Molding body for the production of cavities

Abstract

A molding body for the production of a cavity in a metal casting such as a piston of an internal combustion engine, the molding body being composed of calcium silicate fibers held together in a solid form by a soluble binding agent.

What is claimed is:  
     
         1 . A molding body for the production of a cavity in a metal casting, said molding body comprising calcium silicate fibers held together in a solid form by a soluble binding agent.  
     
     
         2 . The molding body of  claim 1 , wherein said binding agent is an inorganic binding agent soluble in water.  
     
     
         3 . The molding body of  claim 2 , further comprising aluminum oxide mixed with the calcium silicate fibers.  
     
     
         4 . The molding body of  claim 3 , wherein the inorganic binding agent is waterglass, the calcium silicate fibers being present in an amount of between 19.5 and 26.5% by weight, and the aluminum oxide being present in an amount of between 50 and 58% by weight.  
     
     
         5 . The molding body of  claim 5 , wherein the molding body is used for producing a cavity in a structural component of an internal combustion engine.  
     
     
         6 . The molding body of  claim 4 , wherein said structural component is a piston.