澆口設計對電纜固定頭的射出
成形品質研究

塑膠件的設計大都為形狀複雜且多變化，因此模具設計就顯得格外重要，如：澆口位置、澆口大小、流道斷面形狀與大小等。本研究針對中空圓柱形、且有三個階級的不同肉厚之塑膠製品，探討一模六穴之流動平衡問題，以及模具的澆口位置、澆口截面積大小對於產品尺寸與外觀的影響。研究結果顯示，澆口若設計在製品較薄的位置，易造成射出件形狀改變與尺寸變形。澆口的流動方向與製品軸向垂直時會有結合線與短射的問題。澆口截面積太小，易產生表面霧化的現象。從CAE分析與實際射出成型作比較，兩者的結果是互相吻合的，利用CAE分析優化流道設計可以改善流動平衡的問題。

關鍵字

澆口位置；結合線；短射；表面霧化

並列摘要

Most of plastic parts designed to complex and changeable shape. Thus the mold design is very important for the part quality. In this study, a cylindrical, hollow, and three steps of plastic parts including different thickness was investigated. A six-cavity of mold was designed to discuss the flow balance. In addition, the gate position and gate size also affect the dimensions and appearance of plastic parts. Results show the gate was designed at the thinner location; it will cause the shape and dimension deformation. If the flow direction at the gate is perpendicular to shaft line, it will bring about the welding lines and short shot. If the cross section of the gate is too small, the surface haze will formed on the surface of part. Comparing the results of CAE analysis and injection molding parts, it consistent with each other. CAE analysis can be used to optimize the runner design for improving the issue of flow balance.

並列關鍵字

gate position ； welding lines ； short shot ； surface haze

參考文獻

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[2] http://zh.wikipedia.org/zh-hk/%E8%B3%BD%E7%92%90%E7%8F%9E

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