Method for producing a moulded body from foamed metal

US6733722B2 · kind B2 · utility

Assignee

• Neue Materialien Fuerth GmbH · DE

Inventors

• Robert Singer · Erlangen, DE
• Carolin Korner · Feucht, DE

Key dates

• Filing date: May 13, 2002
• Grant date: May 11, 2004
• Expiry date: May 13, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing a shaped body from metal foam, including the following steps:a) preparing a first powder, which is formed from the metal, and a second powder, which is formed from a blowing agent,b) feeding the first and second powders to an extrusion device, the first and second powders being in a non-compact form,c) conveying a powder mixture, which is formed from the first and second powders, in the extrusion device towards a casting mold, and, while conveying, at least partially melting the powder mixture to form an at least partially molten powder mixture and applying a pressure to the at least partially molten powder mixture, this pressure being greater than a gas pressure produced by the blowing agent,d) injecting the at least partially molten powder mixture into the casting mold, ande) relieving the pressure in the mold to a level that is lower than the gas pressure, so that the casting mold is completely filled with a metal foam that forms.