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Once all the molds are filled and the ladle emptied, the cupola is dumped. There's a swing-away panel at the base, which is knocked free,
and then the sand floor of the chanber is chipped out with a pickaxe. The white-hot coke, slag, and liquid iron falls out the bottom,
where it can be quenched, and in some cases reused. The refractory lining of the cupola has to be replaced- or at least repaired-
every couple of firings. This isn't a process you just decide to go do on a whim when you need a special part real quick.





All text, photos and graphics Copyright 1998- 2015, Doc's Machine & Airsmith Services. All Rights Reserved.
Information contained in these pages is for reference and entertainment purposes only.  Our methods are not always the best,
quickest, safest, or even the correct ones. It's up to you to know how to use your own machines and tools.
Keep your fingers away from the spinny blades o' death and you should be all right.