臺灣博碩士論文加值系統

氣體輔助射出成形技術，適合厚薄比大的產品，氣體穿透塑料使成品內部成中空狀態，能有效降低成本及節省材料，同時亦能撐開產品表面凹陷，並降低體積收縮率。本研究應用在減重和降低體積收縮且有良好的效果，並加入田口實驗法，針對製程缺點找出最佳化因子參數組合，再利用CAE 進行實驗分析，以模流分析軟體(Moldex 3D)預測塑料流動，以及氣體的動態充填情形、因子參數組合與機台參數等結果。

Gas assisted injection molding was suitable to design the product that has a relatively large difference in thickness. Filling the gas in plastic materials during processing, can make the plastic hollow and form the desired shape, then cost down and reduce material effectively. This study reveals that Moldex 3D is the good CAE software to analyze and make product more lightly as well as to decrease volume shrinkage rate. In addition, the Taguchi method was used to evaluate the volume shrinkage problem in order to maximize the process parameters. The results indicate that plastic material, dynamic filling of gas, gate, reducing cycle time of production and
operation parameters of machine are the main factors affecting the volume shrinkage rate.

中文摘要.....................................I
英文摘要.....................................II
表目錄......................................III
圖目錄......................................VIII
符號說明.....................................IX
第一章、緒論..................................1
1-1 前言.....................................1
1-2 文獻回顧..................................2
1-3 研究動機與目的.............................4
1-4 論文架構..................................5
第二章、氣體輔助射出成形.........................6
2-1 射出成形製程..............................6
2-2 射出成形理論..............................7
2-3 氣體輔助射出成形技術........................10
2-3-1 完全射出法..............................11
2-3-2 短射出法..................... ..........11
2-4 氣體輔助射出成形流程........ .... .... .... 11
2-5 氣體輔助射出成形技術優勢.....................12
2-6 射出設備..................................13
第三章、模型建構、實驗與分析......................18
3-1 研究目的..................................18
3-2 模流分析流程...............................20
3-2-1 模型圖繪製...............................20
3-2-2 表面網格................................23
3-2-3 實體網格................................21
3-2-4 材料選取................................22
3-2-5 成形條件參數控制..........................22
3-2-6 分析結果. . . . . . . . . . . . . . . . 22
3-3 分析模型說明...............................23
3-3-1 分析產品................................23
3-3-2 充填分析................................29
3-3-3 體積收縮率分析...........................29
3-4 氣體輔助射出成形模組........................30
3-4-1 充填分析結果.............................30
3-4-2 體積收縮率分析結果........................31
第四章、氣體輔助射出成形製程優化...................32
4-1 引言......................................32
4-2 田口方法...................................32
4-2-1 信號雜訊比(S/N)...........................33
4-2-2 變異數分析................................35
4-2-3 田口實驗規劃流程...........................36
4-3 應用田口實驗設計法進行製程優化..................37
4-3-1 品質特性的選定.............................37
4-3-2 影響品質特性因子...........................37
4-3-3 體積收縮控制因子與水準配置...................37
4-3-4 充填分析結果..............................39
4-3-5 體積收縮率分析結果.........................45
第五章、結果與討論...............................46
5-1 體積收縮率分析探討...........................46
5-2 充填分析探討................................49
5-3 氣體行為分析................................54
第六章、結論....................................55
未來研究方向....................................56
參考文獻.......................................57

[1] 林垂德，“加肋平板件氣體輔助射出成型之二次滲透研究”國立臺灣大學，碩士論文(2000)。
[2] 許庭豪，“以田口實驗方法探討氣體輔助射出成型參數對塑件之翹曲量研究”逢甲大學，碩士論文(2012)。
[3] 蘇建嘉，“外部氣體輔助射出成型對補強肋的表面品質之研究” 中原大學，碩士論文(2007)。
[4] 吳伯勳，“運用氣體輔助射出成型於65 吋電漿電視前殼之研究”中原大學，碩士論文(2007)。
[5] 莊英杰，“氣體輔助射出成型中氣體穿透現象之數值模擬分析研究” 中原大學，碩士論文(2007)。
[6] 王家強，“氣體輔助射出成型之高壓氣體控制” 國立臺北科技大學，碩士論文(2003)。
[7] 林意絢，“氣體輔助射出成型件表面光澤差現象之成因與對策” 長庚大學，碩士論文(2000)。
[8] B. Ozcelik, T. Erzurumlu, ―Comparison of the warpage optimization in the plastic injection molding using ANOVA, neural network model and genetic algorithm‖,Journal of Materials Processing Technology 171 pp. 437-445 (2006).
[9] HasanOktem, TuncayErzurumlu, Ibrahim Uzman,―Application of Taguchi optimization technique in determining plastic injection molding process parameter for a thin-shell part‖, Materials and design 28 pp. 1271-1278 (2007).
[10] Z. Zhenyu, H. Xushu, ―Injection Mold Design and Optimization of Automotive panel‖, IEEE-Standards Association 214 pp. 119-122(2010).
[11] H. Guijian, L. Xuemei, W. Xiaoyu, L. Jibin, ―Optimized Design of Injection Mould for Mobile Phone Front ShellBased on CAE Technology‖, IEEE-Standards Association 218 pp. 648-650 (2009).
[12] X. Huiyu, L. Chongjie, Z. Weizhi, ―Knowledge and Simulation Based Mold Virtual Design for Long-armed Product‖, IEEE-Standards Association (2010).
[13] A.M. Saman, A.H. Abdullah and M.A. MohdNor, ―Computer Simulation Opportunity in Plastic Injection Mold Development for Automotive Part‖,IEEE-Standards Association 197 pp. 495-498 (2009).
[14] Z. Jian, W. Chuanyang, ―Flow analysis in Injection Molding Process Based onMoldFlow‖, IEEE-Standards Association (2010).
[15] Tuncay Erzurumlu, Babur Ozcelik, ―Minimization of warpage and sink index in injection-molded thermoplastic parts using Taguchi optimizationmethod‖,Materials and Design 27 pp. 853-561 (2006).
[16] 洪瑞庭，“塑膠加工技術與工程”，高立圖書有限公司，89 年。
[17] 吳俊煌，“塑膠射出成形模具設計”，復文，台南市，(1995)。
[18] 吳復強，“田口品質工程(Quailty Engineering)”，全威圖書有限公司。
[19] Box G. E. P, Hunter W. G, Hunter J. S,―Statistics for Experimenters‖, John Wiley &sons, (1978)
[20] Peace G. S, ―Taguchi Method, A Hand-On Approach‖, Addison Wesley, (1993)
[21] Ross P. J, ―Taguchi Techniques for Quality Engineering‖, Second Edition,McGraw-Hill, (1996)
[22] 李輝煌，“田口方法品質設計的與實務”，高立出版社，台北，(2005)。
[23] 陳耀茂，“實驗計畫與解析法”，高立出版社，台北，(2001)。
[24] 科盛科技，“CAE 模流分析技術入門與應用”，初版，全華出版社，台北市，(2002)。
[25] 李佳諺，“筆記型電腦底蓋之模流分析”，碩士論文，機械工程系所，南台科技大學，台南，(2008)。
[26] 田口玄一，“田口工程案例集(日本篇)”，中國生產力公司。
[27] 黃運火亞太模具科技股份有限公司，〈氣體輔助射出成型技術概述（一）、（二）〉，1998
[28] 蔡銘宏，“電腦輔助工程分析在氣體輔助射出成型製程上之應用”（新竹：國立清華大學化學工程研究所，碩士論文，1997）
[29] 黃運火/愛富明科技蔡銘宏，康立業/科盛科技，〈應用CAE 模流分析技術在大型塑件氣輔射出成型之模具設計〉（2005 年7 月）
[30] 林鈺婉，“三維電腦輔助工程於氣體輔助射出成型氣體穿透特性之研究”（中原大學機械工程研究所，碩士論文，2003）
[31] Isayev, Injection and Compression Molding Fundamentals, Marcel Dekker Inc.,New York, 1989.
[32] H. H. Chiang, ―Simulation and Verification of Filling and Post-filling Stages of the Injection-Molding Process‖, CIMP Tech. Report, No.62, Cornell Uni., Ithaca,1989.
[33] N. T. Cheng, ―A Study of the Polymer Melt Compressible Flow and Pressure Development in the Post-filling Stage of Injection Molding Process‖, Master Thesis, Chung Yuan University, Taiwan, June, 1991.
[34] L. S. Turng, ―Computer-aided Engineering for the Gas-assisted Injection Molding Process‖, SPE Tech. Papers, 38, 452-456 , 1992.
[35] Lanvers, and W. Michaeli, ―CAE for Coinjection and Gas-assisted Injection Molding‖, SPE Tech. Papers, 38, 1796-1799 , 1992.
[36] G. Sherbelis, ―Filling and Packing CAE Software for Gas Injection Molding‖, SPE Tech, Papers, 40,411-416, 1994
[37] R. Liang, Gas-assisted injection molding—a new technology with innovation and challenge, J. Macromolecule 4 (1996)226–233.
[38] X. Lu, H.H. Chiang, L. Gong, J. Zhao, Study of gas fingering behavior in 60 gas-assisted injection molding, Polym. Eng. Sci. 36(1) (1999) 62–77.
[39] J. Liang, Y. Li, X. Li, P. Fu, Formation and resolving method of detained score defect about gas—assisted injection product, J.Jilin University 32 (1)(2002) 83–86 (Engineering and Technology Edition).
[40] Z. Zhu, The Technology of Super Critical Liquid—Principle and Application,Chemistry Industry Press, Beijing, 2000, p. 3.
[41] H. Ma, The Extraction of Biologic Resource Through Super Critical Liquid, Anhui Science & Technology Publishing House, Hefei, 2000,p. 1.
[42] R. Feng, et al., The Metal Physics, vol. I, Science Education Press, Beijing,1990.
[43] M.-U. Tyn, Translation by Yuanzhong Xu. The Differential Equation in Mathematics and Physics, Shanghai Scientific and Technical Publishers, Shanghai,1983.
[44] J. Sun, et al., The Equation and Special Function in Mathematics and Physics,Higher Education Press, Beijing, 2001, p. 8.
[45] J. Crank, The Mathematics of Diffusion, Clarendon Press,Oxford, 1975.