Abstract: In order to reveal the mechanism of tire crown rubber abnormality during tire building process,take wide-base TBR tire 435/50R19.5 as the research object,which building process was simulated by numerical simulation.The tire 435/50R19.5 are 5 belts layers,among which the 0° cap plies winding technology was applied in belt3.The simulation including gluing of components on main drum,gluing of components on auxiliary drum,green tire and finalizing in vulcanizer.The reason of the tread rubber flowing abnormally was analyzed.The surface drum building method was developed to solve this problem,and the parameters of surface drum were determined by tire building simulation.The results of trial production show that the surface drum building method is useful in solving the rubber abnormally flow,and improving the manufacturing technology of wide-base tire.

Key words: wide-base tire, tire building simulation, viscoelasticity, 0°cap plies winding, rubber flow