RAPID NON-CONTACT ENERGY TRANSFER FOR ADDITIVE MANUFACTURING DRIVEN HIGH INTENSITY ELECTROMAGNETIC FIELDS

摘要

A method and apparatus for additive manufacturing that includes a nozzle and/or barrel 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 method of additive manufacturing comprising the steps of:
a. providing an apparatus for additive manufacturing, the apparatus including a nozzle for extruding a material; b. operably contacting the nozzle with a polymeric working material that has at least one of the properties:
i. magnetically susceptible, andii. electrically conductive; c. producing a time varying, high flux, frequency sweeping, alternating magnetic field in the vicinity of the nozzle so that at least one of the following processes occurs:
i. the time varying magnetic field penetrates into and is coupled by the magnetically susceptible working material to induce transient magnetic domains resulting in heating of the magnetically active components; andii. the transient magnetic field penetrates into and is coupled by the electrically conductive working material to generate an induced, annular current that causes direct electrical resistive heating of the material.