基于Polyflow的增强尼龙涡轮增压储气管成型质量仿真研究

Simulation Study on Molding Quality of Enhanced Nylon Turbocharged Gas Storage Pipe Based on Polyflow

汽车涡轮增压储气管采用尼龙加玻璃纤维材料挤出吹塑成型制得,其最大的成型缺陷就是挤出吹塑过程壁厚不均匀导致制件发生翘曲,严重影响制件的成型质量。通过Polyflow软件模拟储气管成型过程发现其存在的缺陷,通过响应面法对其成型工艺参数进行了优化,通过Minitab软件制作质量控制图,对其CPK值进行分析,对制件成型质量做出评估,并通过优化改进提高CPK值,从而提高产品成型质量。实验结果表明:通过响应面法优化后较佳的成型工艺参数为吹胀压力为0.11 MPa,型坯初始温度为256.20℃,型坯初始壁厚为0.003 m,该工艺条件下制件CPK值为1.52,成型质量较好。

The automobile turbocharged air storage tube is made of nylon and glass fiber material by extrusion blow molding.The biggest molding defect is that the uneven wall thickness of the extrusion blow molding process causes the parts to warp,which seriously affects the molding quality of the parts.The polyflow software was used to simulate the forming process of the gas storage tube and found its defects,and the response surface method was used to optimize the forming process parameters.The quality control chart was produced by Minitab software,and the CPK value was analyzed to evaluate the forming quality of the parts.,And improve the CPK value through optimization and improvement,thereby improving the quality of product molding.The experimental results show that the optimal molding process parameters after optimization by response surface method are the inflation pressure of 0.11 MPa,the initial temperature of the parison is 256.20℃,the initial wall thickness of the parison is 0.003 m,and the CPK value of the part under this process condition1.52,better molding quality.