Dual screw extrusion apparatus having a mixing chamber and a conveying chamber downstream thereof with the mixing chamber having a wall clearance greater than that of the conveying chamber
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United States of America Patent
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Jul 28, 2015
Grant Date -
Jul 9, 2009
app pub date -
Mar 13, 2009
filing date -
Apr 24, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An extrusion apparatus including a mixing chamber comprising two intersecting housing bores and an inlet positioned to receive material into the mixing chamber. Two screw shafts are supported for rotation about respective generally parallel axes and include respective screw sections positioned for co-wiping intermeshing rotation within the respective housing bores of the mixing chamber. The apparatus supports screw shaft rotational speeds greater than approximately 800 rpm and includes screw shaft conveying portions that are rotatably cantilevered for self-journaled support within respective separate conveying chambers arranged generally parallel to one another downstream of the mixing chamber.
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