- 學位論文
結合CAE之知識化熱流道設計引導系統的研究與開發
The Research and Development of Knowledge-Based Navigating System for Hot-Runner Design Integrated with CAE Analysis
摘要
摘要 由於塑膠材料的成長，配合量產與產品輕量化的需求，塑料製品從日常生活產品中，急速應用於精密工業產品，尤其是3C 產業的產品，更是廣泛使用塑料的製品，所以對產品精密度的要求，尺寸安定性，成型週期（Molding Cycle）的快速性，越來越重視。且近年來國際石油價格的急遽波動，塑料的來源及價格的不穩定，造成塑料昂貴，製品成本無法降低。然而目前使用最廣泛的塑料製品成型方法為射出成型，而其中傳統冷澆道射出成型模具仍佔大多數。傳統冷澆道式之射出成型，需要有較長的澆道冷卻時間、澆道的塑料損失、及廢料處理，無形中降低成型的效率，也增加成本。目前各國環保規格日益嚴格，廢料回收也增加不少額外成本。 最近幾年熱流道成型方式的使用發展快速，也日益普及。所謂熱流道成型模具是指在澆道的部位，利用加熱或保溫的方式，使澆道內的塑料常保熔融狀態，以供下一次射出成型使用。因此如何合理、迅速與優化地規劃並設計出熱流道系統以及正確的算出熱流板所需要的加熱量正是本研究的重點，本研究在Web-based的架構下，利用CAD軟體 Pro/ENGINEER視窗下的瀏覽器開發出熱流道設計引導系統，經由清楚規劃之流程，一步一步引導使用者，有效率設計出一套熱流道系統；並且使用資料庫儲存歷史設計資訊，在往後設計時可提供參考，並降低3D熱流道模型設計與繪製時間；再將其熱流板用CAE軟體ANSYS做熱傳導的分析，得到正確的加熱量有助於加熱系規劃及加熱器規格之制訂，更可省去重複試模所花費的時間與金錢。
並列摘要
Abstract Due to the growth of plastic materials, along with the prerequisite of large quantity and light weight, plastic products used in daily life are now rapidly being applied in precision engineer products. Especially, 3C (Computer, Communication, Consumer Electronics) products extensively use plastic goods, therefore the demanding in the precision of products, the stability of dimensions and efficiency of molding cycles has become more and more crucial . However, the unsettlement and the instability of plastics’ origin and price in the recent years trigger plastic products to become more expensive. Nevertheless, the most widely used manufacturing process of plastic product is injection molding, in which the traditional cold runner still stands in great majority. The traditional cold runner requires longer cooling time and waste transferring plastics, imperceptibly lowering molding efficiency and increasing cost. Moreover, the environment standard of each country has become increasingly strict, and extra cost has also been added to waste materials recycling. In the recent years, the usage of hot runner is rapidly developing, and also becoming more universal day by day. The so-called hot runner refers to heating and keeping warm the runner system, allowing the plastic inside runners to stay in melting condition so that it can be used in the next molding cycle. Therefore, how to effectively plan and design hot runner system and to accurately calculate the heating power has become the main focus of this research. First, the navigating system in CAD software is developed to construct precise 3D models which is then taken to CAE software (ANSYS) for proceeding heat transfer analysis. The accurate heating power from CAE analysis is quite helpful in planning the heating system and choosing the heating devices. This will certainly save time and money.