Removal of sacrificial cores by electrochemical machining

摘要

A sacrificial core (304) defining a cavity in a metallic or non-metallic shaped article of manufacture, e.g., a casting (302), is made from a metal that can be electrolytically dissolved. The sacrificial core (304) is removed from the article (302) by electrochemical machining. The sacrificial core (304) may be a hollow shell (306) incorporating an integral electrode (308) within the shell and electrically insulated from the shell.