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RE: [PSUBS-MAILIST] Brass vs. Bronze
Hi Jay,
I followed the link to Doug's website (www.submarineboat.com) and found he
has a lot of info just as you've described them. I haven't checked out the
other site yet, but I will.
Jon
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Jay K.
Jeffries
Sent: Tuesday, April 11, 2006 12:48 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Brass vs. Bronze
Jon,
I apologize for not going into greater depth on styro models as I'm at work
and pressed for time. You model in styrofoam the final object you want.
Molding sprues and vents are added in styrofoam also. This model is covered
with a fine slurry of refractory material (believe I have used the proper
term, don't have my casting references in front of me...similar to a ceramic
slip). The covered model is then place in a mold box and packed with
molding sand (a combination of oil and fine sand that hold it shape very
well) and tamped down until solidly packed. The mold is prewarmed to assist
in even metal casting metal cooling for uniform grain structure and
strength. Molten metal (I know bronze and iron both work from personal
experience, haven't attempted aluminum) is then poured into the mold and a
fine casting results. You have to be careful of no moisture in any mold as
you can get explosive results otherwise with hot metal everywhere. Major
car engine builders use this process along with other industries that
require an intrique casting. While you may not find this method referenced
in the URLs suggested by others (I have previous found info on the web as to
how to use styro for casting models), the methodology is explained in
technical references and can be accomplished using a backyard force-blown,
charcoal furnace for melting your metals.
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
-----Original Message-----
>From: PSUBS <jon@psubs.org>
>Sent: Apr 11, 2006 10:12 AM
>To: personal_submersibles@psubs.org
>Subject: RE: [PSUBS-MAILIST] Brass vs. Bronze
>
>Jay,
>
>Wow, I'm surprised the styrofoam lasts long enough to allow the metal to
>solidify.
>
>Jon
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