Hi all

I've been lurking on here for a while and have recently started making some parts for a project car.  I've started using resin infusion hoping to get a more uniform finish and like everybody (I guess) I occasionally get voids where I havent gotten my cloth in to the corners but I'm also getting surface voids along the edge of where I have used closed cell foam as a stiffener.





The above is 2 layers of 200g carbon, the stiffener then another 200g layer on the back, any advise on what I'm doing wrong would be appreciated.

Thanks

Hi,

I never used closed cell foam so I'll let experienced people develop on this.

But I know that voids can be due to pulling the vacuum for too long after the resin feed line is closed. If you're concerned only about strength, then its the way to go.

But if you want "cosmetic perfection", then you should shut off vacuum line first, then resin feed. Some people will even let resin feed opened a minute after the vacuum line is closed. That way you'll get "resin rich" laminate which is less prone to voids.

If I was to work with closed cell, I would do the way that FLD suggested: first the outer skin and then the rest.

Hope it helps.

 



 


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