The invention relates to a hydraulic device for the back and forth movement and locking of a machine part, in particular for the opening, closing and locking of an injection molding tool. The hydraulic device comprises a cylinder (1), in which a first pressure space (6) is provided,
This clamping device (5) is of the type comprising a peg (6) which projects from the half-mold (2) and which is received in a recess (17) in the platen, and a clamping mechanism (5) including a transverse cylinder (9) and a wedge (8) deigned to interact with the peg in order to ensure th
