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Molding Design Factors Optimization for Maximizing Shrinkage Uniformity of Injection Molded Part using Design of Experiments  

Park, Jong-Cheon (금오공과대학교 기계공학과)
Kim, Kyung-Mo (금오공과대학교 산업공학부)
Yin, Jeong-Je (인덕대학교 기계설계과)
Lee, Jae-Hoon (금오공과대학교 기계공학부)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.10, no.6, 2011 , pp. 70-76 More about this Journal
Abstract
This paper presents an optimization procedure for reducing warpage of injection molded part by using a volumetric shrinkage deviation as an objective function. A design of experiments based on orthogonal arrays was used in the optimization procedure, and the entire optimization was performed through a two stage process - a preliminary experimentation and a principal experimentation. Proposed optimization method was applied to the design of a CPU-base part in computer. With the moderate number of experiments, an optimal molding condition for uniform distribution of volumetric shrinkage was obtained, as a result, the warpage of the molded part was significantly reduced.
Keywords
Warpage; Volumetric Shrinkage; Design of Experiments; Orthogonal Arrays; Injection Molding;
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