Replies

1. 
   _mj_ | Oct 30, 2022 03:47pm | #1

   Assuming it's a chair-scale object I'd make it in 2 parts BUT, I'd leave a foot or so of alternating veneers extending past each glueup on the middle area where they will interweave in a final (flat area) glueup. Staggering the leaves might help with strength. I think it would be as strong as the rest of the assembly.

1. 
   thomasgerald | Oct 30, 2022 04:07pm | #2

   Thanks for the reply, this is a great idea. I need the edges to look pretty clean though. Couldn't the interwoven sections look quite gappy if the veneers slip out of position?

2. 
   ajg1942 | Oct 30, 2022 04:38pm | #3

   What is the width (depth as looking at photo) of the bent lamination?

1. 
   thomasgerald | Oct 30, 2022 04:49pm | #4

   The depth is 200mm.

3. 
   ajg1942 | Oct 30, 2022 06:20pm | #5

   200mm or 7 7/8"

   Not sure how much detail you need...

   I would do it with 2 maybe 3 forms...

   Form A would be for the middle flat, bottom large semi-circle radius, bottom flat, and the partial arch at the very bottom. this would be an inner form. Form B would be for the middle flat, upper smaller semi-circle radius, top flat and partial arch at the top. Form B would also be an inner form.

   I would mount (screw) form A onto a flat panel (base). I would cut 2-3 slot in the base perpendicular to the center flat section on form A . these slots are to index form B on small runners, so that it can move toward/away form A for clamping but not shift left of right. I would also make the slot all the way through the base, so that something can be fixed to the runners(fender washers??) preventing form B from lifting of the base.

   I would also use two pieces of wiggle board to support the outside of the both semi circle section. I would probably have a notch in form B where the wiggle board can tuck under and then wrap around the outside of the large semi circle and extend all the way through the bottom arc.. and a notch in form A so that the wiggle board tuck under and then wrap around the outside of the smaller semi circle and extend all the through the top arc.. may also need to attach the wiggle board in the notches so they don't move..

   I would also 8/4 cauls for the flat sections, cauls for the semi circles and the starting and end arcs.. cauls go against the outer wiggle board..

   Dance with the clamps..

   I would then start gluing up across the center flat using F-clamps in holes in Form A and clamping against upper flat of form B (probably use a caul here to not damage the surface of the form).. moving around the large semi circle clamp.. then clamp the bottom flat with caul using F-clamps from holes in Form B across the center flat. clamp bottom arc... remove the clamps in holes in form A. clamp the smaller semi-circle clamping.. clamp the top flat using a caul with bar clamp across the whole form.. clamp the top arc...

   Since the bent lamination is wide (~8") .. I would use 2 rows of clamps.. applying clamps from the top and from underneath, make sure the base does not interfere with the clamps.. so all cauls would be slightly proud of the base's edge...

4. 
   _mj_ | Oct 30, 2022 07:34pm | #6

   Wow, much smaller than I assumed... obviously not a chair. What is the total length of each leaf and how thick? How many plies?