This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Wally I use "Saran Wrap" as a release agent and have never had a problem. It = is the standard release agent whenever needed for any gluing. I've had = trouble with waxed paper under clamping pressure. Paul Chick ----- Original Message -----=20 From: Wilsons=20 To: pianotech@ptg.org=20 Sent: Friday, January 04, 2002 5:28 PM Subject: Re: Glassing the block One of the first rebuilders I saw do a pinblock used waxed paper or = saran-wrap type stuff. I think it was waxed paper. We let it set = overnight and came back the next day to find it released quite nicely. = Have you tried it or had problems with it? I've declined so far to use = epoxy, but may try it to put on finishing touches. Wally Wilson =20 At 09:44 AM 1/5/02 +1100, you wrote:=20 Terry, Del and all, ----- Original Message ----- From: Terry Farrell Hello Del. When you wax your plate flange, you must use some thin, = wipe-on type of wax, such that it doesn't fill small depressions that = may be present in the plate flange surface - or is that not really a big = deal? What do you do. We grind the plate flanges to remove the small depressions before = applying the release agent, otherwise there is a risk of the epoxy = keying the pinblock to the plate. While this will be less of a problem = with single flanged plates, our pianos have a flange either side of the = pin block (front and rear). Since we epoxy fit the plank to both flange = faces (before the plank is fitted to the case - while screwed to the = plate), we would run a big risk of gluing it in for keeps, unless the = plate flanges are free of depressions. How thick do you make your epoxy mixture - peanut butter? We use an Australian made paste-like industrial epoxy which has = similar strength properties to West System (which we use for other uses = such as gluing up our multi-laminated bridge caps). Also, when you put your epoxy mixture in, what is your exact = procedure in order to avoid having excess epoxy migrate to the area = between the pinblock top and the plate web bottom and thus impair the = fit. Do you screw the pinblock to the plate first and then mooosh epoxy = into any small gaps between the pinblock and flange? Or do you put a = bead of epoxy on the flange edge of the pinblock and draw it into the = flange somehow? Thanks. The wax is standard floor wax. Ditto. Others use a spray-on mold release. Either works. =20 The consistency is about like peanut butter. =20 The pinblock is shaped for a good wood-to-flange fit first. Then the = epoxy matrix is troweled on to the pinblock (front) surface with a = suitable putty knife and the pinblock is screwed in place. There may be = some migration up over the top because there is inevitably some space = between the top of the pinblock and the bottom of the plate tuning pin = panel. Unless, of course, you've done a perfect fit along the top as = well. I've never managed to do that quite. The excess will clean off. = When the epoxy has cured, disassemble the pinblock and clean it up. = Knock off the squeeze-out along the edges, etc. I go over the whole = thing with 60-grit sandpaper lightly to smooth of the roughness from the = casting but not enough to alter the fit. =20 There are other procedures that probably work just as well. This is = mine. I use the epoxy matrix to improve an already good = pinblock-to-plate fit. Others simply hack out the block on a bandsaw and = use the epoxy matrix to mate the whole thing. That seems to work as well = but I've never been comfortable with the idea of it. =20 Del This has been my experience too Del. Epoxy should not be used as a fix = for a poorly fitted block, it should be used to make a well fitted block = near perfect. If used in this way, you will never have a problem with = the paste type epoxy running around to the top face of the pin block. I'm sold on this idea of epoxy fitting blocks. It really helps tuning = stability. Regards, Ron O --=20 OVERS PIANOS Grand Piano Manufacturers _____________________________ Web: http://www.overspianos.com.au Email: mailto:ron@overspianos.com.au _____________________________ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/51/c5/0b/ba/attachment.htm ---------------------- multipart/alternative attachment--
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