WO2023029640A1 - Coating quality test method and system - Google Patents

Abstract

The present application relates to the technical field of battery manufacturing. Provided are a coating quality test method and system. The coating quality test method comprises: determining whether a test position belongs to a first coating region or a second coating region of a base material; according to a determination result, acquiring a first actual coating length of the first coating region in the transmission direction of the base material and a second actual coating length of the second coating region in the transmission direction of the base material; and according to the first actual coating length and the second actual coating length, adjusting the coating length of the first coating region to be coated and the coating length of the second coating region to be coated, such that the coating length of the first coating region to be coated and the coating length of the second coating region to be coated are controlled to be within a preset range. The coating length of a first coating region to be coated and the coating length of a second coating region to be coated can be controlled to be within a preset range, such that the coating length of the first coating region and the coating length of the second coating region both meet production requirements, thus improving the coating quality.

Description

[Title of invention established by ISA under Rule 37.2] Coating quality inspection method and system

Cross References to Related Applications

This application This application claims the priority of the Chinese patent application 202111015359.2 filed on August 31, 2021, entitled "Coating Quality Detection and System", the entire content of which is incorporated herein by reference.

technical field

The present application relates to the technical field of battery manufacturing, in particular, to a coating quality detection method and system.

Background technique

The coating process is widely used in the coating of substrates such as paper and film and composite packaging. Coating process is also a key process of battery manufacturing. Coating quality is closely related to battery capacity, life, safety, etc. At present, the coating process in the field of battery manufacturing mainly relies on manual quality control and adjustment. The control accuracy is not high, the adjustment speed is slow, and the production The efficiency is low, causing a lot of material waste, increasing a lot of labor costs, and seriously affecting corporate profits.

Therefore, how to improve coating quality has become a technical problem to be solved urgently in the field of battery manufacturing technology.

Contents of the invention

The embodiment of the present application provides a coating quality inspection method and system to measure the coating quality of pole pieces in the battery manufacturing process.

In the first aspect, the embodiment of the present application provides a coating quality detection method, including:

Judging whether the detection position belongs to the first coating area or the second coating area of the substrate, the coating thickness of the first coating area is greater than the coating thickness of the second coating area;

Obtaining a first actual coating length of the first coating area along the driving direction of the substrate and a second actual coating length of the second coating area along the driving direction of the substrate according to the judgment result;

Adjust the coating length of the first coating area to be coated according to the first actual coating length, adjust the coating length of the second coating area to be coated according to the second actual coating length, so as to The coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range.

In the above technical scheme, the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area are obtained, and the first actual coating length and the first The preset coating length of the coating area is compared. If the first actual coating length does not meet the preset coating length of the first coating area, it is necessary to carry out the coating length of the uncoated first coating area. Adjustment, compare the second actual coating length with the preset coating length of the second coating area, if the second actual coating length does not meet the preset coating length of the second coating area, it is necessary to The coating length of the second coating area of the cloth is adjusted so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, In order to make the coating lengths of the first coating area and the second coating area meet the production requirements, the coating quality is improved.

In some embodiments of the first aspect of the present application, the first actual coating length of the first coating area along the driving direction of the substrate and the first actual coating length of the second coating area along the driving direction of the substrate are acquired according to the judgment result. The second actual coating length of the transmission direction of the substrate, including: obtaining the first actual coating length, including:

Obtaining the transverse coordinates of the detection position along the transmission direction of the substrate;

Based on the horizontal coordinates of the detection position, the first actual coating length L _n is obtained, wherein, L _n =Σ(y _n+1 -y _n ), y _n+1 represents the nth in the detection position The horizontal coordinate of +1 coating position, y _n is the horizontal coordinate of the nth coating position in the detection position, and n is a natural number greater than or equal to 0;

Obtaining the second actual coating length includes:

Obtaining the transverse coordinates of the detection position along the transmission direction of the substrate;

Based on the horizontal coordinates of the detection position, the second actual coating length H _n is obtained, wherein, H _n =Σ(h _n+1 - h _n ), h _n+1 represents the nth in the detection position +1 horizontal coordinate of the coating position, h _n is the horizontal coordinate of the nth coating position in the detection position, and n is a natural number greater than or equal to 0.

In the above technical solution, the acquisition of the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area are all realized in an accumulative manner, and the continuous detection of the The position abscissa coordinates of the coated first coating area and the second coating area, and sequentially accumulate the abscissa coordinate difference between adjacent positions until the last abscissa coordinate of the first coated area and the The last horizontal coordinate of the second coating area to be coated to obtain the first actual coating length and the second actual coating length, so that the detection of the actual coating length is more accurate, so that the first coating area to be coated and The coating length of the second coating area to be coated can be adjusted more accurately, so that the coating quality is better.

In some embodiments of the first aspect of the present application, the first actual coating length of the first coating area along the driving direction of the substrate and the first actual coating length of the second coating area along the driving direction of the substrate are acquired according to the judgment result. The second actual coating length of the transmission direction of the above-mentioned substrate, including:

Obtaining the first actual coating length includes:

Obtaining the coating start transverse coordinate _ystart of the detection position along the transmission direction of the substrate and obtaining the coating end transverse coordinate _yend of the detection position along the transmission direction of the substrate, the first actual Coating length L _n = y _end - y _start ;

Obtaining the second actual coating length includes:

Obtaining the coating start transverse coordinate _hstart of the detection position along the transmission direction of the substrate and obtaining the coating end transverse coordinate hend of the detection position along the transmission direction of the substrate, the _second actual Coating length H _n = h _end - h _start .

In the above technical solution, the first actual coating length is obtained by obtaining the difference between the coating start horizontal coordinate and the coating end horizontal coordinate in the first coating area, and the second actual coating length is obtained by obtaining the coating in the second coating area The difference between the coating start horizontal coordinate and the coating end horizontal coordinate of the area is obtained, the acquisition method is simple and convenient, the number of feedbacks is less, and the detection efficiency is improved.

In some embodiments of the first aspect of the present application, the judging whether the detection position belongs to the first coating area or the second coating area of the substrate includes: judging whether the detection position belongs to according to the coating thickness of the detection position whether the first coated area or the second coated area;

The coating quality detection method also includes:

Acquiring the first actual coating thickness of the first coating area and the second actual coating thickness of the second coating area according to the judgment result;

Adjust the coating thickness of the first coating area to be coated according to the first actual coating thickness, adjust the coating thickness of the second coating area to be coated according to the second actual coating thickness, so as to The coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range.

In the above technical scheme, the first actual coating thickness of the first coating area that has been coated and the second actual coating thickness of the second coating area that has been coated are obtained, and the first actual coating thickness and the first The preset coating thickness of the coating area is compared. If the first actual coating thickness does not meet the preset coating thickness of the first coating area, it is necessary to carry out the coating length of the uncoated first coating area. Adjustment, compare the second actual coating thickness with the preset coating thickness of the second coating area, if the second actual coating thickness does not meet the preset coating thickness of the second coating area, then it is necessary to The coating thickness of the second coating area of the cloth is adjusted so that the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range, In order to make the coating thicknesses of the first coating area and the second coating area both meet the production requirements and improve the coating quality.

In some embodiments of the first aspect of the present application, the coating quality detection method also includes:

Acquiring the first actual coating area density of the first coating area and the second actual coating area density of the second coating area according to the judgment result;

Adjust the coating area density of the first coating area to be coated according to the first actual coating area density, adjust the coating area of the second coating area to be coated according to the second actual coating area density Density, so as to control the coating area density of the first coating area to be coated and the coating area density of the second coating area to be coated within a preset range.

In the above-mentioned technical scheme, obtain the first actual coating area density of the first coating area that has been coated and the second actual coating area density of the second coating area that has been coated, and divide the first actual coating area density Compared with the preset coating area density of the first coating area, if the first actual coating area density does not meet the preset coating area density of the first coating area, then it is necessary to The coating area density of the area is adjusted, and the second actual coating area density is compared with the preset coating area density of the second coating area. If the second actual coating area density does not meet the preset coating area density of the second coating area Coating area density, then it is necessary to adjust the coating area density of the uncoated second coating area so that the coating area density of the first coating area to be coated and the second coating area to be coated The coating area density of the cloth area is controlled within the preset range, so that the coating area density of the first coating area and the second coating area can meet the production requirements, ensure the flatness of the coating, and improve the coating quality.

In some embodiments of the first aspect of the present application, obtaining the first actual coating area density of the first coating area includes:

Obtaining the coating area density at the detection position before the coating at the detection position is dried and obtaining the coating area density at the detection position after the coating at the detection position is dried;

Acquiring the second actual coating area density of the second coating area, including:

The coating area density of the second coating area is acquired before the coating at the detection position is dried, and the coating area density of the detection position is acquired after the coating at the detection position is dried.

In the above technical solution, by obtaining the surface density before drying and the surface density after drying at the detection position, the coating surface density of the detection position can be checked twice before drying and after drying, so that the coating surface density to be coated can be The area density of the first coating area and the second coating area of the cloth is adjusted twice to further improve the coating quality. If only the coating surface density before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating surface density after drying is controlled, from the coating position to the drying process There is a certain distance between the positions, so that the adjustment has a hysteresis, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the area density of the detection position before drying can predict whether the area density is qualified in advance, and can perform an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop, so as to better treat the first coating. The coating area density control of the first coating area and the second coating area to be coated, to achieve the purpose of the coating area density consistency of the first coating area of the substrate and the coating area density of the second coating area .

In some embodiments of the first aspect of the present application, obtaining the first actual coating thickness of the first coating area includes:

Obtaining the coating thickness at the detection position before drying the coating at the detection position and obtaining the coating thickness at the detection position after drying the coating at the detection position;

Obtaining the second actual coating thickness of the second coating area includes:

The coating thickness at the detection position is obtained before the coating at the detection position is dried, and the coating thickness at the detection position is obtained after the coating at the detection position is dried.

In the above technical solution, by obtaining the surface density of the detection position before drying and the coating thickness after drying, the coating thickness of the detection position can be detected twice before drying and after drying, and the coating to be coated can be The thickness of the first coating area and the second coating area are adjusted twice to further improve the coating quality. If only the coating thickness before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating thickness after drying is controlled, there will be a difference from the coating position to the drying position. A certain distance makes the adjustment lag, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the coating thickness at the detection position before drying can predict whether the coating thickness is qualified in advance, and can make an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop to better treat the coating The coating thickness control of the first coating area and the second coating area to be coated can achieve the purpose of the coating thickness consistency of the first coating area of the substrate and the coating thickness of the second coating area.

In the second aspect, the embodiment of the present application provides a coating quality detection system, including a distinction identification device and a control device; the area identification device is configured to determine whether the detection position belongs to the first coating area of the substrate or the second coating area area, and obtain the first actual coating length of the first coating area along the transmission direction of the substrate and the second actual coating length of the second coating area along the transmission direction of the substrate according to the judgment result. Cloth length, wherein, the coating thickness of the first coating area is greater than the coating thickness of the second coating area; the control device is configured to according to the first actual coating length and the second The actual coating length controls the action of the coating device to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range.

In the above technical solution, the control device controls the action of the coating device according to the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area, so as to The coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, so that the coating of the first coating area and the second coating area The length meets the production requirements and improves the coating quality.

In some embodiments of the second aspect of the present application, the coating quality detection system further includes a surface density detection device configured to detect the actual coating surface density at the detection position.

In the above technical solution, the areal density detection device is used to detect the actual coating areal density at the detection position, and feed back the actual areal density signal to the control device to control the coating device to adjust the areal density and the area density of the first coating area to be coated. The coating area density of the second coating area to be coated, so that the coating area density of the first coating area and the second coating area meet the production requirements, ensure the flatness of the coating, and improve the coating quality.

In some embodiments of the first aspect of the present application, the areal density detection device includes a first detection part and a second detection part; the first detection part is arranged at the detection position before the coating is dried The coating area density at the detection position, and the second detection member is configured to detect the coating area density at the detection position after the coating at the detection position is dried.

In the above technical solution, the first detection part is used to detect the coating area density of the detection position before the coating at the detection position is dried, and the second detection part is used to detect the coating surface density of the detection position after the coating at the detection position is dried, The control device controls the action of the coating device according to the surface density signals detected by the first detection part and the second detection part, so that the coating surface density of the substrate can be adjusted twice to further improve the coating quality. If only the coating surface density before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating surface density after drying is controlled, from the coating position to the drying process There is a certain distance between the positions, so that the adjustment has a hysteresis, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the surface density of the detection position before drying can predict whether the coating surface density is qualified in advance, and can make an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop to better treat the coating The coating area density control of the first coating area and the second coating area to be coated, to achieve the consistency of the coating area density of the first coating area of the substrate and the coating area density of the second coating area the goal of.

In some embodiments of the first aspect of the present application, the coating quality detection system further includes a thickness detection device configured to detect the actual coating thickness at the detection position.

In the above technical solution, the thickness detection device is used to detect the actual coating thickness at the detection position, and feed back the actual thickness signal to the control device to control the coating device to adjust the coating thickness of the first coating area to be coated and the coating thickness to be coated. The coating thickness of the second coating area of the cloth is adjusted so that the coating thicknesses of the first coating area and the second coating area both meet production requirements and improve the coating quality.

In some embodiments of the first aspect of the present application, the thickness detection device includes a third detection part and a fourth detection part;

The third detection part is configured to detect the coating thickness at the detection position before the coating at the detection position is dried, and the fourth detection part is configured to detect the coating thickness at the detection position after the coating is dried. The coating surface thickness at the detection position.

In the above technical solution, the third detection part is used to detect the coating thickness at the detection position before the coating at the detection position is dried, and the fourth detection part detects the coating thickness at the detection position after the coating at the detection position is dried, and the control device The action of the coating device is controlled according to the coating thickness signals detected by the third detection part and the fourth detection part, so that the coating thickness of the substrate can be adjusted twice to further improve the coating quality. If only the coating thickness before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating thickness after drying is controlled, there will be a difference from the coating position to the drying position. A certain distance makes the adjustment lag, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the coating thickness at the detection position before drying can predict whether the coating surface density is qualified in advance, and can perform an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop to better treat the coating. Coating thickness control of the first coating area of the cloth and the second coating area to be coated, to achieve the purpose of coating thickness consistency of the first coating area of the substrate and coating thickness of the second coating area .

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Figure 1 is a schematic structural view of a substrate coated with alternately thick and thin coatings provided in an embodiment of the present application;

Fig. 2 is the flowchart of the coating quality control method that some embodiments of the present application provide;

Figure 3 is a schematic structural view of a coating device provided in some embodiments of the present application;

Fig. 4 is the flowchart of the coating quality control method that some other embodiments of the present application provide;

Fig. 5 is the flow chart of the coating quality control method provided by some further embodiments of the present application;

Fig. 6 is the flow chart of the coating quality control method provided by other embodiments of the present application;

Fig. 7 is the flowchart of the coating quality control method that some embodiments of the present application provide;

Fig. 8 is the locus diagram of coating surface density detection in some embodiments of the present application;

Fig. 9 is a schematic diagram of the relative relationship between the first detection part and the second detection part and the drying mechanism.

Icons: 1-substrate; 1a-first coating area; 1b-second coating area; 1c-blank area; 2-coating; 3-transmission mechanism; 1000-coating device; 100-coating head ;10-upper mold; 20-lower mold; 30-middle mold; 40-first slurry channel; 41-first coating port; 50-second slurry channel; 51-second coating port; 60-regulator ;200-first feeding assembly; 300-second feeding assembly; 500-drying mechanism; 2000-coating quality inspection system; 2100-area density inspection device; 2110-first inspection piece; pieces; A-transmission direction of substrate; B-scanning track.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the application is used, or the orientation or positional relationship of this application. The orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of the application is usually placed when it is used, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must be Having a particular orientation, being constructed and operating in a particular orientation, and therefore not to be construed as limiting the application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

With the increasing market demand for lithium batteries, higher requirements are placed on the electrical performance and safety performance of batteries. In order to improve the electrical performance and safety performance of batteries, technicians seek improvements from multiple conveniences, among which , The quality of the coating process in the battery manufacturing process has an important impact on the quality of the electrode sheet forming of the battery.

The coating process of the pole piece of the electrode assembly of the battery with different forms will also be different, such as a square battery, the electrode assembly of the square battery has a straight area and a bending area connected to the two ends of the straight area, and the bending area is easy In order to improve the problem of lithium precipitation in the bending area, it is possible to reduce the thickness of the positive electrode active material layer of the positive electrode sheet in the bending area and/or increase the thickness of the negative electrode sheet in the bending area through the relatively flat area. The thickness of the negative electrode active material layer in the region, as shown in Figure 1, makes the positive electrode sheet and the negative electrode sheet form thick and thin coatings 2 alternately along the length direction of the substrate 1, and the larger coating thickness is defined as the first coating area 1a, the one with the smaller coating thickness is the second coating area 1b.

The inventors found that the thick and thin pole pieces have high requirements on the coating process, and it is very difficult to control the length of the thick-coated area and the length of the thin-coated area within the preset ranges, resulting in that after being wound into an electrode assembly The corresponding coated area is not in the preset position, resulting in poor battery performance.

Based on this, the embodiment of the present application provides a coating quality detection method, by detecting the first actual coating length of the coated first coating area (thick coating area) and the coated second coating area ( thin coating area), and adjust the coating length of the first coating area to be coated according to the first actual coating length, and adjust the second coating length to be coated according to the second actual coating length The coating length of the cloth area, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, so that the first coating area and the coating length of the second coating area meet the production requirements, improve the coating quality, and thus improve the forming quality of the pole piece.

As shown in Figure 2, some embodiments of the present application provide a coating quality detection method, including:

Step S100, judging whether the detection position belongs to the first coating area or the second coating area of the substrate 1, and the coating thickness of the first coating area is greater than the coating thickness of the second coating area;

Step S200, obtaining the first actual coating length of the first coating area along the transmission direction A of the substrate and the second actual coating length of the second coating area along the transmission direction A of the substrate according to the judgment result;

Step S300, adjusting the coating length of the first coating area to be coated according to the first actual coating length, adjusting the coating length of the second coating area to be coated according to the second actual coating length, so as to The coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range.

Not only the coating thickness of the first coating area and the second coating area are different, but also the preset coating length of the first coating area and the preset coating length of the second coating area may be different, then in step S300 " Controlling the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range" means that the coating of the first coating area to be coated The length and the coating length of the second coating area to be coated are controlled within their respective preset ranges, the coating length of the first coating area is preset and the coating length of the second coating area is preset The range does not overlap, the minimum value of the preset range of the coating length of the first coating area can be greater than the maximum value of the preset range of the coating length of the second coating area, or the coating of the second coating area The minimum value of the preset range of lengths may be greater than the maximum value of the preset range of coating lengths of the first coating area.

In step S100, the detection position is part or all of one of the coated first coating area and the coated second coating area. The detection position may be a certain point position or a certain partial area in the coated first coating area, or the detection position may be a certain point position or a certain partial area in the coated second coating area.

In step S200, "obtain the first actual coating length of the first coating area along the transmission direction A of the substrate and the second actual coating length of the second coating area along the transmission direction A of the substrate according to the judgment result" Means, the judgment result refers to the judging structure in the step S100, whether the detection position belongs to the first coating area or the second coating area, if it is judged that the detection position belongs to the first coating area in the step S100, then the coating length of the detection position is is the first actual coating length of the coated first coating area, the first actual coating length should be compared with the preset range of the coating length of the first coating area, if the first actual coating length does not belong to the first If the coating length of a coating area is within the preset range, it is necessary to adjust the coating length of the first coating area to be coated so that the coating length of the first coating area to be coated is controlled at the preset range. If it is judged that the detection position belongs to the second coating area in step S100, then the coating length of the detection position is the second actual coating length of the second coating area, and the second actual coating length should be the same as that of the second coating area. Compared with the preset range of the coating length of the second coating area, if the second actual coating length does not belong to the preset range of the coating length of the second coating area, then the second coating area to be coated needs to be adjusted. Coating length, so that the coating length of the second coating area to be coated is controlled within a preset range.

Generally, the coating 2 is coated on the substrate 1 by the coating device 1000, the position of the coating device 1000 is fixed, and the substrate 1 is driven by the transmission mechanism 3 to drive relative to the coating device 1000. During the transmission of the substrate 1, The coating device 1000 applies the coating layer 2 to the surface of the substrate 1 .

The adjustment of the coating length can be realized by the coating device 1000 . As shown in FIG. 3 , a schematic structural view of a coating device is shown in FIG. 3 . Coating equipment comprises coating head 100, and coating head 100 comprises upper die 10, middle die 30 and lower die 20, upper die 10 and middle die 30, forms between the lower surface of upper die 10 and the upper surface of middle die 30 The first slurry channel 40, the first slurry channel 40 has a first coating port 41, the second slurry channel 50 is formed between the lower surface of the middle mold 30 and the upper surface of the lower mold 20, the second slurry channel 50 has The second paint port 51 .

The coating equipment includes a first feed assembly 200 for providing slurry to the first slurry passage 40 and a second feed assembly 300 for providing slurry to the second slurry passage 50, the first slurry The slurry in the channel 40 can be extruded through the first coating port to be coated on the substrate 1, and the slurry in the second slurry channel 50 can be extruded through the second coating port to be coated on the substrate 1, and the first coating port When both the first coating port and the second coating port extrude the slurry, the coating head 100 can coat the two-layer coating 2 on the substrate 1 to realize double-layer coating, and one of the first coating port and the second coating port extrudes When using slurry, the coating head 100 can coat a layer of coating 2 on the substrate 1 to achieve single-layer coating.

The coating head 100 also includes an adjustment member 60, the upper mold 10 and/or the lower mold 20 are movably provided with an adjustment member 60, and when the adjustment member 60 is arranged on the upper mold 10, the adjustment member 60 is used to adjust the first slurry passage The flow rate of 40, when the adjusting member 60 is arranged on the lower die 20, the adjusting member 60 is used to adjust the flow rate of the second slurry channel 50, thereby adjusting the thickness of the slurry extruded from the first coating port and the second coating port, Thus, the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are adjusted.

When the distance of the substrate 1 relative to the transmission of the coating head 100 is within the preset range of the coating length of the first coating area and the coating length of the second coating area, by timely adjusting the coating of the coating head 100 thickness, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are within a preset range.

Obtain the first actual coating length of the first coating area that has been coated and the second actual coating length of the second coating area that has been coated, and combine the first actual coating length and the preliminary coating length of the first coating area Set the coating length comparison, if the first actual coating length does not meet the preset coating length of the first coating area, it is necessary to adjust the coating length of the uncoated first coating area, and the second The actual coating length is compared with the preset coating length of the second coating area. If the second actual coating length does not meet the preset coating length of the second coating area, it is necessary to apply the second coating that has not been coated. The coating length of the cloth area is adjusted so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, so that the first coating The coating lengths of the cloth area and the second coating area both meet production requirements and improve coating quality.

Please refer to FIG. 4. In some embodiments, the first actual coating length of the first coating area along the transmission direction A of the substrate and the length of the second coating area along the transmission direction A of the substrate are obtained according to the judgment result. Second actual coat length, including:

Step S210, obtaining the first actual coating length, including:

Obtain the horizontal coordinates of the detection position along the transmission direction A of the substrate;

Based on the horizontal coordinates of the detection position, the first actual coating length L _n is obtained, where L _n =Σ(y _n+1 -y _n ), and y _n+1 represents the n+1th coating position in the detection position The horizontal coordinate of , y _n is the horizontal coordinate of the nth coating position in the detection position, and n is a natural number greater than or equal to 0;

Step S220, obtaining the second actual coating length, including:

Obtain the horizontal coordinates of the detection position along the transmission direction A of the substrate;

Based on the horizontal coordinates of the detection position, the second actual coating length H _n is obtained, wherein, H _n =Σ(h _n+1 -h _n ), h _n+1 represents the n+1th coating position in the detection position , h _n is the horizontal coordinate of the nth coating position among the detection positions, and n is a natural number greater than or equal to 0.

Among them, "obtaining the first actual coating length" is performed when the detection position belongs to the first coating area, and "acquiring the second actual coating length" is performed when the detection position belongs to the second coating area of.

The horizontal coordinate is the coordinate of the detection position along the conveying direction of the substrate 1 .

Obtain the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area, both of which are implemented in an accumulative manner, and continuously detect the coated first The horizontal coordinates of the coated area and the second coated area, and sequentially accumulate the horizontal coordinate difference between adjacent positions until the last horizontal coordinate of the coated first coated area and the coated second The last horizontal coordinate of the coating area to obtain the first actual coating length and the second actual coating length, so that the detection of the actual coating length is more accurate, so that the first coating area to be coated and the second coating area to be coated The coating length of the second coating area can be adjusted more accurately, so that the coating quality is better.

As shown in FIG. 5 , in some embodiments, the first actual coating length of the first coating area along the transmission direction A of the substrate and the first actual coating length of the second coating area along the transmission direction A of the substrate are obtained according to the judgment result. 2. Actual coating length, including:

Step S230, obtaining the first actual coating length, including:

Obtaining the coating start transverse coordinate _ystart of the detection position along the transmission direction A of the substrate and obtaining the coating end transverse coordinate _yend of the detection position along the transmission direction A of the substrate, the first actual coating Length L _n = y _end - y _start ;

Step S240, obtaining the second actual coating length, including:

Obtain the coating start transverse coordinate _hstart of the detection position along the transmission direction A of the substrate and obtain the coating _end transverse coordinate hend of the detection position along the transmission direction A of the substrate, the second actual coating length _Hn = _hend -h _start .

Since the detection position is the coated first coating area or the coated second coating area, along the transmission direction A of the substrate, the detection position has a coating start position and a coating end position, along The transmission direction A of the substrate, the difference between the coating start position of the detection position and the coating end position is the coating length of the detection position.

The first actual coating length is obtained by obtaining the difference between the coating start abscissa and the coating end abscissa in the first coating area, and the second actual coating length is obtained by obtaining the coating start in the second coating area The difference between the starting horizontal coordinate and the coating end horizontal coordinate is obtained. The acquisition method is simple and convenient, and the number of feedbacks is less, which improves the detection efficiency.

As shown in Figure 6, in some embodiments, judging whether the detection position belongs to the first coating area or the second coating area of the substrate 1 includes: judging that the detection position belongs to the first coating area according to the coating thickness of the detection position is also the second coated area;

Coating quality inspection methods also include:

Step S400, obtaining the first actual coating thickness of the first coating area and the second actual coating thickness of the second coating area according to the judgment result;

Step S500, adjusting the coating thickness of the first coating area to be coated according to the first actual coating thickness, and adjusting the coating thickness of the second coating area to be coated according to the second actual coating thickness, so as to The coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range.

In step S500, "controlling the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated within a preset range" means that the first coating area to be coated The coating thickness of the area and the coating thickness of the second coating area to be coated are controlled within their respective preset ranges, and the coating thickness of the first coating area and the coating thickness of the second coating area The preset thickness ranges do not overlap, and the minimum value of the preset range of coating thickness in the first coating area is greater than the maximum value of the preset range of coating thickness in the second coating area.

It should be noted that the "preset range" in step S300 and the "preset range" in step S500 are different concepts, the coating length represented by the "preset range" in step S300, and the "preset range" in step S500 The coating thickness indicated, the measurement unit of coating length can be meter, and the measurement unit of coating thickness can be micron.

Adjusting the coating thickness of the first coating area to be coated and adjusting the coating thickness of the second coating area to be coated can be realized by adjusting the coating flow rate of the coating head 100 .

Obtain the first actual coating thickness of the first coating area that has been coated and the second actual coating thickness of the second coating area that has been coated, and the first actual coating thickness and the preliminary coating thickness of the first coating area Set the coating thickness comparison, if the first actual coating thickness does not meet the preset coating thickness of the first coating area, then it is necessary to adjust the coating length of the uncoated first coating area, and the second The actual coating thickness is compared with the preset coating thickness of the second coating area. If the second actual coating thickness does not meet the preset coating thickness of the second coating area, it is necessary to apply the second coating that has not been coated. The coating thickness of the cloth area is adjusted so that the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range, so that the first coating The coating thicknesses of the cloth area and the second coating area both meet the production requirements and improve the coating quality.

Please continue to refer to Figure 6, in some embodiments, the coating quality detection method also includes:

Step S600, obtaining the first actual coating area density of the first coating area and the second actual coating area density of the second coating area according to the judgment result;

Step S700, adjusting the coating area density of the first coating area to be coated according to the first actual coating area density, and adjusting the coating area density of the second coating area to be coated according to the second actual coating area density , so as to control the coating area density of the first coating area to be coated and the coating area density of the second coating area to be coated within a preset range.

Coating area density is the flatness index of reaction coating 2, and the flatness of first coating area and the second coating area are different, therefore, the area density of the first coating area and the area density of the second coating area are different. Same, the preset range of the coating areal density of the first coating area and the preset range of the coating areal density of the second coating area do not overlap, the minimum of the preset range of the coating areal density of the first coating area The value is greater than the maximum value of the predetermined range of the coating areal density of the second coating area. The unit of measure for the coated areal density may be milligrams.

In step S700, "controlling the coating area density of the first coating area to be coated and the coating area density of the second coating area to be coated within a preset range" means that the first coating area to be coated The coating area density of the coating area and the coating area density of the second coating area to be coated are controlled within their respective preset ranges, and the coating area density of the first coating area is within the preset range and the second coating area. The predetermined ranges of the coated areal densities of the cloth regions may be the same or different.

In addition, the "preset range" in step S300, the "preset range" in step S500 and the "preset range" in step S700 are different concepts. The coating length represented by the "preset range" in step S300, step The coating thickness represented by the "preset range" in S500, and the coating thickness represented by the "preset range" in step S700.

Adjusting the coating area density of the first coating area to be coated and adjusting the coating area density of the second coating area to be coated can be realized by adjusting the coating thickness of the coating head 100 .

Obtain the first actual coating area density of the first coating area that has been coated and the second actual coating area density of the second coating area that has been coated, and combine the first actual coating area density and the first coating area density The preset coating area density comparison of the area, if the first actual coating area density does not meet the preset coating area density of the first coating area, then it is necessary to compare the coating area of the uncoated first coating area The density is adjusted, and the second actual coating area density is compared with the preset coating area density of the second coating area. If the second actual coating area density does not meet the preset coating area density of the second coating area, Then it is necessary to adjust the coating area density of the uncoated second coating area so that the coating area density of the first coating area to be coated and the coating of the second coating area to be coated The areal density is controlled within the preset range, so that the coating areal density of the first coating area and the second coating area both meet the production requirements, ensure the flatness of the coating, and improve the coating quality.

As shown in Figure 7, in some embodiments, step S610, obtaining the first actual coating surface density of the first coating area includes: obtaining the coating surface density of the detection position before the coating layer 2 at the detection position is dried and obtain the coating area density at the detection position after the coating 2 at the detection position is dried;

Step S620, obtaining the second actual coating area density of the second coating area, including: obtaining the coating area density of the second coating area and the coating area 2 drying at the detection position before drying the coating 2 at the detection position. After drying, obtain the coating area density at the detection position.

In both step S610 and step S620, the coating surface density at the detection position before drying is detected first, and then the coating surface density at the detection position after drying is detected.

By obtaining the surface density before drying and the surface density after drying at the detection position, the coating surface density of the detection position can be checked twice before drying and after drying, so that the first coating to be coated can be The cloth area and the second coating area are adjusted twice to further improve the coating quality. If only the coating surface density before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating surface density after drying is controlled, from the coating position to the drying process There is a certain distance between the positions, so that the adjustment has a hysteresis, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the area density of the detection position before drying can predict whether the area density is qualified in advance, and can perform an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop, so as to better treat the first coating. The coating area density control of the first coating area and the second coating area to be coated achieves the uniformity of the coating area density of the first coating area of the substrate 1 and the coating area density of the second coating area Purpose.

In some embodiments, step S410, obtaining the first actual coating thickness of the first coating area includes: obtaining the coating thickness at the detection position and the coating 2 at the detection position before drying the coating 2 at the detection position Obtain the coating thickness at the detection position after drying;

Step S420, obtaining the second actual coating thickness of the second coating area, including: obtaining the coating thickness at the detection position before the coating 2 at the detection position is dried and obtaining the detection position after the coating 2 at the detection position is dried coating thickness.

In both step S410 and step S420, the coating thickness at the detection position before drying is obtained first, and then the coating thickness at the detection position after drying is obtained.

By obtaining the surface density of the detection position before drying and the coating thickness after drying, the coating thickness of the detection position can be detected twice before drying and after drying, and the first coating area to be coated can be obtained Two thickness adjustments are performed with the second coating area to further improve the coating quality. If only the coating thickness before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating thickness after drying is controlled, there will be a difference from the coating position to the drying position. A certain distance makes the adjustment lag, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the coating thickness at the detection position before drying can predict whether the coating thickness is qualified in advance, and can make an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop to better treat the coating The coating thickness control of the first coating area and the second coating area to be coated can achieve the purpose of the coating thickness consistency of the first coating area of the substrate 1 and the coating thickness of the second coating area .

As shown in Figure 7, the embodiment of the present application provides a coating quality detection method, first judge whether the detection position belongs to the first coating area or the second coating area, if the judgment result, the detection position belongs to the first coating area, then Acquiring the first actual coating length of the first coating area, adjusting the coating length of the first coating area to be coated according to the first actual coating length, so that the coating of the first coating area to be coated The length is controlled within a preset range. The first actual coating length L _n can be obtained based on the horizontal coordinates of the detection position, where L _n =Σ(y _n+1 -y _n ), and y _n+1 represents the n+1th coating in the detection position The horizontal coordinate of the cloth position, y _n is the horizontal coordinate of the nth coating position among the detection positions, and n is a natural number greater than or equal to 0. The coating quality detection method also includes obtaining the first actual coating thickness of the first coating area, and adjusting the coating thickness of the first coating area to be coated according to the first actual coating thickness, so that the first coating area to be coated The coating thickness of a coating area is controlled within a preset range. Acquiring the first actual coating thickness includes detecting the coating thickness at the detection position before drying at the detection position and detecting the coating thickness at the detection position after drying at the detection position. The coating quality detection method also includes obtaining the first actual coating area density of the first coating area, adjusting the coating area density of the first coating area to be coated according to the first actual coating area density, so as to The coating surface density of the first coating area of the cloth is controlled within a preset range. Acquiring the first actual coating area density includes detecting the coating area density at the detection position before drying at the detection position and detecting the coating area density at the detection position after drying at the detection position.

If the judgment result detection position belongs to the second coating area, then obtain the second actual coating length of the second coating area, adjust the coating length of the second coating area to be coated according to the second actual coating length, to The coating length of the second coating area to be coated is controlled within a preset range. The second actual coating length H _n may be obtained based on the horizontal coordinate of the detection position, where H _n =Σ(h _n+1 -h _n ), h _n+1 represents the n+1th coating in the detection position The horizontal coordinate of the cloth position, hn is the horizontal coordinate of the nth coating position among the detection positions, and n is a natural number greater than or equal to 0. The coating quality detection method also includes obtaining the second actual coating thickness of the second coating area, adjusting the coating thickness of the second coating area to be coated according to the second actual coating thickness, so as to divide the second coating area to be coated The coating thickness of the second coating area is controlled within a preset range. Acquiring the second actual coating thickness includes detecting the coating thickness at the detection position before drying at the detection position and detecting the coating thickness at the detection position after drying at the detection position. The coating quality detection method also includes obtaining the second actual coating area density of the second coating area, adjusting the coating area density of the second coating area to be coated according to the second actual coating area density, so as to The coating surface density of the second coating area of the cloth is controlled within a preset range. Acquiring the second actual coating area density includes detecting the coating area density at the detection position before drying at the detection position and detecting the coating area density at the detection position after drying at the detection position.

The embodiment of the present application also provides a coating quality detection system 2000 (shown in FIG. 9 ), the coating quality detection system 2000 includes a distinguishing identification device (not shown in the figure) and a control device (not shown in the figure); The area recognition device is configured to judge whether the detection position belongs to the first coating area or the second coating area of the substrate 1, and obtain the first actual coating length of the first coating area along the driving direction A of the substrate according to the judgment result and the second actual coating length of the second coating area along the transmission direction A of the substrate, wherein the coating thickness of the first coating area is greater than the coating thickness of the second coating area; the control device is controlled by It is configured to control the action of the coating device 1000 according to the first actual coating length and the second actual coating length, so as to combine the coating length of the first coating area to be coated and the coating length of the coating area to be coated. The coating length of the second coating area is controlled within a preset range.

The area recognition device feeds back the result of judging whether the detection position belongs to the first coating area or the second coating area and the actual coating length of the detection position to the control device. If the detection position belongs to the first coating area, it has been coated The coating length of the detection position is the first actual coating length, and the control device compares the first actual coating length with the preset range of the coating length of the first coating area, if the first actual coating length does not belong to the first coating length If the coating length of a coating area is within the preset range, the control device controls the action of the coating device 1000 to adjust the coating length of the first coating area to be coated. If the detection position belongs to the second coating area, the coating length of the coated detection position is the second actual coating length, and the control device compares the second actual coating length with the preset coating length of the second coating area. If the range is compared, if the second actual coating length does not belong to the preset range of the coating length of the second coating area, the control device controls the action of the coating device 1000 to adjust the thickness of the second coating area to be coated. Spread length. The area identifying means may be an encoder.

The control device controls the action of the coating device 1000 according to the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area, so that the coating to be coated The coating length of the first coating area and the coating length of the second coating area to be coated are controlled within the preset range, so that the coating lengths of the first coating area and the second coating area meet the requirements of production Demand, improve coating quality.

In some embodiments, the coating quality detection system 2000 further includes an areal density detection device 2100, and the areal density detection device 2100 is configured to detect the actual coating areal density at the detection position.

The areal density detection device 2100 can be a laser scanning head, which detects the transverse areal density and longitudinal areal density of the position by continuous scanning, and feeds back the transverse areal density signal and the longitudinal areal density signal to the control device, and the control device judges the transverse areal density of the detection position. Whether the density and the longitudinal area density belong to the preset range of the coating area density of the first coating area or the preset range of the coating area density of the second coating area, thereby performing closed-loop control on the coating device 1000, so that the detection position The coating surface density meets the coating requirements.

As shown in Figure 8, the coating 2 is coated with a partial area in the width direction of the substrate 1, and there are blank areas 1c not coated with the coating 2 on both sides along the width direction of the substrate 1, and the surface density detection device 2100 Scan along the scanning track B in Fig. 8 to obtain the transverse areal density, longitudinal areal density and blank area 1c areal density, wherein, transverse coating areal density = transverse areal density - blank area 1c areal density, longitudinal coating areal density = Longitudinal area density - area density of blank area 1c. The transverse direction is consistent with the transmission direction A of the substrate, and the longitudinal direction is consistent with the width direction of the substrate 1 .

The area density detection device 2100 is used to detect the actual coating area density of the detection position, and feed back the actual area density signal to the control device to control the coating device 1000 to adjust the area density of the first coating area to be coated and the area density to be coated. The coating area density of the second coating area is to make the coating area density of the first coating area and the second coating area meet the production requirements, ensure the flatness of the coating, and improve the coating quality.

As shown in FIG. 9 , in some embodiments, the coating device 1000 includes a drying mechanism 500 for drying the coating 2 . Drying may result in inconsistent coating surface density.

In some embodiments, the areal density detection device 2100 includes a first detection part 2110 and a second detection part 2120; the first detection part 2110 is configured at the detection position before the coating 2 is dried to detect the coating surface density at the detection position, The second detection part 2120 is configured to detect the coating area density at the detection position after the coating 2 at the detection position is dried.

Both the first detection part 2110 and the second detection part 2120 can be scanning heads, the first detection part 2110 is arranged upstream of the drying mechanism 500 , and the second detection part 2120 is arranged downstream of the drying mechanism 500 .

The first detection part 2110 scans and measures the detection position, and feeds back the detected coating surface density signal of the detection position to the control device; the control device system is based on the detection position fed back by the first detection part 2110 before drying the coated surface Density information, analyze the horizontal surface density distribution and vertical surface density distribution of the detection position before drying, and make corresponding judgments, and control the coating device 1000 to perform closed-loop control on the horizontal surface density and vertical surface density, so that the surface density before drying Coating surface density meets coating requirements.

After the coating 2 at the detection position passes through the drying mechanism 500, the second detection part 2120 scans the detection position to measure the coating surface density of the detection position after drying, and calculates the coating surface density of the detection position after drying The data is fed back to the control device; the control device analyzes the horizontal surface density distribution and the vertical surface density distribution of the detection position after drying according to the feedback data, and makes a corresponding judgment. Closed-loop control, so that the coating surface density after drying by the detection device meets the coating requirements. In actual production, the final coating area to be coated and the second coating area to be coated are dried. The cloth surface density is adjusted to the preset range.

The first detection part 2110 is used to detect the coating surface density of the detection position before the coating 2 at the detection position is dried, and the second detection part 2120 detects the coating surface density of the detection position after the coating 2 of the detection position is dried, and controls The device controls the operation of the coating device 1000 according to the surface density signals detected by the first detection part 2110 and the second detection part 2120, so that the coating surface density of the substrate 1 can be adjusted twice to further improve the coating quality. If only the coating surface density before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating surface density after drying is controlled, from the coating position to the drying process There is a certain distance between the positions, so that the adjustment has a hysteresis, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the surface density of the detection position before drying can predict whether the coating surface density is qualified in advance, and can make an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop to better treat the coating The coating surface density control of the first coating area and the second coating area to be coated, to achieve the consistency of the coating area density of the first coating area of the substrate 1 and the coating surface of the second coating area density purpose.

In some embodiments, the coating quality detection system 2000 further includes a thickness detection device (not shown in the figure), which is configured to detect the actual coating thickness at the detection position.

The thickness detection device may include a thickness sensor, by continuously detecting the coating thickness at the detection position, and feeding back the coating thickness data at the detection position to the control device, the control device judges whether the coating thickness at the detection position belongs to the coating thickness of the first coating area. The preset range of the cloth thickness or the preset range of the coating thickness of the second coating area, so that the coating device 1000 is closed-loop controlled, so that the coating thickness of the first coating area and the second coating area meet Production coating needs, improve coating quality.

The thickness detection device may be provided corresponding to the surface density detection device 2100 . In the embodiment where it is judged whether the detection device belongs to the first coating area or the second coating area by the coating thickness, the thickness detection device can be used as the area identification device.

In some embodiments, the thickness detection device includes a third detection part and a fourth detection part; the third detection part is configured to detect the coating thickness at the detection position before the coating 2 at the detection position is dried, and the fourth detection part is configured It is to detect the thickness of the coating surface at the detection position after the coating 2 at the detection position is dried.

The third detection part and the fourth detection part can be thickness sensors, the third detection part scans and measures the detection position, and feeds back the coating thickness signal of the detected detection position to the control device; the control device system according to the third detection part Feedback the coating thickness information of the detection position before drying, analyze the coating thickness of the detection position before drying, and make corresponding judgments, and control the coating device 1000 to the first coating to be coated by the coating device 1000 The area and the second coating area to be coated are adjusted so that the coating thickness before drying meets the coating requirements.

The setting position of the third detection part may be the same as that of the first detection part 2110 , and the setting position of the fourth detection part may be the same as that of the second detection part 2120 .

After the coating 2 at the detection position passes through the drying mechanism 500, the fourth detection part scans the detection position to measure the coating thickness of the detection position after drying, and feeds back the coating thickness data of the detection position after drying to Control device; The control device analyzes the coating thickness of the detection position after drying according to the feedback data, and makes a corresponding judgment, the coating device 1000 is the first coating area to be coated and the second coating area to be coated The coating thickness of the area is adjusted in a closed loop, so that the coating thickness of the first coating area to be coated and the second coating area to be coated meet the coating requirements. In actual production, the final coating to be coated The coating thickness after drying of the first coating area and the second coating area to be coated is adjusted to a preset range.

The third detection part is used to detect the coating thickness at the detection position before the coating 2 at the detection position is dried, and the fourth detection part detects the coating thickness at the detection position after the coating 2 at the detection position is dried, and the control device is based on the third The coating thickness signals detected by the detecting element and the fourth detecting element control the operation of the coating device 1000 so that the coating thickness of the substrate 1 can be adjusted twice to further improve the coating quality. If only the coating thickness before drying is controlled, it may become uneven after the drying process, which does not meet the coating requirements; if only the coating thickness after drying is controlled, there will be a difference from the coating position to the drying position. A certain distance makes the adjustment lag, and the adjustment is not timely, resulting in the controllable parameters being too late to adjust. Detecting the coating thickness at the detection position before drying can predict whether the coating surface density is qualified in advance, and can perform an adjustment once, and perform a second inspection and correction after drying, and perform a second adjustment to correct the closed loop to better treat the coating. Coating thickness control of the first coating area of the cloth and the second coating area to be coated to achieve the uniformity of the coating thickness of the first coating area of the substrate 1 and the coating thickness of the second coating area Purpose.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (12)

1. A coating quality detection method, comprising:

   Judging whether the detection position belongs to the first coating area or the second coating area of the substrate, the coating thickness of the first coating area is greater than the coating thickness of the second coating area;

   Obtaining a first actual coating length of the first coating area along the driving direction of the substrate and a second actual coating length of the second coating area along the driving direction of the substrate according to the judgment result;

   Adjust the coating length of the first coating area to be coated according to the first actual coating length, adjust the coating length of the second coating area to be coated according to the second actual coating length, so as to The coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range.
2. The coating quality detection method according to claim 1, wherein the first actual coating length and the second coating length of the first coating area along the driving direction of the substrate are obtained according to the judgment result. The second actual coating length of the area along the transmission direction of the substrate includes: obtaining the first actual coating length, including:

   Obtaining the transverse coordinates of the detection position along the transmission direction of the substrate;

   Based on the horizontal coordinates of the detection position, the first actual coating length L _n is obtained, wherein, L _n =Σ(y _n+1 -y _n ), yn+1 represents the n+th in the detection position The horizontal coordinate of one coating position, yn is the horizontal coordinate of the nth coating position in the detection position, and n is a natural number greater than or equal to 0;

   Obtaining the second actual coating length includes:

   Obtaining the transverse coordinates of the detection position along the transmission direction of the substrate;

   Based on the horizontal coordinates of the detection position, the second actual coating length H _n is obtained, wherein, H _n =Σ(h _n+1 -h _n ), h _n+1 represents the nth in the detection position +1 horizontal coordinate of the coating position, h _n is the horizontal coordinate of the nth coating position in the detection position, and n is a natural number greater than or equal to 0.
3. The coating quality detection method according to claim 1, wherein the first actual coating length and the second coating length of the first coating area along the driving direction of the substrate are obtained according to the judgment result. The second actual coating length of the zone along the direction of travel of the substrate, comprising:

   Obtaining the first actual coating length includes:

   Obtaining the coating start transverse coordinate _ystart of the detection position along the transmission direction of the substrate and obtaining the coating end transverse coordinate _yend of the detection position along the transmission direction of the substrate, the first actual Coating length L _n = y _end - y _start ;

   Obtaining the second actual coating length includes:

   Obtaining the coating start transverse coordinate hstart of the detection position along the transmission direction of the substrate and obtaining the coating end transverse coordinate hend of the detection position along the transmission direction of the substrate, the _second actual Coating length H _n = h _end - h _start .
4. The coating quality detection method according to any one of claims 1-3, wherein the judging whether the detection position belongs to the first coating area or the second coating area of the substrate comprises: according to the coating of the detection position Determine whether the detection position belongs to the first coating area or the second coating area by cloth thickness;

   The coating quality detection method also includes:

   Acquiring the first actual coating thickness of the first coating area and the second actual coating thickness of the second coating area according to the judgment result;

   Adjust the coating thickness of the first coating area to be coated according to the first actual coating thickness, adjust the coating thickness of the second coating area to be coated according to the second actual coating thickness, so as to The coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range.
5. The coating quality detection method according to claim 4, wherein, the coating quality detection method further comprises:

   Acquiring the first actual coating area density of the first coating area and the second actual coating area density of the second coating area according to the judgment result;

   Adjust the coating area density of the first coating area to be coated according to the first actual coating area density, adjust the coating area of the second coating area to be coated according to the second actual coating area density Density, so as to control the coating area density of the first coating area to be coated and the coating area density of the second coating area to be coated within a preset range.
6. The coating quality detection method according to claim 5, wherein obtaining the first actual coating surface density of the first coating area comprises:

   Obtaining the coating area density at the detection position before the coating at the detection position is dried and obtaining the coating area density at the detection position after the coating at the detection position is dried;

   Acquiring the second actual coating area density of the second coating area, including:

   The coating area density at the detection position is acquired before the coating at the detection position is dried, and the coating area density at the detection position is acquired after the coating at the detection position is dried.
7. The coating quality detection method according to any one of claims 4-6, wherein obtaining the first actual coating thickness of the first coating area comprises:

   Obtaining the coating thickness at the detection position before drying the coating at the detection position and obtaining the coating thickness at the detection position after drying the coating at the detection position;

   Obtaining the second actual coating thickness of the second coating area includes:

   The coating thickness at the detection position is obtained before the coating at the detection position is dried, and the coating thickness at the detection position is obtained after the coating at the detection position is dried.
8. A coating quality inspection system, comprising:

   The area identification device is configured to determine whether the detection position belongs to the first coating area or the second coating area of the substrate, and obtain the first actual position of the first coating area along the driving direction of the substrate according to the judgment result. The coating length and the second actual coating length of the second coating area along the driving direction of the substrate, wherein the coating thickness of the first coating area is greater than the coating thickness of the second coating area cloth thickness;

   The control device is configured to control the action of the coating device according to the first actual coating length and the second actual coating length, so as to combine the coating length of the first coating area to be coated and the coating length to be coated The coating length of the second coating area of the cloth is controlled within a preset range.
9. The coating quality detection system according to claim 8, wherein the coating quality detection system further comprises a surface density detection device configured to detect the actual coating surface density at the detection position.
10. The coating quality detection system according to claim 9, wherein the areal density detection device comprises a first detection part and a second detection part;

    The first detection part is configured to detect the coating surface density at the detection position before the coating at the detection position is dried, and the second detection part is configured to detect the coating area density at the detection position after the coating at the detection position is dried. The coating area density at the detection position is detected.
11. The coating quality detection system according to any one of claims 8-10, wherein the coating quality detection system further comprises a thickness detection device configured to detect the actual coating at the detection position thickness.
12. The coating quality detection system according to claim 11, wherein the thickness detection device comprises a third detection part and a fourth detection part;

    The third detection part is configured to detect the coating thickness at the detection position before the coating at the detection position is dried, and the fourth detection part is configured to detect the coating thickness at the detection position after the coating is dried. The coating surface thickness at the detection position.

Images