Wrinkling in laminating tubing!

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Wrinkling in laminating tubing!

Author	Message
whereismillar	whereismillar posted 10 Years Ago HOT Topic Details
Group: Forum Members Posts: 10, Visits: 31	I have laminated a carbon frame tube using 3k 2x2 and unidirectional carbon, Using vacuum bagging! wrinkles have appeared after demould and i wondered why , is the bagging too loose , any advice or tips greatly appreciated!
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Matthieu Libeert	Matthieu Libeert posted 10 Years Ago Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	do you have some pictures? are you talking about the wrinkles of your bag? or did the part came out perfect and then started to wrinkle? Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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whereismillar	whereismillar posted 10 Years Ago Post Details
Group: Forum Members Posts: 10, Visits: 31	Hi mathieu No the carbon itself is wrinkled after removing everything post cure! where the vacuum bag itself was wrinkled when using the pump and curing no pictures yet but will post some tomorrow before bagging the carbon , peel ply , perforated film, and breather cloth were carefully applied! . Edited 10 Years Ago by whereismillar
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Matthieu Libeert	Matthieu Libeert posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	Ok, I'll wait for some images Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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ChrisR	ChrisR posted 10 Years Ago Post Details
Group: Forum Members Posts: 363, Visits: 3K	How long after the initial cure did you demould? Some epoxies require an on mould postcure and others can be post cured off the mould. If it distorted during the post cure it sounds like either the resin wasn't cured enough before initial demould or it softened during the postcure and the forces from the vac bag have caused the distortion. Pictures should tell all but that was my initial thoughts on it
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whereismillar	whereismillar posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 10, Visits: 31	hi chris I actually waited 2 days before demolding the wrinkles in the carbon match the initial wrinkles that formed in the bagging film when turning on the pump, i waited till the resin left in the mixing pot was solid before turning off the pump curing was done in a box at roughly 35 degrees for the whole time the pump was on, cheers! Edited 10 Years Ago by whereismillar
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ajb100	ajb100 posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 346, Visits: 4.4K	How thick is the layup? When you vac bag tubes, the OD shrinks under the pressure and you can can folds in the carbon. It is increased with thickness as you put it on tight, apply vac and all the layers compress creating the wrinkle
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whereismillar	whereismillar posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 10, Visits: 31	i used 0.10 x2, and one of 0.20 carbon cloth 3 layers in total! I was led to believe that vacuum bagging a repair this way was the best way to go ? Edited 10 Years Ago by whereismillar
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Matthieu Libeert	Matthieu Libeert posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	like above if you are making tubes and the CF isnt tight against the tube it will start to wrinkle, It's very hard to get it right, adding peelply to pull everything tight can help, or a piece of vacuumbag Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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ChrisR	ChrisR posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 363, Visits: 3K	It might be better to try a shrinkwrap tape carefully wrapped around the layup rather than vac bag. something like this https://www.easycomposites.co.uk/composites-shrink-tape or http://www.ecfibreglasssupplies.co.uk/p-3180-shrink-tite-tape-32mm-wide.aspx
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