Metal inserts - Carbon fiber layup


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Trace Elliott
Trace Elliott
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Hello everyone,

I'm designing a drone, and I would like to be able to bolt two plates together (rather than use an adhesive, because if something breaks, I'd prefer to be able to change the piece that broke, rather than a whole assembly).
The plates would be 2-3mm thick, made by resin infusion.
To that effect (bolting plates together), I'd like to put a metallic insert in the lamination, prior to the infusion.
The insert would be a nut, essentially.
I know you can make the plate, then drill a hole and glue the insert, but I'd rather infuse the whole thing at once, if it's possible.

My question is: how do you put an insert in the fiber stack?
I read everywhere that you should have pins in the mould to accurately locate the inserts, but very little info on how to blend the insert in the fiber stack.

Should I spread the fibers apart? I'm thinking that won't look good
Should I punch a hole through the stack? Hello fibers everywhere...
Should I lay the first cloth and spread the others around the insert, and grind the first layer to reveal the insert?

If you have any ideas, please do tell :-)

Thank you very much!
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