Automatic adjustment system for screen printing machine

Abstract

The present invention relates to the field of printing parameter control technology, specifically to an automatic adjustment system for a screen printing machine, the system comprising: a data acquisition module that calculates the ink thickness change rate and flow rate change amplitude in a region based on sensor data on the screen printing device, organizes and classifies the information, and generates ink thickness data in the region. In the present invention, by conducting an in-depth analysis of the relationship between the ink flow rate and the thickness change, it is possible to predict the fluctuation of the ink thickness at a certain point in the future, and understand the ink distribution trend in the printing area in advance. The accuracy and dynamic adjustment capability of the ink supply are improved to ensure that the ink thickness is always maintained within a reasonable range during the printing process. At the same time, the solution performs real-time control at multiple points, and expands the coverage of monitoring and regulation by estimating the ink thickness in unmonitored areas.

Description

Technical Field

[0001] The invention relates to the technical field of printing parameter control, and in particular to an automatic adjustment system of a screen printing machine. Background Art

[0002] The field of printing parameter control technology is the technology used to optimize and automatically adjust various parameters in the printing process. Parameters include printing pressure, ink viscosity, drying speed, paper or other substrate conveying speed, and precise alignment between the screen and the substrate. By controlling the parameters, the printing quality can be improved, material waste can be reduced, and production speed can be accelerated.

[0003] Among them, the automatic adjustment system of the screen printer is a specific type of automation system designed for screen printers. Screen printers are a printing method that transfers ink to the surface of the material through a screen, and are commonly used in various applications such as graphic printing and circuit board manufacturing. In such machines, the automatic adjustment system is responsible for automatically adjusting the tension of the screen, the position of the print head, the thickness of the ink layer, and the contact pressure with the material. In addition, the system can also monitor the viscosity and fluidity of the ink during the printing process and automatically adjust it to suit different printing needs and material characteristics.

[0004] In actual operation, it is difficult for the existing technology to monitor the thickness change and flow rate fluctuation of the ink in real time, resulting in the problem of uneven ink thickness being difficult to correct in time during the printing process. Especially when printing detailed graphics, quality problems such as uneven colors and blurred lines are prone to occur. In addition, the viscosity and flow rate of the ink often change due to environmental fluctuations during the printing process, and it is difficult for the existing technology to adjust in time, resulting in the inability to stably control the ink thickness. At the same time, the control range of the existing technology is difficult to cover the ink distribution of the entire printing area, making it easy for the unmonitored area to have insufficient or excessive ink supply, resulting in material waste or reduced quality of printed products. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose an automatic adjustment system for a screen printing machine.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: an automatic adjustment system of a screen printing machine comprises:

[0007] The data acquisition module calculates the ink thickness change rate and flow rate change range in the area based on the sensor data on the screen printing equipment, organizes and classifies the information, and generates ink thickness data in the area;

[0008] The thickness prediction module analyzes the relationship between the ink flow rate and the thickness change according to the ink thickness data in the area, determines the future ink thickness fluctuation of the printing area, and generates the ink thickness change prediction result;

[0009] The error calculation module compares the ink thickness monitored in real time with the expected ink thickness during the printing process, calculates the ink thickness deviation value in the area, combines the ink thickness change rate in the ink thickness data in the area, determines the thickness correction amount of each area, and obtains the ink thickness correction result;

[0010] The multi-point control module automatically adjusts the flow rate and switching time of the ink pump based on the ink thickness correction result, estimates the thickness of the area not directly monitored in combination with the thickness data of the monitored area, optimizes the ink supply situation of the entire printing area with reference to the ink thickness change prediction result, and generates an ink supply optimization result.

[0011] As a further solution of the present invention, the step of acquiring the ink thickness data in the area is specifically as follows:

[0012] Based on the sensors on the screen printing equipment, the ink flow rate, ambient temperature, humidity and initial ink thickness information of the printing area are collected in real time to obtain the initial data set in the area;

[0013] Based on the initial data set within the region, the formula is used:

[0014]

[0015] and

[0016]

[0017] The ink thickness change rate Δh and the ink flow rate change amplitude Δv are calculated respectively to obtain the ink thickness change rate and flow rate change amplitude information;

[0018] Among them, h1 is the thickness at the first time point, h2 is the thickness at the second time point, t1 and t2 are the time values ​​of the corresponding time points, T is the ambient temperature, H is the ambient humidity, and v avg is the average ink flow rate during printing, k1, k2, k3 are adjustment coefficients, Δh max is the maximum ink thickness change monitored, v1 and v2 are the ink flow rate values ​​at two moments respectively;

[0019] According to the ink thickness change rate and flow velocity change amplitude information, an outlier cleaning operation is performed, and the ink thickness and flow velocity data are classified and integrated by region to generate ink thickness data within the region.

[0020] As a further solution of the present invention, the step of obtaining the relationship between the ink flow rate and the thickness change is specifically:

[0021] According to the ink thickness data in the area, the formula is used:

[0022]

[0023] Calculate the ink thickness deviation over time Δh t , get the ink change trend information;

[0024] Where c is the adjustment coefficient;

[0025] Based on the ink variation trend information, the ink thickness offset values ​​at multiple time points are summarized, and the thickness variation of each printing area is classified to establish time series data of ink thickness.

[0026] As a further solution of the present invention, the step of obtaining the future ink thickness fluctuation of the printing area is specifically as follows:

[0027] According to the time series data of the ink thickness, by combining the current ink thickness and the thickness change rate, the ink thickness at a certain time point in the future is predicted to obtain future ink thickness data;

[0028] According to the future ink thickness data, the current thickness of the area is compared with the future predicted thickness and matched with the standard thickness range set by the equipment, the abnormal thickness fluctuation area is identified, and the ink thickness change prediction result is generated.

[0029] As a further solution of the present invention, the step of obtaining the ink thickness deviation value in the calculation area is specifically as follows:

[0030] Combining the expected ink thickness and environmental parameters, the formula is used:

[0031]

[0032] Calculate the difference Δh between the actual measured ink thickness and the expected ink thickness error , and obtain the ink thickness deviation recognition result in the area;

[0033] Among them, h measured Indicates the ink thickness measured at the current moment, h expected represents the expected ink thickness, k1 and k2 are the adjustment coefficients for ink flow rate and ambient temperature, respectively, v avg represents the average value of ink flow rate, T represents the ambient temperature, h current Indicates the current ink thickness;

[0034] The ink thickness deviation identification results in each of the regions are summarized to obtain integrated ink thickness deviation information.

[0035] As a further solution of the present invention, the step of obtaining the thickness correction amount of each area is specifically as follows:

[0036] According to the integrated ink thickness deviation information, combined with the ink thickness change rate, the thickness change speed is analyzed and compared with the deviation to obtain the ink thickness correction amount in the area;

[0037] The ink thickness correction amounts in all the areas are summarized and compared with the expected standard values, the areas beyond the standard range are identified, the ink supply amount in the areas, as well as the flow rate and supply time of the ink pump are adjusted, and the ink thickness correction result is generated.

[0038] As a further solution of the present invention, the steps of automatically adjusting the flow rate and switching time of the ink pump are specifically as follows:

[0039] According to the ink thickness correction result and the printing area, the ink demand and supply rate in the area are adjusted to obtain ink supply information;

[0040] According to the ink supply information, the flow rate and switching time of the ink pump are adjusted to generate a preliminary adjustment result of the ink pump.

[0041] As a further solution of the present invention, the steps of obtaining the ink supply optimization result are specifically as follows:

[0042] For areas not directly monitored, the formula is used:

[0043]

[0044] Calculate the estimated ink thickness h for areas not directly monitored estimated , get ink thickness estimation data;

[0045] Among them, h monitored1 and h monitored2 They represent the ink thickness of two adjacent monitored areas, x1 and x2 represent the position coordinates of monitoring point 1 and monitoring point 2 respectively, estimated Indicates the estimated location coordinates of the unmonitored area;

[0046] According to the ink thickness estimation data and the ink thickness correction result of the monitored area, with reference to the data of the ink thickness change prediction result, the operating parameters of the ink pump in the entire printing area are optimized to generate the ink supply optimization result.

[0047] Compared with the prior art, the advantages and positive effects of the present invention are:

[0048] In the present invention, by conducting an in-depth analysis of the relationship between the ink flow rate and the thickness change, it is possible to predict the fluctuation of the ink thickness at a certain point in the future, and understand the ink distribution trend in the printing area in advance. The accuracy and dynamic adjustment capability of the ink supply are improved to ensure that the ink thickness is always maintained within a reasonable range during the printing process. At the same time, the solution performs real-time control at multiple points, and expands the coverage of monitoring and regulation by estimating the ink thickness in unmonitored areas. By calculating the ink demand and supply rate, and adjusting the ink pump in real time in combination with changes in environmental factors, the ink supply is effectively optimized, over- or under-supply is avoided, resource utilization and printing efficiency are improved, and material waste is reduced. In addition, real-time monitoring and error calculation of ink thickness further ensure the stability of printing quality, reduce quality problems caused by ink thickness deviation, and significantly improve the qualified rate of finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a system flow chart of the present invention;

[0050] Figure 2 A flow chart of the steps for obtaining ink thickness data within the region of the present invention;

[0051] Figure 3 A flow chart of the steps for obtaining the relationship between ink flow rate and thickness change according to the present invention;

[0052] Figure 4 A flow chart of the steps of obtaining the ink thickness fluctuation of the printing area in the present invention;

[0053] Figure 5 A flow chart of the steps for obtaining the ink thickness deviation value within the calculation area of ​​the present invention;

[0054] Figure 6 A flow chart of the steps for obtaining the thickness correction amount for each region of the present invention;

[0055] Figure 7 A flow chart of the steps for automatically adjusting the flow rate and switching time of the ink pump of the present invention;

[0056] Figure 8 A flow chart of the steps for obtaining the optimized results of the ink supply of the present invention. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0059] See also Figure 1 , an automatic adjustment system for a screen printing machine comprises:

[0060] The data acquisition module collects the ink flow rate, ambient temperature, humidity and initial ink thickness information of the printing area in real time based on the sensors on the screen printing equipment, calculates the ink thickness change rate and flow rate change range in the area, organizes and classifies the information, and generates ink thickness data in the area;

[0061] The thickness prediction module calculates the offset value of ink thickness over the printing process time based on the ink thickness data in the area, analyzes the relationship between ink flow rate and thickness change, predicts the ink thickness at a certain point in the future, determines the future ink thickness fluctuation of the printing area, and generates the prediction result of ink thickness change;

[0062] The error calculation module compares the ink thickness monitored in real time with the expected ink thickness during the printing process, calculates the ink thickness deviation value in the area, and determines the thickness correction amount of each area in combination with the ink thickness change rate in the ink thickness data in the area, and obtains the ink thickness correction result;

[0063] Based on the ink thickness correction results, the multi-point control module calculates the ink demand and supply rate in the area, automatically adjusts the flow rate and switching time of the ink pump, estimates the thickness of the area not directly monitored based on the thickness data of the monitored area, and optimizes the ink supply of the entire printing area with reference to the ink thickness change prediction results, generating ink supply optimization results;

[0064] The ink thickness data within the area include the ink thickness value of each point in the printing area, the flow rate distribution within each area, and the ambient temperature and humidity data. The ink thickness change prediction results include the fluctuation range of the ink thickness of each area over time, the trend analysis of the ink thickness deviation, and the possible uneven thickness distribution of each area in the future. The ink thickness correction results include the thickness deviation value of each printing area, the thickness change rate correction item of each area, and the final adjustment amount of the ink thickness deviation. The ink supply optimization results include the adjusted ink pump flow rate parameters, the ink pump opening time, and the estimated value of the ink thickness in the unmonitored area.

[0065] See also Figure 2 , the steps for obtaining the ink thickness data in the area are as follows:

[0066] Based on the sensors on the screen printing equipment, the ink flow rate, ambient temperature, humidity and initial ink thickness information of the printing area are collected in real time to obtain the initial data set in the area;

[0067] When collecting the ink flow rate, the flow rate sensor monitors the actual speed of the ink flowing during the screen printing process. The sensor captures the data and records it at a certain time interval. The ambient temperature is monitored in real time through the thermocouple in the equipment. The temperature sensor captures data at a monitoring frequency of one second. The humidity sensor monitors the ambient humidity level of the printing workshop. After all the data is transmitted and sorted through the sensor, each partition in the printing area is synchronized, and finally the values ​​are sorted into initial data that represents the current status of each partition.

[0068] Based on the initial data set within the region, the formula is used:

[0069]

[0070] and

[0071]

[0072] The ink thickness change rate Δh and the ink flow rate change amplitude Δv are calculated respectively to obtain the ink thickness change rate and flow rate change amplitude information;

[0073] Among them, h1 and h2 are the ink thickness values ​​at different time points, measured by the thickness sensor, h1 is the thickness at the first time point, h2 is the thickness at the second time point, t1 and t2 are the time values ​​at the corresponding time points, automatically obtained through the time record of the device, T is the ambient temperature, collected in real time by the temperature sensor, H is the ambient humidity, monitored by the humidity sensor, and v avgis the average ink flow rate during the printing process, which is calculated by time-weighted average of the ink flow rate data recorded by the flow rate sensor. k1, k2, and k3 are adjustment coefficients, which respectively control the influence of temperature, humidity, and maximum thickness change on the ink thickness change rate and flow rate. The adjustment coefficient is calibrated through experiments and set according to the actual process requirements. Δh max is the maximum ink thickness change monitored, the maximum fluctuation range of the ink thickness detected by the thickness sensor, v1 and v2 are the ink flow rate values ​​at different times, measured by the flow rate sensor at each time.

[0074] In a certain printing area, if the ink thickness is h1 = 0.52 mm at the first moment t1 = 10 seconds, and the ink thickness is h2 = 0.55 mm at the second moment t2 = 20 seconds, the time difference is t2-t1 = 10 seconds, the ambient temperature T = 23 degrees Celsius, the humidity H = 65%, and the average ink flow rate v avg =4.8 m / s, set adjustment coefficients k1=0.015, k2=0.02, then the ink thickness change rate is:

[0075]

[0076] If the ink flow rate is v1 = 4.6 m / s at time t1 and v2 = 5.0 m / s at time t2, the maximum thickness change Δh max =0.08 mm, set the adjustment coefficient k3 = 0.025, then the ink flow rate change range is:

[0077]

[0078] The calculated results of ink thickness change rate and flow rate change amplitude are used to adjust the ink supply in real time. Through these data, the system can identify whether the ink thickness of each printing area meets the expected requirements and whether the flow rate remains within a stable range.

[0079] According to the information of ink thickness change rate and flow velocity change amplitude, the outlier cleaning operation is performed, and the ink thickness and flow velocity data are classified and integrated by region to generate ink thickness data in the region;

[0080] The monitored data are sorted and classified. First, the data is cleaned and extreme outliers are removed. Then the ink thickness data is classified by region. The ink thickness change rate data and flow rate change amplitude data of different regions in the same time period are integrated to obtain a complete data set. The data set covers the detailed conditions of ink thickness and flow rate in each region.

[0081] See also Figure 3 , the steps for obtaining the relationship between ink flow rate and thickness change are as follows:

[0082] According to the ink thickness data in the area, the formula is used:

[0083]

[0084] Calculate the ink thickness deviation over time Δh t , get the ink change trend information;

[0085] Where c is the adjustment coefficient, which controls the effect of ink flow rate on thickness change and is determined by experimental data;

[0086] In a certain printing area, at a certain time t1 = 5 seconds, the ink thickness h1 = 0.5 mm, at another time t2 = 15 seconds, the ink thickness h2 = 0.55 mm, the equipment records the time difference t2-t1 = 10 seconds, sets the adjustment coefficient c = 0.02, and the flow rate change amplitude Δv = 0.2 m / s, then the ink thickness offset value is:

[0087]

[0088] Δh t =0.05÷10+0.02×0.2

[0089] Δh t =0.005+0.004=0.009mm / s

[0090] By calculating the offset value Δh t The direct impact of the flow rate change on the ink thickness can be analyzed by the flow rate change amplitude Δv. Specifically, the change trend of the ink thickness with the flow rate can be determined by calculating the change rate of the thickness offset value. If the flow rate change amplitude is large and the thickness offset value increases, it means that the ink flow rate has a strong effect on the thickness change, and vice versa. This shows that a slight change in flow rate will produce a quantitative fluctuation in thickness.

[0091] Based on the ink change trend information, the ink thickness offset values ​​at multiple time points are summarized, and the thickness changes of each printing area are classified to establish the time series data of ink thickness;

[0092] A preliminary prediction is made on the real-time change trend of ink thickness. First, the ink thickness offset values ​​at different time points are summarized, and the thickness changes in each printing area are preliminarily classified. According to the basic trend curve of ink thickness in different time periods, the fluctuation of thickness change rate is analyzed, and the real-time thickness change trend of each area is archived to obtain time series data reflecting the change of ink thickness.

[0093] See also Figure 4 , the specific steps for determining the future ink thickness fluctuation of the printing area are:

[0094] According to the time series data of ink thickness, by combining the current ink thickness and the thickness change rate, the ink thickness at a certain time point in the future is predicted to obtain the future ink thickness data;

[0095] To predict the ink thickness at a certain point in the future, the formula is used:

[0096] h future =h current +Δh t ×t future

[0097] Among them, h future Indicates the ink thickness at a certain point in the future, h current Indicates the ink thickness at the current time point, which is detected and recorded in real time by the thickness sensor, Δh t Indicates the offset value of ink thickness over time, t future It represents the time interval in the future. It is set according to the process time recording system. The predicted time range can be flexibly adjusted according to actual needs.

[0098] If the ink thickness at the current time point is h current = 0.55 mm (measured by thickness sensor), ink thickness deviation over time Δh t = 0.009 mm / s, set the predicted future t future =Ink thickness after 30 seconds, calculated by the formula as follows:

[0099] h future =0.55+0.009×30

[0100] h future =0.55+0.27=0.82mm

[0101] Calculations show that after 30 seconds, the ink thickness will reach 0.82 mm. During the screen printing process, the printing parameters can be adjusted in time according to the predicted thickness fluctuations to avoid the thickness exceeding the process standard, thereby ensuring stable printing quality.

[0102] Based on the future ink thickness data, the current thickness of the area is compared with the future predicted thickness, and matched with the standard thickness range set by the equipment, the abnormal thickness fluctuation area is identified, and the ink thickness change prediction result is generated;

[0103] First, compare the current ink thickness data and future predicted thickness data of each area, match them with the standard thickness range set by the equipment, and identify areas with large thickness fluctuations by analyzing the change amplitude of ink thickness in different time periods. Then summarize the change trend of ink thickness in each area over time to ensure that the thickness fluctuation of each area is within the monitoring range. Then compare the thickness difference of different areas according to the fluctuation amplitude of each time period, and establish an ink thickness fluctuation model to help confirm whether there are areas that may experience abnormal fluctuations in ink thickness in the future. Finally, generate the prediction results of ink thickness changes in each area based on the model.

[0104] See also Figure 5 , the specific steps for obtaining the ink thickness deviation value in the calculation area are:

[0105] Combining the expected ink thickness and environmental parameters, the formula is used:

[0106]

[0107] Calculate the difference Δh between the actual measured ink thickness and the expected ink thickness error , and obtain the ink thickness deviation recognition result in the area;

[0108] Among them, h measured Indicates the ink thickness measured at the current moment, obtained through the thickness sensor, h expected Indicates the expected ink thickness, which is usually set by process parameters. k1 and k2 are adjustment coefficients for ink flow rate and ambient temperature, respectively, which control the influence of flow rate and temperature on thickness deviation. The value is determined by experimental calibration under actual process conditions. avg represents the average value of ink flow rate, which is monitored by the flow rate sensor. T represents the ambient temperature, which is monitored in real time by the temperature sensor. current Indicates the current ink thickness, reflecting the actual ink thickness at that moment, obtained by the thickness sensor.

[0109] If the actual measured ink thickness h measured = 0.60 mm, expected ink thickness h expected =0.55 mm, average ink flow rate v avg =4.5 m / s, ambient temperature T = 22 degrees Celsius, set adjustment coefficients k1 = 0.01, k2 = 0.02, current ink thickness h current =0.60 mm, ink thickness deviation Δh error for:

[0110]

[0111] The results showed that the ink thickness deviation value was 0.0904 mm.

[0112] The ink thickness deviation identification results in each area are summarized to obtain integrated ink thickness deviation information.

[0113] Through the real-time data recorded by each sensor, the difference between the actual and expected ink thickness of each area is extracted, and these difference data are classified and sorted. The data of different areas in the same time period are compared to ensure that the data of all areas can accurately reflect their deviations during the summary process. Then, the standardization method is used to normalize the deviation values ​​of different areas to eliminate the impact of different areas or environmental conditions. Subsequently, according to the thickness deviation information of each area, the data is arranged according to certain rules to identify the areas that need to be focused on, and finally all deviation identification results are summarized.

[0114] See also Figure 6 , the specific steps for obtaining the thickness correction amount of each area are as follows:

[0115] According to the integrated ink thickness deviation information, combined with the ink thickness change rate, the thickness change speed is analyzed and compared with the deviation to obtain the ink thickness correction amount in the area;

[0116] For the ink thickness correction within the area, use the formula:

[0117] Δh correction =Δh error -Δh t

[0118] Where Δh correction Indicates the ink thickness correction amount in the area, which is used to correct the deviation of ink thickness and ensure the consistency of printing quality, Δh error Indicates the ink thickness deviation value, which is used to judge the difference between the actual thickness and the expected thickness, Δh t Indicates the rate of change of ink thickness.

[0119] If the ink thickness deviation Δh error = 0.0904 mm, ink thickness change rate Δh t = 0.009 mm / s, then the ink thickness correction amount Δh correction for:

[0120] Δh correction =0.0904-0.009=0.0814mm

[0121] Calculations show that the ink thickness correction for the current area is 0.0814 mm.

[0122] Summarize the ink thickness correction values ​​in all areas, compare them with the expected standard values, identify the areas that exceed the standard range, adjust the ink supply volume in the area, as well as the flow rate and supply time of the ink pump, and generate the ink thickness correction results;

[0123] By summarizing the correction data of each area, comparing the correction amount of each area with the process standard value, it is determined which areas have correction amounts exceeding the standard range, and then adjusting the ink supply to these areas. The adjustment process includes adjusting the flow rate and supply time of the ink pump to ensure that the ink thickness of each area is within the standard range, inputting the corrected ink supply parameters, adjusting the operating status of the equipment, and recording the thickness correction status of all areas to ensure that future thickness adjustments can be further optimized based on historical correction data.

[0124] See also Figure 7 , the specific steps for automatically adjusting the flow rate and switching time of the ink pump are as follows:

[0125] According to the ink thickness correction result and the printing area, the ink demand and supply rate in the area are adjusted to obtain ink supply information;

[0126] For the ink demand and supply rate within the adjustment area, the formula is used:

[0127]

[0128] Among them, Q ink Indicates the ink demand in the area, A represents the area of ​​the printing area, which is obtained by measuring the area of ​​the screen printing machine to ensure that the ink demand of each area can accurately match the actual printing area, Δh correction Indicates the ink thickness correction amount in the area, indicating that the thickness difference in the area needs to be corrected by additional ink supply, t correction Indicates the time required for ink thickness correction, which is obtained according to process requirements or equipment setting time.

[0129] If the printing area A = 5000 square millimeters, the ink thickness correction Δh correction = 0.0814 mm, correction time t correction = 60 seconds, calculate the ink demand Q in the area ink :

[0130]

[0131] Q ink =5000×0.001357=6.785mm 3 / s

[0132] The results show that the ink demand in the area is 6.785 cubic millimeters per second, which is used to guide the ink supply equipment to provide ink at this rate to ensure the accuracy of thickness correction during the printing process.

[0133] According to the ink supply information, the flow rate and switching time of the ink pump are adjusted to generate a preliminary adjustment result of the ink pump;

[0134] According to the ink demand in the area, the flow rate and switching time of the ink pump are automatically adjusted. The ink demand of each printing area is input into the ink pump control device. The flow rate of the pump is adjusted to meet the real-time demand, and then the switching time of the ink pump is adjusted to ensure the continuity and efficiency of the ink supply, ensuring that the pump only works during the required time period to avoid excess ink supply.

[0135] See also Figure 8 , the specific steps for obtaining the ink supply optimization results are:

[0136] For areas not directly monitored, the formula is used:

[0137]

[0138] Calculate the estimated ink thickness h for areas not directly monitored estimated , get ink thickness estimation data;

[0139] Among them, h estimated Used to infer the ink thickness of the unmonitored area, h monitored1 and h monitored2 They represent the ink thickness of two adjacent monitored areas, which are monitored and acquired in real time by using thickness sensors in these areas. x1 and x2 represent the position coordinates of monitoring point 1 and monitoring point 2, respectively. They are usually determined by the coordinate system of the printing area or the preset area division to ensure accurate calculation of the ink thickness in space. estimated Represents the estimated position coordinates of an unmonitored area, between two monitored areas, used to determine the interpolated position.

[0140] If the ink thicknesses of two adjacent monitored areas are h monitored1 = 0.55 mm and h monitored2 = 0.65 mm, the monitoring points are located at x1 = 10 mm and x2 = 30 mm, and the estimated position of the unmonitored area is x estimated = 20 mm, the estimated ink thickness in the unmonitored area is:

[0141]

[0142] The results show that the estimated ink thickness in the unmonitored area is 0.6 mm. This thickness estimate will be used for subsequent ink supply adjustments to ensure that the ink supply in the unmonitored area is consistent with that in the monitored area.

[0143] According to the ink thickness estimation data and the ink thickness correction results of the monitored area, and referring to the data of the ink thickness change prediction results, the operating parameters of the ink pump in the entire printing area are optimized to generate the ink supply optimization results.

[0144] By analyzing the thickness correction data of the monitored areas and combining it with the prediction results of ink thickness changes, we ensure that the future ink thickness fluctuation trend of each area has been taken into account, summarize the ink supply needs of different areas, and then input the thickness estimation data of the unmonitored areas and the prediction results of ink thickness changes into the ink supply equipment, balance the ink demand of all areas, and ensure that the ink supply matches the predicted thickness demand. Then, according to these data, adjust the flow rate and supply time of the ink pump, optimize the operating parameters of the ink pump in real time, and automatically adjust the switching time of the ink pump to ensure that the ink supply keeps pace with the changes in thickness demand. By real-time monitoring of the operating status of the ink pump, ensure that the ink supply volume matches the thickness demand of each area, and organize and archive the ink supply parameters of all areas.

[0145] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An automatic adjustment system for a screen printing machine, characterized in that: The system comprises: The data acquisition module calculates the ink thickness change rate and flow rate change range in the area based on the sensor data on the screen printing equipment, organizes and classifies the information, and generates ink thickness data in the area; The thickness prediction module analyzes the relationship between the ink flow rate and the thickness change according to the ink thickness data in the area, determines the future ink thickness fluctuation of the printing area, and generates the ink thickness change prediction result; The error calculation module compares the ink thickness data in the area with the ink thickness change prediction result, calculates the ink thickness deviation value in the area, combines the ink thickness change rate in the ink thickness data in the area, determines the thickness correction amount of each area, and obtains the ink thickness correction result; The multi-point control module automatically adjusts the flow rate and switching time of the ink pump based on the ink thickness correction result, estimates the thickness of the area not directly monitored in combination with the thickness data of the monitored area, and optimizes the ink supply of the entire printing area with reference to the ink thickness change prediction result to generate an ink supply optimization result; The steps for obtaining the ink supply optimization result are specifically as follows: For areas not directly monitored, the formula is used: ； Calculates ink thickness estimates for areas not directly monitored , get ink thickness estimation data; in, and Respectively represent the ink thickness of two adjacent monitored areas, and Respectively represent the location coordinates of monitoring point 1 and monitoring point 2, Indicates the estimated location coordinates of the unmonitored area; According to the ink thickness estimation data and the ink thickness correction result of the monitored area, with reference to the data of the ink thickness change prediction result, the operating parameters of the ink pump in the entire printing area are optimized to generate the ink supply optimization result.

2. The automatic adjustment system of the screen printing machine according to claim 1, characterized in that: The steps for obtaining the ink thickness data in the area are specifically as follows: Based on the sensors on the screen printing equipment, the ink flow rate, ambient temperature, humidity and initial ink thickness information of the printing area are collected in real time to obtain the initial data set in the area; Based on the initial data set within the region, the formula is used: and ; Calculate the ink thickness change rate respectively and the change in ink flow rate , obtain the ink thickness change rate and flow rate change amplitude information; in, is the thickness at the first time point, is the thickness at the second time point, and are the time values ​​at the corresponding time points, is the ambient temperature, is the ambient humidity, is the average ink flow rate during the printing process, , , is the adjustment factor, is the maximum ink thickness change monitored, and They are the ink flow rate values ​​at two moments respectively; According to the ink thickness change rate and flow velocity change amplitude information, an outlier cleaning operation is performed, and the ink thickness and flow velocity data are classified and integrated by region to generate ink thickness data within the region.

3. The automatic adjustment system of the screen printing machine according to claim 2, characterized in that: The steps for obtaining the relationship between the ink flow rate and the thickness change are specifically as follows: According to the ink thickness data in the area, the formula is used: ； Calculate the ink thickness deviation over time , get the ink change trend information; in, is the adjustment factor; Based on the ink variation trend information, the ink thickness offset values ​​at multiple time points are summarized, and the thickness variation of each printing area is classified to establish time series data of ink thickness.

4. The automatic adjustment system of the screen printing machine according to claim 3, characterized in that: The steps for obtaining the future ink thickness fluctuation of the printing area are specifically as follows: According to the time series data of the ink thickness, by combining the current ink thickness and the thickness change rate, the ink thickness at a certain time point in the future is predicted to obtain future ink thickness data; According to the future ink thickness data, the current thickness of the area is compared with the future predicted thickness and matched with the standard thickness range set by the equipment, the abnormal thickness fluctuation area is identified, and the ink thickness change prediction result is generated.

5. The automatic adjustment system of the screen printing machine according to claim 1, characterized in that: The specific steps for obtaining the ink thickness deviation value within the calculation area are as follows: Combining the expected ink thickness and environmental parameters, the formula is used: ； Calculate the difference between the ink thickness data in the area and the ink thickness change prediction result , and obtain the ink thickness deviation recognition result in the area; in, Indicates the ink thickness measured at the current moment in the ink thickness data within the area. represents the expected ink thickness in the ink thickness variation prediction result, and are the adjustment coefficients for ink flow rate and ambient temperature, Indicates the average value of ink flow rate, Indicates the ambient temperature, Indicates the current ink thickness; The ink thickness deviation identification results in each of the regions are summarized to obtain integrated ink thickness deviation information.

6. The automatic adjustment system of the screen printing machine according to claim 5, characterized in that: The steps for determining the thickness correction amount of each area are specifically as follows: According to the integrated ink thickness deviation information, combined with the ink thickness change rate, the thickness change speed is analyzed and compared with the deviation to obtain the ink thickness correction amount in the area; The ink thickness correction amounts in all the areas are summarized and compared with the expected standard values, the areas beyond the standard range are identified, the ink supply amount in the areas, as well as the flow rate and supply time of the ink pump are adjusted, and the ink thickness correction result is generated.

7. The automatic adjustment system of the screen printing machine according to claim 6, characterized in that: The steps for automatically adjusting the flow rate and switching time of the ink pump are specifically as follows: According to the ink thickness correction result and the printing area, the ink demand and supply rate in the area are adjusted to obtain ink supply information; According to the ink supply information, the flow rate and switching time of the ink pump are adjusted to generate a preliminary adjustment result of the ink pump.

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