Problems. Defects in specified regions

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Problems. Defects in specified regions

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Dezer	Dezer posted 8 Years Ago HOT Topic Details
Group: Forum Members Posts: 74, Visits: 1.8K	Hello friends, I made two pieces of carbon fiber by the hand lay up process + Vac bagging and I'm having problems with areas as per the picture. Defects such as air bubbles and dry regions. I am not using Gel coat because I will use clear coat when finalizing and I do not use tacky spray because it is a cosmetic piece. I'm using material / resin ratio in 50:50 and vacuum at -28 in. Where can I be going wrong?
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Dezer	Dezer posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 74, Visits: 1.8K	+x Dravis - 9/4/2017 12:57:58 PM Are you using a resin bleeder sheet /perforated release film? sometimes if I want to keep a wet lay part "resin rich", I use several layers of perforated film on top of each other, that reduces the amount of resin that the vacuum can remove from the part, while still allowing the vacuum to keep the fabric conforming to the mould. Hello Dravis, I use breather and perforated release film. I will test with more layers of perforated release film and reduced vacuum pressure. Soon post results. Grateful!
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Dezer	Dezer posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 74, Visits: 1.8K	+x Dezer - 9/4/2017 1:20:49 PM +x Dravis - 9/4/2017 12:57:58 PM Are you using a resin bleeder sheet /perforated release film? sometimes if I want to keep a wet lay part "resin rich", I use several layers of perforated film on top of each other, that reduces the amount of resin that the vacuum can remove from the part, while still allowing the vacuum to keep the fabric conforming to the mould. Hello Dravis, I use breather and perforated release film. I will test with more layers of perforated release film and reduced vacuum pressure. Soon post results. Grateful! I made another part with the following steps: - 3 layers of Mold release wax - 2 layers of separator MX 01 (hydrocarbon based release agent) - I applied a thin layer of Ampreg 26 + A26 Fast (Gurit) epoxy resin for tacky effect and better mold the carbon in the mold. - Laminated wet layup with resin Ampreg 26 + A26 Fast (Gurit) - Degassing resin - 3 layers of carbon fiber 3K - Peel Ply - 2 layers of perforated film release agent (as suggested above by Dravis) - Breather - Vacuum bag - And vacuum pressure this time reduced by -14 inHg. And yet I still have dry-effect problems and air bubbles in those specified areas of the part. Images: I have no idea what I'm doing wrong. Any suggestion ?
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