PRESS-PELLETISER Russian patent published in 2013 - IPC A23N17/00 

FIELD: process engineering.

SUBSTANCE: invention relates to fodder pelletisers and may be used in production of feed mill industry, agriculture, etc. Proposed device comprises housing with screw, compaction chamber and female die. Grinding chamber is arranged under loading hopper to accommodate two pairs of cylindrical rollers running at different rpm toward each other and having fine asymmetric flutes made on their surfaces. Pyramidal casing is arranged under lower pair of said rollers and provided with four spraying nozzles mounted on its every side. Said nozzle are used to spray moisture and fat-vitamin additives into initial ground stock and to stabilise its moisture content. Grinding chamber is communicated with compaction chamber via pyramidal casing. Compaction chamber accommodates shaft composed of two rigidly coupled parts. First part is provided with two tape spirals of larger and smaller diameters of opposite coiling made on cylindrical surface. Second part is provided with screw coils of constantly increasing thickness. Air pumping assembly is arranged inside compaction chamber said first and second shaft parts. Perforated sic is attached to screw shaft end. Female die has holes.

EFFECT: higher quality of grinding and mixing.

4 dwg