Stringiness-preventing pad used in an injection mold

Details Stringiness-preventing pad used in an injection mold Stringiness-preventing pad used in an injection mold

1990-09-26

1992-01-07

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

2643289, 425563, B29C 4538

Patent

active

050785885

ABSTRACT:
A stringiness-preventing pad having a resin passage hole defined by partition leaves is interposed between a sprue bush and an injection cylinder nozzle so that the partition leaves are spread by the pressure of molten resin material being injected into a mold and elastically closed upon completion of injection. The resin material solidified in the sprue is prevented from stringing by virtue of the partition leaves when removing a molded object from the mold.

REFERENCES:
patent: 4944909 (1990-07-01), Eckardt
Webster's Ninth New Collegiate Dictionary, 1986 p. 469.

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