Quote:
Originally Posted by AshG
yep thats all well and good but you need a significant amount of heat to set of the curing process on prepreg, the nature of its design is that you warm it up to make it flexible to shape into the mould then you bag it, stick it in the oven which starts the curing reaction. the epoxy is already in the matting the vacuum have very little effect on pulling the resin through as its already in the matting, the true reason for vacuum bagging is that it pulls the matting right into the mould and eliminates all the micro air bubbles in the resin. (epoxys are very prone to bubbling). if you don't need the ultimate strength in the part you are much better off using a polyurethane resin as its a lot less prone to problems.
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It's not going to be prepreg as nobody will pay the price for what is essentially a budget Kit Car. I used that as an example of how the resin infusion process works.....it's bagged then a pump draws the resin through the mould creating an even spread of resin.
Never was any good at explaining myself....
