【摘要】 以商用离心泵泵头为研究对象，运用Moldex3D模流分析软件对其注塑成型过程进行了模拟。根据产品的结构特点设置了三种浇口方案，通过对注塑过程的模拟分析选出最佳方案来获得模具设计思路并预测制品成型后可能存在的质量问题。结果表明，平衡进浇方案的制品具有最好的综合性能，制品的翘曲变形量为1.588 mm，体积收缩率为2.444%。确认最佳浇口方案后，将充填时间(A)、保压时间(B)、冷却时间(C)和模具温度(D)作为实验因素，采用田口法构建五因素四水平的正交试验来获得最佳工艺参数，并使用极差和方差分析对结果进行置信度检测。以翘曲总位移结果为主要权重对象，通过极差分析确定了成型参数的最优组合为A1B1C1D1，方差分析则验证了极差分析的结果置信度高于99%。相较于初始方案，制品的翘曲变形量从1.588 mm降低至1.214 mm，降低了23.6%；冷却时间降低至10 s，降低了40%。得知模流分析技术的使用让产品的质量和生产效率都得到了明显的优化，为预测塑件性能、降低生产成本、提高生产效率提供了一种可行的方式。更多还原

【Abstract】 The injection molding process of commercial centrifugal pump head was simulated by Moldex3D mold flow analysis software. Three gate schemes were set up according to the product’s structure characteristics,and the best scheme was selected through the simulation analysis of the injection molding process. The results show that the products with balanced pouring scheme have the best comprehensive properties,the warpage deformation is 1.588 mm and the volume shrinkage is 2.444%. After confirming the optimal gating scheme,the filling time(A),pressure holding time(B),cooling time(C),and mold temperature(D) were used as experimental factors. A five factor and four level orthogonal experiment was constructed using the Taguchi method to obtain the optimal process parameters,and confidence testing was performed on the results using range and variance analysis. Taking the total warpage displacement as the main weight object,the optimal combination of molding parameters was determined as A1B1C1D1through range analysis. Variance analysis verified that the confidence of the range analysis results was higher than 99%.Compared to the initial plan,the warping deformation of the product decrease by 23.6% from 1.588 mm to 1.214 mm,the cooling time diminish to 10 seconds,reduced by 40%. The use of mold flow analysis technology allows product quality and production efficiency have been significantly optimized,providing a feasible way for the prediction of plastic parts performance,reducing production costs and improving production efficiency.更多还原