Intelligent gravure scraper control method and system

Abstract

The invention relates to a gravure intelligent scraper control method and system, and relates to the field of gravure printing technology, and the gravure intelligent scraper control method comprises the following steps: obtaining a scraper number, real-time feedback force of the surface of a plate cylinder to a scraper corresponding to the scraper number, and a cylinder rotation state; drawing a force change curve by combining the real-time feedback force with the rotation state of the roller; acquiring a force change rule based on the force change curve; when the force change rule falls into the pattern curve rule, the area, corresponding to the scraper number corresponding to the force change rule, of the surface of the plate cylinder is judged to be a pattern area; when the force change rule falls into the smooth surface curve rule, judging that the area of the surface of the plate cylinder corresponding to the scraper number corresponding to the force change rule is a smooth surface area, and defining the scraper number corresponding to the smooth surface area as an auxiliary scraper number; and controlling the ink to drop in the pattern area, and controlling the scraper corresponding to the auxiliary scraper number to rotate according to a preset guide rotation angle. The invention has the effect of reducing the waste of ink in the smooth surface area.

Description

Technical Field

[0001] This invention relates to the field of gravure printing technology, and in particular to a gravure intelligent squeegee control method and system. Background Technology

[0002] The gravure intelligent doctor blade is a closed-loop system integrating sensing, control, algorithms and actuators. It can monitor the doctor blade status in real time, automatically adjust the doctor blade pressure, angle and position, and realize wear prediction and process linkage. It solves the problems of traditional doctor blades that rely on manual labor, are prone to ink streaks, and have frequent downtime, significantly improving printing quality and efficiency. It is widely used in a variety of high-end printing fields.

[0003] In related technologies, such as Chinese Patent CN109572158A, which discloses a doctor blade control system for printing with a single solvent ink, the system includes a doctor blade adjustment system, a doctor blade, a controller, a sensor system, a data input device, and a data server. Compared with existing technologies, this invention sends various parameter data during gravure printing to the controller via the sensor system and data input device. The controller automatically obtains the doctor blade position parameters from the data server, allowing it to adjust the doctor blade position, doctor blade angle, and pressure between the doctor blade and the gravure printing roller through the doctor blade adjustment system. Combined with the evaporation rate of the solvent in the single solvent ink, the control is simple, highly accurate, and effectively ensures the quality of gravure printing.

[0004] Regarding the aforementioned technologies, although existing gravure intelligent doctor blades possess complete closed-loop control and intelligent adjustment capabilities, they cannot accurately obtain the gravure printing position of the patterned area on the printing cylinder during rotation. This results in ink in the glossy area being constantly dripping and scraped off, making it impossible to utilize effectively and causing ink waste. Summary of the Invention

[0005] To reduce ink waste in glossy areas, this invention provides a gravure printing intelligent squeegee control method and system.

[0006] In a first aspect, the present invention provides a method for controlling an intelligent gravure printing blade, which adopts the following technical solution:

[0007] A method for controlling an intelligent scraper in gravure printing includes:

[0008] Step 1: In response to the power-on signal, control several doctor blades along the cylinder axis to abut against the surface of the printing cylinder according to a preset detection pressure, and obtain the doctor blade number and the real-time feedback force of the printing cylinder surface to the doctor blade corresponding to the corresponding doctor blade number and the cylinder rotation state. The cylinder rotation state includes the real-time rotation speed, rolling time and cylinder rotation angle of the printing cylinder.

[0009] Step 2: Combine the real-time feedback force with the roller rotation state to plot the force change curve, which is the curve of real-time feedback force and rolling time;

[0010] Step 3: Obtain the pattern of force change based on the force change curve;

[0011] Step 4: When the intensity change pattern falls into the preset pattern curve pattern, determine that the area on the printing cylinder surface corresponding to the squeegee number of the intensity change pattern is the pattern area, and define the squeegee number corresponding to the pattern area as the main squeegee number.

[0012] Step 5: When the force change pattern falls into the preset smooth surface curve pattern, determine that the area on the printing cylinder surface corresponding to the doctor blade number corresponding to the force change pattern is the smooth surface area, and define the doctor blade number corresponding to the smooth surface area as the secondary doctor blade number.

[0013] Step 6: In response to the preset gravure printing signal, control the ink droplets to fall on the pattern area, and control the squeegee corresponding to the secondary squeegee number to rotate according to the preset guide rotation angle to scrape the ink that accidentally fell into the glossy area to the pattern area and control the ink to achieve gravure printing.

[0014] By adopting the above technical solution, multiple doctor blades are controlled to contact the printing plate cylinder during startup, and real-time feedback on the force and rotation status of the cylinder is collected. The force curve is plotted and analyzed to facilitate automatic identification of pattern areas and glossy areas, thereby dividing the main and secondary doctor blades. The secondary doctor blades can be controlled to rotate and guide the ink to the pattern area. This solves the problem that traditional gravure doctor blades have difficulty distinguishing between pattern areas and glossy areas, which leads to ink splashing onto the glossy area, causing ink waste and ineffective ink utilization. The solution achieves intelligent ink scraping and precise ink control.

[0015] Optional, also includes:

[0016] Step 60: When a preset ink dripping signal is received, obtain the ink feedback force of the ink to the secondary doctor blade number;

[0017] Step 61: If the ink feedback force is greater than the preset ink threshold, accumulate the ink adhesion time;

[0018] Step 62: When the ink adhesion time is greater than the preset dwell time threshold, calculate the fine-tuning angle based on the guide rotation angle and the preset interval angle;

[0019] Step 63: Control the doctor blade corresponding to the secondary doctor blade number to adjust the fine-tuning angle and continue to obtain ink feedback force;

[0020] Step 64: If the adjusted ink feedback force is still greater than the ink threshold and the corresponding ink adhesion time is greater than the dwell time threshold, continue to update the fine-tuning angle.

[0021] By adopting the above technical solution, the ink feedback force of the secondary doctor blade is detected in real time. When the ink is excessive and accumulates for a long time, the angle of the secondary doctor blade is automatically adjusted iteratively according to the preset interval angle. This solves the problem of ink splashing to both sides and accumulating in the glossy area, which is difficult to gather. This improves the stability of ink control and printing effect.

[0022] Optional, also includes:

[0023] Step 65: When a preset ink dripping signal is received, obtain the main ink force of the ink on the main doctor blade number;

[0024] Step 66: If the main ink force is greater than the preset main force threshold, determine the numbers of the adjacent two auxiliary doctor blades based on the main doctor blade number;

[0025] Step 67: After adjusting the numbers of the adjacent secondary doctor blades to the numbers of the primary doctor blades, continue to obtain the main ink pressure;

[0026] Step 68: If the adjusted main ink force is still greater than the main force threshold, continue to update the main doctor blade number.

[0027] By adopting the above technical solution, the main ink force of the main doctor blade is monitored in real time. When too much ink accumulates and exceeds the main force threshold, the adjacent secondary doctor blade is automatically upgraded to the main doctor blade to expand the ink scraping area. This continuous iterative adjustment solves the problem of ink accumulation at the main doctor blade, which affects ink scraping and achieves the effect of balanced ink load.

[0028] Optionally, a method for verifying the sensitivity of the scraper may also be included, which includes:

[0029] Step 640: Obtain the real-time feedback force of the secondary scraper number groups on both sides of the main scraper number;

[0030] Step 641: Count the number of numbers in the secondary scraper number groups on both sides respectively;

[0031] Step 642: Define the number groups of the two secondary scrapers corresponding to the smaller number as the baseline number group, and define the number groups of the two secondary scrapers corresponding to the larger number as the comparison number group. Starting from the secondary scraper numbers on both sides that are closer to the main scraper number, compare the real-time feedback intensity in the baseline number group with the real-time feedback intensity in the comparison number group to obtain the comparison result.

[0032] Step 643: When the comparison results are inconsistent, determine the real-time feedback force with the smaller value based on the comparison results, and define the secondary scraper number corresponding to the real-time feedback force with the smaller value as the problem scraper number.

[0033] Step 644: Output the preset scraper adjustment signal and the problem scraper number.

[0034] By adopting the above technical solution, the secondary scraper numbers on both sides of the main scraper number are divided into a reference number group and a comparison number group, and the corresponding positions are compared in real time to automatically identify the faulty scrapers with abnormal force or possible sensitivity failure. This solves the problem that gravure printing scrapers cannot accurately identify faulty scrapers.

[0035] Optionally, it also includes a solution method after outputting a preset scraper adjustment signal and the problematic scraper number, the method including:

[0036] Step 6440: Determine the same-side auxiliary scraper number group and the single-side scraper number close to the main scraper number based on the problem scraper number, wherein the same-side auxiliary scraper number group includes the problem scraper number;

[0037] Step 6441: Determine the current guide rotation angle based on the number group of the auxiliary scraper on the same side;

[0038] Step 6442: Calculate the contact adjustment angle based on the current guide rotation angle and the preset adjustment angle;

[0039] Step 6443: Control the scraper corresponding to the same side auxiliary scraper number group to adjust according to the contact adjustment angle and continue to obtain the real-time feedback force of the single-side scraper number;

[0040] Step 6444: If the real-time feedback force of the adjusted single-sided scraper number is greater than 0, continue to update the contact adjustment angle until the real-time feedback force of the single-sided scraper number is equal to 0.

[0041] Step 6445: When the contact adjustment angle is the preset maximum adjustment angle and the real-time feedback force of the single-sided scraper number is still greater than 0, output a scraper alarm signal.

[0042] By adopting the above technical solution, the contact adjustment angle of the auxiliary doctor blade group on the same side as the problematic doctor blade is gradually adjusted, so that the real-time feedback force of the problematic doctor blade is reduced to zero and enters a state of no force. This solves the problem that the continued operation of the malfunctioning doctor blade will affect ink control and achieves the effect of automatic isolation of the faulty doctor blade.

[0043] Optional solutions after outputting a scraper alarm signal include:

[0044] Step 64450: Within the same side secondary scraper number group, starting from the problem scraper number and moving away from the main scraper number, determine the outer scraper number group and the number of outer scraper numbers within the outer scraper number group, wherein the outer scraper number group includes the problem scraper number;

[0045] Step 64451: Determine the number of additional scraper numbers needed based on the number of outer scraper numbers;

[0046] Step 64452: Determine the remaining scraper number groups based on the same-side auxiliary scraper number groups;

[0047] Step 64453: Update the overall scraper number group based on the remaining scraper number groups and the number of scraper numbers that need to be added;

[0048] Step 64454: Control the area where the outer doctor blade number group moves out of the printing cylinder surface, and define the length of the area where the outer doctor blade number group moves out of the printing cylinder surface as the moving length;

[0049] Step 64455: Based on the overall squeegee number group, determine the updated main squeegee number and the updated secondary squeegee number. Control the overall squeegee number group to move towards the outer squeegee number group by the moving length so that the squeegee corresponding to the updated main squeegee number falls into the pattern area. Control the ink droplet to fall into the pattern area. Control the squeegee corresponding to the updated secondary squeegee number to rotate according to the guide rotation angle to scrape the ink that accidentally fell into the glossy area to the pattern area and control the ink to achieve gravure printing.

[0050] By adopting the above technical solution, the outer scraper number group containing the faulty scraper is moved out of the working area, and the numbering is reassigned according to the remaining scrapers and the added scrapers. The entire scraper is moved to fill the gaps, and the main and secondary scrapers are re-divided to adapt to the pattern area and the glossy area. This solves the problem of difficult intelligent replacement when the faulty scraper cannot be repaired, and achieves the effect of automatic removal of faulty scrapers and automatic reconstruction of the scraper group.

[0051] Optional, also includes:

[0052] Step 6446: When an ink dripping signal is received, determine the similar reference number group and the remaining number groups based on the comparison number group according to the direction away from the main doctor blade number and the number of reference number groups;

[0053] Step 6447: Obtain the feedback strength of the ink on the edge ink of the remaining numbered groups;

[0054] Step 6448: If the edge ink feedback force exists, determine the actual guide rotation angle based on the reference number group and the comparison number group;

[0055] Step 6449: Calculate the leak-proof rotation angle based on the actual guide rotation angle and the preset leak-proof angle;

[0056] Step 64410: Control the doctor blades corresponding to the reference number group and the comparison number group to adjust according to the anti-leakage rotation angle and continue to obtain edge ink feedback force;

[0057] Step 64411: If the adjusted edge ink feedback force still exists, continue to update the anti-leakage rotation angle.

[0058] By adopting the above technical solution, the numbering groups of secondary scrapers with different numbers on both sides of the main scraper are symmetrically compared and divided. The edge ink feedback intensity of the other numbering groups is obtained in real time, and the scraper anti-leakage rotation angle is adjusted iteratively accordingly. This solves the problem that ink is easy to leak from the edge due to the asymmetrical number of secondary scrapers on both sides, and achieves the effect of effective sealing of edge ink.

[0059] Optional, also includes:

[0060] Step 600: Count the main quantity of the main scraper numbers corresponding to the pattern areas along the roller axis;

[0061] Step 601: When the main number is greater than 1, determine the interval sub-scraper number based on the main scraper number and count the interval number;

[0062] Step 602: If the number of intervals is less than the preset interval threshold, update the secondary scraper number to the primary scraper number.

[0063] By adopting the above technical solution, the number of main scraper blades corresponding to the pattern area and the number of secondary scraper blades between adjacent main scraper blades are counted. When the spacing between the main scraper blades is small, the intermediate secondary scraper blades are upgraded to main scraper blades, thus solving the problem of discontinuous ink scraping areas when multiple pattern areas are close together.

[0064] Optionally, if the number of intervals exceeds a preset interval threshold, the following methods may be used:

[0065] Step 603: Divide the interval secondary scraper numbers into positive rotation scraper numbers and negative rotation scraper numbers according to the number of intervals;

[0066] Step 604: Control the squeegee corresponding to the forward-rotating squeegee number to rotate according to the preset guiding forward rotation angle, and the squeegee corresponding to the reverse-rotating squeegee number to rotate according to the preset guiding reverse rotation angle, so as to scrape the ink that accidentally falls into the glossy area to the pattern area and control the ink to achieve gravure printing.

[0067] By adopting the above technical solution, when the spacing between the main scrapers is large, the secondary scrapers in the middle are divided into two groups of forward and reverse rotation and rotated according to the corresponding guiding angle. This solves the problem that the ink in the light surface area cannot be effectively utilized when the spacing between multiple pattern areas is far apart, and achieves the effect of bidirectional guidance of ink to the pattern areas on both sides.

[0068] Secondly, the present invention provides an intelligent gravure printing blade control system, which adopts the following technical solution:

[0069] A gravure printing intelligent scraper control system includes:

[0070] The acquisition module is used to acquire the doctor blade number, real-time feedback force, roller rotation status, ink feedback force, main ink force, real-time feedback force, and edge ink feedback force.

[0071] A memory for storing a program for a gravure intelligent scraper control method as described above;

[0072] The processor loads and executes programs from memory.

[0073] By adopting the above technical solution, multiple doctor blades are controlled to contact the printing plate cylinder during startup, and real-time feedback on the force and rotation status of the cylinder is collected. The force curve is plotted and analyzed to facilitate automatic identification of pattern areas and glossy areas, thereby dividing the main and secondary doctor blades. The secondary doctor blades can be controlled to rotate and guide the ink to the pattern area. This solves the problem that traditional gravure doctor blades have difficulty distinguishing between pattern areas and glossy areas, which leads to ink splashing onto the glossy area, causing ink waste and ineffective ink utilization. The solution achieves intelligent ink scraping and precise ink control.

[0074] In summary, the present invention has at least one of the following beneficial technical effects:

[0075] 1. It solves the problem that traditional gravure printing squeegees have difficulty distinguishing between patterned areas and glossy areas, which leads to ink splattering onto glossy areas, resulting in ink waste and ineffective ink utilization. It achieves intelligent squeegeeing and precise ink control.

[0076] 2. It solves the problem of difficult intelligent replacement when faulty scrapers cannot be repaired, and achieves the effect of automatically removing faulty scrapers and automatically reconstructing scraper sets;

[0077] 3. It solves the problem that ink in the light surface area cannot be effectively utilized when there are many pattern areas with large gaps, and achieves the effect of bidirectional guidance of ink to the pattern areas on both sides. Attached Figure Description

[0078] Figure 1 This is a flowchart of a gravure printing intelligent scraper control method according to an embodiment of this application;

[0079] Figure 2 This is a structural diagram of a gravure printing smart scraper in an embodiment of this application. Detailed Implementation

[0080] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0081] This invention discloses a method for controlling an intelligent doctor blade in gravure printing. (Refer to...) Figure 1 A method for controlling an intelligent scraper in gravure printing includes:

[0082] Step 1: In response to the power-on signal, control several doctor blades along the cylinder axis to abut against the surface of the printing cylinder according to the preset detection pressure, and obtain the doctor blade number and the real-time feedback force of the printing cylinder surface to the doctor blade corresponding to the corresponding doctor blade number and the cylinder rotation status. The cylinder rotation status includes the real-time rotation speed, rolling time and cylinder rotation angle of the printing cylinder.

[0083] The power-on signal is the instruction signal that initiates the printing press equipment and enters the testing phase. This signal is pre-set by those skilled in the art and output on the printing press's control panel.

[0084] Reference Figure 2 The direction of the cylinder axis refers to the length direction of the printing cylinder. This direction is an inherent direction of the mechanical structure of the printing press and is obtained in advance by those skilled in the art.

[0085] Several doctor blades refer to multiple doctor blades arranged along the axial direction of the printing cylinder. Each doctor blade can be individually controlled in terms of angle and pressure. The number of these doctor blades not only covers the entire axial direction of the printing cylinder but also provides supplementary blades in case of malfunction. Each doctor blade is mounted on a flexible mounting plate, which is an elastic plate with a certain rigidity used to fix the doctor blades. This allows for the entire row of doctor blades to move as a whole along the cylinder axis while also allowing each doctor blade to rotate and adjust its angle independently. Elastic metal strips, carbon fiber elastic strips, flexible composite materials, etc., can all be used as materials for the flexible mounting plate to achieve a flexible effect. These doctor blades are obtained through pre-setting by those skilled in the art.

[0086] The detection pressure refers to the reference pressure used during startup testing, where the doctor blade lightly presses against the surface of the printing plate cylinder to collect the force change curve and distinguish between patterned and glossy areas. The detection pressure is evaluated based on the pressure sensor's ability to stably collect the force difference between the patterned and glossy areas without damaging the printing plate cylinder. A pressure value that ensures both detection sensitivity and safety is ultimately determined. This detection pressure is determined by professionals in the field through orthogonal experimental design using factors such as the hardness of the printing plate cylinder surface coating and ink characteristics, comparing different pressure values ​​(e.g., 1N to 5N). For example, when the detection pressure is in the range of 2N to 4N, the pressure sensor can stably and accurately collect the force difference between the patterned and glossy areas without visible damage to the printing plate cylinder. When the pressure is below 2N, the force difference is not significant, and the recognition accuracy decreases; when the pressure is above 4N, although the recognition accuracy is slightly improved, there is a risk of damaging the printing plate cylinder. Therefore, the preferred detection pressure is 3N.

[0087] The surface of a printing cylinder refers to the surface of a cylinder with an intaglio pattern used for ink transfer. This cylinder surface is obtained in advance by those skilled in the art by selecting the appropriate printing cylinder according to the work requirements.

[0088] The scraper number is a unique identifier assigned to each scraper. This number is obtained by personnel skilled in the art who assign it sequentially along the axis of the roller.

[0089] Real-time feedback force refers to the reaction force exerted by the printing cylinder surface on the doctor blade. This feedback force is acquired in real time by a pressure sensor on each doctor blade.

[0090] The cylinder rotation status refers to the data set of the printing cylinder's motion status, including real-time rotational speed, rolling time, and cylinder rotation angle. Real-time rotational speed refers to the rotational speed of the printing cylinder per unit time. This speed is obtained by a speed sensor installed at the end of the printing cylinder shaft, which collects pulse signals in real time. The real-time rotational speed is calculated based on the number of pulses per unit time. Rolling time refers to the cumulative time from the start of the printing cylinder's rotation to the current moment. This time is obtained by timing the rotation using an internal timer of the printing press. The cylinder rotation angle refers to the angular position the cylinder has currently rotated through, used for positioning the pattern area. This angle is obtained by an angle sensor installed at the end of the printing cylinder shaft, whose output signal is collected to obtain the current rotation angle of the printing cylinder in real time.

[0091] Step 2: Combine the real-time feedback force with the roller rotation status to plot the force change curve. The force change curve is the curve of real-time feedback force and rolling time.

[0092] The force variation curve is a curve plotted with rolling time as the horizontal axis and real-time feedback force as the vertical axis. This curve is formed by matching the real-time feedback force with the corresponding rolling time and connecting the data points in chronological order to create a continuous curve.

[0093] Step 3: Obtain the law of force change based on the force change curve.

[0094] The pattern of intensity variation refers to the features extracted from the intensity variation curve, including fluctuation amplitude and fluctuation period. This pattern is obtained by first smoothing the intensity variation curve using a moving average filtering algorithm and then analyzing it to extract its features.

[0095] Step 4: When the intensity change pattern falls into the preset pattern curve pattern, determine that the area on the printing cylinder surface corresponding to the squeegee number of the intensity change pattern is the pattern area, and define the squeegee number corresponding to the pattern area as the main squeegee number.

[0096] The pattern curve regularity refers to the characteristic curve regularity of the force change curve corresponding to the pattern on the roller surface, which can be used for quantitative identification. Specifically, it includes the pattern fluctuation amplitude threshold and the pattern fluctuation period range. This regularity is determined by prior experiments conducted by those skilled in the art based on different printing plate rollers and ink types. Typical patterned areas and glossy areas are selected, and their force change curves are collected respectively. The curves are smoothed using a moving average filtering algorithm, and the average fluctuation amplitude of each is calculated. The midpoint between the two is taken as the fluctuation amplitude threshold. The force fluctuation corresponding to the pattern area is usually related to the repetition period of the gravure pattern and has a relatively stable period. Those skilled in the art set the pattern fluctuation period range based on the repetition period of the gravure pattern.

[0097] The pattern area refers to the area on the printing cylinder with the intaglio pattern used for inking and imaging. This area is determined by comparing the intensity variation pattern with the preset pattern curve pattern.

[0098] The main doctor blade number refers to the doctor blade number that corresponds to the pattern area and is responsible for the main functions of scraping and controlling ink. This number is automatically obtained by identifying the corresponding area as a pattern area.

[0099] When the intensity change pattern falls into the preset pattern curve pattern, it means that the intensity change pattern simultaneously satisfies the condition that the fluctuation amplitude is greater than the pattern fluctuation amplitude threshold and the fluctuation period falls within the pattern fluctuation period range. At this time, the printing cylinder surface area corresponding to the curve segment is determined to be the pattern area, and the doctor blade number corresponding to the area is marked as the main doctor blade number.

[0100] Step 5: When the intensity change pattern falls into the preset smooth surface curve pattern, determine that the area on the printing cylinder surface corresponding to the doctor blade number of the intensity change pattern is the smooth surface area, and define the doctor blade number corresponding to the smooth surface area as the secondary doctor blade number.

[0101] The smooth surface curve pattern refers to the characteristic curve pattern of the force change curve corresponding to the smooth, unpatterned area of ​​the printing cylinder surface, which can be used for quantitative identification. Specifically, it includes the smooth surface fluctuation amplitude threshold and the smooth surface fluctuation periodicity. This pattern was determined by prior experiments conducted by professionals in the field based on different printing cylinders and ink types. Typical smooth areas were selected, and their force change curves were collected. The curves were smoothed using a moving average filtering algorithm, and the average fluctuation amplitude was calculated. A value lower than the pattern fluctuation amplitude threshold was set as the smooth surface fluctuation amplitude threshold. Because the surface of the smooth area is smooth and the doctor blade is subjected to uniform force, its force change curve has no stable fluctuation period and exhibits random noise characteristics.

[0102] The glossy area refers to the smooth, patternless area on the printing cylinder used solely for guiding and controlling ink. This area is determined by comparing the intensity variation pattern with a preset glossy curve pattern.

[0103] The secondary squeegee number refers to the auxiliary squeegee number used to guide ink back to the pattern area in the corresponding glossy area. This number is automatically obtained by identifying the corresponding area as a glossy area.

[0104] When the intensity change pattern falls into the preset smooth surface curve pattern, it means that the intensity change pattern simultaneously satisfies the condition that the fluctuation amplitude is less than the smooth surface fluctuation amplitude threshold and there is no stable fluctuation period. At this time, the printing cylinder surface area corresponding to this curve segment is determined to be a smooth surface area, and the doctor blade number corresponding to this area is marked as the secondary doctor blade number.

[0105] Step 6: In response to the preset gravure printing signal, control the ink droplets to fall on the pattern area, and control the squeegee corresponding to the secondary squeegee number to rotate according to the preset guide rotation angle to scrape the ink that accidentally fell into the glossy area to the pattern area and control the ink to achieve gravure printing.

[0106] The gravure printing signal is the start signal for the printing press to enter the formal printing process. This signal is preset by those skilled in the art and output on the printing press's control panel.

[0107] The guide rotation angle refers to the angle between the doctor blade's cutting edge and the tangent to the surface of the printing cylinder. It is used to guide ink that accidentally falls into the glossy area to the pattern area. This angle is obtained by those skilled in the art through a series of comparative experiments, taking into account the rheological properties of the ink, the linear velocity of the printing cylinder, and the mechanical structure of the doctor blade. That is, the guiding efficiency and splashing of ink are observed at different angles. Finally, an optimal angle value (e.g., 30 degrees) is selected as the preset guide rotation angle, which can ensure that the ink is efficiently and stably guided back to the pattern area while minimizing ink splashing.

[0108] The squeegee rotation is achieved by fixing each squeegee to a flexible mounting plate, which is connected to the output of a micro rotary motor. The micro rotary motor is fixed to the printing press frame. When the micro rotary motor rotates, it drives the flexible mounting plate and the squeegee to rotate synchronously, allowing for independent adjustment of the squeegee angle. Controlling the squeegee corresponding to the sub-squeegee number to rotate according to a preset guide angle drives the micro rotary motor to rotate, causing the corresponding squeegee to rotate independently to the guide angle. When ink drips onto the pattern area, due to ink splattering during printing, some ink may fall into the glossy area. In this case, by controlling the squeegee corresponding to the sub-squeegee number to rotate according to the guide angle, the inclined surface of the squeegee scrapes the ink that fell into the glossy area to the pattern area, while simultaneously controlling the ink to ensure uniform distribution within the pattern area.

[0109] This also includes:

[0110] Step 60: When a preset ink dripping signal is received, obtain the ink feedback force of the ink to the secondary doctor blade number.

[0111] The ink dripping signal is the instruction signal that ink begins to drip onto the patterned area on the surface of the printing cylinder. The method for acquiring this signal is the same as that for gravure printing signals, and will not be repeated here.

[0112] Ink feedback force refers to the force exerted by ink on the doctor blade corresponding to the secondary doctor blade number after ink splashes and adheres to it. This ink feedback force is acquired in real time by a force sensor on the doctor blade corresponding to the secondary doctor blade number.

[0113] Step 61: If the ink feedback force is greater than the preset ink threshold, accumulate the ink adhesion time.

[0114] The ink threshold refers to the upper limit of ink feedback force used to determine whether there is excessive ink in the glossy area. This threshold is obtained by having skilled personnel in the art conduct prior experiments to collect upper limit values, and is pre-stored in the printing press.

[0115] Ink adhesion time refers to the cumulative time during which ink continuously and extensively adheres to the doctor blade corresponding to the secondary doctor blade number. This time is obtained by accumulating the ink feedback force for a period of time that is continuously greater than the ink threshold using an internal timer of the printing press.

[0116] Step 62: When the ink adhesion time is greater than the preset dwell time threshold, the fine-tuning angle is calculated based on the guide rotation angle and the preset interval angle.

[0117] The residence time threshold is the critical time value used to determine whether ink has accumulated for an extended period and whether the corresponding doctor blade needs adjustment. This threshold is preset by those skilled in the art.

[0118] The interval angle refers to the unit angle at which the scraper angle is finely adjusted each time. This angle is obtained by being preset by someone skilled in the art.

[0119] The fine-tuning angle refers to the new guide rotation angle obtained by adding an interval angle to the original guide rotation angle. This angle is calculated by adding the guide rotation angle and the interval angle.

[0120] Step 63: Control the doctor blade corresponding to the secondary doctor blade number to adjust the angle according to the fine-tuning and continue to obtain ink feedback force.

[0121] This step is to concentrate the ink more closely to the pattern area. The larger the guiding rotation angle of the secondary doctor blade, the more directly the ink can be guided to the pattern area by the rotation of the printing cylinder, reducing ink adhesion and accumulation on the doctor blades corresponding to the secondary doctor blade numbers.

[0122] Step 64: If the adjusted ink feedback force is still greater than the ink threshold and the corresponding ink adhesion time is greater than the dwell time threshold, continue to update the fine-tuning angle.

[0123] If the adjusted ink feedback force is still greater than the ink threshold and the corresponding ink adhesion time is greater than the dwell time threshold, it means that the ink is still excessive after one adjustment. Then, add an interval angle on the basis of the original fine adjustment angle to form a new adjustment angle for iterative adjustment until the ink feedback force is no greater than the ink threshold, or the fine adjustment angle reaches the preset limit angle, such as a 90-degree right angle, then stop adjusting.

[0124] This also includes:

[0125] Step 65: When a preset ink dripping signal is received, obtain the main ink force of the ink on the main doctor blade number.

[0126] The main ink force refers to the force exerted by the ink on the doctor blade corresponding to its number when the ink converges and accumulates. This force is acquired in real time by a force sensor on the doctor blade corresponding to its number.

[0127] Step 66: If the main ink force is greater than the preset main force threshold, determine the numbers of the adjacent two auxiliary blades based on the main blade number.

[0128] The primary pressure threshold refers to the critical pressure value used to determine whether excessive ink has accumulated on the doctor blade corresponding to the main doctor blade number. This threshold is preset by those skilled in the art.

[0129] The adjacent secondary scraper numbers refer to the secondary scraper numbers located immediately to the left and right of the current primary scraper number in the scraper numbering sequence. These numbers are determined by querying the axial arrangement order based on the current primary scraper number.

[0130] Step 67: After adjusting the numbers of the adjacent secondary doctor blades to the numbers of the primary doctor blades, continue to obtain the main ink pressure.

[0131] This step, adjusting the numbers of adjacent secondary doctor blades to primary doctor blade numbers, means re-marking and upgrading the numbers that originally belonged to secondary doctor blades into primary doctor blade numbers in the system. This allows them to execute the ink control logic of the primary doctor blades. By increasing the number of primary doctor blades, the main ink pressure is shared with the original primary doctor blades, thereby optimizing the printing effect.

[0132] Step 68: If the adjusted main ink force is still greater than the main force threshold, continue to update the main doctor blade number.

[0133] If the adjusted main ink strength is still greater than the main strength threshold, it indicates that the ink is still excessive after one adjustment. Continue to upgrade the adjacent secondary doctor blades on the outermost side to main doctor blades, and continuously expand the range of main doctor blades until all doctor blades are upgraded to main doctor blades and then stop updating.

[0134] This also includes a method for verifying the sensitivity of the scraper, which includes:

[0135] Step 640: Obtain the real-time feedback force of the secondary scraper number groups on both sides of the main scraper number.

[0136] The two auxiliary scraper numbering groups refer to the groups centered on the main scraper. The left group consists of all the auxiliary scraper numbers located to the left of the main scraper, and the right group consists of all the auxiliary scraper numbers located to the right of the main scraper. These two groups are collectively referred to as the two auxiliary scraper numbering groups. The main scraper numbering group does not include the main scraper number. This numbering group is based on the main scraper number and its axial arrangement order.

[0137] The real-time feedback intensity has already been explained in step 1 and will not be repeated here.

[0138] Step 641: Count the number of numbers in the secondary scraper number groups on both sides respectively.

[0139] The number of numbers refers to the number of scrapers contained in each of the two auxiliary scraper number groups. This number is determined by statistically counting the numbers within each of the two auxiliary scraper number groups.

[0140] Step 642: Define the number groups of the two secondary scrapers corresponding to the smaller number as the baseline number group, and define the number groups of the two secondary scrapers corresponding to the larger number as the comparison number group. Starting from the secondary scraper numbers on both sides closest to the main scraper number, compare the real-time feedback intensity in the baseline number group with the real-time feedback intensity in the comparison number group to obtain the comparison result.

[0141] The reference number group refers to the group with the fewer numbers among the two auxiliary scraper groups on the left and right sides of the main scraper, serving as a standard reference group for comparison. The comparison number group refers to the group with the more numbers among the two auxiliary scraper groups on the left and right sides of the main scraper, used for force comparison with the reference group. Both the reference number group and the comparison number group are determined by comparing the number of numbers on both sides.

[0142] The comparison result refers to the judgment result of whether the real-time feedback force of the scraper at the corresponding position in the benchmark number group and the comparison number group is consistent. This result is obtained through comparison calculation.

[0143] Starting from the position closest to the main scraper, compare the first scraper in the reference number group with the first scraper in the comparison number group, compare the second scraper in the reference number group with the second scraper in the comparison number group, and then compare the corresponding real-time feedback force of the secondary scrapers with the same position and order to obtain the comparison result.

[0144] Step 643: When the comparison results are inconsistent, determine the real-time feedback force with the smaller value based on the comparison results, and define the secondary scraper number corresponding to the real-time feedback force with the smaller value as the problem scraper number.

[0145] The "problem scraper number" refers to the scraper that, during comparison, was found to have a lower or no real-time feedback force than the baseline number group, and was therefore deemed insensitive, malfunctioning, or faulty. This number is assigned when there are discrepancies in the real-time feedback force during comparison; the scraper with the lower real-time feedback force value in the corresponding position within the comparison group is designated as the problem scraper number.

[0146] Step 644: Output the preset scraper adjustment signal and the problem scraper number.

[0147] The scraper adjustment signal is a signal used to prompt for angle adjustment of a faulty scraper. This signal is obtained through pre-setting by those skilled in the art.

[0148] By outputting the scraper adjustment signal and the problematic scraper number together, the scraper number that needs adjustment can be clearly identified.

[0149] This includes a solution method that outputs a preset scraper adjustment signal and the problematic scraper number. The method includes:

[0150] Step 6440: Determine the sub-scraper number group on the same side and the single-sided scraper number close to the main scraper number based on the problem scraper number. The sub-scraper number group on the same side includes the problem scraper number.

[0151] The "same-side auxiliary scraper number group" refers to the set of numbers for all auxiliary scrapers located on the same side as the problematic scraper and including that problematic scraper. This number group is determined based on the positional relationship between the problematic scraper number and the main scraper number.

[0152] The single-sided scraper number refers to the scraper number closest to the main scraper among the two scrapers adjacent to the problematic scraper. This number is determined based on the axial arrangement order of the scrapers on the drum.

[0153] Step 6441: Determine the current guide rotation angle based on the number group of the auxiliary scraper on the same side.

[0154] The current guide rotation angle refers to the guide rotation angle currently in use for the same-side auxiliary doctor blade number group before subsequent adjustments are performed. This angle is obtained by reading from the printing press's current operating parameters.

[0155] Step 6442: Calculate the contact adjustment angle based on the current guide rotation angle and the preset adjustment angle.

[0156] The adjustment angle refers to the single adjustment angle used to gradually adjust the scraper angle. This adjustment angle is obtained through pre-setting by those skilled in the art.

[0157] The contact adjustment angle refers to the new target adjustment angle obtained by superimposing a preset adjustment angle on the current guide rotation angle. It is used to gradually reduce the feedback force of the ink on the problematic doctor blade.

[0158] Step 6443: Control the scraper corresponding to the same side secondary scraper number group to adjust according to the contact adjustment angle and continue to obtain the real-time feedback force of the single-side scraper number.

[0159] This step involves adjusting the corresponding scraper in the same side's auxiliary scraper group according to the calculated contact adjustment angle. The aim is to gradually bring the problematic scraper into a state of no force, reducing its effectiveness. After adjustment, real-time feedback force from the scraper numbers on one side is continuously acquired to determine whether the problematic scraper is still functioning.

[0160] Step 6444: If the real-time feedback force of the adjusted single-sided scraper number is greater than 0, continue to update the contact adjustment angle until the real-time feedback force of the single-sided scraper number is equal to 0.

[0161] If the real-time feedback force of the adjusted single-sided squeegee number is greater than 0, it means that the single-sided squeegee is still in effect. It is impossible to determine whether the problematic squeegee is still in effect. Therefore, it is necessary to continue to add layers to update the contact adjustment angle until the single-sided squeegee no longer has an effect, that is, the real-time feedback force of the single-sided squeegee is 0. Then the problematic squeegee will no longer have an effect and will not affect the printing.

[0162] Step 6445: When the contact adjustment angle is the preset maximum adjustment angle and the real-time feedback force of the single-sided scraper number is still greater than 0, output a scraper alarm signal.

[0163] The maximum adjustment angle refers to the maximum limit of adjustment allowed by the scraper structure, for example, a 90-degree right angle. This angle is obtained by those skilled in the art through pre-setting.

[0164] The scraper alarm signal is an alarm command signal used to indicate that the scraper can no longer be repaired by adjusting the angle. This signal is pre-set by those skilled in the art and is triggered when it is determined that even reaching the maximum adjustment angle cannot reduce the real-time feedback force to 0.

[0165] When the contact adjustment angle is the preset maximum adjustment angle and the real-time feedback force of the single-sided scraper number is still greater than 0, it indicates that the faulty scraper cannot be made to fail by adjusting the contact adjustment angle. At this time, a scraper alarm signal is output.

[0166] The solutions after outputting a scraper alarm signal include:

[0167] Step 64450: Within the same side secondary scraper number group, starting from the problem scraper number and moving away from the main scraper number, determine the outer scraper number group and the number of outer scraper numbers within the outer scraper number group. The outer scraper number group includes the problem scraper number.

[0168] The outer scraper numbering group refers to a numbering group consisting of a continuous section of scrapers, starting from the problematic scraper and extending outwards away from the main scraper, including the problematic scraper. This numbering group is determined based on the positional relationship between the problematic scraper number and its corresponding scraper.

[0169] The number of outer scraper numbers refers to the total number of scrapers contained in the outer scraper number group. This number is obtained by statistically counting the numbers in the outer scraper number group.

[0170] Step 64451: Determine the number of additional scraper numbers needed based on the number of outer scraper numbers.

[0171] The number of additional scraper numbers required refers to the number of scrapers that need to be replaced to fill the gaps left after the outer scraper group is removed. The number of additional scraper numbers required is determined by the number of outer scraper numbers.

[0172] Step 64452: Determine the remaining scraper number groups based on the same-side secondary scraper number groups.

[0173] The remaining scraper number group refers to the number group composed of the normal scrapers remaining after excluding the outer scraper number group. This remaining scraper number group is formed by removing the outer scraper number group from the secondary scraper number group on the same side, and then adding the normal main scraper number and the secondary scraper number group on the remaining side.

[0174] Step 64453: Update the overall scraper number group based on the remaining scraper number groups and the number of scraper numbers that need to be added.

[0175] The overall scraper number group refers to the set of numbers consisting of all main scrapers that need to be updated, plus all secondary scrapers, after removing the outer scraper number group. This number group is obtained by adding the number of scraper number groups that need to be updated to the remaining scraper number groups.

[0176] Updating the overall scraper number group refers to redistributing and sorting all scraper numbers according to the pattern area and the smooth area after removing problematic scrapers and adding normal scrapers.

[0177] Step 64454: Control the area where the outer doctor blade number group moves out of the printing plate cylinder surface, and define the length of the area where the outer doctor blade number group moves out of the printing plate cylinder surface as the moving length.

[0178] The moving length refers to the displacement of the outer scraper group when it moves out of the roller area. This length is calculated by multiplying the number of scrapers in the outer scraper group by the fixed length of a single scraper.

[0179] Controlling the outer doctor blade number group to move out of the area on the printing cylinder surface means controlling the doctor blade corresponding to the outer doctor blade number group to move laterally out so that it no longer contacts the cylinder surface.

[0180] Step 64455: Based on the overall squeegee number group, determine the updated main squeegee number and the updated secondary squeegee number. Control the overall squeegee number group to move towards the outer squeegee number group by the moving length so that the squeegee corresponding to the updated main squeegee number falls into the pattern area. Control the ink droplet to fall into the pattern area. Control the squeegee corresponding to the updated secondary squeegee number to rotate according to the guide rotation angle to scrape the ink that accidentally fell into the glossy area to the pattern area and control the ink to achieve gravure printing.

[0181] Updating the main scraper number refers to the new main scraper number corresponding to the pattern area after the overall scraper number group has been rearranged. This number is determined through the reallocation of the overall scraper number group.

[0182] Updating the secondary scraper number refers to the new secondary scraper number corresponding to the smooth area after the overall scraper number group has been rearranged. This number is also determined based on the allocation result of the overall scraper number group.

[0183] The purpose of controlling the overall doctor blade group to move towards the outermost doctor blade group by a specified distance is to ensure that all doctor blades corresponding to the overall doctor blade group are in contact with the printing cylinder surface, thereby effectively controlling ink distribution. Once in position, ink is controlled to drip onto the pattern area, while simultaneously the doctor blade corresponding to the updated secondary doctor blade rotates at a set guide angle. This ensures that even if a small amount of ink accidentally falls into the glossy area, it can be promptly scraped onto the pattern area, achieving precise ink control.

[0184] This also includes:

[0185] Step 6446: When an ink dripping signal is received, determine the similar reference number group and the remaining number groups based on the comparison number group according to the direction away from the main doctor blade number and the number of reference number groups.

[0186] The similarity reference number group refers to a segment of scraper numbers in the comparison number group, starting from the number closest to the main scraper number, that is, the same number as the reference number group, and is used as the scraper group that is symmetrical and corresponding to the reference number group. This number group is determined by sequentially extracting numbers from the comparison number group based on the number of numbers in the reference number group.

[0187] The remaining numbering group refers to the scraper numbering group remaining after removing the similar reference numbering group from the comparison numbering group. This numbering group is directly determined by the remaining part after removing the similar reference numbering group from the comparison numbering group.

[0188] Step 6447: Obtain the ink feedback strength of the edge ink of the remaining numbered groups.

[0189] Edge ink feedback force refers to the ink feedback force generated when ink acts on the corresponding doctor blades of other numbered groups. This feedback force is obtained through real-time data acquisition from the corresponding doctor blades of other numbered groups.

[0190] Step 6448: If the edge ink feedback force exists, determine the actual guide rotation angle based on the reference number group and the comparison number group.

[0191] The actual guide rotation angle refers to the current guide rotation angle used by the doctor blade corresponding to the reference number group and the comparison number group. This angle is obtained by reading from the current operating parameters of the printing press.

[0192] Step 6449: Calculate the leak-proof rotation angle based on the actual guide rotation angle and the preset leak-proof angle.

[0193] The leak-proof angle refers to the unit adjustment angle set to prevent ink from leaking out from the edge. This leak-proof angle is preset by someone skilled in the art.

[0194] The anti-leakage rotation angle refers to the target adjustment angle for preventing ink leakage, obtained by adding the anti-leakage angle to the actual guide rotation angle. This angle is calculated by adding the actual guide rotation angle to the preset anti-leakage angle.

[0195] Step 64410: Adjust the doctor blades corresponding to the reference number group and the comparison number group according to the anti-leakage rotation angle and continue to obtain edge ink feedback force.

[0196] This step involves adjusting the doctor blades corresponding to the baseline and comparison number groups according to the calculated anti-leakage rotation angle to reduce ink leakage from the edges. After adjustment, the edge ink feedback force is continuously acquired to determine the effectiveness of the anti-leakage adjustment.

[0197] Step 64411: If the adjusted edge ink feedback force still exists, continue to update the anti-leakage rotation angle.

[0198] If the edge ink feedback force still exists after the adjustment, it means that the edge ink feedback force is still detected after one adjustment. Then, the leak prevention angle is added again on the basis of the original leak prevention rotation angle, and the adjustment is iterated until the edge ink feedback force is no longer present or the leak prevention rotation angle reaches the limit angle, such as a 90-degree right angle, then the update stops.

[0199] This also includes:

[0200] Step 600: Count the number of main scraper numbers corresponding to the pattern areas along the roller axis.

[0201] The main quantity refers to the total number of main scraper numbers identified as corresponding pattern areas along the roller axis. This quantity is obtained by statistically counting the main scraper numbers.

[0202] Step 601: When the main number is greater than 1, determine the interval sub-scraper number based on the main scraper number and count the interval number.

[0203] The interval secondary scraper number refers to the secondary scraper number located between two adjacent main scrapers if multiple main scraper numbers exist. This interval secondary scraper number is determined by looking up the secondary scraper number in the middle area based on the axial position relationship of the main scraper numbers.

[0204] The number of intervals refers to the total number of interval secondary scrapers between two adjacent main scrapers. This number is obtained by statistically counting the interval secondary scraper numbers.

[0205] Step 602: If the number of intervals is less than the preset interval threshold, update the secondary scraper number to the primary scraper number.

[0206] The interval threshold refers to the critical number of secondary scrapers used to determine whether the interval between any two main scraper numbers is too large. This interval threshold is preset by those skilled in the art.

[0207] If the number of intervals is less than the preset interval threshold, it means that the interval between two adjacent main scrapers is too small. In this case, the interval sub-scraper number is updated to the main scraper number to optimize the scraper layout.

[0208] Among them, the methods for handling intervals greater than a preset interval threshold include:

[0209] Step 603: Divide the interval secondary scraper numbers into positive rotation scraper numbers and negative rotation scraper numbers according to the number of intervals.

[0210] The positive-rotation scraper number refers to the scraper number among the secondary scrapers that rotates towards one side of the main scraper when the main scraper intervals are too far apart. This positive-rotation scraper number is determined based on the relationship between the number of intervals and the position of the main scraper numbers.

[0211] The counter-rotating scraper number refers to the scraper number that rotates towards the other side of the main scraper when the main scraper interval is too far apart. It is also determined based on the relationship between the number of intervals and the position of the other side of the main scraper.

[0212] Step 604: Control the squeegee corresponding to the forward-rotating squeegee number to rotate according to the preset guiding forward rotation angle, and the squeegee corresponding to the reverse-rotating squeegee number to rotate according to the preset guiding reverse rotation angle, so as to scrape the ink that accidentally falls into the glossy area to the pattern area and control the ink to achieve gravure printing.

[0213] The guide rotation angle refers to the rotation angle set for the doctor blade corresponding to the positive rotation doctor blade number, used to guide the ink to one side of the pattern area. This angle is obtained by those skilled in the art through pre-setting.

[0214] The guide counter-rotation angle refers to the rotation angle set for the doctor blade corresponding to the counter-rotation doctor blade number, used to guide the ink to the other side of the pattern area. This angle is obtained in the same way as the guide forward rotation angle, and will not be repeated here.

[0215] By controlling the squeegees corresponding to the forward and reverse squeegee numbers to rotate according to preset forward and reverse squeegee angles, it can be ensured that even if a small amount of ink accidentally falls into the glossy area, it can be promptly scraped and guided to the pattern areas on both sides by these rotating squeegees.

[0216] Based on the same inventive concept, embodiments of the present invention provide an intelligent gravure printing blade control system.

[0217] A gravure printing intelligent scraper control system includes:

[0218] The acquisition module is used to acquire the doctor blade number, real-time feedback force, roller rotation status, ink feedback force, main ink force, real-time feedback force, and edge ink feedback force.

[0219] The memory stores a computer program that can be loaded by a processor and executed to control a gravure intelligent scraper.

[0220] The processor loads and executes programs from memory.

[0221] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0222] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling an intelligent scraper in gravure printing, characterized in that, include: Step 1: In response to the power-on signal, control several doctor blades along the cylinder axis to abut against the surface of the printing cylinder according to a preset detection pressure, and obtain the doctor blade number and the real-time feedback force of the printing cylinder surface to the doctor blade corresponding to the corresponding doctor blade number and the cylinder rotation state. The cylinder rotation state includes the real-time rotation speed, rolling time and cylinder rotation angle of the printing cylinder. Step 2: Combine the real-time feedback force with the roller rotation state to plot the force change curve, which is the curve of real-time feedback force and rolling time; Step 3: Obtain the pattern of force change based on the force change curve; Step 4: When the intensity change pattern falls into the preset pattern curve pattern, determine that the area on the printing cylinder surface corresponding to the squeegee number of the intensity change pattern is the pattern area, and define the squeegee number corresponding to the pattern area as the main squeegee number. Step 5: When the force change pattern falls into the preset smooth surface curve pattern, determine that the area on the printing cylinder surface corresponding to the doctor blade number of the force change pattern is the smooth surface area, and define the doctor blade number corresponding to the smooth surface area as the secondary doctor blade number. Step 6: In response to the preset gravure printing signal, control the ink droplets to fall on the pattern area, and control the squeegee corresponding to the secondary squeegee number to rotate according to the preset guide rotation angle to scrape the ink that accidentally fell into the glossy area to the pattern area and control the ink to achieve gravure printing.

2. The gravure printing intelligent scraper control method according to claim 1, characterized in that, Also includes: Step 60: When a preset ink dripping signal is received, obtain the ink feedback force of the ink to the secondary doctor blade number; Step 61: If the ink feedback force is greater than the preset ink threshold, accumulate the ink adhesion time; Step 62: When the ink adhesion time is greater than the preset dwell time threshold, calculate the fine-tuning angle based on the guide rotation angle and the preset interval angle; Step 63: Control the doctor blade corresponding to the secondary doctor blade number to adjust the fine-tuning angle and continue to obtain ink feedback force; Step 64: If the adjusted ink feedback force is still greater than the ink threshold and the corresponding ink adhesion time is greater than the dwell time threshold, continue to update the fine-tuning angle.

3. The gravure printing intelligent scraper control method according to claim 1, characterized in that, Also includes: Step 65: When a preset ink dripping signal is received, obtain the main ink force of the ink on the main doctor blade number; Step 66: If the main ink force is greater than the preset main force threshold, determine the numbers of the adjacent two auxiliary doctor blades based on the main doctor blade number; Step 67: After adjusting the numbers of the adjacent secondary doctor blades to the numbers of the primary doctor blades, continue to obtain the main ink pressure; Step 68: If the adjusted main ink force is still greater than the main force threshold, continue to update the main doctor blade number.

4. The gravure printing intelligent scraper control method according to claim 2, characterized in that, It also includes a method for verifying the sensitivity of the scraper, which includes: Step 640: Obtain the real-time feedback force of the secondary scraper number groups on both sides of the main scraper number; Step 641: Count the number of numbers in the secondary scraper number groups on both sides respectively; Step 642: Define the number groups of the two secondary scrapers corresponding to the smaller number as the baseline number group, and define the number groups of the two secondary scrapers corresponding to the larger number as the comparison number group. Starting from the secondary scraper numbers on both sides that are closer to the main scraper number, compare the real-time feedback intensity in the baseline number group with the real-time feedback intensity in the comparison number group to obtain the comparison result. Step 643: When the comparison results are inconsistent, determine the real-time feedback force with the smaller value based on the comparison results, and define the secondary scraper number corresponding to the real-time feedback force with the smaller value as the problem scraper number. Step 644: Output the preset scraper adjustment signal and the problem scraper number.

5. The gravure printing intelligent scraper control method according to claim 4, characterized in that, It also includes a solution method after outputting the preset scraper adjustment signal and the problem scraper number, the method including: Step 6440: Determine the same-side auxiliary scraper number group and the single-side scraper number close to the main scraper number based on the problem scraper number, wherein the same-side auxiliary scraper number group includes the problem scraper number; Step 6441: Determine the current guide rotation angle based on the number group of the auxiliary scraper on the same side; Step 6442: Calculate the contact adjustment angle based on the current guide rotation angle and the preset adjustment angle; Step 6443: Control the scraper corresponding to the same side auxiliary scraper number group to adjust according to the contact adjustment angle and continue to obtain the real-time feedback force of the single-side scraper number; Step 6444: If the real-time feedback force of the adjusted single-sided scraper number is greater than 0, continue to update the contact adjustment angle until the real-time feedback force of the single-sided scraper number is equal to 0. Step 6445: When the contact adjustment angle is the preset maximum adjustment angle and the real-time feedback force of the single-sided scraper number is still greater than 0, output a scraper alarm signal.

6. The gravure printing intelligent scraper control method according to claim 5, characterized in that, Solutions after a scraper alarm signal is output include: Step 64450: Within the same side secondary scraper number group, starting from the problem scraper number and moving away from the main scraper number, determine the outer scraper number group and the number of outer scraper numbers within the outer scraper number group, wherein the outer scraper number group includes the problem scraper number; Step 64451: Determine the number of additional scraper numbers needed based on the number of outer scraper numbers; Step 64452: Determine the remaining scraper number groups based on the same-side auxiliary scraper number groups; Step 64453: Update the overall scraper number group based on the remaining scraper number groups and the number of scraper numbers that need to be added; Step 64454: Control the area where the outer doctor blade number group moves out of the printing cylinder surface, and define the length of the area where the outer doctor blade number group moves out of the printing cylinder surface as the moving length; Step 64455: Based on the overall squeegee number group, determine the updated main squeegee number and the updated secondary squeegee number. Control the overall squeegee number group to move towards the outer squeegee number group by the moving length so that the squeegee corresponding to the updated main squeegee number falls into the pattern area. Control the ink droplet to fall into the pattern area. Control the squeegee corresponding to the updated secondary squeegee number to rotate according to the guide rotation angle to scrape the ink that accidentally fell into the glossy area to the pattern area and control the ink to achieve gravure printing.

7. The gravure printing intelligent scraper control method according to claim 4, characterized in that, Also includes: Step 6446: When an ink dripping signal is received, determine the similar reference number group and the remaining number groups based on the comparison number group according to the direction away from the main doctor blade number and the number of reference number groups; Step 6447: Obtain the feedback strength of the ink on the edge ink of the remaining numbered groups; Step 6448: If edge ink feedback force exists, determine the actual guide rotation angle based on the reference number group and the comparison number group; Step 6449: Calculate the leak-proof rotation angle based on the actual guide rotation angle and the preset leak-proof angle; Step 64410: Adjust the control blades corresponding to the reference number group and the comparison number group according to the anti-leakage rotation angle and continue to obtain edge ink feedback force; Step 64411: If the adjusted edge ink feedback force still exists, continue to update the anti-leakage rotation angle.

8. The gravure printing intelligent scraper control method according to claim 1, characterized in that, Also includes: Step 600: Count the main quantity of the main scraper numbers corresponding to the pattern areas along the roller axis; Step 601: When the main number is greater than 1, determine the interval sub-scraper number based on the main scraper number and count the interval number; Step 602: If the number of intervals is less than the preset interval threshold, update the interval secondary scraper number to the primary scraper number.

9. The gravure printing intelligent scraper control method according to claim 8, characterized in that, If the number of intervals exceeds a preset interval threshold, the following methods are available: Step 603: Divide the interval secondary scraper numbers into positive rotation scraper numbers and negative rotation scraper numbers according to the number of intervals; Step 604: Control the squeegee corresponding to the forward-rotating squeegee number to rotate according to the preset guiding forward rotation angle, and the squeegee corresponding to the reverse-rotating squeegee number to rotate according to the preset guiding reverse rotation angle, so as to scrape the ink that accidentally falls into the glossy area to the pattern area and control the ink to achieve gravure printing.

10. A gravure printing intelligent scraper control system, characterized in that, include: The acquisition module is used to acquire the doctor blade number, real-time feedback force, roller rotation status, ink feedback force, main ink force, real-time feedback force, and edge ink feedback force. A memory for storing a program for a gravure intelligent scraper control method as described in any one of claims 1 to 9; The processor loads and executes programs from memory.

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