Carbon fiber skinning (Help needed)

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Carbon fiber skinning (Help needed)

Author	Message
Fraser.Booth	Fraser.Booth posted 10 Years Ago HOT Topic Details
Group: Forum Members Posts: 1, Visits: 9	Okay so I'm having a couple of issues when skinning my parts. the first issue that i had is that I'm getting clusters of bubbles on the part but they are not carrying across the whole part. I am mixing my resin and allowing to 5 mins to de-gass i then cover the part with minimal resin and then go across the surface with a heat gun to try and eliminate any surface bubbles. The next issue that i am having but haven't got any pictures of it... I am finding that the carbon fiber is lifting when i am applying my first coat of resin. I have tried using a little amount of resin and i have tried using a large amount but in both cases the carbon fiber lifts as if it has a bubble underneath it. I have tried pushing it back down but it doesn't seam to want to stick to the part it just lifts back up. I have tried using the 'fusion fix GP spray adhesive' and i have also tried using the black skinning epoxy base coat, both with the same results. I don't know if this makes a difference but it isn't the whole surface that lifts its usually where a flat edge starts to meet a corner the flat edge will lift slightly (isn't bridging because its the outside of a corner not the inside) and it doesn't always do it in the same spot. Any help would be more than appreciated, thanks in advance Attachments IMG_1804.JPG (2.7K views, 398.00 KB) IMG_1859.JPG (3K views, 514.00 KB) Tags Skinning
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TomDesign	TomDesign posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 454, Visits: 2.5K	Hi man i do tons of overlays. u got bubbles under that mean your carbon not stick onto piece as you not cleaned it or not brushed surface with paper like 100. Second, you can use roller to do that. Third each time u lay epoxy you need to heat with at least hair dryer to take out bubbles, third on first layer you not done this so that left, also all the time look at your carbon cloth of imperfections or dusk. Like i say for me epoxy not work Also polyster resin not work
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Hanaldo	Hanaldo posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	I'd say the lifting is more likely because you haven't let the base coat cure to enough of a tack before laying the carbon on. Carbon is inherently stiff in nature, so it's doesn't like to go around corners which is what makes it lift near a corner. You need to apply the black base coat and allow it to cure to a stage where it is tacky to touch but doesn't come off on your finger. This will hold the carbon in place better. Of course some radius are just too tight to skin easily.
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Warren (Staff)	Warren (Staff) posted 10 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8.5K	Adding to the points above, it can certainly help to use the heatgun to lift the bigger bubbles. It is a bit of a fine art to find the right moment to lay the carbon. Too early is better than too late, as if you do it a bit too soon you can always wait until it tacks up properly. Some people find leaving the carbon in place for a bit longer before adding the clear resin can help too. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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Dravis	Dravis posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 592, Visits: 1.9K	certainly, if you do like I did a few times, and go a bit early with the CF on the "tto tacky" base-coat, and THEN add the coating epoxy too early, the the whole thing starts "sliding" apart ... messy .. and NOT very pretty--- I make sure to hit the exact right time for the base-coat "tackyness" lay on the CF... and then I wait until I'm sure that the follow up epoxy coats will not soften up the base coat ... "Sapere Aude"... Dare to KNOW! The written word is the only truly efficient vehicle for transmitting a complex concept from mind to mind... 103% of all people do not understand statistics... Do not adjust our mind, theres a fault in reality :-)
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