High performance extruder with a constant number of threads in the inlet and outlet regions of a transfer shearing section
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United States of America Patent
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Sep 15, 1992
Grant Date -
N/A
app pub date -
Apr 29, 1991
filing date -
Dec 14, 1990
priority date (Note) -
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Abstract
A pin transfer extruder is provided, wherein the pin-barrel and transfer mixing sections, which are known per se and have only been used individually hitherto, are jointly used in one extruder. Throttle pins, which are disposed in the transfer mixing section in the region of the greatest housing thread volume, permit universal use of the extruder in respect of the extruded material. The combination of both mixing systems permits the throughput of material to be increased in a surprising manner by 60% to 100%, while a constant mixing quality is maintained and the driving torque is halved. The number of the housing and screw flights remains independent of the cross-sectional area of the housing and screw threads because the number of housing and screw threads is constant.
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