INKJET HEAD ASSEMBLY AND VISCOSITY CONTROL METHOD THEREOF

摘要

PURPOSE: An ink-jet head assembly and a viscosity controlling method which is used for the same are provided to discharge ink in a desired viscosity by measuring the viscosity of ink before flowing in an ink-jet head. CONSTITUTION: An ink-jet head assembly comprises an ink-jet head(20), an ink cartridge(12), and a matter property measuring device(40). The ink-jet head includes a nozzle discharging ink. The ink cartridge is combined with an ink jet head and to supplies ink to the ink jet head. An intermediate ink chamber for supplying ink to the ink jet head is formed in the ink cartridge. The matter property measuring device measures the property of the ink flowing to the ink-jet head from the intermediate ink chamber. The matter property measuring device comprises a planar rotary type viscometer for measuring the viscosity of the ink. A conical shape rotating rotor of the planar rotary type viscometer is installed in the ink jet head.