I wanted to create a way to make my own refractory crucibles, so I devised a mold.
So its about time I got started...heres the base for the mold pattern:
Its a double walled drinking glass - $3 at the local big box retailer. As it stands its only about 3mm thick, far too thin for a crucible, so I need to thicken it up, but how can I do it quickly and uniformly? Wrap rope around it:
Now its closer to 9mm at the thinnest, I also need to beef up the bottom, so hunk of 3/8 plywood wil be added and shaped to fit. I will coat all this with some drywall mud, and then hit it with several coats of high gloss enamel so that the mother mold will release from this pattern down the road. Im hoping to end up with a bilge shape at about 1/2" thick for durability.
and for fun, my new tongs:
holding my old crucible:
More pics to come later
p.s. And here is my first shot at DIY refractory crucibles...crude, but effective...