What is your technique to close the vacuum bag ?


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Jess8bit
Jess8bit
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I've just seen the video Fred, thank you for pointing me toward it. It's really tempting, sure I will give it a try soon !!
Eventually, I will not select the fastest method, instead I'll prioritze the method that decreases the risk of bagging leak ! Smile that's what really causes pain in the ... Blush
fgayford
fgayford
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Jess8bit (17/06/2013)
Fred, I never thought about doing it this way, I do it the EasyComposite way (cause I wen to the training sessions BigGrin). So, why not, but I think your method would be difficult for a mould which is not square-shaped (if I well understood your way). In my case unfortunately, the flanges have not been made rectangular (not a good idea, for sure, as it makes all things more difficult). Bu I'll think about it. Thank you Fred.

Warren, you're right, the modl is small, I should try it like you say, maybe with a piece of breather below the mold (to avoid scratching the bag).

But, you're not answering the question about the pleats ;-p  What if it's a big mold ? Smile


Actually it works on any shaped mold just as easy as your mold. If you search John Burns making a carbon fiber part on youtube he demonstrates the technic. The moment I saw it I knew I had arrived. I just hate doing it the other way its just so much harder. (But thats just me)
Fred

Jess8bit
Jess8bit
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thank you Warren Smile
Warren (Staff)
Warren (Staff)
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If i envelope it, then i close it at one end against the seam of the bag (the lay flat tube edge) as i just run gum tape along bottom and over seam, so when you close it, you are closing gum tape on gum tape so no possibility of creases etc.

When bagging off the flange i do a large pleat in the middle and shut it on the pleat.  Doesnt matter if its out as the pleat just soaks up the excess bag.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
Matthieu Libeert
Matthieu Libeert
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Never thought of that Fred, Quite a good idea! Will do this on my next project Wink

Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com




Jess8bit
Jess8bit
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that'd be absolutely usefull for many of us I bet.
Smile
wozza
wozza
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If I get time I will do a short video showing how I do it. May make more sense that wayWink I am camera shy though BigGrin

Warren

Carbon Copies Ltd
Edited 12 Years Ago by wozza
Jess8bit
Jess8bit
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yeah I knew it would have been hard to describe, but I think I understood. I'll have to practrice a bit but I feel confident about it. it's good to have directions, cause sometimes I struggle with the last centimeters of bag and tape and it ends in a mess which is leaks prone.

Thanks for your time !!! Smile
wozza
wozza
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Ha Ha you are right I did not answer that questionSmile

Ok. I close the bag with a big pleat in the middle, quite a bit bigger than what is needed to close the bag. Peel back the backing off half of the pleat. Then lay it down flat the other way on top of the gum tape on the mould. So backing to backing. Starting from the corner stick the bag to the gum tape including the pleat. Now lift up the pleat to the vertical position. Peel off the backing from the rest of the gum tape including the pleat. Working from the other corner stick the bag to the gum tape working towards the pleat. You will get to a point where the bag is tight put you still have gum tape left. Now start sticking the pleat to the gum tape on the mould, so going back towards the corner you just started from until the bag is closed. Job done.
Hard to describe in words so I hope that makes sense.

Warren.

Carbon Copies Ltd
Jess8bit
Jess8bit
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Fred, I never thought about doing it this way, I do it the EasyComposite way (cause I wen to the training sessions BigGrin). So, why not, but I think your method would be difficult for a mould which is not square-shaped (if I well understood your way). In my case unfortunately, the flanges have not been made rectangular (not a good idea, for sure, as it makes all things more difficult). Bu I'll think about it. Thank you Fred.

Warren, you're right, the modl is small, I should try it like you say, maybe with a piece of breather below the mold (to avoid scratching the bag).

But, you're not answering the question about the pleats ;-p  What if it's a big mold ? Smile
GO

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