US 11,745,255 B2
Method for manufacturing a ceramic core for manufacturing turbomachine vanes
Adrien Bernard Vincent Rollinger, Moissy-Cramayel (FR); Alice Marie Lydie Agier, Moissy-Cramayel (FR); and Gael Philippe François Battistoni, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 17/753,292
Filed by SAFRAN, Paris (FR)
PCT Filed Aug. 27, 2020, PCT No. PCT/FR2020/051507
§ 371(c)(1), (2) Date Feb. 25, 2022,
PCT Pub. No. WO2021/038174, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 1909534 (FR), filed on Aug. 30, 2019.
Prior Publication US 2022/0288671 A1, Sep. 15, 2022
Int. Cl. B22C 9/10 (2006.01); B22C 7/02 (2006.01)
CPC B22C 9/103 (2013.01) [B22C 7/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for manufacturing a ceramic core blank for the manufacture of hollow turbomachine blades using the technique of lost wax casting, the blank being manufactured by additive manufacturing and comprising:
at least one first part for forming cavities of the hollow blades,
at least one second part configured to allow positioning of the ceramic core in a wax mold, the at least one second part and the at least one first part being positioned and held with respect to one another by means of a temporary junction portion interposed between the at least one first part and the at least one second part,
at least one through orifice extending through the at least one second part, the temporary junction portion and the at least one first part, a first end of the at least one through orifice opening to an outer face of the at least one second part, and a second end of the at least one through orifice opening to an outer face of the at least one first part.
 
14. A ceramic core blank for the manufacture of hollow turbomachine blades using the technique of lost wax casting, comprising:
at least one first part for forming cavities of the hollow blades,
at least one second part configured to allow positioning of the ceramic core in a wax mold, the at least one second part and the at least one first part being positioned and held with respect to one another by means of a temporary junction portion interposed between the at least one first part and the at least one second part,
at least one through orifice extending through the at least one second part, the temporary junction portion and the at least one first part, a first end of the at least one through orifice opening to an outer face of the at least one second part and a second end of the at least one through orifice opening to an outer face of the at least one first part.