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A New Ejector for Highly Viscous Liquid Using Inertia of Beam Buckling Deformation

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This paper describes a newly developed ejector that uses the inertia of beam buckling deformation, which can eject highly viscous liquids of over 30mPas at room temperature, to be used for fabrication of uniform spherical particles. The ejector is simply a beam consisting of a fluid path and a nozzle located at the approximate center in the longitudinal direction. By applying compression and rotation, the concave bend of the beam gradually changes its shape in the ejecting direction, starting from both longitudinal ends. When this change approaches the center, a sudden reversal buckling occurs and the droplet is separated from the meniscus by the force of the inertia. Adequate conditions for ejecting small droplets of highly viscous liquids were estimated both from the results of experiments and fluid simulations. Requisite inertia was lowered with ease by forming rear-side openings in the fluid path. The authors also demonstrated case examples with the use of an ejector that was experimentally created.

Document Type: Research Article

Publication date: 2009-01-01

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  • 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.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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