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US 4,950,152 AGranted
Apparatus for producing preforms and blow molded articles
AssigneeElectra Form, Inc.
InventorsCharles J. Brun, Jr., Anthony F. Newport
Life of this patent
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AssigneeElectra Form, Inc.
InventorsCharles J. Brun, Jr., Anthony F. Newport
Estimating the term…
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 on 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.
A mold assembly for efficiently producing hollow articles, comprising a stationary platen and a generally parallel movable platen, a stripper platen disposed between said stationary and movable platens, means defining a plurality of injection cavities and supported by said stationary platen, a corresponding plurality of injection cores supported by said movable platen for movement between retracted positions and extended positions within said injection cavities, means defining at least one blow cavity for each of said injection cavities and supported by said stationary platen adjacent said injection cavity, a blow core unit for each of said blow cavities and having an axis, means mounted on said movable platen and supporting each said blow core unit for axial movement between an extended position and a retracted position relative to said movable platen, a transfer mold unit for each of said injection cavities and forming an extension of said injection cavity, means mounted on said stripper platen and supporting said transfer mold units for lateral movement relative to said stripper platen and said injection cores and said blow core units and between corresponding alignment with said injection cavities and with said blow cavities, and means for moving said transfer mold units laterally relative to said injection cores and said blow core units for transferring the articles molded in said injection cavities to the corresponding said blow cavities without lateral transfer of said injection cores and said blow core units.
A mold assembly for efficiently producing hollow articles, comprising a stationary platen and a generally parallel movable platen, a stripper platen disposed between said stationary and movable platens, means defining a plurality of injection cavities and supported by said stationary platen, a corresponding plurality of injection cores supported by said movable platen for movement between retracted positions and extended positions within said injection cavities, means defining at least one blow cavity for each of said injection cavities and supported by said stationary platen adjacent said injection cavity, a blow core unit for each of said blow cavities and having an axis, means mounted on said movable platen and supporting each said blow core unit for axial movement between an extended position and a retracted position relative to said movable platen, a transfer mold unit for each of said injection cavities and forming an extension of said injection cavity, means mounted on said stripper platen and supporting said transfer mold units for simultaneous lateral movement relative to said stripper platen and said injection cores and said blow core units and between corresponding alignment with said injection cavities and with said blow cavities, and cam actuated means responsive to relative movement between said stripper platen and said movable platen for moving said transfer mold units laterally relative to said injection cores and said blow core units for transferring the articles molded in said injection cavities to the corresponding said blow cavities without lateral transfer of said injection cores and said blow core units.
A mold assembly for efficiently producing hollow articles, comprising a stationary platen and a generally parallel movable platen, a stripper platen disposed between said stationary and movable platens, means defining a plurality of injection cavities and supported by said stationary platen, a corresponding plurality of injection cores supported by said movable platen for movement between retracted positions and extended positions within said injection cavities, means defining two blow cavities for each of said injection cavities and supported by said stationary platen with said injection cavity therebetween, a blow core unit for each of said blow cavities and having an axis, means mounted on said movable platen and supporting each said blow core unit for axial movement between an extended position and a retracted position relative to said movable platen, a split transfer mold unit for each of said injection cavities and having a pair of opposing mold sections forming an extension of said injection cavity, means mounted on said stripper platen and supporting said transfer mold units for simultaneously lateral movement relative to said stripper platen and said injection cores and said blow core units and between alignment with the corresponding said injection mold cavities and alignment with the corresponding said blow cavities, and means for moving said transfer mold units laterally relative to said injection cores and said blow core units and for opening and closing said mold sections for transferring the articles molded in said injection cavities to the corresponding said blow cavities without lateral transfer of said injection cores and said blow core units.
Dependencies are inferred from the claim text.