Method for producing a green compact using a pressing tool, a pressing tool, a green compact, and a sintered part

US11318533B2 · kind B2 · utility

Assignee

• GKN Sinter Metals Engineering GmbH · DE

Inventors

• Stefan Tiller · Sankt Augustin, DE
• Rainer Schmitt · Meckenheim, DE
• Nils Bornemann · Bonn, DE

Key dates

• Filing date: Mar 14, 2018
• Grant date: May 3, 2022
• Expiry date: Jul 18, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2003/031
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for producing a green compact uses a pressing tool including a die, a first punch to be displaced in an axial direction, a second punch to be displaced in a radial direction through a channel in the die and a receptacle having a filling opening. The method includes locating the second punch before or during filling of a powdery material into the receptacle so as to be outwardly offset in the radial direction relative to an inner peripheral surface, filling the powdery material into the receptacle, and moving at least the first punch and the second punch and compressing the material in the receptacle, with the second punch being moved in the radial direction toward the receptacle only so far that it is disposed flush with a region of the inner peripheral surface. A pressing tool, a green compact and a sintered part are also provided.