Method for forming a wax model for a turbine blade

US11717880B2 · kind B2 · utility

Assignee

• SAFRAN · FR

Inventors

• Ramzi Bohli · Moissy-Cramayel, FR
• Mirna Bechelany · Courbevoie, FR
• Didier Dangeul · Moissy-Cramayel, FR
• Didier Maurice Marceau Guerche · Moissy-Cramayel, FR
• Alain Armel Le Hegarat · Moissy-Cramayel, FR
• Ngadia Taha Niane · Moissy-Cramayel, FR

Key dates

• Filing date: Jun 3, 2020
• Grant date: Aug 8, 2023
• Expiry date: Jun 3, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B33Y80/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for forming a wax model for the manufacture of turbine blades by lost-wax casting, in which a core is provided, a lower surface shell and an upper surface shell are positioned and bonded on either side of ducts of the core adjacent to the root, the core equipped with the lower surface shell and with the upper surface shell is positioned in an injection mold, wax is injected around the core equipped with the lower surface shell and with the upper surface shell, so as to form a wax model including a blade airfoil and a blade root including a fir tree, the lower surface shell and the upper surface shell being positioned around the core so as to form a portion of the fir tree of the wax model.