| 20110220314 | MOLDING MATERIAL MIXTURE AND FEEDER FOR CASTING ALUMINUM - The invention relates to an exothermic molding material mixture for producing feeders for casting aluminum, comprising at least: - a fireproof base molding material; - a binder; - a proportion of an oxidizable metal of from 5 to 18% by weight relative to the molding material mixture; - an oxidizing agent at a proportion of 10 to 50% by weight relative to the quantity of oxidizing agent required for completely oxidizing the oxidizable metal; and - an igniter for oxidizing the oxidizable metal at a proportion of 15 to 50% by weight relative to the quantity of the oxidizable metal. A feeder made of the exothermic molding material mixture ignites reliably, even at low temperatures, and is characterized by low heat emission. It is therefore particularly suitable for casting aluminum. | 09-15-2011 |
