Keith Newton
Posts: 4
Joined: 2004-05-25
Location: Little Rock, Arkansas
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Miahael,
That depends a lot on your choice of veneer. there are lots of variables that factor into this. Some woods are very flexible, and others are quite brittle. If you already have the veneers, or any veneers test to see how far you can bend them before they break.
Daryl's sugestion is a good one, another tip would be to use a platen of something like plastic laminate, or backer sheet. I try to match the stifness relative to the bending radius. if some of your scrim face parts have their grain across the bending axis, the corners may wont to lift, this will give more sq. inches of pressure to those spots. If you don't have enough vacuum to pull the platen down all of the way to the ends, try to have a board/caul and clamp ready to apply to the outside of the bag.
Also I like to push the platen down ahead of the vacuum drawing it to keep the bag from getting sucked under the end of the platten, and veneer.
Also for the second ply make sure that the grain is running with the axis of the cylinder, or column, and I would choose a wood that is light in density, and good flexiblilty on that plane. If it has a low crush factor, then maybe it won't stress the first glueline, and pull apart the scrim. I am planning on hosting a workshop on this topic in a couple of months.
Let us know how this turns out, and good luck,
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