Extruder for poorly miscible extrudates

Details Extruder for poorly miscible extrudates Extruder for poorly miscible extrudates

1991-12-13

1993-09-14

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

26421121, 26421123, 366 88, 366 90, B29C 4762, B29C 4764

Patent

active

052443736

ABSTRACT:
An extruder for poorly miscible extrudates which includes a pin-lined barrel section and a transfer mixing section used together. Restricting pins are arranged in the transfer mixing section in the region of the greatest barrel channel volume and permit universal use of the extruder with respect to the extrudate. The combination of the two mixing systems allows in a surprising way an increase in the material throughput of 60% to 100% with the mixing quality remaining the same and a halving of the drive torque. Due to a constant number of channels of the barrel channels and screw channels, the number of barrel flights and screw flights remains independent of the channel cross-sectional area of barrel and screw. A helical barrel groove in the feed zone of the extruder barrel additionally improves the mixing quality of the extrudate and the output of the extruder.

REFERENCES:
patent: 3613160 (1971-10-01), Loomans et al.
patent: 4178104 (1979-12-01), Menges et al.
patent: 4569595 (1986-02-01), Maillefer
patent: 4581992 (1986-04-01), Koch
patent: 4735565 (1988-04-01), Capelle
patent: 5127741 (1992-07-01), Capelle et al.
patent: 5141426 (1992-08-01), Capelle
patent: 5145352 (1992-09-01), Capelle et al.
patent: 5147198 (1992-09-01), Capelle

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