Plant for forming ceramic tiles, including those of large dimensions, by means of a partially isostatic molds

A plant for forming ceramic tiles, including ceramic tiles having large dimensions, said plant comprising:

• a bed;
• a ceramic mold supported on said bed;
• a fixed upper cross-member and a movable cross-member connected to said fixed cross-member by means of a double-acting hydraulic cylinder-piston unit;
• a punch supported by said movable cross-member;
• a source of pressurized hydraulic liquid connected to a cylinder of said cylinder-piston unit via a distributor valve;
• and
• a maximum pressure valve of adjustable setting, wherein said punch includes
• a cavity,
• a lattice positioned within said cavity and defining a plurality of cells,
• an elastic membrane securely fixed to edges of said cavity and of said lattice, said cells communicating with a single manifold connected to a pressurized oil source via a distributor valve arranged to connect said cavity alternately to said source and to a discharge of the distributor valve, and
• programmed means for operating said distributor valve.