Automatic tray loading coating machine based on intelligent control

Abstract

The invention relates to the technical field of coating machines, in particular to an automatic tray-loading coating machine based on intelligent control, comprising: a first coating mechanism for coating a first ointment on a base fabric to form a first coating layer; the second coating mechanism is used for coating second ointment on the first coating layer to form a moisturizing coating layer; the drying mechanism is used for respectively drying the first coating layer and the moisturizing coating layer; the coating data acquisition mechanism is used for acquiring coating process parameters; the coating data analysis mechanism is used for analyzing the coating parameters and determining the thickness of a coating layer; the intelligent coating adjusting mechanism is used for correcting the thickness of a coating layer according to a monitoring result; and the coating executing mechanism is used for controlling other mechanisms to execute corresponding parameters. The moisturizing coating layer is additionally arranged, so that the pasty fluid is prevented from cracking, the effective components of the medicine are prevented from losing, and the medicine effect is prevented from being influenced by diluting the medicine.

Description

Technical Field

[0001] This invention relates to the field of coating machine technology, and in particular to an automatic tray coating machine based on intelligent control. Background Technology

[0002] During the application and drying of multi-layer ointments, uneven moisture loss can lead to problems such as drying stress, cracking, surface crusting, or excessive internal moisture within the ointment layers, severely affecting the quality of the finished product and its efficacy. When it is necessary to apply multi-layer ointments with different functions, how to avoid mutual dilution and penetration between different layers and ensure that each layer can maintain its independent chemical properties and functional efficacy is a technical challenge.

[0003] In traditional production processes, key parameters such as coating thickness and drying temperature rely heavily on workers' experience to set, lacking real-time feedback and automatic adjustment, resulting in poor product consistency and high defect rates. The entire process, from coating and drying to cutting and packaging, often requires multiple pieces of equipment to complete in stages or a large amount of manual intervention, resulting in low production efficiency and easy contamination or damage during transportation.

[0004] Chinese Patent Publication No. CN119346364A discloses a rapid plaster coating device, comprising: a control cabinet, a work frame on the side of the control cabinet, a guide roller on the inner side of the work frame, an unwinding roller and a rewinding roller at opposite ends of the side of the work frame, a control mechanism on the inner side of the work frame, a coating component on the side of the control mechanism, an auxiliary component on the side of the coating component, and a guide component on the side of the auxiliary component. It is evident that the above-mentioned rapid plaster coating device may have the following problems: the coating thickness and drying temperature are not controlled, inevitably leading to some loss of the product's effective ingredients. Summary of the Invention

[0005] Therefore, the present invention provides an automatic tray coating machine based on intelligent control to overcome the problem of excessive moisture loss in the production of plasters in the prior art, which leads to cracking of the plaster or loss of effective ingredients.

[0006] To achieve the above objectives, the present invention provides an automatic tray coating machine based on intelligent control, comprising: The first coating mechanism is used to coat the first ointment onto the base fabric by means of the first roller group to form the first coating layer; The second coating mechanism is used to coat the second ointment onto the first coating layer by means of a second roller group to form a moisturizing coating layer; The drying mechanism includes a first drying component disposed at the output end of the first coating mechanism for drying the first coating layer and a second drying component disposed at the output end of the second coating mechanism for drying the moisturizing coating layer. The coating data acquisition mechanism is connected to the first coating mechanism, the second coating mechanism and the drying mechanism respectively, and is used to acquire the air permeability data of the base fabric, the thickness of the first coating layer, the thickness of the moisturizing coating layer, and to acquire the first moisture loss data before and after drying of the first coating layer and the second moisture loss data before and after drying of the moisturizing coating layer respectively. A coating data analysis unit, connected to the coating data acquisition unit, is used to predict the moisture loss ratio between the surface and the bottom layer of the first coating layer based on the air permeability data of the base fabric and the first moisture loss data, and to determine the thickness of the moisturizing coating layer based on the moisture loss ratio. The intelligent coating adjustment mechanism is connected to the coating data analysis mechanism to determine whether the thickness of the moisturizing coating layer is qualified based on the second moisture loss data and the moisture content of the first ointment surface layer in the moisturizing coating layer before and after drying, so as to correct the thickness of the moisturizing coating layer or adjust the thickness of the first ointment in the first coating layer. The coating execution mechanism is connected to the coating data analysis mechanism and the intelligent coating adjustment mechanism respectively, and controls the first coating mechanism, the second coating mechanism and the drying mechanism to execute corresponding control parameters. The second ointment has a higher moisture retention rate than the first ointment.

[0007] Furthermore, the second coating mechanism includes: The tray has several traction suction cup assemblies installed at its center and coating roller moving supports installed at both ends along its long axis, so that the coating roller can move in the transverse or longitudinal direction. The first coating roller and the second coating roller are perpendicular to the first roller group, respectively, for forming the moisturizing coating layer; The second ointment delivery assembly is used to store and supply the second ointment to the first coating roller and the second coating roller.

[0008] Furthermore, the coating data analysis mechanism calculates the water loss efficiency of the base fabric based on the air permeability data, and determines the water loss ratio between the surface and the bottom layer of the first coating layer by combining the first water loss data. The surface where the base fabric connects to the first coating layer is the bottom layer of the first coating layer.

[0009] Furthermore, the coating data analysis mechanism adjusts the thickness of the moisturizing coating layer according to the moisture loss ratio to compensate for the moisture loss of the first coating layer; If the moisture loss ratio is greater than 1, the thickness of the moisturizing layer is increased to reduce moisture loss from the top layer. If the moisture loss ratio is less than 1, it is determined that the thickness of the moisturizing layer should be reduced to accelerate the evaporation of moisture from the top layer.

[0010] Furthermore, the intelligent coating adjustment mechanism is used to determine to increase the thickness of the moisturizing coating layer based on the comparison result that the second moisture loss data is greater than a preset weight loss threshold, and to correct the moisture loss ratio; And, based on the comparison result that the second moisture loss data is less than or equal to a preset weight loss threshold and the moisture content of the first ointment surface layer in the moisturizing coating layer is lower than a preset moisture content threshold, the thickness of the first coating layer is determined to be increased.

[0011] Furthermore, the coating actuator includes: A first execution component, connected to the first coating mechanism, includes a metering pump that controls the supply of the first ointment and a first motor that adjusts the gap between the first rollers to perform an adjustment of the thickness of the first coating layer. The second execution unit, which is connected to the second coating mechanism, includes a second motor that controls the gap adjustment assembly of the second coating mechanism to perform adjustment of the thickness of the moisturizing coating layer; The drying control unit, which is connected to the first drying component and the second drying component, includes a temperature controller for adjusting the power of the heater and a variable frequency fan for controlling the air volume, for performing the adjustment of the drying temperature.

[0012] Furthermore, the moisturizing coating layer is disposed at the edge of the first coating layer to reduce the penetration and diffusion of the therapeutic ointment into the surrounding area; The radial width of the moisturizing coating layer is greater than a preset value to ensure the effectiveness of the moisturizing effect.

[0013] Furthermore, the intelligent coating adjustment mechanism is also used to reduce the drying temperature of the corresponding drying component when the moisture loss data of the first coating layer or the moisturizing coating layer before and after drying is higher than a preset threshold.

[0014] Furthermore, the automatic tray coating machine also includes: The traction assembly, located at the bottom of the first coating mechanism and the second coating mechanism, drives the base fabric smoothly through the coating area via the traction suction cup assembly, transports it to the cutting / packing position, and provides tension to keep it taut to prevent loosening and wrinkling. The separate cutter assembly is connected to the output end of the second drying component. The transverse cutter assembly precisely cuts the base fabric at a preset length position, and the movable baffle assembly prevents the ointment from splashing during the cutting process. The tray assembly is connected to the output end of the separating cutter assembly, and automatically places the cut finished product into the ointment tray through the auxiliary suction cup assembly; The ointment tray assembly is connected to the output end of the tray loading assembly. Several ointment trays for loading finished products are connected by a transmission belt, and the ointment trays are automatically replaced after the finished products are loaded.

[0015] Furthermore, the transverse cutter in the separating cutter assembly is a bidirectional cutter, which does not need to be reset after cutting. The ointment tray in the ointment tray group has a dual-station alternating operation structure, which does not need to be reset after replacing the ointment tray.

[0016] Compared with the prior art, the beneficial effects of the present invention are that the second coating mechanism forms a moisturizing coating layer on the first coating layer, and the moisture retention rate of the second ointment is higher than that of the first ointment. This can effectively lock in moisture, reduce moisture loss during the drying process, thereby preventing the ointment from cracking due to drying stress and preventing the loss of the active pharmaceutical ingredients. Furthermore, the second ointment has essentially the same composition as the first ointment. This design avoids excessive dilution of the first ointment by the second ointment, ensuring that the chemical properties and efficacy of the first ointment are not affected, thus improving the medicinal effect of the finished product.

[0017] Furthermore, the coating data analysis agency calculates the moisture loss ratio based on the breathability and moisture loss data of the base fabric, and adjusts the thickness of the moisturizing coating layer accordingly. This compensates for the drying stress caused by uneven moisture loss; if the base layer dries slowly, the thickness of the moisturizing layer is increased; if the base layer dries quickly, the thickness of the moisturizing layer is decreased. This dynamic adjustment optimizes the moisture distribution and reduces the risk of cracking or over-wetting.

[0018] Furthermore, the intelligent coating adjustment mechanism automatically determines whether to adjust the thickness of the moisturizing layer or the first coating layer by comparing the moisture loss data with a preset threshold. For example, when the moisture loss data is too large, the thickness of the moisturizing layer is increased; when the moisture content is too low, the thickness of the first coating layer is increased. This achieves real-time feedback and automatic correction, reduces manual intervention, and improves product consistency and yield.

[0019] Furthermore, the moisturizing coating layer is positioned at the edge of the first coating layer, and its radial width is greater than a preset value. This limits the penetration and diffusion of the therapeutic ointment into the surrounding skin, ensuring that the medication is precisely applied to the lesion area, reducing irritation to normal skin, while ensuring the effectiveness of the moisturizing effect through sufficient width.

[0020] Furthermore, the traction suction cup assembly prevents the base fabric from wrinkling, the bidirectional cutter does not require resetting, and the dual-station ointment trays are automatically replaced; thus, continuous operation from coating to tray loading is achieved, reducing pollution or damage caused by manual handling and significantly improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the automatic tray coating machine based on intelligent control in an embodiment of the present invention; Figure 2 This is a plan view of the second coating mechanism in the intelligent control-based automatic tray coating machine in an embodiment of the present invention; Figure 3 This is a process flow diagram of an automatic tray coating machine based on intelligent control in an embodiment of the present invention; Figure 4 This is a logic diagram of the automatic tray coating machine based on intelligent control regulating the coating thickness in an embodiment of the present invention. Among them, 100 is the ointment conveying assembly; 200 is the first coating mechanism; 300 is the second coating mechanism; 400 is the separating cutter assembly; 500 is the tray assembly; 600 is the ointment tray group; 700 is the coating execution mechanism; 800 is the coating data acquisition mechanism; 900 is the drying system; 310 is the first coating roller; 320 is the second coating roller; 330 is the traction suction cup assembly; 340 is the coating roller moving support; and 350 is the tray. Detailed Implementation

[0022] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0023] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0025] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Please see Figure 1 , Figure 2As shown, this embodiment of the invention provides an automatic tray coating machine based on intelligent control. The main components of the automatic tray coating machine include: The first coating mechanism 200 is used to coat the first ointment onto the base fabric by means of the first roller group to form the first coating layer; Specifically, the first roller group is aligned with the input and output directions of the base fabric, and the first ointment is delivered to the coating roller via the first ointment delivery assembly 100.

[0027] Please see Figure 2 As shown, it is a plan view of the second coating mechanism in the automatic tray coating machine based on intelligent control in an embodiment of the present invention. The second coating mechanism 300 is used to coat the second ointment on the first coating layer through the second roller group to form a moisturizing coating layer. Specifically, the second coating mechanism 300 includes: The tray 350 has several traction suction cup assemblies 330 installed at the center of the top, and coating roller moving supports installed at both ends of the long axis to move the coating roller in the transverse or longitudinal direction. The first coating roller 310 and the second coating roller 320 are perpendicular to the first roller group, respectively, for forming the moisturizing coating layer; The second ointment delivery assembly 100 is used to store and supply the second ointment to the first coating roller 310 and the second coating roller 320.

[0028] The drying mechanism includes a first drying component disposed at the output end of the first coating mechanism 200 for drying the first coating layer and a second drying component disposed at the output end of the second coating mechanism 300 for drying the moisturizing coating layer; preferably, the preset drying temperature of the first drying mechanism is 30°C and the preset drying time is 30 min, and the preset drying temperature of the second drying mechanism is 40°C. Specifically, the first ointment and the second ointment have the same core medicinal function. The difference is that the second ointment has additional moisturizing ingredients. After forming a moisturizing coating layer, it can effectively reduce moisture loss during the subsequent drying process, thus reducing the impact on the medicinal effect of the finished product.

[0029] It is understood that in this embodiment, the moisturizing coating layer only covers the four sides of the first coating layer to avoid excessive dilution of the drug concentration of the first ointment, which would affect its absorption and therapeutic effect. In addition, it can reduce the irritation to normal skin caused by the penetration and diffusion of the therapeutic ointment into the surrounding area during use. Its width is greater than the preset width value to ensure the effectiveness of its moisturizing effect. Preferably, the preset width value is 50mm.

[0030] The coating data acquisition mechanism 800 is connected to the first coating mechanism 200, the second coating mechanism 300 and the drying mechanism respectively, and is used to acquire the air permeability data of the base fabric, the thickness of the first coating layer, the thickness of the moisturizing coating layer, and the first moisture loss data before and after drying of the first coating layer and the second moisture loss data before and after drying of the moisturizing coating layer respectively. Specifically, an air permeability meter is set at the input end of the first coating mechanism 200 to obtain air permeability performance data of the base fabric; a thickness detector is set at the output end of the first coating mechanism 200 to obtain the thickness of the first coating layer; and mass detectors are set at the input and output ends of the first drying component to obtain the mass data of the base fabric before and after drying in the first drying component, and the difference is the moisture loss data of the first coating layer. A thickness detector is set at the output end of the second coating mechanism 300 to obtain the thickness of the moisturizing coating layer. Mass detectors are set at the input and output ends of the second drying component to obtain the mass data of the base fabric before and after drying in the second drying component. The difference is the moisture loss data of the moisturizing coating layer.

[0031] A coating data analysis unit, connected to the coating data acquisition unit 800, is used to predict the moisture loss ratio between the surface and the bottom layer of the first coating layer based on the air permeability data of the base fabric and the first moisture loss data, and to determine the thickness of the moisturizing coating layer based on the moisture loss ratio. Specifically, the coating actuator 700 includes: A first execution component, connected to the first coating mechanism 200, includes a metering pump that controls the supply of the first ointment and a first motor that adjusts the gap between the first rollers to perform an adjustment of the thickness of the first coating layer. The second execution unit, which is connected to the second coating mechanism 300, includes a second motor that controls the gap adjustment assembly of the second coating mechanism 300 to perform adjustment of the thickness of the moisturizing coating layer; The drying control unit, which is connected to the first drying component and the second drying component, includes a temperature controller for adjusting the power of the heater and a variable frequency fan for controlling the air volume, for performing the adjustment of the drying temperature.

[0032] The traction assembly, located at the bottom of the first coating mechanism 200 and the second coating mechanism 300, drives the base fabric smoothly through the coating area via the traction suction cup assembly 330, transports it to the cutting / packing position, and provides tension to keep it taut to prevent loosening and wrinkling. The separating cutter assembly 400 is connected to the output end of the second drying component. The transverse cutter assembly precisely cuts the base fabric at a preset length position, and the movable baffle assembly prevents the ointment from splashing during the cutting process. Among them, the transverse cutter in the separate cutter assembly 400 is a bidirectional cutter and does not need to be reset after cutting; The tray assembly 500 is connected to the output end of the separating cutter assembly 400, and the cut finished product is automatically placed into the ointment tray through the auxiliary suction cup assembly; The ointment tray assembly 600 is connected to the output end of the tray loading assembly 500. Several ointment trays for loading finished products are connected by a transmission belt, and the ointment trays are automatically replaced after the finished products are loaded.

[0033] Among them, the ointment tray in the ointment tray group 600 has a dual-station alternating operation structure, and does not need to be reset after the ointment tray is replaced.

[0034] Specifically, the water loss efficiency of the base fabric is calculated based on the air permeability data, and the water loss ratio between the surface and the bottom layer of the first coating layer is determined by combining the first water loss data. The coating data analysis agency determines the thickness of the moisturizing coating layer based on the moisture loss ratio to compensate for the uneven moisture distribution and drying stress caused by the moisture loss ratio of the first coating layer. If the moisture loss ratio is greater than 1, it means that the drying speed of the bottom layer is less than that of the top layer, and the thickness of the moisturizing layer is increased to reduce the moisture loss of the top layer; if the moisture loss ratio is less than 1, it means that the drying speed of the bottom layer is greater than that of the top layer, and the moisturizing layer is reduced to accelerate the evaporation of moisture from the top layer. Specifically, the formula for calculating the water loss ratio is: ; Where R is the water loss ratio. M0 represents the moisture loss data of the first coating layer, which is a preset moisture loss data of the first coating layer, preferably 20% of the weight of the first coating layer before drying. G represents the air permeability data, where G0 is a preset air permeability data, preferably the product of the water vapor transmission rate at 30°C and the preset drying time in the air permeability test of the base fabric, wherein the preset drying time is 30s, and k is an empirical correction coefficient, preferably 1.2. In this embodiment, the air permeability data is the product of the water vapor transmission rate at the drying temperature and the drying time of the first coating layer in the air permeability test of the base fabric using an air permeability meter.

[0035] Specifically, the preset moisturizing layer thickness is the same as the coating layer thickness. When the moisture loss ratio R is not equal to 1, the moisturizing layer thickness is adjusted to R times the preset moisturizing layer thickness. The coating layer thickness is set according to the specific application scenario, which will not be elaborated here.

[0036] The intelligent coating adjustment mechanism is connected to the coating data analysis mechanism to determine whether the thickness of the moisturizing coating layer is qualified based on the moisture loss data of the moisturizing coating layer before and after drying, and the moisture content of the first ointment surface layer in the moisturizing coating layer before and after drying, so as to correct the thickness of the moisturizing coating layer or adjust the thickness of the first ointment in the first coating layer. Specifically, when the detected second moisture loss data exceeds a preset weight loss threshold, it indicates that the moisturizing coating has failed. The thickness of the moisturizing coating layer is increased by 10%, and the moisture loss ratio in the coating data analysis mechanism is recalculated, with the k value increased. Preferably, the increase in the k value is 10%. Preferably, the preset weight loss threshold is 20% of the total weight before drying. When the second moisture loss data is less than or equal to the preset weight loss threshold, and the moisture content of the surface layer of the first ointment in the moisturizing coating is lower than the preset moisture content threshold, it indicates that the thickness of the first coating is too low, and the thickness of the first coating is increased by 10%; preferably, the moisture content threshold is 15%. Specifically, the intelligent coating adjustment mechanism is also used to reduce the drying temperature of the corresponding drying component when the moisture loss data of the first coating layer or the moisturizing coating layer before and after drying is higher than a preset threshold. In this embodiment, the decrease in drying temperature is directly related to the ratio of the moisture loss data of the first coating layer or the moisturizing coating layer to a preset threshold. ;

[0037] Wherein, ΔT is the decrease in drying temperature, V is the moisture loss data of the first coating layer or moisturizing coating layer before and after drying, V0 is the preset threshold, T0 is the base temperature adjustment, preferably, V0 is 20% of the total weight before drying, and T0 is 5℃.

[0038] The coating execution mechanism 700 is connected to the coating data analysis mechanism and the intelligent coating adjustment mechanism, respectively, and controls the first coating mechanism 200, the second coating mechanism 300 and the drying mechanism to execute corresponding control parameters. The second ointment has a higher moisture retention rate than the first ointment. Example

[0039] After checking that the coating machine is fault-free, put the nonwoven fabric into the first coating mechanism 200, use the traction suction cup in the traction assembly to hold the nonwoven fabric, start the coating machine, and begin the coating operation.

[0040] The air permeability of the nonwoven fabric was tested using an air permeability meter, and its water vapor transmission rate was 50 g / m³. 2 / h, the nonwoven fabric passes through the first coating structure to form the first coating layer. The weight of 1㎡ of nonwoven fabric is measured, and it continues to enter the first drying assembly, where it is dried at 30℃ for 30 minutes. The weight is measured again, and the difference between the two weight measurements is 42g. The data analysis of the coating showed that the moisture loss ratio was 1, so the coating could continue to be applied according to the preset thickness of the moisturizing layer. The nonwoven fabric continues to pass through the second coating structure to form a moisturizing coating layer. The weight of 1㎡ of nonwoven fabric is measured, and it continues to enter the second drying component. It is dried at 40℃ for 30 minutes, and its weight is measured again. The difference between the two weight measurements is 38g, indicating a good moisturizing effect.

[0041] When the nonwoven fabric runs 610mm, the movable baffle assembly falls down, and after running another 10mm, it stops. At this point, the total running time is 610mm. After the traction suction cup is emptied and reset, the auxiliary suction cup in the tray assembly picks up the nonwoven fabric, and the separation cutter assembly 400 starts cutting. The cut product is placed into the ointment tray assembly 600 through the tray assembly 500.

[0042] Comparative example: Except for the absence of a moisturizing coating layer and its corresponding process, all other steps are the same. The plaster is produced using the same first coating layer of the same thickness and the same base fabric, and is manufactured using the same process.

[0043] The plasters used in the examples and comparative examples were tested. The testing environment was set up by applying the plasters to a surface at a simulated human body temperature of 36°C for one day, and then testing the data obtained from the first coating layer. The test data are shown in the table below: Table 1 Product Quality Inspection Data Testing items Example Comparative Example Active ingredient content 9.8% 6.2% Initial moisture content (mean) of the first coating layer 32% 31% Moisture content (mean) of the first coating layer after testing. 19% 14% Peel strength 1.4 N / cm 1.1 N / cm As can be seen from Table 1, the present invention effectively improves the content of active ingredients and water content by adding a moisturizing layer, and reduces drying stress cracking and paste adhesion failure caused during the drying process; its peel strength is improved, which more effectively reduces the rate of detachment.

[0044] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An intelligent control based automatic tray coater, characterized in that, The application relates to a coating device for a plaster, comprising: a first coating mechanism for coating a first plaster on a base cloth through a first roller group to form a first coating layer; a second coating mechanism for coating a second plaster on the first coating layer through a second roller group to form a moisturizing coating layer; a drying mechanism comprising a first drying assembly arranged at the output end of the first coating mechanism to dry the first coating layer and a second drying assembly arranged at the output end of the second coating mechanism to dry the moisturizing coating layer; a coating data acquisition mechanism connected with the first coating mechanism, the second coating mechanism and the drying mechanism to acquire the air permeability data of the base cloth, the thickness of the first coating layer, the thickness of the moisturizing coating layer, and the first water loss data before and after the first coating layer is dried and the second water loss data before and after the moisturizing coating layer is dried; a coating data analysis mechanism connected with the coating data acquisition mechanism to predict the water loss ratio of the surface layer and the bottom layer of the first coating layer based on the air permeability data of the base cloth and the first water loss data and to determine the thickness of the moisturizing coating layer based on the water loss ratio; an intelligent coating adjustment mechanism connected with the coating data analysis mechanism to determine whether the thickness of the moisturizing coating layer is qualified based on the second water loss data and the water content of the surface layer of the first plaster in the moisturizing coating layer before and after drying and to correct the thickness of the moisturizing coating layer or adjust the thickness of the first plaster of the first coating layer; a coating execution mechanism connected with the coating data analysis mechanism and the intelligent coating adjustment mechanism to control the first coating mechanism, the second coating mechanism and the drying mechanism to execute corresponding control parameters. The water retention rate of the second plaster is higher than that of the first plaster.

2. The intelligent control based auto-tray coater of claim 1, wherein, The second coating mechanism comprises: a tray with a plurality of traction suction disc assemblies arranged at the upper central position and coating roller moving supports arranged at the two ends of the long axis direction to move the coating rollers in the transverse or longitudinal direction; first and second coating rollers arranged vertically with the first roller group to form the moisturizing coating layer; a second plaster conveying assembly for storing and providing the second plaster to the first and second coating rollers.

3. The intelligent control based auto-tray coater of claim 2, wherein, The coating data analysis mechanism calculates the water loss efficiency of the base cloth according to the air permeability data and determines the water loss ratio of the surface layer and the bottom layer of the first coating layer in combination with the first water loss data. The surface of the base cloth connected with the first coating layer is the bottom layer of the first coating layer.

4. The intelligent control based auto-tray coater of claim 3, wherein, The coating data analysis mechanism adjusts the thickness of the moisturizing coating layer to compensate for the water loss of the first coating layer according to the water loss ratio. If the water loss ratio is greater than 1, the thickness of the moisturizing layer is increased to reduce the water loss of the top layer. If the water loss ratio is less than 1, it is determined that the thickness of the moisturizing layer is reduced to accelerate the evaporation of the water in the top layer.

5. The intelligent control based auto-tray coater of claim 4, wherein, The intelligent coating adjustment mechanism determines to increase the thickness of the moisturizing coating layer according to the comparison result that the second water loss data is greater than a preset water loss threshold and corrects the water loss ratio. and, determining to increase the thickness of the first coating layer according to the comparison result that the second water loss data is less than or equal to a preset water loss threshold and the moisture content of the first ointment surface layer in the moisturizing coating layer is lower than a preset moisture content threshold.

6. The intelligent control based auto-tray coater of claim 5, wherein, The coating execution mechanism comprises: a first execution assembly connected with the first coating mechanism, comprising a metering pump for controlling the first ointment supply amount and a first motor for adjusting the gap between the first roller set, for executing the adjustment of the thickness of the first coating layer; a second execution assembly connected with the second coating mechanism, comprising a second motor for controlling the gap adjustment assembly of the second coating mechanism, for executing the adjustment of the thickness of the moisturizing coating layer; a drying control unit connected with the first drying assembly and the second drying assembly, comprising a temperature controller for adjusting the power of the heater and a variable frequency fan for controlling the air volume, for executing the adjustment of the drying temperature.

7. The intelligent control based auto-tray coater according to any one of claims 1-6, wherein, The moisturizing coating layer is arranged at the edge of the first coating layer to reduce the penetration and diffusion of the therapeutic ointment to the surrounding; wherein the radial width of the moisturizing coating layer is greater than a preset value to ensure the effectiveness of the moisturizing effect.

8. The intelligent control based auto-tray coater according to any one of claims 1-6, wherein, The intelligent coating adjustment mechanism is also used to reduce the drying temperature of the corresponding drying assembly when the water loss data of the first coating layer or the moisturizing coating layer before and after drying is higher than a preset threshold.

9. The smart control based auto-tray coater of claim 8, wherein, The automatic tray coating machine further comprises: a traction assembly located at the bottom of the first coating mechanism and the second coating mechanism, which drives the base fabric to pass through the coating area smoothly through the traction suction cup assembly, transports it to the cutting / tray loading position, and provides tension to make it tight to prevent loose wrinkles; a separation cutter assembly connected with the output end of the second drying assembly, which accurately cuts the base fabric at a preset length position through the transverse cutter assembly, and avoids ointment splashing during cutting through the movable baffle assembly; a tray loading assembly connected with the output end of the separation cutter assembly, which automatically puts the cut finished product into the ointment tray through the auxiliary suction cup assembly; an ointment tray group connected with the output end of the tray loading assembly, a plurality of ointment trays for loading finished products are connected through a transmission belt, and the ointment tray is automatically replaced after the finished product tray loading is completed.

10. The smart control based auto-tray coater of claim 9, wherein, The transverse cutter in the separation cutter assembly is a bidirectional cutter that does not need to be reset after cutting is completed, and the ointment tray in the ointment tray group is a double-station alternating operation structure that does not need to be reset after replacing the ointment tray.

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