Re:Andy Scott:Re: Air Bubbles in castings

From: markschanze (
Date: Fri Jul 31 1998 - 07:42:33 EEST

Andy Scott wrote:
I understand that the mold will expand with temperature as well. So there
an optimum temperature that will yield the correct dimensions. Might take
a few test tries to find it though.
Andy Scott LMCO
Try this. Mix the same amount of urethane that would be used in the part.
Measure the exothermic peak. Cure the silicone mold at that temperature.
Heat the mold to this temperature when casting the urethane part.
Mark Schanze
Molding Technologies Manager
CIVCO Medical Instruments
319 656 4447

For more information about the rp-ml, see

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