It is not unusual to use compressed air to blow the forms loose.
This method is typically used on large pan forms when used to make
"waffle" decks.

(top posted for your convenience)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Keep the whole world singing . . . .
DanG (remove the sevens)




"tghattaq" wrote in message
...

Goedjn Wrote:

To give details of the form work in chapter and verse. I build
up the
form in good, clean timber like first grade red deal. It has to
be
pretty good to successfully router to shape. As I stated, it is
a good
mental exercise to devise how this will demount leaving support
underneath whilst freeing the face to dry after a couple of
days. To

I don't understand this. WHy would you want to dry the
surface?

Sorry slipping into local terminology. Simply if I do not
release the
shutter from the complex face of the casting after three or four
days
there is so much adhesion when the mixture has become cured that
the
face is prone to damage and slithers come away attached to the
form
work in prising it off.

Giles


--
tghattaq