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首页> 外文期刊>Physics of fluids >First drop dissimilarity in drop-on-demand inkjet devices
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First drop dissimilarity in drop-on-demand inkjet devices

机译：按需喷墨设备中的首次墨滴差异

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摘要

As inkjet printing technology is increasingly applied in a broader array of applications, careful characterization of its method of use is critical due to its inherent sensitivity. A common operational mode in inkjet technology known as drop-on-demand ejection is used as a way to deliver a controlled quantity of material to a precise location on a target. This method of operation allows ejection of individual or a sequence (burst) of drops based on a timed trigger event. This work presents an examination of sequences of drops as they are ejected, indicating a number of phenomena that must be considered when designing a drop-on-demand inkjet system. These phenomena appear to be driven by differences between the first ejected drop in a burst and those that follow it and result in a break-down of the linear relationship expected between driving amplitude and drop mass. This first drop, as quantified by high-speed videography and subsequent image analysis, can be different in morphology, trajectory, velocity, and volume from subsequent drops within a burst. These findings were confirmed orthogonally by both volume and mass measurement techniques which allowed quantitation down to single drops.
机译：随着喷墨打印技术越来越广泛地应用于更广泛的应用中，由于其固有的灵敏度，对其使用方法进行仔细表征至关重要。喷墨技术中一种常见的操作模式，称为按需滴墨，是一种将受控数量的材料输送到目标上精确位置的方法。这种操作方法允许根据定时触发事件喷射单个或一系列液滴（突发）。这项工作将对液滴喷出时的顺序进行检查，指出在设计按需喷墨系统时必须考虑的多种现象。这些现象似乎是由突发中的第一个喷射液滴与随后的液滴之间的差异驱动的，并导致驱动振幅和液滴质量之间预期的线性关系破裂。通过高速摄影和随后的图像分析所量化的第一滴，其形态，轨迹，速度和体积可能与突发中的后续滴不同。这些发现已通过体积和质量测量技术正交确认，从而可以定量直至单滴。

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