Melt-sealing device for extruders for the processing of thermopl

Details Melt-sealing device for extruders for the processing of thermopl Melt-sealing device for extruders for the processing of thermopl

1994-09-28

1996-02-13

Cooley, Charles E.

Agitating

Rubber or heavy plastic working

With specified feed means

366 82, 366 88, 366 89, 366 90, B28C 704, B29B 742

Patent

active

054907250

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.

REFERENCES:
patent: 2835514 (1958-05-01), McGahan
patent: 3360824 (1968-01-01), Schippers
patent: 3814779 (1974-06-01), Wiley
patent: 3917507 (1975-11-01), Skidmore
patent: 4447156 (1984-05-01), Csongor
patent: 4573799 (1986-03-01), Anders
patent: 4652138 (1987-03-01), Inoue et al.
patent: 4708623 (1987-11-01), Aoki et al.
patent: 4729666 (1988-03-01), Takubo
patent: 4867927 (1989-09-01), Funaki et al.

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