Numerical Modelling of Microcellular Foaming Injection Moulding

IF 0.7 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
J. Nabiałek, T. Jaruga
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引用次数: 0

Abstract

The results of computer modelling of an injection moulding process with microcellular foaming (MuCell®) were presented in this work. The process is based on the dissolving nitrogen in a liquid polymer which is possible when nitrogen is in supercritical fluid state (SCF). After pressure drop of the melt in the injection mould the intensive nucleation of pores occurs and, as the result, the material with high concentration of small pores is created. The pores obtained in this way are of much smaller size than in a conventional foaming process. The pore size in the cross-section of an exemplary injection moulded part was calculated in the computer modelling and compared to the results of microscopical investigation made on the real injection moulded part. It was found that the size of the pores depends on the flow length inside the injection mould and on the position in the part’s cross-section.
微孔发泡注塑成型的数值模拟
这项工作介绍了微孔发泡(MuCell®)注塑工艺的计算机建模结果。该工艺基于氮气在液态聚合物中的溶解,当氮气处于超临界流体状态(SCF)时才有可能实现。熔体在注塑模具中降压后,会产生密集的孔核,从而形成具有高浓度小孔的材料。与传统发泡工艺相比,这种方法产生的孔隙要小得多。在计算机建模中计算了一个注塑件横截面上的孔隙大小,并与实际注塑件的显微镜检查结果进行了比较。结果发现,孔隙的大小取决于注塑模具内的流动长度和部件横截面上的位置。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Archives of Metallurgy and Materials
Archives of Metallurgy and Materials 工程技术-冶金工程
CiteScore
1.20
自引率
0.00%
发文量
0
审稿时长
4.5 months
期刊介绍: The Archives of Metallurgy and Materials is covered in the following Institute for Scientific Information products: SciSearch (the Science Citation Index - Expanded), Research Alert, Materials Science Citation Index, and Current Contents / Engineering, Computing and Technology. Articles published in the Archives of Metallurgy and Materials are also indexed or abstracted by Cambridge Scientific Abstracts.
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