A method for the production of cores and molds in foundry.

摘要

A method for the production of cores and molds in foundry starting from molding mixtures based on a foundry sand and a polyisocianate compound or a prepelymer containing free isocyanate groups, which mixture is then hardened through contact with water both liquid and as steam. The process allows the production of cores and moulds with good technologic characteristics and does not involve any pollution problem for the work environment.