Foundry processes and compositions

Details Foundry processes and compositions Foundry processes and compositions

B - Operations, Transporting

22

C

22/158

B22C 1/22 (2006.01) B22C 1/20 (2006.01) C08J 9/30 (2006.01)

Patent

CA 1112838

ABSTRACT OF THE DISCLOSURE A foundry mould or core is made by forming a fluid mix of sand and a foamed aqueous phase containing binder and curing agent, pouring this into a mould or core box and allowing it to set. The foam is stable and does not break before setting starts. In one embodiment the total amount of water in the mix is 0.9 to 1.5% while in another embodiment a fluid mix of the sand and the binder is formed and the curing agent is then added to this.

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