[Jewelry making - Article 00116] - Re: [Orchid] The best angle for sprueing

[Volpe, Tino]

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    Ok I have to chime in on this one because casting precious metals
    has been the story of my miserable life for the last 15 years. What
    you really have to look at is the location and shape of the gate on
    your piece. I see pieces gated for every reason under the sun EXCEPT
    for the purpose of getting a good casting. We gate for ease of
    cleaning, we gate for ease of mold cutting, we gate to make it look
    nice ( the gate that is, I'm not kidding). The last thing on anyone's
    mind is getting a solid casting. Make the gates round!!!  Don't pinch
    the ends!!!  Fillet the joints!!! Gate to the thickest part of the
    Piece!!! Use multiple gates if you have to. Better to make a good
    casting that hard to finish then a bad casting that's easy to finish.
     I've been fighting this mind set for years. Do all the above and you
    can cast with the mold at room temperature and get fill. I've done
    it.  Hey, there's a reason why the water pipes in our houses are
    round and not square or flat!  Ok, off the soap box. 

Tino Volpe
Metallurgist, Technical Manager
Tiffany & Co.
300 Maple Ridge Drive
Cumberland, RI 02864-8707
401-288-0124


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