Case separation or delamination question

[Isaac OLEG SIMANOT]

Hi,

I recall receiving some data from the Bosendorfer factory, that they use to
glue their boards at 5% moist (and on crowned ribs).

Regards.

Isaac


> -----Message d'origine-----
> De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part
> de Ron Nossaman
> Envoye : lundi 1 avril 2002 01:38
> A : pianotech@ptg.org
> Objet : RE: Case separation or delamination question
>
>
> >I don't understand why this method is still used, and why not in
> conjunction
> >with crowned ribs.
>
> Hi Isaac,
> I don't understand why either, other than the compression crowning being
> considered "traditional". Rib crowning is a far more predictable and
> dependable method.
>
>
> >I guess that gluing on crowned ribs only does not build enough internal
> >tension to the board to be very efficient is not it ?
> >
> >Isaac OLEG
>
> The panel is still dried down for crowned ribs, just not as much.
> Something
> around 6%MC, so there is still plenty of compression in the panel. A rib
> crowned board is every bit as efficient as a compression crowned board.
> More so, in my opinion.
>
> Ron N
>