Darryl Keil Last Activity 2025-09-09 11:09 AM
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Doug Wisse

Posts: 2

Joined: 2004-01-27
Location: Oak Island, NC

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Subject : Mitered corners
Posted : 2004-01-27 4:11 PM
Post #31235
I'm trying my first veneering project and am building a chess board using maple and teak. I've put a 1" border around my squares with mitered corners, making the board size 20" sq.. I used 3/4 MDF as a substrate and cold press veneer glue, I also taped all the joints. I don't have a vacuum set up yet so I've made a mechanical press. My problem is that my border of teak, has apparently drawn in enough moisture to open up the miters on the corners. Or, it could be that the squares swelled cross grain and pushed the corners apart. At any rate it looks pretty ugly..... I'm wondering if I should put the border on as a secondary process or what? Thanks before hand for any help or advice.


 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: Mitered corners
Posted : 2004-01-28 7:47 PM
Post #31239 - In reply to #31235
Doug,

You really should not have had problems with the teak borders. I have done many veneer tops like this without any difficulty.

I would stay away from any PVA glue when pressing this kind of project. There is too much water in these glues which can contribute to your problem. I assume you had the miters well taped with veneer tape. If not that would be trouble.

There is really no need to put the border on in a seperate operation. Just switch to a urea resin glue or polyurethane and make sure the miters are well taped. That should do the trick.

Sincerely
Darryl Keil


 
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Doug Wisse

Posts: 2

Joined: 2004-01-27
Location: Oak Island, NC

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Subject : RE: Mitered corners
Posted : 2004-01-28 8:27 PM
Post #31242 - In reply to #31239
Thanks for the reply Darryl. I thought that might be my problem, with too much water in the glue. I have some West systems epoxy on hand and am wondering if that might not suffice. I realize there are problems when vacuum bagging with epoxies, as they leach thru the veneers. Being I'm mechanically pressing, might that not be a problem? I'm a little concerned with the oils inherent in the teak and not getting a proper bond. I wipe down with acetone prior to glue up, but I haven't used urea resin glue with this type of process so I'm a little unsure. I did salvage my first attempt by cutting out some of the corner and putting in some chevrons, looks like I planned it... Thanks for your help, it is nice to have someplace to get some answers to these types of questions.


 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: Mitered corners
Posted : 2004-01-30 8:17 AM
Post #31244 - In reply to #31242
Doug,

Epoxy being what I call a "high saturator" will bleed through a lot with machanical pressure as well. Urea resin works very well with oily woods, so you can use either one.

Sincerely
Darryl Keil
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