Propulsion Lead, Agile Space Industries
- Nov 17, 2015
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Looking for someone who would be willing to part with or manufacture a (preferably) aluminum tapered mandrel for composite layups. PM me with offers please.
Exactly that tapered. We've had success removing tubes from straight mandrels before, but it was . . . messy.How tapered are we talking? Just enough to aid in removing the part from the mandrel? I went down that rabbit hole a long time ago and it's way more trouble and expense than it's worth. Removal from a straight tube is easy and cheap, relatively speaking.
Polish the tube, use Frekote as the release and pop it in a freezer (or MA winter) and done. It also helps it it's cured at an elevated temp.
The problem with machining a taper like that is you get many spiral ridges in the surface which need to be polished out. That polishing trashes your tolerances making it low and/or out of round in some spots. Which then makes it harder to remove thank if it wasn't tapered in the first place. Now granted, this was explained to me 15+ years ago, things may have changed since then, and your polishing may be more precise than mine. Or your budget may be way higher.
Well I added those photos but deleted the associated text and the photos. Not sure why they still show up.