Try 80 to 90 psi, worked well on clear castings.
______________________________ Reply Separator _________________________________
Subject: Vacuum Casting Pressure?
Author: "Tim Lovett" <fineform@pnc.com.au> at INTERNET
Date: 3/24/2000 1:07 AM
I want to pick your brains...
If I was to make my own vacuum casting machine, what sort of pressure could I
get away with? (I have seen 10mBar in a product spec but I don't know if this is
an overkill or barely adequate!)
Assuming I am casting from RP model to silicone tooling to PUR, epoxy, etc
parts.
I am looking at doing it as part of an educational RP site.
Tell me anything - In whatever units - Torr, kPa, mBar, even INCHES Hg or PSI !
Is vapour pressure of resins a problem. If so, where can I find info on VP's for
vacuum casting resins and materials?
Tim Lovett
Sydney Australia
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<DIV><FONT size=2>I want to pick your brains...</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>If I was to make my own vacuum casting machine, what sort of
pressure could I get away with? (I have seen 10mBar in a product spec but I
don't know if this is an overkill or barely adequate!)</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Assuming I am casting from RP model to silicone
tooling</FONT> <FONT size=2>to PUR, epoxy, etc parts.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I am looking at doing it as part of an educational RP
site.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Tell me anything - In whatever units - Torr, kPa, mBar, even
INCHES Hg or PSI !</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Is vapour pressure of resins a problem. If so, where can I
find info on VP's for vacuum casting resins and materials? </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Tim Lovett</FONT></DIV>
<DIV><FONT size=2>Sydney Australia</FONT></DIV>
<DIV> </DIV></BODY></HTML>
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