Tran Ngoc Tu, Seefried Andreas, Gehde Michael
Department of Mechanical Engineering, Chemnitz University of Technology, 09126 Chemnitz, Germany.
Department of Mechanical Engineering, University of Transport and Communications (Trường Đại học Giao thông Vận tải), No.3 Cau Giay Street, Lang Thuong Ward, Dong Da District, Hanoi 100803, Vietnam.
Polymers (Basel). 2023 Feb 28;15(5):1244. doi: 10.3390/polym15051244.
A completely opposite injection molding filling behavior of thermosets and thermoplastics by an effective and useful method developed by the authors was found. Specifically, for the thermoset injection molding, there is a strong slip between the thermoset melt and wall surface, which is not found for the injection molding of thermoplastic materials. In addition, the variables, such as the filler content, the mold temperature, the injection speed, and the surface roughness that could lead to or influence the slip phenomenon of thermoset injection molding compounds, were also investigated. Furthermore, microscopy was conducted to verify the correlation between the mold wall slip and fiber orientation. The results obtained in this paper open challenges in the field of the calculation, analysis, and simulation of mold filling behavior of highly glass fiber-reinforced thermoset resins in the injection molding process with consideration of wall slip boundary conditions.
作者开发了一种有效且实用的方法，发现了热固性塑料和热塑性塑料完全相反的注塑填充行为。具体而言，对于热固性注塑成型，热固性熔体与壁面之间存在强烈的滑动，而热塑性材料的注塑成型中未发现这种情况。此外，还研究了诸如填料含量、模具温度、注射速度和表面粗糙度等可能导致或影响热固性注塑成型复合材料滑动现象的变量。此外，进行了显微镜观察以验证模具壁面滑动与纤维取向之间的相关性。本文所得结果为在考虑壁面滑动边界条件的注塑成型过程中，对高玻璃纤维增强热固性树脂的模具填充行为进行计算、分析和模拟领域带来了挑战。
