Design Studies on Ink Jet Printhead to Improve its Throughput
Firstly, acoustic period of a drop ejector is shortened by reduction in pressurizing cavity area, or bend mode actuator compliance. This modification worked as intended but made the drop ejection speed slower due to decrease in cavity volume deformation. In order to compensate the pressure fall, drive voltage rise to 109% of original design.
Secondly, for higher flow rate inside the manifold, they are expanded in cross sectional area, not in their thickness but by their depth particularly, or dimension in perpendicular direction to print width horizontally. It is due to restriction for the expansion in height, not to extend descender together that has influence on acoustic period. As a result, cross sectional area of the manifolds are increased 14 % from original design by 5 mm expansion of printhead dimension in depth.
By implementation of all these design changes, newly developed printhead can be driven up to 40 kHz with 12 pl drop from same number of nozzles as original model. In spite of 32% higher flow rate from the original model, the developed model show stable printing performance up to 1,680 mm/s
Document Type: Research Article
Publication date: 2012-01-01
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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