Study on Induction Heating Coil for Uniform Mold Cavity Surface Heating

Author:

Sung Yu-Ting1,Hwang Sheng-Jye1,Lee Huei-Huang2,Huang Durn-Yuan3

Affiliation:

1. Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan

2. Department of Engineering Science, National Cheng Kung University, Tainan 70101, Taiwan

3. Department of Sports, Health and Leisure, Chung Hwa University of Medical Technology, Tainan 71703, Taiwan

Abstract

Recently, energy saving is one of the important issues for polymer processing industry. Electromagnetic induction heating has many advantages such as fast heating and low energy consumption. Previous studies using electromagnetic induction heating for rapid tool heating have indicated that the temperature uniformity on a cavity surface is not easy to be achieved. In this paper, two different coils were used for heating uniform 7 mm thick hot work tool steel (JIS SKD61) surface. One is a four-row coil with opposite current directions and the other is a two-row coil with identical current directions. Magnetic flux concentrators were used to control magnetic field and heat the workpiece uniformly. The heating experiment results showed that coil with opposite adjacent current directions had more uniform temperature distribution on tool surface. The temperature uniformity was about 94%∼95%. The coil with identical adjacent current directions had higher average temperature and the temperature rose from 50°C to 150°C in 15 seconds.

Publisher

SAGE Publications

Subject

Mechanical Engineering

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