I have a serious problem with the bubbles. Can anybody help here? How I take them out? Any suggestion?
Here’s some Pics:
Open molding wet lay up or vacuum bagged?
lay release film over the top of your lamentant once its wetted out. Then roll the bubbles out with an aluminum roller.
At the begging I am molding wet the lay up and then I put the vacuum bagged, but to tell you the through I put the bag directly to resin, cf, resin without peel ply or etc.
Are you suggesting somethink?
I use a rubber squeegee directly to push the bubbles and excess resin off of the carbon. Push everything off of the mold surface. Be careful though, depending on the thickness of your bags, you may pop a hole/ rip the bag.
I will try to make that with the way that you suggest, but I am little circumspect because the bubbles it is from the side of copy (first resin “bubbles”, second CF, Resin, Vaccum bagging), therefore when I remove the copy is on the top.
But I will try!!! Is there any preparatory work for the resin or just we make slowly the mix-up with the harder?
What resin matrix are you using? PER…less cataylst but much longer final curing time in the mold.
Epoxies usually have different hardeners with longer curing times.
Try laying in the gel coat, let it “B” stage, then take the 1st layer and wet it out on both sides on some newspaper, then apply it into the mold gel coated surface and work it in…
Since you are vacuum bagging it, get a longer gel time resin or work faster (have everything already cut and ready before mixing anything up)!
Thats your problem right there. With out using breather your getting maybe 5 inches of vacuum. Probably less.
So you think the problem comes because I am not using breather? wow I am going to buy that.
But people really thanks for the informations.
Use the Airweave N4 from Airtech, but since you are only usin vac pressure you can use other kinds of cloth breather. It is on the bagside so it will be rough a little. Even cotton t-shirt or osenberg cloth will work. Any course thick fiber cloth. Remember to use a release film and it can be non-perf or pin-prick perforated if you want excess resin and gas to excape. Try some samples of the materials and see what finish you want.
Make sure the surface breather is connected to the vacuum source and make sure that is doesnt touch the resin or it will suck up into the port…
Bill really thanks, all of you people thanks, yours answers are very useful.
Did you now the airtech infusion? Is that good product? I see the cd rom how you can composite but I don’t know if this system can use it in bike panel, because is small!!!
Airtechs infusion process’s will work for your bike panel. For cosmetic parts its ideal.