Melt-sealing device for extruders for the processing of thermoplastic polymers or rubber
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United States of America Patent
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Feb 13, 1996
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N/A
app pub date -
Sep 28, 1994
filing date -
Sep 30, 1993
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Abstract
A melt-sealing device for extruders for thermoplastic polymers or rubber for sealing off the gear unit side against high-melt pressure, in which sealing is effected by the configuration of the extruder screw which includes an intake section, a compression section having a channel depth that decreases in the conveying direction, a metering section with a constant screw channel depth, a smooth annular melt channel section, and a blister element with an annular gap for the sealing melt.
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