Pinhole filling


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Matthieu Libeert
Matthieu Libeert
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to get it black if you want to, you can use some graphite powder, cheap and easy to mix

Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com




carboncactus
carboncactus
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matthieutje65 (27/01/2013)
why not doing te same with epoxy and a sponge or something? have no idea what results it might give BigGrin

If you tape everything that is ok and just leave the places with pinholes, use a sponge with some epoxy resin, go over the pinholesI if the surface is flat, go over it with a hairdryer to level it all out,  and let it cure. 
once cured give it some wetsanding and polish the part. 


Im working with out of autoclave prepreg, pinholes are evenly spread throughout the part and also they are very, very small. Microscopic even, some dont appear until you apply the clear coat, as they seem to get bigger the more coats it gets.

It needs to be quick and easy, as I can't spend half the day on a part thats half a square metre. Time is money and all that.

http://www.talkcomposites.com/Uploads/Images/db628ad5-e0e7-47b9-873a-3d84.png
Matthieu Libeert
Matthieu Libeert
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I think that any postprocess you'll do will take you some time...
maybe you should figure out where it goes wrong and redo the part till it's perfect...

Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com




carboncactus
carboncactus
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Sorry for digging up an old thread.
This is OOA prepreg, Matthew, the pinholes are microscopic and evenly distributed throughout the whole part.
There is nothing "going wrong", it's the nature of the prepreg. The only way it comes out with less pinholes is to have a perfect bag, perfect dwell, perfect ramp, vacuum on the whole day. Even then there will still be pinholes.

http://www.talkcomposites.com/Uploads/Images/db628ad5-e0e7-47b9-873a-3d84.png
GO

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