Abstract: A method to produce cast pieces with optimum mechanical properties having through-openings with minimal outlay in terms of equipment. A casting mold in which at least one casting core is used. A through-channel leading through the through-opening of the cast piece is formed by burning the binder in the molding material out of the casting core representing the through-opening by means of the heat input into the casting mold when pouring the molten metal into the casting mold, or by mechanically destroying, at least in part, the respective casting core representing the through-opening and the regions of the casting mold arranged in the extension of the casting core.

Abstract: A method for the casting of cast parts from an iron melt forming vermicular or spheroidal graphite, includes casting iron melt into a casting mold, which comprises at least one casting mold part, which is formed from a mold material, which is mixed from a sand-type basic material and an organic binder, and then gassed with a gas containing sulphur in order to harden the binder, such that a mold part of stable form is obtained. The method provides embodiments in which molds produced in accordance with the SO2 process enable the risk of occurrence of local microstructure degeneration in the cast part to be reduced to a minimum. This is achieved in that, after the hardening of the mold part and before the casting, at least one of the surfaces, which comes into contact with the iron melt, is provided with a coating containing a non-volatile sulphide former.