Hi, I am in the process of making a blackbean box with huon pine veneered lid 500L x 200W x 120H. The base and the lid are both made of 1.0mm thick veneers I bandsawed and glued to a 4mm plywood base. The 6mm thick base is glued into a rebated groove 6mm from the bottom of the box, and the 6mm thick lid is dropped into a rebated top edge and glued, so the box is glued top and bottom. The corners are mitred with keys right down to the inside corners. I put a 1mm hole in the base to allow for expansion and contraction. Pics below show the box just after hinges fitted, no finishing yet. Inlay on the lid is Queen Ebony I resawed, and the keys are made of Qld Silver Ash.
After I bandsawed the lid off 30mm from the top I checked that the box and lid met nicely, I fitted the SmartHinges after some difficulty with shearing off a steel #3 5/8" pilot screw. Of course it was the last of the 8 hinge screws to be fitted.
The problem is that I found the next day that the long box sides had bowed outwards by 0.7mm. The lid sides did not, so I have a nice lip in the box at the lid join, on the front and rear. The corners all still align nicely.
The box was made here in currently very hot and humid tropics, with shed temperatures 43 degC, and is destined for the cooler climes of Sydney.
Can anyone please suggest any reasons as to why the box sides expanded outwards after the lid was cut off? And how to fix the problem? All ideas and suggestions welcomed.
NeedleBox_01.jpgNeedleBox_02.jpgNeedleBox_03.jpgNeedleBox_04.jpgNeedleBox_05.jpg
After I bandsawed the lid off 30mm from the top I checked that the box and lid met nicely, I fitted the SmartHinges after some difficulty with shearing off a steel #3 5/8" pilot screw. Of course it was the last of the 8 hinge screws to be fitted.
The problem is that I found the next day that the long box sides had bowed outwards by 0.7mm. The lid sides did not, so I have a nice lip in the box at the lid join, on the front and rear. The corners all still align nicely.
The box was made here in currently very hot and humid tropics, with shed temperatures 43 degC, and is destined for the cooler climes of Sydney.
Can anyone please suggest any reasons as to why the box sides expanded outwards after the lid was cut off? And how to fix the problem? All ideas and suggestions welcomed.
NeedleBox_01.jpgNeedleBox_02.jpgNeedleBox_03.jpgNeedleBox_04.jpgNeedleBox_05.jpg
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