US 9,808,864 B2
Three dimensional printer
Shuichi Kawada, Kanagawa (JP); Katsutaka Muranaka, Kanagawa (JP); and Shuji Okazaki, Kanagawa (JP)
Assigned to Sodick Co., Ltd., Kanagawa (JP)
Filed by Sodick, Co., Ltd., Kanagawa (JP)
Filed on Sep. 18, 2015, as Appl. No. 14/858,036.
Claims priority of application No. 2014-207128 (JP), filed on Oct. 8, 2014.
Prior Publication US 2016/0101469 A1, Apr. 14, 2016
Int. Cl. B22F 3/10 (2006.01); B22F 3/105 (2006.01); B33Y 30/00 (2015.01); B29C 67/00 (2017.01)
CPC B22F 3/1007 (2013.01) [B22F 3/1055 (2013.01); B29C 67/0077 (2013.01); B29C 67/0085 (2013.01); B33Y 30/00 (2014.12); B22F 2003/1056 (2013.01); Y02P 10/295 (2015.11)] 8 Claims
OG exemplary drawing
 
1. A lamination molding apparatus, comprising:
a molding room covering a predetermined molding region and filled with an inert gas having a predetermined concentration;
a laser beam emitter to irradiate a predetermined portion of a material powder layer formed on the molding region with a laser beam, thereby sintering the material powder at a position of irradiation to form a sintered body;
a processing head structured to be capable of being moved in the molding room, the processing head providing a machine processing to the sintered body;
a driving device housing room provided adjacent to the molding room, the driving device housing room housing a driving device moving the processing head;
a partitioning section to partition the molding room from the driving device housing room;
a discharging section to discharge gas in the molding room; and
an inert gas supplying apparatus to supply the inert, gas to both of the molding room and to the driving device housing room;
wherein a communicating section is in the partitioning section, the communicating section allowing communication between, the driving device housing room and the molding room; and
the communicating section has a size allowing to maintain a pressure of the driving device housing room supplied with the inert gas to be higher than a pressure of the molding room.