Air entrapment in piezo-driven inkjet printheads
Air entrapment in piezo-driven inkjet printheads
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DOI：
10.1121/1.2216560
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发表时间：
2006-09-01
影响因子：
2.4
通讯作者：
Lohse, Detlef
中科院分区：
文献类型：
--
作者：
de Jong, Jos;de Bruin, Gerrit;Lohse, Detlef
喷墨打印机的稳定性是高质量打印的主要要求。然而，在压电驱动喷墨打印头中，空气滞留可能导致喷射形成故障。压电致动器用于主动监测通道声学并在早期阶段识别失真。压电执行器响应的变化表明存在气泡，这使我们能够对其进行研究。当我们使用信号作为高速成像的触发器时，我们可以可视化夹带气泡对液滴形成的影响。研究发现有两种机制会导致空气滞留：首先，小颗粒会导致液滴形成扭曲，其次，墨水在喷嘴板上积聚，一旦弯液面被拉回，就会有利于形成空隙。 (c) 2006 年美国声学学会。
The stability of inkjet printers is a major requirement for high-quality-printing. However, in piezo-driven inkjet printheads, air entrapment can lead to malfunctioning of the jet formation. The piezoactuator is employed to actively monitor the channel acoustics and to identify distortions at an early stage. Modifications of the response of the piezoactuator indicate entrapped air bubbles and these allow us to investigate them. When we employ the signal as a trigger for high-speed imaging, we can visualize the consequences of the entrained bubbles on the droplet formation. Two mechanisms are found to cause air entrapment: First, a distorted droplet formation caused by small particles, and, second, an accumulation of ink on the nozzle plate, which favors void formation once the meniscus is pulled back. (c) 2006 Acoustical Society of America.