I was wondering this exact thing myself. I am STILL constructing a couple massive clamps for forming/laminating 9-inch wide ribs. Parts of my jig have required laminating pieces of wood that measure 9 inches by up to 59 inches. I have been using regular Titebond and Titebond II and spreading it out with a 3-inch-wide roller (thanks Ron O. for the idea - really spreads even and fast). When I need to glue up six rib laminations at a time, even with the glue going onto a piece really fast, it still takes a good 10 minutes to get all the clamps (20 of 'em) on the jig and real snug (I'm working on a system to reduce this time). So I have the concern that gluing the rib together with this schedule may result in less-than-optimal glue joints. I was thinking that I should be using Titebond Extend. Or liquid (cold) hide glue. What are thoughts on the good ol' hide glue - it has lots of working time - ribs and panels are not for underwater work, are they? Terry Farrell ----- Original Message ----- From: "Overs Pianos" <sec@overspianos.com.au> To: "Pianotech" <pianotech@ptg.org> Sent: Friday, August 29, 2003 7:51 PM Subject: Titebond extend gluing times. > Hi all, > > I am wondering if anyone has already had experience using both > Titebond Regular and Titebond Extend? > > I have been using our new vacuum press for some weeks now, building > sound board test samples of one rib with a strip of sound board panel > attached. So far I've been using Titebond Regular since I've only > been gluing one rib at a time. We are applying the glue with a short > knap paint roller, and I've learned to apply just the right amount so > that we achieve a good glue joint without having any squeeze-out. > This is important when using a vacuum press since there is no > opportunity to wipe away excess glue until the job is taken off the > press, by which time is too late. > > When using Titebond regular, samples can be taken out of the press in > 40 mins. While I will test times with Extend, I thought someone might > already have an idea just how much longer Extend takes to set, to > help me get started with this glue. In addition to its ability to > allow longer set up times, Extend is a bit stronger than Regular. > > After many weeks of testing, I seem to be honing in on a totally new > sound board design. While I can tell you that we will be using a > laminated panel and the ribs are fully machine crowned, I can't > reveal anything further on the design just yet, I'll release details > as soon as we are able. > > Best, > Ron O. > -- > > OVERS PIANOS - SYDNEY > Grand Piano Manufacturers > _______________________ > > Web http://overspianos.com.au > mailto:ron@overspianos.com.au > _______________________ > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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