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Reel material printer pre-positioning automatic overprinting system and automatic overprinting method

A printing machine and pre-positioning technology, applied in printing machines, general parts of printing machinery, printing, etc., can solve the problem that the photoelectric sensor cannot detect the overprinting standard line of the same color or similar color, cannot print the overprinting standard line, and cannot use it. Problems such as automatic overprinting system, to achieve the effect of simplifying the interference of unpredictable factors and simple and reliable control system

Inactive Publication Date: 2015-01-07
任继平 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem is: the change of the length of the material between the printing units, the stretching of the printing tension between the printing units, the jumping of the feeding roller and the change of the material distance between the units caused by the overall out-of-roundness of the feeding roller, etc.
[0005] 1. Some printed matter surfaces (non-continuous patterns) cannot print overprint standard lines because printing overprint standard lines will affect the appearance quality of the final product, so there is no way to use the above automatic overprint system
[0006] 2. For printed materials with full background color, because the photoelectric sensor cannot detect the overprint standard line of the same color or similar colors, there is no way to use the above automatic overprinting system

Method used

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  • Reel material printer pre-positioning automatic overprinting system and automatic overprinting method
  • Reel material printer pre-positioning automatic overprinting system and automatic overprinting method
  • Reel material printer pre-positioning automatic overprinting system and automatic overprinting method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: with reference to attached Figure 1-4 . A pre-positioning automatic overprinting system for a web printing machine, comprising a control system 17, a first printing unit to an Nth printing unit, an overprinting motor 6 is provided between the first printing unit and the Nth printing unit, and the overprinting motor 6 and The overprint screw 4 is connected to and drives the overprint screw 4 to rotate, and the overprint adjustment roller 5 is driven by the overprint screw 4 to move up and down to adjust the overprint error between the nth color and the first color. There is a photoelectric sensor A7, and the signal output end of the photoelectric sensor A7 is connected to the signal end of the controller 17 through a connecting line; the first signal rod 11 and the second signal rod 12 are installed at the distance between the end faces of the printing plate transmission gear 16 in the Nth printing unit, A rotary encoder 15 is installed in the center of t...

Embodiment 2

[0024] Embodiment 2: On the basis of Embodiment 1, a pre-positioning automatic overprinting method of a web printing machine, using the overprint adjustment roller set by the control system of the printing press at low speed to manually adjust and adjust manually (strobe can be used) instrument, still image system, etc.) overprint adjustment, when the overprint error reaches zero visually, the photoelectric sensor recorded by the rotary encoder at this time detects the signal position of the standard color mark line, the signal position of the second signal rod, and the virtual registration of the printing plate cylinder The center position is identified as the exact position where the overprint error is zero, and the control system records its position; if the overprint exact position drifts, or a more precise overprint exact position is required, the virtual center pulse position ( At the same time, select the standard color line signal between the areas with less pulse signa...

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PUM

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Abstract

The invention relates to a reel material printer pre-positioning automatic overprinting system of various color overprinting in printing machinery and an automatic overprinting method. The system comprises an overprint color mark line of a first color a photoelectric sensor, a plate cylinder, two position signal rods and a photoelectric sensor, a rotary encoder synchronized with the gear of the plate cylinder, an overprint motor, an overprint screw rod, a control system and other mechanisms, the error of overprinting of a subsequent printing color and the first color is regulated to be zero by means of observation of vision (or stroboscope, still picture system and the like), and the condition is confirmed that: the photoelectric sensor measures that the position of a signal of the overprint color mark line of the first color and the plate cylinder virtual reference register central position are positions with zero overprint error. In each subsequent time of printing, the system is controlled to instruct the overprint motor to drive an overprint screw shaft and an overprint regulating shaft to perform error regulation according changes of the position of the signal of the overprint color mark line of the first color and the plate cylinder virtual register central position of the nth color detected by the photoelectric sensor.

Description

technical field [0001] The invention relates to a pre-positioning automatic overprinting system and an automatic overprinting method of a web printing machine for multi-color overprinting in a printing machine, belonging to the field of printing unit manufacturing. Background technique [0002] The overprint mechanism of the traditional web printing machine mainly includes web offset printing machine, web gravure printing machine, web flexo printing machine, fabric gravure direct printing machine, fabric flexographic direct printing machine, etc. The web offset printing machine does not need an automatic overprinting system because the dimensional change is extremely small during the paper printing process, and the accuracy of the equipment manufacturing ensures the overprinting accuracy, while the web gravure printing machine, the web flexo printing machine, and the web fabric gravure printing There are two main types of automatic overprinting systems used in printing machi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/00B41F33/16
Inventor 任继平白广志沈中增任述刚
Owner 任继平
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