자동차용 사이드미러 하우징 성형용 금형 개발에 관한 연구

Abstract

The production of plastic products spends most of its time in the cooling process. The cooling time takes more than 66% of total injection cycle time in injection molding. So the efficient cooling is important to improve overall productivity by reducing the cooling time. Moreover, uniform cooling reduces the residual stress and improves the quality by maintaining accuracy and reliability of the measurement. Also, if the temperature on surface of the mold is maintained uniformly, high quality of products can be ensure without weld line and gas trap. Therefore, this study was investigated to improve the productivity by efficient design of cooling channel. In this study, the structure of the undercut was arranged to separated by a inside undercut and a outside undercut, and the slide core cooling of the core type-specific cooling circuit was proposed. On these basic research, undercut etching of cooling channel design and standardization work was presented about automotive side-mirror housing. An experiment of its mold were conducted and results of experiment were analyzed. Additionally, injection molding CAE was performed to ensure the rationality and the results of CAE were reflected in the design of mold.