System for achieving automatic pre-overprinting operation of rotary press by adopting digital control and laser positioning

Abstract

The invention discloses a system for achieving the automatic pre-overprinting operation of a rotary press by adopting digital control and laser positioning. The system is characterized in that laser line generators are mounted on laser line generator seats; when emitted, laser lines can be shone on and parallel to the center line positions of printing plate rollers; each printing color set is equipped with one laser line generator; through ball screw nuts, floating guide roller seats are driven to move up and down; according to the calculation of the system, it can be determined that floatingguide rollers are connected with the floating guide roller seats and capable of moving up and down along with the floating guide roller seats, thereby controlling the adjustment of the length of a printing material between two adjacent color sets; through the digital control, the length can be kept at an integral multiple of the perimeter of each printing plate roller; and as long as the error does not exceed a range from + / -2 mm to 9 mm, the rotary press can be started up and the automatic pre-overprinting operation can be enabled. The system disclosed by the invention has the characteristicsof saving labor, greatly reducing the waste of printing materials and ink before the printing operation with a new plate roller, achieving the digital control, facilitating the operation, and savingtime.

Description

technical field [0001] The invention relates to an automatic pre-registration system, in particular to an automatic pre-registration system for a rotary printing machine by adopting digital control laser positioning. Background technique [0002] The traditional pre-set is a manual clutch, so that the printing plate rollers are separated from other color groups. The printing plate rolls run behind and cannot advance. If you want to advance by 0.1 weeks, you must lag behind 1.1 weeks to synchronize. The registration mark line on the printing plate rolls must be visually inspected. What is the distance, and then pull the clutch by hand, you can’t stop the machine to measure, which has extremely high requirements for the printing machine operator; compared with the traditional pre-setting method: the current pre-setting system is completely installed when the new roller is installed, and the pre-setting is performed when the machine is stopped. It is all ready, and it can be fu...

AI Technical Summary

Problems solved by technology

[0002] The traditional pre-set is a manual clutch, so that the printing plate rollers are separated from other color groups. The printing plate rolls run behind and cannot advance. If you want to advance by 0.1 weeks, you must lag behind 1.1 weeks to synchronize. The registration mark line on the printing plate rolls must be visually inspected. What is the distance, and then pull the clutch by hand, you can’t stop the machine to measure, which has extremely high requirements for the printing machine operator; compared with the traditional pre-setting method: the current pre-setting system is completely installed when the new roller is installed, and the pre-setting is performed when the machine is stopped. Everything is ready, and it can be fully automatic overprinting directly after turning on the machine. Therefore, the traditional pre-setting is inefficient and does not meet the needs of people in modern society.

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