METHOD AND APPARATUS FOR PRODUCING NICKEL SHELL MOLDS

摘要

A method and apparatus for producing a nickel shell mold by nickel vapour deposition onto a mandrel in a deposition chamber is disclosed. A nickel shell mold assembly is produced having a liquid and vapour-tight cavity co-extensive with the mandrel for receiving a heating fluid, preferably a liquid such as oil for flood heating of the mandrel to a uniform surface temperature.