Investigation on Heating Injection Mold of 3D Structure Design by Using External Induction Heating

• Main Authors: Tsung-Hsien Hsieh, 謝宗顯
• Other Authors: Shia-Chung Chen
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/psma5b

碩士 === 中原大學 === 機械工程研究所 === 103 === By growing of the consumer market, the amount of production and the surface quality of 3C product are gradually emphasized. Because of plastic products, made by injection molding, the utilizing of dynamic mold temperature control raised up mold temperature and cool down in a short time brings about the defect of the product appearance solved; additionally, decreasing of shorter cycle time to provide higher economic benefits. In this study, we used 3D induction coil design for exterior heating, and investigated the heating feasibility and temperature uniformity. For investigation, at first, we used ANSYS to evaluate the heating feasibility between 2D traditional coil and 3D induction coil design. Secondly, heating experiment was conducted by changing mold temperature, heating distance, and heating time. Finally, we tried to improve the temperature uniformity by four different kind of coil designs and verified with ANSYS results. The results shows that the 3D design can heat up non-planarity of mold surface efficiently instead of the 2D design’s. Moreover, the experiment results reveal that the ideal temperature uniformity was appeared under 3s heating time, and the temperature difference of two trapezoidal sidewall mold surfaces are 41.3% and 47.5%. In the last part, we succeeded to improve temperature discrepancy on two sidewall surfaces. The temperature discrepancy are from 41.3% and 47.5% to the better result of 21.3% and 24.5%, respectively. In other words, the temperature uniformity was enhanced as well, especially, in the Design 3. Furthermore, the design in which put magnetic block in the center of induction coil can improve the heating uniformity. In the experiment and analysis, IHTC test of 3D induction coil was built successfully, and verifying with the simulation results.