Registration system and printing equipment

Abstract

The invention provides a registration system which is suitable for registration control of a plurality of color cells. Each color cell is provided with a registration module, and each registration module can independently determine an image acquisition opportunity in combination with deformation of a printing material, so that an accumulative error of a photographing opportunity is eliminated, and it is ensured that a correct target is acquired under the condition of a small field of view; each registration module is only used for detecting a registration deviation value of the corresponding color cell relative to a reference color cell, so that registration adjustment of each color cell is independent, the situation that subsequent color cell parameters are adjusted along with adjustment of parameters of one or more color cells is avoided, and the registration system is high in detection precision of the registration deviation value of each color cell, and high in response speed; and each registration module in the registration system is provided with an embedded processor, and a unified industrial personal computer is not arranged, so that the processing speed is increased, the communication delay is reduced, the registration precision of printed matters is high, and the registration system is suitable for various printing scenes such as flexographic printing, gravure printing and digital printing.

Description

Technical field [0001] The present application belongs to the field of printing equipment, and more particularly to a registration system and a printing equipment. Background technique [0002] On the multi-color group printing device, the color complex pattern typically passes through a plurality of color groups in the same position, in the test stage, ensuring that the multi-color group is accurately stacked in the same position is referred to as a registration. Existing multi-color group printing equipment, including multiple color groups of different colors, and a registration module, each colors use the same target to achieve registration measurement and control, if you adjust some of the color groups Trigger time or distance and other parameters, the corresponding parameters of all colors need to be adjusted. [0003] The registration scheme includes three types of manual classes, photoelectric registration and visual registration. Artificial programs are the target operato...

AI Technical Summary

Problems solved by technology

[0004] Fine prints with high-quality requirements usually require higher registration accuracy, and the existing registration solutions are difficult to meet such high-quality printing requirements

Specifically, in the manual registration scheme, the operator manually adjusts the phase deviation of each color group according to the width of the cross strokes. This registration method is completely based on the human eye. Not only the adjustment time is long, the efficiency is low, and the material waste in the adjustment stage is serious. Final adjustment accuracy cannot be guaranteed

The photoelectric registration solution is limited by the low precision of the color mark sensor itself, and the photoelectric registration solution cannot meet the high-precision requirements of high-end printed products, especially when printing materials with a large stretch coefficient, the error range is large, and it cannot be guaranteed Registration accuracy

The visual solution is limited by the fact that the imaging surface of the image acquisition device needs to be flat, but the position of the printing point is an arc surface, so the image acquisition device needs to be set at the downstream position of the printing point, that is, there is a distance between the installation position of the image acquisition device and the printing point. A certain distance, which will lead to the lag of the register offset value data, especially during the acceleration and deceleration process of the printing machine, the printing tension is easy to change, resulting in deformation of the printing substrate, which in turn makes it impossible to maintain the registration accuracy

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