CN116943982A

CN116943982A - Coating equipment of many longmen structure

Info

Publication number: CN116943982A
Application number: CN202210381057.5A
Authority: CN
Inventors: 郑新峰; 王锦山; 张恒
Original assignee: Shanghai De Hu Coating Equipment Co ltd
Current assignee: Shanghai De Hu Coating Equipment Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-10-27

Abstract

The present disclosure describes a coating apparatus of a multi-gantry structure, which includes a base for carrying a coating object, a feed mechanism including a plurality of support portions that are cross members of a gantry structure and have a main body portion above the base, and two legs formed at both ends of the main body portion and respectively arranged at opposite sides of the base, and a plurality of distribution portions including a housing having a chamber that accommodates slurry, and a discharge port communicating with the chamber, the housing of each distribution portion being respectively supported by the main body portion of each support portion and the discharge port of each distribution portion being directed toward the base, and a drive mechanism including two guide rails respectively arranged at opposite sides of the base, and a drive portion that is respectively provided at the two guide rails by air bearing, the drive portion driving the support portions to move along the guide rails. According to the present disclosure, a coating apparatus of a multi-gantry structure can be provided.

Description

Coating equipment of many longmen structure

Technical Field

The invention relates to the technical field of coating, in particular to a multi-gantry coating device.

Background

The coating equipment is equipment commonly used for surface coating process treatment of film products. The coating equipment can coat a layer of materials with special functions such as glue, paint, ink and the like on the surface of the film product. In recent years, coating apparatuses are also increasingly used for producing separators for lithium batteries, functional coatings for solar batteries, and the like. In the case of a solar cell, since the solar cell generally has a plurality of different functional layers such as an absorption layer, a hole transport layer, an electron transport layer, and an electrode layer, it is necessary to coat the plurality of layers on the solar cell by a coating apparatus.

In the prior art, the efficiency of a common single gantry type flat coating device is lower when the flat coating device is used for coating for a plurality of times; in many flat coating apparatuses, a guide rail is disposed at the outer periphery of a coating platform, and the coating platform or the gantry is driven to move along the guide rail relatively to perform multiple coating. For example, patent document publication No. CN208146329U discloses a multiple gantry type flat coating apparatus having a plurality of coating dies, and the plurality of coating dies can move along a guide rail provided at the bottom of the coating stage to pass over the coating stage for coating, but friction is easily generated between the coating stage or gantry and the guide rail as the number of movements increases during coating, a relatively large error may be generated at the time of precision coating, and the thickness of the formed film layer may be difficult to have high uniformity.

Disclosure of Invention

The present disclosure has been made in view of the above-described conventional art, and an object thereof is to provide a coating apparatus of a multi-gantry structure capable of improving uniformity of film thickness.

To this end, the present disclosure provides a coating apparatus of a multi-gantry structure, which includes a base for carrying a coating object, a feed mechanism including a plurality of support portions that are cross members of a gantry structure and have a main body portion above the base and two legs formed at both ends of the main body portion and respectively arranged at opposite sides of the base, and a plurality of dispensing portions including a housing having a chamber for accommodating a slurry and a discharge port communicating with the chamber, the housing of each dispensing portion being respectively supported by the main body portion of each support portion and the discharge port of each dispensing portion being directed toward the base, and a drive mechanism including two guide rails respectively arranged at opposite sides of the base and two drive portions respectively provided to the two guide rails by air bearings, the drive portions driving the support portions to move along the guide rails.

In the coating apparatus according to the present disclosure, a coating object is carried by a base, and by providing a feed mechanism having a plurality of distribution portions, multi-film coating can be performed and efficiency of the multi-film coating is facilitated to be improved; in addition, the support portions are provided in an air-floating manner on the two guide rails located on the opposite sides of the base, and friction generated when the support portions move along the guide rails can be reduced, so that the coating accuracy can be improved and the uniformity of the film thickness of the coating forming film layer can be improved.

In addition, in the coating apparatus according to the present disclosure, optionally, the plurality of support portions are arranged side by side along the base, and a predetermined distance is provided between two adjacent support portions. This facilitates multi-layer coating.

In addition, in the slit coating apparatus according to the present disclosure, a drying device is optionally provided between adjacent two support portions. This can advantageously improve the efficiency of multi-layer coating.

In addition, in the coating apparatus according to the present disclosure, the two guide rails may be annular. In this case, the plurality of support portions can perform a circumferential movement along the annular guide rail, and the multilayer paste can be applied from the same side to the other side of the application object, thereby contributing to an improvement in uniformity of film thickness.

In addition, in the coating apparatus according to the present disclosure, the drive portion air bearing is optionally designed such that the support portion is provided in an air-floating manner to the two guide rails. Thereby enabling friction-free movement of the support portion on the guide rail.

In addition, in the coating apparatus according to the present disclosure, optionally, the leg is suspended on the guide rail near one end of the guide rail, at least one of the two guide rails is provided with a guide groove, and the leg has a protrusion matched with the guide groove. In this case, it is possible to facilitate driving the support portion to move along the guide rail, and to improve stability of the support portion in movement, thereby improving uniformity of coating.

According to the coating apparatus of the multi-gantry structure of the present disclosure, it is possible to apply to multi-film coating and to improve uniformity of film thickness of coating forming film layers.

Drawings

The present disclosure will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram showing a coating apparatus to which examples of the present disclosure relate.

Fig. 2 is a schematic diagram illustrating a feeding mechanism according to an example of the present disclosure.

Fig. 3 is a schematic diagram showing a distributing section according to an example of the present disclosure.

Fig. 4 is a schematic diagram showing a guide rail to which examples of the present disclosure relate.

Fig. 5 is a schematic flow chart showing coating of a coating object by a coating apparatus according to an example of the present disclosure.

Fig. 6 is a schematic diagram showing multiple film layers on the surface of a coating object to which the examples of the present disclosure relate.

Reference numerals illustrate:

100 … coating equipment, 10 … base, 20 … feeding mechanism, 21 … dispensing section, 211 … chamber, 212 … housing, 213 … discharge port, 214 … sensor, 22 … support section, 221 … main body section, 222 … foot, 30 … drive mechanism, 31 … guide rail, 32 … air bearing, 40 … precoating section, 2 … coating object.

Detailed Description

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same members are denoted by the same reference numerals, and overlapping description thereof is omitted. In addition, the drawings are schematic, and the ratio of the sizes of the components to each other, the shapes of the components, and the like may be different from actual ones.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, in this disclosure, such as a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present disclosure relates to a coating apparatus of a multi-gantry structure, which is a coating apparatus for coating a slurry on a surface of a coating object to form a multi-film layer. The coating apparatus according to the present disclosure can be used for multi-film coating and can improve uniformity of film thickness. Wherein, each film layer in the multiple film layers can be the same slurry or different slurries. In addition, the coating equipment disclosed by the invention can be also suitable for coating a single film layer, and can be adjusted according to actual needs.

In the present embodiment, the object to be coated may be a sheet material, a block material, or the like. The coating apparatus according to the present disclosure will be described later by taking a sheet-like coating object in a long strip shape as an example.

The coating apparatus of the multi-gantry structure according to the present embodiment may be simply referred to as a coating apparatus, a coating device, or the like, but it should be understood that the above-mentioned names are all for referring to the apparatus for coating a slurry on a surface of a coating object to form a film on the surface according to the present embodiment, and should not be construed as limiting.

It should be noted that, in the present disclosure, relative terms such as "one side", "opposite other side", "upward", "downward", "upper surface", "lower surface", and the like refer to a normal operation posture, and should not be construed as limiting.

Fig. 1 is an overall schematic diagram showing a coating apparatus 100 according to an example of the present embodiment.

In the present embodiment, the coating apparatus 100 may include a base 10, a feeding mechanism 20, and a driving mechanism 30 (see fig. 1). The base 10 may be used to carry the coating object 2, the feeding mechanism 20 may be used to supply slurry to the coating object 2, and the driving mechanism 30 may drive the base 10 and the feeding mechanism 20 to move relatively. For example, in the example shown in fig. 1, the driving mechanism 30 may drive the feeding mechanism 20 to move in the direction D1 or D2, and the slurry may be supplied to the coating object 2 when the feeding mechanism 20 passes over the coating object 2, thereby forming a film layer on the surface of the coating object 2.

In some examples, the viscosity of the slurry may range from 0 to 15000cps. In some examples, the viscosity of the slurry may range from 1 to 10000cps. In addition, in some examples, the thickness of the film layer formed by the slurry on the surface of the coating object 2 may be 10nm to 450 μm. For example, the thickness of the film layer formed by the slurry on the surface of the object to be coated 2 may be 10nm, 20nm, 50nm, 100nm, 1 μm, 10 μm, 100 μm, 200 μm, 250 μm, 300 μm, 400 μm, or 450 μm. The thickness of the film layer can be adjusted according to actual needs.

In some examples, as described above, the coating apparatus 100 may include a base station 10 for carrying the coated object 2. In some examples, the base 10 may have a bearing surface that bears the coated object 2 (see fig. 1).

In some examples, the bearing surface of the base 10 may be equal to or slightly larger than the area of the coated object 2. Thereby, the coating object 2 can be easily carried.

In some examples, the sides of the base 10 may be provided with a stopper (not shown). The limiting portion may be a plurality of protrusions extending upward from the bearing surface of the base 10, and when the coating object 2 is borne on the base, at least two adjacent side edges of the coating object 2 can abut against the limiting portion. In this case, the coating object 2 can be defined at a predetermined position, so that coating of a predetermined region on the coating object 2 can be facilitated.

In some examples, the base 10 may have a gas passage passing through the bearing surface, and an adsorption portion (not shown) communicating with the gas passage. In this case, the gas can be sucked through the gas passage by the adsorbing portion, whereby a negative pressure adsorbing mechanism can be provided so as to more firmly carry the coating object 2.

In some examples, the base 10 may also have a recess (not shown) formed by the bearing surface being concave. In this case, when the coating object 2 is carried on the carrying surface and the adsorbing portion sucks the gas, a larger area of the negative pressure region can be formed by the concave portion, thereby carrying the coating object 2 more firmly. In some examples, the recess may include a plurality of dot-shaped recesses formed on the bearing surface. In other examples, the recess may also include a plurality of groove-like recesses formed on the bearing surface. In some examples, the recesses may be evenly distributed across the bearing surface. Thereby, a more uniform negative pressure can be formed on the bearing surface.

In some examples, the base station 10 may be annular (not shown). For example, the base 10 may have a circular ring shape, a square ring shape, or the like. In some examples, the base station 10 may also be in the form of a ribbon.

In some examples, the susceptor may be made of marble, stainless steel, aluminum alloy, or porous ceramic, among other materials. The feeding mechanism 20 and the driving mechanism 30 may be directly or indirectly provided on the base. In some examples, the feeding mechanism 20 may be movably disposed on the base, and the driving mechanism 30 may drive the feeding mechanism 20 to move along the extending direction of the base. The extending direction of the base may refer to the length direction thereof, such as the directions D1 and D2 shown in fig. 1.

Fig. 2 is a schematic diagram illustrating a feeding mechanism 20 according to an example of the present disclosure. Fig. 3 is a schematic diagram showing the distributing section 21 according to the example of the present disclosure. In some examples, the feed mechanism 20 may include a dispensing portion 21, and a support portion 22. The dispensing section 21 may be used to supply the slurry to the coating object 2, and the supporting section 22 may be used to support the dispensing section 21.

In some examples, the support 22 may be a beam of a gantry structure (see fig. 2). Specifically, the support portion 22 may have an arch-shaped main body portion 221, and two legs 222 (i.e., a leg 222a and a leg 222 b) formed at both ends of the main body portion 221 (see fig. 2). In some examples, the body portion 221 may be located above the base 10, and the two legs 222 may be disposed on opposite sides of the base 10, respectively. In some examples, the span of the body portion 221 may be greater than the width of the abutment 10, and the camber may be the height of the abutment 10. This can facilitate the drive mechanism 30 to drive the support 22 from moving along the base 10 to the opposite side.

In some examples, the dispensing portion 21 may include a housing 212 having a chamber 211, and a discharge port 213 (see fig. 3) in communication with the chamber 211. The chamber 211 may be used to contain slurry, and slurry located within the chamber 211 may exit the chamber 211 through a discharge port 213.

In some examples, the housing 212 of the dispensing portion 21 may be supported by the body portion 221 of the support portion 22, and the discharge port 213 of each dispensing portion 21 may be oriented toward the base 10. In this case, the slurry contained in the dispensing section 21 may be supplied to the coating object 2 located on the base 10 through the discharge port 213 toward the base 10.

In some examples, the tap 213 may be slit-shaped. In this case, it can be convenient to form a sheet-like film layer. In some examples, the length direction of the tap 213 may be orthogonal to the extension direction of the base 10. In this case, by setting the longitudinal direction of the discharge port 213 to be orthogonal to the extending direction of the base 10, it is possible to facilitate formation of a continuous film layer on the surface of the coating object 2 when supplying the slurry thereto, and it is advantageous to improve uniformity of film thickness.

In some examples, the length of the outlet 213 may be not less than the outer diameter of the coated object 2. In some examples, the length of the tap 213 may be approximately equal to the outer diameter of the coated object 2. In other examples, the length of the outlet 213 may be greater than the outer diameter of the coated object 2. However, examples of the present embodiment are not limited thereto, and in some examples, the length of the discharge port 213 may be smaller than the outer diameter of the coating object 2.

In some examples, the square coating area formed when the discharge port 213 is moved in the prescribed direction from the extending direction of the base 10 may cover the coating object 2. That is, the projection surface formed by the discharge port 213 on the base 10 can cover the coating object 2 while the discharge port 213 is moved in the predetermined direction from the extending direction of the base 10. In this case, by driving the supporting portion 22 to move the dispensing portion 21 in the extending direction of the base 10 and causing the square coating area formed thereby to cover the coating object 2, a coating mechanism suitable for coating the coating object 2 can be provided.

In some examples, the number of supports 22 may be one or more. In some examples, the number of distribution portions 21 may be one or more, and the number of distribution portions 21 may be consistent with the number of support portions 22. For example, in the example shown in fig. 1, the feeding mechanism 20 may include 3 supporting portions 22 (i.e., supporting portion 22a, supporting portion 22b, and supporting portion 22 c) and 3 dispensing portions 21 (i.e., dispensing portion 21a, dispensing portion 21b, and dispensing portion 21 c), and the housing 212 of each dispensing portion 21 may be supported by the body portion 221 of each supporting portion 22, respectively. In this case, multi-film coating can be facilitated.

In some examples, a plurality of support portions 22 may be arranged side by side along the base 10 with a predetermined spacing between adjacent support portions 22. The predetermined pitch may be a constant value or a value within a certain range. In this case, by arranging the plurality of support portions 22 side by side along the base 10, multi-film coating can be facilitated; in addition, by providing the adjacent two support portions 22 at a predetermined distance from each other, it is possible to advantageously control the time interval for applying the slurry to the application target 2, thereby improving the film forming effect.

In some examples, the body portions 221 of the plurality of support portions 22 may be at equal heights from the plane of the base 10. In this case, it is possible to facilitate fixing positions of the respective dispensing portions 21 fixed to the respective support portions 22 to have the same height from the plane of the base 10, thereby improving uniformity of film thickness.

In some examples, different slurries may be contained in the chambers 211 of the plurality of dispensing portions 21. Thereby, it is possible to facilitate coating multiple film layers of different slurries. In addition, in some examples, the number of the distributing portions 21 and the supporting portions 22 and the manner of assembly of the slurry may be adjusted according to actual needs. For example, when it is necessary to apply 4 different kinds of slurries to the application object 2, 4 distribution portions 21 may be provided to accommodate the 4 different kinds of slurries in the respective distribution portions 21, and a corresponding number of support portions 22 may be provided to support the plurality of distribution portions 21. For example, when it is necessary to apply 2 different slurries of which 4 layers are sequentially arranged to the object 2, 2 distribution units 21 may be provided to accommodate 2 different slurries, or 4 distribution units 21 may be provided to accommodate 2 different slurries.

In some examples, the lengths of the discharge ports 213 of the plurality of distribution portions 21 may be non-uniform. In this case, it may be convenient to apply the paste to different areas of the object 2. For example, taking a rectangular sheet-like coated object 2 as an example, it is preset that 3 layers of film should be coated on the surface thereof, but the 3 rd layer (i.e., the outermost layer) should cover only the square area at the middle thereof, at which time 3 distribution portions 21 are arranged, and the length of the discharge port 213 of the 3 rd distribution portion 21 is adjusted so that the square coating area formed when moving can cover the square area at the middle thereof (to be described later in detail with reference to the drawings).

In some examples, a sensor 214 may be provided on one side of the tap 213. The sensor 214 can be used to sense the distance from the surface of the base 10, so that the distance between the discharge port 213 and the coating object 2 can be calibrated, and thus, uniformity of the film thickness of the coating forming film can be advantageously improved. In some examples, the sensor 214 may be a laser sensor.

In some examples, a drying device (not shown) may be provided between adjacent two of the support portions 22. Generally, in the case of multi-layer coating, a first layer of coating material is generally supplied to the surface of the object 2 to be coated, and after drying to form a first layer of coating material, a second layer of slurry is applied to the first layer of coating material, and then the second layer of coating material is dried to form a second layer of coating material, and finally a multi-layer structure is formed on the surface of the object 2 to be coated. In this case, by providing the drying device between the adjacent two support portions 22, the time for drying the slurry to form a film can be advantageously shortened, and the efficiency of multi-film coating can be improved.

In some examples, the drying device may have a temperature raising mechanism (e.g., an infrared heater). The temperature raising mechanism may act on a region located in the base 10 where the coating object 2 is carried. This can raise the temperature of the object 2 to be coated and/or the surroundings thereof, thereby shortening the time for drying the slurry to form a film.

In some examples, the drying device may have an air knife. The air knife can output an air flow and act on the region where the coating object 2 is carried on the base 10. Thus, the time for drying and film forming the slurry can be shortened by the action of the air knife.

In some examples, the drying device may be provided to the support 22 and move synchronously with the movement of the support 22. In other examples, the drying device may also be directly provided to the base 10.

In some examples, the feed mechanism 20 may also include a pre-coat portion 40 (see fig. 1). The pre-coating portion 40 may be disposed below the discharge port 213 and on a moving path of the discharge port 213 toward the base 10. The pre-coating section 40 may be located upstream of the coating object 2, and the supply mechanism 20 may supply the slurry to the pre-coating section 40 in advance before supplying the slurry to the coating object 2 via the discharge port 213. In this case, by supplying the slurry to the pre-coating portion 40 in advance to discharge and fill the gas in the discharge port 213 before supplying the slurry to the coating object 2, it is possible to facilitate more uniform coating.

Fig. 4 is a schematic diagram showing the guide rail 31 to which the examples of the present disclosure relate.

In some examples, as described above, the coating apparatus 100 may include a drive mechanism 30. The drive mechanism 30 may drive the relative movement of the base 10 or the supply mechanism for coating.

In some examples, the drive mechanism 30 may drive the support 22 to move relative to the base 10. Specifically, the driving mechanism 30 may include two guide rails 31 (i.e., guide rail 31a and guide rail 31 b) disposed on opposite sides of the base 10, respectively, and a driving portion (not shown) provided to the two guide rails 31, and the driving portion may drive the supporting portion 22 to move along the guide rails 31. In this case, when the support 22 passes the coating object 2 located on the base 10, the supply portion provided to the support 22 with the discharge port 213 facing the base 10 may supply the slurry to the coating object 2 to form a film layer on the surface of the coating object 2.

In some examples, the drive mechanism 30 may drive each support 22 to move separately. The rate at which each support 22 moves may be the same or different. Thereby, it is possible to adapt to the coating requirements of different slurries.

In some examples, two guide rails 31 of the drive mechanism 30 disposed on opposite sides of the base 10 may be annular. In this case, when multi-film coating is required, the feeding mechanism 20 may be driven to perform a clockwise or counterclockwise circumferential movement along the two guide rails 31, and the multi-film slurry may be coated from the same side to the other side of the coating object 2, thereby advantageously improving uniformity of film thickness.

In some examples, the two legs 222 of the support 22 may be disposed on the two rails 31, respectively, by air levitation or magnetic levitation. In this case, the undesired friction generated when the support portion 22 moves along the guide rail 31 can be reduced, and the coating accuracy can be improved to improve the uniformity of the film thickness of the coating forming film layer.

In some examples, the two legs 222 (i.e., legs 222a and 222 b) of the support 22 may be disposed on the two rails 31 (i.e., rails 31a and 31 b) by way of the air bearings 32 (i.e., air bearings 32a and 32 b), respectively (see fig. 4). The air bearing 32 may also be referred to as an air bearing, and is a bearing that uses air elastic potential energy to perform a supporting function. In this case, friction and friction loss with the guide rail 31 can be reduced by the air bearing 32 during the movement of the support portion 22 along the guide rail 31, and the speed and distance of the movement of the support portion 22 can be easily controlled, which is advantageous in stabilizing the accuracy, thereby improving uniformity of film thickness of the coating forming film layer.

In some examples, the end of the leg 222 proximate the rail 31 may be suspended on the rail. For example, as shown in fig. 4, one end of each of the two legs 222 near the two guide rails 31 is arched to be suspended from the two guide rails 31. In this case, it is possible to facilitate driving the support portion 22 to move along the guide rail 31, and to improve stability of the support portion 22 in movement, thereby improving uniformity of coating.

In some examples, at least one rail 31 of the two rails 31 may be provided with a guide groove 33 and the leg 222 may have a protrusion 23 (see fig. 4) that mates with the guide groove 33. In this case, it is possible to facilitate driving the support portion 22 to move along the guide rail 31, and to improve stability of the support portion 22 in movement, thereby improving uniformity of coating.

In some examples, the surface of rail 31 relatively close to air bearing 32 and feet 222 may be a smooth surface. In this case, it can be convenient to control the distance of the air bearing 32 from the surface of the guide rail 31 so that the two legs 222 are at the same level, whereby it can be advantageous to improve the uniformity of coating. For example, the surface of the rail 31 relatively close to the air bearing 32 and the feet 222 may be a smooth marble countertop.

In some examples, the drive portion may have a gas supply system (not shown). In this case, a stable air flow can be supplied to the air bearing 32 by the air supply system so that the support portion 22 can be provided to the guide rail 31 by air suspension, thereby enabling the support portion 22 to perform a frictionless movement on the guide rail 31. In some examples, the gas supply system may provide air, nitrogen, hydrogen, helium, or carbon dioxide gas to the air bearing 32 as a pneumatic source.

In some examples, as described above, the drive section air bearing is designed such that the support section 22 is disposed in an air-suspended manner on both guide rails 31. Thereby, the support portion 22 can perform a friction-free movement on the guide rail 31, and thus, uniformity of film thickness can be advantageously improved.

In some examples, the air bearing 32 may have a drive channel and a support channel (not shown) into which gas provided by the gas supply device enters, respectively, to provide force to the air bearing 32 to float in the rail 31 and force to push it to move back and forth. In some examples, the interior of the air bearing 32 may also be provided with liquid cooling conduits (not shown).

Fig. 5 is a schematic flow chart showing coating of the coating object 2 by the coating apparatus 100 according to the example of the present disclosure. Fig. 6 is a schematic diagram showing multiple film layers on the surface of the coated object 2 to which the examples of the present disclosure relate.

Hereinafter, a flow of coating the coating object 2 by the coating apparatus 100 according to the present disclosure will be described in detail with reference to fig. 5 and 6.

As shown in fig. 5, a process of multi-film coating a coating object 2 by the coating apparatus 100 according to the present disclosure includes the following flow: placing the coating object 2 on the base 10 (step S100); aligning the positions of the coating object 2 and the base 10 (step S200); calibrating the interval between the discharge port 213 and the coating object 2 (step S300); supplying the slurry to the precoating section 40 for precoating (step S400); supplying the slurry to the coating object 2 (step S500); drying to form a first film layer (step S600); repeating steps S200 to S600 a plurality of times to form a multi-film layer on the surface of the object 2 to be coated (step S700); the coating object 2 is unloaded (step S800). Thus, the coating apparatus 100 according to the present disclosure can coat multiple film layers on the surface of the coating object 2.

In some examples, in step S100, the coated object 2 may be carried on the carrying surface of the base 10. In some examples, a negative pressure may be formed between the coating object 2 and the bearing surface by the suction portion of the base 10 to suck the coating object 2.

In some examples, in step S200, the positions of the coating object 2 and the base 10 may be aligned by the limit portion of the coating apparatus 100. Specifically, the alignment can be achieved by moving the coating object 2 to the limit portions where the adjacent two sides thereof abut on the base 10. In this case, the coating object 2 can be fixed at a predetermined position, and thus coating of a predetermined region on the coating object 2 can be facilitated.

In some examples, in step S300, the spacing between the discharge opening 213 and the coating object 2 may be calibrated by the sensor 214 of the coating apparatus 100. This can advantageously improve uniformity of film thickness of the coating film.

In some examples, in step S400, air in the discharge port 213 may be discharged and filled with slurry by precoating, thereby enabling more uniform coating to be facilitated.

In some examples, in step S500 and step S600, the first slurry may be supplied to the coating object 2 and dried to form the first film layer.

In some examples, in step S700, the second slurry may be supplied to the coating object 2, and dried to form a second film layer; the third slurry is supplied to the object to be coated 2, and dried to form the third film … …, and the nth slurry is supplied to the object to be coated 2, and dried to form the nth film. Wherein n is an integer greater than or equal to 2.

In some examples, the first slurry, the second slurry, the third slurry, and the nth slurry may be the same or different slurries.

In some examples, the coating apparatus 100 may be provided with n dispensing parts 21, and n slurries, which may be the same or different, may be respectively contained in the n dispensing parts 21 in step S700.

In some examples, in step S500 and step S700, the feeding mechanism 20 is driven to move along the extending direction of the base 10 by the driving mechanism 30 according to the example of the present disclosure, and the slurry is supplied to the coating object 2 via the discharge port 213 when the discharge port 213 passes over the coating object 2 located on the base 10.

In some examples, in step S700, a schematic view of the multiple film layers may be as shown in fig. 6, and the multiple film layers may include a first film layer, a second film layer, a third film layer, and a … … nth film layer sequentially stacked from the coating object 2. The materials of the film layers can be the same or different, and can be adjusted according to actual needs. In fig. 6, the thickness of each film layer is adjusted for more clearly illustrating the multiple film layers, which does not mean that the thickness of each film layer is only consistent with that in the picture, but can be adjusted according to actual needs.

In some examples, as previously described, the lengths of the discharge ports 213 of the plurality of dispensing portions 21 may be non-uniform so as to facilitate the application of the slurry to different areas of the coating object 2. For example, the first film layer, the second film layer, and the third film layer may be coated on different areas of the surface of the coating object 2, and the materials of the respective film layers may be the same or different. Thereby, it is possible to adapt to different coating requirements.

In some examples, in step S400, the suction of the gas by the suction portion may be stopped first to release the coating object 2, and then the coating object 2 may be unloaded from the base 10.

In summary, according to the present disclosure, it is possible to provide a coating apparatus 100 of a multi-gantry structure capable of improving uniformity of film thickness.

While the disclosure has been described in detail in connection with the drawings and examples, it is to be understood that the foregoing description is not intended to limit the disclosure in any way. Modifications and variations of the present disclosure may be made as desired by those skilled in the art without departing from the true spirit and scope of the disclosure, and such modifications and variations fall within the scope of the disclosure.

Claims

1. A coating device with a multi-gantry structure is characterized in that,

comprises a base station, a feeding mechanism and a driving mechanism,

the base station is used for bearing a coating object,

the feeding mechanism comprises a plurality of supporting parts and a plurality of distributing parts, wherein the supporting parts are beams of a gantry structure and are provided with a main body part positioned above the base, and two supporting feet which are formed at two ends of the main body part and are respectively arranged at two opposite sides of the base, the distributing parts comprise a shell with a cavity for containing slurry and a discharge hole communicated with the cavity, the shell of each distributing part is respectively supported by the main body part of each supporting part, the discharge hole of each distributing part faces the base,

the driving mechanism comprises two guide rails and a driving part, wherein the two guide rails are respectively arranged on two opposite sides of the base, the two supporting legs are respectively arranged on the two guide rails through air bearing, and the driving part drives the supporting part to move along the guide rails.

2. The coating apparatus of claim 1, wherein,

the plurality of support portions are arranged side by side along the base, and adjacent two support portions are spaced apart from each other by a predetermined distance.

3. Coating apparatus according to claim 2, characterized in that,

a drying device is arranged between two adjacent supporting parts.

4. The coating apparatus of claim 1, wherein,

the two guide rails are annular.

5. The coating apparatus of claim 1, wherein,

the drive section air bearing is designed such that the support section is arranged in an air-suspended manner on the two guide rails.

6. The coating apparatus of claim 1, wherein,

the support leg is close to one end suspension frame of guide rail is on the guide rail, at least one guide rail in two guide rails is equipped with the guide slot, the support leg have with guide slot assorted arch.