DEVICE AND METHOD OF INJECTING METAL

摘要

A metal injection device has a discharge nozzle (31) for discharging molten metal (20) and a gas flow passage (33) for feeding an inert gas around a discharge opening (32) of the discharge nozzle (31). A nozzle cover (34) is provided at the exit of the discharge opening (32) and that of the gas flow passage (33). The nozzle cover (34) has a space (35) communicating with the exits of the discharge opening (32) and the gas flow passage (33) and opening downward. At the periphery of the opening is a ring-like projection (36). In injecting the molten metal (20) from the discharge opening (32) into the space (35), feeding the inert gas to the space (35) prevents oxidation of the metal (20) and nozzle clogging in the discharge opening (32), and can make the shape of the metal (20) spherical.