set on second cover plate, and driving mechanism is drivingly connected with installation shell, and driving mechanism can drive installation shell to drive roller body to move in hollow area, to carry out coating to diaphragm;Two groups of adjusting mechanisms are set one by one with two groups of installation shell, and adjusting mechanism is set between roller body and installation shell, and adjusting mechanism is used to adjust the coating thickness of roller body.The utility model can reduce the complexity of operation, improve the consistency of diaphragm coating film formation.

Description

Technical Field

[0001] This utility model relates to the field of membrane preparation technology, and in particular to a membrane coating device. Background Technology

[0002] Currently, the coating operation of membranes in laboratory-scale preparation typically uses a relatively simple semi-perforated fixture. This simple fixture mainly consists of the following parts: a perforated second cover plate, a first cover plate, clamps corresponding to the first cover plate, and a handheld roller. The operation method is generally as follows: the membrane to be coated is tightly adhered to the first cover plate, the second cover plate is placed on the membrane and clamped with the matching clamps, then an appropriate amount of coating liquid is poured onto it, and finally, the excess coating liquid is poured off using a handheld roller, an air knife, or simply by pouring it off.

[0003] The above methods involve long operation times, especially when multiple coating solutions are required for multiple coatings. Each time a coating solution is poured, it requires covering with a cover plate and clamping with clips. These manual operations make it difficult to ensure the consistency of the films in batch experiments. For example, with manual roller extrusion, it is difficult to control the extrusion force and speed, making it difficult to ensure the consistency of the reaction. For volatile pre-wetting solutions, it is difficult to ensure that the time taken for each operation is consistent, which can easily affect the film-forming properties of subsequent reactions.

[0004] Therefore, a film coating device is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a film coating device that can reduce the complexity of operation and improve the consistency of film coating.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A film coating apparatus, comprising:

[0008] First cover plate;

[0009] The second cover plate is rotatably connected to the first cover plate, and the second cover plate has a hollow area.

[0010] A roller body is provided in the hollow area, and two sets of mounting housings are rotatably connected to the two ends of the roller body;

[0011] Two sets of drive mechanisms are provided, corresponding one-to-one with the two sets of mounting housings. The drive mechanisms are mounted on the second cover plate and are connected to the mounting housings in a transmission manner. The drive mechanisms can drive the mounting housings to move the rollers in the hollowed-out area to coat the film.

[0012] Two sets of adjustment mechanisms are provided, corresponding one-to-one with the two sets of mounting housings. The adjustment mechanisms are located between the roller body and the mounting housings, and are used to adjust the coating thickness of the roller body.

[0013] In some embodiments, the driving mechanism includes a driving member and a transmission assembly, both of which are disposed on the second cover plate. The driving member is driven to the transmission assembly, and the mounting housing is driven to the transmission assembly.

[0014] In some embodiments, the transmission assembly includes a lead screw, a slide rail, and a slide table. The lead screw and the slide rail are both disposed on the second cover plate. The lead screw and the slide rail are arranged parallel to each other and spaced apart. The lead screw is connected to the driving member for transmission. The slide table is slidably disposed on the slide rail and is screwed to the lead screw. The mounting housing is connected to the slide table.

[0015] In some embodiments, the adjustment mechanism includes an adjustment drive assembly, a floating support assembly, and a bearing assembly. The floating support assembly is disposed in the mounting housing, the bearing assembly is disposed in the floating support assembly, the roller shaft of the roller body is fixedly inserted in the bearing assembly, the adjustment drive assembly is connected to the inner wall of the mounting housing, and the adjustment drive assembly is pulsatorically connected to the bearing assembly. The adjustment drive assembly can adjust the coating thickness of the roller body by adjusting the position of the bearing assembly in the mounting housing.

[0016] In some embodiments, the bearing assembly includes an angular contact bearing, a crossed roller bearing, and a bearing housing. The bearing housing is disposed in the mounting housing. The outer ring of the angular contact bearing is fixedly disposed in the bearing housing. The angular contact bearing is fixedly sleeved on the crossed roller bearing. The crossed roller bearing is fixedly sleeved on the roller shaft. The bearing housing cooperates with the floating support assembly and the adjustment drive assembly.

[0017] In some embodiments, the adjustment drive assembly includes a cylinder, a first connecting rod, a second connecting rod, and an eccentric wheel. The cylinder is connected to the inner wall of the mounting housing. One end of the first connecting rod is rotatably connected to the piston rod of the cylinder, and the other end of the first connecting rod is rotatably connected to the eccentricity axis of the eccentric wheel. One end of the second connecting rod is rotatably connected to the rotation center axis of the eccentric wheel, and the other end of the second connecting rod is rotatably connected to the mounting housing. The eccentric wheel abuts against the bearing seat, and the cylinder can drive the eccentric wheel to rotate via the first connecting rod.

[0018] In some embodiments, the floating support assembly includes a first elastic element, a second elastic element, and a third elastic element, the first elastic element, the second elastic element, and the third elastic element being spaced apart between the inner sidewall of the mounting housing and the bearing seat, the first elastic element and the second elastic element being disposed opposite to each other, and the third elastic element being disposed opposite to the adjustment drive assembly.

[0019] In some embodiments, a buffer pad is also included, which is disposed at one end of the second cover plate away from the drive member, and the buffer pad is capable of cushioning the slide.

[0020] In some embodiments, the second cover plate has a plurality of drainage holes, all of which are connected to the hollow area.

[0021] In some embodiments, a hinge is provided between the second cover plate and the first cover plate, and the hinge is connected to the second cover plate and the first cover plate respectively.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides a film coating device in which a second cover plate is rotatably connected to a first cover plate. The second cover plate has a hollowed-out area, and a mounting housing is located within this hollowed-out area and is connected to a drive mechanism arranged on the second cover plate. The end of a roller is rotatably mounted within the mounting housing. The drive mechanism can move the roller by driving the mounting housing. The adjustment mechanism, by using the drive mechanism to drive the roller for liquid removal, avoids the need to remove the first and second cover plates each time in traditional film preparation molds, saving operation time. It also prevents the film from failing to wet due to the evaporation of moisture and reaction liquid caused by prolonged operation, thus avoiding impact on the reaction effect. Furthermore, the adjustment mechanism, located between the roller and the mounting housing, can effectively adjust the coating thickness of the roller. Through these methods, the complexity of operation is reduced, and the consistency of film coating is improved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a film coating device according to the present invention;

[0026] Figure 2This is an internal top view of the second cover plate in a film coating device of this utility model;

[0027] Figure 3 This is a side view of the cooperation between the roller body and bearing assembly of a film coating device according to this utility model;

[0028] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0029] In the picture:

[0030] 100. Mold; 1. First cover plate; 2. Second cover plate; 21. Buffer pad; 22. Hollowed-out area; 3. Roller body; 4. Drive mechanism; 41. Drive component; 42. Slide table; 43. Lead screw; 44. Slide rail; 5. Mounting housing; 6. Adjustment mechanism; 61. Bearing assembly; 611. Angular contact bearing; 612. Cross roller bearing; 62. Adjustment drive assembly; 621. Cylinder; 622. First connecting rod; 623. Eccentric wheel; 63. Floating support assembly; 631. First elastic element; 632. Second elastic element; 633. Third elastic element; 7. Hinge. Detailed Implementation

[0031] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0032] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0034] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0035] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0036] In the process of small-batch membrane coating in the laboratory, in order to reduce the complexity of the operation and improve the consistency of membrane coating, such as... Figures 1-4 As shown, this utility model provides a film coating device. The film coating device includes a first cover plate 1, a second cover plate 2, two sets of mounting housings 5, two sets of drive mechanisms 4, a roller body 3, and two sets of adjustment mechanisms 6.

[0037] The second cover plate 2 is rotatably connected to the first cover plate 1, and a hollow area 22 is formed on the second cover plate 2. A roller body 3 is arranged in the hollow area 22, and two sets of mounting housings 5 ​​are rotatably connected to both ends of the roller body 3. Two sets of drive mechanisms 4 are arranged one-to-one with the two sets of mounting housings 5. The drive mechanisms 4 are located on the second cover plate 2 and are drively connected to the mounting housings 5, enabling the drive mechanisms 4 to drive the mounting housings 5 ​​to move within the hollow area 22. Two sets of adjustment mechanisms 6 are arranged one-to-one with the two sets of mounting housings 5. The adjustment mechanisms 6 are located between the roller body 3 and the mounting housings 5 ​​and are used to adjust the coating thickness of the roller body 3.

[0038] By using the drive mechanism 4 to drive the roller 3 for liquid removal, the need to remove the first cover plate 1 and the second cover plate 2 each time, as required by the traditional film preparation mold 100, is avoided, saving operation time. This also prevents the film from failing to wet due to the evaporation of moisture and reaction solution caused by prolonged operation, thus avoiding negative impacts on the reaction effect. Simultaneously, an adjustment mechanism 6 is located between the roller 3 and the mounting housing 5, effectively adjusting the coating thickness of the roller 3. These methods reduce operational complexity and improve the consistency of film coating.

[0039] In some embodiments, the drive mechanism 4 includes a drive element 41 and a transmission assembly. Both the drive element 41 and the transmission assembly are disposed on the second cover plate 2. The drive element 41 is driveably connected to the transmission assembly, and the mounting housing 5 is driveably connected to the transmission assembly. In this embodiment, the drive element 41 is a motor. By controlling the forward and reverse rotation of the motor, the movement direction of the mounting housing 5 can be controlled by the transmission assembly. This method facilitates control. In this embodiment, two sets of drive mechanisms 4 and mounting housing 5 are provided, and the two sets of drive mechanisms 4 are spaced apart along the length direction of the second cover plate 2. By arranging two sets of drive mechanisms 4, the stable movement of the roller 3 can be ensured. In other embodiments, the two sets of drive mechanisms 4 can also be spaced apart along the width direction of the second cover plate 2, without further restrictions.

[0040] In some embodiments, the transmission assembly includes a lead screw 43, a slide rail 44, and a slide table 42. The lead screw 43 and the slide rail 44 are disposed on the second cover plate 2, with the lead screw 43 and the slide rail 44 arranged parallel and spaced apart. The lead screw 43 is connected to the drive member 41. The slide table 42 is slidably disposed on the slide rail 44 and is screwed to the lead screw 43. The mounting housing 5 is connected to the slide table 42. During the movement of the driven roller 3, the drive member 41 drives the lead screw 43 to rotate, thereby driving the slide table 42, which is screwed to the lead screw 43, to move along the direction of the slide rail 44. Since the lead screw 43 and the slide table 42 are threadedly connected, the accuracy of movement can be guaranteed, and the transmission is stable and easy to control. The slide rail 44 cooperates with the slide table 42 to guide the movement of the slide table 42, thereby ensuring the stability of the movement of the mounting housing 5. This allows the roller 3 mounted on the mounting housing 5 to move stably with the mounting housing 5, thereby effectively removing excess liquid from the hollow area 22.

[0041] In some embodiments, the adjustment mechanism 6 includes an adjustment drive assembly 62, a floating support assembly 63, and a bearing assembly 61. The floating support assembly 63 is disposed in the mounting housing 5, and the bearing assembly 61 is disposed in the floating support assembly 63. The roller shaft of the roller body 3 is fixedly inserted through the bearing assembly 61. The adjustment drive assembly 62 is connected to the inner wall of the mounting housing 5 and is drively connected to the bearing assembly 61. The adjustment drive assembly 62 can adjust the coating thickness of the roller body 3 by adjusting the position of the bearing assembly 61 in the mounting housing 5. The adjustment drive assembly 62 can adjust the amount of liquid squeezed from the roller body 3. By setting the bearing assembly 61, the roller body 3 can be effectively supported while allowing the roller body 3 to rotate more smoothly relative to the mounting housing 5. By setting the floating support assembly 63, the roller body 3 can be floatingly supported, thereby ensuring stable movement and rotation of the roller body 3 and adapting to changes in film thickness.

[0042] In some embodiments, the bearing assembly 61 includes an angular contact bearing 611, a crossed roller bearing 612, and a bearing housing. The bearing housing is disposed in the mounting housing 5. The outer ring of the angular contact bearing 611 is fixedly disposed in the bearing housing. The angular contact bearing 611 is fixedly sleeved on the crossed roller bearing 612, which is fixedly sleeved on the roller shaft. The bearing housing cooperates with the floating support assembly 63 and the adjusting drive assembly 62. By providing the bearing housing, it is convenient to install the angular contact bearing 611 and it can effectively cooperate with the floating support assembly 63 and the adjusting drive assembly 62. By providing the angular contact bearing 611, the angular contact bearing 611 bears the radial force of the roller body 3, allowing the roller body 3 to float due to thermal expansion. The crossed roller bearing 612 bears the axial load converted from the pressure of the adjusting drive assembly 62 and resists the overturning moment caused by the excessive thickness of the film material, thus ensuring the stable movement of the roller body 3.

[0043] In some embodiments, the adjustment drive assembly 62 includes a cylinder 621, a first connecting rod 622, a second connecting rod, and an eccentric wheel 623. The cylinder 621 is connected to the inner wall of the mounting housing 5. One end of the first connecting rod 622 is rotatably connected to the piston rod of the cylinder 621, and the other end of the first connecting rod 622 is rotatably connected to the eccentric axis of the eccentric wheel 623. One end of the second connecting rod is rotatably connected to the rotation center axis of the eccentric wheel 623, and the other end of the second connecting rod is rotatably connected to the mounting housing 5. The eccentric wheel 623 abuts against the bearing seat. The cylinder 621 can drive the eccentric wheel 623 to rotate via the first connecting rod 622. When it is necessary to adjust the coating thickness of the roller 3, by controlling the piston of the cylinder 621 to extend, the piston of the cylinder 621 drives the connecting rod, and the connecting rod drives the eccentric wheel 623 to rotate, thereby pushing the bearing seat towards the first cover plate 1. For ease of control, a pneumatic lock is installed inside the cylinder 621. When the eccentric wheel 623 rotates to a certain extent, thereby pressing the roller 3 for coating, the pneumatic lock can lock the air pressure output of the cylinder 621, thus fixing the rotation amplitude of the eccentric wheel 623. Using the eccentric wheel 623 to control the coating results in high precision and fast response in controlling the proximity of the roller 3 to the film surface. The control cost using the cylinder 621 and the eccentric wheel 623 is low; moreover, it has high space utilization.

[0044] In some embodiments, the floating support assembly 63 includes a first elastic element 631, a second elastic element 632, and a third elastic element 633. The first elastic element 631, the second elastic element 632, and the third elastic element 633 are spaced apart between the inner wall of the mounting housing 5 and the bearing seat. The first elastic element 631 and the second elastic element 632 are arranged opposite to each other, and the third elastic element 633 is arranged opposite to the adjustment drive assembly 62. The first elastic element 631 and the second elastic element 632 are arranged horizontally, and the third elastic element 633 is arranged vertically, located at the lower end of the bearing seat. The first elastic element 631 and the second elastic element 632, positioned horizontally on both sides, can counteract the horizontal force during the downward pressing of the eccentric wheel 623, ensuring that the bearing seat only experiences vertical displacement when the eccentric wheel 623 deflects. When the eccentric wheel 623 deflects, it generates downward pressure that is transmitted to the bearing housing, causing the bearing housing to shift downward. The third elastic element 633, which is set in the vertical direction, gives the bearing housing a vertical upward force to keep it stable. When the air pressure output of the cylinder 621 decreases and the eccentric wheel 623 rotates to reduce the pressure on the bearing housing, the third elastic element 633 in the vertical direction can reset the roller body 3, keeping the eccentric wheel 623 and the bearing housing in close contact at all times.

[0045] In some embodiments, the film coating apparatus further includes a buffer pad 21, which is disposed at the end of the second cover plate 2 away from the drive member 41. The buffer pad 21 can cushion the slide table 42. By providing the buffer pad 21, the slide table 42 can be limited and cushioned when the roller 3 moves from the starting position to the ending position, thereby avoiding rigid collision between the slide table 42 and the edge of the second cover plate 2. The buffer pad 21 can be made of rubber or silicone, and no further restrictions are imposed here.

[0046] In some embodiments, the second cover plate 2 has multiple drainage holes, all of which are connected to the hollow area 22. During the process of using the roller 3 to expel liquid, the liquid can flow out quickly from the drainage holes.

[0047] In some embodiments, a hinge 7 is provided between the second cover plate 2 and the first cover plate 1, and the hinge 7 is connected to both the second cover plate 2 and the first cover plate 1. By providing the hinge 7, the second cover plate 2 is rotatably connected to the first cover plate 1, so that when placing the diaphragm, only the second cover plate 2 needs to be rotated to open and place the diaphragm in place.

[0048] In some embodiments, the film coating apparatus is placed on a mold 100, which has a liquid recovery hole and a receiving cavity. Liquid discharged from the drain hole enters the receiving cavity through the liquid recovery hole for recovery.

[0049] The working process of this film coating device is as follows:

[0050] When coating is required, an appropriate amount of slurry is poured into the hollow area 22 of the second cover plate 2. By controlling the pressure of the cylinder 621, the eccentric wheel 623 is driven to rotate, controlling the roller 3 to move closer to or further away from the film surface, thus controlling the coating thickness. Subsequently, the motor drives the lead screw 43 to control the movement of the mounting housing 5, thereby moving the roller 3 to achieve coating.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A film coating apparatus, characterized in that, include: First cover plate (1); The second cover plate (2) is rotatably connected to the first cover plate (1). The second cover plate (2) has a hollow area (22). A roller body (3) is provided in the hollow area (22). Two sets of mounting housings (5) are rotatably connected to the two ends of the roller body (3). Two sets of drive mechanisms (4) are provided one-to-one with the two sets of mounting housings (5). The drive mechanism (4) is provided on the second cover plate (2) and is connected to the mounting housing (5) in a transmission manner. The drive mechanism (4) can drive the mounting housing (5) to move the roller (3) in the hollow area (22) to coat the film. Two sets of adjustment mechanisms (6) are provided one-to-one with the two sets of mounting housings (5). The adjustment mechanism (6) is located between the roller body (3) and the mounting housing (5). The adjustment mechanism (6) is used to adjust the coating thickness of the roller body (3).

2. The film coating apparatus according to claim 1, characterized in that, The driving mechanism (4) includes a driving component (41) and a transmission assembly. The driving component (41) and the transmission assembly are both disposed on the second cover plate (2). The driving component (41) is connected to the transmission assembly in a transmission manner. The mounting housing (5) is connected to the transmission assembly in a transmission manner.

3. The film coating apparatus according to claim 2, characterized in that, The transmission assembly includes a lead screw (43), a slide rail (44), and a slide table (42). The lead screw (43) and the slide rail (44) are disposed on the second cover plate (2). The lead screw (43) and the slide rail (44) are arranged parallel to each other and spaced apart. The lead screw (43) is connected to the driving member (41) for transmission. The slide table (42) is slidably disposed on the slide rail (44). The slide table (42) is screwed to the lead screw (43). The mounting housing (5) is connected to the slide table (42).

4. The film coating apparatus according to claim 1, characterized in that, The adjustment mechanism (6) includes an adjustment drive assembly (62), a floating support assembly (63), and a bearing assembly (61). The floating support assembly (63) is disposed in the mounting housing (5), and the bearing assembly (61) is disposed in the floating support assembly (63). The roller shaft of the roller body (3) is fixedly inserted in the bearing assembly (61). The adjustment drive assembly (62) is connected to the inner wall of the mounting housing (5) and is drively connected to the bearing assembly (61). The adjustment drive assembly (62) can adjust the coating thickness of the roller body (3) by adjusting the position of the bearing assembly (61) in the mounting housing (5).

5. The film coating apparatus according to claim 4, characterized in that, The bearing assembly (61) includes an angular contact bearing (611), a crossed roller bearing (612), and a bearing housing. The bearing housing is disposed in the mounting housing (5). The outer ring of the angular contact bearing (611) is fixedly disposed in the bearing housing. The angular contact bearing (611) is fixedly sleeved on the crossed roller bearing (612). The crossed roller bearing (612) is fixedly sleeved on the roller shaft. The bearing housing cooperates with the floating support assembly (63) and the adjustment drive assembly (62).

6. The film coating apparatus according to claim 5, characterized in that, The adjustment drive assembly (62) includes a cylinder (621), a first connecting rod (622), a second connecting rod, and an eccentric wheel (623). The cylinder (621) is connected to the inner wall of the mounting housing (5). One end of the first connecting rod (622) is rotatably connected to the piston rod of the cylinder (621), and the other end of the first connecting rod (622) is rotatably connected to the eccentricity axis of the eccentric wheel (623). One end of the second connecting rod is rotatably connected to the rotation center axis of the eccentric wheel (623), and the other end of the second connecting rod is rotatably connected to the mounting housing (5). The eccentric wheel (623) abuts against the bearing seat. The cylinder (621) can drive the eccentric wheel (623) to rotate through the first connecting rod (622).

7. The film coating apparatus according to claim 5, characterized in that, The floating support assembly (63) includes a first elastic element (631), a second elastic element (632), and a third elastic element (633). The first elastic element (631), the second elastic element (632), and the third elastic element (633) are spaced apart between the inner wall of the mounting housing (5) and the bearing seat. The first elastic element (631) and the second elastic element (632) are arranged opposite to each other, and the third elastic element (633) is arranged opposite to the adjustment drive assembly (62).

8. The film coating apparatus according to claim 3, characterized in that, It also includes a buffer pad (21) disposed at one end of the second cover plate (2) away from the drive member (41), the buffer pad (21) being able to buffer the slide (42).

9. The film coating apparatus according to claim 1, characterized in that, The second cover plate (2) has multiple drainage holes, all of which are connected to the hollow area (22).

10. The film coating apparatus according to claim 1, characterized in that, A hinge (7) is provided between the second cover plate (2) and the first cover plate (1), and the hinge (7) is connected to the second cover plate (2) and the first cover plate (1) respectively.

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