At 02:30 23 March 2009, Steve Leonard wrote:
For a single pour mold, you can even carve it out of wood, like a 2 by 4.

It will smoke, burn the wood (you can blow out the fire), but it will
hold
up for a single lead weight making. How heavy a weight are you trying
to
make? And about how big?

You could then make the glass cup from the lead part, or even from a
block
of foam that you cut to about the same shape.

A friend once got in trouble with his wife by using one of her frying
pans
to make lead disks for putting in the seat pan of our old club two
place!

One thing to watch out for (may not be this way with the gypsm stuff
that
Paul mentioned), but anything that used water in its making, can trap
water inside. Put molten lead in it, and it can be a bad thing.

Happy slug making!

Steve Leonard
Lead has a melting temp of about 500 degrees C commercial moulds for
casting batches are usually cast iron as are some pans.
If you make a mould using sheet steel this would then encapsulate the lead
after pouring and prevent the soft lead from deforming under pressure from
the fastening bolts.