(57) A half-die (1) for pressing loose material, particularly ceramic mixes, comprising
at least one shoe assembly (2) provided with
- a substantially plate-like base body (3),
- presser means (4), which are adapted to act on the loose material to be pressed
and are associated at one face (3a) of the base body (3) and can move between an inactive
configuration, in which they are close to the base body (3), and at least one first
active configuration, in which they are substantially spaced from the base body,
- at least one suspension cylinder (5) which uses a fluid medium and is interposed
between the base body (3) and the presser means (4) and is associated with a first
circuit (6) for feeding a first incompressible fluid for actuating the movement of
the presser means (4) between the inactive configuration and the first active configuration,
- at least one seat (17) associated with the base body (3),
- at least one piston (18) for the return of the presser means (4) to the inactive
configuration, which is accommodated slidingly in the seat (17) and is provided with
at least one abutment surface (19) that is adapted to abut against corresponding stop
means (20) associated with the seat (17) at the at least one active configuration
and
- a second circuit (21) for sending a second incompressible fluid between the abutment
surface (19) and the stop means (20) so as to actuate the return of the presser means
(4) to the inactive configuration, the stop means (20) being accommodated so that
they can move along the seat (17) between a first position, in which the presser means
(4) can move between the inactive configuration and the first active configuration,
and a second position, in which the presser means (4) move to a second active position,
and comprises means (24) for adjusting the position of the stop means (20) along the
seat (17).
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