Process for the manufacture of thin ceramic cores for use in precision casting

US6286582A · kind A · utility

Assignee

• Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.C.M.A · FR

Inventors

• Thierry Chartier · Riom, FR
• Vincent Louis Christian David · Bourges, FR
• Mischael F. L. Derrien · Montereau-Fault-Yonne, FR
• Eric Eberschveiller · Persan, FR
• Franck Edmond Maurice Truelle · Argenteuil, FR
• Isabelle Marie Monique Valente · Moissy-Cramayel, FR

Key dates

• Filing date: Nov 9, 1999
• Grant date: Sep 11, 2001
• Expiry date: Nov 9, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22C1/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for the manufacture of a thin ceramic core involves casting a band of uniform thickness on a support from a solution of a ceramic material based on silica and zircon in a binder, drying the band, shaping the band in a mold and carrying out preheating and pressing of the band in the mold, baking the component thus obtained in a ceramic preform, and then carrying out an impregnation. The thin core obtained can be assembled together with another thin core and/or on a conventional thick central core, and can be used in precision casting such as in the production of turbine blades.