微結構模具快速變溫技術之研究

Study of Rapidly Temperature Control on Micro-Feature Mold

秦進傳(Jin-Chuan Cin)

指導教授 ： 陳夏宗 ； 黃健生

中原大學/工學院/機械工程研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500480

摘要

隨著產品的特殊功能應用及微機電技術的興起，射出成型的技術層次也漸漸藉由微機電技術及超精密加工技術向上提升到微特徵、微尺寸成型技術。為了達到精密成型的要求，在射出成型製程中，必須藉由升高模具溫度，使塑料在充填階段有更好的流動性，因此，較長的成型週期將無法避免。快速變溫技術可以控制成型過程中，在充填保壓階段維持高模溫，待冷卻階段導入冷卻水快速降低模具溫度，則可減少成型週期且改善成品品質。
本研究是利用模溫控制機與感應加熱對微結構模具進行加熱與冷卻實驗效率比較，並以分析軟體ANSYS作3D微結構模具溫度場分析與驗證，以驗證分析之可行性。然後將此變溫技術實際運用於微射出成型製程中，探討其對於提升微結構轉寫性之效益。最後，藉由ANSYS軟體來探討不同參數變化對於微結構模具加熱之影響。
研究結果顯示，使用模溫控制機將模具從60℃加熱至100℃需要616秒，而感應加熱僅需2.5秒。在冷卻方面，使用模溫控制機將模具從100℃冷卻至60℃需要436秒，而感應加熱則只需77秒，顯示感應加熱在加熱及冷卻效率上之優勢。ANSYS應用於3D微結構模具溫度場模擬分析與實驗結果之趨勢相當接近，成功建立非平面式感應加熱3D磁-熱耦合模擬分析技術。從分析結果來看，感應加熱運用在微結構模具加熱上，對於微結構內部有局部加熱之影響，對於微結構模具加熱有加分的效果。在實際案例實驗與分析中，成功的將此快速變溫技術運用在微射出成型實驗上，並證明其可行性，且可以有效提升微結構轉寫性。

關鍵字

感應加熱 ； 變溫技術 ； 微結構射出成型 ； 磁-熱耦合分析

並列摘要

The micro-part molded by micro/micro-feature injection molding becomes more and more popular in MEMS (Micro-Electro-Mechanical System) application. High mold temperature provided-contributions to conventional and advanced injection molded parts, molded design, high temperature also increases cooling time of injection cycle. The rapidly temperature control system can provide a mold temperature condition, is to have a hot mold during the filling stage, and a cold mold during the cooling stage thereby improving quality of molded part without increasing cycle time.
In this study, we build a rapidly temperature control system using different heating method include traditional mold temperature controller and induction heating. We also processed mold temperature field analysis with heating and cooling apparatus by ANSYS software.
As a result, the mold surface temperature increases from 60℃ to 100℃. It takes 616 seconds for traditional mold temperature controller, and 2.5 seconds for induction heating. The mold surface temperature decreases from 100 ℃ to 60 ℃. It takes 436 seconds for traditional mold temperature controller, and 77 seconds for induction heating. The result show that the rapidly temperature control system using induction heating was successfully illustrated. ANSYS software can successful establish mold temperature field analysis and set up 3D non-flat magnetic-thermal coupled analysis. According to analysis result, the induction heating makes the heating of micro-feature mold more effectively. We successful apply this technology in micro-feature injection molding. The rapidly temperature control can improve the duplication of micro-part molded effectively.

並列關鍵字

Micro -feature injection molding ； Rapidly temperature control ； Magnetic-thermal coupled analysis ； Induction heating

參考文獻

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