Abstract
In order to prevent the deflecting jet, a hypothetical model of local micro impurity is proposed to investigate the transformation of capillary jet on the deflection angle, jet direction, and local pressure. The changes are revealed as the local impurity lies at the different places of inner orifice wall. The simulation results agree with the experiments that the capillary jet deflects as the impurity lies in the orifice of capillary nozzle, which proves that the hypothetical model of local micro impurity is reasonable. Cleaning measures are taken to eliminate the jet deflection. This work is useful to improve the direction accuracy and the stability of capillary jet for the subsequent inkjet process in complex curved surface printing.
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