Injection of Viscous Micro-Droplet via Nozzle-Driven Piezoelectric Micro-Jet and Its Performance Control Method

Abstract

The inkjet printing technology based on piezoelectric micro-jets can effectively realize the efficient and high-precision processing of special-shaped structures. In this work, a nozzle-driven piezoelectric micro-jet device is proposed, and its structure and micro-jet process are described. ANSYS two-phase, two-way fluid–structure coupling simulation analysis is carried out, and the mechanism of the piezoelectric micro-jet is described in detail. The effects of voltage amplitude, input signal frequency, nozzle diameter and oil viscosity on the injection performance of the proposed device are studied, and a set of effective control methods is summarized. The correctness of the piezoelectric micro-jet mechanism and the feasibility of the proposed nozzle-driven piezoelectric micro-jet device are proved by experiments, and an injection performance test is carried out. The experimental results are consistent with the ANSYS simulation results, which confirms the correctness of the experiment. Finally, the stability and superiority of the proposed device are verified via comparation experiments.

Design and Analysis Method of Piezoelectric Liquid Driving Device with Elastic External Displacement

“…The droplet velocity in DOD mode ranges from 0.08 to 1.8 m/s. Ti-Yuan Shan et al [25] proposed a piezoelectric microjet device, and studied the influence of the voltage and pulse frequency of the driving signal on the injection effect. Ning Liu et al [26] proposed a trapezoidal waveform design method for extruding piezoelectric inkjet printhead to provide improved stable injection and optimal droplet shape.…”