玻纤增强型聚碳酸脂注塑成型参数优化及超声波辅助成型研究  

Glass fiber reinforced polycarbonate injection molding parameters optimization and ultrasonic assisted forming research

作　　者：魏莎莎 林哲乔 胡盛财 林荣川 WEI Shasha LIN Zheqiao HU Shengcai LIN Rongchuan(College of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, China College of Science,North China University of Technology, Beijing 100041, China)

机构地区：[1]集美大学机械与能源工程学院,福建厦门361021 [2]北方工业大学理学院,北京100041

出　　处：《武汉大学学报（工学版）》2017年第5期766-773,789,共9页Engineering Journal of Wuhan University

基　　金：厦门市科技计划项目(编号:3502Z20153015;3502Z20143023);福建省重点科技项目(编号:2014H0032)

摘　　要：以熔体流动方向上压力损失较大且扁平较薄的伞钩形聚碳酸酯塑件为对象,通过计算机辅助工程(CAE)数值模拟仿真设计模具的浇注系统,与正交实验方法相结合优化薄壁注塑成型中的工艺参数.通过控制注射压力以实现熔体短射的方法分别在未施加和施加不同功率超声波的作用下进行注塑成型,对成型制件质量、拉伸强度、芯层玻纤取向、熔点进行检测.结果表明:超声波有利于提高玻纤增强型聚碳酸脂的型腔填充率;改善了塑件中玻纤沿熔体流动方向的取向性,使得塑件力学性能提升;用差示扫描量热法进行热分析发现施加和未施加超声波作用成型塑件的玻璃化温度变化幅度很小.The umbrella hook molded polycarbonate （PC） part who has thin flat shape and large pressure lose on the melt flow direction is regarded as the research object, combining with computer aided engineering （CAE） simulation, the mold gating system is designed and the best injection molding process parameters except injection pressure are achieved by means of orthogonal experiment. The plastic injection molding is conducted in both no exerting and exerting ultrasound. The quality of molding parts, tensile strength, glass fiber orientation of core layer and melting point are tested. The results show that ultrasound is helpful to improve the cavity fill rates of glass fiber reinforced PC; the mechanical performances are improved because of ultrasound＇s helpful to the glass fiber orientation of forming parts; thermal analy- sis is conducted by using differential scanning calorimeter; it is shown that the change of the glass transition temperature is very small regardless of exerting ultrasound or not.

关 键 词：玻纤增强型聚碳酸脂 注塑成型 超声波 成型塑件性能 

分 类 号：TH145[一般工业技术—材料科学与工程]