POWDER INJECTION NOZZLE FOR 3D LASER PRINTING

摘要

The present invention relates to a powder supply nozzle (1000) for a three-dimensional laser printing. The powder supply nozzle comprises: a body (100) which has a conical shape wherein an upper portion is wide and a lower portion is narrow; a first laser hole (110) formed on a center of the body (100) through which a laser heat source passes; a cover (200) provided to surround an outer surface of the body (100); and a plurality of powder flow passages (120) provided between the body (100) and the cover (200), has a predetermined inclination with respect to an axis of the body (100), and is formed in a clockwise or a counterclockwise spiral shape with respect to a center of the body (100), wherein the powder rotates in the center direction along a circumferential surface of the body (100) at the time of supplying the powder, and moves from an upper portion to a lower portion of the body (100).