Extruder screw for minimizing the opposing pressure flow

Details Extruder screw for minimizing the opposing pressure flow Extruder screw for minimizing the opposing pressure flow

1986-01-31

1987-02-10

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

264349, 366 88, 425209, B29B 714

Patent

active

046420410

ABSTRACT:
This invention, in its preferred embodiment, relates to an improved extruder screw, for plastics and like materials, wherein said screw includes, in sequence, a (1) feed section, (2) transition section, and (3) metering section, and a plurality of back flow seals to minimize the pressure flow opposing the moving materials passing therealong. Preferably, said seals comprise a first length of flighting having a reduced pitch over that preceding said first length of flighting, and a second length of flighting having zero pitch.

REFERENCES:
patent: 3070836 (1963-01-01), DeHaven et al.
patent: 4118164 (1978-10-01), Wenger et al.
patent: 4129386 (1978-12-01), Rauwendaal
patent: 4171196 (1979-10-01), Maillefer
patent: 4310484 (1982-01-01), Blakeslee, III
patent: 4321229 (1982-03-01), Blakeslee, III et al.
patent: 4357291 (1982-11-01), Miller et al.

Affiliated with

Also associated with

Rating

Extruder screw for minimizing the opposing pressure flow does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Extruder screw for minimizing the opposing pressure flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extruder screw for minimizing the opposing pressure flow will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2361488