Can anyone help me with casting silver/gold at home? I do not
have a casting machine yet, and I do not wish to buy one, since
they are very expensive for the hobby goldsmith, I was thinking
about making one home. Do you think it would be possible? How?
I think your best bet is to call around to rock shops and find a
used setup, even a very used setup. You’ll need a centrifugal
machine (as you will find one more cheaply than vacuum), a burn
out oven, and some accessories (flasks, rubber bases, tongs to
remove the flask from the oven etc). You can build an inexpensive
vacuum pump from a refrigerator compressor, and using the hot
water investing technique get good castings.
I found a kerr standard casting machine, and loads of
accessories for $200. I think you could too, maybe even for less.
I bought a used burn out oven for $150, and a used vacuum pump
for $100, but it needed rebuilding. There you go.