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http://dx.doi.org/10.5407/JKSV.2011.10.1.009

Droplet Formation of a Piezoelectric Inkjet Nozzle According to the Variation of Pulse Widths in Bipolar Waveform  

Choi, Sung-Hoon (서울과학기술대학교 에너지 환경대학원)
Sung, Jae-Yong (서울과학기술대학교 기계공학과)
Lee, Myeong-Ho (서울과학기술대학교 기계공학과)
Publication Information
Journal of the Korean Society of Visualization / v.10, no.1, 2012 , pp. 9-14 More about this Journal
Abstract
In this study, a piezoelectric inkjet nozzle with a rectangular shaped channel has been developed, and the characteristics of droplet formation have been investigated according to the variation of pulse widths in bipolar waveform. The channel of the nozzle was fabricated transparently by a precision machining technique. A tantalum membrane which was attached to a piezoelectric material covers the channel. By applying two types of bipolar waveforms to the piezoelectric actuators, droplet formation through the nozzle was monitored by a CCD camera. For the variety of the first and second pulse widths in the bipolar waveforms, the regimes of single and double droplet formations are presented. The change of droplet velocity which depends on the pulse width and the type of waveform is also discussed.
Keywords
Piezoelectric Actuation; Inkjet Nozzle; Bipolar Waveform; Droplet Formation; Droplet Velocity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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