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First infusion result. fiberglass + plywood + fiberglass
First infusion result. fiberglass + plywood + fiberglass
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First infusion result. fiberglass + plywood + fiberglass
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oceax
oceax
posted 10 Years Ago
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Yes, it was
polyester, generic resin. I bought styrene for thinning the resin but did not use it in this test.
"
you need to drill holes through the core at regular intervals"
Thanks!
Next time i use plywood, i will put the panel in a cnc machine first.
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Matthieu Libeert
Matthieu Libeert
posted 10 Years Ago
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I agree with ChrisR,
Second thing to keep in mind is moist trapped in the wood, boiling under vacuum causing problems... wood can cause some problems under vacuum
Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com
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ChrisR
ChrisR
posted 10 Years Ago
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Hi, when you infuse with a solid core (doesn't matter what sort of solid core, wood, foam etc...) you need to drill holes through the core at regular intervals, they only need to be 1mm or less but production cores tend to be drilled at 25 or 50mm centres each way. This allows the resin to flow to all areas under the core.
You say polystyrene resin, do you mean polyurethane or polyester?
I'll assume at the moment its polyester, is it a proper infusion resin or was it just generic resin?
Don't ever infuse unless you have a known and complete vacuum, I run my pump (once I've done a drop test) for up to an hour (depending on the stack and the size) before infusing. If you try to infuse without a full vacuum you are almost guaranteed to create a bin part.
When using wood in the laminate you have to be really careful about puncturing the bag by accident (even the infusion mesh can do this too), make sure all the corners and edges have a radius on them and the bag is not stretched at any point.
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oceax
oceax
posted 10 Years Ago
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I tried to resin infuse a panel using the following setup Polypropylene sheet / Fiberglass 220g / Plywood 4mm / Fiberglass 220g / Peel ply / Mesh / Bag
I wanted a "glass" surface finish on one side and peel ply finish on the other side for bonding.
Resin was polystyrene and the top layer wet out perfectly first.
But the bottom layer did not wet out that much.
I had a very small leak that i could not detect with my hearing so i had the vacuum pump running. It turned off after a few hours (overheat protection?). I put a fan against the pump and turned it on again but the panel was already ruined (non wet area in middle of top panel).
Questions
Can i conclude from the non wet area in the middle of the panel that the leak in the bag was at that spot? or does the air that gets in, even if it is from the sides, collect in the middle?
If i had foam instead of plywood would, would the foam let resin through to the bottom side?
I guess i could have added peel ply and mesh on bottom side, but that would not give me the surface finish i want.
Is there some replacement for peel ply that can be used with mesh when you want a good looking surface finish.
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