Using Vacuum for covering parts in CF.

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Using Vacuum for covering parts in CF.

Using Vacuum for covering parts in CF.

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fibernoob	fibernoob posted 7 Years Ago HOT Topic Details
Group: Forum Members Posts: 34, Visits: 134	Hi all. I am having some trouble with the covering of a complex part. (Automotive gear lever surround) The CF Fabric is not responding well to the contours and hole in the center. Lifting with resin etc etc.... I have tried a quick method using vacuum bagging material and the pump ... It seems to be ok so far..but haven't seen much info on doing things this way. Just curious to know if anyone else has tried this. Im still testing the best way to adapt the fabric to the part ...but it seems like a possible shortcut to covering complex parts Cover the part in CF Fabric Cover part with Resin Cover wet part with peel ply Set in bag and apply vacuum. After part has dried ... sand the marks from the peelply using thin sandpaper.... Apply normal layers of resin as finishing coats. Edited 7 Years Ago by fibernoob
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fibernoob	fibernoob posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 34, Visits: 134	+x scottracing - 1/16/2018 9:34:11 PM why are you using peel ply? you dont need to and also have you tried using spray tack to locate the dry fibre in position? A couple of photos would be good too , but when you are trying to do a wet lay and vac bag you dont want to pull full vac as you will pull too much resin out. I am using peel ply because if i use the vacuum bag directly it will stick to the resin ... Ive used spray tack but with the part im doing ... its loosens up the fabric especially on the plastic rib just arrounf the center hole. (location of the gear boot) The resin stays under the peel ply... the vac is mainly to tighten the fabric to the parts contours. This is the part i am trying to skin.... And this is the desired end result. Edited 7 Years Ago by fibernoob
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Using Vacuum for covering parts in CF.

fibernoob - 7 Years Ago

why are you using peel ply? you dont need to and also have you tried using spray tack to locate the dry fibre in position? A couple of photos would be good too , but when you are trying to do a wet....

scottracing - 7 Years Ago

I am using peel ply because if i use the vacuum bag directly it will stick to the resin ... Ive used spray tack but with the part im doing ... its loosens up the fabric especially on the plastic rib....

fibernoob - 7 Years Ago

The peel ply will leave a texture finish which iv found helps grip next coat, I still sand just to be sure :) also means bag can be reused. I tack spray the cloth to the piece, wet the fabric , apply...

Interloper393 - 7 Years Ago

Yes, ... If more resin will be used I often sand it down with thin sand paper because if the texture is left , small dots can be seen from the layers above. If more carbon is to be used, i think the...

fibernoob - 7 Years Ago

That part shouldn't be difficult to do without vacuum, it sort of sounds like you aren't leaving the initial cost of resin long enough before applying the carbon/further coats of resin. But, there's...

Hanaldo - 7 Years Ago

Yes, bridging is the issue im trying to get around when using the vac. I will try again letting the resin come to a perfect tach stage to apply the fabric.... Thanks for the help

fibernoob - 7 Years Ago

It might also help to attach a temporary flange to the inner edge of the part to give the fabric some additional surface to grip to. Making this flange follow the angle of the lip would likely make.....

MarkMK - 7 Years Ago

Thanks Mark. Sometimes its just those small things that can mess everything up. I have considered using some fabric in the inner hole as you have mentioned. Thanks for the feedback.

fibernoob - 7 Years Ago

Here is a pic of the part Note the inner part still shows the peelply texture since it was not sanded. The outer part has already been wetsanded and ready for extra coats of resin.

fibernoob - 7 Years Ago

Aha... I hadn't realised you were trying to skin the inside of that lip as well. That is always going to be a struggle. Do you actually NEED to cover the inside of the lip? It doesn't appear to be.....

Hanaldo - 7 Years Ago

Yes... Considering the contours, lip and centre hole of the part, I think the best way out is to cover the insde radii seperately.

fibernoob - 7 Years Ago

Buddy your over complicating things here.. Key the part with 120 grit Tack spray and stick the cloth to the part, if you push excess cloth into the whole fisn't you with be able to wrap the inside...

Interloper393 - 7 Years Ago

Ok - got your point... and thanks for the tips. But the idea was to try and get the CF into tight sports and complicated bits of the part without any lift after applying the resin.

fibernoob - 7 Years Ago

RE: Using Vacuum for covering parts in CF.

Interloper393 - 7 Years Ago

Nice parts! Well done.

fibernoob - 7 Years Ago

All don' without vac bags

Interloper393 - 7 Years Ago

This is actually very good for me. I have had great results with a hand layup but decided I wanted to learn how to use a vacuum for a few parts as well. I am not trying to make a straight carbon fibe...

MaksE55 - 7 Years Ago

I have tried some parts with various films and get the same issue and some creases too. With peel ply I get the texture on the surface but no excess resin. I have seen on some videos the use of a....

fibernoob - 7 Years Ago

I watched a video of a guy wrapping a intake tube he did. I spoke with him and he used th realease film right on top of the part. When it was done the film came off and the part was perfect. Meanwhil...

MaksE55 - 7 Years Ago

The part is going to come out EXACTLY the same as the surface it is in contact with. If you're putting a perforated release film on it, it's going to come out with the perforations, and likely not...

Hanaldo - 7 Years Ago

So for me the surface texture is not the problem. The problem is there is a thin coat of the film being stuck on the surface of the part. That’s the problem. I wanted to use the vacuum back to gold.....

MaksE55 - 7 Years Ago

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