This
is
Step Four:
Making the rubber
model
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Step One:
armature
Step
Two:
modelling
Step
Three:
intermediate
mould-making
Step
Five:
plaster
production
mouldmaking
Step
Six:
slip casting
Step
Seven:
fettling and finishing
Back to
the
Introduction
Making the silicone rubber permanent model, Page One of Two.
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The white rubber mould has been carefully cut open on the break lines and laid into the matching plaster mould parts. The first coat for the rubber model is painted onto the rubber mould. It has been coloured brown to be easy to distinguish. On the plaster I have laid the strengthening leg wires. Several thin coats of rubber are painted on, trying not to let it puddle in the dips or be skimpy over the raised bits. |
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On the left of the picture, the smaller internal segments have been placed onto the starboard big side, with the leg wires in place. The joints have been buttered over with more silicone rubber, this time coloured blue. The port side has the blue "butter" trowelled onto the edges and it is now ready to be laid down over the starboard side. It is almost impossible to get the resin which will make the solid core of this model to flow from the body into the thin tube left in the legs. I can squeeze some in through the feet, which are open, but the wires do ensure the legs are firmly supported. |
The next page is the mould strapped up, ready for the resin core.