High-frequency jetting through axial forced vibration of jet tube

On-demand droplet jetting can be achieved through the axial reciprocating motion of the jet tube, which is a novel technology. However, its feasibility for high-frequency jetting has not been explored. In this study, it is found that when high-frequency driving signals are applied to the piezoelectric ceramic, the tube undergoes forced vibration, which enables repeatable jetting at frequencies of up to 10 kHz. This paper also investigates the effects of the vibration amplitude and frequency of the tube on the jetting behavior and reveals a linear relationship between the jet velocity and the tube vibration velocity amplitude.