Surge suppressor for vented injection molding machine screw
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United States of America Patent
Stats
-
May 22, 2001
Grant Date -
N/A
app pub date -
Sep 25, 1998
filing date -
Sep 25, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plasticating apparatus adapted to handle a wide variety of synthetic resinous materials without predrying. The plasticating apparatus includes a two-stage screw rotatably and reciprocably mounted within a barrel. A surge suppressor is provided between the first and second stages and is comprised of an integral protrusion of the screw root and a deep channel section immediately preceding the protrusion. The surge suppressor prevents the surge of molten material into the vent area following the holding portion of an injection molding cycle, thereby allowing faster recovery and preventing bleeding of plasticized material from the vent opening.
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