微发泡注塑成型对厚壁篮球板的轻量化分析

Lightweight Analysis of Thick Wall Basketball Board by Micro-foam Injection Molding

为实现厚壁篮球板轻量化,利用Moldflow对厚壁篮球板的微发泡注塑成型过程进行模拟分析。基于单因素实验,利用正交试验法得到最优成型参数组合。结果表明:基于玻纤增强聚丙烯(GFPP)的性能,在选定的工艺参数中,熔体温度、模具温度、注射时间、气体初始浓度对质量的影响较大。利用单因素实验结果,确定正交试验因素水平。正交试验得出的最优工艺参数组合为熔体温度230℃,模具温度70℃,注射速率32 cm^(3)/s,气体初始浓度2%。最优工艺参数组合下,厚壁篮球板的质量为19 996 g,相比优化前降低14.8%。翘曲翘曲值为1.234 mm,相比优化前降低22.0%。实际验证结果表明,通过最优参数得出的制件整体质量较好,可以用于实际生产。

In order to realize the lightweight of the thick-walled basketball board, Moldflow is used to simulate and analyze the micro-foam injection molding process of the thick-walled basketball board. Based on the single factor experiment, the orthogonal experiment method is used to obtain the optimal molding parameter combination. The results show that based on the properties of glass fiber reinforced polypropylene(GFPP), among the selected process parameters,melt temperature, mold temperature, injection time, and initial gas concentration have a greater impact on quality. Use the results of single factor experiments to determine the level of orthogonal experiment factors. The optimal combination of process parameters obtained by the orthogonal experiment is a melt temperature of 230 ℃, a mold temperature of 70 ℃,an injection rate of 32 cm^(3)/s, and an initial gas concentration of 2%. Under the optimal combination of process parameters,the mass of the thick-walled basketball board is 19 996 g, which is 14.8% lower than before optimization. Warpage The warpage value is 1.234 mm, which is 22.0% lower than before optimization. The actual verification results show that the overall quality of the parts obtained through the optimal parameters is good and can be used in actual production.