Asymmetric Detachment from Angled Nozzles Plates in Drop-on Demand Inkjet Printing
Abstract:The effects of nozzle plate defects on droplet jetting behavior and directionality are studied numerically and experimentally. In particular, we examine the mechanism responsible for the phenomenon of tail-hooking, where break-up occurs at a point on the side of the nozzle, rather than on the central axis. We investigate how nozzle defects lead to this breaking of jet axisymmetry. Fully three-dimensional simulations through nozzle geometry were performed using Flow3D software are compared with experiments performed on a large scale model of a drop on demand inkjet print-head. For nozzles plates in which the outer surface is not perfectly aligned with the nozzle axis, we observe asymmetric break-off. The directionality of main droplets is not greatly affected by the nozzle angle but the behavior and directionality of the satellite droplets is dramatically altered.
Document Type: Research Article
Publication date: 2013-01-01
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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