Patent ID: 6676825
Filing Date: 2004-01-13
Classification: B22D,B23H

Abstract:
A method of making an article of manufacture having a cavity therein comprisingproviding a mold having a sacrificial core, at least a portion of said sacrificial core being made from an electrolytically dissolvable metal, filling said mold with a hardenable flowable material, hardening said flowable material in said mold, whereby a solid article of manufacture is formed having said sacrificial core embedded therein, removing said solid article of manufacture from said mold, providing a counterelectrode, interposing an electrolyte between said electrolytically dissolvable metal and said counterelectrode, passing an electric current between said electrolytically dissolvable metal and said counterelectrode wherein said electrolytically dissolvable metal is maintained predominantly anodic with respect to said counterelectrode, whereby at least a portion of said electrolytically dissolvable metal is dissolved, and removing any undissolved portion of said sacrificial core from said cavity.