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From: vestal@SRC.Honeywell.COM (Steve Vestal)
Newsgroups: trial.rec.metalworking
Subject: Re: Foundry Problems
Message-ID: <1991May7.220158.3551@src.honeywell.com>
Date: 7 May 91 22:01:58 GMT
References: <1991May06.152219.16752@ddsw1.MCS.COM> <dqG=un$1@cs.psu.edu>
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In-Reply-To: okunewck@psuvax1.cs.psu.edu's message of 7 May 91 21:22:44 GMT
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The fact that a thin saucer moulds OK in all three, but a think saucer
doesn't, makes me wonder about whether it has something to do with cooling
before the flow makes it everywhere.  Some other things you might worry about:

1) do you have numerous or large enough risers to provide reserve fluid as
   the cast cools?
2) if you are sand casting, is your sand dry enough, or your melt not
   too hot, so that you don't get steam bubbles?