I have done this method back in a college art class-we made aluminum
sculptures from foam cut to duplicate our designs, packed em in sand in a box
of some sort, and poured the molten aluminum in on a "sprue" just as
described. I still have my sculpture and my wife hates it. But the method
does work. You could easily make cast parts in this method, machine them or
whatever. We used an "art/craft" foundry back there in upstate New York to
make em when I was at Syracuse studying architecture.

Marc Wiese 20B in something this way comes.....

 
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