FOUNDRY MOULDS AND CORES

摘要

Foundry moulds or cores are made by a method comprising mixing a granular refractory material with a potassium alkali phenol-formaldehyde resin binder solution, forming the mixture and curing the formed mixture by gassing with a 1-3C alkyl formate. Cure by gassing with a formate, particularly methyl formate, enables rapid and efficient production of foundry moulds or cores. The formates used have relatively low toxicity.