A printing process for multilayer composite printing

Abstract

The present application relates to the technical field of color printing, and particularly relates to a printing process for multi-layer composite printing. The printing machine is provided with auxiliary positioning to enter composite printing. The printing process comprises the following steps: S1: a positioning cursor pattern is designed in a non-printing area according to printing design of a printed matter, and generally, triangular cursors of different colors are printed in edge areas; S2: the positioning cursor pattern is printed while a bottom pattern of the printed matter is printed; S3: positioning devices are installed on different printing machines, and different programs are set; S4: the printed matter is subjected to multi-layer composite printing by the printing machines, and the printing machines comprise multiple sets of equipment, different printing machines correspond to different areas for printing, different equipment corresponds to different cursor areas, and only one set is shown in the figure; and S5: after printing, the positioning cursor pattern is cut according to production needs. The matching effect of the printing roller and the printed matter is improved, and the matching condition is detected at any time during the printing process.

Description

Technical Field

[0001] This invention relates to the technical field of color printing, and in particular to a multi-layer composite printing process. Background Technology

[0002] Printing is a technology that involves transferring ink from original manuscripts such as text, pictures, photographs, and anti-counterfeiting materials to the surface of materials such as paper, textiles, plastics, leather, PVC, and PC through processes such as plate making, inking, and pressing. It is a process of mass-producing and reproducing the content of the original manuscripts. Printing is the process of transferring approved printing plates to the substrate through printing machinery and special inks. Sometimes, multiple layers of paper need to be positioned and laminated before printing to meet the printing conditions.

[0003] For certain special printed materials, the printing areas on the printing roller are different, requiring the printed material to match the printing area of ​​the printing roller. During the printing roller curve printing process, it is also necessary to constantly detect whether there is any misalignment in the printing. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a multi-layer composite printing process that utilizes the pre-printing of positioning cursor patterns in the non-printing area of ​​the printed matter, and simultaneously adds auxiliary positioning wheels to the printing roller of the printing press to match the printing area.

[0005] The technical solution adopted by this invention to solve its technical problem is: a multi-layer composite printing process, comprising the following steps:

[0006] S1: Design a positioning cursor pattern in the non-printed area according to the printing design of the printed material;

[0007] S2: Print the positioning cursor pattern on the printed material at the same time as printing the bottom pattern.

[0008] S3: Install positioning devices on different printing presses and set different program settings;

[0009] S4: Printed materials are printed using a printing press with multiple layers of composite printing.

[0010] S5: After printing, cut off the positioning cursor pattern according to production needs.

[0011] The positioning device includes an auxiliary positioning wheel, a wheel detector, a paper detector, and a controller;

[0012] The auxiliary positioning wheel is installed coaxially with the printing roller and rotates synchronously with it. An auxiliary positioning label is affixed to the circumference of the auxiliary positioning wheel.

[0013] The wheel detector is installed next to the auxiliary positioning wheel, with the wheel detector facing the circumference of the auxiliary positioning wheel;

[0014] The paper detector is installed on the printing press in front of the printed material. The paper detector is equipped with a paper support, which consists of an L-shaped mounting bracket, a square adjusting shaft, and a probe fixing bracket. The square adjusting column is fixed to one end of the L-shaped mounting bracket and has a vertical elliptical adjusting hole. The adjusting hole has an adjusting bolt that can fix the probe fixing bracket. The paper detector is fixed on the probe fixing bracket.

[0015] The wheel detector and paper detector are connected to the controller, and the printing press is also connected to the controller.

[0016] A better solution is that the auxiliary positioning wheel is made of resin material.

[0017] In a more preferred embodiment, the wheel detector is equipped with a wheel bracket, which consists of a mounting shaft, a lateral adjustment block, a fixing block, a vertical adjustment block, a round rod, and a screw. One end of the mounting shaft is fixed to the frame, and the outer end of the mounting shaft has an axial groove. The lateral adjustment block is fitted onto the mounting shaft, and an adjusting bolt is provided corresponding to the groove on the mounting shaft. The fixing block and the round rod are fixed to the right side of the lateral adjustment block, and the vertical adjustment block is fitted onto the round rod. The right side of the vertical adjustment block has a threaded hole, and the corresponding fixing block has a round hole. The screw passes through the round hole and the threaded hole from bottom to top to adjust the distance between the vertical adjustment block and the fixing block. The side of the vertical adjustment block has a wheel detector hole.

[0018] A better approach is to pre-print the positioning cursor pattern in step S2, or to attach it separately to the printed material later.

[0019] A better solution is that the auxiliary positioning label is strip-shaped with black right-angled triangle patterns evenly distributed on it.

[0020] A better solution is that the positioning cursor pattern is a colored right-angled triangle pattern.

[0021] The beneficial effects of this invention are as follows: By utilizing the blank areas of the non-printed areas of the printed material, auxiliary positioning cursor patterns are printed, adding a positioning area to the printed material. This is combined with the auxiliary positioning wheel on the printing roller of the printing press, which has an auxiliary positioning circumferential cursor on its circumferential surface. This improves the matching efficiency between the printing roller pattern and the printed material pattern in the early stages of printing. In the later stages of printing, the roller detector and paper detector feed back signals to the controller for data matching, ensuring the matching between the printing roller and the printed material during the printing process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the printing press structure for installing the positioning device of the present invention.

[0023] Figure 2 yes Figure 1 Partial schematic diagram A.

[0024] Figure 3 yes Figure 1 Partial schematic diagram B.

[0025] In the diagram: 1. Auxiliary positioning wheel; 2. Wheel detector; 21. Mounting shaft; 22. Lateral adjustment block; 23. Fixing block; 24. Vertical adjustment block; 25. Round rod; 26. Screw; 3. Paper detector; 31. L-shaped mounting bracket; 32. Square adjustment shaft; 33. Probe fixing bracket; 34. Oval adjustment hole; 4. Printing roller; 5. Auxiliary positioning label; 6. Printing machine; 7. Adjusting bolt; 8. Printed material; 9. Fixing bolt. Detailed Implementation

[0026] Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the accompanying drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention. Example

[0027] A multi-layer composite printing process includes the following steps:

[0028] S1: Design a positioning cursor pattern in the non-printed area according to the printing design of the printed material. Generally, triangular cursors of different colors are printed in the edge area; the positioning cursor pattern is a colored right-angled triangle pattern (not shown in the figure).

[0029] S2: Print the positioning cursor pattern on the printed material at the same time as printing the bottom pattern.

[0030] S3: Install positioning devices on different printing presses and set different program settings;

[0031] S4: Printed materials are printed using a printing press with multiple layers of composite printing. The printing press consists of multiple sets of equipment. Different printing press equipment corresponds to different areas of printing, and different equipment corresponds to different cursor areas. Only one set is shown in the figure.

[0032] S5: After printing, cut off the positioning cursor pattern according to production needs.

[0033] like Figure 1 , 2 As shown in Figure 3, the positioning device includes an auxiliary positioning wheel 1, a wheel detector 2, a paper detector 3, and a controller.

[0034] The auxiliary positioning wheel 1 is coaxially mounted with the printing roller 4 and rotates synchronously with it. A circular auxiliary positioning label 5 is affixed to the circumference of the auxiliary positioning wheel 1. The auxiliary positioning wheel 1 is made of resin material. Installing the auxiliary positioning wheel on the printing roller facilitates disassembly and subsequent maintenance; an extension is sufficient. The resin material of the auxiliary positioning wheel places a negligible burden on the printing roller, reducing costs. Different auxiliary positioning wheels with different labels can be made for different printing rollers, allowing for direct replacement of the auxiliary positioning wheel. The auxiliary positioning wheel has markings corresponding to the printing roller. The auxiliary positioning label is strip-shaped with evenly distributed black right-angled triangle patterns (not shown in the figure) affixed to the circumference of the auxiliary positioning wheel.

[0035] The wheel detector 2 is installed next to the auxiliary positioning wheel 1, facing the circumference of the auxiliary positioning wheel 1. The wheel detector 2 is equipped with a wheel bracket, which consists of a mounting shaft 21, a horizontal adjustment block 22, a fixing block 23, a vertical adjustment block 24, a round rod 25, and a screw 26. One end of the mounting shaft 21 is fixed to the printing machine 6, and the outer end of the mounting shaft 21 has a groove 27 along the axial direction. The horizontal adjustment block 22 is fitted onto the mounting shaft 21, and an adjusting bolt 7 is provided corresponding to the groove of the mounting shaft 21. The fixing block 23 and the round rod 25 are fixed to the right side of the horizontal adjustment block 22. The vertical adjustment block 24 is fitted onto the round rod 25, and a threaded hole is provided on the right side of the vertical adjustment block 24. A round hole is provided on the corresponding fixing block. The screw 26 passes through the round hole and the threaded hole from bottom to top to adjust the distance between the vertical adjustment block and the fixing block. The side of the vertical adjustment block has a wheel detector hole.

[0036] The distance between the wheel detector and the printing press is adjusted by adjusting the horizontal adjustment block to ensure that the wheel detector and the auxiliary positioning wheel are coplanar. The height of the wheel detector is adjusted by adjusting the screw, and the direction is adjusted by adjusting the mounting shaft. Finally, the wheel detector is ensured to be perpendicular to the circumference of the auxiliary positioning wheel to obtain accurate acquisition signals.

[0037] The paper detector 3 is installed on the printing press 6 directly opposite the printed material. The paper detector 3 is equipped with a paper support, which consists of an L-shaped mounting bracket 31, a square adjusting shaft 32, and a probe fixing bracket 33. The square adjusting shaft 32 is fixed to one end of the L-shaped mounting bracket 31 and has a vertical elliptical adjusting hole 34. The adjusting hole 34 has an adjusting bolt 7 that can fix the probe fixing bracket 33. The paper detector 3 is fixed to the probe fixing bracket 33 by fixing bolts 9. The mounting bracket allows the paper detector to obtain positioning marks at different positions on the printed material as needed. The probe fixing bracket adjusts the mounting hole of the paper detector on the probe fixing bracket by adjusting bolts to ensure that the paper detector is perpendicular to the printed material and can correctly read the positioning mark signal.

[0038] Wheel detector 2 and paper detector 3 are connected to the controller, and the printing press is also connected to the controller.

[0039] The working process of this invention is as follows: a portion of the edge area of ​​the printed material is left out for printing different color marks, or auxiliary markings are affixed to the blank area at the edge according to the needs of later printing of the printed material, so that the printing machine can obtain the printing area.

[0040] By adding auxiliary positioning wheels to the existing printing press, the printing press can be composed of multiple printing units. Each printing press can print different areas or use different colors. The auxiliary positioning wheels of different printing presses can be fitted with different auxiliary positioning labels, or the same auxiliary positioning label can be fitted with different sizes for identification.

[0041] For clarity, not all features of the actual embodiments will be described. In the following description, well-known functions and structures will not be described in detail, as they would confuse the invention with unnecessary details. It should be understood that in the development of any actual embodiment, a great deal of implementation detail must be made to achieve the developer’s specific goals, such as changing one embodiment to another according to the limitations of the system or business. In addition, it should be understood that such development work may be complex and time-consuming, but is merely routine work for those skilled in the art.

Claims

1. A printing process of multi-layer composite printing, comprising the following steps: S1: designing a positioning cursor pattern in non-printing area according to the printing design of the printed matter; S2: printing the positioning cursor pattern while printing the bottom pattern of the printed matter; S3: installing positioning devices on different printing machines and setting different programs; S4: printing the printed matter by the printing machine for multi-layer composite printing; S5: cutting off the positioning cursor pattern according to the production needs after printing is stopped; The positioning device comprises an auxiliary positioning wheel, a wheel detector, a paper detector and a controller. The auxiliary positioning wheel is coaxially installed with the printing roller and rotates synchronously with the printing roller, and an auxiliary positioning label is attached to the circumferential surface of the auxiliary positioning wheel. The wheel detector is installed beside the auxiliary positioning wheel and faces the circumferential surface of the auxiliary positioning wheel, and the wheel detector is provided with a wheel support which is composed of a mounting shaft, a horizontal adjusting block, a fixed block, a vertical adjusting block, a round rod and a screw rod. The mounting shaft is fixed at one end to the rack, and a groove is provided at the outer side of the other end of the mounting shaft along the axial direction. The horizontal adjusting block is sleeved on the mounting shaft and is provided with an adjusting bolt corresponding to the groove of the mounting shaft.

2. A printing process for multilayer composite printing as claimed in claim 1, wherein: The fixed block and the round rod are fixed at the right side of the horizontal adjusting block.

3. The printing process for multilayer composite printing as claimed in claim 1 wherein: The vertical adjusting block is sleeved on the round rod and is provided with a threaded hole at the right side.

4. A printing process for multilayer composite printing as claimed in any one of claims 1 to 3, characterized in that: A round hole is provided on the fixed block corresponding to the threaded hole, and the screw rod passes through the round hole and the threaded hole from bottom to top to adjust the distance between the vertical adjusting block and the fixed block.

5. A printing process for multilayer composite printing as claimed in any one of claims 1 to 3, characterized in that: The vertical adjusting block is provided with a wheel detector hole at the side. The paper detector is installed at a position of the printing machine facing the printed matter and is provided with a paper support which is composed of an L-shaped mounting bracket, a square adjusting shaft and a probe fixing bracket. The square adjusting shaft is fixed at one end of the L-shaped mounting bracket and is provided with a vertical oval adjusting hole. An adjusting bolt is provided in the adjusting hole to fix the probe fixing bracket. The paper detector is fixed on the probe fixing bracket. The wheel detector and the paper detector are connected to the controller, and the printing machine is also connected to the controller. The auxiliary positioning wheel is made of resin material. The positioning cursor pattern is pre-printed or separately pasted to the printed matter in step S2. The auxiliary positioning label is in strip shape and uniformly distributed with black right-angled triangle patterns. The positioning cursor pattern is a colored right-angled triangle pattern.

Images