'Filler' to be used in piece to be cast?

I have been working on a sterling silver piece that I need to have a
mold made of for casting and I am concerned that one tiny section of
the metal where there is a fold is extremely thin - I'm pretty sure
this will pose a problem when cast. It's in a really awkward spot and
attempting to solder metal in to resolve the problem could potentially
destroy the piece.

I'm wondering if anyone can recommend some sort of 'filler' substance
that doesn't require excessive heating and would survive the process
of having a rubber mold made.

Thanks!

I'm wondering if anyone can recommend some sort of 'filler' substance
that doesn't require excessive heating and would survive the process
of having a rubber mold made.

Is it in an area where you could trim/grind some of the mold away after
vulcanizing?

While looking for a castable, machinable plastic which could be used
for vulcanizied models one thing I tried was J-B Weld. It seems to be
a metal filled epoxy paste, the manufacturer claims a 500° F max
temperature. It had poor casting qualities and tended to be rough on
cutting tools BUT did survive vulcanizing very well. I would think
that it might work well as a patching filler but I haven't actually
tried it in that application. If it doesn't work out, annealling
temperatures (with due concern for ventilation) ought to remove it.

Jeff

Demand Design
Analog & Digital Modeling & Goldsmithing
www.aztec-net.com/~jdemand

On Sun, 08 Aug 2004 14:33:06 GMT, (sparkles) wrote:

I have been working on a sterling silver piece that I need to have a
mold made of for casting and I am concerned that one tiny section of
the metal where there is a fold is extremely thin - I'm pretty sure
this will pose a problem when cast. It's in a really awkward spot and
attempting to solder metal in to resolve the problem could potentially
destroy the piece.

I'm wondering if anyone can recommend some sort of 'filler' substance
that doesn't require excessive heating and would survive the process
of having a rubber mold made.

Thanks!



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sparkles wrote:

I have been working on a sterling silver piece that I need to have a
mold made of for casting and I am concerned that one tiny section of
the metal where there is a fold is extremely thin - I'm pretty sure
this will pose a problem when cast. It's in a really awkward spot and
attempting to solder metal in to resolve the problem could potentially
destroy the piece.
=20
I'm wondering if anyone can recommend some sort of 'filler' substance
that doesn't require excessive heating and would survive the process
of having a rubber mold made.
=20
Thanks!

I recommend to use silikon molds. So You won=B4t have such probs.
http://www.schmuckfabrik.de/g-text.htm#19

Gr=FC=DFe,
Heinrich Butschal

--=20
www.juwelen.online-boerse.org
www.meister-atelier.de
www.schmuckfabrik.de
www.medico.butschal.de