Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With coupling between charger and mold
Patent
1981-02-02
1983-01-11
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With coupling between charger and mold
425568, B29F 103
Patent
active
043680283
ABSTRACT:
An annular flow plastic extrusion nozzle or gate is provided with a torpedo to heat the plastic to be extruded through the gate. A passage is provided around the torpedo and the torpedo has a flattened end in the parting line of the mold. An annular opening is provided around the base of the torpedo in the nozzle or gate housing. A conical recess is provided in the flat end of the torpedo to receive a correspondingly shaped male extension of a shaft or core pin removably mounted in a portion of the mold. A hub cavity in that portion of the mold may be provided around the end of the pin and mold cavities extend therefrom as desired to form propellers or impellers or rotors of the desired configuration. Discharge of the flowable plastic through the 360.degree. annular nozzle or gate into the mold cavities prevents any compacting of the plastic and provides an even distribution and flow thereof whereby the resulting propeller, impeller or rotor has no heavy spots affecting even and uniform rotation about the precisely centered core pin or shaft.
REFERENCES:
patent: 2817115 (1957-12-01), Freifeld
Grish Anthony J.
Grish Thomas A.
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