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Method of using camera to carry out controlling automatic alignment for printing machine

An automatic registration and camera technology, which is applied to the general parts of printing machinery, printing machines, printing, etc., can solve the problems of high scrap rate and poor control of printed matter printing quality, achieve low paper loss, save raw materials, and register high precision effect

Active Publication Date: 2007-07-25
CHANGCHUN JIHAI OBSERVATION & CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for automatic registration control of printing machines by using a camera to solve the problems that the printing quality of printed matter is not well controlled and the reject rate is high when manual visual inspection is used at present.

Method used

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  • Method of using camera to carry out controlling automatic alignment for printing machine
  • Method of using camera to carry out controlling automatic alignment for printing machine
  • Method of using camera to carry out controlling automatic alignment for printing machine

Examples

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Embodiment Construction

[0037] Include the following steps:

[0038] 1. When making a plate, a color mark group specially used to detect color registration errors is printed on the outside of each color printing pattern at the same time;

[0039] As shown in accompanying drawings 2 and 3, the color code group is composed of a group of rhombus-shaped color marks, the color code can be arranged at any position on the printing plate, and other patterns can appear around the color code group;

[0040] The side length a of the color code is 0.3-3 mm, and the distance m between the color code and the center of the color code is 3-15 mm. The color codes can be arranged in the circumferential direction of the printing plate, or in the axial direction of the printing plate; The number of color marks is N+1, where N is the number of printing colors, such as four-color printing, the printed color mark group includes 5 color marks.

[0041] The color scales at the front and the back of the color scale group are...

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Abstract

A method for controlling the automatic chromaticity of printing machine by use of camera includes such steps as light printing a marker for detecting the chromaticity error, using a camera to take the digital image of the marker area, transmitting the digital image, detecting the chromaticity error, outputting chromaticity control signal, and fast regulating the position of printing drum.

Description

technical field [0001] The invention relates to a method for automatic registration control of a printing machine. Background technique [0002] The existing printing machine is color-separated printing, that is, one printing station only prints one color. When the printing material passes through each printing unit in turn, it is printed with patterns of various colors. When the last color is printed, a complete color is formed. colorful pattern. However, during the printing process, due to changes in system tension, temperature, physical properties of the printing material and other factors, the actual printing position will deviate from the original printing position and cause errors. This error is called registration error. [0003] Due to the existence of color registration errors, high-speed printing machines will produce a large number of waste products during the process of starting up, changing rolls and washing plates. At present, the common operation method is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/00B41F33/16G01J3/46G06K9/00G06K9/20G06K9/36
Inventor 黎妹红王强
Owner CHANGCHUN JIHAI OBSERVATION & CONTROL TECH
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