mixing of molding material, methods for producing melt molds or cores, and for melting aluminum, mold or core, and use of barium sulfate.

摘要

The invention relates to molding material mixtures containing barium sulfate in combination with refractory basic molding materials and a waterglass-based binder system for producing casting molds and cores for the foundry industry in order to obtain cast pieces, in particular aluminum ones, which have an improved cast surface.