MOULDING UNIT FOR STRETCH BLOW-MOULDING PLASTIC CONTAINERS AND METHOD FOR CHANGING THE MOULDS AND STRETCHING RODS

摘要

A molding unit for a plant for blow-molding plastic containers (2), particularly bottles, from respective parisons (3) is equipped with an interchangeable mold (16) having at least one cavity (19) for blow-molding a respective container (2), and at least two stretching rods (33) mobile along a predetermined line (24) to engage respective parisons (3) and to axially deform the parisons (3) themselves; the stretching rods (33) being selectively mobile according to the number and/or position of the molding cavities (19) of the mold (16) mounted on the molding unit at a given time.