Lamination molding apparatus

A lamination molding apparatus comprising:

• a chamber,
• a recoater head, and
• a recoater head driving mechanism,
• wherein the chamber covers a molding region and is filled with an inert gas at a predetermined concentration,
• the recoater head comprises a material case for accommodating material powder and an outer frame supporting the material case and is configured to be moved in a horizontal direction by the recoater head driving mechanism so as to form a material powder layer by supplying and planarizing the material powder onto the molding region while moving in the chamber,
• the material case further comprises a case outlet for discharging the material powder accommodated inside the material case and a pair of inclined side surfaces arranged with the case outlet interposed therebetween,
• the pair of inclined side surfaces are inclined toward the case outlet so that inclination angles between a horizontal plane and the inclined side surfaces differ from each other by 10 to 50 degrees,
• the inclination angles are selected so the material powder falls along the inclined side surfaces at different speeds toward the case outlet with the inclination angle of a first of the inclined side surfaces terminating prior to the case outlet and with the inclination angle of a second of the inclined side surfaces extending to the case outlet,
• the recoater head driving mechanism comprises a motor for moving the recoater head and a control unit, and
• the control unit is configured to vibrate the recoater head to facilitate discharge of the material powder through the case outlet.