| 摘要 |
<p>An axially elongated extruder screw (22) includes a screw body having an axially extending extruding portion defined by a feed section (F) at an inlet end of the screw, a metering section (M) at an outlet end of the screw and a barrier section (B) between thea feed and metering (M) sections. A first helical primary flight (42) extends about and is coaxial with the screw body along the length of the extruder screw (22). A second helical primary flight (48) extends at least part way along the feed section to the outlet end of the extruder screw (22). The barrier section (B) of the extruder screw defines first and second barrier flights positioned between the primary flights (42, 48) and cooperating therewith to form first and second melt (70, 76) and solids (56, 58) channels that extend along the barriers section (B) of the extruder screw (22).</p> |
