KGK CCS3000L, Инструкция по эксплуатации, Страница: 48 / 62

48
Ink and solvent
3
Viscosity measurement
Ink and solvent are blended in the equipment so that the viscosity is suitable for printing. A Zahn cup is used
to measure the viscosity.

Principles
With a Zahn cup, ink is supplied to the top of a cylindrical reservoir, and the time taken for ink to drop from
a tiny hole at the bottom is measured to determine the viscosity.

Operation
Status Process
Normal operation A circulating pump circulates and agitates ink.
Injection to the Zahn cup
After a lapse of a certain time from the end of the previous measurement, ink is
supplied from the main reservoir to the Zahn cup.
The amount of liquid reaches the upper sensor. (After that, the supply continues for
a predetermined time.)
Start of measurement of
the time taken to drop
The supply of ink to the Zahn cup is stopped. Ink drops from the narrow tube at the bottom to
the main reservoir, and the amount of liquid in the Zahn cup starts to decrease.
When the upper sensor switches from OFF to ON, measurement starts.
End of measurement of
the time taken to drop
When the amount of liquid reaches the lower sensor, the time elapsed from the start
of measurement is measured, and normal operation starts again.
This measured time is used as the viscosity of ink for viscosity control.
Ink supply
Narrow
Main reservoir
Upper sensor
Lower sensor