基于响应面法的轮胎胎面挤出机机头流道结构参数优化

建立轮胎胎面挤出机机头流道几何模型，运用数值仿真方法对胶料在机头流道内的流场进行仿真分析；流道出口截面胶料流动速度方差为流动速度均匀性的评价指标，通过Plackett Burman（PB）试验方法从8个流道结构参数中筛选出3个关键结构参数（夹角A和B及出口宽度D）；采用中心复合设计（CCD）方法对3个关键结构参数对胶料挤出质量的影响规律进行分析，并经响应面法分析获得优化结构参数。结果表明：机头流道的3个关键结构参数A，B和D是影响胶料挤出质量的关键因素；优化流道结构能显著改善挤出胶料流动速度均匀性，提高胶料挤出质量。;The geometric model of the head runner of tire tread extruder was established, and the flow field of the compound in the head runner was simulated and analyzed by numerical simulation method.The compound flow velocity variance of runner outlet section was the evaluation dex of flow velocity uniformity.Three key structural parameters（angle A and B and outlet width D）were selected from eight runner structural parameters by Plackett Burman（PB）test method.The influence of three key structural parameters on the extrusion quality of the compound was analyzed by central composite design（CCD）method，and the optimized structural parameters were obtained by response surface methodology（RSM）.The results showed that three key structural parameters A，B and D of the head runner were the key factors affecting the quality of compound extrusion.Optimizing the runner structure could significantly improve the uniformity of the flow rate of the extruded compound and the extrusion quality