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Vari Preg Curing Time
Vari Preg Curing Time
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scottracing
scottracing
posted 11 Years Ago
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Hi there
Im looking at making some automotive and bicycle parts and I would like to use the vari-preg system as I have a laboratory oven im converting to cure composites.
In the video you say that curing time for the prepreg is 8 hours at 80°c, for me thats a bit too long as I dont want to leave parts curing overnight, especially if i get a bag burst.
Ive looked on the site but may be not hard enough, can the cure cycle time be reduced if the temperature is increased? and do you have to have a special ramp and dwell period during the cure if so?
Many thanks
Garry
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scottracing
scottracing
posted 11 Years Ago
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Thanks for the tips guys, morepower can you tell me what prepreg you are using? I need to fins a suitable supplier here in germany as the low temp cure prepreg isnt that suitable for delivery outside of the uk
The oven that I'm using can be programmed for ramp rate and a dwell period so a bit of experimenting isn't too much of a problem, im not sure if i will be using epoxy block or ali for tooling or possibly the easy composites mould material. It will mainly be down to price and size on that aspect but of course i will have to account for heat soak during the cure.
Quality of the parts is of course paramount, but Im going to be making the parts outside of work at a friends unit and I don't want to wait till the next day to wait for the cure to be finished.
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Matt (Staff)
Matt (Staff)
posted 11 Years Ago
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Hi
Garry
,
Our
Easy-Preg
and
Vari-Preg
systems are not
low temperature
cure prepregs (I would say a low temp cure prepreg is widely considered to be around 60'C); really they're reasonably typical of a medium cure temperature prepreg and are specifically designed to have long out-lives. We send the prepregs all around the world and Germany, being a near neighbour, is certainly very realistic and cost-effective for us to dispatch to. I don't know of any suppliers or manufacturers of OOA prepregs with a similar performance in Germany.
For a quicker cure cycle that will certainly yeild
perfect
results using our
Easy-Preg Prepreg OOA Surface Layer
I would suggest the following:
1hr @ 50'C
1hr @ 60'C
1hr @ 70'C
1hr @ 120'C -- > Cool to ambient.
This is a 4hr cure cycle which will give you flawless, pin-hole free results and achieve a cured laminate Tg of 120'C too. You will of course need tools that can take (and have been prepared for) 120'C.
I hope this helps, all the best,
Matt
Matt Statham
Easy Composites / Carbon Mods - Technical Sales
Tags
cure cycle
easy-preg
faster
prepreg
pre-preg
Edited
11 Years Ago by
Matt (Staff)
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Vari Preg Curing Time
scottracing
-
11 Years Ago
Speeding up cure time can lead to more pinholes.. You need to know the best temp for the resin to...
morepower
-
11 Years Ago
The reason for the low temperature is as morepower suggests. For surfacing pre-pregs we tend to go...
Warren (Staff)
-
11 Years Ago
Thanks for the tips guys, morepower can you tell me what prepreg you are using? I need to fins a...
scottracing
-
11 Years Ago
Hi Garry , Our Easy-Preg and Vari-Preg systems are not low temperature cure prepregs (I...
Matt (Staff)
-
11 Years Ago
Hi Matt Thanks for the info, Im used to working with prepregs in motorsport and aircraft use and...
scottracing
-
11 Years Ago
Hi Garry, if you are referring to the Unimould system then the answer on a 120 degree cure would...
Paul (Staff)
-
11 Years Ago
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