From: Greg Pettengill (email@example.com)
Date: Mon Feb 24 2003 - 15:35:37 EET
Polyurethane is a thermoset material and will not melt like a thermoplastic
I would suggest that you use a wax, perhaps a microcrystalline foundry wax
like Victory Brown, and melt out the core in a hot water bath or in an
Cote' Art & Engineering
----- Original Message -----
From: "reza moini" <firstname.lastname@example.org>
Sent: Monday, February 24, 2003 3:04 AM
Subject: Lost core
> Dear List
> I want to produce 10 prototype of a duct that its
> material is rubber-like.I have built its silicon mold.
> also I have built a mold for its core by SLS machine
> (from PA).I want to use PU foams to produce cores.Do
> you know any foams that is a good choice for me?It
> must be easily removed from part.
> Do you have any alternates or suggestions or comments.
> Thanks in Advance
> REZA MOEINI
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