活络模硫化轮胎沟底胶边的产生原因及改善措施

Cause Analysis and Improvement Measures of the Burr Defects in Groove of Tire Vulcanized by Movable Mold

分析轮胎花纹沟底胶边产生的原因,并提出相应的改善措施。结果表明,模具花纹筋头部变形和胎坯周长与模具花纹筋直径干涉是造成花纹沟底胶边的主要原因,控制模具花纹筋的缝隙精度和胎坯周长、采用切断阀代替单向阀以保持硫化机的定型压力、设置防咬胶结构的模具,可有效改善沟底胶边问题。

The causes for the burr defect in the tire grooves were analyzed and the corresponding improvement measures were proposed.The results showed that the deformation of the mold rib head and the interference between the circumference of the green tire and the diameter of the mold rib were the main causes of the burr in groove of tire.The methods to solve the problem were to control the gap precision of the mold ribs and the circumference of green tire,use a shut-off valve instead of a one-way valve to maintain the building pressure of the curing press,and design a mold with an anti-sticking structure for clean release.