By ttpb7paul - 9/21/2020 8:17:38 PM
Hi,
I have made some parts via wet layup over a 3D printed core shape using EL2 laminating resin, then I sanded smooth and skinned in a cosmetic layer with your XCR resin.
I want to post cure them because I need to make sure it can take higher in service temperatures.
I'm not sure whether I need to support it during post cure, is it likely to distort ? And if so how much is to be expected ? I don't have a mould as I didn't make it from one, I wondered if I should make a half mould from the finished part for it to rest in during post cure, or some kind of frame to hold it.
The 3D core is stable at those temps, but the shape is spindly so I don't think that will provide much support.
All help and suggestions welcome !
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By Warren (Staff) - 9/23/2020 1:59:05 PM
The jig is a very good idea and certainly should keep alignment. Also as its not in a mould slow your post cure right down. Increase the time spent at each temperature step and even slow the ramp rate if you can. You are unlikely to have the part sag significantly on any decent post cure cycle but the surface finish could easily be ruined as the resin softens and sinks a bit into the fibre. If that happens its not the end of the world but it would mean more flatting and polishing to get a smooth finish.
On the enclosed TDS you will see a few post cure options. I would look at cycle 2 and maybe extend the steps to 3 hours each and a bit longer still at 60. At which point you can finish off with the steps for maximum HDT if needs be.
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