I've been looking around for some info and found a few tidbits, but didn't see a thread dedicated to the art of composite tube making. I was wondering if some of the pros would be willing to share some info. I'd love to start making some small diameter tubes, say 38mm and under. I've had some success glassing cardboard tubes, but I'd really like to try full FG and CF layups. My plan is to start with materials I already have, CF cloth and Aeropoxy laminating resin. I know I'll need mold release, any tips there? How about mandrels that are close to the right diameter? It looks like 3/4" copper pipe is pretty close to 24mm, for example.
Another option that comes to mind is dissolvable mandrels. Perhaps 3D print in PVA, then use water to dissolve the mandrel out. ABS dissolves in acetone, though I'm not sure how well epoxy holds up to acetone.
Another option that comes to mind is dissolvable mandrels. Perhaps 3D print in PVA, then use water to dissolve the mandrel out. ABS dissolves in acetone, though I'm not sure how well epoxy holds up to acetone.