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Ink adjustment scheme for printing presses with short inking units

A technology of printing presses and regulators, which is applied to the general parts of printing machinery, printing machines, rotary printing machines, etc., can solve the problems of reducing printing speed, unfavorable rapid production, and changing production speed of printing machines, etc., to achieve adjustment and adjustment loops Improved effect

Active Publication Date: 2019-01-08
海德堡印刷机械知识产权股份两合公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the disadvantage of the short inking unit is that there are no ink metering elements for metering the ink in the inking unit of the printing unit and therefore any color differences that occur between the printed original and the produced printing material have to be corrected by other means
But the change of printing speed has the disadvantage that the production speed of the printing press changes
Therefore, especially permanently reduced printing speeds are detrimental to fast production

Method used

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  • Ink adjustment scheme for printing presses with short inking units
  • Ink adjustment scheme for printing presses with short inking units
  • Ink adjustment scheme for printing presses with short inking units

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Embodiment Construction

[0026] existfigure 1 The structure of the regulation circuit for the ink regulation of an offset printing press with a short inking unit is shown in . Here, the actual coloring (or inking) is measured with the aid of a color meter The actual coloring is superimposed by the control means. measured actual coloration is analyzed in the control computer of the printing press and compared with the rated coloring F λ,soll Compared. exist figure 1 Medium, color density F soll The rated value of 200 is predetermined. If the analysis process indicates that the color actual value F * With a value of 220, the color measuring device determines a 10% higher color density on the tested printing material. This difference must now be adjusted via a regulator. Furthermore, the controller has the printing speed v of the printing press as an input variable, wherein the controller calculates and predetermines a temperature T superimposed by a control device using the set printing speed ...

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Abstract

The invention relates to an ink controlling scheme for printing presses having short inking units, and in particular relates to a method for controlling coloration in printing presses, depending on printing speed (v) and temperature (T), to achieve a desired rated color (F[lambda], soll), wherein the printing press comprises a control computer controlling the printing speed (v) and / or temperature (T) of the printing press. The invention is characterized in that the control computer controls the temperature (T) or printing speed (v) prior to or during the continuous printing operation by adaptive control.

Description

technical field [0001] The present invention relates to a method for controlling color matching as a function of printing speed and temperature to achieve a desired nominal coloration in a printing press having a control computer which controls the printing speed and / or the printing press or temperature. Background technique [0002] Such a method for controlling color matching in printing presses is known from DE 10 2010 046 957 A1. This document describes a method for adjusting the color difference between the target color value and the actual color value in a printing press with at least one inking unit and a control computer, wherein when a difference between the target color value and the actual color value is detected When there is a color difference between them, in order to adjust and eliminate the color difference, the combined control process consisting of the change of printing speed and the temperature change in the ink delivery device is carried out through the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/10B41F31/00
CPCB41F33/10B41F13/22B41F31/002B41F33/0045
Inventor N·普法伊费尔E·伦兹
Owner 海德堡印刷机械知识产权股份两合公司
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