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| Blocking Sound Hole During Construction https://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=37624 |
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| Author: | Spyder [ Mon Sep 03, 2012 12:41 pm ] |
| Post subject: | Blocking Sound Hole During Construction |
Do any of you close off the sound hole during construction? It occurred to me that, after vacuuming all the dust out before gluing on the back, I'd get it all dusty inside again once I stared sanding the box. I was thinking maybe a disc of blue tape stuck from the underside, if I can figure out how to get it to stick without being able to press against it from the inside. And I suppose the same thing would be needed during finishing to keep from getting finish on the label, etc. Any thoughts? |
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| Author: | meddlingfool [ Mon Sep 03, 2012 12:43 pm ] |
| Post subject: | Re: Blocking Sound Hole During Construction |
I only close it for finishing, using a plastic lid and a block of mattress foam to keep it in place... |
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| Author: | npalen [ Mon Sep 03, 2012 12:47 pm ] |
| Post subject: | Re: Blocking Sound Hole During Construction |
Some guys use a balloon to hold the disc in place but I've found that it tends to deflate after a few days. |
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| Author: | Jim Watts [ Mon Sep 03, 2012 1:31 pm ] |
| Post subject: | Re: Blocking Sound Hole During Construction |
I do the ballon and a lid, but in all honesty the sponge is a better idea sense it won't deflate. |
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| Author: | David Newton [ Mon Sep 03, 2012 2:00 pm ] |
| Post subject: | Re: Blocking Sound Hole During Construction |
Well I suppose this will blow your minds, but since the first step on the top is cutting for the rosette and the sound hole, I leave a "wafer" of wood at the bottom of the hole cut, and do not remove the circle until I'm ready to sand the hole edges smooth. That is after all binding and sanding steps, even to seal / wash coats of finish. I do all my sanding by hand with blocks, and find it easier to work the top without the hole "in the way", and it keeps all rough and fine swarf out until finishing, which is hand french polishing, so I don't cover the hole during finishing anyway. I don't think I've seen anyone else do it this way, but it works well for me. |
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| Author: | SteveT [ Tue Sep 04, 2012 12:06 pm ] |
| Post subject: | Re: Blocking Sound Hole During Construction |
I rolled up a piece of 1" thick foam until the roll diameter was somewhat larger that the sound hole. Taped the roll with masking tape to keep from it unwinding. The length of the roll is about the depth of the body, or a bit more. The roll is easy to insert into the hole & positioned with the rolled edge visible. After inserting the roll, I cover it with a 6"x6" half-inch thick piece of foam, all stuffed inside the hole. The compression fit seals around braces automatically. The 2nd piece of foam also makes for easy vacuuming of any dust or other detritus that accumulates as the build progresses. Also easy to remove & reinsert. Can also use during the finish process. |
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