Patent ID: 6516865
Filing Date: 2003-02-11
Classification: B22C,B22D,Y10S,Y10T

Abstract:
A method for producing a hollow-cast component, said hollow-cast component including a surface, at least one hollow space, at least one core opening, and at least one recess accessible from the outside of said component, a penetration of said at least one recess forming a closed line with said surface of said component, said at least one recess covering said at least one core opening within said component in its entirety, comprising the steps of:casting said component with a cast mold and a casting core to form said hollow space, said casting core being fixed during said casting step by core supports in said cast mold; forming said at least one recess in said component which at least one recess covers at least one of said at least one core openings; removing said casting core after said casting step through said core openings created by said core supports; closing said core openings with a closure piece after said step of removing said casting core by inserting said closure piece from the outside of said component into said at least one recess, said closure piece having a size selected from the group consisting of smaller than, the same as, or larger than that of said at least one recess; fixing said closure piece in said at least one recess.