Apparatus for manufacturing biaxially oriented, thermally stable

Details Apparatus for manufacturing biaxially oriented, thermally stable Apparatus for manufacturing biaxially oriented, thermally stable

1995-03-16

1996-03-26

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

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

With heating or cooling means

264530, 425529, B29C 4964

Patent

active

055015905

ABSTRACT:
An apparatus for blow-molding PET containers suitable for hot-filling includes a first machine having an injection station, a thermal conditioning station, a primary blow-molding station, and an exit station. A second machine includes the oven chambers and a final blow-molding station. The primary article is sealed by a cap member that has a pressure relief valve connected to it to limit the internal pressure during heating, an air supply passage for final blow-molding, and a tensioning rod for insertion into the primary article and engaging a pocket in the center of the article's bottom. In some applications, it is necessary to stiffen the neck, particularly when hot-filling at about 200.degree. F. or higher, or when using a closure roll-on die or a lugged neck finish to apply a bottle cap to the final container.

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