KR102090043B1 - Drying control system of coating layer - Google Patents

Abstract

Embodiments of the present invention is a coating unit is coated with a transfer unit for transferring the first base material is formed on the coating layer, one or more drying zones arranged along the transfer direction, and disposed in each of the drying zone to dry the first base material A first facility including a first drying unit and a first control unit controlling the first drying unit to control a drying environment of the drying zone; And a drying room having a drying space for drying the second base material on which the coating layer is formed by applying a coating agent, a second drying unit disposed in the drying chamber to dry the second base material, and controlling a drying environment of the drying chamber. In order to include a second control unit including a second control unit for controlling the second drying unit and a stress measurement unit for measuring the stress of the coating layer on the second base; includes, the second control unit is the drying where the first base material is located Disclosed is a coating layer drying control system that controls a second drying unit so that a drying environment corresponding to a zone's drying environment is formed in the drying chamber.

Description

Coating layer drying control system {DRYING CONTROL SYSTEM OF COATING LAYER}

Embodiments of the present invention relates to a coating layer drying control system for controlling a drying environment for drying a substrate on which a coating layer is formed by applying a coating agent.

The electrode performance of the secondary battery capable of charging and discharging may be greatly affected by a drying environment such as temperature and humidity at which the solvent evaporates after coating the electrode slurry.

In general, the drying profile according to the drying time is optimized by evaluating the properties of the finished product after drying.

On the other hand, the defect inspection of the mass-produced electrode plate manufactured through the electrode plate drying mass production facility is performed through the completion of the drying process and observation of the electrode surface. When the defect is detected, the continuous mass production line is stopped and the defect is removed and dried. The process of adjusting the profile is required.

This adjustment process increases the process time and provides a problem of decreasing production efficiency.

Embodiments of the present invention provides a coating layer drying control system for predicting a change in stress of a coating layer according to a drying environment as close to the actual and controlling the drying environment.

However, the problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

An embodiment of the present invention is a coating unit is coated with a transfer unit for transferring the first base material is formed on the coating layer, at least one drying zone arranged in the transport direction, and each of the drying zone is disposed in each of the first base material A first facility including a first drying unit for drying and a first control unit for controlling the first drying unit to control a drying environment of the drying zone; And a drying room having a drying space for drying the second base material on which the coating layer is formed by applying a coating agent, a second drying unit disposed in the drying chamber to dry the second base material, and controlling a drying environment of the drying chamber. In order to include a second control unit including a second control unit for controlling the second drying unit and a stress measurement unit for measuring the stress of the coating layer on the second base; includes, the second control unit is the drying where the first base material is located Disclosed is a coating layer drying control system that controls a second drying unit so that a drying environment corresponding to a zone's drying environment is formed in the drying chamber.

In this embodiment, the first facility includes a first coating unit that applies a coating agent on a first base material before the coating layer is formed, and the second facility applies a coating agent on the second base material before the coating layer is formed. It includes a second coating unit to be applied, and may further include a coating agent supply unit for supplying a coating agent to the first coating unit and the second coating unit.

In the present embodiment, the coating agent supply unit includes a supply channel through which a coating agent is supplied, a first channel connecting the supply channel and the first coating unit, and a second channel connecting the supply channel and the second coating unit. It can contain.

In the present embodiment, the first facility includes a first drying environment information generating unit that measures the drying environment of the drying zone to generate first drying environment information, and the second facility includes a drying environment of the drying room. And a second drying environment information generating unit for measuring the second drying environment information by measuring the second drying unit so that the second drying environment information converges with the first drying environment information. Can be controlled.

In this embodiment, a drying profile storage unit for storing a drying profile for controlling the first drying unit according to the drying time, the first control unit to control the first drying unit based on the stored drying profile You can.

In the present embodiment, the second control unit may control the second drying unit based on the stored drying profile.

In this embodiment, the drying profile may be derived on the basis of the reference stress of the coating layer set in advance according to the drying time.

In the present embodiment, the correction information is generated by comparing the measurement stress of the coating layer on the second substrate measured by the stress measurement unit and the reference stress of the preset coating layer to generate correction information capable of correcting the drying profile. Further comprising; a first control unit may control the first drying unit based on the correction information of the drying profile.

In the present embodiment, the correction information generating unit may generate the correction information when a difference between a reference stress of the preset coating layer and a measurement stress of the coating layer on the second substrate is out of a predetermined range.

In the present embodiment, the correction information generating unit generates the correction information when the absolute value of the change rate of the measured stress of the coating layer on the second substrate is greater than the absolute value of the change rate of the reference stress of the preset coating layer. You can.

According to embodiments of the present invention, the second facility includes a second facility for drying a second base material having a coating layer and measuring stress of the coating layer, separately from the first facility for drying and mass-producing the first base material having a coating layer, Since the drying environment in can be synchronized with the drying environment in the first facility, the stress of the coating layer on the mass-produced first substrate can be predicted in close proximity to the actual.

In addition, according to an embodiment of the present invention, by comparing the measurement stress of the coating layer on the second base material and the reference stress of a preset coating layer, correction information capable of correcting the drying profile is generated, and based on the correction information, Since the drying environment in the facility can be controlled, it is possible to manufacture a substrate on which a coating layer of excellent quality is formed in consideration of the stress of an actual coating layer.

Of course, the scope of the embodiments of the present invention is not limited by these effects.

1 is a conceptual diagram schematically showing the configuration of a coating layer drying control system according to an embodiment of the present invention.
2 is a view showing a pattern of a coating layer region formed on a base material.
3 is a plan view and a side view for explaining an example of the positional relationship between the second substrate and the transfer unit shown in FIG.
4 is a view for explaining a phenomenon in which bending displacement occurs when the second base material on which the coating layer is formed is bent.
5 is a view showing an example of comparing the reference stress of the coating layer for generating the correction information and the measurement stress of the coating layer on the second substrate.
6 is a view showing another example of comparing the reference stress of the coating layer for generating the correction information and the measurement stress of the coating layer on the second substrate.
7 is a block diagram showing a control flow of the coating layer drying control system shown in FIG. 1.

The present invention will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the ordinary knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. On the other hand, the terms used in the description of the present invention are for describing the embodiments and are not intended to limit the present invention. In the description of the present invention, the singular form also includes the plural form unless otherwise specified in the phrase. In the description of the present invention, the description that one member is "on" another member includes not only the case where one member is in contact with the other member, but also another member between the two members. As used in the description of the present invention, "comprises" and / or "comprising" refers to the components, steps, operations and / or elements mentioned above, wherein one or more other components, steps, operations and / or The presence or addition of devices is not excluded. Terms such as first and second may be used to describe various components, but the components should not be limited by terms. The terms are used only to distinguish one component from other components.

The secondary battery capable of charging and discharging may be formed by storing the electrode assembly in an external container such as a metal can or sealing the flexible external member. At this time, the electrode assembly may be formed by winding a laminate with a separator interposed between the positive electrode plate and the negative electrode plate in a roll type, or by stacking the positive electrode plate and the negative electrode plate in sequence with the separator interposed therebetween. The electrode plates, such as the positive electrode plate and the negative electrode plate, may be formed by applying an active material in the form of a liquid or slurry on an electrode base material transferred in a continuous flow.

1 is a conceptual diagram schematically showing the configuration of a coating layer drying control system according to an embodiment of the present invention, and FIG. 2 is a view showing a pattern of a coating layer region formed on a base material. 3 is a plan view and a side view for explaining an example of the positional relationship between the second base material and the transfer unit shown in FIG. 1, and FIG. 4 illustrates a phenomenon in which bending displacement occurs when the second base material on which the coating layer is formed is bent. It is a drawing for. 5 is a view showing an example of comparing the reference stress of the coating layer for generating the correction information and the measurement stress of the coating layer on the second base, and FIG. 6 is a reference stress of the coating layer for generating the correction information and the measurement of the coating layer on the second base This diagram shows another example of comparing stresses. 7 is a block diagram showing a control flow of the coating layer drying control system shown in FIG. 1.

1 to 2, the coating layer drying control system 1000 considers the stress of the coating layer CL in drying the first base material P1 + CL on which the coating layer CL is formed by applying the coating agent C. It can be a system for controlling the drying environment.

For example, the first base material P1 may be a current collector such as aluminum or copper sheet, mesh, film, or foil, and the coating agent (C) may be a positive or negative electrode active material. Can be However, the first base material (P1) is a base material to be coated, and a material capable of coating the coating agent (C), which may be any material that needs drying.

The coating layer drying control system 1000 may include a first facility 100 and a second facility 200.

The first facility 100 is a facility for drying the first base material P1 + CL on which the coating layer CL is formed, the transfer unit 110, the drying zone 120, the first drying unit 130, and the first It may include a control unit 140.

The transfer unit 110 may transfer the first base material P1 + CL on which the coating agent CL is applied and the coating layer CL is formed. Here, the first base material (P1) is a coating layer (CL) is formed on the base material (M) withdrawn from the base material roll (R) wound so that it can be continuously supplied and after drying is completed, the base material on which the coating layer (CL) is formed ( M) may be a substrate formed by being divided into a plurality of pieces, or may be a plate-like member already divided into a plurality of pieces. In the description of the present invention, the first base material P1 is supplied as a base material M with a continuous flow for convenience of description, but it is assumed that it is a base material having a predetermined area that is a reference to be divided into a plurality of pieces on the base material M. And explain. The conveying unit 110 is a conveying means capable of conveying the first base material P1 + CL on which the coating layer CL is formed, for example, the first base materials P1, P1 withdrawn from the wound base material roll R. + CL) and may include a plurality of transport rollers 111 that can be transported. However, the conveying means is not limited to only the conveying roller, and any device can be used as the conveying means as long as the first substrates P1 and P1 + CL can be conveyed.

The drying zone 120 may be a space for drying the first base material P1 + CL on which the coating layer CL is formed on the first facility 100, and the first base material P1 + CL on which the coating layer CL is formed. One or more (120-1, 120-2, 120-n) may be arranged along the transport direction of. Each drying environment of the two drying zones 120 adjacent to each other may be the same as or different from each other. In addition, the drying environment of each drying zone 120 may be constant or change with time.

The first drying unit 130 is a device that allows a specific drying environment to be formed inside the drying zone 120 in order to dry the first base material P1 + CL on which the coating layer CL is formed, and each drying zone 120 ) Can be disposed inside each. The first drying unit 130 may include at least one of a hot air device for supplying hot gas, a humidifying device, and a light irradiation device for irradiating light such as infrared rays or ultraviolet rays. In this embodiment, the first drying unit 130 is shown in the drawing as a hot air device.

The first control unit 140 may control the first drying unit 130 to control the drying environment of the drying zone 120. The first control unit 140 may be implemented in various forms, such as a circuit board, an integrated circuit chip, a series of computer programs mounted on hardware, firmware, and software, which control the first drying unit 130 according to an embodiment.

The second facility 200 is a facility for drying the second base material (P2 + CL) having the coating agent (C) coated thereon and measuring the stress of the coating layer (CL) under drying, the drying chamber 210 , A second drying unit 220, a second control unit 230 and a stress measurement unit 240.

Here, the coating agent (C) applied to the second substrate (P2) may be a coating agent formed under substantially the same conditions as the coating agent (C) applied to the first substrate (P1). Here, the same conditions may be the same components and the same temperature and humidity conditions.

Here, the second base material P2 is a plate-shaped member, and is preferably formed of a material capable of reflecting light emitted from a light source, which will be described later, for measuring stress of the coating layer CL formed by being applied to the second base material P2. . For example, the second substrate P2 may include at least one of aluminum, copper deposited glass, silicon wafer, and SUS.

The drying chamber 210 is a structure that forms a space for drying the second base material (P2 + CL) on which the coating layer CL is formed, and can separate the drying space from the outside. The drying chamber 210 may be sealed to be isolated from the outside.

The second drying unit 220 is a device that allows a specific drying environment to be formed inside the drying chamber 210 in order to dry the second base material P2 + CL on which the coating layer CL is formed, inside the drying chamber 210. Can be deployed. The second drying unit 220 may include at least one of a hot air device that supplies high-temperature gas, a humidifying device, and a light irradiation device that irradiates light such as infrared light or ultraviolet light. In this embodiment, the second drying unit 220 is shown in the drawing as a hot air device.

The second control unit 230 may control the second drying unit 220 to control the drying environment of the drying chamber 210. The second control unit 230 may be implemented in various forms, such as a circuit board, an integrated circuit chip, a series of computer programs mounted on hardware, firmware, software, etc. that control the second drying unit 220 according to an embodiment.

The stress measurement unit 240 may measure the stress of the coating layer CL on the second base material P2 dried by the second drying unit 220.

The stress measurement unit 240 is reflected from the light source 241 for irradiating light on the second substrate (P2 + CL) on which the coating layer (CL) is formed, and the second substrate (P2 + CL) on which the coating layer (CL) is formed. It may include a light detection unit 242 for detecting light.

The second substrate (P2 + CL) on which the coating layer (CL) is formed, as shown in FIG. 4, bending occurs due to stress as drying progresses, and for this reason, the position of the light confirmed by the photodetector 242 Changes.

When a photodiode is used as the photodetector 242, the change in the position of the detected light appears as a change in voltage immediately, and the warpage to be obtained through the present invention is obtained by a correlation curve of a previously created change in voltage and a bending displacement value. Conversion to displacement and stress is possible.

The light detected by the photodetector 242 is irradiated from the light source 241, and a second substrate (P2 + CL, hereinafter referred to as 'second coating substrate') on which a coating layer CL for measuring bending displacement is formed ). In this case, light is not limited in its kind as long as it has excellent linearity, and a laser is more preferable in terms of stability.

On the other hand, the light irradiated from the light source 241 is preferably passed through an appropriate reflector 243 before reaching the second coating substrate (P2 + CL), the path of light irradiated by using the reflector 245 Can be easily changed, thereby improving the accuracy of the measurement.

On the other hand, the drying room 210 is preferably blocked from the outside in order to accurately observe the effect of drying environment variables such as temperature or humidity on the drying and bending displacement, and in this case, the light irradiated from the light source 241 will be reflected. It is preferable to form a window (not shown) in the part corresponding to the path so as to be possible.

The second control unit 230 is a drying environment corresponding to the drying environment of the drying zone 120 in which the first base material (P1 + CL, hereinafter referred to as 'first coating base material') on which the coating layer CL is formed is located. The second drying unit 220 may be controlled to be formed in the drying chamber 210. On the other hand, the first base material (P1) is a plurality of continuously transferred through the base material (M) withdrawn from the base material roll (R), the first base material (P1 + CL) formed with a coating layer by coating (C) is applied is the highest By entering the first drying zone (120-1) of the second drying zone (120-2) and then moving sequentially in the downstream direction to exit the lowest n-th drying zone (120-n) to dry Can be done. The second control unit 220 is a drying zone in which a specific first coating material (P1 + CL_a) entering the first drying zone 120-1 at a specific point in time among a plurality of first coating materials (P1 + CL) ( The second drying unit 220 may be controlled so that a drying environment corresponding to the drying environment of 120-1, 120-2, ..., 120-n) is formed in the drying chamber 210. Therefore, the second control unit 230 is the drying chamber (from the time when the specific first coating material (P1 + CL_a) enters the first drying zone (120-1) to the time of exiting the n-th drying zone (120-n) ( The drying environment of 210) is sequentially the same as the drying environment of the first drying zone 120-1, the second drying zone 120-2, ..., the nth drying zone 120-n. The second drying unit 220 is controlled to be formed. Accordingly, the stress measurement unit 240 measures the stress of the coating layer CL on the second coating substrate P2 + CL being dried in the same drying environment as the coating layer CL on the specific first coating substrate P1 + CL_a. Since it is possible to do so, it is possible to predict the current stress of the coating layer CL on the specific first coating substrate P1 + CL_a based on the measured measurement stress.

The first facility 100 may include a first coating unit 160 for applying a coating agent (C) on the first substrate (P1) before the coating layer (CL) is formed. A nozzle device capable of applying a coating agent (C) may be used as the first coating unit 160. On the other hand, the first coating unit 160, as shown in Figure 2, on the base material (M) withdrawn from the base material roll (R), the coating layer region (CL) arranged discontinuously with a constant pitch along its length direction ) May be formed, and a base material region M in which a coating layer is excluded may be formed between neighboring coating layer regions CL. Here, a portion of the base material on which the coating layer region CL is formed may be the first coating base region P1 + CL.

The second facility 200 may include a second coating unit 260 for applying the coating agent (C) on the second base (P2) before the coating layer (CL) is formed. A nozzle device capable of applying a coating agent (C) may be used as the second coating unit 260.

The second facility 200 is separated from the drying chamber 210 and may include a coating chamber 270 which is a structure forming a space for coating the coating agent (C). The coating chamber 270 may be sealed to be isolated from the outside. The second coating unit 260 may be disposed inside the coating chamber 270.

The second facility 200 may include a transfer unit 280 capable of transferring the second base material P from the coating chamber 270 to the drying chamber 210. The transfer unit 280 may be used as a means for transferring the second substrate P2, a manipulator, a transfer roller, a transfer line, or the like.

The transfer unit 280 may include a clamping unit 281 for clamping at least a portion of the second base material P and a transfer line 282 for transferring the clamping unit 281.

The clamping unit 281 may move up and down with respect to the transfer line 282 to be described later, and when descending, one end of the second substrate P2 through the contact portion 281a in the direction parallel to the width direction of the transfer line 282 It can be fixed to the transfer line (282).

The transfer line 282 may be implemented with, for example, a transfer belt or a plurality of chain portions continuously arranged, which are movable along the transfer direction. The transfer line 282 may support one end of the second base material P2 and allow the second base material P2 to be transported in a cantilever shape together with the clamping unit 281.

A plurality of clamping units 281 may be arranged along the transfer line 282. Thus, the second base material P2 clamped by the clamping unit 281 can be positioned at least one in the coating chamber 270 and at least one in the drying chamber 210.

Further, by allowing two or more clamping units 281 to be disposed in the coating chamber 270, the second subordinate substrate P2 is allowed to wait while the coating agent C is applied on the second substrate P2. You may.

In the second base material P2 located in the coating chamber 270, a specific first coating base material P1 + CL_a enters the first drying zone 120-1 and exits the nth drying zone 120-n. After the drying of the specific first coating substrate (P1 + CL_a) is completed, the drying chamber from the coating chamber 270 can be dried in the drying chamber 210 in correspondence with the specified first coating substrate (P1 + CL_a) again. It can be transferred to 210.

The coating layer drying control system 1000 may include a coating agent supply unit 300 that supplies a coating agent C to the first coating unit 160 and the second coating unit 260. That is, by supplying the coating agent (C) to the first coating unit 160 and the second coating unit 260 through the same coating agent (C) through the coating agent supply unit 300, the coating layer formed on the first substrate (P1) (CL) and the coating layer (CL) formed on the second base material (P2) can be formed on substantially the same conditions, so that the specific based on the measurement stress of the coating layer (CL) on the two coating materials (P2 + CL) The predicted accuracy of the current stress of the coating layer CL on the first coating substrate P1 + CL_a can be increased.

The coating agent supply unit 300 includes a supply channel 310 through which a coating agent (C) is supplied, a first channel 320 connecting the supply channel 310 and the first coating unit 160, and a supply channel 310. A second channel 330 connecting the second coating unit 260 may be included. That is, the coating agent (C) supplied through the supply channel 310 is the first coating unit 160 and the second coating through the first channel 320 and the second channel 330 on the same supply channel 310, respectively. It can be moved to the unit 260.

The first facility 100 may include a first drying environment information generating unit 150 that measures the drying environment of the drying zone 120 to generate first drying environment information.

The first drying environment information generating unit 150 may measure at least one of temperature, humidity, and illuminance inside the drying zone 120. The first drying environment information generating unit 150 may include at least one of a temperature sensor, a humidity sensor, and an illuminance sensor, and these sensors may be disposed inside each drying zone 120. The temperature, humidity, and / or illuminance measured inside each drying zone 120 may be generated as first drying environment information for each drying zone 120.

The second facility 200 may include a second drying environment information generating unit 250 that measures the drying environment of the drying chamber 210 and generates second drying environment information.

The second drying environment information generating unit 250 may measure at least one of temperature, humidity, and illuminance inside the drying chamber 210. The second drying environment information generating unit 250 may include at least one of a temperature sensor, a humidity sensor, and an illuminance sensor, and such a sensor may be disposed inside the drying chamber 210. The temperature, humidity, and / or roughness measured inside the drying chamber 210 may be generated as second drying environment information.

The second control unit 230 may control the second drying unit 220 so that the second drying environment information converges to the first drying environment information. In detail, the second control unit 230 allows the second drying unit 220 to converge the second drying environment information to the first drying environment information of the drying zone 120 in which the specific first coating substrate (P1 + CL_a) is located. ) Can be controlled. For example, if the temperature of the drying chamber 210 as the second drying environment information is lower than the temperature of the drying zone 120 in which the specific first coating substrate (P1 + CL_a) is located, the temperature of the drying chamber 210 is the corresponding drying The second drying unit 220 may be controlled to be formed at the same temperature as the zone 120. To this end, the coating layer drying control system 1000 may include a drying environment comparison unit 400 that compares the first drying environment information and the second drying environment information.

The coating layer drying control system 1000 may include a drying profile storage unit 500 that stores a drying profile for controlling the first drying unit 130 according to the drying time.

The drying profile may be a setting condition of a drying unit that is set based on the corresponding drying environment information or drying environment information according to the drying time based on a specific first coating material (P1 + CL_a).

The drying profile may be derived based on a reference stress of a preset coating layer according to the drying time as shown in FIGS. 5 and 6. On the other hand, the physical properties of the coating layer may change as it is dried, and such physical property changes can be estimated through stress changes of the coating layer. For example, when an excessive peak appears in the stress curve of the coating layer according to the drying time, there is a high probability that a crack has occurred on the coating layer, and such a peak may occur when drying is faster than an appropriate level. Therefore, the experimenter can derive the reference stress of the coating layer according to the drying time in advance through the experiment, in which the coating layer after drying can meet good product conditions.

The first control unit 140 may control the first drying unit 130 based on the drying profile stored in the drying profile storage unit 500.

The second control unit 230 may also control the second drying unit based on the drying profile stored in the drying profile storage unit 500 at least in the initial stage of the drying process. This is to enable drying of the second coating material (P2 + CL) in the same drying environment as that of the specific first coating material (P1 + CL).

The coating layer drying control system 1000 corrects the drying profile by comparing the measurement stress of the coating layer CL on the second substrate P2 measured by the stress measurement unit 240 with the reference stress of the preset coating layer CL. It may include a correction information generating unit 600 for generating the correction information.

Even if the first drying unit 130 and / or the second drying unit 220 are controlled according to the initial drying profile stored in the drying profile storage unit 500, the first base material P1 and the second base material P2 during drying are controlled. The stress of the formed coating layer CL may show a different pattern from the reference stress S _r of the preset coating layer CL. In this case, in order to improve the quality of the first coating substrate (P1 + CL), the stress of the coating layer (CL) of the first coating substrate (P1 + CL) converges to the reference stress (S _r ) of the preset coating layer (CL). It needs to be done.

The correction information may be information that can adjust factors such as temperature, humidity and / or roughness on the drying profile in terms of the drying environment. In addition, the reference information for generating the correction information may be a pre-derived algorithm that takes into account the stress tendency of the coating layer CL that changes depending on the drying environment through experiments or simulations.

The drying profile storage unit 500 may store a new drying profile reflecting the correction information, and drying of the first coating substrate located upstream of the specific first coating substrate (P1 + CL_a) may be dried according to the new drying profile. I can make it.

The first control unit 140 may control the first drying unit 130 based on the correction information of the drying profile.

The second control unit 230 may control the second drying unit 220 based on the correction information of the drying profile or the comparison information of the drying environment derived through the drying environment comparison unit 400.

As illustrated in FIG. 5, the correction information generating unit 600 is the difference between the reference stress S _r of the preset coating layer CL and the measurement stress S _m of the coating layer CL on the second substrate P2. When is out of a predetermined range, correction information may be generated. For example, the conditions for generating the correction information include the reference stress (S _r (t)) of the coating layer (CL) at a specific time point (t) during the drying process and the measurement stress (S) of the coating layer (CL) on the second base material (P2). _It may be the case that the difference (ΔS (t)) of _m (t) exceeds 0.5 MPa.

As illustrated in FIG. 6, the correction information generator 600 measures the measurement stress of the coating layer CL on the second substrate P2 than the absolute value of the rate of change of the reference stress S _r of the preset coating layer CL. S _m ) When the absolute value of the rate of change is greater, correction information may be generated. Here, the rate of change may be an average rate of change that is a rate of change during a specific period. For example, the condition for generating the correction information is the absolute value of the average rate of change (l {S _r (t _n )-S _r (t _n-1 ) during a specific period of the reference stress (S _r ) of the preset coating layer (CL). )} / (t _n -t _{n- 1} ) l), the average absolute change rate (l {S _m (t _n ) over a specific period of the measured stress (S _m ) of the coating layer (CL) on the second base (P2) -S _m (t _n-1 )} / (t _n -t _{n- 1} ) l) may be greater. When the drying is faster than the appropriate level, the probability of cracks on the coating layer (CL) may increase, and the determination of the case where the drying is faster than the appropriate level is estimated by comparing the absolute values of the change rates of the reference stress and the measured stress. Because you can try.

The coating layer drying control system having the above-described configuration includes a second facility for drying the second base material on which the coating layer is formed and measuring the stress of the coating layer separately from the first facility for drying and mass-producing the first base material on which the coating layer is formed, and the second equipment. Since the drying environment in the facility can be synchronized with the drying environment in the first facility, there is an advantage that the stress of the coating layer on the mass-produced first substrate can be predicted close to the actual.

In addition, the coating layer drying control system compares the measurement stress of the coating layer on the second substrate with the reference stress of the preset coating layer to generate correction information that can correct the drying profile, and based on the correction information, drying in the first facility Since it is possible to control the environment, there is an advantage in that a substrate having an excellent quality coating layer can be manufactured in consideration of the stress of the actual coating layer.

The embodiments described above are merely for explaining some examples of the technical idea, and the scope of the technical idea is not limited to the described embodiments, and is within the scope of the technical idea by those skilled in the art. There can be various changes, modifications or substitutions in the. For example, components or features described together in a specific embodiment may be implemented in a distributed manner, and components or features described in each of different embodiments may be implemented in a combined form. Likewise, the components or features described in each claim may be implemented by being dispersed or combined with each other. And all of the above implementations should be regarded as belonging to the scope of this technical idea.

1000: coating layer drying control system
100: first line
110: transfer unit
120: drying zone
130: first drying unit
140: first control unit
150: 1st Dry Environment Information Generation Department
160: first coating unit
200: second line
210: drying room
220: second drying unit
230: second control unit
240: stress measurement unit
250: 2nd Dry Environment Information Generation Department
260: second coating unit
270: transfer unit
280: transfer unit
300: coating agent supply unit
310: supply channel
320: first channel
330: second channel
400: dry environment comparison department
500: drying profile storage
600: correction information generation unit
P1: First substrate
P2: Second substrate
C: coating agent
CL: coating layer

Claims (10)

A transfer unit for transferring a first base material on which a coating layer is formed by applying a coating agent, one or more drying zones arranged along the transfer direction, and a first drying unit disposed in each of the drying zones to dry the first base material, and A first facility including a first control unit for controlling the first drying unit to control the drying environment of the drying zone; And
In order to control the drying environment of the drying chamber, a drying chamber having a drying space for drying a second base material on which a coating layer is formed by coating a coating agent, a second drying unit disposed in the drying chamber to dry the second base material, It includes; a second control unit including a second control unit for controlling the second drying unit and a stress measurement unit for measuring the stress of the coating layer on the second base;
The second control unit controls the second drying unit so that a drying environment corresponding to the drying environment of the drying zone in which the first base material is located is formed in the drying chamber, a coating layer drying control system. According to claim 1,
The first facility includes a first coating unit for applying a coating agent on the first base material before the coating layer is formed,
The second facility includes a second coating unit for applying a coating agent on the second base material before the coating layer is formed,
A coating layer drying control system further comprising a coating agent supply unit supplying a coating agent to the first coating unit and the second coating unit. According to claim 2,
The coating agent supply unit comprises a supply channel through which the coating agent is supplied, a first channel connecting the supply channel and the first coating unit, and a second channel connecting the supply channel and the second coating unit, controlling the coating layer drying system. According to claim 1,
The first facility includes a first drying environment information generating unit that measures the drying environment of the drying zone to generate first drying environment information,
The second facility includes a second drying environment information generating unit that measures the drying environment of the drying room and generates second drying environment information,
The second control unit controls the second drying unit so that the second drying environment information converges to the first drying environment information, the coating layer drying control system. According to claim 1,
It includes a drying profile storage unit for storing a drying profile for controlling the first drying unit according to the drying time,
The first control unit controls the first drying unit based on the stored drying profile, coating layer drying control system. The method of claim 5,
The second control unit controls the second drying unit based on the stored drying profile, coating layer drying control system. The method of claim 5,
The drying profile is derived on the basis of a reference stress of a predetermined coating layer according to the drying time, the coating layer drying control system. The method of claim 7,
Further comprising; a correction information generating unit for comparing the measurement stress of the coating layer on the second substrate measured by the stress measurement unit and the reference stress of the preset coating layer to generate correction information capable of correcting the drying profile; ,
The first control unit controls the first drying unit based on the correction information of the drying profile, coating layer drying control system. The method of claim 8,
The correction information generating unit,
When the difference between the reference stress of the predetermined coating layer and the measurement stress of the coating layer on the second substrate is out of a predetermined range, the correction information is generated, the coating layer drying control system. The method of claim 8,
The correction information generating unit,
The coating layer drying control system generates the correction information when the absolute value of the change rate of the measured stress of the coating layer on the second base is greater than the absolute value of the change rate of the reference stress of the preset coating layer.

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