I have a round tube “mold” i want to make a c/f tube off of. The aluminum mold is a tube itself that is .065" thick material and it is welded closed along the long seem, and it is heat treated aluminum… probably T6 or T8.
Ok so the question is will vacuum crush the tube at 29hg? I was thinking of making the vacuum bag just long enough to fit the tube, not enough to push inside the mold tube.
You can use coated heat shrink tubing from solar composites.
Are you talking about crushing the Al. tube, or the mold?
Are you making a one piece mold? If not, then you won’t be applying vacuum to the whole tube.
Will you be sealing the ends, as in a full envelope bag?
I wanted to use 2x2 twill for material, not sure what you mean about heat shrink tubing?
Tthe mold is actually an aluminum full diameter tube. I want to shove it inside a vacuum bag. Will it crush or deform the aluminum tubing?
I suppose I could run sticky bag tape on the inside diamter of the tube on each end, bagging it that way.
… bump…
Please don’t “bump” threads.
Why do you need to bag the entire tub? Are you making a 1 piece mold of the whole thing?
How will you take it off?
I will cut the laminate to remove it from the tube.
If the tube is placed inside the bag it may. If the bag is placed on the exterior of the tube, with the hollow part exposed and not under vacuum, then it wont.
1: polish the tube, then you can pull it right off
2: no, vacuum will not crush the tube.
3: use heat-shrink tape, like from Dunstone…bagging might make the fabric fold where the bag creases (any bagging will have at least one seam, unless the vac bag is a tube, the exact size of the mold!)
4: if you bag the tube, use flash breaker, or even packing tape to close the ends so the bag doesn’t suck into it. Several layers.
or, layup the tube, and wrap it TIGHT with electrical tape, then poke holes in the tape to let the resin escape.