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:
Jul. 23, 2013
Filed:
Apr. 17, 2009
Christian Defrocourt, Franconville, FR;
Serge Prigent, Le Sappey en Chartreuse, FR;
Daniel Quach, Fontenay Sous Bois, FR;
Patrick Wehrer, Maisons Laffitte, FR;
Christian Defrocourt, Franconville, FR;
Serge Prigent, Le Sappey en Chartreuse, FR;
Daniel Quach, Fontenay Sous Bois, FR;
Patrick Wehrer, Maisons Laffitte, FR;
SNECMA, Paris, FR;
Abstract
A method for deburring a ceramic foundry core obtained by injecting a ceramic paste, the paste including a binder having a predetermined glass transition temperature, into a mold and having at least one surface portion with a surplus of material forming a burr to be eliminated. The method includes the following stages: a) disposing and attaching the molded, unfired foundry core onto a mounting; b) placing a milling tool, having an elongated shape with a helically cut edge, onto a tool holder; c) causing the tool to rotate around its axis and touching the milling tool to the surface portion to be deburred; and d) freezing the surface portion to be deburred such that the foundry core is maintained at a temperature lower than a glass transition temperature during the deburring operation.