The invention discloses a
metal 3D printer using atomized
metal as a printing material. The
metal 3D printer comprises a 3D printing unit, a metal atomization
control unit, a
control unit, a cooling
system, a mist extractor, and a finished workpiece automatic-discharging unit. The 3D printing unit comprises a
workbench, a
servo motor, a rotational structure, an atomized metal
spray nozzle, a liquid conveying
pipe, a heater and a cooler, wherein the atomized metal
spray nozzle is connected with an atomizing chamber through the liquid conveying
pipe. The metal atomization
control unit comprises a
smelting furnace, an atomizing furnace, a
thermocouple sensor, a liquid conveying tube and a melt valve, wherein the
smelting furnace is connected with the atomizing chamber through the liquid conveying tube. The finished workpiece automatic-discharging unit comprises an electric automatic door and a workpiece finished product box and is used for automatically discharging finished workpieces. According to the invention, ultra-micro
metal powder is not required, the kinds of selectable metal are multiple, appearance accuracy of printed metal devices is guaranteed, and the purpose that multiple metal materials which are randomly distributed are printed simultaneously can be achieved through simple improvement; in addition, due to the fact that a workpiece automatic-discharging structure is used, the function that the printer in a no-man control state can continuously print
multiple models is achieved.