METHOD FOR REPROCESSING OF WORN-OUT TIRES Russian patent published in 2000 - IPC

FIELD: repressing of worn-out tires and production of secondary raw material from them. SUBSTANCE: the method provides for sorting of tires, high-speed milling, forming of articles, chopping of waste to the respective sizes, crushing of crumb rubber, magnetic separation and screening. Shearing of the tread with simultaneous separation of tire into two sidewalls and tread union and milling of the sidewalls separated from the tread unions are accomplished by high-speed milling. The cutting speed is within 20 to 30 m/s. The depth of cutting and feed are selected processing from the volume of rubber per mill cutting member within 0.5 cu.mm/tooth cu. mm/tooth, where D - tire diameter, n-number of revolution of tire per unit of time, n₁-number of revolutions of mill per unit of time, n₂-number of mill cutting members (teeth), h-depth of cutting, mm, t-feed, mm/rev of tire. The obtained crumb rubber has a high dispersity. EFFECT: enhanced ecological purity, minimized consumption of power. 2 cl, 3 dwg