How are you guys doing it? Lay the glass on bamboo and spray through or spray bamboo and lay the glass out? How do you keep from getting wrinkles in the glass?
My blank is shaped and I have a buddy coming over tomorrow to help bag on the bamboo…
I've done extensive composites work on small r/c aircraft wings, including bagging, but I haven't done much composites work with surfboards yet. That said, one trick we had to lay glass out flat was to 3m77 it to a sheet of waxpaper first. Then spray the front of the glass, then lay it out on the surface, then remove the waxpaper and laminate the glass to the surface material. My two cents, others here have much more Compsand experience.
Spray the Boo lightly,roll out the glass, and massage the glass smooth then cut the outline.
Good luck!
why bother with cloth backing?
why bother spraying it on?
cut the outline in to the bamboo, cut the cloth to fit, wet the cloth and then flip the whole lot over on to the board and in to the bag.
KISS
Will the resin bond the glass to the bamboo?
We’ve only laminated glass directly to the wood veneers with a very dry layup. We did a bunch of sheets with a layer of polyply between each sheet and then weighted down the whole thing between sheets of plywood.
For bagging veneers, we lay out the glass on the veneer, then apply the epoxy to that and wet out the whole thing. I like to use a squeegee to move the resin around, but you can brush it on, or use a roller. Once the glass is wet out, we lay the blank onto the glass then turn it over to smooth it out and straighten it up. Tape it in place, then wrap it with a sheet of poly, then stick it in the bag. We use about 6 oz of resin for one side of a 7’ - 8’ board. You can use a brush and put a little of the resin on the blank if there’s extra. Bamboo doesn’t absorb resin, so you don’t use as much as you would with other woods.
Silly has several videos on youtube showing the whole process that he uses. It’s a little different because he wets out rolled up glass in a small container then applies it to the board. Once the glass is straightened out he lays the veneer over that. I think he gets a higher glass to resin ratio that way, but you have to be able unroll the glass just right.
ditto afoaf.
I like to squeege a bit of excess resin to the edge so when I pull it out of the bag, I have a resin fillet that I can chamfer down with the micro plane as opposed to just wood with some possible dry cloth beneath to plane, if you don’t roll the edges into the foam.
In the WMD thread, it sounded like 77ing 2oz to the back of the boo was the standard way to go. Is that not the case anymore? I plan to roll the edges into the foam w/ a roller while its in the bag.
Hello those that are trying to make an simple task difficult.
1) layout the veneer god side up
2) draw you cut out shape
3) flip back over and spray with super 77,..... a 3M product
4) roll your cloth on to the sprayed veneer. Carefully work it like you would put a giant decal down. If you get a wrinkle no big deal...but you shouldn't it's not that hard. And if you go slow enough you can catch it before it gets out of hand
5) flip veneer & glass back over and cut out your template....with a razor blade...not scissors. A razor blade will make a very clean cut. cut through the wood and glass. So good that you won't need pinlines. Just take your time like a cut lap.
6) flip back over and put just enough epoxy on so there are lots of dry spots, but everything is covered with epoxy........meaning it's ok to have white areas. what you don't want is the cloth saturated so much the cloth is completely wetted out and soaking through the wood.. If you do that you used too much epoxy and are just wasting materials. It's just glue, nad no one's going to see it anyway.
Ok enough secrets
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