Method for the manufacture of a shaped body as well as a green compact

US9393088B2 · kind B2 · utility

Assignee

• DeguDent GmbH · DE

Inventors

• Jörg HACHENBERG · Aschaffenburg, DE
• Rudi Steinke · Hanau, DE
• Markus Vollmann · Gelnhausen, DE
• Irmgard WISSEL · Alzenau, DE
• Gerhard ZELLMANN · Gelnhausen, DE
• Elmar Hock · Mömbris, DE
• Stefan Fecher · Goldbach, DE
• Lothar Volkl · Goldbach, DE

Key dates

• Filing date: Nov 9, 2011
• Grant date: Jul 19, 2016
• Expiry date: Apr 26, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2301/15
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method for manufacturing a shaped body, comprising creating a mixture of a metal powder and binding agent, compacting the mixture to form a green compact, heating the green compact to a debinding start temperature T1, debinding the green compact by controlled heating of the green compact from start temperature T1 to end temperature T2 at a heat-up rate R1, presintering the debindered green compact to the presinter end temperature TVS at a heat-up rate RHVS, cooling the green compact from the presinter end temperature TVS at a cool-down rate RKVS, whereby at least the heat-up rate RHVS, the presinter end temperature TVS, and the cool-down rate RKVS are tuned relative to each other in such a way that the presintered green compact forming a blank has a surface porosity of 16% to 22% after presintering, and machining and sintering of the blank to form the shaped body.