Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2416
標題: 多材質射出成型翹曲量模流分析
Mold-Flow Analysis of Warpage for Multi-Component Injection Molding
作者: 謝東昇
Hsieh, Tung-Sheng
關鍵字: Multi-Component Injection Molding
多材質射出成型
Taguchi Method
Warpage
田口法
翹曲變形
出版社: 機械工程學系所
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摘要: 由於消費市場對產品機能性、外觀多變化等要求,近年來多色產品快速崛起於塑膠射出成型產品的市場上,其需求有增無減,因此有關多材質射出成型技術亦成為重要發展方向。射出成型產品優劣考量主要因素之一為尺寸精密度,而此要求與射出產品翹曲變形量大小息息相關,故本研究以射出產品翹曲變形量作為探討的重點。 本文以雙色射出成型製程技術應用於不同塑膠材料的結合,使用結晶塑料PP與彈性體TPE結合,以及非結晶塑料PS與彈性體TPE結合來進行分析,研究中使用電腦輔助工程軟體Moldex進行射出成品之模擬分析。整體研究分為兩方面進行。 一是使用田口法對不同模具設計的可控制因子進行分析,找出塑件能達到最小翹曲變形量之模具設計。分析結果顯示,第一射塑件最佳參數組合之模具設計的翹曲量,可改善高達91.8%的平均翹曲變形量,而第二射塑件最佳參數組合之模具設計的翹曲量,可改善高達40%的平均翹曲變形量。 再來使用田口法對不同射出製程參數的可控制因子分析,找出塑件能達到最小翹曲變形量之成型參數。分析結果顯示,調大保壓壓力、調高熔膠溫度與模具溫度、以及調長保壓時間,能有助塑件達到最小翹曲變形量,且其均為效應較大的因子參數。
Recent years, multi-color injection molding products are increasing quickly because of requirements from consumer market for product's functionality and appearance. Consequently, the multi-component injection molding technology becomes an important research direction. One of the critical factors for deciding the quality of injection molding product is the dimensional precision requirement. Since the amount of warpage will affect the dimensional precision requirement. Therefore, this research is focus on the discussion of warpage of multi-component injection molding. The process studied in this research is to combine different plastic material by two-shot injection molding technology. One example is to combine crystallization plastic PP and elastomer TPE, and the other one is to combine amorphic substance plastic PS and the elastomer TPE. The analysis is done by using computer-aided engineering software Moldex. This study is divided into two directions. The first direction is using Taguchi method to analyze the control factors of mold designing parameters to find out the optimal parameters for the minimum amount of warpage. The result shows that the improvement can reach 91.8% for optimal combination of parameters of the first shot compared to the average amount of warpage. The optimal combination of parameters for the second shot also can improve the amount of warpage to 40% compared to the average amount of warpage. The second direction is again using Taguchi method to analyze the control factors of process parameters to find out the optimal parameters for the minimum amount of warpage. Result shows that increasing packing pressure, melt temperature, mold temperature and packing time are helpful for reducing amount of warpage.
URI: http://hdl.handle.net/11455/2416
其他識別: U0005-0705201012415600
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0705201012415600
Appears in Collections:機械工程學系所

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