Powder distribution device and 3D printing device including same

A powder distribution device for supplying powder to a powder-based 3D printing device, the powder distribution device comprising:

• a powder distribution unit including an outer frame having a powder material inlet port and a plurality of distribution plates disposed in the outer frame and distributing introduced powder,
• wherein the plurality of distribution plates include a first distribution plate disposed below the powder material inlet port, and a pair of second distribution plates respectively disposed below both ends of the first distribution plate,
• wherein each of the first distribution plate and the pair of second distribution plates are spaced apart by a predetermined interval from a powder discharge surface from which powder is discharged, and wherein each of the first distribution plate and the pair of second distribution plates has two inclined side surfaces that guide powder discharged from the powder discharge surface to fall to lower sides of the respective first distribution plate and pair of second distribution plates,
• wherein each inclined side surface of the first distribution plate and the pair of second distribution plates includes a plurality of through-holes formed so that the powder can fall through each of the first distribution plate and the pair of second distribution plates to a lower side, and a diameter of the plurality of through-holes gradually increases in a downward direction along the length of each of the inclined side surfaces, and
• wherein center portions of the pair of second distribution plates are spaced apart horizontally by a predetermined interval from the opposite ends of the first distribution plate, and wherein the center portions are positioned to distribute the powder falling from the first distribution plate.