Thread forming and neck finishing process

Details Thread forming and neck finishing process Thread forming and neck finishing process

1976-12-27

1977-12-27

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264161, 425525, 425529, B29C 1707

Patent

active

040655350

ABSTRACT:
The invention is a process for biaxially blow molding hollow plastic articles to provide a finished neck of axially oriented material in the molding step. One end of a plastic parison is placed over a blow pin positioned between separable mold halves. The parison is then axially oriented and necked down over said blow pin. A crammer sleeve is positioned over the blow pin to cram axially oriented material into the neck finishing cavities when the molds are closed over said blow pin and parison.

REFERENCES:
patent: 3209401 (1965-10-01), Mehnert
patent: 3531556 (1970-09-01), Mehnert
patent: 3539670 (1970-11-01), Hall
patent: 3651186 (1972-03-01), Hall
patent: 3801690 (1974-04-01), Dilbert

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