Darryl Keil Last Activity 2025-05-12 11:03 AM
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Kelly Almond

Posts: 14

Joined: 2006-10-04

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Subject : Veneering inside radius
Posted : 2009-02-23 1:35 PM
Post #35296
I know this subject has been covered but I cannot remember the answers posted.
I want to veneer over both sides of a curved door that I built out of bending ply. My question is how to assure even and adequate pressure on the down side, the side between the door and the curved form. If I don't get it placed back on the form exactly as it came off, the small differences might causes pressure voids, and inadequate bonding.
I remember some of you suggested a material to put between the form and veneer. Was it vacunet, carpet padding or some thing like that ?


 
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Earl

Posts: 75

Joined: 2003-12-04
Location: Pensacola FL

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Subject : RE: Veneering inside radius
Posted : 2009-02-23 1:57 PM
Post #35297 - In reply to #35296
Kelly, this is the reason I always glue up the finished door at one time. Chances are your door has relaxed slightly which may or may not be a problem, at least for the form side veneer. One thing I've used for taking up "slack" is the closed cell foam that is made for underlayment of Floating wood floors. It has just enough give and has a slick surface that glue doesn't stick to. It's about 1/16" - 1/8" thick.

Believe me, it's not that difficult to glue as many as 7 layers at a time. If you take note of the pics in the link, I've marked the centerline of everything to help with alignment. This a page I started and never quite got around to finishing up, but the pics will tell the story.

http://earlkelly.com/CurvedVeneerPanel.htm

Earl


 
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Darryl Keil

Posts: 1454

Joined: 2003-05-22
Location: Maine

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Subject : RE: Veneering inside radius
Posted : 2009-02-24 12:34 PM
Post #35298 - In reply to #35296
Kelly,

I have done many curved panels on a form and then put them back in to apply the veneer. I just put registration marks on the panel and form so it goes back on in the same exact spot. If you want a little extra cushion between the panel and form use a sheet of 1/16" natural gum rubber.

You could also make a flexible platen out of 3/8" bending ply, put the grooves in it like a regular platen, and use this underneath the panel and veneer. This flexible platen will suck up to the exact radius of the panel. You can also use a bleeder fabric like EvacuNet to do this as well.

Darryl Keil


 
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Don Stephan

Posts: 825

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

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Subject : RE: Veneering inside radius
Posted : 2009-02-24 8:00 PM
Post #35299 - In reply to #35298
If using vending ply as described in the last paragraph, would that necessitate using the vacuum bag without a bottom platen, so the bag could conform to the previously made curved door?

Don


 
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Darryl Keil

Posts: 1454

Joined: 2003-05-22
Location: Maine

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Subject : RE: Veneering inside radius
Posted : 2009-02-25 5:56 PM
Post #35300 - In reply to #35299
Don,

I'm not familiar with vending ply, is this a plywood vending machines are made of? Just teasing!

The bending ply IS the platen, so the regular 3/4" platen is removed. You run the grooves in the bending ply just like a regular platen. I do glue a small, 2"x 2" bending ply block to the back side of the bending ply platen at the location where the tube fitting goes in. This makes the platen 3/4" thick just at this spot. Holds the brass tube fitting into the platen better.

Hope this makes sense.
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