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Keeping the carbon on the flanges during layup
Keeping the carbon on the flanges during layup
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Keeping the carbon on the flanges during layup
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mrlindeman
mrlindeman
posted 9 Years Ago
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I have been running into a persistent issue with some proof in concept work I am doing.
Materials:
C&J Composites epoxy 2-1 part resin.
2 X 2 3K 5.7 OZ carbon fabric.
6 inch by 3 inch half round mold.
This mold is taken off of a tube. Its a 1 piece half round shape. It is a gel coat finish with one inch flanges.
The mold is prepped with a thin coat of resin and 2nd stage cured to tack. Then the first layer of carbon goes in.
The problem I am having with this and many other molds is, that once the carbon is pressed into the mold and the edges are folded over to tack to the flanges; there is lifting in the bend which caused voids on the edges. Even at full tack it still lifts. When more layers and resin is applied the issue gets worse. The remainder of the part looks almost perfect but any contours like this cause the fabric to peel slightly and cure with dry areas.
This is a hand layup and with vacuum it would not be an issue, but I am trying to figure out how this is done successfully in a strictly hand layup process.
Thanks for any help. My digi-cam is dead so unfortunately pics are not an option.
Air Bubbles, Pin Holes, & Voids are my worst enemy. I am committed to their permanent prevention at all costs.
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Keeping the carbon on the flanges during layup
mrlindeman
-
9 Years Ago
You kind of answered your own problem in that wet lay is not quit cutting the mustard. But there...
VVS
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9 Years Ago
I see what your saying! I was thinking that a bag full of flour or sand could be used to place in...
mrlindeman
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9 Years Ago
put thin plastic film like cling wrap over the lay up squeegee all air out and should stay put
George Sychrovsky
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9 Years Ago
Hi! I use plastic bags full of hot water, for the "bowl-shaped" or irregular shaped parts -- Not...
Dravis
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9 Years Ago
Ok guys, the progress is as follows. I remade the part and followed the previous layup. Taking into...
mrlindeman
-
9 Years Ago
Plastic bags of water to apply pressure to the mold cavity is a great idea. I have been using rigid...
Zebra
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9 Years Ago
You could also consider a silicone intensifier where you would have an inner silicone block that...
Fasta
-
9 Years Ago
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