An automatic trapping compensation method, system and device for a flexographic printing press

By combining visual detection and motion controllers, the positional deviation of the printing unit is acquired and processed in real time, generating printing roller phase adjustment commands. This solves the problems of registration control adaptability and dynamic disturbance in flexographic printing presses, and achieves high-precision registration correction.

CN122275440APending Publication Date: 2026-06-26SENS MECHANICAL & ELECTRICAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SENS MECHANICAL & ELECTRICAL CO LTD
Filing Date
2026-04-14
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Traditional flexographic printing presses have poor adaptability in their registration control methods, lack self-adjustment capabilities, and cannot respond to dynamic disturbances in real time, leading to print quality problems.

Method used

A vision inspection system is used to acquire the position deviation value of the printing unit in real time. The motion controller performs validity verification, filtering and nonlinear gain adjustment to generate the plate roller phase adjustment command and realize registration correction.

Benefits of technology

It improves the registration accuracy and adaptability, and can maintain extremely high printing quality during high-speed and variable-speed processes, solving the problems of poor adaptability and dynamic disturbance of traditional methods.

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Abstract

This application relates to the field of automated control technology for printing machinery, and particularly to an automatic registration compensation method, system, and device for a flexographic printing press. The method includes: a deviation acquisition step: during the printing process, the real-time positional deviation value of the color mark printed by the subsequent printing unit relative to a reference mark is acquired in real time through the vision detection system, the reference mark being the mark printed on the substrate by the first printing unit; an adjustment step: the real-time positional deviation value is processed by the motion controller, including validity verification, filtering, and nonlinear gain adjustment, to generate a corresponding plate roller phase adjustment command; and a correction step: the plate roller phase adjustment command is applied to the plate roller of the corresponding printing unit through a superimposed positioning method to correct the phase of the plate roller relative to the spindle, thereby achieving registration correction. This application can effectively correct the phase of the plate roller relative to the spindle, achieving registration correction and improving printing quality.
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