A double-sided coating control system and control method

Abstract

A double-sided coating control system and control method, the double-sided coating control system comprising: a coating module and a drying unit; a film layer thickness detection module is arranged between the coating module and the drying unit; the film layer thickness detection module detects the actual thickness size of the coating layer on the surface of the coating substrate in a wet film state after passing through the coating module; the coating module comprises a doctor blade unit, the doctor blade unit adjusts the actual thickness size of the coating layer on the surface of the coating substrate in a wet film state; a first film layer thickness detection unit is further arranged after the drying unit, which is used to detect the actual thickness size of the coating layer on the corresponding surface of the coating substrate after passing through the drying unit; a control unit adjusts the gap between the doctor blade unit and the corresponding surface of the coating substrate according to the actual thickness size of the coating layer on the surface of the coating substrate in a wet film state, the actual thickness size of the coating layer on the corresponding surface of the coating substrate after drying, and the target thickness size of the coating layer on the corresponding surface of the coating substrate after drying.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a double-sided coating control system and control method. Background Technology

[0002] Coating is the process of applying functional materials to a substrate surface in place of gases. Coating can be achieved through methods such as gravure coating, doctor blade coating, slot extrusion, spraying, dip coating, or roll coating. Coating equipment typically includes an unwinding unit, a coating unit, a drying unit, a laminating unit, and a rewinding unit.

[0003] To achieve stable and high-quality coatings, existing coating equipment has added a film thickness detection device after the drying unit. However, existing film thickness detection devices require stopping the machine to check the film thickness after drying, followed by manual adjustment of the coating solution volume. This repeated stopping and manual verification wastes resources and increases production costs. Furthermore, the above measurement method can only detect the dried coating. How to detect the coating in a wet state without stopping the machine remains an unsolved problem. Especially when coating both sides simultaneously, timely adjustment of the coating thickness has become a pressing technical challenge in the industry. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a double-sided coating control system and method that enables the detection and adjustment of the coating liquid thickness on the coating substrate without stopping the machine.

[0005] To achieve the above objectives, this application provides a double-sided coating control system, comprising:

[0006] Coating module and drying unit;

[0007] A film thickness detection module is located between the coating module and the drying unit;

[0008] The film thickness detection module is used to detect the actual thickness of the coating on the substrate surface in a wet film state after coating by the coating module.

[0009] The coating module includes a doctor blade unit, which is used to adjust the actual thickness of the coating on the surface of the substrate in a wet film state.

[0010] A first layer thickness detection unit is provided after the drying unit, which is used to detect the actual thickness of the coating on the corresponding surface of the coating substrate after drying in the drying unit.

[0011] The control unit adjusts the gap between the doctor blade unit and the corresponding surface of the coating substrate based on the actual coating thickness on the surface of the coating substrate in the wet film state, the actual coating thickness on the corresponding surface of the coating substrate after drying, and the target coating thickness on the corresponding surface of the coating substrate after drying.

[0012] Furthermore, the film thickness detection module detects the distance from the surface of the coated substrate to the film thickness detection module when it is not coated;

[0013] The film thickness detection module is also used to detect the distance from the coating on the corresponding surface of the substrate in a wet film state to the film thickness detection module after coating.

[0014] The absolute value of the difference between the distance from the surface of the coated substrate to the film thickness detection module when it is not coated and the distance from the coating on the corresponding surface of the coated substrate to the film thickness detection module when it is in a wet film state is the actual thickness of the coating on the corresponding surface of the coated substrate in the wet film state.

[0015] Furthermore, the control unit calculates the gap dimension between the doctor blade unit and the corresponding surface of the coating substrate according to the following formula:

[0016] ;

[0017] This represents the actual thickness of the coating after drying.

[0018] This refers to the distance between the surface of the coated substrate in the wet film state and the film thickness detection module.

[0019] The distance between the surface of the uncoated substrate and the film thickness detection module;

[0020] This refers to the solid content in the coating solution;

[0021] a is a coefficient, 1 < a < 100;

[0022] This refers to the gap dimension between the doctor blade unit and the corresponding surface of the coating substrate.

[0023] Furthermore, the film thickness detection module includes a second film thickness detection unit and a third film thickness detection unit;

[0024] The second and third film thickness detection units are located on both sides of the coated substrate.

[0025] Furthermore, both the second and third film thickness detection units are laser confocal probes;

[0026] The first layer thickness detection unit is an X-ray camera.

[0027] Furthermore, the scraper unit includes:

[0028] First scraper body and second scraper body;

[0029] The first scraper body and the second scraper body are arranged facing each other, and a gap is provided between the first scraper body and the second scraper body for the substrate to be coated to pass through.

[0030] The first scraper position adjustment unit is disposed on the first scraper body and is used to adjust the gap size between the first scraper body and the first surface of the coating substrate.

[0031] The second scraper position adjustment unit is disposed on the second scraper body and is used to adjust the gap size between the second scraper body and the second surface of the coating substrate.

[0032] The first surface and the second surface of the coating substrate are two opposite sides of the coating substrate.

[0033] Furthermore, the scraper unit also includes:

[0034] The first limiting unit is retractably mounted on the inlet side of the first scraper body;

[0035] The second limiting unit is retractably mounted on the inlet side of the second scraper body;

[0036] The first limiting unit and the second limiting unit are on the same horizontal plane.

[0037] Furthermore, both the end of the first limiting unit facing the second limiting unit and the end of the second limiting unit facing the first limiting unit are provided with adjustment heads.

[0038] Furthermore, the adjusting head is spherical, and / or hemispherical, and / or sheet-like.

[0039] To achieve the above objectives, this application also provides a double-sided coating control method, which employs the aforementioned double-sided coating control system and includes the following steps:

[0040] Obtain the actual coating thickness on the surface of the substrate in the wet film state, the actual coating thickness on the corresponding surface of the substrate after drying, and the target coating thickness on the corresponding surface of the substrate after drying.

[0041] The actual thickness of the coating on the surface of the dried substrate is compared with the target thickness of the coating on the corresponding surface of the dried substrate, and the gap between the doctor blade and the corresponding surface of the substrate is adjusted according to the comparison results.

[0042] Furthermore, the step of adjusting the gap between the doctor blade and the corresponding surface of the coating substrate is calculated using the following formula:

[0043] ;

[0044] This represents the actual thickness of the coating after drying.

[0045] This refers to the distance between the surface of the coated substrate in the wet film state and the film thickness detection module.

[0046] The distance between the surface of the uncoated substrate and the film thickness detection module;

[0047] This refers to the solid content in the coating solution;

[0048] a is a coefficient, 1 < a < 100;

[0049] This refers to the gap dimension between the doctor blade unit and the corresponding surface of the coating substrate.

[0050] The double-sided coating control system and method provided in this application enable real-time monitoring of the coating liquid thickness on the surface of the coating substrate, allowing adjustment of the coating liquid thickness without stopping the machine. This improves work efficiency, saves production costs, avoids resource waste, and enhances market competitiveness. The first and second limiting units control the consistency of the thickness of the coating on both sides during double-sided coating. Depending on the needs, the first and second limiting units can also control the individual thickness of the coating on each side during double-sided coating. The first and second scraper position adjustment units adjust the gaps between the first and second scraper bodies and the coating substrate, thereby adjusting the thickness of the double-sided coating on the substrate.

[0051] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Attached Figure Description

[0052] The accompanying drawings are provided to further illustrate the present application and form part of the specification. Together with the embodiments of the present application, they serve to explain the present application but do not constitute a limitation thereof. In the drawings:

[0053] Figure 1 This is a schematic diagram of the double-sided coating control system according to an embodiment of this application;

[0054] Figure 2 This is a schematic diagram of the coating module structure according to an embodiment of this application;

[0055] Figure 3 This is a schematic diagram of the coating control method according to an embodiment of this application.

[0056] Figure label:

[0057] 10-Coating module; 101-Reservoir; 1011-Limiting roller; 102-Doctor unit; 1021-First doctor blade body; 1022-Second doctor blade body; 1023-First doctor blade position adjustment unit; 1024-Second doctor blade position adjustment unit; 1025-First limiting unit; 1026-Second limiting unit; 1027-Adjusting head; 103-Second film thickness detection unit; 104-Third film thickness detection unit; 105-Unwinding unit; 106-Drying unit; 107-Coating substrate; 108-First film thickness detection unit; 109-Rewinding unit; 110-Traction unit. Detailed Implementation

[0058] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0059] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0060] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0061] It should be noted that the terms "first" and "second" may be used in this application only to distinguish different devices, components or parts, and are not used to define the order of functions performed by these devices, components or parts or their interdependence.

[0062] It should be noted that the terms "one" and "more" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be understood as "one or more". "More" should be understood as two or more.

[0063] The double-sided coating control system of this application includes:

[0064] Coating module 10 and drying unit 106;

[0065] A film thickness detection module is located between the coating module 10 and the drying unit 106;

[0066] The film thickness detection module is used to detect the actual thickness of the coating on the surface of the substrate 107 in a wet film state after coating by the coating module 10.

[0067] The coating module 10 includes a doctor blade unit 102, which is used to adjust the actual thickness of the coating on the surface of the substrate 107 in a wet film state.

[0068] A first film thickness detection unit 108 is provided after the drying unit 106, which is used to detect the actual thickness of the coating on the corresponding surface of the coating substrate 107 after drying by the drying unit 106.

[0069] The control unit adjusts the gap between the scraper unit 102 and the corresponding surface of the coating substrate 107 based on the actual coating thickness of the surface of the coating substrate 107 in the wet film state, the actual coating thickness of the corresponding surface of the coating substrate 107 after drying, and the target coating thickness of the corresponding surface of the coating substrate 107 after drying.

[0070] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0071] Example 1

[0072] Figure 1 This is a schematic diagram of the double-sided coating control system according to an embodiment of this application. Figure 2 This is a schematic diagram of the coating module structure according to an embodiment of this application, such as... Figure 1-2 As shown, the double-sided coating control system of the present application embodiment will be described in detail below.

[0073] In this embodiment, the double-sided coating control system is used to coat the coating substrate 107 on both sides simultaneously, especially when the coating substrate 107 has a mesh structure or when the coating substrate 107 is coated on both sides simultaneously.

[0074] In one exemplary embodiment, the double-sided coating control system of this application includes: a coating module 10, a film thickness detection module, a drying unit 106, and a first film thickness detection unit 108.

[0075] In one exemplary embodiment, the coating module 10 includes a doctor blade unit 102 and a liquid storage tank 101. The doctor blade unit 102 is located above the liquid storage tank 101, for example, the doctor blade unit 102 is positioned directly above the liquid storage tank 101. Figure 1 As shown.

[0076] In one exemplary embodiment, the liquid storage tank 101 is used to hold the coating liquid. When the coating module 10 performs coating operation on the coating substrate 107, the coating substrate 107 is immersed in the coating liquid in the liquid storage tank 101 and then enters the drying unit 106 for drying treatment after passing through the doctor blade unit 102.

[0077] In one exemplary embodiment, the coating module 10 includes a doctor blade unit 102, which is used to adjust the coating thickness on the surface of the substrate 107 in a wet film state.

[0078] In one exemplary embodiment, a film thickness detection module is disposed between the coating module 10 and the drying unit 106.

[0079] In one exemplary embodiment, the film thickness detection module is used to detect the actual thickness of the coating on the surface of the substrate 107 in a wet film state after being coated by the coating module 10.

[0080] In one exemplary embodiment, a first film thickness detection unit 108 is provided after the drying unit 106. The first film thickness detection unit 108 is used to detect the actual thickness of the coating on the corresponding surface of the coating substrate 107 after drying by the drying unit 106.

[0081] In one exemplary embodiment, the first film thickness detection unit 108 is an X-ray inspection instrument.

[0082] In one exemplary embodiment, the film thickness detection module includes a second film thickness detection unit 103 and a third film thickness detection unit 104.

[0083] In one exemplary embodiment, the second film thickness detection unit 103 and the third film thickness detection unit 104 are arranged on both sides of the coating substrate 107; for example, the second film thickness detection unit 103 is disposed on the front side of the coating substrate 107, and the third film thickness detection unit 104 is disposed on the back side of the coating substrate 107.

[0084] In one exemplary embodiment, the second film thickness detection unit 103 and the third film thickness detection unit 104 are symmetrically arranged on both sides of the coating substrate 107 as needed.

[0085] In one exemplary embodiment, both the second film thickness detection unit 103 and the third film thickness detection unit 104 are laser confocal probes.

[0086] In one exemplary embodiment, the film thickness detection module detects the distance from the surface of the coated substrate 107 to the film thickness detection module when it is not coated; this can be understood as follows: when it is not coated, the second film thickness detection unit 103 is used to measure the distance between the front side of the coated substrate 107 and the second film thickness detection unit 103, and the third film thickness detection unit 104 is used to measure the distance between the back side of the coated substrate 107 and the third film thickness detection unit 104.

[0087] In one exemplary embodiment, "uncoated" in this application refers to the state when there is no coating liquid in the storage tank 101, that is, when there is no coating liquid on the surface of the coating substrate 107.

[0088] In one exemplary embodiment, the thickness of the coating substrate 107 in this application embodiment can be detected by a separate thickness measuring device, or it can be the thickness data of the coating substrate 107 obtained in advance before the coating operation.

[0089] In an exemplary embodiment, the film thickness detection module is further configured to detect the distance from the coating on the corresponding surface of the coated substrate 107 in the wet film state to the film thickness detection module after coating. It can be understood that the second film thickness detection unit 103 is further configured to measure the distance between the coating surface on the front side of the coated substrate 107 in the wet film state and the second film thickness detection unit 103, and the third film thickness detection unit 104 is further configured to measure the distance between the coating surface on the back side of the coated substrate 107 in the wet film state and the third film thickness detection unit 104.

[0090] In an exemplary embodiment, the absolute value of the difference between the distance from the surface of the coating substrate 107 to the film thickness detection module when it is uncoated and the distance from the coating on the corresponding surface of the coating substrate 107 to the film thickness detection module when it is in a wet film state is the actual thickness of the coating on the corresponding surface of the coating substrate 107 in the wet film state. Taking the second film thickness detection unit 103 as an example, when it is uncoated, that is, when there is no coating liquid on the surface of the coating substrate 107, the absolute value of the difference between the distance from the front side of the coating substrate 107 to the second film thickness detection unit 103 and the distance from the coating surface on the front side of the coating substrate 107 to the second film thickness detection unit 103 when there is coating liquid on the surface of the coating substrate 107 is the actual thickness of the coating on the front side of the coating substrate 107 in the wet film state.

[0091] In one exemplary embodiment, the double-sided coating control system of this application further includes a control unit.

[0092] In one exemplary embodiment, the control unit adjusts the gap between the scraper unit 102 and the corresponding surface of the coating substrate 107 based on the actual coating thickness on the surface of the coating substrate 107 in the wet film state, the actual coating thickness on the corresponding surface of the coating substrate 107 after drying, and the target coating thickness on the corresponding surface of the coating substrate 107 after drying. Here, taking the second film thickness detection unit 103 as an example, the control unit adjusts the gap between the scraper unit 102 and the front surface of the coating substrate 107 based on the actual coating thickness on the front surface of the coating substrate 107 in the wet film state, the actual coating thickness on the front surface of the coating after drying, and the target coating thickness on the front surface of the coating substrate 107 after drying.

[0093] In one exemplary embodiment, the control unit calculates the gap dimension between the doctor blade unit 102 and the corresponding surface of the coating substrate 107 according to the following formula:

[0094] ;

[0095] This represents the actual thickness of the coating after drying.

[0096] The distance between the surface of the coated substrate 107 in the wet film state and the film thickness detection module;

[0097] The distance between the surface of the uncoated substrate 107 and the film thickness detection module;

[0098] This refers to the solid content in the coating solution;

[0099] a is a coefficient, 1 < a < 100;

[0100] This refers to the gap dimension between the doctor blade unit 102 and the corresponding surface of the coating substrate 107.

[0101] In one exemplary embodiment, the above formula is explained using the example of adjusting the coating thickness on the front side of the coating substrate 107. This is the actual thickness of the coating on the front side of the substrate 107 after drying. This refers to the distance between the front surface of the coated substrate 107 in its wet film state and the second film thickness detection unit 103. This refers to the distance between the front surface of the uncoated substrate 107 and the second film thickness detection unit 103. This represents the ratio of solids to the total amount of solids in the coating solution. This refers to the gap between the doctor blade unit 102 and the front side of the coating substrate 107.

[0102] In one exemplary implementation, when When the value is positive, the gap between the corresponding surfaces of the doctor blade unit 102 and the coating substrate 107 needs to be increased accordingly; when When the value is negative, the gap between the corresponding surfaces of the doctor blade unit 102 and the coating substrate 107 needs to be reduced by the corresponding size.

[0103] In an exemplary embodiment, similarly, when it is necessary to adjust the coating thickness on the reverse side of the coating substrate 107, the same method and calculation formula are used to adjust the gap between the third film thickness detection unit 104 and the reverse side of the coating substrate 107.

[0104] In an exemplary embodiment, the scraper unit 102 of this application includes: a first scraper body 1021 and a second scraper body 1022, as shown below. Figure 2 As shown.

[0105] In an exemplary embodiment, the first scraper body 1021 and the second scraper body 1022 are arranged facing each other, and a gap is provided between the first scraper body 1021 and the second scraper body 1022 for the substrate 107 to be coated to pass through. It can be understood that the substrate 107 passes through the gap between the first scraper body 1021 and the second scraper body 1022, or it can be understood that the scraper unit 102 simultaneously adjusts the thickness of the surface coating liquid on the front and back sides of the substrate 107.

[0106] In an exemplary embodiment, the scraper unit 102 further includes a first scraper position adjustment unit 1023, which is disposed on the first scraper body 1021 and is used to adjust the gap size between the first scraper body 1021 and the first surface of the coating substrate 107. It can be understood that the adjustment of the gap size between the first scraper body 1021 and the first surface of the coating substrate 107 is achieved by the first scraper position adjustment unit 1023.

[0107] In one exemplary embodiment, the scraper unit 102 further includes a second scraper position adjustment unit 1024, which is disposed on the second scraper body 1022 and is used to adjust the gap size between the second scraper body 1022 and the second surface of the coating substrate 107. It can be understood that the adjustment of the gap size between the second scraper body 1022 and the second surface of the coating substrate 107 is achieved by the second scraper position adjustment unit 1024.

[0108] In one exemplary embodiment, both the first scraper position adjustment unit 1023 and the second scraper position adjustment unit 1024 can be screw structures, such as... Figure 2 As shown, the gap between the coating substrate 107 and the first scraper body 1021 and the second scraper body 1022 is adjusted by rotating itself.

[0109] In an exemplary embodiment, the first surface and the second surface of the coating substrate 107 are two opposite sides of the coating substrate 107. This application uses the first surface as the front and the second surface as the back for explanation and description. That is, in this application, the double-sided coating of the coating substrate 107 means coating the front and back sides of the coating substrate 107.

[0110] In one exemplary embodiment, the scraper unit 102 further includes a first limiting unit 1025 and a second limiting unit 1026.

[0111] In one exemplary embodiment, the first limiting unit 1025 is telescopically disposed on the inlet side of the first scraper body 1021. For example, the first limiting unit 1025 is a lead screw structure, and the distance between the coating substrate 107 and the first scraper body 1021 can be adjusted by a knob.

[0112] In one exemplary embodiment, the second limiting unit 1026 is telescopically disposed on the inlet side of the second scraper body 1022. For example, the second limiting unit 1026 is a lead screw structure, and the distance between the coating substrate 107 and the second scraper body 1022 can be adjusted by a knob.

[0113] In one exemplary embodiment, the first limiting unit 1025 and the second limiting unit 1026 are on the same horizontal plane.

[0114] In an exemplary embodiment, the first limiting unit 1025 and the second limiting unit 1026 can adjust the gap size between the front and back sides of the coating substrate 107 and the second film thickness detection unit 103 and the third film thickness detection unit 104, respectively, without adjusting the first scraper body 1021 and the second scraper body 1022. This can be understood as the cooperation of the first limiting unit 1025 and the second limiting unit 1026 achieving the same coating thickness on both sides of the coating substrate 107, or controlling the coating thickness while ensuring the total coating thickness on the surface of the coating substrate 107 remains unchanged. The difference in coating thickness between the front and back sides of substrate 107; for example, if the thickness of the substrate 107 itself is 0.15 mm, and the technical requirement is that the total coating thickness of the front and back sides of the substrate 107 is 0.2 mm, and the coating thickness on one side of the substrate 107 is 0.15 mm and the coating thickness on the other side is 0.05 mm, then the above technical requirements can be achieved by adjusting the gap between the first scraper body 1021 and the second scraper body 1022 to 0.35 mm, while controlling the gap between the first scraper body 1021 and the surface of the substrate 107 to 0.15 mm.

[0115] In one exemplary embodiment, the end of the first limiting unit 1025 facing the second limiting unit 1026 and the end of the second limiting unit 1026 facing the first limiting unit 1025 are both provided with adjusting heads 1027.

[0116] In one exemplary embodiment, the adjusting head 1027 may be fixedly connected or indirectly connected as needed; it can be understood that when the first limiting unit 1025 is adjusted, the adjustment of the coating substrate 107 is achieved by the movement of the adjusting head 1027 connected to it.

[0117] In one exemplary embodiment, the adjusting head 1027 is spherical, and / or hemispherical, and / or plate-shaped.

[0118] In an exemplary embodiment, when the adjusting head 1027 is hemispherical, the angle between the horizontal plane of the adjusting head 1027 and the coating substrate 107 in the gap is in the range of 30°-180°, for example, the angle between the horizontal plane of the adjusting head 1027 and the coating substrate 107 in the gap is 90°.

[0119] In one exemplary embodiment, the convex curved portion of the adjusting head 1027 contacts the coating substrate 107. This arrangement ensures that the adjusting head 1027 supports the coating substrate 107 while avoiding any adverse effects of the adjusting head 1027 on the coating substrate 107.

[0120] In one exemplary embodiment, when the adjusting head 1027 is plate-shaped, the adjusting head 1027 extends from the inlet side of the scraper to the outlet side.

[0121] In one exemplary embodiment, the sheet-like adjustment head 1027 can be a horizontal sheet or a curved sheet; when the adjustment head 1027 is a curved sheet, the convex curved side faces the coating substrate 107.

[0122] In an exemplary embodiment, the liquid storage tank 101 of this application is disposed below the inlet side of the scraper unit 102, and a limiting roller 1011 is provided in the liquid storage tank 101 as needed.

[0123] In one exemplary embodiment, the double-sided coating control system of this application further includes: an unwinding unit 105, a winding unit 109, and a traction unit 110.

[0124] In one exemplary embodiment, the traction unit 110 is used to traction the dried coated substrate 107 and is disposed between the winding unit 109 and the drying unit 106. Of course, if necessary, the traction unit 110 may also be disposed between the winding unit 109 and the first film thickness detection unit 108.

[0125] In one exemplary embodiment, the unwinding unit 105 is disposed in front of the liquid storage tank 101. The unwinding unit 105 is used to release the coating substrate 107. The unwound coating substrate 107 enters the liquid storage tank 101. The coating liquid in the liquid storage tank 101 wets the front and back sides of the coating substrate 107. The coating substrate 107 is then restricted by the limiting roller 1011 and transferred to the entrance of the doctor blade unit 102.

[0126] In one exemplary implementation, such as Figure 1 and Figure 2 As shown, the liquid storage tank 101 is located directly below the scraper unit 102; while the drying unit 106 is located directly above the scraper unit 102, as... Figure 1 As shown; that is, after the coating operation is completed, the coating substrate 107 enters the drying unit 106 vertically upward.

[0127] In one exemplary embodiment, the drying unit 106 is provided with a heating module as needed for drying the coated substrate 107 that enters the drying unit 106.

[0128] Example 2

[0129] Figure 3 This is a schematic flowchart of the coating control method according to an embodiment of this application. The following will be combined with... Figure 3 The double-sided coating control method of the embodiments of this application will be described in detail.

[0130] In one exemplary embodiment, the double-sided coating control method of this application adopts the double-sided coating control system described above.

[0131] First, in step 201, the actual thickness of the coating on the surface of the substrate in the wet film state, the actual thickness of the coating on the corresponding surface of the substrate after drying, and the target thickness of the coating on the corresponding surface of the substrate after drying are obtained.

[0132] In one exemplary embodiment, the actual coating thickness dimensions of the front and back sides of the coating substrate 107 in a wet film state, the actual coating thickness dimensions of the front and back sides of the coating substrate 107 in a dry film state, and the target coating thickness dimensions of the front and back sides of the coating substrate 107 in a dry film state are obtained.

[0133] In an exemplary embodiment, taking the coating on the front side of the coating substrate 107 as an example, the actual thickness of the coating on the front side of the coating substrate 107 in the wet film state is obtained. This data can be obtained by measuring the distance between the laser confocal probe and the front side of the coating substrate 107 when it is not coated, and the distance between the laser confocal probe and the coating surface on the front side of the coating substrate 107 in the wet film state, respectively, when the position of the laser confocal probe remains unchanged.

[0134] In one exemplary embodiment, the actual thickness of the coating on the front side of the coated substrate 107 is obtained directly by X-ray inspection.

[0135] In an exemplary embodiment, obtaining the actual coating thickness on the surface of the coated substrate 107 in the wet film state and the actual coating thickness on the corresponding surface of the coated substrate 107 after drying is to find the dimensional correspondence of the coating on the same surface of the coated substrate 107 in different states.

[0136] Step 202: Compare the actual coating thickness of the dried coating substrate to the corresponding surface with the target coating thickness of the dried coating substrate, and adjust the gap between the scraper and the corresponding surface of the coating substrate according to the comparison result.

[0137] In one exemplary embodiment, the actual thickness of the coating on the corresponding surface of the dried coating substrate 107 is compared with the target thickness of the coating on the corresponding surface of the dried coating substrate 107, and the gap between the scraper and the corresponding surface of the coating substrate 107 is adjusted according to the comparison result. Taking the coating on the front side of the coating substrate 107 as an example, when the actual thickness of the coating on the front side of the dried coating substrate 107 is greater than the target thickness of the coating on the front side, the gap between the scraper and the front side of the coating substrate 107 is reduced; when the actual thickness of the coating on the front side of the dried coating substrate 107 is less than the target thickness of the coating on the front side of the coating substrate 107, the gap between the scraper and the front side of the coating substrate 107 is increased.

[0138] In one exemplary embodiment, the step of adjusting the gap between the doctor blade and the corresponding surface of the coating substrate 107 is performed using the following calculation formula:

[0139] ;

[0140] This represents the actual thickness of the coating after drying.

[0141] The distance between the surface of the coated substrate 107 in the wet film state and the film thickness detection module;

[0142] The distance between the surface of the uncoated substrate 107 and the film thickness detection module;

[0143] This refers to the solid content in the coating solution;

[0144] a is a coefficient, 1 < a < 100;

[0145] This refers to the gap dimension between the doctor blade unit 102 and the corresponding surface of the coating substrate 107.

[0146] In one exemplary embodiment, as needed, since both sides of the coating substrate 107 need to be coated, when both sides of the coating substrate 107 need to be adjusted, the adjustment rules and calculation formulas are the same as the front adjustment strategy described above.

[0147] It will be understood by those skilled in the art that the above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-sided coating control system, characterized in that, It includes: a coating module and a drying unit; A film thickness detection module is disposed between the coating module and the drying unit; The film thickness detection module is used to detect the actual thickness of the coating on the substrate surface in a wet film state after being coated by the coating module. The coating module includes a doctor blade unit, which is used to adjust the actual thickness of the coating on the surface of the coating substrate in a wet film state. A first layer thickness detection unit is provided after the drying unit, which is used to detect the actual thickness of the coating on the corresponding surface of the coating substrate after drying by the drying unit. The control unit adjusts the gap between the scraper unit and the corresponding surface of the coating substrate based on the actual coating thickness of the coating on the surface of the coating substrate in the wet film state, the actual coating thickness of the coating on the corresponding surface of the coating substrate after drying, and the target coating thickness of the coating on the corresponding surface of the coating substrate after drying. The film thickness detection module detects the distance from the surface of the coated substrate to the film thickness detection module when the substrate is not coated. The film thickness detection module is also used to detect the distance from the coating on the corresponding surface of the coated substrate in a wet film state to the film thickness detection module after coating. The absolute value of the difference between the distance from the surface of the uncoated substrate to the film thickness detection module and the distance from the coating layer on the corresponding surface of the coated substrate to the film thickness detection module in the wet film state is the actual thickness of the coating layer on the corresponding surface of the coated substrate in the wet film state. The control unit calculates the gap dimension between the doctor blade unit and the corresponding surface of the coating substrate according to the following formula: ； This represents the actual thickness of the coating after drying. This refers to the distance between the surface of the coated substrate in the wet film state and the film thickness detection module. The distance between the surface of the uncoated substrate and the film thickness detection module; This refers to the solid content in the coating solution; a is a coefficient, 1 < a < 100; This refers to the gap dimension between the doctor blade unit and the corresponding surface of the coating substrate; The scraper unit includes: First scraper body and second scraper body; The first scraper body and the second scraper body are arranged facing each other, and a gap is provided between the first scraper body and the second scraper body for the substrate to be coated to pass through; A first scraper position adjustment unit is disposed on the first scraper body and is used to adjust the gap size between the first scraper body and the first surface of the coating substrate. The second scraper position adjustment unit is disposed on the second scraper body and is used to adjust the gap size between the second scraper body and the second surface of the coating substrate. The first surface and the second surface of the coating substrate are two opposite sides of the coating substrate; The first limiting unit is retractably disposed on the inlet side of the first scraper body; The second limiting unit is retractably disposed on the inlet side of the second scraper body; The first limiting unit and the second limiting unit are on the same horizontal plane.

2. The double-sided coating control system according to claim 1, characterized in that, The film thickness detection module includes a second film thickness detection unit and a third film thickness detection unit. The second film thickness detection unit and the third film thickness detection unit are arranged on both sides of the coated substrate.

3. The double-sided coating control system according to claim 2, characterized in that, Both the second film thickness detection unit and the third film thickness detection unit are laser confocal probes; The first layer thickness detection unit is an X-ray camera.

4. The double-sided coating control system according to claim 1, characterized in that, An adjustment head is provided at the end of the first limiting unit facing the second limiting unit and at the end of the second limiting unit facing the first limiting unit.

5. The double-sided coating control system according to claim 4, characterized in that, The adjusting head is spherical, and / or hemispherical, and / or sheet-like.

6. A method for controlling double-sided coating, employing the double-sided coating control system described in any one of claims 1-5, characterized in that, Includes the following steps: Obtain the actual coating thickness on the surface of the coated substrate in the wet film state, the actual coating thickness on the corresponding surface of the coated substrate after drying, and the target coating thickness on the corresponding surface of the coated substrate after drying; The actual thickness of the coating on the surface of the dried coating substrate is compared with the target thickness of the coating on the corresponding surface of the dried coating substrate, and the gap between the scraper unit and the corresponding surface of the coating substrate is adjusted according to the comparison result.

7. The double-sided coating control method according to claim 6, characterized in that, The step of adjusting the gap between the doctor blade unit and the corresponding surface of the coating substrate is calculated using the following formula: ； This represents the actual thickness of the coating after drying. This refers to the distance between the surface of the coated substrate in the wet film state and the film thickness detection module. The distance between the surface of the uncoated substrate and the film thickness detection module; This refers to the solid content in the coating solution; a is a coefficient, 1 < a < 100; This refers to the gap dimension between the doctor blade unit and the corresponding surface of the coating substrate.

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