Printing developer concentration adjusting and control device

Abstract

The invention provides a printing developer concentration adjusting and control device which comprises a developer tank, electric conductivity measuring instrument and the signal input end of the developing liquid storage tank is connected, effective detection of developer concentration tank, ultraviolet absorption signal input end of the light detecting unit is respectively connected with the developer tank and conductivity measuring instrument, the through the analysis of developer concentration of effective constituents in the storage tank calibration conductivity meter, conductivity meter and ultraviolet absorption signal output end of the optical detection unit and a computer display and control unit is connected; servo pump is arranged between the developer tank and chemical and water supply unit, servo pump is connected with a relay, the computer display and control output signal unit to the relay, the relay to control the servo pump to the developing tank add water or thick developer, when required, the computer display and control unit sends a stop command, servo pump stop adding. So as to ensure the stability of developer concentration, achieve the purpose of automatic adjustment of developer concentration.

Description

technical field [0001] The invention relates to a solution concentration control device, in particular to a developer solution concentration control device for printing. Background technique [0002] The concentration stability of the developing solution is very important in the process of printing and flushing, because the developing solution is recycled during the flushing process. reduce. Therefore, how to keep the concentration of the developer stable is the basis for ensuring the normal progress of the flushing process. Because when the concentration of the developer is small, the printing and development are not sufficient, the density of the graphics and texts cannot meet the printing requirements, the dots of the graphics and texts with light tones are lost, and the dots of the graphics and texts with dark tones become smaller, which cannot meet the printing requirements. [0003] In the prior art, conductivity measurement is used to calculate developer concentrati...

AI Technical Summary

Problems solved by technology

However, in the actual process, since carbon dioxide in the air will gradually dissolve in the developer solution, the ion concentration measured by the conductivity method includes the carbonate concentration, and the actual concentration of the active developer solution is relatively low, which cannot be truly reflected in actual production. Century Concentration of Developer

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