Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream... – Including auxiliary shaping means associated with molding...
Patent
1998-03-19
2000-05-02
Silbaugh, Jan H.
Plastic article or earthenware shaping or treating: apparatus
Stock pressurizing means operably associated with downstream...
Including auxiliary shaping means associated with molding...
4251331, 4253823, 26417129, 2642098, B29C 4724
Patent
active
060565330
ABSTRACT:
An extrusion assembly includes a stationary housing section, and an outer die and mandrel for defining an annular passageway centered about an axis. The outer die and mandrel are held stationary against rotational motion about the axis. A rotor is rotationally supported on a shaft projecting into the annular passageway along the axis within the housing, for rotational motion about the axis. The rotor includes a melt channel for rotationally conveying an extrusion to the annular passageway, so as to form a helically-wound conduit that advances linearly through the annular passageway. A gear train is operative between the stationary housing, the rotor and the shaft, to hold the shaft stationary relative to the stationary housing upon rotation of the rotor.
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Ellison, Sr. Jesse D.
Hawkins Thomas W.
Schafer Michael S.
Silbaugh Jan H.
Staicovici Stefan
The Lamson & Sessions Co.
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