Moulding mixture for producing casting moulds for metalworking

US7770629B2 · kind B2 · utility

Assignee

• AS Lungen GmbH · DE

Inventors

• Gunter Weicker · Solingen, DE
• Diether Koch · Mettmann, DE
• Jens Müller · Haan, DE
• Udo Skerdi · Bendorf, DE
• Henning Rehse · Wermelskirchen, DE
• Anton Gienic · Hilden, DE
• Reinhard Stötzel · Borken, DE
• Thomas Dünnwald

Key dates

• Filing date: Sep 2, 2005
• Grant date: Aug 10, 2010
• Expiry date: Sep 9, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22C1/188
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a moulding mixture for producing casting moulds for metalworking, a process for producing casting moulds, casting moulds obtained by the process and also their use. To produce the casting moulds, a refractory mould raw material and a binder based on water glass are used. A proportion of a particulate metal oxide selected from the group consisting of silicon dioxide, aluminium oxide, titanium oxide and zinc oxide is added to the binder. Particular preference is given to using synthetic amorphous silicon dioxide as metal oxide.