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111mattin111	111mattin111 posted 10 Years Ago HOT Topic Details
Group: Forum Members Posts: 67, Visits: 910	OK need a little help I've done a quick video as well to show what im on about I've vaccum bagged my lay up and got absolute vaccum, but when I do a drop test leaving it 15min when I come back to it turn the pump on and release the clamp it starts pulling vaccum again then after a few minutes it pulls absolute vaccum again without touching anything, Is this normal or is something causing it to do this? I don't want to infuse it if airs getting into the bag Thanks Paul
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111mattin111	111mattin111 posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 67, Visits: 910	http://s200.photobucket.com/user/rb200/library/?view=recent&page=1 Edited 10 Years Ago by 111mattin111
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111mattin111	111mattin111 posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 67, Visits: 910	Well been over the bag a million times and can't find the leak, I can get it to pull vaccum but once it's clamped there's a very small leak some where, I didn't think it would pull full vac if there's a hole any where? Looks like I'll have to rebag it?
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carbonfibreworks	carbonfibreworks posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 292, Visits: 4.5K	Hi Good housekeeping helps regarding leaking bags so make sure you bagging material is stored in a way that it wont be damaged, also when you are cutting the bagging material make sure you have a clean and clear working area . If you cant find a leak within 20 minutes re bag the mould it saves a lot of frustration when your starting out , also don't rule out a leak on the mould itself . Regards Chris Edited 10 Years Ago by carbonfibreworks
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111mattin111	111mattin111 posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 67, Visits: 910	The vac bag has been stored it a sealed bag out of the way, Would it still be able to pull full vac if there was a leak in the mould? How would I go about finding a leak in the mould?
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carbonfibreworks	carbonfibreworks posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 292, Visits: 4.5K	Hi One way to check it is envelope bag the mould but make sure the back of the mould has been sanded to remove any sharp areas, you can also cover the back of the mould with breather fabric to reduce the risk of damage when envelope bagging. Regards Chris Edited 10 Years Ago by carbonfibreworks
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111mattin111	111mattin111 posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 67, Visits: 910	Not sure I'd be able to envelope bag it due to the size and weight of the mould, Hmmmm not really sure what to do Edited 10 Years Ago by 111mattin111
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carbonfibreworks	carbonfibreworks posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 292, Visits: 4.5K	Hi Just try re bagging first. Regards Chris
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*VVS*	*VVS* posted 10 Years Ago HOT Post Details
Group: Moderators Posts: 226, Visits: 334	Ive found most leaks are around the tape and especially at the vacuum intake and outlet at the bag seal. I'm the king of micro leaks and eventually you have to admit defeat and re bag it. if you can get a second person to watch the gauge you may be able to find the leak by slowly working over the bag while they watch as the speed of gauge drop changes as you touch it.
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Matthieu Libeert	Matthieu Libeert posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	to answer your question if you do not have a digital vacuumreader you can get "full" vacuum on the gauge with a leak. But if it drops after a few hours, like you say, you dont have fully sealed bag and you have to keep searching or rebag Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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