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研究生： 蔡文偉
Wen-Wei Tsai
論文名稱： PBT/GF射出成型製程最佳化及挫屈特性研究
指導教授： 黃俊仁
Jiun-ren Hwang
陳俊生
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
畢業學年度： 90
語文別： 中文
論文頁數： 108
中文關鍵詞： 射出成型 、殘留應力 、翹曲 、挫屈力 、最佳化
外文關鍵詞： Buckling, Warpage, Residual Stress, Injection, Optimum
相關次數： 點閱：18  下載：0 
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    • 本研究建立C-MOLD軟體與ABAQUS軟體間之整合介面程式，使射出成型模流分析與有限元素結構分析能一氣呵成。本研究以不同短玻璃纖維含量的聚丁烯對苯二甲酸酯（PBT/GF）複合材料為研究對象，應用田口實驗計畫法搭配C-MOLD軟體與ABAQUS軟體，有系統的探討射出成型條件對翹曲變形及挫屈力的影響，進而求得最小翹曲量及最大挫屈力的最佳射出成型製程參數。最後，探討因射出成型過程而產生不均勻材料性質、殘留應力分佈與溫度分佈之試片，其影響挫屈力的各種因素與挫屈力之間的關係。
    研究結果顯示PBT/15 %GF於充填時間3秒、射速100 %、融膠溫度240℃與模具溫度80℃時具有最小的翹曲量；PBT/30 %GF於充填時間3秒、射速60 %、融膠溫度240℃與模具溫度95℃時具有最小的翹曲量，相對於成型條件範圍的中位數參數組合，其翹曲量改善分別為32.8 %及23.7 %。PBT/15 %GF與PBT/30 %GF材料相同於成型條件為充填時間3秒、射速20 %、融膠溫度240℃與模具溫度80℃時有最大的挫屈力，且第一主方向楊氏模數對挫屈力的影響最大，兩者成正比關係，其相關係數高達0.99以上。

    略

    摘要 I 誌謝 II 總目錄 III 表目錄 V 圖目錄 VI 符號說明 VII 第一章 前言 1 1-1 研究動機 1 1-2 研究目的 3 1-3 文獻回顧 3 第二章 理論概述 9 2-1 射出成型充填及保壓過程 9 2-2 射出成型冷卻過程 13 2-3 射出成型過程之殘留應力 15 2-4 挫屈力理論概述 17 2-5 田口實驗計畫法 17 2-5-1 品質損失函數 18 2-5-2 直交表 20 2-5-3 信號雜訊比 21 第三章 模流、翹曲與挫屈分析步驟 24 3-1 實驗材料 24 3-2 試片規格與模具設計 25 3-3 成型條件 25 3-4 模流分析 26 3-5 資料轉換 27 3-6 翹曲與挫屈力分析 29 第四章 結果與討論 31 4-1 分析模式驗證 31 4-1-1 元數數量選取 31 4-1-2 殘留應力驗證 31 4-2 翹曲量分析結果 32 4-3 挫屈力分析結果 35 4-4 最佳製程預估與驗證 36 4-4-1 最佳製程預估 37 4-4-2 最佳製程驗證 38 4-5 變異數分析 40 4-6 挫屈力探討 43 4-6-1 翹曲量與挫屈力的關係 44 4-6-2 第一主方向楊氏模數與挫屈力的關係 44 4-6-3 軸向收縮與挫屈力的關係 45 4-6-4 橫向收縮與挫屈力的關係 45 第五章 結論與未來發展方向 46 5-1 結論 46 5-2 未來發展方向 47 參考文獻 48

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