Darryl Keil Last Activity 2025-09-09 11:09 AM
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Tim

Posts: 35

Joined: 2007-06-26
Location: Baltimore MD

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Subject : 1/8" bending ply as caul?
Posted : 2009-07-01 12:44 PM
Post #35588
I am gluing two ply cherry face veneers over a 2 X 3/8" bending ply ( 3/4" ) core, 16' radius, 42" L X 25" W. The core faces are pretty clean, but I have had better luck with a caul vs. just the bag. I am thinking of one or two pieces of 1/8" bending ply as a caul. Would one piece be enough to give uniform pressure?


 
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Earl

Posts: 75

Joined: 2003-12-04
Location: Pensacola FL

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Subject : RE: 1/8" bending ply as caul?
Posted : 2009-07-01 1:46 PM
Post #35589 - In reply to #35588
Tim,

16' radius is almost straight, in the amount of width you're gluing up, so you could probably even use 1/4" melamine for a caul. Just test it to see how easy it conforms to the form. I've used the 3/8 bending ply as a caul for as tight as 7" radius.

I believe the 1/8" would be better than no caul, but prefer something thicker.

Earl


 
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Enrico Konig

Posts: 74

Joined: 2006-01-06
Location: Vancouver, BC

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Subject : RE: 1/8" bending ply as caul?
Posted : 2009-07-01 3:03 PM
Post #35590 - In reply to #35589
I normally use 1/4" vinyl-coated mdf as a caul, and it will bend to even a 20" radius. Urea resin sticks to this stuff much less than to melamine or any other coated panel product I've found so I'm able to re-use cauls over and over. And it's inexpensive. For tighter radiuses, I have used 1/8" bending ply wrapped in plastic and have not had any problems whatsoever.

I don't think you should ever press without a caul, as you're just asking for problems.
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