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

I'm on Hanaldo's site here. To get reliable and reproducible results with vacuum infusion your bag needs to be perfectly airtight. And then you do not need the pump to apply pressure on the laminate, pressure remains the same during curing.
With a decent size resin break you won't pull air out the system either. And when switching the pump off, you don't get into problems with the resin off-gazing volatiles.
And i know plenty of professionals working in the industry for years who turn off the pump once infused...