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Matt (Staff)
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Do you think it's possible it came from the mould surface? Not enough smooth which let place for air between the mould and the carbone layer?
I don't think so. If your vacuum pump has pulled all the air out of the bag any gaps (even tiny gaps due to the texture of the surface) will simply be vacuum (i.e. no air), just space into which the resin can flow.
And excuse me Matt for repeating my answer but english is not my main language (so I hope you haven't difficulties to understand me ^^) so, during my infusion, if I see any bubbles (moving for extraction), I let the both vaccum and resin line open until I don't see them any more. It doesn't matter the time it take. After I close the both clamp like normal... Is it right? (I couldn't use that technic with sonic infusion core for the next one, it's just by curiosity)
Correct, you can keep the whole 'cycle' running for as long as you want to flush it through. We'd always hope to not need to do much of this because it wastes resin but if it helps to troubleshoot the cause of your problem then it's worth doing. Remember to close the resin feed line off first in this situation and let the bag pull down a bit before clamping off the vac line, otherwise you will have too much resin in the laminate.
I don't see any reason why this wouldn't work with Soric either.
--Matt
Matt StathamEasy Composites / Carbon Mods - Technical Sales
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ARSOUILLERB26
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Hey Joe, I think I'm not the only frenchy here, isn't it?  When you want to share an "apéro" together A LA TIENNE !!  So for the degassing, it was not done with the catch pot because the resin container wasn't big enough, I just waited 10 min (it stayed a really few bubbles but only in surface and the aspiration was of course deeper... but this bubbles are so tiny that it s possible I have not seen them). Next time I will do it inside the catch pot, in 2 times if necessary. For temperature, I live in south of France so it could be worst  The ambiant temperature was below 20° but the resin was stored inside a heated tent at 24/25° but I'll try higher storage temperatures and same thing for the working place. To Matt: thank you for the compliments, That's right the blue carbon looks amazing in the sun. I'm really hurry so see it cutted and varnished. So I saw where exactly was the bubbles and they are in every corners/edge especially at the resin admission side (strange, I thought it would be on the vaccum side) Do you think it's possible it came from the mould surface? Not enough smooth which let place for air between the mould and the carbone layer? And excuse me Matt for repeating my answer but english is not my main language (so I hope you haven't difficulties to understand me ^^) so, during my infusion, if I see any bubbles (moving for extraction), I let the both vaccum and resin line open until I don't see them any more. It doesn't matter the time it take. After I close the both clamp like normal... Is it right? (I couldn't use that technic with sonic infusion core for the next one, it's just by curiosity) Thank you again for your patience mates
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Kevin-Lee
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Looks Fantastic mate! ...just those last few bubbles to sort out and I think you could have it perfected...
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Warren
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Id say try degassing the resin under vacuum before infusing it to elimate the possibility of it being resin. might be because its colder at the moment that the mixed resin is thicker than normal meaning it doest degas naturally as well as normally.
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Joe
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Isn't it air from the resin? Maybe a "cold" resin from which bubbles would have difficulties to flow out? This question, because if the bag is not leaking, air comes from the resin, in my opinion.
 A $1000 electronic device will always protect a 10 cents fuse
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Matt (Staff)
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Hi Arsouille,
That really is getting to be a very high quality looking product. I think yours are the first photos that I've seen of an infusion using the coloured fabric and I'm amazed how great the weave looks. The coloured fabrics (a bit like carbon/kevlar hybrids) usually show weave distortion much more obviously but the weave looks incredible. Great work putting that in so neat. I guess being a fairly flat shape helps a lot with that.
I'm still slightly puzzled by the air bubbles. They really are looking *tiny* now. Do they exist only at one side of the infusion (I can see that they're mainly at the very edge and in the main part they're past the 'trim line' but are they ocurring mainly at the vacuum end of the project? - If so then it might be (in your case) worth purging considerably more resin through. That is to say leave both the vacuum line and the resin line open quite a while after the resin has reached the vacuum line at the other side. If it's the resin at the 'front' of the advance that's harbouring the bubbles then purging it through (into the catch-pot or at least the vac line) might get rid of the problem. Once you've purged through in the manner you'll need to clamp of the resin line and then let the vac line pull down for a little longer to get some of the excess resin out of the laminate.
I hope this helps but the problem still must be being caused by something else that I'd love to get to the bottom of for you allthough it seems to be escaping all of us at the moment. Infusion projects that we do at EC (and Carbon Mods) really don't display any air bubbles like this so it certainly can be done!
All the best, Matt
Matt Statham
Easy Composites / Carbon Mods - Technical Sales
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Joe
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Muhaha it looks awesome, especially in the sun. With the summer coming, it will definitely be a very good match to a glass of Ricard, isn't it? Santé, Arsouille  : P'tit Jaune +  +  = 
A $1000 electronic device will always protect a 10 cents fuse
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ARSOUILLERB26
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Hi kevin, the peel ply side is the inferior, the glossy superior side is the gel coat side So my new blue carbon tray infusion is done following your instructions. I tested the vacuum 2 days long, I had a little air leak of 0.01 bar max in 4hours, that I hope I have been able to fill. I have done 50% fast harderer / 50% slow to accelerate the process and limit the damages if I didn't. He's composed of 2 layers of bleu carbon for the exterior and 2 Fiber glass layers for the reinforcement. The infusion looked good, the resin was degassed on open air but when the resin has reached the catch pot, il remained bubbles visibles on the infusion mesh... so instead of the recommended 2/3 seconds, I waited a little more (I had a lot of resin mixed by security so I could) but when I've cut the feed line andd just then (5/10sec) the vacuum line, it still remained bubbles in the infusion mesh (mooving in vacuum direction, not stoped) I precise... is it normal? Would I expect that the infusion mesh was free of any bubble? When, once demoulded, I still have bubbles, only on the edges but really smaller and fewer at earlier. Most of them are not in the final part but in the losses. I had the impression to have well pressed the infusion mesh on the edge so I think i m on the good way but a little more help will be welcome. I finish with the pictures (as you ll see, the tray is not cutted yet) |
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Joe
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Hi, Arsouille. Well I think i'll be jealous again then. Good luck for your project.
A $1000 electronic device will always protect a 10 cents fuse
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Warren
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what kevin means is which side of your tray is the "shiney" side.
Just take it slow and steady.
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