Glue pinblock plugs

[Carl Meyer]

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Lucky Pierre!  No, it's so that all the top layers of the block are =
fully impregnated with the epoxy.  This will restore the integrity of =
the block.

An even better but impractical procedure would be to put the block in a =
vacuum chamber and slowly evacuate the air (it will bubble profusely) =
drawing all the air out of all the nooks and crannys (what's a cranny?) =
Then when the atmospheric pressure is restored the pressure will force =
the epoxy into all those small crannys.

Epoxy used for optical purposes must be "outgassed" in a vacum chamber =
to make it suitable for use where any bubbles would be catastophic.  =
Vacuum impregnation is the process of completly sealing a substance.  =
Hey! Maybe we should inpregnate all soundboard wood.  Oh! God!  I don't =
want to start another soundboard thread.

Carl Meyer PTG assoc
Santa Clara, Ca.


  ----- Original Message -----=20
  From: Gevaert Pierre=20
  To: Pianotech=20
  Sent: Tuesday, February 22, 2005 2:26 PM
  Subject: Re: Glue pinblock plugs


  Hi,

  Thanks for the input.
  If I understand you fill the holes with epoxy completely to the top of =
the pin block? I suppose this is for making the new holes easyer to =
drill.
  As it is an open face pinblock in this case I suppose it is easyer to =
fix than with a covered pinblock?

  Pierre Gevaert
    ----- Original Message -----=20
    From: Carl Meyer=20
    To: Pianotech=20
    Sent: Monday, February 21, 2005 11:02 PM
    Subject: Re: Glue pinblock plugs


    I'd first seal the bottom of the block with wax paper, 1 inch foam =
and a particle board panel.  Use paste epoxy around the edges or it will =
leak.  Now warm the block (warm to the touch) to further encourage =
capillary action.  Fill all tuning pin holes with thin epoxy. Refill as =
needed. Epotek 301 is the thinnest I've found, but there are others.  =
Let cure for about 2 days and drill for plugs.  I'm not sure it matters =
much what glue you use for the plugs.  I've used titebond.  You may need =
to go to metric to get the best fit for the plugs, either 3/8 or 1/2.  =
Half inch may overlap making it a two step process.

    One time I drilled right thru the plate with a 3/8 drill and let the =
plugs be level with the top of the plate.  For cosmetics I used a =
bushing cloth punching over the tuning pin.  This piano already had the =
plate installed and I didn't want to take it out again.  I've done this =
a few times and haven't had any problems.

    Carl Meyer PTG assoc
    Santa Clara, Ca.

      ----- Original Message -----=20
      From: Gevaert Pierre=20
      To: Pianotech=20
      Sent: Monday, February 21, 2005 12:57 PM
      Subject: Glue pinblock plugs


      Hi list,

      I checked the Pianotech archives trying to find out what's the =
best way to glue laminated pinblock plugs in a cracked pinblock but I =
could'n't find out.
      Is epoxying  the best way to fix these plugs ore are there better =
glues?
      Thanks for some advice.

      Pierre
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