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J Hewitt
 Post subject: Bending purfling?
PostPosted: Mon Nov 21, 2011 5:29 pm 
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Cocobolo
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Joined: Fri Sep 19, 2008 11:36 pm
Posts: 184
First name: Jeff
Last Name: Hewitt
State: TN
Zip/Postal Code: 37312
Country: USA
Focus: Build
Status: Amateur
Just wondering if anyone could give me some advice about what was the cause of this? As you can see it didn't turn out that well. gaah I used Titebond III...The veneers are .020 thick...the total size is about .150 wide x .080 thick. I used a heating blanket also....did I maybe rush the bend to quick or what do ya think? I've bent the stew mac herringbone with no problem. This is my first time of making my own and bending it.
Thanks,
Jeff


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munen
 Post subject: Re: Bending purfling?
PostPosted: Mon Nov 21, 2011 8:06 pm 
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Cocobolo
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Joined: Sun Mar 06, 2011 9:52 pm
Posts: 170
First name: Bruno
Last Name: Piancatelli
Country: Argentina
Status: Amateur
I was trying to bend radial strips of wood that where about 3,5 mm wide and had no veneers atached to them.
I had success using a thin steel shim (a metal saw) to support the outer side of the strip avoiding tension on the outside to snap the radial strip.
so it was: side bender, radial strip, thin metal strip.

on your case it seems that you need to support the inside from compression instead of tension.
so you could try: side bender, metal shim, purfling.
you probably don´t need to support the outer side because the veneer is dealing with the tension generated there.

best luck!
by the way, that purf looks real nice!
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TonyFrancis
 Post subject: Re: Bending purfling?
PostPosted: Tue Nov 22, 2011 1:55 am 
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Koa
Koa

Joined: Mon Jul 02, 2007 1:22 pm
Posts: 766
Next time, you also might try gluing the outer veneers with a more heat resistant glue. Urea Formaldehyde, or Polyurethane glue.
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york
 Post subject: Re: Bending purfling?
PostPosted: Tue Nov 22, 2011 10:35 am 
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Joined: Sun Dec 11, 2005 5:11 am
Posts: 153
First name: Chuck
Last Name: Kish
City: Saratoga Springs
State: NY
Zip/Postal Code: 12866
Country: USA
Status: Amateur
Funny, I was struck with just the opposite idea from Tony. It looks like if the glue would loosen a little on the inside the joint might slide a bit and prevent the "wrinkle".

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