Extrusion head for blow molding
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United States of America Patent
Stats
-
Apr 15, 1997
Grant Date -
N/A
app pub date -
Oct 3, 1995
filing date -
Oct 3, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An extrusion head for extruding a polymer into a parison for blow molding and including a die ring and a mandrel. The die ring and mandrel each include a frustoconical portion. One frustoconical portion is shaped over its full length to define an ovalized annular outlet. The frustoconical portion is also shaped over less than its full length with a recess that is rotationally offset from the first and generally located upstream therefrom. The shapings result in the prison being extruded in a controlled manner through the outlet orifice with a predetermined area of increased thickness.
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Cited Art Landscape
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