Rotary kneading screw

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

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Details

366 90, B01F 708, B29B 714

Patent

active

050338609

ABSTRACT:
This invention relates to a rotary kneading screw installed in an extruder kneading and extrusion-molding a material mixture of a synthetic resin such as polyester resin mixed with one or more of master-batch, calcium carbonate, talc and carbon fiber. Progressively higher pressures are applied to the material mixture passing through a kneading section defined in the rotary screw. This rotary kneading screw is thus capable of kneading and extruding the material mixture in a large amount without deteriorating its physical properties and without lowering fluidity and molecular weight thereof even where the material mixture is difficult to knead.

REFERENCES:
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patent: 4444507 (1984-04-01), Dray
patent: 4525073 (1985-06-01), Spinner
patent: 4639143 (1987-01-01), Frankland, Jr.
patent: 4798473 (1989-01-01), Rauwendaal

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