| 摘要 |
<p>A new plasticating apparatus including a rotating and reciprocating screw having a helical flight that is wrapped around a core, disposed within and cooperating with the inner wall of a heated barrel that substantially increases the melt quality of a polymeric material. This is accomplished by incorporating an increase in the helix angle of the primary flight at or after a taper terminus from the transition section along the metering section, in cooperationg with a stepped change in the root that terminates either upstream or downstream of the end of one complete revolution of the flight.</p> |
