I use fiberglass cloth behind twill c/f for most of my parts. The problem seems to be too many layers of cloth lead to bridging problems.
My best guess to alliviate the problem is to cut the f/g cloth into sections and then lay it into the mold instead of using one or two pieces of cloth over the whole mold surface.
Thing is i could use the thickness of 3 layers of f/g cloth…so I guess secondary bonding would be the answer to that?
Any help/solutions to cloth and peel ply bridging?
rubber squeegie the corners as the vacuum goes down, dont go full vacuum till you get all the corners. also try cutting the glass and peel ply so that they go in to the corners better
What hojo said, but if you cut the fabric in the corners, you will loose the strength there, because the structural fibers are broken!!
Just rub down more under partial vacuum, and obviously, have enough bagging film too. Cuz if that bridges, due to lack of material in the corners, ya screwed no matter what you do! Plus you can break the bag if stretched too tight.
you can overlap the fibers a half inch to get back your fiber strengths in the corners
thanks guys, yep i was having c/f and f/g cloth bridging on these complex shaped molds.
that and I will say nylon peel ply has NO stretch to it at all.