Overprinting method, device, system and computer-readable medium of unit-type flexo printing machine

Abstract

The invention provides an overprinting method, device, system and computer-readable medium of a unit-type flexo printing machine. The overprinting method of a unit-type flexo printing machine includes: using at least two printing units included in a unit-type flexo printing machine to sequentially print on printing materials Print wedge-shaped color scales of different colors, wherein the width of the color scale image between the rising edge and the falling edge of the wedge-shaped color scale in the first direction changes monotonously along the second direction; respectively detect the color of each wedge-shaped color scale and the rising Edge position and falling edge position; according to the rising edge position and falling edge position of each wedge-shaped color mark, respectively determine the longitudinal deviation and lateral deviation of each wedge-shaped color mark; for each wedge-shaped color mark, determine the color of the wedge-shaped color mark according to the color The target printing unit, and adjust the position of the printing plate roller of the printing unit printing the wedge-shaped color mark in the first and second directions according to the longitudinal deviation and lateral deviation of the wedge-shaped color mark. The solution can improve the quality of printed products.

Description

technical field [0001] The invention relates to the field of printing technology, in particular to an overprinting method, device, system and computer-readable medium of a group type flexo printing machine. Background technique [0002] Unit flexo printing machine is a printing equipment commonly used in label and flexible packaging printing. The unit type flexo printing machine includes multiple printing units, and each printing unit can sequentially print patterns of different colors on the printing material to achieve overprinting, thereby forming the required multi-color pattern on the printing material. In the process of overprinting, it is necessary to adjust the position of the printing plate roller in each printing unit to ensure that each printing unit can overlap and register the graphic printing. [0003] At present, when using a unit-type flexo printing machine for overprinting, automatic overprinting is usually achieved by following the standard overprinting me...

AI Technical Summary

Problems solved by technology

[0004] In view of the current method of realizing overprinting of unit-type flexo printing machines by following the standard overprinting method, only the position deviation of the printing plate rollers in each printing unit in the paper-feeding direction can be detected according to the single-color square mark, and the position deviation of each printing plate roller cannot be detected. Deviation perpendicular to paper feeding direction

Therefore, the existing standard overprinting method can only realize automatic overprinting in the longitudinal direction (direction of paper feeding), but cannot realize automatic overprinting in the horizontal direction (direction perpendicular to the direction of paper feeding), resulting in poor quality of printed products

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