Study on the Establishment and Analyses of Gas-Assisted Dynamic Mold Temperature Control System

• Main Authors: Chun-Feng Yeh, 葉俊鋒
• Other Authors: Shia-Chung Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/14964127617177690553

碩士 === 中原大學 === 機械工程研究所 === 95 === As the technology of mold process advances, the high quality of products is demand gradually. High mold temperature provides great contributions for the injection molding parts, but it always increases cycle time. However, dynamic mold temperature control system could not only decrease cycle time but also improve quality. It keeps high mold temperature during the filling stage and decreases mold temperature rapidly during the cooling stage. This study is established Gas-assisted dynamic mold temperature control system (GDMTCS) first, and the parameters of process including gas temperature, distance between air outlet and mold surface, heating time and stamp material also analyzed. Analyze the mold temperature field in different heating methods include traditional mold temperature control (TMTC) and GDMTCS by ANSYS software. In addition, compare GDMTCS with induction heating system(IHS) in high mold temperature condition. GDMTCS was also applied to biochip mold with micro channel, and can improve the geometric of the micro channel and the quality. It was found that the mold surface temperature increases from 60℃ to 120℃takes 186 seconds by TMTC but only 2 seconds by GDMTCS. In addition, the mold surface temperature decreases from 120℃to 60℃ takes 84 seconds by TMTC but only 21 seconds by GDMTCS. The result shows that the GDMTCS was better than TMTC. The Feasibility was proved here by analysis successfully, because experiment result was relatively closed to simulation result. In conclusion, it was found that IHS will destroy the stamp mold with micro feature. Moreover, GDMTCS was applied to micro injection molding successfully. Hence, the experiment results show significant feasibility and high potential in injection molding application.