Screw-type extruder for polyvinylidene fluoride filaments

Details Screw-type extruder for polyvinylidene fluoride filaments Screw-type extruder for polyvinylidene fluoride filaments

1980-02-22

1981-07-28

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

264176F, 366323, 425 71, B29B 106

Patent

active

042808022

ABSTRACT:
An apparatus for the continuous manufacture of filaments from polyvinylidene fluoride includes a screw extruder with a single-spindle screw surrounded by a coaxial barrel with a feed zone, a compression zone, a metering zone, and a mixing head zone for the plasticizing of the polyvinyldene fluoride and with a die outlet tool for shaping the filaments. The compression ratio of the screw is 1:1.2 to 1:2.5, and the screw is provided with single-flight and double-flight sections of identical pitch in alternating succession in the region of the compression zone. The mixing head zone is fashioned as alternatingly successive mixing zones and shear zones, of which there are provided, respectively, two to four zones and preferably three zones.

REFERENCES:
patent: 3248469 (1966-04-01), Kosinsky et al.
patent: 3664795 (1972-05-01), Heinz et al.
patent: 3676034 (1972-07-01), Wendricks
patent: 3867079 (1975-02-01), Kim
patent: 3913897 (1975-10-01), Hansilk
patent: 3941860 (1976-03-01), Couchoud et al.
patent: 4015832 (1977-04-01), Kruder
patent: 4092015 (1978-05-01), Koch
patent: 4129386 (1978-12-01), Rauwendaal
patent: 4173417 (1979-11-01), Kruder

Affiliated with

Also associated with

Rating

Screw-type extruder for polyvinylidene fluoride filaments does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Screw-type extruder for polyvinylidene fluoride filaments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screw-type extruder for polyvinylidene fluoride filaments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-547594