Robert W. Moore on mon 23 feb 98
[1]] I realize that this may be an inappropriate forum for this question,
but I have not not run into a more appropriate interest group and [2} my
primary interest at the moment is hand building in clay. However, I am
curious about bronze casting from clay models. Any books or courses that
you could recommend?
Mary Hays on tue 24 feb 98
Robert, go to the local library and look up the lost wax process. You need to
make a rubber latex mold of your piece, pour wax into it.
There is lots of info on it. Good Luck! Mary Hays jhaysbsmo@aol.com
Marcia Selsor on tue 24 feb 98
Bronze casting from clay involves making a plaster or moulage mold, and
pouring wax into the final plaster mold. Then building up a ceramic shell
aroung the wax and burning it out. You can do multiples this was.
Standard investment is a one-shot deal. We do both in Billings.
Marcia in Montana
Robert W. Moore wrote:
>
> ----------------------------Original message----------------------------
> [1]] I realize that this may be an inappropriate forum for this question,
> but I have not not run into a more appropriate interest group and [2} my
> primary interest at the moment is hand building in clay. However, I am
> curious about bronze casting from clay models. Any books or courses that
> you could recommend?
John H. Rodgers on wed 25 feb 98
-- [ From: John H. Rodgers * EMC.Ver #2.5.02 ] --
Robert,
There are are numerous books on this subject, and the work is in the realm
of lost wax casting.
You need to make a rubber mold of the model and in the rubber mold pour
melted casting wax(not parafin - its hard to work with). Some use latex for
the mold, but I don't because I don't like the shrinkage of latex. There are
better, more durable rubber compounds on the market. The rubber mold will
allow you to make as many wax models as you need to get you through the
process. You will have some failures along the way, that gives you some
protection against loss of the original.
Typically the wax cast has investment plaster poured over it to make a mold.
.. When it sets, the investment mold is heated to melt out the wax. Then it
is heated some more to approact the temperature of the metal to be cast. The
hot metal is poured into the hot mold, and when the metal has cooled to a
solid again it is plunged in cold water. The hot plaster will explode under
water freeing the casting. After removing the newly cast piece it will need
to be cleaned up, buffed, patinaed, etc. When done, you begin the process
again with a wax model.
Luck
John Rodgers
Jeff Lawrence on thu 26 feb 98
Robert was asking about bronze casting...
Robert, you might call Lindsay's Publications in Kankakee IL at
815-935-5353. Their catalog has a wealth of interesting books on metal
working of all kinds. You'll see pamplets on DIY equipment, from charcoal
briquet fired forges for casting iron in your back yard to scale models of
locomotive engines from the turn of the century. One series allow you to
bootstrap an entire machine shop starting with rubbing two sticks together.
Great lithographs of muscular working joes wearing handlebar mustaches and
bowler hats at no extra charge.
Lindsay's line is reprinting old books on which the copyright has expired,
so you run no risk of up-to-the-minute data.
Jeff
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