I just acquired several blocks of machineable/drillable
graphite that I wish to turn into ingot molds. Frankly, I don't
have a clue what I am doing...lol.
Hi Edward; I used to make and use graphite molds for pewter, and I've
helped my father make glassblowers tools from it. It's very easy to
machine (self lubricating too). And yes, it's messy. You can use
just about any file, drill, saw, whether designed for metal or wood.
I'd get a shop vac, turn it on and put the hose end right up to where
the tool is cutting. I'd wear a dust mask too, and ear plugs to
block the noise of the vac. Graphite is quite a heat sink, I've not
tried it for pouring gold or silver into, but I can't see why it
wouldn't work. You could always pre-heat it if the metal were
chilling before it filled the mold.
David L. Huffman