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An Investigation of Surface Appearance of an Injection-Molded Plastic Part with Various Induction Heating Conditions  

Sohn, Dong-Hwi (School of Mechanical Design and Automation Engineering, Seoul National University of Technology)
Seo, Young-Soo (School of Mechanical Design and Automation Engineering, Seoul National University of Technology)
Park, Keun (School of Mechanical Design and Automation Engineering, Seoul National University of Technology)
Lee, Kwang-Woo (Mobase Co., Ltd.)
Publication Information
Elastomers and Composites / v.44, no.4, 2009 , pp. 358-365 More about this Journal
Abstract
High-frequency induction is an efficient way to rapidly heat mold surface by electromagnetic induction. In the present work, high-frequency induction heating is applied to injection molding of a mobile phone cover in order to eliminate weldlines by efficiently raising the mold temperature. Through the induction heating experiments, the maximum temperature of $143^{\circ}C$ is obtained on the mold surface in 3s of heating, which is higher than the glass transition temperature of the resin material. An injection molding experiment is then performed with the aid of induction heating, from which we can successfully remove all the weldlines of the mobile phone cover. The effect of induction heating conditions such as the heating power and the heating time on the surface appearance is experimentally investigated.
Keywords
injection molding; high-frequency induction heating; weldline;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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