Abstract: A method for knocking out a foundry core confined in an internal cavity in a part at the end of a casting operation, in particular a lost-wax casting operation, includes at least a primary chemical knocking-out step. During the primary chemical knowing-out step, the part is subjected to a chemical solution to dissolve the core, in a sealed enclosure. The method further includes a secondary step of knocking out by ultrasounds in water or an aqueous solution contained in an ultrasound tank, during which the part is subjected to ultrasounds to loosen core residues from walls of the cavity.

Abstract: A method for knocking out a foundry core confined in an internal cavity in a part at the end of a casting operation, in particular a lost-wax casting operation, includes at least a primary chemical knocking-out step. During the primary chemical knowing-out step, the part is subjected to a chemical solution to dissolve the core, in a sealed enclosure. The method further includes a secondary step of knocking out by ultrasounds in water or an aqueous solution contained in an ultrasound tank, during which the part is subjected to ultrasounds to loosen core residues from walls of the cavity.