Blow pin assembly

Details Blow pin assembly Blow pin assembly

1982-08-02

1985-02-05

Silbaugh, Jan

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Forming baffle, bottleneck, or handle

264533, 264536, 425527, 425531, 425535, B29C 1707, B29C 1712

Patent

active

044976224

ABSTRACT:
This invention relates to a blow pin assembly for use in extrusion blow molding processes to yield thermoplastic containers having a dripless pour lip. The dripless pour lip is achieved by forge forming a portion of the neck moil, which moil is characteristic of extrusion blow molding processes. The shape of the pour lip is dictated by a downwardly facing groove carried by a cutter collar which is part of the blow pin assembly. This groove coacts with a split annular anvil carried by the split blow mold to achieve the necessary forge forming of the container lip. The cutter collar also achieves removal of the excess neck moil material by a shearing action achieved between the outside edge of the groove and the split annular anvil.

REFERENCES:
patent: 3224038 (1965-12-01), Bubesheim
patent: 3531556 (1970-09-01), Mehnert
patent: 3752628 (1973-08-01), Hafele et al.
patent: 3971788 (1975-11-01), Padovani
patent: 4095927 (1978-06-01), Roberg et al.
patent: 4173447 (1979-11-01), Bradbury

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