Multi-shaft extruder screw bushing and extruder

Details Multi-shaft extruder screw bushing and extruder Multi-shaft extruder screw bushing and extruder

1999-02-05

2000-09-12

Soohoo, Tony G.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366 79, B21C 106, B29B 714, B29B 720

Patent

active

061167711

ABSTRACT:
A single flighted multi-screw conveying bushing that has only one helical screw element extending the length of the bushing. The bushing has a cross-section shape that has a segmented circular base and a lobe extending from the base. The lobe has a truncated crest that is sized to have a circumferential angle of from 15.degree. to 30.degree. and preferably from 22.degree. to 24.degree.. Also, a twin screw extruder having a pair of side by side drive shafts with at least two of the single flighted screw bushings mounted end to end on each shaft.

REFERENCES:
patent: 1356296 (1920-10-01), Casse
patent: 2434707 (1948-01-01), Marshall
patent: 2441222 (1948-05-01), Fuller
patent: 3254367 (1966-06-01), Erdmenger
patent: 5372418 (1994-12-01), Biesenberger et al.
patent: 5487602 (1996-01-01), Valsamis et al.
patent: 5573332 (1996-11-01), Weihrich et al.

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