Hi Sways,
First Build of a kiteboard with a friend, we have a problem with the veneer pressing, maybe you guys can help ??
the room is down in a cave, maybe a little bit humid, and a bit cold (its winter in europe).
Board: 136cm x 38cm x 0,9 cm approx.
Construction: Several sheets of spruce Wood veneer pressed together with wood glue. Then aimed to glass very simply with glass and epoxy.
Basic Rocker table with 4mm Plywood as base,
put veneer sheets + woodglue on it (board core),
put another 4mm ply sheet on top of veneer (just to press everything down, not part of the board),
press down. (like a sandwich).
The problem that happened: we pressed 3 sheets of veneer, left it overnight, look what happened =( . See the pictures attached.
The sheets glued together, but instead of staying flat, it had a wavy form, the difference between the up / the peak and down of those waves is pretty big, 0,5 -1 cm ! Since we put tons of pressure, evenly distributed, everything pressed flat / there was no room for moving, and the ply from the rockertable stays rigid, we want to know what caused the veneer to wave / rifle.
Our Hypothesis: We put wayyy too much wood glue.The water from the glue caused the veneer to shrink /deform, the pressure from the water entering the wood cells exceeded the clamping pressure of the press (you know like when a seed / root grows through the concrete on the street). That caused this wavy-ness.
We then did a test pressing with two very small pieces of veneer but put way less glue. it pressed nice evenly and its flat .See the last 2 pics.
You guys had same experiences ? What are your hypothesis?
Thanks !!!
Gabriel