COMBINED FEED EXTRUDER Russian patent published in 2002 - IPC

FIELD: equipment for reprocessing of raw cereal material. SUBSTANCE: extruder has casing, auger mounted in casing and equipped with head arranged at its end, and die with openings. Head is made in the form of impeller faced with its blades to die. Blades side surfaces are made spiral-shaped. Spiral torsion angle is opposed to auger channel torsion angle. Blade concave side has beveled portion arranged at an acute angle with respect to die surface. Upper outer end of blade is arranged at least at the level of auger outer diameter. Lower inner ends of blades do not reach auger shaft axis so that discontinuous opening is defined having diameter not exceeding that of die central opening. Outer edge of blade conforms in shape to space between auger end and die. Blade spacing and width of individual blade are reducing toward auger axis. Such construction prevents product from depositing in zone adjacent to die and enables feeding of extruded product toward die center. Extruder may be used for reprocessing of raw cereal material. EFFECT: increased efficiency and simplified construction. 4 dwg