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

摘要

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.

主权项

1. A printing nozzle for use in polymer extrusion based deposition for additive manufacturing comprising:
a material guide for permitting a desired flow of a working material; a tip positioned at an end of the material guide for depositing the working material in an appropriate position in space; and an electro-magnetic heating element positioned with respect to the material guide.