外文翻译注塑模具的设计及其热分析英文版.pdfVIP

Journal of Materials Processing Technology 171 (2006) 259–267 Design and thermal analysis of plastic injection mould S.H. Tang ∗, Y.M. Kong, S.M. Sapuan, R. Samin, S. Sulaiman Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia Received 3 September 2004; accepted 21 June 2005 Abstract This paper presents the design of a plastic injection mould for producing warpage testing specimen and performing thermal analysis for the mould to access on the effect of thermal residual stress in the mould. The technique, theory, methods as well as consideration needed in designing of plastic injection mould are presented. Design of mould was carried out using commercial computer aided design software Unigraphics, Version 13.0. The model for thermal residual stress analysis due to uneven cooling of the specimen was developed and solved using a commercial finite element analysis software called LUSAS Analyst, Version 13.5. The software provides contour plot of temperature distribution for the model and also temperature variation through the plastic injection molding cycle by plotting time response curves. The results show that shrinkage is likely to occur in the region near the cooling channels as compared to other regions. This uneven cooling effect at different regions of mould contributed to warpage. © 2005 Elsevier B.V. All rights reserved. Keywords: Plastic Injection mould; Design; Thermal analysis 1. Introduction by “cooling stage” where the mould is cooled until the part is sufficiently rigid to be ejected. The last step is the “ejection Plastic industry is one of the world’s fas