Hello,

I have a doubt, where do i place dthe connectors using this 2 materials?

This way??



Or this way?





Or another one??

the realese film that i have is unperforated.

Thanks,

Pedro

Hi,

The silicon connector should be placed on top of the breather cloth. It serves two purposes: getting an even vacuum pressure everywhere your breather cloth is, and catch excess resin that exists thru the release film.

Which leads me to a remark. I'm assuming you are gonna make a part with the vacuum bagging process. However, you told us that your release film is not perforated. It will then not let resin thru to the breather cloth when everything is bagged and under vacuum. Unperforated release film is usually perforated by its user to control the resin flow thru it on a way that works better for their application. Having too much resin in a composite is never as good as having a decent ratio.

Maybe there's a technique I'm not aware of, tho.

Hope it helps.

 



 


    A $1000 electronic device will always protect a 10 cents fuse

Yes, the process is RTM.

I didn´t especified, but my doubt was about the infusion connector.

Ok, that´s why i was with difficulty to infuse my parts...the film must be perfurated to allow the resin flow.

Once again, thanks a lot, Joe.

Pedro

Hi,

You mentioned "infusion connector", so I'm assuming that you are talking about resin infusion. If its the case, please take note that Vacuum infusion IS NOT DONE THE WAY that vacuum bagging is done.

VACUUM INFUSION: a process to pull the resin in your fabric, once you put the dry fabric in your mold and that the mold is already under vacuum. The fabric is still dry at this stage. Typical lay-up is: mold, release agent, fabric, peel-ply, resin flow media, vacuum bag. You need two silicon connector in this case. One for pulling the vacuum once you layed your fabric and consumables. The other to inject (or pull, as you want) the resin, once you performed a leak test. You dont need breather cloth in this case, and the release film is a peel ply.  

VACUUM BAGGING: a process to lay your fabric in your mold, wet it with resin by hand, then vacuum bag it all. Typical lay-up is: mold, release agent, wet fabric, perforated release film, breather, vacuum bag. You only need one silicon connector in this case, to pull vacuum in your mold. This connector needs to be on top of the breather cloth. Breather cloth is here to evenly distribute the vacuum pressure as well as soaking excess resin, helped in that by the perforated release film.


You can see these two methods are really different. I cannot stress enough on documenting yourself the most that you can before you make a part. Even people who work in composites for years do mistakes from time to time.

Let us know if you intend to make your part with vacuum infusion or vacuum bagging.


Hope it helps.

 



 


    A $1000 electronic device will always protect a 10 cents fuse

Hello,

I´going to explain what i´m doing: it´s a front motorcicle fender, and i want both sides shinny as the piece come out of the mould, so that´s why i´m using release film and brether cloth.

I thought i could infuse it, but it seems i can´t, i was mixing the processes.

I think that i´ve already seen this way, but now i´m not sure.

Hereupon, what is the best way to do it?

Thanks,

Pedro