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Getting ready to cast a small
winch. The parts are made and applied to a backing. A dam to
hold the RTV is on the right. |
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Another view. Before this was
poured, a winch control and fire axe was added to the parts
for casting.
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The dam is glued in place. Once
set, the RTV is mixed with the catalyst. Mix again and
again. Then mix some more. A little RTV is poured into the
mold. Using a disposable brush, spread in and around the
parts. Try to brush out any air pockets that may have
formed and "pick up" all of the detail.
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After brushing around to get all
of the detail from the "master" or original parts, slowly pour
in the RTV to fill up the mold. |
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When the RTV has covered all of
the parts, and then some, gently tap the filled mold on a
hard surface. This will help release trapped air bubbles
and allow them to rise to the surface. If the RTV is
properly mixed, the solidified rubber can be pulled away
from the master in 24 hours.
(There was enough RTV left over
to fill up another mold...this one is for step rails...photo
etched brass will be used for steps)
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Visit
the Alumilite Page to order supplies or for more information. |
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Suppliers of Scale Fittings |
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BlueJacket Ship Crafters |
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Robbe |
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Many more suppliers on the
Links Page |
