process for the construction of molds and cores layer by layer having a liquid glass binder and a liquid glass binder

摘要

The object of the present invention is a binder containing liquid glass and further containing a phosphate or a borate or both. Another object of the present invention is a process for the construction of molds and cores layer by layer comprising a mixture of components comprised at least of fireproof mold base material and the binder. For layer-by-layer production of molds and cores in a 3d print, the fireproof base molding material is applied layer by layer and is selectively printed with the layer by layer binder so that a corresponding body is constructed. to the molds or cores, the molds or cores being released upon removal of the unbound building material mixture.