Talk Composites - The Forum for Advanced Composites

Post curing of mould made of EG60 epoxy tooling gelcoat

http://www.talkcomposites.com/Topic24263.aspx

By Olivier - 11/15/2017 8:02:21 PM

Hi,

I have a pattern of a rc glider stabiliser made of foam and several layers of IN2, pattern coat primer and pattern coat hi gloss.
I am making an epoxy mould with this pattern and EG60 + FG layers + IN2 + poraver.


I need to know if I should post cure the pattern before making the mould and what is the Tg of pattern coat primer and hi gloss
Or build the mould and post cure it?
Should I post cure the mould with or without the pattern?
I plan to perform a post cure cycle as noted in TDS: :• 24 hours at 25°C• 2 hours at 40°C• 2 hours at 50°C• 2 hours at 60°C

Do I get the same properties if I wait 15 days and no post cure?
For the final CF stabiliser can I post cure the part up to 60C?

Thanks for your support

Kind Regards,
Olivier
By Olivier - 11/25/2017 7:24:45 PM

 
Olivier - 11/17/2017 5:07:37 PM
 
Warren (Staff) - 11/17/2017 4:46:23 PM
S120 is primarily designed as a board sealer, so the surface would already need to be smooth for it to work without using too many layers.  As the surface is already Pattern Coat Primer, you can polish up the Primer and apply release agent directly to it, so no real need for board sealer.

yes but the pattern cast stretch and twists my part

I tried S120 while it is a Wonderfull product it is too brittle to be used on soft foam.
But still solved a part of my issues.
Thanks