Vari Preg Curing Time


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scottracing
scottracing
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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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morepower
morepower
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Speeding up cure time can lead to more pinholes.. You need to know the best temp for the resin to flow through the material then get to the gel stage before you ramp up to speed up the cure time. That will take some experimenting with the material. I use a very very good OOA pre-preg which has a cure cycle with a suggested ramp speed. But for the best results I have worked out a cure cycle for my oven and my parts which works perfectly. Although it is quite different to the suggested cycle. It took me about 6 months of testing to work out the best cure cycle and breather stack. Even placement of peel ply makes a big difference so you need to have a play with a simple mould and use that mould for each test.. 
GO

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