Method for preheating molds for aluminum castings

摘要

Aluminum parts are cast in a plurality of permanent-type or semi-permanent-type molds, the molds being preheated to a predetermined temperature before starting the casting operation, and being provided with temperature sensors and a logic device which produces a blocking signal for the casting system when the temperature of the mold is below a predetermined casting temperature in order to minimize the number of scrap castings due to uneven or low mold temperature. Hot gases are created and flowed through the interior of the mold, by a burner and hood shaped to fit over at least some mold openings.