Problems. Defects in specified regions

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Problems. Defects in specified regions

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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Problems. Defects in specified regions

Dezer - 8 Years Ago

I could not post the photo here, follow the link in the photo: https://ibb.co/gW4bYa (Image hosted on imgbb.com site)

Dezer - 8 Years Ago

I suspect your vac level is too high for a traditional wet lay vac bag. Assuming that area had plenty of resin to start with, the bag would be likely pulled tight over such a corner, more so than...

Warren (Staff) - 8 Years Ago

Thanks for the answer Warren, Do you have any idea how to eliminate this problem? I had already realized that my vacuum was too strong for this process that I thought of inserting the vacuum an...

Dezer - 8 Years Ago

Ideally you would use a vacuum regulator such as our SMC Vacuum Regulator as it will keep the vacuum at a set level for you. However if you don't have the budget or access to such equipment, as lon...

Warren (Staff) - 8 Years Ago

I have the vacuum gauge to control the vacuum level. What is the ideal vacuum level? For all the parts that are doing are being removed more resin than necessary.

Dezer - 8 Years Ago

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.....

Dravis - 8 Years Ago

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!

Dezer - 8 Years Ago

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)...

Dezer - 8 Years Ago

To me it looks like you are simply not making sure to get the corner areas of your layup wetted through enough When doing wet-lay I always wet out each layer one at a time using PLENTY of resin and a...

Dravis - 8 Years Ago

I weighed each layer one at a time and with an abundance of resin, I mainly worry about the curved regions where it has the greatest signs of defects.

Dezer - 8 Years Ago

it also looks like a bit of bridging in the corners,you need to ensure that you prod the material with a suitable 'dibber' to force the material into the corner as the vacuum bag will not be enough t...

scottracing - 8 Years Ago

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