Extruder screw with balanced flights of different functional sec

Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor

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Details

366323, B01F 708, B29B 106

Patent

active

047984724

ABSTRACT:
A plasticating extruder with a screw having a feed section, a transition section, a metering section, a first primary flight located substantially in the first two sections, a second primary flight located substantially in the last two sections and two corresponding secondary flights located in the transition section, all the flights in the latter section radially balancing each other, and the first primary flight in the feed section balancing radially the second primary flight in the metering section. In another embodiment, the screw can in addition have a mixing section and another metering section, the latter having a flight balancing radially other flights in other sections.

REFERENCES:
patent: Re28901 (1976-07-01), Kim
patent: 3897938 (1975-08-01), Kim
patent: 4405239 (1983-09-01), Chung et al.
patent: 4472059 (1984-09-01), Klein et al.
patent: 4729662 (1988-03-01), O'Brien
patent: 4733970 (1988-03-01), Yokana
Society of the Plastics Industry, Plastics Engineering Handbook of the Society of Plastic Industry Inc., New York, Van Nostrand Reinhold Co., 1976, p. 161.

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