SCREW CONVEYOR Russian patent published in 1998 - IPC

FIELD: mechanical engineering; extrusion machines and mechanisms. SUBSTANCE: device has mechanical drive, storage hopper and shaft with screw projections and recesses whose outlet end is enclosed in cylindrical chute with product outlet die. Recesses of outlet section are made with depth smaller than that of feed section passing through storage hopper. generating line on which apices of outlet section recesses lie satisfy the following equation r = [R-K(R-R₁)]-Xtgα where r is radius of outlet section recesses, mm; R is radius of shaft projections, mm; R₁ is radius of feed section recesses, mm; K is coefficient, equal to 0.5-0.7, characterizing the depth of outlet section recesses; α is angle of inclination of generating line on which outlet section recesses lie to generating line of feed section recesses, equal to 0-5 degrees; X is running coordinate of outlet section length changing within 0 and L where l is length of outlet section, mm. EFFECT: increased capacity. 3 dwg