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

There's no need to leave the pump running after an infusion, it can't do anything anymore. Even if you did have a leak or moisture issues, the pump can no longer remove that air without removing resin with it. Then once the resin starts to gel, it can't remove anything at all. 


My gut tells me that you have a leak, which is why you had a different result between those pieces - the flow direction change was coincidental. What is your mould made from, it looks like timber? How certain are you that this is 100% air tight?