METHOD OF AND INSTALLATION FOR INCLUDING HARD GRAINS INTO TIRE TREAD Russian patent published in 2001 - IPC

FIELD: tire industry. SUBSTANCE: invention relates to method of and installation for including hard grains into tire treads and separate rubber strips and tread blanks. Rubber blank is extruded in extruder to make tread strips of required shape to be continuously rolled in several layers of definite thickness onto pre- machined tire or other material (object). Tire or object so treated are subjected to shaping to form required pattern and cured. Peculiarity of proposed method is that hard grains are distributed (applied) according to preset configuration on at least part of surface of extruded rubber tread strip before rolling on of following layer onto pre-machined tire. Special device is used to provided required distribution of grains so that grains, after shaping and curing of tire, should be included into, shaped, i.e. patterned, wearing surface of tire tread. EFFECT: improved road- holdi9ng ability of vehicle of slippery roads. 11 cl, 9 dwg