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公开(公告)号：US11883879B1
公开(公告)日：2024-01-30
申请号：US17930226
申请日：2022-09-07
摘要： 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.
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公开(公告)号：US12083599B2
公开(公告)日：2024-09-10
申请号：US16844524
申请日：2020-04-09
发明人： Chu-Heng Liu , Scott James Vader , Paul J. Mcconville , David A. Mantell , Christopher T. Chungbin , Peter M Gulvin
摘要： The nozzles of a MHD liquid metal ejector/printhead can be clogged by contaminants in the liquid metal. Typically, these contaminants are in the form of small particles of aggregates of particles, such as metal oxides, that are insoluble in the liquid metal. Possible cleaning methods include mechanically removing the clogging material, such as by using a physical device to dislodge the clogging material and remove it; chemically removing the clogging material, such as by using selected chemicals/flux to chemically react with the clogging material; using ultrasound to break/remove the clogging material; and providing reversed and/or oscillating flow of material through the nozzle.
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