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http://dx.doi.org/10.14775/ksmpe.2018.17.6.098

A Study on the Process Optimization of Microcellular Foaming Injection Molded Ceiling Air-Conditioner 4-Way Panel  

Kim, Joo-Kwon (PRI, LG Electronics lnc.)
Lee, Jung-Hee (Department of Mechanical Engineering, Pukyoung National UNIV.)
Kim, Jong-Sun (Molds and Dies Technology Group, Korea Institute of Industrial Technology)
Lee, Jun-Han (Molds and Dies Technology Group, Korea Institute of Industrial Technology)
Kwak, Jae-Seob (Department of Mechanical Engineering, Pukyoung National UNIV.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.17, no.6, 2018 , pp. 98-104 More about this Journal
Abstract
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.
Keywords
Ceiling Air-conditioner; Deformation; Dew Condensation; Microcellular Foaming; Process Optimization;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Kim, J. K., Kim, J. S., Lee, J. H., and Kwak, J. S., "A Study on the Optimization of the Dimensional Deviation due to the Shortening of the Cycle Time for Rear Cover of Mobile Phone," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 16, No. 6, pp. 117-124, 2017.   DOI
2 Kim, J. K., Kim, J. S., Lee, J. H., and Kwak, J. S., "A Study on Dimension Optimization of Injection-molded Automotive Bumper by Six Sigma," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 16, No. 6, pp. 109-116, 2017.   DOI
3 Turng, L. S., and Kharbas, H., "Effect of process conditions on the weld-line strength and microstructure of microcellular injection molded parts," Polymer Engineering and Science, Vol. 43, No. 1, pp. 157-168, 2003.   DOI
4 Hwang, S. S., and Ke, Z. S., "The dimensional stability of a microcellular injection molded gear shaft," International Communications in Heat and Mass Transfer, Vol. 35, No. 3, pp. 263-275, 2008.   DOI
5 Xi, Z., Sha, X., Liu, T., and Zhao, H., "Microcellular injection molding of polypropylene and glass fiber composites with supercritical nitrogen," Journal of Cellular Plastics, Vol. 50, No. 5, pp. 489-505, 2014.   DOI