Binder system, mold material mixture comprising the binder system and method for manufacturing molds or cores using the mold material mixture

Abstract

The present invention discloses a mold material mixture for the manufacture of molds and cores for metal processing. Said mold material mixture comprises a refractory based mold material and a binder system. Said binder system comprises a liquid portion and a solid portion. Said liquid portion comprises an inorganic binder and water. The inorganic binder is a mixture of sodium silicate and potassium silicate. Said solid portion comprises particulate amorphous SiO₂, said particulate amorphous SiO₂ having a BET specific surface area of

Images