Device for adjusting the pressure of the plastic material in a screw extruder
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United States of America Patent
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Mar 19, 1996
Grant Date -
N/A
app pub date -
Oct 11, 1994
filing date -
Oct 11, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A throttle for the adjustment of the pressure of plastic material in screw extruders in which the throttle is a cylindrical plunger submerged in the melt flow in a melt channel. In order to eliminate dead spaces downstream of the throttle, the plunger is arranged in a symmetrical and displaceable manner in a rectangular melt channel and one or more through holes are provided in the plunger in the flow direction in the submerged region of the plunger.
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