Patent ID: 7832458

Claim:
A method for producing a casting mold from a composite mold material for foundry purposes that is composed of different kinds of mold materials that are heat-resistant for the casting of metals and that differ in substantive composition or have different contents of organic or inorganic binders, the method comprising the following steps: forming a hard molded body comprised of a block of a solid mold material A; encasing the molded body with a free-flowing chemically bonded foundry mold material B; hardening mold material B to form a block-shaped composite mold material block consisting of said block of said solid mold material A and said hardened mold material B; machining said block-shaped composite mold material block after said step of hardening, with a cutting method selected from milling, boring, turning, or grinding, using CAD data, to introduce a mold cavity into the molded body formed from mold material A, and to introduce an inflow system and a feed system into a part of the mold material block consisting of the foundry mold material B, using CAD data.