Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1990-08-20
1991-09-24
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
425533, 425534, B29C 4906, B29C 4932
Patent
active
050512277
ABSTRACT:
A plurality of injection cores are inserted by a movable platen into corresponding injection cavities defined by mold inserts within a stationary platen, and the cores extend through corresponding split transfer mold cavities. After hollow preforms with threaded neck portions are molded within the cavities, the preforms are removed from the mold cavities, separated from the injection cores, and then shifted transversely by the split transfer molds to cooling or blow cavities defined by blow cavity inserts within the stationary platen on opposite sides of the corresponding injection cavities. The transfer molds return to receive the injection cores, and corresponding blow core units are inserted into the preforms within the blow cavities for pressurizing and expanding the preforms into firm contact with the blow inserts. The preforms are removed from the blow cavities by the blow cores in alternate cycles of press operation and are then released by retraction of the blow cores. The split transfer molds are shifted transversely in opposite directions and are opened and closed by a cam system which includes cam tracks mounted on the movable platen and incorporating cam track switches.
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Brun, Jr. Charles J.
Newport Anthony F.
Electra Form, Inc.
Silbaugh Jan H.
Timm Catherine
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