VIP or 2 part mould


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al010964
al010964
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Hi,

I have been trying to build some small composite parts using either f.glass and or carbon 2/2 twill or a combination of both.

The basic part is approx. 3" long and has a deep 0.6" cavity about 0.3" wide in the shape of a Doug out canoe.

I have tried to a vaccuum bag setup pulling 20" inches but was getting voids and bridging... Etc.

Having just watched the videos should I try VIP and get a pump that can pull 29-30 inches or continue down my current path which is Making a mould (female/male).  I am getting close to getting it right, but it has taken several goes with a cnc machine.



Next question is do you have a product that can be used like gel coat on small parts to get a good finish, currently using 3/4 fglass as the first layer but still get some pin holes.  Just don't want to go to all the effort to setup a dump gun for a 3" part.





Thanks in advance,



Adrian
Australia
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al010964
al010964
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Posts: 5, Visits: 75
Hi All,

Sorry part is about 6" not 3"'s as it is mirrored.

The part is for an RC Plane.

I have put a screen capture, note this is an ealy drawing - don't have the current one available, the only difference is that all the edges have a 0.1 radius in the final one.

I have tried a variety of fabric's CF and GF in e.g.

1x 3/4 oz GF & say 2 x layers of 2.9 oz CF (2 twill) @45 degrees.

Matt I suspect this you may be correct abut poor bagging technique / vaccuum.

I also am starting to suspect this part my be on the limits and need an A & B mould ???? not sure until I try again.

Happy to hear everyone thoughts.

NeilB - No dry season is long gone Sad we are starting to get an early wet.

Cheers,

Adrian
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