3D 3D 3D PRINTING DEVICE ABLE TO CONTROL PATTERN OF LASER LIGHT IRRADIATION AND METHOD OF 3D PRINTING USING THE SAME

摘要

The present invention provides a three-dimensional printing device which forms a prescribed pattern to perform emission instead of unidirectional linear emission when emitting a laser light to increase a remelting and reheating range for a powder material to realize high density and residual stress control for a melted portion of the powder material. According to embodiments of the present invention, the three-dimensional printing device capable of controlling a light emission pattern comprises: a powder bed unit allowing a material of a powder form to be filled therein and moving the material; a build unit to receive the material from the powder bed unit, and perform shaping on the material; a heat source unit to emit a light to the material of the build unit to form shaping layers; a mirror unit to reflect the light emitted from the heat source unit to control a path of the light; a heat source driving unit which is coupled to the heat source unit, and drives the heat source unit to allow a light emission point at which the light is emitted by the heat source unit to perform a pattern motion; and a mirror driving unit which is coupled to the mirror unit, and drives the mirror unit to allow the mirror unit to perform a gradient motion.