DEVICE TO PRODUCE MORTARS Russian patent published in 2011 - IPC B28C5/22 

FIELD: process engineering.

SUBSTANCE: invention relates to production of mortars. Proposed device comprises drum and its drive. Said drum is made up of five or more curved bands twisted in vertical plane and coiled vertically and bent along spiral lines in crosswise direction on barrel-like mandrel to produce screw lines of drum edges and screw bulged surface with curvature center inside said drum. Drum has also inside laps made up of screw blades extending over drum entire length, from inlet to outlet.

EFFECT: expanded performances.

8 dwg