Quantitative study of shrinkage and warpage behavior for microcellular and conventional injection molding

Adam Kramschuster, Ryan Cavitt, Donald Ermer, Zhongbao Chen, Lih Sheng Turng*

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

109 引文 斯高帕斯(Scopus)

摘要

This research investigated the effects of processing conditions on the shrinkage and warpage (S&W) behavior of a box-shaped, polypropylene part using conventional and microcellular injection molding. Two sets of 2 6-1 fractional factorial design of experiments (DOE) were employed to perform the experiments and proper statistical theory was used to analyze the data. After the injection molding process reached steady state, molded samples were collected and measured using an optical coordinate measuring machine (OCMM), which had been evaluated using a proper R&R (repeatability and reproducibility) measurement study. By analyzing the statistically significant main and two-factor interaction effects, the results show that the supercritical fluid (SCF) content (nitrogen in this case, in terms of SCF dosage time) and the injection speed affect the S&W of microcellular injection molded parts the most, whereas pack/hold pressure and pack/hold time have the most significant effect on the S&W of conventional injection molded parts. Also, this study quantitatively showed that, within the processing range studied, a reduction in the S&W could be achieved with the microcellular injection molding process.

原文英語
頁(從 - 到)1408-1418
頁數11
期刊Polymer Engineering and Science
45
發行號10
DOIs
出版狀態已出版 - 10 2005
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