Printing ink viscosity on-line measuring device and method

Abstract

The invention discloses a printing ink viscosity on-line measuring device which comprises a printing ink conveying main pipeline, and further comprises a measuring branch branched from the printing ink conveying main pipeline, a viscosity measuring pipe which is vertically arranged and the bottom of which is communicated with the measuring branch, a heat exchange device which is arranged outside the viscosity measuring pipe, and an upper computer. A valve is arranged on the measuring branch, and a measuring ball is arranged in the viscosity measuring pipe; the top of the viscosity measuring pipe is connected back to the printing ink conveying main pipeline through a pipeline, the upper side and the lower side of the outer side of the viscosity measuring pipe are each provided with a ball sensor, the upper computer is connected with the ball sensors, and the viscosity measuring value is calculated by obtaining the sensing time difference of the two ball sensors. The invention also discloses a viscosity online measurement method. On-line measurement of the ink viscosity is realized based on the falling ball method.

Description

technical field [0001] The invention belongs to printing machines, and in particular relates to an online ink viscosity measuring device and method. Background technique [0002] Ink is a raw material that must be used in the printing field. Since the ink contains volatile components, the viscosity of the ink will change with the volatilization of the volatile components, and the change of ink temperature will also cause the change of viscosity; and the change of ink viscosity will Cause color difference and affect printing quality; therefore, the measurement and control of ink viscosity is very important. [0003] The traditional ink viscosity measurement method is manual measurement using a viscosity cup and a stopwatch, but the deviation is relatively large, and the measurement is generally performed every 30-60 minutes, resulting in large fluctuations in printing quality. Therefore, it is necessary to find a method for accurate measurement of ink viscosity at high frequ...

AI Technical Summary

Problems solved by technology

[0016] 2. The time when the ball passes through the two marks should be measured automatically and accurately;

[0021] 5. In the ink circulation, affected by the delivery pump, the ink will contain certain air bubbles, and the air bubbles are in an unstable state of flow, resulting in inaccurate measurement results;

[0022] There are no relevant patents and public literature reports for the above questions 4 and 5

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