Casting core with crossover bridge

Abstract

A casting core for use in investment casting having at least one gap between two separate core material parts which define separate adjacent cavities in the finished product, wherein the two core material parts are connected by at least one crossover bridge fixing the position of the two core material parts relative to each other, wherein the crossover bridge has a cross section whose wall contour has at least one convex and at least one concave section.

1 . A casting core for use in investment casting comprising:
 at least one gap between two separate core material parts which define separate adjacent cavities in the finished product,   wherein the two core material parts are connected by at least one crossover bridge fixing the position of the two core material parts relative to each other,   wherein the crossover bridge has a cross section whose wall contour has at least one convex and at least one concave section.   
     
     
         2 . The casting core of  claim 1 ,
 wherein the cross section is the cross section perpendicular to the longitudinal extension of the crossover bridge.   
     
     
         3 . The casting core of  claim 1 ,
 wherein the cross section of the crossover bridge does not have an extension which is larger than 20.0 mm.   
     
     
         4 . The casting core of  claim 1 ,
 wherein the wall contour of the cross section has exactly two convex sections and two concave sections.   
     
     
         5 . The casting core of  claim 1 ,
 wherein all of the wall contour of the cross section is curved.   
     
     
         6 . The casting core of  claim 1 ,
 wherein the material of the crossover bridge is different from the material of the two separate core material parts.   
     
     
         7 . The casting core of  claim 1 ,
 wherein the crossover bridge and at least one of the two separate core material parts are made in one piece.   
     
     
         8 . The casting core of  claim 1 ,
 wherein at least one of the two separate core material parts comprises ceramics or are made of ceramics.   
     
     
         9 . The casting core of  claim 1 ,
 wherein the casting core is a casting core for a gas turbine airfoil.   
     
     
         10 . An investment casting product,
 wherein the product is produced by using a casting core according to  claim 1 .