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A Study on the Process Optimization of Microcellular Foamed Ceiling Air-Conditioner 4-Way Panel
Joo-Kwon Kim(김주권),Jung-Hee Lee(이정희),Jong-Sun Kim(김종선),Jun-Han Lee(이준한),Jae-Seob Kwak(곽재섭) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.6
Deflected 4-way panels of ceiling air conditioners produced by injection molding process have caused dew condensation at the edge of products. In order to prevent this drawback with reducing weight and deformation, this study proposed renovated process adopting microcellular foaming. According to results from 2-sample t-test and analysis of variance(ANOVA), the critical factors affecting weight were melt temperature and injection speed. In addition, the vital effects on deformation were structure at the edge, mold temperature and cooling time. Optimal conditions of these parameters were derived by regressive analysis with CAE and response surface method(RSM), and then applied to an actual design and process stage to analyze performance. As a results, it clearly showed that new process improved process capability as well as reduced both weight and deformation by 18.8% and 71.9% respectively compared to the conventional method.