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Modeling and analysis of post ejection wall deflections in products made out of polypropylene
Author(s) -
AhuettGarza Horacio,
Aguiar Francisco,
Ponce Victor
Publication year - 2010
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21620
Subject(s) - polypropylene , materials science , thermoelastic damping , composite material , mold , enhanced data rates for gsm evolution , mechanical engineering , thermal , computer science , engineering , thermodynamics , telecommunications , physics
Dimensional control of injection molded products remains an important issue as applications require increasing precision. Accurate dimensions of a product result not only from well tuned manufacturing processes, but also from sound design and engineering analysis. This article introduces a model that predicts edge deformations of deep container walls. The model was developed using energy methods and predicts thermoelastic deformations caused by a drop in temperature once the part is released from the mold. The model was validated using results from FEA simulations as well as comparisons with field measurements of parts made of Polypropylene (PP). In general, good agreement was found. Material properties and process conditions were measured for the analyzed cases, which contributed to the accuracy of the results. POLYM. ENG. SCI., 2010. © 2010 Society of Plastics Engineers