聚丙烯单聚合物复合材料嵌件式注射成型过程的数值模拟

Numerical Simulation of Insert Injection Molding Process for Polypropylene Single-Polymer Composites

单聚合物复合材料(SPC)是基体和增强体来自同种聚合物的复合材料,具有密度小、界面粘接性好和回收成本低等优点。嵌件式注射成型可实现SPC的快速制备。为了检验加工温度窗口的大小,掌握型腔内部温度分布情况,文中使用Moldex3D软件模拟分析了聚丙烯单聚合物复合材料(PP SPC)嵌件式注射成型过程,比较了PP SPC嵌件式注射成型与PP注射成型的模拟结果,讨论了温度、黏度和翘曲变形情况。将不同熔融温度下数值计算得到的温度分布结果与实验样品照片进行了对比分析。研究结果表明,在180℃条件下嵌件式注射成型PP SPC,纤维不会熔融而能保持增强效果。

Single-polymer-composites （SPCs） are the class of composites with matrix and reinforcement made from the same polymer. Their advantages are reduced weight, superior mechanical properties and improving recyclability. Insert injection molding could realize the rapid production of SPCs. In order to determine the processing temperature window and obtain the temperature distribution inside the mold cavity, the insert injection molding process of PP SPCs was numerical simulated by the software Moldex3D. The simulated results of insert injection molding of PP SPCs and the injection molding of pure PP were comparatively analyzed. The distribution of temperature, viscosity, and warpage were all discussed. The temperature distribution under different injection temperature and experimental samples produced at the relative injection temperatures were comparatively analyzed. The results show that the fibers would not be melted and then could realize the function of reinforcement at the injection temperature of 180 ℃.