[TheForge] one time use crusible

[don schad]

On Fri, Jun 6, 2008 at 12:50 PM, David E. Smucker
<davesmucker at hotmail.com> wrote:
> Weld a bottom to a short section of pipe, and the line with clay, one of the
> fire clays is best but even local clay will work.  Let the clay air dry.
> Then and this is very important -- bake the whole thing in your oven for a
> number of hours.  You want the clay bone dry (no water in molten metal).

I don't think that you necessarily need the clay in the melting pot.
Probably just weld the bottom on the tube and toss the stuff in there.

I used to use stainless steel cook-ware (like bowls, etc) to melt
Aluminum because it was easy to get and pretty cheap.  These were
fairly thin walled, but they would work a number of times until the
crumbled.   I think your Cu will require higher temps, so probably a
thicker wall steel would be better.

Also, I don't about about bronze, but w/ casting Al you want to bubble
an inert gas through the mixture to keep He bubbles from forming.

don