探討結構式線圈設計對於感應加熱模具 表面溫度均勻性之影響

Investigation of the Influence of Structured Coil Design in Induction Heating on the Uniform of Mold Surface Temperature

鍾榮強(Edwin Kurniawan)

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/CYCU.2010.00576

摘要

目前3C 產品要求產品外觀高亮度及成型週期短，以達高 產量之需求。動態模具溫度控制技術於熔膠充填階段，維持高模 溫並在充填結束後快速冷卻降溫完成成型，可以增加塑料流動 性、微結構的複製性與縮短成型週期，達到提高產品品質的目 的。感應式加熱技術為動態模溫控制技術之一，但在加熱過程中 的模具表面溫度會有分佈不均勻的問題。因此，本研究將以線圈 的設計來探討加熱後模面的溫度均勻性，並尋找最佳的線圈幾何 設計。 本研究針對感應加熱線圈來探討其幾何形狀對於模面加熱 均勻性的差異。首先，採用分析軟體ANSYS®進行3D 分析比 較，設計4 種不同幾何之線圈，並評估加熱溫度均勻性與加熱效 率，根據分析結果得到2 種較佳的線圈設計後再與實驗進行比對 驗證。最後，實驗線圈探討4 種參數設計，線圈-模面距離(1, 3, 5mm)、線圈高度(40, 60, 80mm)、線圈間距(3, 5, 7mm) 和2 種線 圈橫截面形狀(正方形和圈)，進行公母模面雙邊加熱來比較其加 熱均勻性。 模擬結果顯示，採用最佳的加熱線圈設計，加熱時間2 秒 可以使模具表面溫度從初始40°C 到達最高91°C、加熱速度為 25.5°C/s。線圈設計之分析結果呈現，線圈距離越靠近模面(1mm) 可以達到最高的模面溫度；最小的線圈高度(40mm)，會有最均勻 的模面溫度分佈；最大的線圈間距(7mm)，會有最均勻的模面溫 度分佈，在線圈截面幾何結果，以正方形的截面形狀，會有較均 勻的溫度分佈。從案例實驗結果顯示，3D 的線圈設計能達到較 佳的加熱均勻性，加熱時間2 秒時，可使公、母模模具表面溫度 從初始40°C，分別被加熱到62.5°C 與64.5°C，與模擬結果公、 母模面最高溫度68.3°C 與68.0°C 有相近的結果趨勢。經由本論 文有系統的分析與研究，可得到最佳的線圈設計與參數，並有效 提升模面溫度均勻性。

關鍵字

動態模具溫度控制 ； 感應加熱 ； 溫度均勻性 ； 線圈設計

並列摘要

In the recent years, mold rapid heating technologies have been developed
all the time. The induction heating system is the most popular technology to make
the mobility of plastic so that it would result a better replication of micro-structure
and shorten the cycle time. Generally, the problem that usually occurs in the
induction heating process is the difficulty in controlling the uniformity
temperature during the heating process. Because of this phenomenon, this study
would analyze about the coil design in order to get a better uniformity temperature
during the heating process.
This study started from designed four coils design to compare each others
by using the ANSYS simulation software. Continued, with selected two coils
design and compared with the experiment results. Finally, in the last step, the best
coil designed was selected, continued with development the design. The coil’s
development is divided into four kinds (the coupling distance 1, 3, 5mm), (the coil
height 40, 60, 80mm), (the coil pitch 3, 5, 7mm) and (the coil cross sectional
shape, square and circle). For the study case, was the application of the coil design
to the double side heating.
The result showed that the best coil designed heated up from 40° C in 2
second, could reach max temperature for 91° C with heating speed for 25.5° C/s.
Moreover, the development for the coil design also showed that, the closer
coupling distance(1mm) produced higher temperature, smaller coil height (40mm)
produced better uniformity, larger coil pitch (7mm) produced better uniformity
(with certain limit), and the square cross sectional shape also produced better
uniformity temperature. Furthermore, for the study case result showed that, the 3D
coil design can produce good uniformity temperature. Heated up from 40° C in 2
second the experiment result showed cavity can produced max temp for 64.5° C
and core for 62.5° C. Finally, in simulation result showed cavity for 68.0°C and
core for 68.3° C.
By doing this study, a better coil designed with appropriate coil parameters
to produced better uniformity temperature during the heating process could be
reached.

並列關鍵字

Dynamic mold temperature control ； Induction heating ； Unif

參考文獻

Micro-Feature Parts Using Induction Heating Technology”, Journal of

Induction Heating”, Chung Yuan Christian University, Institute of Mechanical

1. S. C. Chen, H. S. Peng, J. A. Chang, and W. R. Jong, “Rapid Mold Surface

Heating or Cooling Using Electromagnetic Induction Heating”, ANTEC Tech.

2. S. C. Chen, W. R. Jong, Y. J. Chang, J. A. Chang, and J. C. Cin, “Rapid Mold