公开(公告)号：US20240399445A1

公开(公告)日：2024-12-05

申请号：US18667726

申请日：2024-05-17

Applicant: ROLLS-ROYCE PLC

Inventor： Neil D'SOUZA ,  Kevin GOODWIN ,  John D LEHANE ,  Martin R PERRY

IPC: B22C9/04 ,  B22C7/02 ,  B22D25/06 ,  B22D27/20

Abstract: A method of manufacturing a component includes forming a mould assembly including an initial mould unit, providing a seed crystal including a primary growth direction, determining an optimal angular orientation of the unit, rotating the unit to dispose the unit's optimal angular orientation, encasing the unit in a refractory material, and forming a refractory mould unit having a component mould including a mould wall defining a mould cavity, and a seed holder. In the optimal angular orientation, the seed crystal's primary growth direction is angled away from the wall, thereby forming a converging disposition with the wall in a of the wall's first region facing the central sprue and a diverging disposition with the wall in the wall's second region facing a mould heater. The method includes receiving the seed crystal within the seed holder and filling the mould cavity with molten castable material to form the component.