Additive Technologies LLC

Kareem Tawil

Palghat Srinivas Ramesh

Alexander J Fioravanti

Christopher T Chungbin

Dinesh Krishna Kumar Jayabal

Viktor Sukhotskiy

David A Mantell

A method includes ejecting a plurality of drops of a build material from a nozzle of a 3D printer. The build material cools and solidifies after being ejected to form a 3D object. The method also includes controlling an oxidation of the drops, the 3D object or both to create different oxidation levels in first and second portions of the 3D object.

Atmosphere and part formation in a liquid metal drop-on-demand printer

A 3D printer includes an ejector configured to receive a build material. The 3D printer also includes a valve configured to control flow of the build material into or through the ejector. The valve includes a cooler configured to cool the build material to below a melting point of the build material to form a solid plug to prevent the build material from flowing therethrough. The valve also includes a heater configured to re-heat the build material to above the melting point to allow the build material to flow therethrough. The 3D printer also includes a nozzle positioned downstream from the valve. The build material is ejected through the nozzle. The 3D printer also includes a substrate positioned below the nozzle. The build material lands on the substrate and cools and solidifies thereon to form a 3D object.

System and method for controlling flow through a 3D printer

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Pittsford, NY, United States of America

Kareem Tawil