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Pinhole filling
Pinhole filling
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carboncactus
carboncactus
posted 12 Years Ago
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Hello, new here.
Been making some out of autoclave parts in prepreg, but I'm having problems with pinholes. They are very small. Lacquering and sanding time and time again doesn't seem to work. I believe they must be filled. Looking around the web, most products made specifically for the job seem to be American. Does anyone know how to do this efficiently? Needs to be cheap, quick and easy. It will need to be lacquered afterwards for UV protection.
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carboncactus
carboncactus
posted 12 Years Ago
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Thanks for your replies.
I have found this product:
http://shop.r-g.de/4DCGI/ezshop?action=direktanzeige&artikelnummer=954200&fromaction=showpage&ButtonName=Glues/Fillers/Varnishes&Beschriftung=&WorldNr=1&suchbegriff_1=Glues%2FFillers%2FVarnishes&suchbegriff_2=&suchbegriff_3=&suchbegriff_4=&suchbegriff_5=&suchbegriff_6=&suchbegriff_7=&sKontaktID=653650&sKontaktKEY=OwUPww5wQYAGQQgfw6ucgMscK0FUFu&sTICKCOUNT=23390379
However, they want €70 shipping because its a hazmat product being shipped internationally!
It seems to be polyester based, I wonder if I can make my own using a clear resin and adding a very fine filling powder and black filler?
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Matthieu Libeert
Matthieu Libeert
posted 12 Years Ago
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why not doing te same with epoxy and a sponge or something? have no idea what results it might give
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.
Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com
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carboncactus
carboncactus
posted 12 Years Ago
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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
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.
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Matthieu Libeert
Matthieu Libeert
posted 12 Years Ago
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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
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carboncactus
carboncactus
posted 12 Years Ago
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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.
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Matthieu Libeert
Matthieu Libeert
posted 12 Years Ago
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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
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Pinhole filling
carboncactus
-
12 Years Ago
Turtlewax enriched polish and wax has a chip stick which you can use. Was recommended on a easy...
Jack.Strong
-
12 Years Ago
If you apply any wax based product then you won't be able to clearcoat on top of that. The only way...
wozza
-
12 Years Ago
you can use a black filler... either a black body filler or some epoxy filler. if you do this...
andygtt
-
12 Years Ago
[quote][b]carboncactus (22/01/2013)[/b][hr]Hello, new here. Been making some out of autoclave parts...
fgayford
-
12 Years Ago
http://www.fibreglast.com/product/Glass_Microspheres_22/Fillers they have a tutorial where they use...
brasco
-
12 Years Ago
Ok Brasco but if you still want to keep a transparant 'coat', to be able to see the carbon this is...
matthieutje65
-
12 Years Ago
ack!! i made a mistake --sorry. this is for the finished product then damn now i feel like a...
brasco
-
12 Years Ago
Thanks for your replies. I have found this product:...
carboncactus
-
12 Years Ago
why not doing te same with epoxy and a sponge or something? have no idea what results it might give...
matthieutje65
-
12 Years Ago
[quote][b]matthieutje65 (27/01/2013)[/b][hr]why not doing te same with epoxy and a sponge or...
carboncactus
-
12 Years Ago
I think that any postprocess you'll do will take you some time... maybe you should figure out where...
matthieutje65
-
12 Years Ago
Sorry for digging up an old thread. This is OOA prepreg, Matthew, the pinholes are microscopic and...
carboncactus
-
12 Years Ago
to get it black if you want to, you can use some graphite powder, cheap and easy to mix
matthieutje65
-
12 Years Ago
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