B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 43/00 (2006.01) B29C 43/08 (2006.01) B29C 43/36 (2006.01) B29C 43/58 (2006.01) B30B 1/32 (2006.01) B29C 31/04 (2006.01)
Patent
CA 2123391
Abstract of the Disclosure A method and apparatus for compression molding plastic articles including closures which includes providing coacting sets of tools including a first set for moving a core and core sleeve into engagement with a cavity mold on a second set of tooling. An actuator is provided between the first set of tooling and a fixed upper cam. The second set of tooling includes an associated actuator supporting the cavity mold and associated with a lower fixed cam. 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. 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.
Gowling Lafleur Henderson Llp
Owens-Illinois Closure Inc.
Thompson David C.
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