The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2009
Filed:
May. 01, 2007
Didier Guerche, Conflans Ste Honorine, FR;
Serge Prigent, Asnieres sur Seine, FR;
Patrick Wehrer, La Garenne Colombes, FR;
Didier Guerche, Conflans Ste Honorine, FR;
Serge Prigent, Asnieres sur Seine, FR;
Patrick Wehrer, La Garenne Colombes, FR;
SNECMA, Paris, FR;
Abstract
A process for manufacturing a ceramic foundry core having at least one thin region with a thickness 'e', in particular in of a turbomachine blade trailing edge, including the forming in a mold of a mixture including a ceramic particle filler and an organic binder, the extraction of the core from the mold, the binder removal and consolidation heat treatment of the core. The process is one in which a core is formed in the mold, the region of this core being thickened relative to the thickness 'e' by an overthickness E and in which the overthickness is machined after the core has been extracted from the mold and before or after the heat treatment operation. In particular, the machining is carried out mechanically by milling, either with removal of chips on the cores before firing, or by abrasion on the fired cores.