Method for producing a multipart construction and such a construction

US8501082B2 · kind B2 · utility

Assignee

• DeguDent GmbH · DE

Inventors

• Elmar Hock · Mömbris, DE
• Stefan Fecher · Goldbach, DE
• Lothar Volkl · Goldbach, DE

Key dates

• Filing date: Dec 21, 2007
• Grant date: Aug 6, 2013
• Expiry date: Feb 18, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2237/84
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for manufacturing a multipart assembly of sintered oxide ceramic material, including one first component which at least partially surrounds one second component in such a manner that detaching the first component from the second component is not possible without destroying the first and/or second component. The assembly is produced by producing a single-part first shaped part and a single-part second shaped part from an oxide ceramic blank, whereby the first shaped part and the second shaped part are enlarged to compensate for the shrinkage during sintering, and assembling the sintered shaped part as second component with the first shaped part and subsequently sintering them together. As the first shaped part is employed a shaped part with an opening whose effective cross section after sintering is either smaller than the effective cross section of the second shaped part after sintering in a region that extends within the first component, or is smaller that the effective cross section of the second component in front of and behind the opening.