长纤维增强丙烯腈-苯乙烯复合材料注塑成型与工艺优化

Optimization of Injection Molding Process for Long-Fiber Reinforced Acrylonitrile-Styrene Composi

以含量为30%的玻璃纤维(GF)增强聚丙烯腈-苯乙烯(AS)复合材料(GFAS)注塑成型为研究对象,选取塑化温度、注射速度、保压压力及模具温度为因子,以拉伸强度、弯曲强度及缺口冲击强度作为评价指标设计了正交实验。极差分析与方差分析的结果表明,注射速度对拉伸强度的影响最显著,保压压力显著影响材料的弯曲强度和缺口冲击强度。根据正交实验的分析结果进行了保压压力和注射速度的单因素实验,得到最佳的工艺参数组合为塑化温度为250℃、注射速度为50%、保压压力为75MPa与模具温度为65℃,此时,标准样条的拉伸强度为143.4MPa,弯曲强度为199.9MPa,缺口冲击强度为19.2kJ/m^(2),通过优化注塑工艺参数提高了复合材料(GFAS)的综合力学性能。

To optimize the injection molding process of glass fiber reinforced acrylonitrile-styrene composite material(GFAS)with glass fiber content of 30%.The Taguchi experiments were designed by selecting the processing temperature,injection speed,holding pressure and mold temperature as factors,and taking tensile strength,flexural strength and notched impact strength as evaluation indicators.The results of range analysis and ANOVA showed that injection speed had the most significant effect on tensile strength,and packing pressure could also significantly affect the flexural strength and notched impact strength of the composite.According to the analysis results,a single-factor experiment of packing pressure and injection speed was carried out,and the final optimal combination of process parameters was:processing temperature 250℃,injection speed 50%,packing pressure 75 MPa,mold temperature 65℃,the tensile strength of the material was 143.4 MPa,the flexural strength was 199.9 MPa,and the notched impact strength was 19.2 kJ/m^(2),which improved the mechanical properties of the composite(GFAS)by optimizing the injection molding process parameters.