Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – Mold having movable core or movable pin
Patent
1984-11-28
1986-09-09
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
Mold having movable core or movable pin
425443, 425DIG58, 249 59, 249 63, 249 66R, B29C 3344, B29D 100
Patent
active
046106219
ABSTRACT:
This relates to a mold for forming closure caps and like cap-like members having a peripheral body with internal threads. The mold is constructed to have an irregular parting line with the result that a major part of the body of the closure cap may be externally defined by that mold member which is moved to an out-of-the-way position when the mold is opened, leaving the injection molded closure cap body free for radial expansion and thus permissible stripping of the closure cap from the core about which it is molded. This construction eliminates the customary ejector sleeve and permits the base mold member to function as an ejector block for directly stripping the molded closure cap from the core. This construction permits mating tapered surfaces on the base mold member and the core which form a seal and do not have relative sliding contact, thereby eliminating previous undesired wear surfaces. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.
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Kras Stephen J.
Taber James M.
Brown Charles E.
Continental White Cap Inc.
Housel James C.
Woo Jay H.
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