Method and device for the production of casting molds out of sand containing a binder

US4182395A · kind A · utility

Inventor

• Eugen Buhler · Thannhausen, DE

Key dates

• Filing date: Nov 28, 1977
• Grant date: Jan 8, 1980
• Expiry date: Nov 28, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22C15/23
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Casting molds from binder-containing molding sand manufactured by improved vacuum injection, achieved by employing an injection grate with injection slots of a minimum width of at least 50 mm, a filterless connection between the mold container, the vacuum container and a vacuum container having a volume at least 20 times the volume of the mold container, evacuation of the vacuum container by a liquid seal pump and a venturi pipe effect in the sand chamber prior to injection of the sand.