整合Moldflow與微分演算法於射出成型模具進澆口位置最佳化

Gate Location Optimization of Injection Molding Using Integration of Moldflow and Differential Evolution Algorithm

曾義哲(Yi-Che Tseng)

指導教授 ： 吳俊瑩

大同大學/工程學院/機械工程學系所/碩士(2012年)

摘要

摘 要
通常經由射出成型生產的塑膠產品，如果射出條件控制不當，射出成型產品就會出現翹曲或熔接線等缺陷，而影響產品的品質。射出成型模具的進澆口位置，對於射出成型產品的品質好壞扮演相當重要角色。一般常常是依賴設計者的經驗使用試誤法來進行設計進澆口位置，經過多次的測試才能找出符合需求的設計，但是對於複雜形狀的產品無法保證可以解決。本研究運用微分演算法(DE)做為全域性的搜尋工具，先以數個測試方程式驗證微分演算法程式架構的執行效能與正確性，並整合模流分析軟體Moldflow，在符合熔接線長度與翹曲量的設計要求下，搜尋模型最佳的進澆口位置。從設計案例的執行結果，證明本研究在射出成型模具的進澆口位置設計，可以有效提供設計者多種不同的進澆口位置選擇，除了可以減少熔接線生成外，也同時降低翹曲量。進而提升產品的品質，降低成本，並提升市場競爭力。

關鍵字

進澆口位置最佳化 ； 翹曲 ； 熔接線

並列摘要

Abstract
The gate location for injection molding plays an important role for quality of plastic product. It often depends on the designer’s experiences using the process of trial-and-error for gate location design. Even through the designer could find out the design fitting the requirements through several trials, but it still cannot guarantee that the results are good enough specially for complicated shape or high precision product.
In recently years, the computer-aided engineering (CAE) contributes for enhancing design ability for development of high precision and complicated products. The products manufactured using injection molding may create some defects such as warpage or welding line which was influenced to the quality of products.
The main purpose of this study is using differential evolution algorithm as global searching tool for optimization of gate location. In order to verify the architecture and performance of optimization program using differential evolution algorithm, several test functions are utilized to check execution efficiency and the accuracy of developed program first. Then the developed DE program was integrated with moldflow software for searching the best gate location that minimizes the warpage with constraint of the arrangement of weld line.
From the result of case study, it was shown that the integration of DE with moldflow implemented in this study could offer designer with different options in selection the best arrangement of gate locations of injection molding with constraints of weld lines prevention and warpage reduction. The developed architecture can enhance the performance of gate location design, improvement of product quality, reduction of development cost and enhancement of market competition.

並列關鍵字

gate location optimization ； warpage ； weld line

參考文獻

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