Forming press mat utilizes trays formed of thin bottom plates and separate annular frames

DETAILED DESCRIPTION The invention has for its object to overcome this disadvantage by suggesting a press plant construction including a forming press of the pressure cell type so as to prevent the forming space available during forming from being restricted by working pressure dependent dimensioning factors of the tray.
According to the invention, this is accomplished with a press plant which makes use of trays that each comprise a thin bottom plate and a separate annular frame which is removably positionable on the thin bottom plate and has thin long sides and thick short ends.
By setting aside the principle construction of trays for such presses that has been established since the fifties and letting instead the axial load induced by the working pressure be absorbed by a horizontal, annular frame disposed outside the press stand, there is obtained a forming space which, under prevailing working pressures, is considerably larger than that of prior art tray constructions.
Furthermore, the inventive design involving a loose tray frame and a planar bottom plate affords simplified handling during operation of the plant.
These and other advantages will appear more clearly in the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings.