US 12,070,798 B2
Additive manufacturing with in-situ magnetic field source
Cajetan Ikenna Niebedim, Ames, IA (US); Abhishek Sarkar, Ames, IA (US); Matthew J. Kramer, Ankeny, IA (US); Thomas Lograsso, Ames, IA (US); Mark Christopher Haase, Cedar Park, TX (US); Somashekara Adinarayanappa, Katnataka (IN); and Mariappan Parans Paranthaman, Knoxville, TN (US)
Assigned to Iowa State University Research Foundation, Inc., Ames, IA (US); and UT-Battelle, LLC, Oak Ridge, TN (US)
Filed by Iowa State University Research Foundation, Inc., Ames, IA (US); and UT-Battelle, LLC, Oak Ridge, TN (US)
Filed on Apr. 15, 2021, as Appl. No. 17/300,213.
Claims priority of provisional application 63/204,738, filed on Oct. 21, 2020.
Claims priority of provisional application 63/010,718, filed on Apr. 16, 2020.
Prior Publication US 2021/0323070 A1, Oct. 21, 2021
Int. Cl. B22F 12/53 (2021.01); B22F 10/34 (2021.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01); B33Y 70/00 (2020.01)
CPC B22F 10/34 (2021.01) [B22F 12/53 (2021.01); B22F 2202/05 (2013.01); B22F 2302/25 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B33Y 70/00 (2014.12)] 11 Claims
OG exemplary drawing
 
1. An electromagnet alignment system for in-situ alignment of magnetic particulate material passing through a tubular dispensing nozzle body of a deposition head of a 3D deposition device for deposition to form a 3D shape, comprising:
at least one electromagnet having an electromagnet coil disposed around a magnetic flux-conducting core having a core configuration to provide at least one pair of spaced apart first and second opposing magnetic pole surfaces of the core, said coil comprising a winding having a size that is larger than space surrounding a frustoconical discharge end of the dispensing nozzle body,
an electromagnet support structure comprising a platform that is mounted on the deposition head separate from and above the dispensing nozzle body and on which the electromagnet coil is supported above the space surrounding the frustoconical discharge end of the dispensing nozzle so as to position the at least one pair of first and second magnetic pole surfaces of the core in the space adjacent to respective peripheral surfaces of the frustoconical discharge end of the dispensing nozzle body to establish, when the coil is energized, a magnetic field extending between the at least one pair of first and second magnetic pole surfaces in a transverse direction to a longitudinal axis of the frustoconical discharge end of the dispensing nozzle body during dispensing of the magnetic particulate material through the frustoconical discharge end of the dispensing nozzle body, and
a power source that energizes the electromagnet coil to provide the magnetic field in said transverse direction between the magnetic pole surfaces of the core during dispensing of the magnetic particulate material through the dispensing nozzle body so that the magnetic field at least partially aligns the magnetic particulate material toward said transverse direction to the longitudinal axis of the frustoconical discharge end of the dispensing nozzle body.