TWO-SIEVE SIZING TROMMEL OF DRUM MILL Russian patent published in 2009 - IPC B02C17/18 B07B1/22 

FIELD: machine building, food industry.

SUBSTANCE: two-sieve sizing trommel of drum mill comprises two coupled concentric rotary drums with the orifices. Note here that those of inner drum are larger than outer drum orifices. Note also that the mill outlet communicates with the inner drum. Drum inner surfaces have pins representing truncated cones arranged between aforesaid orifices spaced apart along helical line. Distance between pin taper centers of inner drum makes 0.5 to 1.25 of the outer drum orifice rating. Distance between outer drum pin taper centers makes 2.5 to 3.5 of the outer drum orifice ratings. Pin taper generating lines are inclined towards their axes for 3 to 10 degrees.

EFFECT: higher quality of sizing.

2 cl, 3 dwg