NDLI: Shrinkage predictions of injection moulded parts in semi-crystalline polymers: experimental verification

Content Provider	IEEE Xplore Digital Library
Author	Gordillo, A. Ariza, D. Sanchez-Soto, M. Maspoch, M.L.I.
Copyright Year	1999
Description	Author affiliation: Centre Catala del Plastic, Barcelona, Spain (Gordillo, A.)
Abstract	The aim of this work is to explore the concordance between the shrinkage of injection moulded parts and its simulation from a commercial CAE system (C-Mold from AC Technology). An isotactic polypropylene was injected in a normalized mould following a standard test method for measuring part shrinkage. The influence of geometrical factors (like part thickness, length, longitudinal and normal flow orientation) has been studied. Also, the effect of process conditions (injection temperature holding pressure and time of application of holding pressure) has been taken into account. The need for using appropriated PVT curves is deducted from this work. In order to achieve accurate results, these curves should be built with similar cooling rates to the injected parts, especially in semi-crystalline polymers. The use of PVT curves obtained under equilibrium induce overestimation of the shrinkage. This work is included in the project of the development of an intelligent software for mould design, "Multimold".
Starting Page	1281
Ending Page	1287
File Size	501304
Page Count	7
File Format	PDF
ISBN	0780356705
DOI	10.1109/ETFA.1999.813136
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-18
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polymers Filling Computer aided engineering Temperature Geometry Material properties Viscosity Stress Plastics Measurement standards
Content Type	Text
Resource Type	Article

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