Study on Separation of Electroformed Shell from a Mold

Nickel-electroforming is used for obtaining a nickel-replica by means of electrodepositing nickel on a mold.In recent years, electroforming technique has made great progress, yet there remained some difficult problems to be solved.Of these problems, it is most essential for electroforming engineers to find out suitable methods for separating the electroformed shell from mold.By this study, it was revealed that the high tensile stress, generated in the electroformed nickel, might oppose to the separation of the electroformed shell from mold.It was also observed that, if the electroformed Nickel has extremely low tensile stress or compressive stress, the electroformed shell might easily be separated from mold.