Method and apparatus for de-aerating viscous mixing stock

Details Method and apparatus for de-aerating viscous mixing stock Method and apparatus for de-aerating viscous mixing stock

1980-05-12

1983-05-10

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

241 29, 241 4611, 241 58, 241172, B02C 1900

Patent

active

043825575

ABSTRACT:
A de-aerating agitating mill, especially for paints, pigments and the like in which the mixing chamber is closed off from a discharge chamber which may be subjected to reduced pressure. The closure is effected by a separator device consisting of a central disk which is attached to the stirrer or agitator shaft and rotates in a hole within a stationary part of the casing. A narrow, annular gap between the periphery of the disk and the rim of the hole acts as an outlet channel through which the ground or mixed stock is extruded. The shear stresses exerted on the stock rupture the material and burst any air bubbles which are then removed by the vacuum.

REFERENCES:
patent: 2695755 (1954-11-01), Denovan et al.
patent: 3311310 (1967-03-01), Engels et al.
patent: 4129261 (1978-12-01), Engels et al.
patent: 4273295 (1981-06-01), Pollmann
Engels, U., "Improvement of the Efficiency of Wet Operating Agitating Mills through Full-Volume Utilization and Avoidance of Air Inclusions", Farse und Lack, vol. 10, 1969.

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