Rotary injection turret for the making of preforms

A preform injection molding and treating apparatus, said apparatus comprising an injection mold having plural preform cavities arranged in rows and columns, an extruder coupled to said preform mold for simultaneously injecting plastic material into all of said preform cavities, a turret having a plurality of support faces spaced equally about an axis, means mounting said turret for indexing about said axis, each of said support faces having projecting therefrom a plurality of cores equal in number to said preform cavities and arranged in rows and columns with the same spacing as said preform cavities, a conditioning mold angularly displaced from said injection mold about said turret, said conditioning mold having a plurality of conditioning cavities equal in number to said preform cavities and arranged in rows and columns with the same spacing as said preform cavities, each of said conditioning cavities being of a greater size than said preform cavities to provide a space around a preform positioned therein for the circulation of a conditioning fluid, means for effecting relative movement between said injection mold, said turret and said conditioning mold to effect the selective opening and closing of said preform cavities and said conditioning cavities;

• and means for rotating said turret to sequentially present said cores to said preform cavities and then to said conditioning cavities, said conditioning mold opposing said injection mold with said conditioning mold defining a first station and said conditioning mold defining a third station, coolant flow means at a second station for cooling newly molded preforms between said injection mold and said conditioning mold, and preform removing means at a fourth station for stripping preforms from said cores before recycling said cores to said injection mold.