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Anyone made their own vacuum bags?

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Forum topic by mfike posted 12-11-2010 05:07 AM 1173 views 0 times favorited 5 replies Add to Favorites Watch
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mfike

100 posts in 3127 days


12-11-2010 05:07 AM

I found a vinyl supplier that has the polished 30 guage vinyl for a really good price, so I was thinking about trying to make a bag. I have a 4’x6’ bag now, but I need to press a panel with a slight curve that’s going to be about 70” long. I know how to make one. My question is has anyone made one and if so were there any problems. Any thing to look out for. The savings are significant, but if the bag is gonna leak of course I just assume pay for a new one. Any help is appreciated.
Thanks,
Mitch


5 replies so far

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Howie

2656 posts in 2384 days


#1 posted 12-11-2010 01:48 PM

I read an article sometime back on how to make your own Vac bag, but I don’t remember where. Try googling and see what you come up with. If I remember correctly it wasn’t that big of a deal if you followed the directions carefully.

-- Life is good.

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Julian

880 posts in 2986 days


#2 posted 12-11-2010 09:52 PM

Check out joewoodworker.com. I ordered everything from his site and then used his instructions that are available for free on his site. I also built a venturi vacuum system following his plans.

-- Julian, Park Forest, IL

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mfike

100 posts in 3127 days


#3 posted 12-12-2010 12:50 AM

Yeah Julian that’s where I’ve gotten all my info as well and I too built the venturi system with his plans. Almost all the parts that I press easily fit in my 4’x6’ bag, so I don’t want to put a lot of money in a bigger bag that won’t get used often. It seems very simple to make a bag, I was just wanting to hear from someone that actually had to see if they had any issues with it.

View John Ormsby's profile

John Ormsby

1283 posts in 3198 days


#4 posted 12-12-2010 02:44 AM

The best bags are electronically sealed. You can glue the seams, but must be very careful. The bag MUST be 100% sealed. No Leaks. The glues that are used are very toxic and you need to wear a proper respirator with the correct filter. Other that that, they are quite easy to make. A urethane bag is a better choice of material in that it is stronger and more pliable. Does your supplier have Urethane? It also uses special glues to seal the seams.
There is also a proper way to fold the seam in order for it to last. It will not work too long if it is just glued flat. They need to be rolled onto each other. This reduces the stress on the seam.

-- Oldworld, Fair Oaks, Ca

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shipwright

7165 posts in 2259 days


#5 posted 12-12-2010 06:32 AM

I’m another joethewoodworker fan. My large bag is about 4’ x 7’. I made it just like the site says, sheet vinyl and pool cement. It’s been going now for 4 years and I use it almost every day when I’m in the shop. The only trick is that the glue is instant. You only get one shot so I just take the same precautions that I do with contact cement. I apply the glue, then lay everything together perfectly but with a barrier, like thin plywood, cardboard or waxed paper, then slowly and carefully slide the barrier back a little at a time. You can’t afford to get a “bubble” in the glueline. One trick would be to start a little on the big side. If it works, your bag is a little bigger than you need. If you screw up you can cut off the glued area and try again. Another thing is to have a little c-clamp and two bits of plywood handy to squeeze the folded corner.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees. http://thecanadianschooloffrenchmarquetry.com/

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