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RAPID ELECTRO-MAGNETIC HEATING OF NOZZLE IN POLYMER EXTRUSION BASED DEPOSITION FOR ADDITIVE MANUFACTURING

United States Patent Application

20150183164
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method and apparatus for additive manufacturing that includes a nozzle for extruding a plastic material and a supply of polymeric working material provided to the nozzle, wherein the polymeric working material is magnetically susceptible and/or electrically conductive. A magneto-dynamic heater is provided for producing a time varying, high flux, frequency sweeping, alternating magnetic field in the vicinity of the nozzle to penetrate into and couple the working material to heat the material through at least one of an induced transient magnetic domain and an induced, annular current.
DUTY, Chad E. (Loudon, TN), KUNC, Vlastimil (Concord, TN), LOVE, Lonnie J. (Knoxville, TN), RIOS, Orlando (Knoxville, TN)
14/ 143,934
December 30, 2013
GOVERNMENT RIGHTS [0001] This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.