34f08f34_rials_patent_application_class__Description
20130199749 08-08-2013 [Description] 
METHOD FOR MANUFACTURING MONOLITHIC HOLLOW BODIES BY MEANS OF A CASTING OR INJECTION MOULDING PROCESS - A method for manufacturing a monolithic hollow body by means of a casting or injection moulding process, the manufacturing method contemplating the steps of: producing at least one lost ceramic core that reproduces the shape of at least one internal cavity of the hollow body, introducing the ceramic core inside a first mould that reproduces in negative the external shape of the hollow body, feeding a molten material inside the first mould by means of a casting or injection moulding process, letting the material inside the first mould solidify, extracting the hollow body from the first mould, and destroying and removing the ceramic core located inside the hollow body.
Utilizing particular mold materials patent application class