Does anyone have experience using a vacuum bag to attach wood rails/parabolic stringers to a board? I usually use clamps to attach wood rails to a blank but thought it may be easiar with the vacuum bag. Getting nice tight clamp pressure is tricky in the nose and tail due to the curve of the outline.
The wood rails/parabolic stringers I am attaching are pre-bent/laminated 1" thick paulownia wood.
If you have tried this or know of a better way I would appreciate the tips.
Don’t think wood would clamp properly under atmospheric pressure readily for the curves tip and tail of a typical board outline, at least not in meaningful thickness imho…
If you use a rocker bed/table you could align pegs on the surface with which you “clamp” the rail material in place. This is a trick some snowboardbuilders use for attaching the steel rails to the polyethyleen base and core layup.
I’ve been putting dherrywood/balsa rails on my last 15 boards and the last one was cherry/pawlownia. I use blue masking tape to hold the middle on then use, 15 to 20 foot, strips of 1" wide tire tubing to wrap around the board and hold the rails on till the GG cures.
Get an old blown out car tube free from a tire store. start cutting spiral in 1" width around and around. A big truck tire works the best. Easier and better control than a bag. I use bags too but usually just to get the deck and bottom on.
Tried to add picture of one of my boards with the rubber clamps but not sure how with the new system… any help?
Hi, yes have done this method for a hollow board rail build up , as pictured below. Also used the same technique to glue my Alaia blank up with recently, works very well, it pays to have quite thick inner tube which is more resistant to twisting and you can always add a little masking tape to the spots where it does not clamp together but it should work really well if you have plenty of tube and space the tube close together along the curve.
post some pics of your progress, Id be interested how it goes!
If were talking about EPS surfboards here then I don’t understand what the big deal is. If its a an HWS then it’s another deal.
With EPS you start out with a square blank right? OK, so when we cut the inner piece we have cut off right…right. Ok…just do one side. So now we have 1 cut off and a half blank. As long as you didn’t mangle the cut off you can sandwich you parabolic or hd rail between the cut off and the blank. Take a 1 x 3 x 1/2 x whatever the length is, and use that too add pressure to the outter edge of the cutt off piece. This will leave the rocker in the proper position while letting you use less clamps, but get more pressure over the foam. Let dry, do the other side
The important thing here is that you didn’t mangle you cut offs
too many clamps, tape, rubber bands etc just drives you crazy. I even think vac bagging this might be a bit overkill.
ask danny hess. he seems to have production wired. send a robot cocaroach with mini video camera into his workshop. find out how he does it and patent it in australia, claim u invented it and them sue him