US 11,938,575 B2
Manufacturing process for blades of a turbo machine and blades for a turbo machine
Graham J Bing, Derby (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Jun. 1, 2022, as Appl. No. 17/829,492.
Claims priority of application No. 2109321 (GB), filed on Jun. 29, 2021.
Prior Publication US 2023/0055845 A1, Feb. 23, 2023
Int. Cl. B22D 25/02 (2006.01); B22C 9/10 (2006.01); B23P 15/02 (2006.01)
CPC B23P 15/02 (2013.01) [B22C 9/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A process for manufacturing turbomachine blades, the process comprising:
a) positioning in a wax forming device a ceramic core piece that comprises at least two ceramic core elements and a clamping part that connects the ceramic core elements, subsequently;
b) applying a molten wax material to an outside of the ceramic core piece in the wax forming device and allowing the wax to solidify, subsequently;
c) casting at least two turbomachine blades using a crystallographically-oriented metal casting process and removing the wax and the ceramic core piece to form a blade cast piece, and subsequently;
d) cutting the blade cast piece to separate the at least two turbomachine blades from each other.