塑膠射出薄殼件加強肋之最佳化設計

本研究的目的是探討塑膠薄殼件在承受集中負載時之最佳化加強肋的設計，研究的程序包括以下：第一，三維模型之塑膠薄殼的建立是基於型模設計基準與塑模設計經驗。第二，商業有限元素分析軟體是用來模擬塑膠薄殼件根據所擬議的集中負載。第三，田口方法的實驗設計過程中應用到評估的貢獻，每個選定的設計參數基於目標函數，也就是塑膠薄殼件的最小變形量。初步結果得到從本案例研究表示出，首要五個的重要參數，影響剛度結構的八個參數選定此項研究的是肋的高度（22.62％），成品厚度（18.72％），肋的配置（18.66％），肋的數目（15.76％），和側壁加強（10.07％）。因此，增加肋的高度可能似乎是一種有效的方法，以改善塑膠薄殼強度來抵制變形。

關鍵字

肋的設計；塑膠射出件；有限元素法；田口方法

並列摘要

The purpose of this study is to investigate the optimum reinforced ribs design of the plastic injection thin shell pieces subjected to concentrated loading, The research procedures include the following: first, 3D model of the plastic shell is created based on plastic mold reference design benchmarks and industrial oriented design experience. Second, the commercial finite element analysis software is used to simulate the thin shell plastic parts under proposed concentrated load. Third, the Taguchi method of experimental design process is applied to evaluate the contributions of each selected design parameters based on the objective function, that is, minimum deformation of the thin shell parts. Preliminary results obtained from this case study show that the first five important parameters that affecting the stiffness of the structure of eight parameters selected for this study are rib height (22.62%), finished product thickness (18.72%), rib configuration (18.66%), number of ribs (15.76%), and the sidewall reinforcement (10.07%). Therefore, increasing the height of ribs if possible seems to be an effective way to improve the strength of plastic shell to resist deformation.

並列關鍵字

Rib design ； Plastic injection part ； Finite element method ； Taguchi method

參考文獻

[6] 陳翰生，結合有限元素法和田口法應用於塑膠射出成品補強肋設計之研究，碩士論文，大同大學機械工程研究所，台北，2004。

[7] Tuncay Erzurumlu、Babur Ozcelik，Minimization of warpage and sink index in injection-molded thermoplastic parts using Taguchi optimization method，Turkey：Design and Manufacturing Engineering，Gebze Institute of Technology，2005。

[10] Joseph Edward Shigley、 Charles R. Mischke、 Richard G. Budynas，Mechanical engineering design，USA：McGraw Hill，2004。

參考文獻