Pole-type ground electrode in nozzle for electrostatic field induced drop-on-demand inkjet head

被引：51

作者：

Lee, Sukhan ^{[2
]}

Byun, Doyoung ^{[1
]}

Jun, Daewon ^{[2
]}

Choi, Jaeyong ^{[2
]}

Kim, Yongjae ^{[3
]}

Yang, Ji Hye ^{[1
]}

Son, Sang Uk ^{[2
]}

Tran, Si Bui Quang ^{[1
]}

Ko, Han Seo ^{[3
]}

机构：

[1] Konkuk Univ, Dept Aerosp Informat Engn, Inst Intelligent Vehicle & Syst Technol, Seoul 143701, South Korea

[2] Sungkyunkwan Univ, Sch Informat & Commun Engn, Suwon 440746, Kyunggi Do, South Korea

[3] Sungkyunkwan Univ, Sch Mech Engn, Suwon 440746, Kyunggi Do, South Korea

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2008年 / 141卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

electrostatic field induced inkjet; drop-on-demand; droplet ejection; pole-type ground electrode; ink physical property;

D O I：

10.1016/j.sna.2007.08.019

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a novel mechanism for an electrostatic field induced drop-on-demand ink-jetting device that features a nozzle with a conductive pole located inside the nozzle, referred to here as a pole-type nozzle. The effects of the pole-type nozzle on the efficiency of the jetting are numerically and experimentally investigated. The electric voltage signal applied allows for a strong electric field to be concentrated in the vicinity of the apex of the liquid meniscus and thus micro-dripping ejection of droplet takes place. That is, a tiny droplet is removed from the peak of the dome-shaped liquid meniscus. Electrostatic jetting of liquids is a physical process caused by an electric force applied to the surface of a liquid. The electrical shear stress elongates the liquid meniscus formed at the opening of the nozzle and generates a tiny droplet as a result of the balance between electrical and surface tension forces. This paper presents optimal conditions for applied voltage, electric conductivity, and flow rate for generating a stable drop-on-demand droplet using the micro-dripping mode. It is also verified experimentally that the use of the pole-type nozzle allows a stable and sustainable micro-dripping mode of droplet ejection for a wide range of applied voltages, demonstrating the feasibility of an electrostatic field induced drop-on-demand ink-jetting device as an alternative to conventional inkjet print heads. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：506 / 514

页数：9