BLADE KNIFE Russian patent published in 2004 - IPC

FIELD: shredding facilities. SUBSTANCE: invention is designed for shredding of products, raw materials and wastes. Proposed blades knife contains hub with seat hole on which blades are fitted. Said blades are parallelograms in cross section, with cutting edges on opposite surfaces. Area of brade cross section is reduced from hub to periphery by decreasing length of sides of parallelogram lying in plane of cutting and/or by decreasing acute angles of parallelogram from side of front and/or rear cutting surfaces. Blades can be curved to circumference along Archimedean spiral or logarithmic spiral. Blades of knife along cutting edges from side of cutting plane can be provided with projections in form of parallelogram or trapezium in cross section. Seat hole of knife can be made in form square or hexagon with common center and combined through two opposite faces. EFFECT: improved cutting properties of knife, reduced energy consumption at shredding. 7 cl 24 dwg