Method and apparatus for compression molding plastic articles.

摘要

A method and apparatus for compression molding plastic articles including closures which includes providing coacting sets of tools including a first set (27) for moving a core (41) and core sleeve (42) into engagement with a cavity mold on a second set of tooling (28) . An actuator is provided between the first set of tooling and a fixed upper cam (29). The second set of tooling (28) includes an associated actuator (52) supporting the cavity mold and associated with a lower fixed cam (31). A nitrogen cylinder in the second set of tooling provides for control of the compression molding force. In a preferred form, a plurality of sets of tooling are provided in circumferentially spaced relation on a rotating turret supported by a central column (21). A common manifold supplies the pressure at accurately controlled pressure to each of the nitrogen cylinders. A control system is provided for monitoring and changing the pressure.