Experimental and Numerical Investigation of Injection Molding Main Parameters’ Effects on Shrinkage and Warpage of a Thin Sheet Made of HDPE
Publish place: International Journal of Advanced Design and Manufacturing Technology، Vol: 15، Issue: 3
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ADMTL-15-3_003
تاریخ نمایه سازی: 8 آذر 1401
Abstract:
Injection molding is one of the common processes for producing plastic parts. In this process, the mold is filled immediately and then the part and mold will be cooled down during the packing time. In the end, the part will be ejected from the mold. In this study, the effects of the most important processing parameters such as packing time, melt and mold temperature have been investigated on shrinkage and warpage of the products experimentally and numerically. According to previous reports, a thin sheet is defined by a length to thickness ratio of at least ۱۰۰. MOLDFLOW software has been utilized to obtain the numerical results. For the empirical study, ۶۴ specimens have been produced in different production conditions. These samples have been scanned by a ۳D scanner and results have been analyzed by CATIA software. The findings show that increasing melt and mold temperature decreases the warpage amount and rises the shrinkage in the specimens. Also increasing the packing time up to ۲ seconds increases the warpage and decreases the shrinkage noticeably but in longer packing times the variations will be less remarkable. Moreover, findings show that the general trend in simulated and experimental results are similar in all reported values of shrinkage and warpage, in which the maximum calculated errors for both of them are approximately ۱۰%.
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Authors
Ali Massah
Department of Mechanical ngineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran
Nathan Jafarian Jam
Department of Mechanical Engineering, Pardis Branch, Islamic Azad University, Pardis, Iran
Ehsan Soury
Department of Mechanical Engineering, Arak University, Arak, Iran
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