Quote:
Originally Posted by Composite Steve
Hi Vinny,
Sounds like you've worked with composites before. Two of the moulds were made using polyester resin and 10+ layers of fiberglass cloth. It's very strong and fully cured so I hope it's not distorting. I'll check them against the original plug.
I've switched to epoxy resin since so there's no need for MKEP catalyst or any issues related to it.
I give it a few days for the parts to cure before removing it from the moulds. I'll see if it needs to set in the mould for longer.
Thanks for the tips 
Steve
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25+ years with composites and still refining the craft.
You mentioned cure time on the mold. Most of us give up to 2-3 weeks for post cure WITH the assistance of heat....whether the solar heat or heat-lamps or heat blankets.
Even Epoxy manufacturers will require it if you ask them. Its a necessary evil in the craft.
Almost every mold will move if its receiving its cure cycles by molding parts instead of a post heat cure with the plug still in place.
You might be able to save the mold by re-inserting your plug or parent part and then adding glassed in beam supports to the mold backside and then placing it all out in the sun for a week or so.
Let me know if you need more help on the subject.
Cheers,Vinny