Darryl Keil Last Activity 2024-10-10 3:42 PM
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Barry S. Redman

Posts: 1

Joined: 2005-09-14
Location: Portland, OR

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Subject : limits on laminating sandwich panels
Posted : 2005-09-14 11:18 AM
Post #32399

Hello all,

I am in the process of building a large one-piece conference table. The plans call for a boat shape design with a 2 ½” top surface 16’ x 6’6”. Originally, I was considering laminating three layers of ¾” 13 layer maple/apple plywood to form this solid top, but the weight estimates are in at around 500lbs., which would create a major challenge to move this table from the wood shop to the conference room located two stories above. I have researched some engineered sheet stock like balsa core MDF and have decided that sandwich construction would save a great deal of weight while maintaining rigidity.

My question is two parts; first, how feasible is ¾” honeycomb with ¾” plywood skin front and back? Secondly, What formulation of glue would you recommend in this scenario using a vacuum laminate situation?



 
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Darryl Keil

Posts: 1453

Joined: 2003-05-22
Location: Maine

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Subject : RE: limits on laminating sandwich panels
Posted : 2005-09-14 4:11 PM
Post #32405 - In reply to #32399

Barry,

3/4" honeycomb will work fine between two layers of 3/4" skins. Even stronger and lighter would be to use two layers of 3/4" honeycomb with 1/8" ply between them and 1/2" skins on both sides. Another option would be 1" honeycomb with two 5/8" skins.

Use a urea resin glue for the lay up.

Sincerely
Darryl Keil


 
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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : Laminating
Posted : 2005-09-14 10:07 PM
Post #32408 - In reply to #32405

Barry:

I'm curious - will you still try to make the top as a single piece if you use honeycomb?

Don Stephan


 
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Barry S Redman

 
Subject : RE: Laminating
Posted : 2005-09-14 10:24 PM
Post #32409 - In reply to #32408

Yes I still plan on one-piece. It is the weight that is the problem, not the dimensions. The honeycomb core will allow us to reduce the weight considerably. Now all we have to consider in this design is what to do with all of the red tape.


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