|Forum topic by ajthomas5009||posted 05-17-2015 06:57 AM||1092 views||0 times favorited||6 replies|
05-17-2015 06:57 AM
Hey all I wanted to get some opinions on using 2×4’s and 3/8” bolts as clamps for face laminating large sheets of plywood before I do it. I need to replace my sons basketball back board with was previously a stationary pole and 3/4” plywood that came with the house. I looked around for a decent on and found out I could make one for have the price have a nice piece of birch ply left over all while paying for it with general funds instead of shop funds.
The old back board could have been stiffer so I figured 3/4 birch ply with a 1/4 oil hardboard front and back would take care of that. But then that left me with the problem of laminating (3) 54”x42” pieces of sheet goods together. I know the best way is glue and screws but I didn’t want to see the ugly screws everyday, plus I feel that all the counter sunk screws would allow the elements to deteriorate thing sooner. So I was heavily leaning towards glue only.
The problem with that is with out an industrial press the only ideal way is to use a an extra sheet of plywood on the front and back with lots of cauls. Well I wasn’t about to spend a Hundo on clamping plywood, so my plane was to just do it with plywood and cauls. But instead of playing teatertoter with clamps and cauls I figured making an easier to use reusable jig was the way to go. So I got a bunch of 2×4x12’s and cut them to 4/5 feet, drilled a hole and used a. Coarse 3/8’ hole. Do you think this would be sufficent clamping force. My thoughts are 6 sets of clamps/cauls plus 2 3-4 more in the opposite direction. I figured I would start the cauls 4” in and the every 8-10” and also tighten the edges with reg clamps. Hay anyone ever attempted this before?
For a finish I figured 3 coats oil varnish blend followed by 3 of wiping varnish. This way reapplication wouldn’t be to labor intensive down the road
-- Sometimes you're flush and sometimes you're bust, and when you're up, it's never as good as it seems, and when you're down, you never think you'll be up again, but life goes on.