Hydraulic press with pressure cell

DETAILED DESCRIPTION According to the invention, a reduction of the high stress at a thickness transition zone (e.
g.
between the intermediate portion and an end wall portion) is achieved in either or both of the press plate or base of the press tray by the provision of play between the press plate and/or between the base of the press tray and the confronting force-absorbing surface in the press frame, in the vicinity of the thickness transition zone.
This play results in a deformation within the non-supported portion of the press plate and/or of the base of the press tray, respectively, of such a kind that a superimposed compressive stress arises in the sensitive zone where the thickness transition occurs.
This results in a reduction of the tensile stress caused by the axially outwardly-directed forces from the press pad on the end wall portions of the press plate and/or base of the press tray.
The above-mentioned play may be provided in many different ways.
For example, a transverse recess may be provided on the outwardly facing side of the press plate and/or base of the press tray confronting the respective force-absorbing surface, or a spacing plate may be inserted between the press plate or the base of the press tray and the respective force-absorbing surface.
It is also possible to provide a recess in the force-absorbing surface.