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首页> 外文期刊>Journal of Imaging Science and Technology >A Continuous Ink Jet Device on the Basis of Electrohydrodynamic Mechanism
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A Continuous Ink Jet Device on the Basis of Electrohydrodynamic Mechanism

机译：基于电动流体力学原理的连续喷墨装置

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摘要

A new type of ink jet system is proposed on the basis of electrohydrodynamic (EHD) effect. On the application of high DC electric fields to some insulating fluids, a fluid jet with a velocity of about 1 ms~(-1) is generated from the positive electrode as a bulk flow. By controlling the EHD flow to issue across the free surface, the ink jet device is developed, of which the nozzle unit is simply composed of a needle electrode and capillary. When the fluids are subjected to high electric fields, the ink jet is generated above a critical threshold and the height increases with increasing voltage. The critical voltage strongly depends on the nozzle geometry. The height of ink jet at high voltages increases with decreasing viscosity and conductivity of fluids. The performance of ink jet based on the EHD jet can be improved by a combination of designs of nozzle geometry and material functions.
机译：基于电动流体动力学（EHD）效应，提出了一种新型的喷墨系统。在一些绝缘流体上施加高直流电场时，正电极会以整体流的形式产生速度约为1 ms〜（-1）的流体射流。通过控制EHD液流穿过自由表面，可以开发出一种喷墨装置，其喷嘴单元仅由针电极和毛细管组成。当流体经受高电场时，在临界阈值以上会产生喷墨，并且高度会随着电压的增加而增加。临界电压在很大程度上取决于喷嘴的几何形状。高压下的喷墨高度随着流体的粘度和电导率的降低而增加。通过结合喷嘴几何形状和材料功能的设计，可以提高基于EHD喷墨的喷墨性能。

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