塑膠射出成型製品收縮翹曲變形CAE 分析

The CAE Warpage Analysis of Plastic Injection Molding Parts

楊文彬(Wen-Pin Yang)

指導教授 ： 韓麗龍

國立臺北科技大學/機電學院/製造科技研究所/碩士(2010年)

摘要

應用CAE 模流分析模擬塑膠射出成型過程，能夠提供模具開發時優化流道與
澆口的設計，減少試模的次數，縮短模具開發時程及降低製作成本。本研究使用
Autodesk Mold Flow 軟體，模擬分析塑膠相框上蓋在射出成型時對總翹曲(total
warpage)的影響。模具的澆口數目分為單一進料點與兩支進料點兩種，試驗的塑膠
料有ABS, ABS+PC, PC 三種，並在三種不同的保壓壓力(packing pressure)大小作總
收縮翹曲變化量的交叉比較分析。
結果顯示ABS、ABS+PC、PC+三種材料在單一進料點且不同保壓壓力時， 「相
框上蓋」之總收縮翹曲變化量，以ABS 的總翹曲量最小，PC 的總翹曲量最大。在
兩支進料點且不同保壓壓力時之總收縮翹曲變化量，可以發現ABS 的總翹曲量最
小， ABS+ PC 的總翹曲量最大。塑膠射出成型「相框上蓋」過程中，兩支進料點
雖然可以降低射出壓力，但對於總翹曲量的改善並不明顯，在節省流道材料，採
用單一進料點。

關鍵字

CAE 模流分析 ； 塑膠射出成型 ； 總翹曲 ； 保壓壓力射壓極大值

並列摘要

Using CAE mold flow analysis software to simulate the plastic injection molding
process can optimize the runner and gate design of the mold, reduce the test molding
times, shorten the mold design hour through, and cost down of the mold making. In this
study, Autodesk Mold Flow software will be used to simulate and analyze the total
warpage of photo-frame above cover during injection molding. The gate number
designed including single gate and double gate in the mold. Three types of plastic
materials were used including ABS, ABS+PC, and PC. Finally, total warpage was
compared at the three different packing pressures.
Results show the minimum total warpage of the single gate is ABS among the three
plastic materials, maximum is PC. For the double gate, the minimum total warpage is
also ABS material, , maximum is ABS+PC. The advantage of double gate is that can
reduce the injection pressure. However, it is not obviously to improving the total
warpage. For this reason, the single gate was suggested in this study to safe the plastic
material used.

並列關鍵字

CAE mold flow analysis ； plastic injection molding ； total warpage ； packing

參考文獻

[1] M S.Jacques, “An analysis of thermal warpage in injection molded flat parts

[2] 黃東鴻，薄殼射出件翹曲變形與殘留應力之研究，碩士論文，成功大學

[4] W. B. Young, “Effect of process parameters on injection compression

[6] I. Babbar and G. N. Mathur, "Rheological Properties of Blends of

Polycarbonate with Poly(acrylonitrile butadiene styrene)," Polymer,Vol.35,