Core or foundry sand coated and/or mixed with water glass with a water content in the range of >= approximately 0.25% by weight to approximately 0.9% by weight

摘要

A core or foundry sand that can be used for the production of cores and casting molds for the casting of molten metals includes a basic molding material, a layer of an adhesive agent coating the basic molding material, and a layer of water glass lying over the adhesive agent layer. The core or foundry sand has a water content in the range of @ approximately 0.25% by weight to approximately 0.9% by weight in relation to the overall weight of the core or foundry sand.