Evening Chaps,

curved components will always move about depending on your layup, have you gone quasi layup in your plies? If its unbalanced or you have too many ±45 direction then it will springback, you might need to add another couple of 0degree plies in there.

Also when you remove the part from the mould, is it completely cool?

Thanks for the reply,

If you are only using a single ply it will be difficult to counteract the spring action without adding more material.

Just the EC pre pre twill at the moment, but if there is a better material or number of layers or layup that would help me out that i can test would be great.

14 psi is not much pressure but the bladder process does rely completely on the stiffness of the mould. So maybe it could be the mould bending? I recently had the same problem with a fan blade we made but this was 40psi.