vaccum bagging dramas

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vaccum bagging dramas

Author	Message
JasonFL	JasonFL posted 6 Years Ago HOT Post Details
Group: Forum Members Posts: 51, Visits: 707	The way I was thought for Resin Infusion If the bag loses no more then 1” of vacuum in on hour the bag is sealed (I no longer do it this way). For others theyll do a full 1 day leak test for 1” loss. Myself, I now check my bag with an ultrasonic leak detector, then wait 1 hour, if I lose any vacuum I recheck the bag, and repeat the 1 hour leak test. My pump does the same thing as yours. I use two ball locks depending on what I’m trying to accomplish. One ball lock cuts the vacuum pump off from the reservoir and bag. The other cuts the bag off from the Reservoir and the pump. For you a simple setup would be a ball lock directly off your pump, and then a vacuum gauge directly after the ball lock on your vacuum line. Shut the ball lock down, and if the gauge loses vacuum you know your bag is not sealed. Jason
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igs_au	i igs_au posted 6 Years Ago HOT Post Details
i Group: Forum Members Posts: 9, Visits: 67	+x oekmont - 5/23/2019 5:12:08 AM You could simply clamp the hose. And if the hose flattens under vacuum it's probably the wrong hose. If you think you have an ok sealed bag, it probably isn't. Especially as beginner you should definitely do a drop test or some other sort of test, because bagging is usually not as straight forward as most people think. it's a thick silicon transparent one from hardware store. The one on the EC site is not more expensive, so I think it's very similar. I got this special sticky vacuum bagging tape, specifically for that and on top of that duct taped it with isolating duct tape. And vacuum bag film from the composite store as well. Not just some plastic bag from the supermarket. How do you do this test? I watched like a million youtube videos. They all just smack duct tape on and go ahead. btw thank you all for advise. I really appreciate.
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oekmont	oekmont posted 6 Years Ago HOT Post Details
Group: Forum Members Posts: 550, Visits: 27K	You could simply clamp the hose. And if the hose flattens under vacuum it's probably the wrong hose. If you think you have an ok sealed bag, it probably isn't. Especially as beginner you should definitely do a drop test or some other sort of test, because bagging is usually not as straight forward as most people think.
	Reply Like 2
igs_au	i igs_au posted 6 Years Ago HOT Post Details
i Group: Forum Members Posts: 9, Visits: 67	+x Fasta - 5/23/2019 1:06:04 AM +x igs_au - 5/22/2019 10:54:20 PM Hi all, I'm making a carbon fiber part with a basic bend, no dramas there. All parts sorted. I've got a vacuum pump, basic oil based. It creates vacuum alright, but when I switch it off, air comes back into the bag and no more vacuum. It's a bit frustrating really. Should I just keep the pump running until the whole thing at least starts to cure? I've got the bag sealed ok, I think, and the connector, which I made myself, looks solid. When the pump is running, you can see that the pipe is flattened, sucking all air out. and when I switch the pump off, the pipe fills with air again. Very frustrating. Any advice would be great. Some pumps will run backwards when switched off so that lets go of the vacuum. I think most people leave the pumps running, I do. I also have a one way valve at the pump so it can not run backwards either. ah thank you. I thought so, Is there a place I can get a valve like that? I did order a cut off valve at the EC today. See how that goes
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Fasta	Fasta posted 6 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	+x igs_au - 5/22/2019 10:54:20 PM Hi all, I'm making a carbon fiber part with a basic bend, no dramas there. All parts sorted. I've got a vacuum pump, basic oil based. It creates vacuum alright, but when I switch it off, air comes back into the bag and no more vacuum. It's a bit frustrating really. Should I just keep the pump running until the whole thing at least starts to cure? I've got the bag sealed ok, I think, and the connector, which I made myself, looks solid. When the pump is running, you can see that the pipe is flattened, sucking all air out. and when I switch the pump off, the pipe fills with air again. Very frustrating. Any advice would be great. Some pumps will run backwards when switched off so that lets go of the vacuum. I think most people leave the pumps running, I do. I also have a one way valve at the pump so it can not run backwards either. Fastacraft Facebook page
	Reply Like 3
igs_au	i igs_au posted 6 Years Ago HOT Topic Details
i Group: Forum Members Posts: 9, Visits: 67	Hi all, I'm making a carbon fiber part with a basic bend, no dramas there. All parts sorted. I've got a vacuum pump, basic oil based. It creates vacuum alright, but when I switch it off, air comes back into the bag and no more vacuum. It's a bit frustrating really. Should I just keep the pump running until the whole thing at least starts to cure? I've got the bag sealed ok, I think, and the connector, which I made myself, looks solid. When the pump is running, you can see that the pipe is flattened, sucking all air out. and when I switch the pump off, the pipe fills with air again. Very frustrating. Any advice would be great.
	Reply Like 2