Three dimensional printer

A lamination molding apparatus with a molding table, comprising:

• a first galvanometer scanner configured to be capable of irradiating a predetermined first small irradiation region on the molding table with a first laser beam;
• a second galvanometer scanner configured to be capable of irradiating a predetermined second small irradiation region on the molding table with a second laser beam;
• first inert gas supplying nozzle having first inert gas supplying opening for supplying an inert gas;
• a second inert gas supplying nozzle having a second inert gas supplying opening for supplying an inert gas;
• a first fume suction duct having a first fume suction opening for suctioning the inert gas containing fumes generated with irradiation of the first laser beam;
• a second fume suction duct having a second fume suction opening for suctioning the inert gas containing fumes generated with irradiation of the second laser beam;
• an integration unit integrally including the first galvanometer scanner, the second galvanometer scanner, the first inert gas supplying nozzle, the second inert gas supplying nozzle, the first fume suction duct and the second fume suction duct;
• and
• a moving device configured to move the integration unit so that the first galvanometer scanner scans and irradiates the first laser beam on a predetermined first large irradiation region larger than the predetermined first small irradiation region on the molding table, and the second galvanometer scanner scans and irradiates the second laser beam on a predetermined second large irradiation region larger than the predetermined second small irradiation region on the molding table;
• wherein the first inert gas supplying opening and the first fume suction opening are provided to be opposed to each other so that an irradiation path of the first laser beam is placed therebetween and
• the second inert gas supplying opening and the second fume suction opening are provided to be opposed to each other so that an irradiation path of the second laser beam is placed therebetween.