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

摘要

According to an embodiment of the present invention, since the irradiation is performed by forming a predetermined pattern rather than a unidirectional linear irradiation when irradiating with laser light, the range of remelting and reheating of the powder material is increased, thereby It provides a 3D printing device that can realize high density and residual stress control for the molten part of A 3D printing apparatus capable of controlling a light irradiation pattern according to an embodiment of the present invention includes: a powder bed part filled with a material material in a powder form and moving the material material; A build part receiving material material from the powder bed part and performing molding on the material material; A heat source unit for forming each modeling layer by irradiating light to the material material of the build unit; A mirror unit for controlling a path of light by reflecting light emitted from the heat source unit; A heat source driving unit coupled to the heat source unit and driving the heat source unit so that a light emission point from which light is emitted from the heat source unit performs a pattern movement; And a mirror driving unit coupled to the mirror unit and driving the mirror unit so that the mirror unit performs a tilt motion.