Patent DE-102010011003-A1 (DE)
Title: Producing casting parts consisting of a recasting- and a core part, comprises arranging the core part inside a cavity of a casting tool by movably mounted positioning elements for bearing safety during the production of the casting parts
Inventor: SCHNEIDER WILLI DR
IPC: B22C21/14
Filed: 2010-03-11
Abstract: The method for producing casting parts consisting of recasting part and a core part (8), comprises arranging the core part inside a cavity (7) of a casting tool (1), and keeping the core part inside the cavity by movably mounted positioning elements (15) for bearing safety during the production of the casting parts, where one of the positioning elements are moved-out from its core part-supporting position into the cavity with the not yet completely solidified casting part. A movably mounted secondary compression element (22) is moved into the cavity up to a distance above the core part. The method for producing casting parts consisting of recasting part and a core part (8), comprises arranging the core part inside a cavity (7) of a casting tool (1), and keeping the core part inside the cavity by movably mounted positioning elements (15) for bearing safety during the production of the casting parts, where one of the positioning elements are moved-out from its core part-supporting position into the cavity with the not yet completely solidified casting part. A movably mounted secondary compression element (22), which is adjacent to the one of the positioning element and is simultaneous or subsequent to the outward movement, is moved into the cavity up to a distance above the core part, so that the melt volume lying above the secondary compression element is displaced into the cavity by its movement and into the volume released from the moved-back or moving-back positioning element through its lesser distance to the assigned positioning element. The positioning element is a positioning pin and the secondary compression element is a secondary compression pin, where the positioning pin and the secondary compression pin are displaced axis-parallel to each other with respect to the core part in a controlled manner. The outwardly moving all existing positioning elements are simultaneously introduced with the inwardly moving all second compression elements. The positioning elements are moved out from the cavity until they are in flush-mounted position with a contour of mold halves forming the cavity and the secondary compression elements are moved from the flush-mounted position into the cavity up to the distance above the core part. The core part is held as reinforcing element on both sides of the aligned positioning pins but the secondary compression pin is assigned only to the positioning pin, where the secondary compression pin displaces a molten casting metal into the reinforcing element by a passage opening lying before it and into the volume released from the positioning pin at the rear side of the reinforcing element during the simultaneous outward movement of the positioning pins. An independent claim is included for a casting tool for producing casting parts consisting of recasting part and a core part.