Wet pelleter having variable annulus between shell and shaft

Details Wet pelleter having variable annulus between shell and shaft Wet pelleter having variable annulus between shell and shaft

1978-01-23

1979-07-24

Spicer, Jr., Robert L.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Agitating to form larger particles

425222, 422242, 422256, C09C 156

Patent

active

041622863

ABSTRACT:
A wet pelleting apparatus essentially comprises a cylindrical shell and a shaft having pelleting pins affixed thereto, usually in a helical arrangement. In cross-sectional area taken at right angles to the axis of the shaft which is substantially concentrically disposed within the shell, the annulus formed between the shaft and the configuration given to it and the shell inner wall and the configuration given to it decreases and increases as the plane of cross-section is moved from the feed end of the apparatus to the discharge end thereof. In one embodiment, the shaft has an undulating or repetitive hourglass configuration and the inner wall of the shell is rectilinear. In another, the inner wall of the shell can be given an undulating configuration. In a third, both the wall and shaft surfaces can be formed so as to cause, according to the invention, alternate compression and decompression of particles being pelleted. The invention is described in connection with the wet pelleting of carbon black with water.

REFERENCES:
patent: 2920344 (1960-01-01), Stirling
patent: 2984860 (1961-05-01), Thomas
patent: 3161707 (1964-12-01), Stirling
patent: 3579717 (1971-05-01), Middlebrooks
patent: 3674437 (1972-07-01), Austin et al.

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