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.
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:
and Lens Dies
and Worm Dies
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.
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.
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.