A simple inkjet manufacturing process and system

Abstract

The present application relates to the technical field of printing, and in particular to a simple inkjet manufacturing process and system, wherein the inkjet manufacturing system includes: an image data acquisition module, which acquires the ink layer thickness of the printed image; a color quality analysis module, which analyzes the quality of the printed image according to the ink layer thickness and obtains the quality analysis result; an ink layer wear resistance grading test module, which performs ink layer wear resistance grading tests on five sample points according to the local printed images in different thickness ranges, and obtains the ink mark analysis; a color overlay module, which performs basic color matching according to the ink layer thickness and color quality of each color domain of the printed color of the printed image; an inkjet module, which sprays ink based on the printed pattern unit data; a drying module, which determines the drying temperature, humidity and time of the carton based on the ink mark analysis; and an oil spraying module, which performs fixed-point oil spraying based on the printed pattern that has completed the drying process. It can ensure that the inkjet coating reaches a completely dry state before the oil spraying process is carried out.

Description

Technical Field

[0001] The present application relates to the technical field of printing, and in particular to a simple inkjet manufacturing process and system. Background Art

[0002] Cartons are tools used to carry items. Using cartons for packaging is convenient for packaging and transportation of items, and can also provide effective protection for the items. In order to help users quickly understand the items in the box, it is necessary to print fonts or patterns on the cardboard during carton processing so that it can serve as an advertising promotion and identification function.

[0003] In the prior art, the surface of the carton is generally printed by inkjet printing, which can obtain relatively clear fonts on the surface of the carton without damaging the carton.

[0004] In actual applications, hot air, infrared or ultraviolet drying methods are usually used, and the drying time or temperature is preset to achieve the purpose of drying the inkjet coating attached to the cardboard. However, depending on the complexity of the printed pattern, the thickness of the inkjet coating varies, and the naked eye cannot clearly judge whether the inkjet coating is completely dried. If the inkjet coating is not completely dry, the following phenomena will occur in the subsequent oil spraying process: the ink diffuses due to the solvent effect of the oil, affecting the clarity and quality of the printed pattern; the ink and oil may contain different chemical components, and the undried ink mixed with the oil will cause color changes or mixing, which will affect the adhesion of the ink to the carton, and then affect the wear resistance and durability of the ink, thereby affecting the quality of the final printing. Summary of the invention

[0005] In order to ensure that the inkjet coating reaches a completely dry state before the inkjet process is performed, the present application provides a simple inkjet manufacturing process and system that can improve printing quality.

[0006] In the first aspect, the present application provides a simple inkjet manufacturing process, which adopts the following technical solution:

[0007] A simple inkjet manufacturing process comprises the following steps:

[0008] Acquire a file to be printed, and acquire printing pattern unit data based on the printing file;

[0009] Inputting the printing pattern unit data into a preset pattern processing model to obtain the ink layer thickness of the paperboard printing image;

[0010] Analyze the quality of the ink layer thickness to obtain the quality analysis result;

[0011] According to the quality analysis results, the printed image of the cardboard is subjected to image cutting processing to obtain local printed images in different thickness ranges;

[0012] According to the local printed images in different thickness ranges, at least five sample points are extracted for classification and ink layer wear resistance classification test, and the density values ​​of the five sample points are recorded respectively: the test heads of the five sample points rub the ink layer with the same force respectively, and at the same time, the drying humidity, temperature and time are quantitatively measured, and the friction ink marks on the surface of the sample are observed to obtain the ink mark analysis;

[0013] Determine whether to conduct the next ink layer wear resistance classification test according to the ink mark analysis, calculate the density value of the sample point with the maximum ink layer thickness; record the drying temperature, drying humidity, and drying time of the sample point with the maximum ink layer thickness during the ink layer wear resistance classification test; calculate the solvent absorption rate of the ink on the paperboard of the sample point with the maximum ink layer thickness;

[0014] According to the ink mark analysis, determine the drying temperature, drying humidity, and drying time when there is no friction ink mark on the sample surface, and perform ink printing, drying, and oil spraying on the cartons until the printing of batch cartons is completed.

[0015] By adopting the above technical scheme, compared with the prior art, based on the printing of inks with different thicknesses on the printed patterns on the cardboard, the present application creates the same scene but different temperature environments to find out the relationship between factors such as the ink density of a single color, the ink density of superimposed colors, the humidity value of the cardboard itself, the solvent absorption rate of the ink attached to the cardboard, the ink layer thickness, the humidity of the drying environment, the drying environment temperature, and the drying time and the drying effect. Through the ink mark wear resistance grading test, the ink mark analysis is obtained, and finally the best drying conditions are found, which can pave the way for the subsequent batch printing, drying, and oil spraying processes of cartons, reduce the situation where the ink layer is not dry due to unclear judgment by the naked eye of the production personnel, resulting in the mixing of ink and oil. During the printing process of the carton, the calibration process of various parameters of the drying conditions is more standardized, ensuring that the inkjet coating reaches a completely dry state before the oil spraying process is carried out, so as to achieve the purpose of improving the printing quality of the carton.

[0016] Preferably, according to the ink mark analysis, it specifically includes:

[0017] According to the analysis of ink marks, if any sample point has friction ink marks, change the value of the drying temperature, take another paperboard sample, extract the sample point where the friction marks appeared last time from the paperboard printing image, repeat the ink layer wear resistance classification test, and once again determine whether to conduct the next ink layer wear resistance classification test based on the ink mark analysis;

[0018] According to the ink mark analysis, if there is no friction ink mark on the sample point, record the drying temperature, drying humidity, drying time, and density value of the sample point with the maximum ink layer thickness.

[0019] By adopting the above-mentioned technical scheme, changing the drying temperature values ​​one by one, and repeating the ink layer wear resistance grading test, the temperature critical point that causes the appearance of ink marks can be accurately found, which is helpful to determine the optimal drying temperature and improve the stability and controllability of the entire inkjet manufacturing process, thereby effectively improving the optimization accuracy of process parameters and providing reliable data support for subsequent batch production; in the case where no friction ink marks appear on the sample points, the drying temperature, drying humidity, drying time and density values ​​of the sample points with the maximum ink layer thickness are recorded in detail to provide the best drying conditions for subsequent batch drying of cartons. This application helps to achieve standardization of the inkjet manufacturing process by recording and optimizing key process parameters, ensuring that consistent quality standards are achieved for each production, allowing production personnel to set and adjust process parameters more quickly, thereby reducing preparation time before production and adjustment time during production, and improving overall production efficiency.

[0020] Preferably, when calculating the density value of the sample point with the maximum ink layer thickness, it specifically includes:

[0021] If the printed image on the paperboard is a printed image of a single color, the density value of the ink of the sample point is measured by a densitometer to obtain the density of the ink of the single color;

[0022] If the cardboard printing image is a printing image with multiple colors superimposed, the color quality of the printing colors is first analyzed according to the ink layer thickness of each color range of the printing colors of the cardboard printing image to obtain different color quality analysis results of the sample points;

[0023] According to the color quality analysis result, the superimposed colors of the sample points are cut, and the density value of the color filter of each color ink is measured by a densitometer to obtain the density of the single-color ink;

[0024] According to the corresponding ink layer thickness obtained after the colors are superimposed, the product of the single-color ink density and the corresponding ink layer thickness is calculated to obtain the ink density of the multiple colors superimposed.

[0025] By adopting the above technical solution, for printed images printed in a single color, there is no need for complex color cutting or color analysis. The density value of the sample ink can be directly measured by a densitometer, which can accurately obtain the density of the ink and provide accurate data support for subsequent process control.

[0026] For printed images with multiple colors superimposed, the color quality is first analyzed based on the ink layer thickness of each color gamut. Then, the superimposed colors are cut and the filter density value of each color ink is measured using a densitometer. This helps to accurately understand the mutual influence of different colors in the superposition process and accurately divide the different colors to ensure that the density of each color ink can be accurately measured, providing important parameters for subsequent process control. Based on the ink layer thickness obtained after color superposition, the product of the single-color ink density and the corresponding ink layer thickness is calculated to obtain the ink density of multiple superimposed colors.

[0027] Preferably, calculating the solvent absorption rate of the ink at the sample point with the maximum ink layer thickness on the paperboard specifically includes:

[0028] If the printed image on the cardboard is a single-color printed image, obtain the humidity value of the cardboard before inkjet printing.

[0029] The paperboard humidity value at the sample point of the maximum ink layer thickness is calculated, and the difference between the two is calculated to obtain the ink solvent absorption rate of a single color.

[0030] By adopting the above technical solution, by obtaining the humidity value of the paperboard before inkjet printing and the humidity value of the paperboard at the sample point of the maximum ink layer thickness, and calculating the difference between the two, the ink solvent absorption rate of a single color can be accurately obtained, thereby providing accurate data support for evaluating the absorption performance of the ink on the paperboard. The ink solvent absorption rate is convenient for production personnel to adjust and optimize relevant parameters in the inkjet manufacturing process.

[0031] Preferably, calculating the solvent absorption rate of the ink at the sample point with the maximum ink layer thickness on the paperboard specifically includes:

[0032] If the printed image on the cardboard is a printed image with multiple colors, obtain the humidity value of the cardboard before inkjet printing, obtain the humidity value of the cardboard after each color of ink is added to the sample point, and construct a humidity change curve corresponding to the ink usage difference;

[0033] According to the humidity change curve and color superposition, the corresponding ink layer thickness is obtained, and the ink solvent absorption rate of multiple colors is calculated.

[0034] By adopting the above technical solution, for printed images with multiple colors, by obtaining the humidity value of the cardboard before inkjet printing and the humidity value of the cardboard after each color of ink is added, a humidity change curve corresponding to the ink usage difference is constructed, which can more comprehensively evaluate the absorption performance of different color inks on the cardboard, providing an important basis for optimizing multi-color printing.

[0035] Based on the humidity change curve and the ink layer thickness obtained after color superposition, the ink solvent absorption rate of multiple colors can be accurately calculated, so that production personnel can more accurately understand the absorption of ink on the cardboard, providing strong support for subsequent process adjustments; this application aims at printing images with multiple colors superimposed, and by comprehensively considering the absorption of different color inks, it improves the adaptability and flexibility of the process to complex printing needs.

[0036] Preferably, the drying temperature of the maximum ink layer thickness is calculated according to the ink solvent absorption rate of a single color or the ink solvent absorption rate of multiple colors, based on the cardboard humidity value at the sample point of the maximum ink layer thickness, the drying time, and the density value of the sample point of the maximum ink layer thickness.

[0037] By adopting the above technical solution, the accurately calculated drying temperature can ensure that the ink layer is dried at the optimal temperature, thereby improving the drying efficiency and shortening the production cycle. At the same time, the appropriate drying temperature helps to reduce problems such as uneven drying and ink layer cracking caused by excessively high or low temperatures, improve the drying quality of the ink layer, reduce energy consumption to a certain extent, and reduce waste heat emissions, thereby achieving the environmental protection goal of energy conservation and emission reduction.

[0038] Preferably, based on the local printed images in different thickness ranges, the ink mark analysis specifically includes:

[0039] Ⅰ. There is no friction ink mark on the surface of the sample point with the maximum ink layer thickness, and there is no ink mark on the test head;

[0040] Ⅱ. The surface of the sample with the maximum ink layer thickness has friction ink marks, the depth of which is less than 1mm, and there are no friction marks on the sample of the secondary ink layer or the test head;

[0041] Ⅲ. The surface of the sample with the maximum ink layer thickness has color falling off, the depth of the friction ink mark is greater than 1mm, and there are friction marks on the sample of the secondary ink layer or the test head;

[0042] IV. The sample surface of the sample with the maximum ink layer thickness has color falling off, and the depth of the friction ink mark is greater than 1mm. The sample point of the secondary ink layer or the test head has friction marks, and the depth of the friction ink mark is greater than 1mm;

[0043] Ⅴ. The surface pattern and characters of the sample with the maximum ink layer thickness are blurred, the depth of the friction ink mark is greater than 1mm, the sample of the secondary ink layer has color loss or the test head is covered with friction marks, the depth of the friction ink mark is greater than 1mm, and the cardboard at the sample of the secondary ink layer is damaged;

[0044] For ink mark analysis, the color change level of the sample point and the color staining level of the test head should be determined at the same time, and the one with the higher wear resistance level should be used as the judgment result; Level I indicates that the drying effect of the carton is the best, and Level V indicates that the drying effect of the carton is the worst.

[0045] By adopting the above technical solution, through careful observation and analysis of the ink marks, the drying effect of the cartons can be judged, so that production personnel can continuously improve the production process, and finally find out the drying temperature suitable for the sample point with the maximum ink layer thickness in the printed image, reduce problems such as uneven drying and ink layer cracking caused by excessively high or low temperature, and help improve the drying quality of the ink layer, so as to facilitate the subsequent batch drying of cartons and improve the printing quality of cartons. By classifying the ink marks, this application can understand the drying effect of the cartons in advance, which helps to improve the qualified rate of products.

[0046] Preferably, based on whether the cardboard printed image contains a printed image of a single color or a printed image with multiple colors superimposed, the ink density D0 of the sample point with the maximum ink layer thickness before the ink layer wear resistance test and the ink density D1 of the sample point with the maximum ink layer thickness after the ink layer wear resistance test are obtained respectively; the wear resistance performance A=(D0 / D1)x100% is calculated, and the larger the value of the wear resistance performance A is, the better the wear resistance of the carton ink and the better the drying effect is. Conversely, the smaller the value is, the worse the wear resistance of the carton ink and the worse the drying effect is.

[0047] By adopting the above technical solution and calculating the wear resistance A, the wear resistance and drying effect of the carton ink can be evaluated in a quantitative manner, so that the water absorption of the carton can be understood more intuitively, and the drying temperature can be adjusted accordingly. This application understands the ink mark situation through precise measurement of the wear resistance, and further improves the wear resistance by adjusting parameters such as the drying temperature and time, and finds the drying temperature suitable for the sample point with the maximum ink layer thickness in the printed image, so as to facilitate the subsequent batch drying of cartons and improve the printing quality of the cartons.

[0048] Preferably, when the cardboard printed image is a printed image of multiple colors, based on the color analysis result, the effective color proportion of the printed color corresponding to each pixel of the sample point is calculated;

[0049] The color filters of red, yellow, blue and other primary color inks are used as the basic colors. During the ink printing process of the carton, the basic colors are printed first. When the printing color is missing, the three primary colors of red, yellow and blue are superimposed and complemented, or any of the three primary colors is superimposed and complemented with other primary color inks to obtain the printed color image.

[0050] By adopting the above-mentioned technical scheme and calculating the effective color proportion of the printing color corresponding to each pixel, it is possible to achieve accurate management of the distribution of each color in the multi-color printed image, which is helpful to improve the color accuracy and layering of the printed pattern; and, in the present application, basic colors are used for printing first. When a printing color is missing, the required color is obtained by superimposing and complementing the three primary colors or other primary color inks. Such operation can reduce the number of color conversions in the printing process, improve printing efficiency, and expand the expression range of printed colors to a certain extent, so that each color can be reasonably used, reducing cost waste, while meeting the printing needs of more complex patterns.

[0051] In a second aspect, the present application provides a simple inkjet manufacturing system, which is applied to the inkjet manufacturing process and adopts the following technical solutions:

[0052] A simple inkjet manufacturing system, comprising:

[0053] An image data acquisition module, used to acquire the ink layer thickness of the paperboard printing image;

[0054] The color quality analysis module analyzes the quality of the printed image according to the ink layer thickness of the printed image on the paperboard to obtain the quality analysis result;

[0055] The ink layer wear resistance grading test module performs ink layer wear resistance grading tests on five sample points according to the local printed images in different thickness ranges to obtain ink mark analysis results;

[0056] Color overlay module, which matches the basic colors according to the ink layer thickness and color quality of each color range of the printed color of the cardboard printing image;

[0057] An inkjet module, spraying ink based on printing pattern unit data;

[0058] Drying module: Determine the drying temperature, drying humidity and drying time of the carton based on the ink mark analysis;

[0059] The oil spraying module performs fixed-point oil spraying based on the ink printed pattern on the carton that has completed the drying process.

[0060] By adopting the above technical solution, the image data acquisition module can quickly and accurately obtain the ink layer thickness data of the cardboard printing image, providing basic data support for the subsequent color quality analysis and ink layer wear resistance grading test; then, based on the acquired ink layer thickness data, the quality of the printed image is deeply analyzed to ensure that the printing quality meets the expected standards, which helps to timely discover and deal with quality problems in the printing process and improve the overall printing quality; then, by performing graded wear resistance tests on local printed images in different thickness ranges, the wear resistance of the ink layer can be more accurately evaluated, which helps to guide subsequent drying and oil spraying treatments and ensure the wear resistance and durability of the carton during use; then, according to the cardboard printing image The ink layer thickness and color quality of each color domain of the printed color are intelligently adjusted to improve the color accuracy and layering of the printed pattern, and to expand the expression range of the printed color to a certain extent; then, based on the precise printing pattern unit data, high-precision ink spraying is achieved to improve the clarity and resolution of the printed pattern; finally, the drying temperature, humidity and time are intelligently determined according to the ink mark analysis to ensure that the ink layer is dried under the best conditions, so as to achieve the purpose of improving the drying efficiency and ensuring the drying quality of the ink layer, reduce the quality fluctuation during the drying process, and perform fixed-point oil spraying on the cartons that have completed the drying process, which can further enhance the wear resistance and waterproof performance of the cartons, and improve the appearance texture and service life of the cartons.

[0061] In summary, the present application includes at least one of the following beneficial technical effects:

[0062] 1. Compared with the prior art, based on the printing of inks with different thicknesses on the printed patterns on the cardboard, the present application creates the same scene but different temperature environments to find out the relationship between the ink density of a single color, the ink density of superimposed colors, the humidity value of the cardboard itself, the solvent absorption rate of the ink attached to the cardboard, the ink layer thickness, the humidity of the drying environment, the drying environment temperature, the drying time and other factors and the drying effect. Through the ink mark wear resistance classification test, the ink mark analysis is obtained, and finally the best drying conditions are found, which can pave the way for the subsequent batch printing, drying and oil spraying processes of the cartons, and reduce the situation where the ink layer is not dry due to unclear judgment by the naked eye of the production personnel, resulting in the mixing of ink and oil. During the printing process of the cartons, the calibration process of various parameters of the drying conditions is more standardized, ensuring that the inkjet coating reaches a completely dry state before the oil spraying process is carried out, so as to achieve the purpose of improving the printing quality of the cartons;

[0063] 2. Through careful observation and analysis of ink marks, the drying effect of cartons can be judged, so that production personnel can continuously improve the production process, and finally find out the drying temperature suitable for the sample point with the maximum ink layer thickness in the printed image, so as to reduce problems such as uneven drying and ink layer cracking caused by too high or too low temperature, which is helpful to improve the drying quality of the ink layer, so as to facilitate the subsequent batch drying of cartons and improve the printing quality of cartons. This application can understand the drying effect of cartons in advance by grading the ink marks, which is helpful to improve the qualified rate of products;

[0064] 3. Calculating the effective color ratio of the printed color corresponding to each pixel can achieve accurate management of the distribution of each color in the multi-color printed image. In addition, in the present application, the basic color is used for printing first. When the printed color is missing, the required color is obtained by superimposing and complementing the three primary colors or other primary color inks. This operation can reduce the number of color conversions in the printing process, improve printing efficiency, and expand the expression range of printed colors to a certain extent, so that each color can be reasonably used, reducing cost waste, and meeting the printing needs of more complex patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a flow chart of a simple inkjet manufacturing process in an embodiment of the present application.

[0066] Figure 2 It is a schematic diagram of ink mark analysis in a simple inkjet manufacturing process in an embodiment of the present application.

[0067] Figure 3 This is a judgment flow chart for obtaining the optimal drying conditions for paperboard in a simple inkjet manufacturing process in an embodiment of the present application.

[0068] Figure 4 This is a flow chart for calculating ink density in a simple inkjet manufacturing process in an embodiment of the present application.

[0069] Figure 5 This is a flow chart for calculating the ink solvent absorption rate in a simple inkjet manufacturing process in an embodiment of the present application.

[0070] Figure 6 It is a principle block diagram of a simple inkjet manufacturing system in an embodiment of the present application. DETAILED DESCRIPTION

[0071] The following is combined with Figure 1-6 This application is described in further detail.

[0072] In a first aspect, the embodiments of the present application disclose a simple inkjet manufacturing process.

[0073] Reference Figure 1, a simple inkjet manufacturing process, comprising the following steps:

[0074] S1: Obtain a file to be printed, and obtain printing pattern unit data based on the printing file.

[0075] Specifically, in the process of printing the cartons, the file to be printed is obtained by inputting the digital file into the digital printing device, and the printing pattern unit data and the corresponding printing typesetting number parameters are obtained in the printing file.

[0076] S2: Input the printing pattern unit data into a preset pattern processing model to obtain the ink layer thickness of the paperboard printing image.

[0077] S3: Analyze the quality of the ink layer thickness to obtain a quality analysis result.

[0078] S4: According to the quality analysis result, the printed image of the paperboard is subjected to image cutting processing to obtain partial printed images in different thickness ranges.

[0079] Specifically, the printing pattern unit data is input into a preset pattern processing model, and the pattern processing model is used to perform pattern preprocessing on the printing pattern unit data. The printing pattern unit data can be discretely processed to obtain sample point data corresponding to the pattern to be printed, identify and judge whether the printed image is a single-color printed image or a printed image with multiple colors superimposed, obtain the ink layer thickness of the sample points in each color domain in the printed image on the carton paperboard, and then analyze the quality of the ink layer thickness to obtain a quality analysis result. According to the quality analysis result, the paperboard printed image is subjected to image cutting processing to obtain local printed images in different thickness ranges, and the local printed image is composed of at least one sample point data, so that the digital printing device performs digital printing according to the local printed image.

[0080] S5: According to the local printed images in different thickness ranges, at least five sample points are extracted for grading and ink layer wear resistance grading test, and the density values ​​of the five sample points are recorded respectively: the test heads of the five sample points rub the ink layer with the same force respectively, and at the same time, the drying humidity, temperature and time are quantified, and the friction ink marks on the surface of the sample are observed to obtain the ink mark analysis.

[0081] Specifically, in this application, the five sample points extracted are the five sample points with the largest ink layer thickness in the entire printed image. In this implementation process, the camera on the digital printing device can be used to quickly obtain the target sample points on the printed pattern based on the printing layout parameters, that is, the five sample points on the paperboard, and the ink layer thickness of the five sample points increases or decreases in sequence. In the process of conducting the ink layer wear resistance grading test, based on the local printed images in different thickness ranges, refer to Figure 2 The ink trace analysis includes:

[0082] Ⅰ. There is no friction ink mark on the surface of the sample point with the maximum ink layer thickness, and there is no ink mark on the test head;

[0083] Ⅱ. The surface of the sample with the maximum ink layer thickness has friction ink marks, the depth of which is less than 1mm, and there are no friction marks on the sample of the secondary ink layer or the test head;

[0084] Ⅲ. The surface of the sample with the maximum ink layer thickness has color falling off, the depth of the friction ink mark is greater than 1mm, and there are friction marks on the sample of the secondary ink layer or the test head;

[0085] IV. The sample surface of the sample with the maximum ink layer thickness has color falling off, and the depth of the friction ink mark is greater than 1mm. The sample point of the secondary ink layer or the test head has friction marks, and the depth of the friction ink mark is greater than 1mm;

[0086] Ⅴ. The surface pattern and characters of the sample with the maximum ink layer thickness are blurred, the depth of the friction ink mark is greater than 1mm, the sample of the secondary ink layer has color loss or the test head is covered with friction marks, the depth of the friction ink mark is greater than 1mm, and the cardboard at the sample of the secondary ink layer is damaged;

[0087] For ink mark analysis, the color change level of the sample point and the color staining level of the test head should be determined at the same time, and the one with the higher wear resistance level should be used as the judgment result; Level I indicates that the drying effect of the carton is the best, and Level V indicates that the drying effect of the carton is the worst.

[0088] More specifically, during the processing step S5, based on whether the cardboard printed image includes a single-color printed image or a printed image with multiple colors superimposed, the ink density D0 of the sample point with the maximum ink layer thickness before the ink layer wear resistance test and the ink density D1 of the sample point with the maximum ink layer thickness after the ink layer wear resistance test are obtained respectively; the wear resistance performance A=(D0 / D1)x100% is calculated, and the larger the value of the wear resistance performance A is, the better the wear resistance of the carton ink is, and the better the drying effect is. Conversely, the smaller the value is, the worse the wear resistance of the carton ink is, and the worse the drying effect is.

[0089] S6: Determine whether to conduct the next ink layer wear resistance classification test according to the ink mark analysis. The determination means are as described in step 5. Figure 3 According to the ink mark analysis, if any sample point has friction ink marks, simply change the drying temperature value, take another cardboard sample, extract the sample point where the friction marks appeared last time from the cardboard printing image, repeat the ink layer wear resistance grading test, and once again determine whether to conduct the next ink layer wear resistance grading test based on the ink mark analysis; if no sample point has friction ink marks, record the drying temperature, drying humidity, drying time, and density value of the sample point with the maximum ink layer thickness.

[0090] In the present application, the preferred test head material is provided as a tool with soft performance characteristics such as friction paper, friction cotton, or glue. During the process of rubbing the cardboard sample with force, the cardboard sample is not allowed to be damaged, and the color change level of the sample point and the color staining level of the test head can be clearly reflected. The production personnel can judge the drying effect of the carton through careful observation and analysis of the ink marks, so as to continuously improve the production process.

[0091] In the process of repeated ink layer wear grading test, based on the sample point where the friction mark appears for the first time, the sample point with a higher ink layer thickness is subjected to friction test, other influencing factors are quantified, the temperature is gradually increased, and the steps are repeated and the ink layer thickness is increased. According to the information of drying temperature and ink layer thickness, the relationship between the two is analyzed, and the relationship data components are presented as a relationship mapping table, and the relationship reflection table is stored in the storage module of the digital printing device. The storage module is part of the pattern processing model referred to in step 2, and can quickly obtain the printing layout parameters when the same type of printing data is obtained next time, and give reminders of parameters such as drying temperature, drying humidity, and drying time, thereby reducing the number of repeated tests and improving the efficiency of digital printing.

[0092] Based on the relationship mapping table, the density value of the sample point with the maximum ink layer thickness is calculated; the drying temperature, drying humidity, and drying time of the sample point with the maximum ink layer thickness during the ink layer wear resistance grading test are recorded; and the solvent absorption rate of the ink on the paperboard of the sample point with the maximum ink layer thickness is calculated.

[0093] This application changes the value of the drying temperature one by one and repeats the ink layer wear resistance classification test. When there is no friction ink mark on the sample point, the drying temperature, drying humidity, drying time and the density value of the sample point with the maximum ink layer thickness are recorded in detail. The temperature critical point that causes the ink mark to appear can be accurately found. By calculating the wear resistance A, the wear resistance and drying effect of the carton ink can be evaluated in a quantitative manner, which helps to determine the optimal drying temperature and provide reliable data support for subsequent batch production, reducing problems such as uneven drying and ink layer cracking caused by excessively high or low temperatures, and helping to improve the drying quality of the ink layer, so as to facilitate the subsequent batch drying of cartons. In this process, by recording and optimizing key process parameters, it helps to achieve the standardization of the inkjet manufacturing process, ensure that each production can meet consistent quality standards, and enable production personnel to set and adjust process parameters more quickly, thereby reducing the preparation time before production and the adjustment time during production, improving overall production efficiency, and helping to improve the product qualification rate.

[0094] During the processing step S6, refer to Figure 4 , when calculating the density value of the sample point with the maximum ink layer thickness, there are two specific cases:

[0095] First, if the printed image on the cardboard is a single-color printed image, the density value of the ink at the sample point is measured by a densitometer to obtain the density of the single-color ink.

[0096] The second method is that if the printed image on the cardboard is a printed image with multiple colors superimposed, the color quality of the printed colors is first analyzed according to the ink layer thickness of each color domain of the printed colors of the cardboard printed image, and different color analysis results of the sample points are obtained. Then, according to the color quality analysis results, the superimposed colors of the sample points are cut, and the density value of the color filter of each color ink is measured by a densitometer to obtain the density of the single-color ink. Finally, according to the corresponding ink layer thickness obtained after the color superposition, the product of the single-color ink density and the corresponding ink layer thickness is calculated to obtain the ink density of multiple colors superimposed. Such operation helps to accurately understand the mutual influence of different colors in the superposition process, and accurately divides different colors to ensure that the density of each color ink can be accurately measured, which provides important parameters for subsequent process control. According to the ink layer thickness obtained after the color superposition, the product of the single-color ink density and the corresponding ink layer thickness is calculated to obtain the ink density of multiple colors superimposed.

[0097] During the processing step S6, refer to Figure 5 , when calculating the solvent absorption rate of the ink at the sample point with the maximum ink layer thickness on the paperboard, there are two specific cases:

[0098] First, if the printed image on the cardboard is a single-color printed image, obtain the humidity value of the cardboard before inkjet printing and the cardboard humidity value at the sample point of the maximum ink layer thickness, calculate the difference between the two, and obtain the single-color ink solvent absorption rate.

[0099] The ink solvent absorption rate of a single color can provide accurate data support for evaluating the absorption performance of ink on paperboard. The ink solvent absorption rate can help production personnel adjust and optimize relevant parameters in the inkjet manufacturing process, such as ink formula, inkjet speed and pressure, so as to further improve printing quality and efficiency.

[0100] The second method is to obtain the humidity value of the cardboard before inkjet printing if the printed image on the cardboard is a printed image of multiple colors, obtain the humidity value of the cardboard after each color of ink is added to the sample point, and construct a humidity change curve corresponding to the ink usage difference; then, according to the humidity change curve and the color superposition, the corresponding ink layer thickness is obtained, and the ink solvent absorption rate of multiple colors is calculated.

[0101] Based on the humidity change curve and the ink layer thickness obtained after color superposition, the ink solvent absorption rate of multiple colors can be accurately calculated, so that production personnel can more accurately understand the absorption of ink on the cardboard, providing strong support for subsequent process adjustments; this application aims at printing images with multiple colors superimposed, and by comprehensively considering the absorption of different color inks, it improves the adaptability and flexibility of the process to complex printing needs.

[0102] During the processing step S6, it is also necessary to consider the influence of the humidity of the cardboard itself on the drying effect. At the same time, according to the information of the drying temperature and the ink layer thickness, based on the relationship mapping table between the two and the humidity change curve corresponding to the ink usage difference, it can be judged that the water absorption rate of the cardboard is proportional to the total solvent content of the ink, but when the water absorption of the cardboard reaches saturation, the cardboard stops absorbing water, and the water absorption rate of the cardboard has little to do with the number of different colors. Therefore, according to the solvent absorption rate of a single color ink or the solvent absorption rate of multiple colors ink, the drying temperature of the maximum ink layer thickness can be calculated based on the cardboard humidity value at the sample point of the maximum ink layer thickness, the drying time, and the density value of the sample point of the maximum ink layer thickness.

[0103] The present application can ensure that the ink layer is dried at the optimal temperature by accurately calculating the drying temperature, thereby improving the drying efficiency and shortening the production cycle. At the same time, the appropriate drying temperature helps to reduce problems such as uneven drying and ink layer cracking caused by excessively high or low temperatures, improve the drying quality of the ink layer, reduce energy consumption to a certain extent, and reduce waste heat emissions, thereby achieving the environmental protection goal of energy conservation and emission reduction.

[0104] In order to save production costs, when the printed image on the cardboard is a printed image of multiple colors, based on the color analysis results, the effective color ratio of the printed color corresponding to each pixel of the sample is calculated to achieve accurate management of the distribution of each color in the multi-color printed image, which helps to improve the color accuracy of the printed pattern; the color filters of red, yellow, blue, and other primary color inks are used as basic colors. During the ink printing process of the carton, the basic colors are printed first. When the printing color is missing, the image of the printed color is obtained by superimposing and complementing the three primary colors of red, yellow, and blue, or by superimposing and complementing any of the three primary colors with other primary color inks. This operation can reduce the number of color conversions during the printing process, improve printing efficiency, and expand the expression range of printed colors to a certain extent, so that each color can be reasonably used, reduce cost waste, and meet the printing needs of more complex patterns.

[0105] S7: According to the ink mark analysis, determine the drying temperature, drying humidity, and drying time when there is no friction ink mark on the sample surface, and perform ink printing, drying, and oil spraying on the cartons until the printing of batch cartons is completed.

[0106] In actual application, the present application first obtains the file to be printed and extracts the printing pattern unit data, which provides accurate basic data for subsequent printing work, helps to improve the accuracy and consistency of the printed pattern, and is the starting point of the entire process; then the printing pattern unit data is input into a preset pattern processing model to obtain the ink layer thickness of the cardboard printing image, and through image processing technology, provides key parameters for subsequent ink layer quality analysis and image cutting processing to ensure the controllability of printing quality; by analyzing the quality of the ink layer thickness, and performing image cutting processing on the cardboard printing image according to the analysis results, local printed images in different thickness ranges are obtained, so that the ink layer thickness of each local area can be identified and recorded; by controlling the drying humidity, temperature, time, and friction force, the ink layer wear resistance grading test is performed on the local printed images in different thickness ranges, and the density value of the sample point is recorded and the friction ink marks on the surface of the sample are observed, so as to provide important data for evaluating the wear resistance of the ink layer, so as to further ensure the quality of the ink layer.

[0107] Then, based on the ink mark analysis, determine whether to conduct the next ink layer wear resistance grading test. Through multiple verifications, the relevant parameters of the sample point with the maximum ink layer thickness can be obtained more accurately, thereby providing the best drying conditions for the carton. Finally, determine the best drying temperature, drying humidity and drying time based on the ink mark analysis, and carry out the printing, drying and oil spraying processes of the carton. This step is the finishing stage of the entire process. By precisely controlling the drying conditions and processing procedures, the printing quality and appearance of the final product are ensured.

[0108] Compared with the prior art, based on the printing of inks with different thicknesses on the printed patterns on the cardboard, the present application creates the same scene but different temperature environments to find out the relationship between factors such as the ink density of a single color, the ink density of superimposed colors, the humidity value of the cardboard itself, the solvent absorption rate of the ink attached to the cardboard, the ink layer thickness, the humidity of the drying environment, the drying environment temperature, and the drying time and the drying effect. Through the ink mark wear resistance grading test, the ink mark analysis is obtained, and finally the best drying conditions are found, which can pave the way for the subsequent batch printing, drying, and oil spraying processes of the cartons, and reduce the situation where the ink layer is not dry due to unclear judgment by the naked eye of the production personnel, resulting in the mixing of ink and oil. During the printing process of the cartons, the calibration process of various parameters of the drying conditions is more standardized, ensuring that the inkjet coating reaches a completely dry state before the oil spraying process is carried out, thereby achieving the purpose of improving the printing quality of the cartons.

[0109] In a second aspect, the embodiments of the present application also disclose a simple inkjet manufacturing system for use in inkjet manufacturing processes.

[0110] Reference Figure 6 , a simple inkjet manufacturing system, comprising:

[0111] The image data acquisition module is used to acquire the ink layer thickness of the paperboard printing image.

[0112] The color quality analysis module analyzes the quality of the printed image according to the ink layer thickness of the printed image on the paperboard to obtain the quality analysis result.

[0113] The ink layer wear resistance grading test module performs ink layer wear resistance grading tests on five sample points according to local printed images in different thickness ranges to obtain ink mark analysis.

[0114] The color overlay module matches the basic colors according to the ink layer thickness and color quality of each color range of the printed color of the cardboard printing image.

[0115] The inkjet module sprays ink based on the printing pattern unit data.

[0116] Drying module: Determine the drying temperature, drying humidity and drying time of the carton based on the ink mark analysis.

[0117] The oil spraying module performs fixed-point oil spraying based on the ink printed pattern on the carton that has completed the drying process.

[0118] The image data acquisition module can quickly and accurately obtain the ink layer thickness data of the cardboard printing image, providing basic data support for the subsequent color quality analysis and ink layer wear resistance grading test; then, based on the acquired ink layer thickness data, the quality of the printed image is deeply analyzed to ensure that the printing quality meets the expected standards, which helps to timely discover and deal with quality problems in the printing process and improve the overall printing quality; then, by performing graded wear resistance tests on local printed images in different thickness ranges, the wear resistance of the ink layer can be more accurately evaluated, which helps to guide the subsequent drying and oil spraying treatments and ensure the wear resistance and durability of the carton during use; then, according to the printing color of the cardboard printing image, each The ink layer thickness and color quality of the color gamut are intelligently adjusted to improve the color accuracy and layering of the printed pattern, and to expand the expression range of printed colors to a certain extent; then, based on the precise printing pattern unit data, high-precision ink spraying is achieved to improve the clarity and resolution of the printed pattern; finally, the drying temperature, humidity and time are intelligently determined according to the ink mark analysis to ensure that the ink layer is dried under the best conditions, so as to achieve the purpose of improving drying efficiency and ensuring the drying quality of the ink layer, reducing quality fluctuations during the drying process, and performing point oil spraying on the cartons that have completed the drying process, which can further enhance the wear resistance and waterproof performance of the cartons, and improve the appearance texture and service life of the cartons.

[0119] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A simple inkjet manufacturing process, characterized in that: The following steps are involved: Acquire a file to be printed, and acquire printing pattern unit data based on the printing file; Inputting the printing pattern unit data into a preset pattern processing model to obtain the ink layer thickness of the paperboard printing image; Analyze the quality of the ink layer thickness to obtain the quality analysis result; According to the quality analysis results, the printed image of the cardboard is subjected to image cutting processing to obtain local printed images in different thickness ranges; According to the local printed images in different thickness ranges, at least five sample points are extracted for classification and ink layer wear resistance classification test, and the density values ​​of the five sample points are recorded respectively: the test heads of the five sample points rub the ink layer with the same force respectively, and at the same time, the drying humidity, temperature and time are quantitatively measured, and the friction ink marks on the surface of the sample are observed to obtain the ink mark analysis; Determine whether to conduct the next ink layer wear resistance grading test based on the ink mark analysis, and calculate the density value of the sample point with the maximum ink layer thickness; record the drying temperature, drying humidity, and drying time of the sample point with the maximum ink layer thickness during the ink layer wear resistance grading test; calculate the solvent absorption rate of the ink on the paperboard of the sample point with the maximum ink layer thickness; determine the drying temperature, drying humidity, and drying time when there is no friction ink mark on the surface of the sample point based on the ink mark analysis, and perform ink printing patterns, drying treatment, and oil spraying processes on the cartons until the printing of batch cartons is completed.

2. A simple inkjet manufacturing process according to claim 1, characterized in that: According to the analysis of ink marks, it includes: According to the analysis of ink marks, if any sample point has friction ink marks, change the value of the drying temperature, take another paperboard sample, extract the sample point where the friction marks appeared last time from the paperboard printing image, repeat the ink layer wear resistance classification test, and once again determine whether to conduct the next ink layer wear resistance classification test based on the ink mark analysis; According to the ink mark analysis, if there is no friction ink mark on the sample point, record the drying temperature, drying humidity, drying time, and density value of the sample point with the maximum ink layer thickness.

3. A simple inkjet manufacturing process according to claim 2, characterized in that: When calculating the density value of the sample point with the maximum ink layer thickness, it specifically includes: If the printed image on the paperboard is a printed image of a single color, the density value of the ink of the sample point is measured by a densitometer to obtain the density of the ink of the single color; If the cardboard printing image is a printing image with multiple colors superimposed, the color quality of the printing colors is first analyzed according to the ink layer thickness of each color range of the printing colors of the cardboard printing image to obtain different color quality analysis results of the sample points; According to the color quality analysis result, the superimposed colors of the sample points are cut, and the density value of the color filter of each color ink is measured by a densitometer to obtain the density of the single-color ink; According to the corresponding ink layer thickness obtained after the colors are superimposed, the product of the single-color ink density and the corresponding ink layer thickness is calculated to obtain the ink density of the multiple colors superimposed.

4. A simple inkjet manufacturing process according to claim 3, characterized in that: When calculating the solvent absorption rate of the ink on the paperboard at the sample point with the maximum ink layer thickness, it specifically includes: If the printed image on the cardboard is a single-color printed image, obtain the humidity value of the cardboard before inkjet printing and the cardboard humidity value at the sample point of the maximum ink layer thickness, calculate the difference between the two, and obtain the single-color ink solvent absorption rate.

5. A simple inkjet manufacturing process according to claim 1, characterized in that: When calculating the solvent absorption rate of the ink on the paperboard at the sample point with the maximum ink layer thickness, it specifically includes: If the printed image on the cardboard is a printed image with multiple colors, obtain the humidity value of the cardboard before inkjet printing, obtain the humidity value of the cardboard after each color of ink is added to the sample point, and construct a humidity change curve corresponding to the ink usage difference; According to the humidity change curve and color superposition, the corresponding ink layer thickness is obtained, and the ink solvent absorption rate of multiple colors is calculated.

6. A simple inkjet manufacturing process according to claim 4, characterized in that: The drying temperature of the maximum ink layer thickness is calculated according to the ink solvent absorption rate of a single color or the ink solvent absorption rate of multiple colors, based on the cardboard humidity value at the sample point of the maximum ink layer thickness, the drying time, and the density value of the sample point of the maximum ink layer thickness.

7. A simple inkjet manufacturing process according to claim 3, characterized in that: Based on the local printing images of different thickness ranges, the ink mark analysis includes: Ⅰ. There is no friction ink mark on the surface of the sample point with the maximum ink layer thickness, and there is no ink mark on the test head; Ⅱ. The surface of the sample with the maximum ink layer thickness has friction ink marks, the depth of the friction ink marks is less than 1mm, and there are no friction marks on the sample of the secondary ink layer or the test head; Ⅲ. The surface of the sample with the maximum ink layer thickness has color shedding, the depth of the friction ink marks is greater than 1mm, and there are friction marks on the sample of the secondary ink layer or the test head; Ⅳ. The surface of the sample with the maximum ink layer thickness has color shedding, the depth of the friction ink marks is greater than 1mm, and there are friction marks on the sample of the secondary ink layer or the test head, and the depth of the friction ink marks is greater than 1mm; Ⅴ. The surface of the sample with the maximum ink layer thickness has unclear graphics and characters, the depth of the friction ink marks is greater than 1mm, the sample of the secondary ink layer has color shedding or the test head is covered with friction marks, the depth of the friction ink marks is greater than 1mm, and the cardboard at the sample of the secondary ink layer is damaged; For ink mark analysis, the color change level of the sample point and the color staining level of the test head should be determined at the same time, and the one with the higher wear resistance level should be used as the judgment result; Level I indicates that the drying effect of the carton is the best, and Level V indicates that the drying effect of the carton is the worst.

8. A simple inkjet manufacturing process according to claim 7, characterized in that: Based on the cardboard printing image containing a single-color printing image or a printing image with multiple colors superimposed, the ink density D0 of the sample point with the maximum ink layer thickness before the ink layer wear resistance test and the ink density D1 of the sample point with the maximum ink layer thickness after the ink layer wear resistance test are obtained respectively; the wear resistance performance A=(D0 / D1)x100% is calculated. The larger the value of the wear resistance performance A, the better the wear resistance of the carton ink and the better the drying effect. Conversely, the smaller the value, the worse the wear resistance of the carton ink and the worse the drying effect.

9. A simple inkjet manufacturing process according to claim 3, characterized in that: When the cardboard printing image is a printing image of multiple colors, based on the color analysis result, the effective color proportion of the printing color corresponding to each pixel of the sample point is calculated; The color filters of red, yellow, blue and other primary color inks are used as the basic colors. During the ink printing process of the carton, the basic colors are printed first. When the printing color is missing, the three primary colors of red, yellow and blue are superimposed and complemented, or any of the three primary colors is superimposed and complemented with other primary color inks to obtain the printed color image.

10. A simple inkjet manufacturing system, characterized in that: Applicable to the inkjet manufacturing process described in any one of claims 1 to 9, comprising: An image data acquisition module, used to acquire the ink layer thickness of the paperboard printing image; The color quality analysis module analyzes the quality of the printed image according to the ink layer thickness of the printed image on the paperboard to obtain the quality analysis result; The ink layer wear resistance grading test module performs ink layer wear resistance grading tests on five sample points according to the local printed images in different thickness ranges to obtain ink mark analysis results; The color overlay module matches the basic colors according to the ink layer thickness and color quality of each color range of the printed color of the cardboard printing image; An inkjet module, spraying ink based on printing pattern unit data; Drying module: Determine the drying temperature, drying humidity and drying time of the carton based on the ink mark analysis; The oil spraying module performs fixed-point oil spraying based on the ink printed pattern on the carton that has completed the drying process.

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