Investigation on the Quick Temperature Uniformity During Mold Temperature Control

• Main Authors: Ying-Chieh Wang, 王膺傑
• Other Authors: Shia-Chung Chen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/87295478677719229688

博士 === 中原大學 === 機械工程研究所 === 99 === Mold temperature control has become more and more important during injection molding process. Especially, it has great effect on the thin wall parts, micro feature parts precision parts and high gloss parts. As a result, mold temperature control has become a popular research topic in many research departments. In this study, the new temperature control method has been applied to improve the temperature uniformity during induction heating. The finite element method not only has been applied to design the induction coils but also has been applied to reveal the induction coil effects on temperature uniformity. Besides, three different distances 6mm, 11mm and 16mm between coil and mold surface are employed to study the heating effect with 6 seconds heating time. The temperature sensors and the infrared ray camera have been applied to observe the temperature uniformity. It was found that the new temperature control method can improve the temperature uniformity very well. With the same coil length, the new temperature control method can not only increase 20% heating efficiency but also have excellent temperature uniformity. The optimized coil has the best temperature difference in 40% when the coil and mold surface is 6mm. Besides, the optimized coil has 25% improvement when the traditional coil’s temperature difference is 65% with the same process parameters. The simulation results shown the magnetic fields are very consistent to the temperature distribution and very similar to experiment results. The finite element method can be a very useful and efficient tool for coil design and temperature distribution.