An intelligent coating printing system for thin films and an intelligent drying control method

Abstract

The application discloses a kind of intelligent coating printing system and intelligent drying control method for film, belong to coating and ink printing technical field, including the unwinding device, coating printing device and winding device arranged in sequence, still include drying device, control device and detection device;It is dried online to the substrate not printed by drying device, simultaneously, according to the temperature and humidity of the substrate before drying detected by detection device, the conveying efficiency of conveying substrate of control device is used to coordinate control unwinding device and the ventilation temperature and ventilation volume of drying device, so that the substrate after drying reaches ideal drying condition, reduces the product quality defect caused by coating material or printing ink cannot be uniformly attached on substrate surface.This application is used for the intelligent coating printing system and intelligent drying control method for film, can realize intelligent response to environmental change, always guarantee the drying effect of substrate and the highest efficiency of equipment, effectively improve the production efficiency and product qualification rate of film.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coating and ink printing, and particularly relates to an intelligent coating and printing system for a film and an intelligent drying control method. BACKGROUND

[0002] In a film production process, a coating machine is generally used to coat a specific functional glue, paint, ink or the like on a rolled substrate, and then the coated substrate is cut into pieces or rolled up after drying. Alternatively, a printing machine is used to support a printing plate with printed text and images on the printing machine, and then ink is applied to the places with text and images on the printing plate, and then transferred to paper or other substrates directly or indirectly.

[0003] In the traditional film production process, the substrate is not generally dried during coating or printing. Most inks and most paints are dispersed in hydrophobic solvents. When the air humidity is too high or the substrate has strong water absorption, the substrate surface will contain a certain amount of moisture. During the coating or printing process, the substrate surface moisture and the paint or ink are incompatible, resulting in poor adhesion. After printing, the product coating surface often has bubbles, cracks, and uneven appearance, which ultimately causes product quality defects to a certain extent.

[0004] At present, although the substrate can be placed in an oven for advance centralized drying, due to the large production batch of the film, the initial printing effect is good. However, as the time of the dried substrate exposed in the environment increases, the substrate is prone to re-humidification, resulting in gradually deteriorating printing effect. After several hours, the printing appearance is not up to standard, which cannot realize continuous production and has low production efficiency. SUMMARY

[0005] In view of one or more of the above defects or improvement needs of the prior art, the present application provides an intelligent coating and printing system for a film and an intelligent drying control method, which can dry the substrate online to improve the printing effect of the product.

[0006] To achieve the above-mentioned purpose, one aspect of the present application provides an intelligent coating and printing system for a film, which comprises unwinding device, coating and printing device and winding device arranged in sequence, and further comprises drying device, control device and detection device.

[0007] The drying device is arranged between the unwinding device and the coating and printing device, and comprises a drying chamber, an air inlet mechanism and an air outlet mechanism. The air inlet mechanism is electrically connected with the control device.

[0008] The air inlet mechanism comprises a compressed air station and a heating assembly, an output end of the compressed air station is communicated with the heating assembly to heat the air output by the compressed air station through the heating assembly, and an output end of the heating assembly is communicated with the drying chamber to input the heated air into the drying chamber to dry the film substrate;

[0009] The air outlet mechanism is communicated with the drying chamber to exhaust the drying chamber;

[0010] The detection device is arranged corresponding to the substrate and arranged between the unwinding device and the drying chamber to detect the temperature and humidity of the substrate before drying, and the detection device is electrically connected with the control device;

[0011] And the unwinding device is electrically connected with the control device.

[0012] As a further improvement of the present application, the compressed air station comprises an air compressor, and the air compressor is a variable frequency air compressor to control the air flux by adjusting the output frequency of the air compressor;

[0013] And / or

[0014] The heating assembly is a variable frequency heating assembly.

[0015] As a further improvement of the present application, a rotary nozzle is further arranged in the drying chamber and communicated with the output end of the heating assembly to uniformly disperse the heated gas on the surface of the substrate through the rotary nozzle.

[0016] As a further improvement of the present application, an adjusting valve is further arranged between the rotary nozzle and the output end of the heating assembly to control the communication between the heating assembly and the drying chamber through the adjusting valve and control the air flux by controlling the opening degree of the adjusting valve.

[0017] As a further improvement of the present application, the detection device comprises a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are respectively electrically connected with the control device.

[0018] Another aspect of the present application provides an intelligent drying control method for an intelligent coating and printing system of a film, which is suitable for any one of the intelligent coating and printing systems and enters a substrate surface dew point calculation program and a mass transfer algorithm in a control device, and comprises the following steps:

[0019] S100: The control device sets the output gas temperature Ts of the air inlet mechanism;

[0020] S200: detecting and feeding back the ambient temperature T of the substrate to the control device by using a temperature sensor; detecting the surface humidity of the substrate by using a humidity sensor and feeding back to the control device, the control device outputting the water content per unit area of the substrate according to the surface wetting performance curve of the substrate, and calculating the actual required mass Qa of the substrate surface according to the water content per unit area;

[0021] S300: the control device calculates the binary diffusion coefficient according to the output gas temperature Ts of the air inlet mechanism, then calculates the local convective mass transfer coefficient according to the binary diffusion coefficient, and calculates the mass flow density according to the local convective mass transfer coefficient;

[0022] S400: the control device calculates the unit drying surface mass transfer Qr according to the actual required mass Qa of the substrate surface and the mass transfer contact area, and according to the set conveying rate of the substrate;

[0023] S500: calculating the actual required drying compressed air quantity Q, and outputting the air inlet frequency of the air inlet mechanism;

[0024] S600: the control device controls the unwinding device and the air inlet mechanism to operate according to the above setting and calculation values.

[0025] As a further improvement of the present application, step S100 specifically comprises the following steps:

[0026] S110: obtaining the corresponding substrate heat deformation performance curve;

[0027] S120: obtaining the maximum temperature of the substrate in the deformation range according to the heat deformation curve, and comparing it with the maximum temperature that the air inlet mechanism can achieve;

[0028] If the critical temperature is lower than the maximum temperature that the air inlet mechanism can achieve, the output gas temperature Ts of the air inlet mechanism is equal to the critical temperature value;

[0029] If the critical temperature is higher than the maximum temperature that the air inlet mechanism can achieve, the output gas temperature Ts of the air inlet mechanism is equal to the maximum temperature that the air inlet system can achieve.

[0030] As a further improvement of the present application, in step S500, if the output air inlet frequency of the air inlet mechanism is greater than the maximum frequency allowed by the air inlet mechanism, Q is the drying compressed air quantity that can be provided at the maximum frequency of the air inlet mechanism, and the required conveying rate of the substrate is inversely deduced therefrom.

[0031] As a further improvement of the present application, in step S500, the drying compressed air quantity Q and Qr have the following relationship:

[0032] Q=Qr×I

[0033] Wherein, I is a correction factor.

[0034] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0035] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0036] (1) The present invention provides an intelligent coating and printing system and an intelligent drying control method for thin films. By setting up a drying device, a control device and a detection device in the intelligent coating and printing system, the unprinted substrate is dried online by the drying device. At the same time, the control device coordinates and controls the conveying efficiency of the unwinding device and the ventilation temperature and ventilation volume of the drying device based on the temperature and humidity of the substrate before drying detected by the detection device. This ensures that the dried substrate reaches the ideal drying conditions and reduces product quality defects caused by the coating material or printing ink not being uniformly adhered to the substrate surface.

[0037] (2) The present invention provides an intelligent coating and printing system and an intelligent drying control method for thin films. By connecting the output end of the heating component to the rotating nozzle, the heating gas is evenly dispersed on the surface of the substrate through the rotating nozzle, thereby improving the uniformity of substrate drying.

[0038] (3) The intelligent coating and printing system and intelligent drying control method of the present invention for thin films can intelligently respond to changes in the environment, always ensure the drying effect of the substrate and the highest efficiency of the equipment, and solve the technical defects of traditional technology where the substrate surface contains a certain amount of moisture, and the moisture on the substrate surface is incompatible with the coating or ink during the coating or printing process, resulting in poor adhesion effect. It can ensure stable and continuous operation of the equipment. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the overall structure of the intelligent coating and printing system and intelligent drying control method for thin films in an embodiment of the present invention.

[0041] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Unwinding device; 2. Humidity sensor; 3. Temperature sensor; 4. Compressed air station; 5. Heating assembly; 6. Valve body; 7. Rotary nozzle; 8. Drying chamber; 9. Screen printing device; 10. Rewinding device; 11. Substrate; 12. Air inlet mechanism; 13. Air outlet mechanism. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0047] Embodiments:

[0048] Referring to Figure 1 The intelligent coating printing system for the film in the preferred embodiment of the present application comprises a control device, an unwinding device 1, a detection device and a drying device. The unwinding device 1, the detection device and the drying device are respectively connected with the control device, so that the operation parameters of each device are set by the control device to control the coordinated operation of each device.

[0049] Specifically, as shown in Figure 1 The substrate 11 in the preferred embodiment is stored in a roll on the unwinding device 1, and the substrate 11 is fed by unwinding on the unwinding device 1. Preferably, a frequency conversion driving device is provided in the unwinding device 1 and connected with the control device, so that the unwinding speed of the unwinding device 1 is controlled by the control device, thereby controlling the conveying rate of the substrate 11.

[0050] Preferably, the detection device is provided corresponding to the substrate 11 to detect the temperature and humidity of the undried substrate 11 on line, and the detection device is connected with the control device to transmit the detection results to the control device. As shown in Figure 1 The detection device in the preferred embodiment comprises a humidity sensor 2 and a temperature sensor 3 to detect the temperature of the substrate 11 and the surface humidity of the substrate 11 respectively, and transmit the real-time temperature value and humidity value detected to the control device.

[0051] Further, the substrate 11 unwound by the unwinding device 1 is pulled to the drying device in the preferred embodiment, so that the substrate 11 is dried by the drying device.

[0052] As shown in Figure 1 The drying device in the preferred embodiment comprises a drying chamber 8, an air inlet mechanism 12 and an air outlet mechanism 13, wherein the drying chamber 8 is arranged downstream of the unwinding device 1 and the substrate 11 unwound by the unwinding device 1 is pulled into the drying chamber 8.

[0053] Correspondingly, the air inlet mechanism 12 and the air outlet mechanism 13 are communicated with the drying chamber 8 respectively, so that the heated gas is introduced into the drying chamber 8 through the air inlet mechanism 12 to dry the substrate 11 drawn into the drying chamber 8, and the gas in the drying chamber 8 is discharged through the air outlet mechanism 13.

[0054] Further, as shown in the Figure 1 The air inlet mechanism 12 includes the compressed air station 4 and the heating assembly 5, wherein the output end of the compressed air station 4 is communicated with the heating assembly 5, so that the compressed air output by the compressed air station 4 is heated by the heating assembly 5; correspondingly, the output end of the heating assembly 5 is communicated with the drying chamber 8, so that the heated air is output into the drying chamber 8 to dry the substrate 11.

[0055] The heating assembly 5 in the preferred embodiment includes a pipeline and a plurality of heating elements arranged in the pipeline, the air output by the compressed air station 4 enters the pipeline and is heated by the heating elements and then is input into the drying chamber 8 through the pipeline. Preferably, the heating elements are variable frequency heating elements and are connected with the control device, so that the compressed air is heated to a specified temperature according to actual needs.

[0056] Preferably, the valve body 6 is arranged in the heating assembly 5 corresponding to the output of the heated gas, so that the communication between the heating assembly 5 and the drying chamber 8 is controlled by the valve body 6.

[0057] Preferably, the compressed air station 4 includes an air compressor, and further preferably a variable frequency air compressor, which can provide dry and oil-free compressed air with a dew point of-50℃; the valve body 6 is arranged as an on-off valve, and the compressed air station 4 is connected with the control device, so that the output frequency of the compressed air station 4 is controlled by the control device, the amount of gas heated by the heating assembly 5 is controlled, and then the air flux input into the drying chamber 8 is controlled, so that the gas is heated according to actual needs and the waste of heated gas is reduced.

[0058] Of course, the valve body 6 can also be arranged as a regulating valve, and the regulating valve is connected with the control device, so that the air flux input into the drying chamber 8 is controlled by controlling the opening degree of the regulating valve.

[0059] Preferably, at least one rotating nozzle 7 is arranged in the drying chamber 8 and is communicated with the output end of the heating assembly 5, so that the heated gas is uniformly dispersed onto the substrate 11 by the rotating nozzle 7, so as to ensure that the surface of the substrate 11 can be sprayed and the drying uniformity of the substrate 11 is improved.

[0060] Further, the dried substrate 11 is fed to the coating and printing device to be coated or printed, and in the preferred embodiment, the coating and printing device is a screen printing device 9, and the film after coating or printing is formed is wound by the winding device 10, so as to complete the production of the film.

[0061] Further, the present application combines the actual temperature and humidity of the non-dried substrate 11, and coordinates the control of the relevant output parameters of the unwinding device 1 and the air inlet mechanism 12 through the control system, so as to improve the drying efficiency and drying quality.

[0062] Further, in the preferred embodiment, a substrate surface dew point calculation program and a mass transfer algorithm are arranged in the control device, so as to set and calculate the operation parameters of each device controlled by the control device. The control method of the intelligent control system of the present application includes but is not limited to the following steps:

[0063] S100: The control device sets the output gas temperature Ts of the air inlet mechanism 12.

[0064] In the preferred embodiment, the heat deformation performance curves of different types of substrates 11 are stored in the control device. In actual production, after the substrate 11 is selected, the control device will automatically match and read the heat deformation performance curve of the corresponding substrate 11, and obtain the maximum temperature of the substrate 11 in the deformation range, which is used as the critical temperature and compared with the maximum temperature that can be achieved by the air inlet mechanism 12, and the output temperature Ts; if the critical temperature is lower than the maximum temperature that can be achieved by the air inlet mechanism, then Ts is the critical temperature of the substrate in the deformation range; if the critical temperature is higher than the maximum temperature that can be achieved by the air inlet mechanism, then Ts is the maximum temperature that can be achieved by the air inlet mechanism.

[0065] S200: The temperature sensor detects and feeds back the ambient temperature T of the substrate to the control device; the humidity sensor detects the surface humidity of the substrate and feeds it back to the control device, and the control device outputs the water content per unit area of the substrate according to the surface wetting performance curve of the substrate, and calculates the actual required mass transfer amount Qa according to the water content per unit area.

[0066] In the preferred embodiment, the surface wetting performance curves of different types of substrates 11 are stored in the control device. In actual production, the corresponding surface wetting performance curve is read according to the type of the substrate to be dried.

[0067] S300: The control device calculates the binary diffusion coefficient according to the output gas temperature Ts of the air inlet mechanism, then calculates the local convective mass transfer coefficient according to the binary diffusion coefficient, and finally calculates the mass flow density according to the local convective mass transfer coefficient.

[0068] In one specific embodiment of the present application, the binary diffusion coefficient D, the pressure P and the temperature T at one atmosphere satisfy the following relationship:

[0069]

[0070] At room temperature, T is 298K. Assuming that the output gas temperature value Ts obtained in step S100 in this embodiment is 319K, then

[0071]

[0072] Further, the local convective mass transfer coefficient h m,x and the binary diffusion coefficient D AB There is a relationship as follows:

[0073]

[0074] Wherein, p A is the water vapor mass density; y is the distance in the mass transfer direction; p A,S is the water vapor mass density on the substrate contact surface; p A,∞ is the water vapor mass density in the compressed air

[0075] When the output heating gas is regarded as an ideal gas, P A= p A RT, then under the isothermal condition:

[0076]

[0077] Wherein, P A,S is the pressure on the substrate contact surface, and P A,∞ is the pressure of the compressed air.

[0078] Then:

[0079]

[0080] Further, under the condition of , the mass flow density n A ”

[0081] Wherein: M A is the molecular weight of water vapor; C A,S is the contact surface molar concentration; C A,∞ is the compressed air molar concentration.

[0082] S400: The control device calculates the unit drying surface mass transfer Qr according to the mass flow density n A ” and the mass transfer contact surface area, and according to the set substrate conveying rate.

[0083] In the preferred embodiment of the present application, the unit drying surface mass transfer Qr is calculated under the condition that the conveying rate of the default substrate 11 is the maximum driving rate that the system can provide.

[0084] Wherein, the unit drying surface mass transfer Qr and the conveying rate of the substrate 11 have the following relationship:

[0085]

[0086] In the formula, L is the length of the substrate drying surface; w is the width of the substrate drying surface; and v is the conveying speed of the substrate 11.

[0087] S500: Calculate the actual required amount of dry compressed air Q, and output the air intake frequency corresponding to the air intake mechanism.

[0088] wherein the actual required amount of dry compressed air Q and Qr have the following relationship:

[0089] Q=Qr x I

[0090] wherein I is a correction factor, and in actual use, the linear correlation between Q and Qr can be fitted through experimental data.

[0091] When the output frequency obtained is greater than the maximum frequency allowed by the compressed air station 4, then Q is the amount of dry compressed air that can be provided by the compressed air station 4 per unit time at the maximum frequency, and the conveying speed of the substrate 11 is inversely deduced.

[0092] S600: The control device controls the unwinding device and the air intake mechanism to operate according to the above setting and calculation values.

[0093] The intelligent coating and printing system in the present application is applied to the production of film products, such as the production of 15 mu PET film, the direct pass rate of product printing is increased from the original 65.8% to the present 89.5%, and the proportion of product quality defects caused by insufficient drying of the substrate surface in unqualified products is reduced from the original 72.01% to 2%; the production efficiency of the equipment is also improved, from the original 2000 meters / 8 hours to the present 4000 meters / 8 hours, the production efficiency is increased by 100%.

[0094] The intelligent coating and printing system for film and the intelligent drying control method in the present application can effectively dry the film substrate, so that the printing effect is not affected by weather changes during film production, and there is no difference in coating effect at the end of the substrate, the printing stability is good, the product direct pass rate is high, the production efficiency of the product is effectively improved, and has good application prospect and popularization value.

[0095] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A smart coating and printing system for thin films, comprising an unwinding device, a coating and printing device, and a rewinding device arranged sequentially, characterized in that, It also includes drying equipment, control equipment, and detection equipment; The drying device is located between the unwinding device and the coating and printing device, and includes a drying chamber, an air inlet mechanism and an air outlet mechanism. The air inlet mechanism is electrically connected to the control device so that the output gas temperature of the air inlet mechanism can be set by the control device. The air intake mechanism includes a compressed air station and a heating component. The output end of the compressed air station is connected to the heating component to heat the air output from the compressed air station. The output end of the heating component is connected to the drying chamber to input the heated air into the drying chamber to dry the film substrate. The exhaust mechanism is connected to the drying chamber and is used to exhaust air from the drying chamber; The detection device is configured corresponding to the substrate and is located between the unwinding device and the drying chamber to detect the temperature and humidity of the substrate before it is dried. The detection device is electrically connected to the control device to feed back the ambient temperature and surface humidity of the substrate to the control device. Furthermore, the unwinding device is electrically connected to the control device so that the substrate conveying rate can be set by the control device; The control device includes a substrate surface dew point calculation program and a mass transfer algorithm. Based on the substrate surface wetting performance curve, the control device outputs the substrate's unit area moisture content and calculates the actual required mass transfer on the substrate surface. The control device calculates the binary diffusion system based on the output gas temperature of the air inlet mechanism, then calculates the local convection mass transfer coefficient based on the binary diffusion coefficient, and calculates the mass flow density based on the local convection mass transfer coefficient. Based on the mass flow density and the mass transfer contact surface area, and according to the set substrate conveying rate, the control device calculates the mass transfer per unit drying surface. It also calculates the actual required amount of compressed air for drying and outputs the air inlet frequency of the air inlet mechanism. The control device controls the unwinding device and the air inlet mechanism to operate according to the above-mentioned settings and calculations.

2. The intelligent coating and printing system for thin films according to claim 1, characterized in that, The compressed air station includes an air compressor, which is a variable frequency air compressor, so as to control the air flow by adjusting the output frequency of the air compressor; and / or The heating component is a variable frequency heating component.

3. The intelligent coating and printing system for thin films according to claim 1, characterized in that, It also includes a rotating nozzle, which is disposed in the drying chamber and connected to the output end of the heating assembly, so as to uniformly disperse heating gas on the surface of the substrate through the rotating nozzle.

4. The intelligent coating and printing system for thin films according to claim 3, characterized in that, A regulating valve is also provided between the rotary nozzle and the output end of the heating assembly to control the communication between the heating assembly and the drying chamber, and to control the air flow by controlling the opening degree of the regulating valve.

5. The intelligent coating and printing system for thin films according to any one of claims 1 to 4, characterized in that, The detection device includes a temperature sensor and a humidity sensor, which are electrically connected to the control device.

6. An intelligent drying control method for an intelligent coating and printing system for thin films, characterized in that, The intelligent coating and printing system applicable to any one of claims 1 to 5, which inputs a substrate surface dew point calculation program and a mass transfer algorithm into a control device, includes the following steps: S100: The control device sets the output gas temperature Ts of the intake mechanism; S200: The temperature sensor detects and feeds back the ambient temperature T of the substrate to the control device; the humidity sensor detects the surface humidity of the substrate and feeds it back to the control device. The control device outputs the water content per unit area of ​​the substrate according to the wettability curve of the substrate surface, and calculates the actual mass transfer required by the substrate surface Qa based on the water content per unit area. S300: The control device calculates the binary diffusion coefficient based on the output gas temperature Ts of the intake mechanism, then calculates the local convection mass transfer coefficient based on the binary diffusion coefficient, and finally calculates the mass flow density based on the local convection mass transfer coefficient. S400: The control device is based on the mass flow density n A "and the mass transfer contact area, and calculate the mass transfer per unit drying surface Qr according to the set substrate conveying rate; S500: Calculates the actual required amount of dry compressed air Q and outputs the intake frequency of the intake mechanism; S600: The control device controls the unwinding device and the air intake mechanism to operate according to the above-mentioned settings and calculation values.

7. The intelligent drying control method for an intelligent coating and printing system for thin films according to claim 6, characterized in that, Step S100 specifically includes the following steps: S110: Obtain the thermal deformation performance curve corresponding to the substrate; S120: Obtain the maximum temperature of the substrate within the deformation range based on the heat deformation curve, and compare it with the maximum temperature that the air intake mechanism can achieve as the critical temperature. If the critical temperature is lower than the maximum temperature that the intake mechanism can achieve, then the output gas temperature Ts of the intake mechanism is equal to the critical temperature value. If the critical temperature is higher than the maximum temperature that the intake mechanism can achieve, then the output gas temperature Ts of the intake mechanism is equal to the maximum temperature that the intake system can achieve.

8. The intelligent drying control method for an intelligent coating and printing system for thin films according to claim 6, characterized in that, In step S500, if the air intake frequency of the output air intake mechanism is greater than the maximum allowable frequency of the air intake mechanism, then Q is the amount of dry compressed air that the air intake mechanism can provide at its maximum frequency, and the required substrate delivery rate can be deduced from this.

9. The intelligent drying control method for an intelligent coating and printing system for thin films according to claim 6, characterized in that, In step S500, the amount of dry compressed air Q and Qr have the following relationship: Q = Qr × I Where I is the correction factor.

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