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The reproductive ability offered by electroforming provides a facsimile on size and surface finish which can be used to advantage for many types of injection mould dies.

A Rotoplas electroformed die consists of a nickel deposit to 48-50 Rc. plated to a thickness of approximately 5mm, from a metallic or non-metallic master. In some applications these nickel dies are mounted into hardened steel frames, but those requiring a greater thickness can be backed with additional nickel to a thickness of 20mm or more. There are numerous applications, but the following will give an indication:

Reflex and Lens Dies - see separate Link.

Gear and Worm Dies - see separate Link.

Figure Dies - Mouldings requiring split dies with undulating parting faces are a particularly good application as the matching faces are automatically created at the master stage. We are able to offer a complete model making service including original white metal figures and necessary resin patterns.

Pen Barrels and Spline Forms - Long slender forms can be machined using modern machining techniques, but to achieve an acceptable moulding finish is tedious and at times impossible where there is inaccessible detail. Highly polished individual stainless steel masters can be manufactured and Electroformed a number of times to produce cavities to close tolerances. For multiple dies of less exacting requirements we can produce a prototype die and cast resin masters.

Surface Finishes - Various decorative finishes such as leather, linen and like surfaces, are faithfully copied. Side wall design as used on some types of closures is yet a further example where Electroforming overcomes a recognised tooling problem.