Stretch blow molding apparatus

Details Stretch blow molding apparatus Stretch blow molding apparatus

Filed on

1976-06-23

Date issued

1977-07-19

Examiner

Lazarus, Richard B.

Patent Class

Plastic article or earthenware shaping or treating: apparatus

SubClass

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

SubSubClass

Including means to prepare parison

Other Related Categories

425437, 425535, 425536, B29C 1707

Type

Patent

Status

active

Patent number

040365735

Description

ABSTRACT:
A stretch blow molding method for blow molding hollow articles from tubular parisons, and a molding apparatus for carrying out the method. The method includes mounting a tubular parison having a closed end and an open end on a stretch pin means with the closed end in the upper position, and then moving the stretch pin means into an open multi-section molding apparatus. The stretch pin means is then operated to stretch the parison to a predetermined length with the mold halves in an open position. The mold halves are closed after said stretching operation and blow air under pressure is introduced into the parison near the neck portion to blow the parison into molding contact with the closed multi-section mold apparatus. After the molds are opened the article is ejected by air exiting from the tip of the stretch pin near the base of the article.

REFERENCES:
patent: 3496597 (1970-02-01), Ayres
patent: 3776991 (1973-12-01), Marcus
patent: 3924998 (1975-12-01), Moore

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