Three-dimensional printer head for printing metal articles

A three-dimensional printer head for printing metal articles, the printer head comprising:

• a nozzle that is heat resistant and with low electric conductivity;
• an embedded channel within the nozzle and running along a longitudinal length of the nozzle;
• a receiving space at a first end of the embedded channel in which a solid metal material is received;
• an extrusion space at a second end of the embedded channel from which a continuous bead of liquid or semisolid metal material is extruded;
• a feeder mechanism that continuously drives the solid metal material into the embedded channel through the receiving space;
• an induction coil surrounding an outer surface of the nozzle and extending over a portion of the longitudinal length of the nozzle;
• a coil driver modulating the induction coil at a frequency sufficient to produce a magnetic field capable of passing through the nozzle to heat the solid metal material within the embedded channel inductively;
• and
• the heat produced by the inductive coil is sufficient to produce the continuous bead of a liquid or semisolid metal material exiting the nozzle at the extrusion space.