Operating Voltage Effects on Bubble Growth Dynamics of Thermal Inkjet Printheads
Abstract:The ejection performance and printing quality of a thermal inkjet printhead are significantly affected by bubble growth dynamics. This study investigated bubble growth dynamics and the ink ejection process under various heating conditions that are controlled by driving voltages. Numerical predictions are presented for bubble generating time, volume, temperature and pressure. The numerical computations suggest that a three-step voltage control method results in a larger ink-ejection velocity than a onestep voltage control method, even though the former generates less thermal energy. Through simulation, it can be shown that the three-step voltage control method actually has a larger heat flux rate from the printhead heater to the ink chamber when the ink is nucleated. Therefore a larger bubble pressure and a faster ink ejection are generated. This prediction is verified by the experimental results.
Document Type: Research Article
Publication date: 2002-01-01
For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.
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