Resin infusion, problem with patches of resin off of the surface left in mould.

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Resin infusion, problem with patches of resin off of the surface left in mould.

Author	Message
Ozonedge	Ozonedge posted 11 Years Ago HOT Topic Details
Group: Forum Members Posts: 7, Visits: 71	Hi guys, New to the infusion world i have used all of easycomposites products threw out my project. from the pattern making, uni mould and epoxy infusion. This part is quite small 39cm x 9cm. ive made two using just epoxy infusion and one with GC50 and infusion. The GC50 released with no problem at all, but the two straight infusions left resin from the surface of the part, in the mould. once infused i put it in an oven at 55c for 12 hours. i also put the pot that had the left over resin in the oven as an indicator. the pot and surface of the vacuum was solid. once started to release the part i heard a slight crack which i recognized from the first attempt. on the second attempt i put 6 easy lease coatings on the mould as did not want it to happen again. any ideas? Many thanks Mark Attachments IMAG0998.jpg (388 views, 897.00 KB) IMAG0997.jpg (352 views, 774.00 KB) IMAG0999.jpg (349 views, 1.00 MB)
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Brian_s	Brian_s posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 99, Visits: 2.5K	Are you using the fast or slow hardener? My guess would be that the resin is not fully set. You have no problem with the GC50 as it is fully set weather the Epoxy is or not. Brian.
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Hanaldo	Hanaldo posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	I would let it cure at room temp (25 degrees) for 24 hours before putting it in the oven, but that's just me.
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Ozonedge	Ozonedge posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 71	Thanks Brian, The first wing i used fast hardener but it started to gel before it fully infused. after i let it go off 10 hours in an oven at 60c the same thing happened but worse.. The wing in the above pics i used 2/3 slow 1/3 fast hardener. could it be i did not put the easylease on heavy enough? ive just cleaned the mould out but had to use 1200 emery as it was fully bonded to the the surface? Next time ill try a real heavy app of the easylease. Thanks for your reply Mark
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Ozonedge	Ozonedge posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 71	Hanaldo (08/05/2014) I would let it cure at room temp (25 degrees) for 24 hours before putting it in the oven, but that's just me. Yes it could be by impatience as well, ill try that as well Thank Hanaldo
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ChrisR	ChrisR posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 363, Visits: 3K	with any chemical release agent you need multiple light coats rather than a single heavy one. Looking at the IN2 post cure, I read it as 25deg - 24hrs THEN 40deg - 6hrs THEN 50deg - 6hrs THEN 60deg - 12hrs not infuse then have an elevated temperature cure did you post cure the mould before using it?
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Ozonedge	Ozonedge posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 71	Thanks CrisR, I put about 5 light layers of easy lease 15 minutes apart then the last was left for around 5 hours. I will leave it 24 hours to cure at 25C odd and then elevate the temperature. Maybe it did not like going straight in at that temperature. The mould has been in the oven several times now so I'm sure it should be fine. I'll try another one this weekend and I'll leave it for longer. And report back to see if it cures the problem ! :-) Thanks again Chris
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Ozonedge	Ozonedge posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 71	Ok, an update to my problem. Its been a couple of weeks now, but shortly after i started this thread i spoke to Warren at EC. They reckoned as i was putting the infusion into the oven at around 50c, their was still styren in the uni mold. they said to try the infusion and cure at room temp 20c. well i was excited to see if it worked, and thankfully it did. once cured i post cured the piece in the oven and all was fine. what a big relief. Thanks guys Cheers
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