橡胶轮胎部件挤出过程数值模拟分析  

Numerical Simulation Analysis of the Extrusion of Tire Rubber Part

作　　者：李永超[1] 高雪芹[1] 杨其[1] 邓聪[2] 张国翔[3] 王海[3] 胡湘琦[3] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]四川大学分析测试中心,四川成都610065 [3]贵州轮胎股份有限公司,贵州贵阳550000

出　　处：《高分子材料科学与工程》2016年第3期108-112,共5页Polymer Materials Science & Engineering

基　　金：2015基本科研川大-泸州(2082604184274)

摘　　要：以某轮胎部件胶料的挤出过程为研究对象,采用Phan-Thien-Tanner(PTT)本构方程对挤出过程进行三维等温数值模拟。分析了胶料在挤出机内的流动情况,并考察分析壁面滑移系数、流量和牵引速率对出口速率分布和挤出胀大的影响。结果表明,在自由挤出的条件下,壁面滑移程度对胶料离开口模时的速率分布影响较大,主要表现为对挤出胀大的影响,而流量的变化对挤出胀大的影响较小;当施加牵引时,随着牵引速率的增加,挤出胀大比减小,当牵引速率超过一定范围后会导致挤出物的形状发生畸变。Taking the extrusion process of tire rubber part as study object, the three-dimensional isothermal numerical simulation of the extrusion process was conducted by using Phan-Thien-Tanner constitutional equation. The 3-D flow situation of the rubber compound in the extruder was studied. In addition, the influence of wall slip coefficient, flow rate and drawing rate on the shape of extrudate and the velocity distribution at the end cross section of the die were investigated. The simulation results show that, under free extrusion conditions, the wall slip coefficient has a significant effect on the velocity field and the shape of the exits, while the flow rate has relatively little impacts on it. Under the traction conditions, the swell ratio reduces with an increasing drawing speed within a certain range, and the extrudate is serious deformed when the drawing speed is out of the range.

关 键 词：挤出成型 数值模型 速度分布 挤出胀大 

分 类 号：TQ330.66[化学工程—橡胶工业]