From: Greg Pettengill (gpetteng@bellsouth.net)
Date: Mon Feb 24 2003 - 15:35:37 EET
Hi Reza,
Polyurethane is a thermoset material and will not melt like a thermoplastic
material.
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
autoclave.
Best Regards
Greg Pettengill
Cote' Art & Engineering
321-269-7587
----- Original Message -----
From: "reza moini" <rmoini190@yahoo.com>
To: <rp-ml@rapid.lpt.fi>
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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