载重子午线轮胎内温疏水阀自动排凝硫化工艺研究

Study on Internal Curing Process of Truck and Bus Radial Tire with Automatic Condensation Discharge

研究内温疏水阀自动排凝硫化工艺对载重子午线轮胎硫化质量和能耗的影响。结果表明:相对于采用切断阀定时排凝硫化工艺,采用疏水阀自动排凝硫化工艺且在蒸汽/氮气转换段边通氮气边排凝,轮胎硫化程度均一性提高,能耗下降约50%,轮胎耐久性能提升约4%,滚动阻力系数不变,但疏水阀过滤网需定期进行维护保养,以免出现疏水阀堵塞和密封性能不佳的问题。

The effect of automatic condensation discharge with drain valves on the vulcanization quality and energy consumption of truck and bus radial tires with internal curing process was studied.The results showed that compared with the curing process using timed condensation discharge of cut-off valves,the curing process with automatic condensation discharge of drain valves enabled the condensation discharge at the same time of nitrogen input in the steam/nitrogen conversion stage,the cured tires had higher homogeneity of the cure degree,the energy consumption was reduced by about 50%,and the tire durability was improved by about 4%while the rolling resistance coefficient was kept the same.However,the filter screen of the drain valve needed regular maintenance to avoid the problems of blockage and poor sealing performance of the drain valve.