Poor B side surface on vac infused part


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Balazs Szikszai
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Hi, I've been trying to vacuum infuse basalt fibre using the EC infusion kit with an existing vacuum pump. The mould is made from aluminium, and the A side seems to be coming out really well, but the B side (peel ply side) looks to be aerated between the top few layers every time. I recently changed the direction of flow to run along the part rather than across it, which was an improvement but its still not coming out right. I've tried this 4 times now with various directions and layups but I can't seem to get it to work properly.

I wasn't able to order an EC epoxy as I'm in Australia so have used a local resin supplier. The vac pump pulls a strong vacuum, well under the -30inhg gauge minimum. I haven't degassed the resin.
Is there anything specifically that causes this type of failure?







The left one was resin flow across the part from left to right, and the right piece was flow from top to bottom, having to travel over the bends.

Thanks


Edited 6 Years Ago by bszikszai
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Chris Rogers
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MTI hose is awesome!  I agree with KLComposites and have had great results with Proset too.  

Here's some evidence from the Easy Composites documentation on infusion that Google found for me.  It contradicts the video (which I just realized is the source of this pump turning off bit) - it worked in the video but it is a bad idea in general.  Videos are otherwise excellent!

https://system.eu2.netsuite.com/core/media/media.nl?id=59028&c=3937524&h=ed6c113ff018e812d5f3&_xt=.pdf



Here's one more great infusion resource from Vacmobiles in NZ:

https://www.vacmobiles.com/resin_infusion.html


I'll be interested to see how your infusion goes when you try again.  Next time I'm unclicking the "Notify me of replies to this post" button!  




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bszikszai - 6 Years Ago
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