Cure Temp and time

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Cure Temp and time

Author	Message
racecomp	racecomp posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 5, Visits: 10	Take an hour to ramp up to 55/60 deg C and then hold for an hour, after that start 5 deg C every 20 mins.
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morepower	morepower posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 242, Visits: 1.2K	ECV3 (16/05/2016) Hi morepower, Upto now i have used a cure cycle with dwels of 65C for 2 hours, 72C for 1 hour, 80C for 5 hours at a ramp rate of 1C every 90 seconds. The parts are small and only 2 layers thick, i know its all about taking time to let it do its thing but if poss i'd like to lower the cure time and raise the Tg. Can you tell me is their any advantage having the 65C dwell for over an hour and how long will a last dwell of 90C take ?. Cheers! Ok. The advantages of a longer dwell will be allowing the resin to flow for as long as possible to get a good finish. I avoid speeding up a cure cycle as it could hamper the finish of the surface with the material I use. I know once it has gelled you can speed up the cure but I dont bother as I cure overnight anyway. The last sector should be reduced from 5 hours to 2 1/2 half hours but I would allow 3 hours just to be on the safe side...
	Reply Like 4
ECV3	ECV3 posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 30, Visits: 106	Hi morepower, Upto now i have used a cure cycle with dwels of 65C for 2 hours, 72C for 1 hour, 80C for 5 hours at a ramp rate of 1C every 90 seconds. The parts are small and only 2 layers thick, i know its all about taking time to let it do its thing but if poss i'd like to lower the cure time and raise the Tg. Can you tell me is their any advantage having the 65C dwell for over an hour and how long will a last dwell of 90C take ?. Cheers!
	Reply Like 3
morepower	morepower posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 242, Visits: 1.2K	ECV3 (07/05/2016) If the final Cure Temp of 80C in a cycle takes 5 hours how long will a final Cure Temp of 85C take ?. Cheers! It should be about 3 hours 45 minutes. But you need to allow for the mould to heat soak too....
	Reply Like 4
ECV3	ECV3 posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 30, Visits: 106	If the final Cure Temp of 80C in a cycle takes 5 hours how long will a final Cure Temp of 85C take ?. Cheers!
	Reply Like 3