US 11,980,943 B2
Device and a method for fabricating a three-dimensional part by selectively melting a powder bed
Jean-Baptiste Mottin, Moissy-Cramayel (FR); and Guillaume Fribourg, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
Filed on Jul. 22, 2021, as Appl. No. 17/382,850.
Application 17/382,850 is a division of application No. 16/062,548, granted, now 11,141,793, previously published as PCT/FR2016/053305, filed on Dec. 9, 2016.
Claims priority of application No. 1562291 (FR), filed on Dec. 14, 2015.
Prior Publication US 2021/0346961 A1, Nov. 11, 2021
Int. Cl. B22F 5/04 (2006.01); B22F 3/00 (2021.01); B22F 7/06 (2006.01); B22F 10/28 (2021.01); B22F 12/57 (2021.01); B22F 12/58 (2021.01); B29C 64/153 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01); B33Y 40/10 (2020.01); B22F 10/73 (2021.01); B22F 12/63 (2021.01)
CPC B22F 5/04 (2013.01) [B22F 3/003 (2013.01); B22F 7/06 (2013.01); B22F 10/28 (2021.01); B22F 12/57 (2021.01); B22F 12/58 (2021.01); B29C 64/153 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B33Y 40/10 (2020.01); B22F 10/73 (2021.01); B22F 12/63 (2021.01); B22F 2203/15 (2013.01); B22F 2207/01 (2013.01); B22F 2301/15 (2013.01); B22F 2303/405 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); Y02P 10/25 (2015.11)] 13 Claims
OG exemplary drawing
 
1. A method of fabricating a three-dimensional part by selectively melting a powder bed, the part comprising a successive stack of layers, the method comprising the following steps for fabricating one layer:
a) delivering a monitored quantity of a first powder from a first tank;
b) delivering a monitored quantity of a second powder different from the first powder from a second tank;
c) mixing the first powder and the second powder as delivered in steps a) and b);
d) depositing a layer of the mixture of the first powder and the second powder obtained in step c); and
e) melting at least a portion of the layer of the mixture deposited in step d),
wherein the first powder presents a first grain size and the second powder presents a second grain size, the first grain size being different from the second grain size,
wherein the mixing at step c) comprises:
mixing the first powder and the second powder within a mixer chamber, the mixing chamber comprising an inlet orifice and an outlet orifice for a gas stream inside the mixer chamber, said gas stream inlet and outlet orifices being configured to cause a gas to flow in the mixer chamber so as to mix the first powder and the second powder contained in said mixer chamber, and
wherein the outlet orifice has a protection cover configured to prevent powder from escaping from the mixer chamber via said outlet orifice, and said method further comprising preventing powder from escaping from the mixer chamber via said outlet orifice using the protection cover.