Screw-type extrusion granulating apparatus, especially for produ

Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Means forming from bulk and downstream severing means

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264142, 425308, 425461, 425464, 425DIG230, B29C 4700

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active

052404005

ABSTRACT:
A screw-type front extrusion granulating apparatus for forming moistened powdered raw material such as chemicals for use in the agriculture, pharmaceutical, or food industries into granules, has a conveying screw in axial alignment with a semi-spherical die, the die having a plurality of die openings formed therein. The conveying screw has an extrusion blade mounted to its forward end to project into the confines of the semi-spherical die, the contour of the extrusion blade generally conforming to the inner surface of the die. In operation, the moistened powdered material is transported forwardly under pressure by the screw and extruded through the die utilizing the pressure of the screw and the scraping action of the extrusion blade.

REFERENCES:
patent: 3304578 (1967-02-01), Clute
patent: 3337913 (1967-08-01), List
patent: 3362044 (1968-01-01), Irving
patent: 3688544 (1972-09-01), Sagmuller et al.
patent: 3973890 (1976-08-01), Porter et al.
patent: 4451414 (1984-05-01), Rossiter
patent: 4465447 (1984-08-01), Cheigh et al.
patent: 4465451 (1984-08-01), Adderley, Jr.
patent: 4496298 (1985-01-01), Muench
Fuji Paudal Co., Ltd. "Advanced Engineering XTRUDER" brochure, pp. 1-7, Nov. 3, 1979.

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