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使用流体计算软件Polyflow,三维数值模拟某双复合胎面(TWD40/FS10)的共挤成型过程,分析了牵引速度对共挤出产品的影响,并将模拟结果与实际挤出产品进行对比,验证了模拟结果.研究表明:在两熔体入口流量不变且存在牵引速度时,垂直于挤出方向向上的速度分布是影响最终产品质量的关键因素;胀大比的减小主要是由牵引速度的增大引起而非壁面剪切的作用引起;在预测牵引速度范围内,所得模拟结果与实际挤出断面尺寸的最大相对误差为7.39%,在工程允许误差范围内,可以指导双复合胎面的实际生产.
Using the fluid flow calculation software Polyflow, three-dimensional numerical simulation of the co-extrusion process of a double composite tread (TWD40 / FS10) was carried out. The influence of the traction speed on the co-extrusion products was analyzed and the simulation results were compared with the actual extrusion products. The simulation results show that the velocity distribution perpendicular to the extrusion direction is the key factor affecting the quality of the final product when the flow rate of the two melts is constant and the traction speed exists. The reduction of swollenness ratio mainly depends on the traction speed The maximum relative error between the simulation result and the actual extrusion section size is 7.39% within the range of the predicted traction speed, which can guide the double composite tread The actual production.