Abstract:
Deterioration of a shaped object is prevented. There is provided an optical processing nozzle including an optical system in which a condensing point is adjusted to a processing point, a first set of fluid mixture discharge pipes that discharges, to the processing point, a material/purge gas fluid mixture obtained by mixing a purge gas in a powder processing material, and a second set of purge gas discharge pipes that discharges a purge gas having a purge function to the first set of fluid mixture discharge pipes, each of the fluid mixture discharge pipes of the first set being associated with each of the purge gas discharge pipes of the second set.
Abstract:
Ejection and stop of a powder flow are switched while maintaining a once generated steady flow without stopping it. A processing nozzle includes a supply source of a fluid containing a powder, a first channel through which the fluid supplied from the supply source passes, a second channel that supplies the fluid to an ejection port of the nozzle, a third channel that releases the fluid outside the nozzle, and a switch that causes the first channel and the second channel to communicate with each other when supplying the fluid to the ejection port, and causes the first channel and the third channel to communicate with each other when not supplying the fluid to the ejection port.