Double metering extruder screw and method of extrusion

Details Double metering extruder screw and method of extrusion Double metering extruder screw and method of extrusion

1980-08-28

1982-11-02

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264349, 366 79, 366 89, 425208, 526124, B29B 106

Patent

active

043572910

ABSTRACT:
A high output extruder screw which produces throughputs at lower temperatures and lower specific energy input. The screw has a feed section, a first short transition section, a first metering section, a second short transition section and a second metering section wherein the screw diameter increases from the feed section to the second metering section. There is also provided a method for extruding specific ethylene polymers.

REFERENCES:
patent: 2702410 (1955-02-01), Brown
patent: 3300810 (1967-01-01), Gregory et al.
patent: 3496603 (1970-02-01), Listner et al.
patent: 3712776 (1973-01-01), Woodham et al.
patent: 3767754 (1973-10-01), Manning et al.
patent: 3862265 (1975-01-01), Steinkamp et al.
patent: 3905588 (1975-09-01), Reinhart
patent: 4129386 (1978-12-01), Rauwendaal
patent: 4267146 (1981-05-01), Kurtz et al.
patent: 4282177 (1981-08-01), Kurtz et al.

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