posted
...a 7'circle made of two piece of 3.5' x 7'x 1/8" dibond together ? and what adhesive would you use ? I plan on using a 12" x 7' strip of dibond on backside..half on each side to hold them together. I'll glue the strip to one half first, but not sure how to clamp the second side so it's tight against the first side till glue cures. This circle is a large "saw blade" and will be adhered to a larger 5/8' mdo back panel. There will be large hdu gilded ltrs attached to saw blade panel, so not all of the middle seam will be seen...(too bad I'm not using smalts to cover the blade...that would certainly hide it)
posted
I've used polyurethane glue before, and it stuck incredibly well. (like gorilla glue-it swells as it absorbs moisture from the air & cures)
You need to scuff the surfaces to help adhesion or 'tooth' first.
One sign I glued like that I retrieved 2 years later when the business changed hands, and now it's a machinery cover here. It's taken a LOT of abuse, but the sheets still cannot be separated!
-------------------- "Stewey" on chat
"...there are no limits when you aim for perfection..." Jonathan Livingston Seagull Posts: 7014 | From: Highgrove via Toowoomba, Queensland, Australia | Registered: Dec 2002
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posted
P.S. I did a globe of the world a few years ago, and instead of having the sheets join in the centre, horizontally, I put the full sheet in the centre, and had the upper arc and lower arc for the north & south pole parts cut to sit top & bottom. I also arced the joins like a banana, so the joins vaguely resembled lines of latitude, instead of being straight. It looked quite good - and better than an equator line, I thought.
-------------------- "Stewey" on chat
"...there are no limits when you aim for perfection..." Jonathan Livingston Seagull Posts: 7014 | From: Highgrove via Toowoomba, Queensland, Australia | Registered: Dec 2002
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posted
To answer your question....just use weights.
-------------------- John Arnott El Cajon CA 619 596-9989 signgraphics1@aol.com http://www.signgraphics1.com Posts: 1443 | From: El Cajon CA usa | Registered: Dec 1998
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posted
Vance, Step one would be to glue the strip to the first piece of Diabond like you said.
When you go to glue the second piece, it might be wise to use some scraps of wood to help secure the two until the glue dries and prevent spreading. Maybe use and old 4x8 to screw into?
When Gorilla Glue is 'active' it foams up a bit so you will want everything to be secure. (horizontally & vertically)
John is right, you'll want to put some weights on it as well to prevent any vertical movement while it dries.
-------------------- Shirley Carron Black Sheep Designs 184 John St. N. Arnprior,On.,Canada shirleyc@magma.ca 613-623-7053 Posts: 503 | From: Arnprior, Ontario, Canada | Registered: Nov 2001
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