Hello Brent,
If you need a vacuum pump, you should give ebay a try. You will be
surprised how much stuff there is for sale on ebay. I am building a CNC
foamcutter and have been able to buy most of what would have been my high
dollar linear motion components for a good deal on ebay. You can even find
kevlar, fiberglass and carbon cloth for sale as well. If ebay does not
work, try WWW.mcmastercarr.com. They have just about everthing imaginable
from tampon dispensing machines to air compressors. You name it they
probably sell it. Their prices are fairly good, and usualy better than
grainger. www.carb.com has fair prices on materials. As far as the bags I
use clear visquine material. You can buy it at home depot and it is about
36" or so wide and sold in a roll of x amount of feet. I lay a sheet of it
out and then place my mylars on top (toward the bottom 18" or so)and go to
town with the layup. When I fold the other mylar over the core, I then put
in my peel ply as well as my breather cloth. I then fold over the remaining
18" of plastic over the whole thing to see where the fold line will be. I
then fold it back open, and caulk around the plastic. now the vacuum tube is
placed in the caulk with the opening about 6" or so away from the caulk. I
lay a piece of paper towel between both sides of the vacuum opening to keep
the vacuum from sealing itself off during suckdown. I add a bit extra caulk
were the tube enters the bag and then fold over the 18" piece. Run your
finger along the bead to seal the bag and turn on the pump. The best part
is you can just toss the bag when you are done. You can even use a piece of
visquine as breather cloth if you poke it with enough holes. I use a roller
with pokers on it to do this or you can make a block with a bunch of nails
in it and poke the plastic with it. Either way works. One suggestion is to
buy a pump with a vacuum head at each end that way you don't need to deal
with any sort of valves or manifold to do 2 wings at once ie. left and
right. Also make sure your table is good and flat without any twists.
Once you learn to bag, the cost of the hobby goes down a little, but you
tend to spend more time in the shop. If your married, than good luck. When
you start out don't try to make a hand launch, but rather start with some
sort of slope ship as your first wings will be a bit on the heavy side.
Just like anything, the more you do it the better you get.
Hope this helps,
Marc Webster
>From: "Douglas, Brent" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: [RCSE] more foam / bagging questions
>Date: Wed, 4 Apr 2001 16:05:44 -0400
>
> ok, so now i am jamming w/ cutting cores .... i want to look into
>bagging.... what is the easiest way, and what is the best way?
>
> i have checked out the packages people like ACP, CST, nesail sell,
>but what else have you tried? i am putting out feelers for vacuum pumps,
>but has anyone found a good source?
>
> any help would be appreciated,
>
> brent
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