外周包覆式磁場感應加熱應用於模具 快速加熱之研究

Study on Externally Warped Coils Induction Heating and it's Application on Rapid Mold Surface Heating

沈文揚(Wen-Yang Shen)

指導教授 ： 陳夏宗

中原大學/工學院/機械工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000679

摘要

本研究建置利用外周包覆式磁場感應加熱，來探討其實際運用在模具表面加熱上之優缺點。第一階段進行串聯式與並聯式線圈加熱效益與測試，第二階段選出較佳線圈型式進行公母模溫度均勻性之探討
，第三階段改變不同參數設計對模面加熱效益與溫度歷程測試結果。而最後藉由ANSYS®分析軟體與實驗結果進行比對驗證。
研究結果顯示，串聯式加熱效率約8.26oC/s，並聯式加熱效率約1.88oC/s，兩者加熱效率探討，串聯式線圈比並聯式好。而公母模面溫度均勻性，母模面溫度T1位置約8.13oC/s、T2位置約8.97oC/s、T3位置約10.16oC/s，公模面溫度T1位置約7.83oC/s、T2位置約8.95oC/s、T3位置約9.94oC/s，兩者溫度分佈均勻對稱。在不同線圈匝數下，七匝加熱效率約10.58oC/s、6匝約8.26oC/s、5匝約4.9oC/s
，故加熱效率七匝比六匝、五匝好。不同公母模面間距下，對於模面加熱效率與均勻性並不會有太大影響。不同線圈間距下，18mm加熱效率約9.81oC/s、20mm約8.26oC/s及22mm約7.04oC/s，在加熱效率之探討，線圈間距18mm比20mm、22mm加熱效率好。
由實驗結果得知，不同線圈匝數及不同線圈間距會影響模面加熱效率，而公母模面間距對加熱效率沒有太大之影響。從ANSYS®分析軟體，來進行模面溫度場模擬分析，其模擬分析與實驗結果趨勢相同
，故成功建立外周包覆式磁場感應加熱模擬分析技術，此技術之運用在模塊加熱上，對於模具表面溫度場有很好加熱效果。

關鍵字

磁熱耦合分析 ； 外周包覆式感應加熱 ； 動態模溫控制技術

並列摘要

The purpose of this study is to use Externally Warped Coils Induction Heating to determine the practicality of its application on mold surface heating. The first step is a test of heating efficiency using parallel and series type coils. The second step is the selection of the better coil type for mold temperature homogeniety. The third step is testing different mold designs and observing their effect on heating efficiency. Finally, we compare and analyze the experimental results with ANSYS® analysis software.
Experimental results show the heating efficiency of series type coils is 8.26oC/s and the efficiency of parallel type is 1.88oC/s. The series type heats more rapidly and is, thus, a better system for heating the mold. Monitoring the surface temperature homogeniety between the mold cavity and core, we find the cavity surface temperature at positions T1, T2, and T3 heated at a rate of 8.13oC/s, 8.97oC/s, and 10.16oC/s respectively. The core surface temperatures at the same positions T1, T2, and T3 rose at rates of 7.83oC/s, 8.95oC/s, and 9.94oC/s respectively. The temperatures at these three points show homogeniety and symmetry. For different coil systems, their heating efficiency is directly related to the number of coils. The five, six, and seven coil systems have a heating efficiency of 4.9oC/s, 8.26oC/s, and 10.58oC/s respectively. Thus, the seven coil system is more advantageous than the others. Different spacing between the mold core and mold cavity does not adversely affect heating efficiency and homogeniety. For different coil intervals, the 18mm, 20mm, and 22mm distances have heating efficiencies of 9.81oC/s, 8.26oC/s, and 7.04oC/s respectively. From this, it is evident that an 18mm coil interval is more advantageous for heating efficiency.
Experimental results show different coil systems and coil intervals affect the heating efficiency of the mold surface whereas the interval between the mold core and mold cavity does not have an adverse effect. The comparison between ANSYS® simulation result and experiment result show the same trend for mold surface temperature. This experiment shows that ANSYS® can be used for simulation and give accurate result on the Externally Warped Coils Induction Heating process which generates an efficient and even heating effect on mold surface temperature fields.

並列關鍵字

Externally Warped Coils Induction Heating ； Dynamic Mold Temperature Control ； Magnetic-Thermal Coupled Analysis.

參考文獻

15.彭信舒，“射出成型模具表面瞬間加熱建置與分析之研究”，私立中原大學機械工程學研究所博士論文(2003)。

16.江志良，“動態模溫控制模擬驗證之研究”，私立中原大學機械工程學研究所碩士論文(2004)。

17.秦進傳，“微結構模具快速變溫技術之研究”，私立中原大學機械工程學研究所碩士論文(2005)。

20.林育増，“內部式感應加熱應用於模具快速加熱之研究”，私立中原大學機械工程學研究所碩士論文(2009)。

5.D. Yao and B. Kim, “Development of Rapid Heating and Cooling System for Injection Molding Applications”, Polymer Engineering and Science, 42, 2471-2481 (2002).