To develop low-cost additive manufacturing for metal parts, a methodology, namely, pneumatic extruding direct-writing deposition (PEDWD), is investigated in this paper. The deposition system mainly consists of a pressure and valve controller, temperature controller, three degree-of-freedom motion platform and computer system. By adopting the pressure of compressed nitrogen, molten metal was extruded on demand and deposited onto a substrate to form metal parts along the programmed track. A throttle channel was introduced into the structure desig...
