A printing device capable of intelligently correcting deviation and a deviation calculation method

Abstract

The present invention provides a printing device capable of intelligently correcting deviations, comprising a coiling device, a printing device and a winding device arranged in sequence, and also comprising a correction device for adjusting the relative position in the length direction between the secondary substrate and the plate cylinder, wherein the correction device is located at the feed port of the printing device. The beneficial effects of the present invention are as follows: by arranging a correction device for adjusting the relative position in the length direction between the secondary substrate and the plate cylinder, when an error occurs in the printing of the secondary substrate, the correction device is adjusted so that the relative position in the length direction between the secondary substrate and the plate cylinder is extended or shortened, and relative sliding of the secondary substrate during printing is avoided when the adjustment is performed, so as to realize the correction of the position of the overprint pattern and the color position on the secondary substrate, thereby obtaining a product with higher comprehensive performance.

Description

[Technical field]

[0001] The present invention relates to the field of printing, and in particular to a printing device capable of intelligently correcting deviations and a deviation calculation method. [Background technology]

[0002] Printing is a means of information exchange, dissemination of cultural and scientific knowledge, and it is closely related to people's daily lives. In recent decades, with the development of the economy and the improvement of people's living standards and aesthetic requirements, printed products as a commodity must meet people's needs, and printing presses as equipment for printing products occupy a pivotal position in the printing industry. Overprinting refers to the requirement for overlapping registration of various color plates in multi-color printing, that is, the single-color printing plates with different screen angles obtained after the original is separated are overlapped and matched in sequence according to the color sequence of the printing plates, and finally the printed products with the same level and tone as the original are printed; and secondary overprinting refers to the second printing after the first printing, so as to achieve two overprints, so that the pattern of the printed product is fuller and the sense of level is stronger. The prior art printing presses that realize secondary overprinting mainly monitor the pattern position on the substrate through the identification component, change the speed of the paper fed into the overprinting system, and thus realize the positioning of the overprinting pattern and the pattern of the plate roller. However, when the speed of the paper fed into the overprinting system is changed, the paper will slide relative to each other, causing the pattern of the paper to deform. There are also problems such as uneven ink layer on the paper and the need for tedious and complicated initial debugging. In view of the problems existing in the secondary overprinting of the above-mentioned printing presses, the inventor of this case conducted an in-depth study on the problem, which led to the creation of this case. [Summary of the invention]

[0003] In view of the problems in the prior art that when changing the speed of paper fed into the overprinting system during secondary overprinting, relative sliding will occur, resulting in deformation of the pattern of the printed substrate and uneven ink layer of the printed substrate, the present invention provides a printing device that can intelligently correct deviations and a deviation calculation method. The printing device includes a correction device for adjusting the relative position in the length direction between the secondary printing material and the printing plate cylinder.

[0004] The present invention is implemented as follows: a printing device that can intelligently correct deviations includes a roll feeding device, a printing device and a reeling device that are arranged in sequence, and also includes a deviation correction device for adjusting the relative position between the secondary printing material and the printing plate cylinder in the length direction; the deviation correction device is located at the feed port of the printing device.

[0005] Furthermore, the correction device includes a first correction roller, a second correction roller and a first correction cylinder for driving the first correction roller to move up and down, which are parallel and at different heights, and one end of the first correction roller is installed on the movable end of the first correction cylinder.

[0006] Furthermore, a first driving motor for driving the first error correction roller to rotate is installed at one end of the first error correction roller, and a second driving motor for driving the second error correction roller to rotate is installed at one end of the second error correction roller.

[0007] Furthermore, it also includes an installation frame, which includes a first installation column for installing the printing device, a second installation column for rolling and winding, and a horizontal installation beam erected on the top of the first installation column and the second installation column, the rolling device and the winding device are respectively located on both sides of the second installation column, and the correction device is installed on the horizontal installation beam.

[0008] Furthermore, a vertical slide groove is provided on the horizontal mounting beam, and two ends of the first error correction roller are installed on the vertical slide groove and can move along the length direction of the slide groove.

[0009] Furthermore, one end of the first error correction roller away from the first error correction cylinder is installed at the movable end of the first error correction auxiliary cylinder, and the first error correction cylinder and the first error correction auxiliary cylinder are fixedly installed on the horizontal mounting beam.

[0010] Furthermore, the correction device includes a first main correction roller and one or more first auxiliary correction rollers, the first main correction roller and the first auxiliary correction roller are at the same height and are both installed on a first correction frame, the first correction cylinder is fixedly installed on the horizontal mounting beam, and the movable end of the first correction cylinder is fixedly installed on the first correction frame.

[0011] Furthermore, the first driving motor is fixedly mounted on one end of the first main correction roller, a first synchronous wheel is mounted on the rotating shaft of the first driving motor, a first transmission shaft is mounted on the first correction frame, a second synchronous wheel and one or more transmission wheels are mounted on the first transmission shaft, the first synchronous wheel and the second synchronous wheel are driven by a belt, a third synchronous wheel is mounted on one end of each of the first auxiliary correction rollers, and each of the transmission wheels is driven by a belt to one of the third synchronous wheels.

[0012] Furthermore, the first error correction frame is provided with a vertical slide bar for guiding, and the horizontal mounting beam is provided with a vertical slide groove corresponding to the vertical rod.

[0013] On the other hand, a deviation calculation method includes the following steps:

[0014] Step 1, transferring the standard pixel photo of the secondary substrate after printing to the microprocessor for storage;

[0015] Step 2: Take a picture with a CCD camera and transmit the picture to a microprocessor;

[0016] Step 3: The microprocessor transmits the photographed image and the standard pixel photo to the data processing unit for processing, and calculates the printing deviation d (d1, d2, d3, d4...) of each color;

[0017] Step 4. When the printing deviation of each color is 0, repeat steps 2 to 4. When the printing deviation of any color is not 0, redesign and control the feeding device, winding device, deviation correction device, first tension adjustment component, second tension adjustment component and each printing component on the printing device according to the requirements for tension and printing speed, and repeat steps 2 to 4.

[0018] The advantages of the present invention are:

[0019] (1) By providing a correction device for adjusting the relative position between the secondary substrate and the plate cylinder in the length direction, when an error occurs in the printing of the secondary substrate, the correction device is adjusted to extend or shorten the relative position between the secondary substrate and the plate cylinder in the length direction, and relative sliding of the secondary substrate during printing is avoided when the correction device is adjusted, thereby correcting the position of the overprint pattern and the color position on the secondary substrate, thereby obtaining a product with higher comprehensive performance.

[0020] (2) By setting up the detection component, timely and accurate monitoring of the pattern position and color position on the secondary substrate is achieved, so that the control system can obtain information in a timely and accurate manner when an error occurs in the printing of the secondary substrate, and adjust the speed of the feeding device, the speed of the winding device, and the up and down movement and speed of the correction device through the obtained information. The speed of the feeding device and the winding device is reasonably adjusted to compensate for the errors in the position and color position of the overprinted pattern caused by the deformation of the secondary substrate when the correction device moves up and down, thereby achieving autonomous monitoring and self-adjustment of the position and color of the overprinted pattern on the secondary substrate, thereby ensuring the product quality of the printing machine during overprinting.

[0021] (3) By setting the first tension adjustment component and the second tension adjustment component, when the deviation correction device adjusts the relative position between the secondary substrate and the plate cylinder in the length direction, the first tension adjustment component and the second tension adjustment component start to work to adjust the tension of the secondary substrate, thereby ensuring that the secondary substrate will not be damaged due to the excessive tension generated by the deviation correction device when correcting the secondary substrate.

[0022] (4) The anilox roller of the present invention adopts a modified carbon fiber roller core, and a ceramic layer is coated on the surface, which is ground, polished and laser engraved. The modified carbon fiber roller core greatly reduces the weight of the roller body, so the friction of the roller is reduced, the deformation of the roller is reduced, the ink transfer uniformity is improved, and the service life is extended. To a certain extent, the downtime of the printing press is reduced and the production efficiency is improved. During the cleaning or replacement process, it is easier to operate, which reduces the workload of the operator and reduces the hazard index. The modified carbon fiber roller core also exhibits extremely small offset performance. In addition, the mesh shape of the anilox roller is designed using the equation provided by the present invention and has good uniformity, ink transfer efficiency and ink storage performance.

[0023] (5) By using the deviation calculation method provided by the present invention, the printing deviation of each color can be calculated. When the printing deviation of any color is not zero, the tension and printing speed requirements can be redesigned according to the current error amount. The control system can regulate the movement and operation speed of each printing component on the feeding device, the winding device, the deviation correction device, the first tension adjustment component, the second tension adjustment component and the printing device, so that the position of the overprint pattern and the color position on the secondary substrate can be adjusted in a timely and accurate manner. During the entire overprinting process, the printing machine can perform autonomous regulation, so that the deviation of the position of the overprint pattern and the color position on the secondary substrate can be maintained within a smaller error range, thereby improving the comprehensive performance of the overprinted product.

Brief Description of the Drawings

[0024] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of a preferred printing device capable of intelligently correcting deviations;

[0026] Figure 2 This is a partial view of a preferred horizontal mounting beam of the present invention;

[0027] Figure 3 It is a schematic diagram of the deviation correction device of the present invention;

[0028] Figure 4 is a schematic diagram of a more preferred deviation-correcting device of the present invention;

[0029] Figure 5 It is a partial diagram of a preferred printing device of the present invention;

[0030] Figure 6 Schematic diagram of a preferred anilox roller of the present invention;

[0031] Figure 7 It is a control relationship diagram of the preferred detection component and control system of the present invention.

[0032] In the figure:

[0033] 1-correction device; 11-first error correction roller; 12-second error correction roller; 13-first error correction cylinder; 14-first drive motor; 141-first synchronous wheel; 15-first error correction auxiliary cylinder; 16-first main error correction roller; 17-first auxiliary error correction roller; 18-first error correction frame; 181-vertical slide bar; 2-rolling device; 3-printing device; 31-central impression cylinder; 32-dryer between color groups; 33-printing unit; 331-anilox roller; 332-mesh; 4-winding device; 5-mounting frame; 51-first mounting column; 52-second mounting column; 53-horizontal mounting beam; 6-vertical slide groove; 7-first transmission shaft; 71-second synchronous wheel ;72-transmission wheel;8-belt;9-control system;91-microprocessor;92-data processing unit;93-data storage unit;94-correction device control unit;95-roll feeding device control unit;96-winding device control unit;97-external input unit;98-first tension control unit;99-second tension control unit;10-detection component;101-CCD camera;19-first tension adjusting component;191-first tension roller;192-first tension adjusting slot;20-second tension adjusting component;201-second tension roller;202-second tension adjusting slot;21-first tension adjusting cylinder;22-second tension adjusting cylinder. [Specific implementation method]

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] like Figure 1 As shown, a printing device capable of intelligently correcting deviation includes a deviation correction device 1 for adjusting the relative position between the secondary printing material and the printing plate cylinder in the length direction.

[0036] By providing a correction device 1 for adjusting the relative position between the secondary substrate and the plate cylinder in the length direction, when an error occurs in the printing of the secondary substrate, the correction device 1 is adjusted to extend or shorten the relative position between the secondary substrate and the plate cylinder in the length direction, and relative sliding of the secondary substrate during printing is avoided when the adjustment is performed, thereby correcting the position of the overprint pattern and the color position on the secondary substrate, thereby obtaining a product with higher comprehensive performance.

[0037] As a preferred embodiment, it also includes a roll-feeding device 2, a printing device 3 and a roll-reeling device 4 which are arranged in sequence, and the deviation-correcting device 1 is located at the feed port of the printing device 3.

[0038] like Figure 2 and 3 As shown, as a preferred embodiment, the correction device 1 includes a first correction roller 11 and a second correction roller 12 which are parallel and at different heights, and a first correction cylinder 13 for driving the first correction roller 11 to move up and down, and one end of the first correction roller 11 is installed on the movable end of the first correction cylinder 13.

[0039] As a preferred embodiment, a first driving motor 14 for driving the first error correction roller 11 to rotate is installed at one end thereof, and a second driving motor (not shown) for driving the second error correction roller 12 to rotate is installed at one end thereof.

[0040] As a preferred embodiment, it also includes an installation frame 5, which includes a first installation column 51 for installing the printing device 3, a second installation column 52 for rolling and winding, and a horizontal installation beam 53 erected on the top of the first installation column 51 and the second installation column 52, the rolling device 2 and the winding device 4 are respectively located on both sides of the second installation column 52, and the correction device 1 is installed on the horizontal installation beam 53.

[0041] As a preferred embodiment, a vertical slide groove 6 is provided on the horizontal mounting beam 53, and both ends of the first error correction roller 11 are installed on the vertical slide groove 6 and can move along the length direction of the slide groove.

[0042] As a preferred embodiment, the correction device 1 also includes a first correction auxiliary cylinder 15, the first correction roller 11 is installed at the movable end of the first correction auxiliary cylinder 15 away from the first correction cylinder 13, and the first correction cylinder 13 and the first correction auxiliary cylinder 15 are fixedly installed on the horizontal mounting beam 53.

[0043] like Figure 1 and 4As shown, as a more preferred embodiment, the correction device 1 includes a first main correction roller 16 and one or more first auxiliary correction rollers 17, the first main correction roller 16 and the first auxiliary correction roller 17 are at the same height and are both installed on the first correction frame 18, the first correction cylinder 13 is fixedly installed on the horizontal mounting beam 53, and the movable end of the first correction cylinder 13 is fixedly installed on the first correction frame 18.

[0044] By providing a first main error correction roller 16 and one or more first auxiliary error correction rollers 17, when an error occurs in the printing of the secondary substrate, the error correction device 1 can be more accurately adjusted to avoid inaccurate displacement of the error correction device 1, thereby avoiding the relative position change in the length direction between the secondary substrate and the printing plate cylinder not meeting the requirements, so that when errors occur in printing, timely and accurate adjustments can be made to avoid waste.

[0045] As a preferred embodiment, the first drive motor 14 is fixedly mounted on one end of the first main correction roller 16, a first synchronous wheel 141 is mounted on the rotating shaft of the first drive motor 14, a first transmission shaft 7 is mounted on the first correction frame 18, a second synchronous wheel 71 and one or more transmission wheels 72 are mounted on the first transmission shaft 7, the first synchronous wheel 141 and the second synchronous wheel 71 are driven by a belt 8, a third synchronous wheel is mounted on one end of each of the first auxiliary correction rollers 17, and each of the transmission wheels 72 is driven by a belt 8 to one of the third synchronous wheels.

[0046] As a preferred embodiment, a vertical slide bar 181 for guiding is provided on the first error correction frame 18, and a vertical slide groove 6 corresponding to the vertical rod is provided on the horizontal mounting beam 53.

[0047] As a preferred embodiment, both ends of the second error correction roller 12 are mounted on the horizontal mounting beam 53 and can rotate along the axial direction thereof.

[0048] like Figure 1 and 7 As shown, as a preferred embodiment, it also includes a detection component 10 for detecting the length direction position deviation between the secondary substrate and the plate cylinder and a control system 9 for controlling the secondary substrate feeding speed and the movement of the correcting device 1, the detection component 10 is installed at the discharge port position of the printing device 3, and the output end of the detection component 10 is connected to the input end of the control system 9, and the output end of the control system 9 is connected to the output ends of the feeding device 2, the winding device 4, and the correcting device 1.

[0049] By setting up the detection component 10, timely and accurate monitoring of the pattern position and color position on the secondary substrate is achieved, so that the control system 9 can obtain information in a timely and accurate manner when an error occurs in the printing of the secondary substrate, and adjust the speed of the feeding device 2, the speed of the winding device 4 and the up and down movement and speed of the correction device 1 through the obtained information, wherein the speed of the feeding device 2 and the winding device 4 is reasonably regulated to compensate for the errors in the overprint pattern position and color position caused by the deformation of the secondary substrate when the correction device 1 moves up and down, thereby achieving autonomous monitoring and self-adjustment of the overprint pattern position and color position on the secondary substrate, ensuring the product quality of the printing machine during overprinting.

[0050] As a preferred embodiment, the control system 9 includes a microprocessor 91, a data processing unit 92, a data storage unit 93, a correction device control unit 94, a roll feeding device control unit 95, a roll winding device control unit 96 and an external input unit 97. The data processing unit 92 and the data storage unit 93 are bidirectionally connected to the microprocessor 91, the output end of the detection component 10 is connected to the input end of the microprocessor 91, the output end of the microprocessor 91 is connected to the input end of the correction device control unit 94, the roll feeding device control unit 95, and the roll winding device control unit 96; the output end of the external input unit 97 is connected to the input end of the microprocessor 91.

[0051] As a preferred implementation, the detection component 10 includes a CCD camera 101, and the CCD camera 101 faces the upper surface of the secondary substrate.

[0052] As a preferred embodiment, the feed port and the discharge port of the printing device 3 are respectively provided with a first tension adjusting component 19 and a second tension adjusting component 20 for adjusting the tension of the secondary substrate, the first tension adjusting component 19 is located on the first mounting column 51, and the second tension adjusting component 20 is located on the horizontal mounting beam 53.

[0053] By setting the first tension adjusting component 19 and the second tension adjusting component 20, when the deviation correcting device 1 adjusts the relative position between the secondary substrate and the plate cylinder in the length direction, the first tension adjusting component 19 and the second tension adjusting component 20 start to work to adjust the tension of the secondary substrate, ensuring that the secondary substrate will not be damaged due to the excessive tension generated by the deviation correcting device 1 when correcting the error.

[0054] like Figure 5As shown, as a preferred embodiment, the first tension adjusting component 19 includes a first tension adjusting cylinder and a first tension roller 191, a first tension adjusting groove 192 is provided at a position corresponding to the first mounting column 51 and the first tension roller 191, both ends of the first tension roller 191 are installed in the first tension adjusting groove 192 and can move along the length direction of the first tension adjusting groove 192, the first tension adjusting cylinder is fixedly installed on the first mounting column 51, and one end of the first tension roller 191 is fixedly installed on the movable end of the first tension adjusting cylinder.

[0055] like Figure 2 As shown, as a preferred embodiment, the second tension adjusting assembly 20 includes a second tension adjusting cylinder and a second tension roller 201, a second tension adjusting groove 202 is provided at a position corresponding to the horizontal mounting beam 53 and the second tension roller 201, both ends of the second tension roller 201 are installed in the second tension groove and can move along the length direction of the second tension adjusting groove 202, the second tension adjusting cylinder is fixedly installed on the horizontal mounting beam 53, and one end of the second tension roller 201 is fixedly installed on the movable end of the second tension adjusting cylinder.

[0056] As a preferred embodiment, the control system 9 also includes a first tension control unit 98 and a second tension control unit 99 for controlling the first tension adjusting cylinder 21 and the second tension adjusting cylinder 22, and the input ends of the first tension control unit 98 and the second tension control unit 99 are connected to the output end of the microprocessor 91.

[0057] like Figure 5 and 6 As shown, as a preferred embodiment, the printing device 3 includes a central impression roller 31, a color group dryer 32 and at least two printing units 33, the printing units 33 are distributed around the central impression roller 31, the color group dryer 32 is arranged between two adjacent printing units 33, and the printing unit 33 includes an anilox roller 331 for transferring ink, and the mesh holes 332 of the anilox roller 331 gradually become lighter or larger from both sides to the middle.

[0058] The shape of the mesh 332 of the anilox roller can be rhombus, triangle, hexagon, sphere, groove, etc., but the more preferred surface curvature of the mesh 332 of the anilox roller 331 from both sides to the middle satisfies: The depth of the mesh 332 from both sides to the middle of the anilox roller 331 satisfies: The mesh radius can be Calculate and solve, the mesh radius is |x|, i in the above equation is a positive integer; l is the length of the anilox roller 331, the origin of the xyz space coordinate is set at l / 2, n is the total number of meshes 332 on the same horizontal line from the origin of the xyz space coordinate to one side of the anilox roller 331, and n≥1, n i is the number of the i-th mesh on the same horizontal line from the origin of the xyz space coordinate to one side of the anilox roller 331, assuming that the mesh at the origin is the first one, i.e., i=1 and n i =n 1=0, the depth of the mesh 332 of the anilox roller 331 obtained by the above equation gradually becomes shallower from both sides to the middle, and the opening area of ​​the mesh 332 gradually becomes larger. With the design of this mesh 332, since the opening of a single mesh 332 gradually becomes smaller from the outside to the inside, when the anilox roller 331 without ink rotates and contacts the ink, the ink is more likely to flow into the mesh 332, which is beneficial for the anilox roller 331 without ink to absorb the ink, and the rotation speed of the anilox roller 331 can be appropriately increased, thereby improving the transfer efficiency of the anilox roller 331; in addition, when there is too much ink stored in the mesh 332, the fluidity of the surface ink is greater than the fluidity of the inner ink, and the excess ink is more likely to roll down along the arc surface under the action of its own gravity, so that the anilox roller 331 transfers the ink more evenly; since the greater the ink transfer pressure, the smaller the ink transfer amount, and vice versa, the greater the ink transfer amount, the ink transfer pressure is controlled to be 0.5-1MPa, and in order to effectively transfer the ink on the anilox roller 331, the designed The inking pressure is 3-5MPa. It is obvious that the deformation between the anilox roller 331 and the plate cylinder is large. The opening of the mesh 332 is designed to gradually decrease from the outside to the inside through the above equation, so the mesh 332 of the anilox roller on the side of the plate cylinder will increase, further improving the efficiency of the anilox roller 331 to transfer ink to the plate cylinder; the anilox roller 331 of the present invention adopts a modified carbon fiber roller core to replace the traditional steel roller, and a ceramic layer is coated on the surface, which is ground, polished and laser engraved; the mass of the modified carbon fiber roller core is only 1 / 12 of that of the steel roller. Since the weight of the roller body is greatly reduced, the friction of the roller is reduced, the deformation of the roller is reduced, the ink transfer uniformity is improved, and the service life is extended, which reduces the downtime of the printing press to a certain extent and improves the production efficiency; secondly, during the cleaning or replacement process, it is easier to operate, which reduces the workload of the operator and reduces the hazard index; finally, the modified carbon fiber roller core also exhibits extremely small offset performance. In actual tests, when a traditional steel anilox roller is used, its offset is 0.005-0.020mm, while the offset of the modified carbon fiber roller core is 0.0004-0.0017mm, which has excellent stability; in terms of the ink storage of the anilox roller mesh, the ink storage capacity of the anilox roller mesh with a quadrangular pyramid shape is 50-55% of the volume of the quadrangular pyramid and the ink storage capacity of the anilox roller mesh with a hemispherical mesh shape is 60-65% of the volume of the hemispherical mesh, while the ink storage capacity of the anilox roller mesh with the mesh shape designed by the present invention is 80-85% of the mesh volume, which has good ink storage performance.

[0059] This embodiment also provides a deviation calculation method for a printing device capable of intelligently correcting deviations, comprising the following steps:

[0060] Step 1, transferring the standard pixel photo of the secondary substrate after printing to the microprocessor 91 for storage;

[0061] Step 2, taking a picture using the CCD camera 101, and transmitting the picture to the microprocessor 91;

[0062] Step 3, the microprocessor 91 transmits the photographed image and the standard pixel photo to the data processing unit 92 for processing, and calculates the printing deviation d (d1, d2, d3, d4...) of each color;

[0063] Step 4: when the printing deviation of each color is 0, repeat steps 2 to 4; when the printing deviation of any color is not 0, redesign and control the roll-feeding device 2, the reel-winding device 4, the deviation-correcting device 1, the first tension-adjusting component 19, the second tension-adjusting component 20 and each printing component on the printing device 3 according to the requirements for tension and printing speed, and repeat steps 2 to 4;

[0064] Where di is the printing deviation of the i-th printed component, and i is a positive integer.

[0065] As a preferred implementation, in step 3, the standard pixel photo is first converted into the pixel coordinates a (a0, a1, a2, a3, a4...) of each color, and the photographed image is also converted into the pixel coordinates b (b0, b1, b2, b3, b4...) of each color, and then the distance deviation c=ba=(b0-a0, b1-a1, b2-a2, b3-a3, b4-a4...) between the two pixel coordinates is calculated, and the pixel deviation of each color is e=(b1-a1-b0+a0, b2-a2-b0+a0, b3-a3-b0+a0, b4-a4-b0+a0...), and then the pixel deviation of each color is converted into a printing deviation;

[0066] Where a0 is the coordinate set of the pattern of the secondary substrate in the standard pixel photo; ai is the coordinate set of the printed pattern of the i-th printed component in the standard pixel photo; b0 is the coordinate set of the pattern of the secondary substrate in the photographed image, and bi is the coordinate set of the printed pattern of the i-th printed component in the photographed image.

[0067] As a preferred implementation, the formula for converting the image into pixel coordinates in step 3 is as follows: in in is the coordinate set of the image, is a set of pixel coordinates;

[0068] The formula for converting the pixel deviation coordinates of each color into the printing deviation coordinates is as follows:

[0069] in in To print the deviation coordinate set, is the pixel deviation coordinate set, fx and fy are the horizontal and vertical size ratios between the image and the pixel coordinates, respectively, and (x0, y0) is the center coordinate of the image.

[0070] By using the deviation calculation method provided by the present invention, the printing deviation of each color can be calculated. When the printing deviation of any color is not 0, the tension and printing speed requirements can be redesigned according to the current error amount. The control system 9 regulates the movement and operation speed of each printing component on the feeding device 2, the winding device 4, the deviation correction device 1, the first tension adjustment component 19, the second tension adjustment component 20 and the printing device 3, so that the position of the overprint pattern and the color position on the secondary substrate can be adjusted in time and accurately, so that during the entire process of overprinting, the printing machine can be autonomously regulated, so that the deviation of the position of the overprint pattern and the color position on the secondary substrate can be maintained within a smaller error range, thereby improving the comprehensive performance of the overprinted product.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing device capable of intelligently correcting deviations, characterized in that: It includes a coiling device, a printing device, and a coiling device which are arranged in sequence, and also includes a deviation correction device for adjusting the relative position between the secondary printing material and the printing plate cylinder in the length direction; the deviation correction device is located at the feed inlet of the printing device; The correction device comprises a first correction roller and a second correction roller which are parallel and at different heights, and a first correction cylinder for driving the first correction roller to move up and down, wherein one end of the first correction roller is mounted on the movable end of the first correction cylinder; a first driving motor for driving the first correction roller to rotate is mounted on one end of the first correction roller, and a second driving motor for driving the second correction roller to rotate is mounted on one end of the second correction roller; The printing device comprises a central impression cylinder, an inter-color group dryer and at least two printing units, wherein the printing units are distributed around the central impression cylinder, the inter-color group dryer is arranged between two adjacent printing units, and the printing unit comprises an anilox roller for transferring ink, wherein the anilox roller is a curved surface, the mesh depth of the anilox roller gradually becomes shallower from both sides to the middle, the mesh opening area gradually becomes larger, and the opening of a single mesh gradually becomes smaller from the outside to the inside; It also includes a detection component for detecting the lengthwise position deviation between the secondary substrate and the plate cylinder; the detection component monitors the pattern position and color position on the secondary substrate, so that the control system can obtain information in a timely and accurate manner when an error occurs in the printing of the secondary substrate, and through the obtained information, regulate the speed of the winding device, the speed of the winding device, and the up and down movement and speed of the deviation correction device.

2. The printing device capable of intelligently correcting deviation according to claim 1, characterized in that: It also includes an installation frame, which includes a first installation column for installing the printing device, a second installation column for rolling and winding, and a horizontal installation beam erected on the top of the first installation column and the second installation column, the rolling device and the winding device are respectively located on both sides of the second installation column, and the correction device is installed on the horizontal installation beam.

3. The printing device capable of intelligently correcting deviation according to claim 2, characterized in that: A vertical slide groove is arranged on the horizontal mounting beam, and two ends of the first error correction roller are mounted on the vertical slide groove and can move along the length direction of the slide groove.

4. The printing device capable of intelligently correcting deviation according to claim 3, characterized in that: The deviation correction device also includes a first deviation correction auxiliary cylinder, the first deviation correction roller is installed at one end away from the first deviation correction cylinder at the movable end of the first deviation correction auxiliary cylinder, and the first deviation correction cylinder and the first deviation correction auxiliary cylinder are fixedly installed on the horizontal mounting beam.

5. The printing device capable of intelligently correcting deviation according to claim 2, characterized in that: The correction device includes a first main correction roller and one or more first auxiliary correction rollers, the first main correction roller and the first auxiliary correction roller are at the same height and are both installed on a first correction frame, the first correction cylinder is fixedly installed on the horizontal mounting beam, and the movable end of the first correction cylinder is fixedly installed on the first correction frame.

6. The printing device capable of intelligently correcting deviation according to claim 5, characterized in that: The first drive motor is fixedly mounted on one end of the first main correction roller, a first synchronous wheel is mounted on the rotating shaft of the first drive motor, a first transmission shaft is mounted on the first correction frame, a second synchronous wheel and one or more transmission wheels are mounted on the first transmission shaft, the first synchronous wheel and the second synchronous wheel are driven by a belt, a third synchronous wheel is mounted on one end of each of the first auxiliary correction rollers, and each of the transmission wheels is driven by a belt to one of the third synchronous wheels.

7. The printing device capable of intelligently correcting deviation according to claim 6, characterized in that: The first error correction frame is provided with a vertical sliding rod for guiding, and the horizontal mounting beam is provided with a vertical sliding groove corresponding to the vertical sliding rod.

8. A deviation calculation method for a printing device capable of intelligently correcting deviations according to any one of claims 1 to 7, characterized in that: The steps include: Step 1, transferring the standard pixel photo of the secondary substrate after printing to the microprocessor for storage; Step 2: Take a picture with a CCD camera and transmit the picture to a microprocessor; Step 3, the microprocessor transmits the photographed image and the standard pixel photo to the data processing unit for processing, and calculates the printing deviation of each color; Step 4. When the printing deviation of each color is 0, repeat steps 2 to 4. When the printing deviation of any color is not 0, redesign and control the feeding device, winding device, deviation correction device, first tension adjustment component, second tension adjustment component and each printing component on the printing device according to the requirements for tension and printing speed, and repeat steps 2 to 4.

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