應用模流分析探討精密金屬牙套製程參數優化之研究

金屬射出成型是改善傳統粉末冶金缺點而發展出來的新興技術，用於製造各種複雜形狀之產品，過去影響產品的品質，主要依賴經驗累積與及數次試誤。本研究探討精密金屬牙齒矯正器利用CAE軟體之模流分析及射出成型模式，以數值解析方式配合實驗，尋找最佳製程條件與模具設計。主要藉由Moldex3D軟體進行不同的流道設計、材料、熔膠溫度、充填壓力與充填時間的模擬分析。由分析結果得知，射出成型製程較佳化參數為熔膠溫度180℃、保壓力121MPa、充填時間1.5秒、模溫35℃，其翹曲變形量0.2mm。比較射出壓力與翹曲位移量值，再將分析結果回饋給現場進行成品的品質改善，並經牙齒矯正器成型實例驗證，搭配模流分析軟體Moldex3D確實有效地達成減少模具成本，滿足產業界對產品的品質、速度和精確性的要求。

關鍵字

金屬射出成型；翹曲變形；齒科矯正器

並列摘要

Metal Injection Molding (MIM), which is used to manufacture various and complex shapes of products, is a newly emerged technology to improve the shortcomings of the traditional powder metallurgy. From the beginning, the quality of MIM products mainly depended on trial and error tests. The purposes of this study are to determine the optimization processing and to investigate mold design of metal braces by the mold flow analysis software (Moldex3D) used to numerically simulate processing parameters such as injection pressure, runner designs, material, melt temperatures, filling pressures and time. Testing results show that the optimal conditions are set for the filling time 1.5 sec, melt temperature 180°C, mold temperature 35°C, and packing pressure 121MPa in order to obtain warpage less than 0.2 mm. Therefore, these results can be provided to the injection machine operators to make sure better quality of the product achieved by verifying dental braces comparison with software simulation and analysis to effectively cost down during mold development and to meet the customers' requirements on quality, speed and precision.

並列關鍵字

Moldex3D ； metal injection molding ； warpage ； dental braces

國際替代計量

應用模流分析探討精密金屬牙套製程參數優化之研究

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