公开(公告)号：US20200324341A1

公开(公告)日：2020-10-15

申请号：US16844524

申请日：2020-04-09

Applicant: XEROX CORPORATION

Inventor： Chu-Heng Liu ,  Scott James Vader ,  PAUL J. MCCONVILLE ,  DAVID A. MANTELL ,  Christopher T. Chungbin ,  Peter M Gulvin

IPC: B22F3/105

Abstract: 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.

公开(公告)号：US20200262133A1

公开(公告)日：2020-08-20

申请号：US16789771

申请日：2020-02-13

Applicant: XEROX CORPORATION

Inventor： Scott James Vader ,  Zachary S. Vader ,  CHU-HENG LIU

IPC: B29C64/106 ,  B29C64/209

Abstract: A method of additive manufacturing includes jetting liquid material on a workpiece defining an uphill local surface and a downhill local surface. A printhead moves relative to the workpiece in a process direction, over the uphill local surface and the downhill local surface. Liquid material is jetted from the moving printhead onto the uphill local surface of the workpiece at a first predetermined spatial resolution. In a first approach, the printhead is controlled to refrain from jetting liquid material onto the downhill local surface of the workpiece. In a second approach, a local slope of the workpiece is determined, and a spatial resolution for jetting liquid material onto the local surface is determined as a function of the local slope.