高分子發泡材料在射出機模穴內熟化程度之預估

The prediction of ripening behavior of EVA material in injection molding machine

謝昌樺(CHANG-HUA HSIEH)

指導教授 ： 劉德騏

國立中正大學/工學院/機械工程學系/碩士(2016年)

摘要

在本研究中，了解到發泡材料EVA (Ethylene Vinyl Acetate)的熟化程度影響成品特性甚大，又因為發泡材料特性十分複雜，因此先針對EVA材料建構出材料熱特性實驗方法，再藉由模擬軟體Abaqus分析EVA材料在模穴內之熟化程度，改善實際製程中所遇到之問題。
為了瞭解EVA材料之特性，先應用TMA與TGA量測EVA材料之玻璃轉化溫度與發泡溫度，在針對此二個特殊點做熱傳導係數實驗之規劃，並將結果代入已經由紅外線熱像儀及熱電偶溫度感測器做熱傳分析驗證之射出機合模系統中，給予模擬製程之邊界條件，以Abaqus預估EVA材料在加硫時間內熟化程度之表現，同時建立一套從發泡材料特性實驗至材料熟化程度分析之手法，協助改善實際製程上所遇到之問題。

關鍵字

高分子材料熱傳導係數 ； 射出機合模系統 ； 發泡材料 ； 有限元素法 ； 熱分析

並列摘要

In this research, we notice that how much complex the EVA is when it deals with heat problem. In order to make a further step, first of all, we use Thermomechanical Analyzer to obtain the Glass transition temperature of EVA and Thermogravimetric Analyzer for its foaming temperature. Secondary, establish a standard of measuring the thermal conductivity of EVA on the specific temperature. Lastly, insert the measuring results and proper boundary condition into verified clamping system in Abaqus to predict the ripening of EVA.
The ripening of EVA affects its mechanical property considerably higher than any other fact in product behavior. By the method established in this study, we are able to improve the problem in real manufacturing.

並列關鍵字

Thermal conductivity of macromolecular material ； Clamping system of injection molding machine ； EVA ； Finite element method ； Thermal analysis

參考文獻

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