Manufacturing Process Optimization of Short Glass Fiber Reinforced Polycarbonate Composites in Injection Molding
Manufacturing Process Optimization of Short Glass Fiber Reinforced Polycarbonate Composites in Injection Molding
复制标题
短玻璃纤维增强聚碳酸酯复合材料注射成型制造工艺优化
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
J. Doong
中科院分区：
文献类型：
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作者：
Shih;J. Hwang;J. Doong
提出了一种快速有效的短玻璃纤维增强聚碳酸酯复合材料注射成型工艺参数优化方法。考虑了填充时间、熔体温度、模具温度和冲压速度等注塑工艺参数。该方法结合了田口法和CAE流动模拟软件的使用，该软件用于模拟注射成型过程并预测纤维方向。该方法可以取代传统的“一次改变一个参数”的方法，这种方法效率低，成本高，耗时长，几乎无法得到最优解。同时，利用扫描电镜对纤维进行微观结构分析，确定纤维取向和剪切层厚度，验证CAE模拟结果。结果表明：在不同的注射成型条件下，从表面到芯层可分为冻结层、剪切层和芯层；纤维取向在冻结层和芯层与熔体流动方向垂直，在剪切层与熔体流动方向相反。通过CAE分析，我们得到了最优的工艺参数，以获得我们的目标最厚剪切层。
This paper presents a fast and effective methodology for optimization injection molding process parameters of short glass fiber reinforced polycarbonate composites. Various injection molding parameters such as filling time, melt temperature, mold temperature and ram speed were considered. The methodology combines the use of Taguchi approach and a CAE flow simulation software which was used to simulate the injection molding process and to predict the fiber orientation. This method can replace the traditional "change-one-parameter-at-a-time" approach which is very inefficient, costly, time consuming and almost impracticable to yield an optimum solution. In the mean time, the microstructures were examined with a scanning electron microscopy to determine the fiber orientation and shear layer thickness to check the results of CAE simulation. The results indicated that three distinct layers (frozen layer, shear layer and core layer) are observed from surface to core at various injection molding conditions. The fiber orientation is perpendicular to the melt flow direction in frozen layer and core layer, but it has the opposite direction in shear layer. From the CAE analysis, we have gotten the optimum process parameters to obtain the thickest shear layer that was our target.