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@Smalls:
I do not have access to a proper 3D CAD system at this time. So sending off a cad design wouldn't be quite that easy.
I'm also working on a few projects at once. One requires a few prototype designs. I really don't think I need the lead time to drawing, submitting, quote, order, and waiting to get something done that I could make an afternoon if I had a furnace setup. If I really need a precision design, I will contact a shop. I'm just not anywhere near that point.
@Auto
I'll keep you in mind when I have questions. :-)
I'm trying to go through and make some estimates of what I need versus what I can build versus what I can/should buy. (sometime wasting away a few weekends to get something started isn't worth it if it can be done in a day!).
What kind of setup do you have at the school? Do you have a small brick open? Open top furnace? I would assume you have gas being a school teacher and not a back yard master of trade :-)
-What type of crucibles do you use?
-Do you have re-line the furnace on an set intervals?
-Is it under service contract?
-With LFC, what type of sand do you pack around the foam mold? They did this in my high school, but I believe it was just some type of green sand.
-Where do you get the metal supply? Ingots?
And I'm considering using a charcoal style furnace for the first setup. Simple, cheap, pretty controllable (blower motors are the main source of intense heat).
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