| Official Luthiers Forum! http://www-.luthiersforum.com/forum/ |
|
| Re-bending bent Bubinga sides http://www-.luthiersforum.com/forum/viewtopic.php?f=10102&t=4827 |
Page 1 of 1 |
| Author: | Dennis Leahy [ Mon Jan 30, 2006 10:10 am ] |
| Post subject: | |
I just bent a set of waterfall Bubinga into an S-shaped cutaway. They have gone through a cooldown, and a second heating session, and are still in the bender. (This is a silicone blanket system.) The cutaway is pretty close, but not snug with the mold. There's about an 1/8" gap between the sandwich and the form. With springback, it will probably be a bit worse than that. The cutaway is quite a bit smaller diameter than my bending iron, so I'd have to improvise a new small diameter hot pipe for touch up... or... What about the idea of re-wetting, and rebending the bent sides, only this time, eliminate the spring steel that was below the wood? I used 3 pieces of spring steel for the initial bending. Worked great for the upper (non-cutaway) side, but was probably too restrictive for the cutaway side. My setup was: bending form, then: .012" spring steel wet paper wet wood wet paper .012" spring steel silicone heating blanket .012" spring steel And I'm thinking of refining the bend with this setup: bending form, then: wet paper wet wood wet paper .012" spring steel silicone heating blanket Does this sound like it would work? Any suggestions? Thanks, Dennis |
|
| Author: | tippie53 [ Mon Jan 30, 2006 11:05 am ] |
| Post subject: | |
Can you get the wood to shape in the mold with a little pressure? I personally don't use cutaway molds anymore. I figure if the side is attached to the neck block and the side is blocked to the mold I just let the cutaway flow on its own. I have split a few trying to get them perfect and as a result fixed it till it broke. Babinga ,next to paduk is one of the hardest woods to bend well. Higher figured babinga is a real test of patience and skill. If you are going to fret over the smaller radius , you may need to touch up on a bending iron. John Hall Take it slow as the wood fibers need to compress to allow bending |
|
| Author: | Dennis Leahy [ Mon Jan 30, 2006 12:11 pm ] |
| Post subject: | |
Thanks, John. I'll pull it out of the mold, and see how much it springs, to get a better idea of what it needs. (Maybe it "needs" to be left alone, as you suggest, to avoid breaking it.) I have a female mold for this, with integrated cutout as well, so I may not be able to get it into that mold if I don't get the curves to where they were supposed to go. So far, I am pretty thrilled not to have cracked the Bubinga. Dennis |
|
| Page 1 of 1 | All times are UTC - 5 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|