Foundry processes and compositions

US4111253A · kind A · utility

Assignee

• The White Sea & Baltic Company Limited · GB

Inventors

• David Epstein · Sha Tin, CN
• John Bugg · London, GB

Key dates

• Filing date: Jan 24, 1977
• Grant date: Sep 5, 1978
• Expiry date: Jan 24, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22C1/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Improved method for making foundry moulds and cores involves use of composition having foamed aqueous phase and comprising foundry sand, resin, curing agent for resin, silane, a low amount of water and a foaming agent such that the foam persists until the composition sets. Preferred features reside in having a total water content of from about 1% to about 2%, in using sodium lauryl ether sulphate as the foaming agent and in the order of mixing the ingredients.