Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Droplet Formation of a Piezoelectric Inkjet Nozzle According to the Variation of Pulse Widths in Bipolar Waveform

양극파형의 펄스폭 변화에 따른 피에조 구동형 잉크젯 노즐의 액적 토출 특성

  • 최성훈 (서울과학기술대학교 에너지 환경대학원) ;
  • 성재용 (서울과학기술대학교 기계공학과) ;
  • 이명호 (서울과학기술대학교 기계공학과)
  • Received : 2011.12.20
  • Accepted : 2011.12.28
  • Published : 2012.04.30
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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

References

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