Analysis of heat transfer during tire vulcanization

The heat transfer during the tire vulcanization was analyzed based on the heat transfer principle,the advantages of multi stage vulcanization were pointed out,and the effect of the heat diffusivity on the curing state of rubber and the effective factors on the heat diffusivity were investigated.The results showed that the curing time of product extended when the heat diffusivity decreased;the heat diffusivity of the compound,in which the addition level of carbon black was in the range of 25～40 phr,increased by 5% as the addition level of carbon black increased by every 1 phr.