Abstract: An apparatus for casting molded parts includes a casting mold having a lower core, an upper core and pushing elements, which, in a first end position, are in contact so as to form a hollow space into which a liquid casting mass can be introduced during a casting process. The upper core, which rests against the inside of the molded part is displaceable in an insertion direction in order to remove the molded part comprising a hardened casting mass. The upper core has a jacket surface and a bore that extends at a predetermined angle with respect to the insertion direction. An actuating element is displaceable in the insertion direction. An undercut pushing element is coupled to the actuating element via a crossbeam and has a front end that is movable between first and second end positions.