Injection stretch blow molding method of a cylindrical narrow mouth container and a container
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Dec 30, 2004
app pub date -
Jun 10, 2004
filing date -
Jun 16, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention relates to an injection stretch blow molding method of forming a cylindrical narrow mouth container comprising the following steps; injection molding a preform having a body portion integrally molded with a neck portion wherein the body is formed thicker-wall and larger outside diameter than the neck portion from a closing surface between a neck mold and an injection cavity mold, and having a step-out portion, wherein an upper surface of the step-out portion is formed by the closing surface of the neck mold between the neck portion and the body portion and the step-out portion has a smaller outside diameter than the body of the container, and stretch blow molding the preform to the container in a blow cavity mold, wherein a body portion of the container is formed thin-wall from around the upper surface of the step-out portion, and the step-out portion and an expanded portion around the upper surface of the step-out portion form a shoulder portion of the container flat, and also the outside diameter of the step-out portion is smaller than the outside diameter of the open end of a cap.
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