感應式變溫技術應用於模具邊角加熱控制之研究

Study on the Edge-Effect Temperature Control Using Induction Heating Technology

陳思帆(Szu-Fan Chen)

指導教授 ： 陳夏宗

中原大學/工學院/機械工程研究所/碩士(2011年)

https://doi.org/10.6840/cycu201100645

摘要

現今的射出成型製程中，動態模溫控制技術慢慢為業界所接受且運用。其中，感應加熱具備有高模溫與短週期的條件，但由於感應加熱對於盒狀的模具加熱，溫度場分佈會有不均勻的現象，造成產品表面品質問題。本研究利用感應式變溫技術應用於模具邊角加熱控制技術包含感應加熱參數影響性、水路分區溫控、改變模具段差設計，並以分析軟體ANSYS®作模塊溫度場分析與驗證，以確認分析可行性。最後，探討此製程對不同線圈設計於高段差面加熱均溫性之影響。
研究結果顯示，分模線平行線圈間距對於邊角效應影響性較大，而模面垂直線圈間距則是影響到加熱速率；所以，分模線平行線圈間距為-15 mm，模面垂直線圈間距為3mm時加熱均勻性佳，加熱線圈越靠近邊角，其邊角的溫度越高，且表面的溫度分佈實驗結果與模擬分析結果比較後趨勢一致。當線圈限制在分模線之上時，搭配水路分區溫控的情況下對模具表面進行加熱，其邊角與加熱面的溫度經過冷卻時間後溫差為18oC，表示水路分區溫控是有效降低邊角與加熱面的溫度差。而降低模塊的段差高度能使邊角與加熱面的溫度相差為0oC，隨著模塊的段差高度降低，達到一致的邊角溫度與加熱面溫度，所需的冷卻時間也隨之減少，且溫度也相對提高至185oC，可明顯得知，感應加熱能有效控制模具邊角溫度。在不同線圈設計於高段差面加熱均溫性實驗結果得知，溫度分佈與線圈的形狀有重大關係，兩層多匝平面式線圈的加熱速率比單層多匝平面式線圈高，且也較均溫，同時也證明此線圈設計的可行性。

關鍵字

感應加熱 ； 磁熱耦合分析 ； 動態模溫控制

並列摘要

In the injection molding process, dynamic mold temperature control method was gradually accepted and used by the industry. Induction Heating technology is capable to achieve both high temperature and short cycle time with a given molding condition, but Induction heating make the box-like in shape mold temperature distribution uneven caused by the product defects. Study on the Edge-Effect Temperature Control Using Induction Heating Technology, different water temperature control and different design of mold high cross-section. The experimental results are then compared to the 3D simulation model using ANSYS® software. Final, this process use different of coil design for the mold high cross-section of the effect of temperature distribution.
The results of this study shows that the pitch of parting line parallel coil affect the corner effect, while the pitch of vertical coil affect the meating rate and the mold surface vertical. When the pitch of parting line parallel coil was -15mm and the pitch of mold surface vertical coil was 3mm.The efficiency of heating is the best. And, the coil closer to the mold corner, the corner had high temperature. The simulation results is similar with the experimental results simulation and analysis. When the coil above the parting line with the different mold temperature, the corner and heating surface difference temperature were 18℃ after the cooling time. Learned from this method was effective. Changing the hight of mold’s cross-section will reduce the difference of temperature to 0℃. With the reduced of mold high cross-section, the corner temperature and heating surface temperature were same and can reduce cooling time to the temperature was 185℃. We can learn the strongly relationship from temperature distribution to the coil shape by the experiments of the mold high cross-section with different design of the coil, temperature distribution with the coil shape has a relationship. The heating efficiency and temperature uniformity in two layers coil is better than one layer coil. It also proved feasibility for two layer of coil.

並列關鍵字

Magnetic-Thermal Coupled Analysis ； Dynamic Mold Temperature Control ； Induction Heating

參考文獻

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