Batch mixer and mixing rotor used in the same

Details Batch mixer and mixing rotor used in the same Batch mixer and mixing rotor used in the same

2005-11-02

2010-12-21

Sorkin, David L (Department: 1797)

Agitating

Rubber or heavy plastic working

Stationary mixing chamber

C366S076700

Reexamination Certificate

active

07854542

ABSTRACT:
A plurality of mixing rotors that are housed in a chamber having a cocoon-shaped cross section in a tangential non-intermeshing state, where a plurality of long wings and short wings are provided on a wing portion of the mixing rotors. The long wings and the short wings severally have a plurality of different sizes of tip clearances, a twist angle of the long wings is changed in the axis direction, and makes mixing efficiency and dispersion efficiency compatible. Further, cooling medium paths are provided severally in the chamber and the mixing rotors to suppress excessive increase of the temperature of mixing materials. According to a batch mixer using the mixing rotors, it is possible to control quality reduction of the mixing materials caused by heat generation, and to improve the productivity by increasing the number of the wings without diminishing inherent processing performance of the mixer.

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N. I. Shikhirev, et al., “Influence of the gap between the wall of the mixing chamber and the top of the rotor blade of an internal mixer on the effectiveness of rubber mix formation”, International Polymer Science and Technology, vol. 19, No. 2, XP-000276028, Jan. 1992, pp. T3-T5.

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