Simulation of the Injection-Compression Molding Process Using CV/FEM Technique

利用控制體積／有限元素技術模擬射出壓縮成型之製程

陳永徵(Yung Chung Chen) ； 陳夏宗(Shia Chung Chen) ； 章明(Ming Chang) ； 何淳雪(Chewn Shell Ho)

《中原學報》 24卷1期 (1996/01) Pp. 37-45

https://doi.org/10.6358/JCYU.199601.0037

摘要

本研究係基於Hele-Shaw流動模式配合控制體積／有限元素方法來模擬射出壓縮成型之製程，並預測熔膠波前的運動以及成型壓力、溫度及流速的分佈。研究中發現壓縮的速度是影響成型壓力最重要的因素，在適當的壓縮速度下，成型壓力比傳統射出成型為低，因而殘留應力可以隨之降低。同時研究也發現利用射出壓縮成型成品在充填完成之後的溫度分佈也較為均勻。若射出轉移或壓出成型的時間太短，成型壓力也相對變高。

關鍵字

射出壓縮成型 ； 控制體積 ； 有限元素法 ； 壓縮速度 ； 數值模擬

並列摘要

In the present study, a numerical alogrithm is developed in order to simulate the non-isothermal filling and compression stages of the injection-compression molding process. The generialized Hele-Shaw flow model combined with the control volume/finite element method is implemented to predict the melt front advancement and the distributions of pressure, temperature and flow velocity dynamically during the molding process. From on the simulated results, it was found that the compression speed is the most important factor that affect the molding pressure. Under proper compression speed, the predicted molding pressure is lower than that required by the purely conventional injection molding and the part residual stress can be minimized. It was also found that part temperature is more uniform at the end of filling process by using injection-compression molding. If the switch time from injection to compression is too low, it may also cause high molding pressure.

並列關鍵字

Injection-Compression Molding ； Control Volume ； Finite Element Method ； Simulation ； Compression Speed