Infusion firsts


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Matthieu Libeert
Matthieu Libeert
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As an extra remark I would like to add that acetone wont clean your connectors once epoxy cured, acetone can clean epoxy while its in a runny state, like when you just use a brush and want to clean your brush. the cured epoxy can be drilled out with a drill.

Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com




fgayford
fgayford
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You called it right. If you had infusion mesh the whole way you would have a great part. You would have destroyed your connectors. They are the wrong ones to use.
Fred
bewbzout
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Thank you guys again. Yea i was worried about how to clean those connectors. I was told acetone works well but unsure how true that is. Just bought a few things from easy composites including the rubber connectors. That shipping to the west side of the states really sucks though.
ajb100
ajb100
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You can do it without using either, run the resin in tube between the gum tape and vac bag with a ring of tape around, then use some spiral stuffed in the end to stop it collapsing. Have a piece of spiral taped all across the part and place the bit of spiral sticking out the tube on top of the spiral line
ChrisR
ChrisR
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I forgot about them! Used them a few times and they work a treat
Hanaldo
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Or get the silicone or nylon infusion connectors. Reusable and work great. Cheap as chips too.
ChrisR
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Also, in addition to whats mentioned above... you are using some very nice through bag connectors for infusion, these will get destroyed pretty darn quick (wait until you try and clean them out!)

Next time get a plastic t piece the right ID/OD for a few pence and treat it as a disposable part, use the bag tape and wrap this around the hose where it goes through the bag and seal that way. You also should take the infusion mesh across the part a bit more so you are infusing down and along the part rather than just through, it will reduce the drag from the resin and infuse further
bewbzout
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Thank you for the information. I didn't realize that we were also using the wrong resin. You guys are awesome and thank you for the help
Hanaldo
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I really suggest you have a read of products data sheets before trying to use them. A quick google tells me that the System 2000 resin has a mixed viscosity of 950-975cps. That is very very thick for infusion, you ideally want a resin with a mixed viscosity of around 200cps, though I frequently use Renlam 3600 which is 300cps and that works quite well. The System 2000 data sheet does specifically say that it is for open mould processes. On top of that you are using the fast hardener, so your resin would be setting up and increasing in viscosity which is why it slowed down towards the end. For infusion I wouldn't use a system with a pot life under 60 minutes unless it is a very small part. 

Secondly yes, cover the entire part with peel ply and infusion mesh. You should check out the Easy Composites video on YouTube of How to do a Perfect Infusion. That will address all of the necessary techniques. 
bewbzout
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Thank you for the replies. I am thinking our biggest problem was not using the infusion mesh across the whole part. My question though is without the peel ply how do you keep the part from sticking to the CF? Do you lay a full layer of peel ply then a full layer of infusion mesh? 

Oh I'm not sure about the resin but it is sold for doing this stuff. We chose the 20 min hardener because we figured this was a really small part and it should have covered faster. Are we wrong on thinking it will cover 8"x10" in 20 min? 

Thank you so much for the help
GO

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