運用田口法與模流分析進行模具流道設計以改善射出成形品之翹曲

Application of Taguchi Method and Simulation on the Design of Mould Runners to Reduce Warpage of Injection Molding Products

林毅韋(Yi-Wei Lin) ； 雒瑋群(Wei-Qun Lo) ； 蔡國銘(Kuo-Ming Tsai) ； 謝忠祐(Chung-Yu Hsieh)

《先進工程學刊》 3卷4期 (2008/10) Pp. 307-312

https://doi.org/10.29948/JAE.200810.0007

摘要

本研究主要是使用田口實驗設計規劃與Moldex-3D對於射出模具的新型特殊混合結構流道設計進行模流分析，以探討其對成形品翹曲之影響。實驗塑料使用光學級PMMA材料，藉由田口法規劃L9實驗，使用4個控制因子分別為擺設位置、結構形狀、結構長度、澆口形式。由實驗結果可得其最佳參數組合為兩側擺設、結構形狀為筒狀、結構長度為切齊、扇形漸縮澆口；在田口確認實驗中可得實驗翹曲量與預測值的誤差為2.03%。同時，與原流道分析結果比較，鏡片翹曲量可改善22.5%。由此可知，在流道中放入適當的特殊混合結構將可有效改善射出件之翹曲量。

關鍵字

翹曲 ； 模流分析 ； 模具設計

並列摘要

In this study, Taguchi empirical design and Moldex-3D are used to analyze a novel hybrid runner design for injection molds to investigate its effect on the warpage of the product. The polymer material used was optical grade PMMA. In the Taguchi L9 experimental design, the four controlling factors used are placement position, shape of structure, length of structure and gate style. The result of experiment revealed that the optimum combination of parameters was a placement at the sides, a cylindrical shape, an aligned length and a progressively reduced gate area. The error of warpage value for Taguchi confirmation experiment was 2.03% compared with the simulation value. Meanwhile, compared with the original design, the improvement in lens warpage can be as high as 22.5%. Therefore, placing special hybrid structure in the runner will effectively improve the warpage of the injection product.

並列關鍵字

warpage ； mold flow analysis ； mold design