近幾年，因為光電產業、微生醫晶片、微電路印刷板、光學薄膜、導光板、非球面光學透鏡等精密電子零件發展，其產品生命週期較短且量產需求增大，影響產品精度與生產速度要求較傳統產品更為嚴苛。因此，使用電磁感應加熱之議題漸漸被提出且尚待完整技術突破，此技術具有加熱速度快、能源利用率高之優點，將應用電磁感應加熱技術於射出成形製程，以改善射出件之縫合線、高亮面、熱應力等常見不良缺陷成品。
本研究著重於小面積加熱、局部面積加熱及大面積加熱，加熱工件為SKD 61，透過凹形線圈、七吋矩形線圈及十四吋柵欄式線圈等線圈設計，再搭配磁場集中器擺放方式，經由測試實驗可得加熱速率分別為3.21 oC/sec、5.63 oC/sec及1.86 oC/sec；溫度均勻性分別達到95.56%、92.27%及88.80%。
本研究亦著重於熱澆道系統，加熱工件為熱澆道，透過線圈設計，搭配磁場集中器擺放方式，經由測試實驗可得加熱速率及溫度均勻性，分別為2.06 oC/sec及95.51%。並且發展新的纏繞線圈方法比傳統纏繞線圈方式更能使得熱澆道表面能夠均勻受熱及高溫度均勻性。

In recent years, the optoelectronics industry, micro-health chips, micro-printed circuit boards, optical film, light guide plates, non-spherical optical lenses and other high precision electronic components had been developed. Shorter life cycle of product and increased quantities of products had affected the precision and production speed requirements of products. Therefore, a new technology of using electromagnetic induction heating with higher heating speed, high energy efficiency was proposed. This system is easy to implement and is inexpensive. Thus, the new system is expected to be popular among the molders, applying the electromagnetic induction heating technology to injection molding process in order to improve part quality without welding lines, and with highlight surface, low thermal stress.
In this thesis, small area heating, local area heating and large area heating were concerned, did the test experiments through coil design of the concave type coil, seven-inch ring type coil and fourteen-inch parallel type coil with magnetic flux concentrators placed method. According to the result of coil test experiments, heating rate were 3.21 oC/sec, 5.63 oC/sec and 1.86 oC/sec and temperature uniformity were 95.56%, 92.27% and 88.80% respectively.
In this thesis, hot runner system was also concerned, did the test experiments through coil design and magnetic flux concentrators placed method. According to the result of coil test experiments, heating rate and temperature uniformity were 2.06oC/sec and 95.51% respectively. And a new wire winding method was developed to heat the hot runner from outer surface and had better temperature uniformity in comparison to the traditional wire winding method.

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