Mechanics of Time-Dependent Materials

, Volume 13, Issue 3, pp 233–244 | Cite as

Experiments and prediction of in-cavity stress for injection molded part

  • Haihong Wu
  • Zhenfeng Zhao
  • Jie Sha


Prediction of residual stress of the injection molded polymers is one of the most challenging issues in this process. To investigate the development of this residual stress, creep experiments were carried out and creep rule was found. In the light of the experimental results, a creep model for predicting in-cavity stress of the molding was built. The elastic module of material was obtained with Tait equation and its viscous factor obtained with inversion method. In-cavity stress was calculated with the model and finite element method for an injection molded plate made by ABS. The predicted results was verified by the experiments and compared with relaxation model. The results showed that the new model was more accurate than relaxation model. The solution of the problem will effectively prompt the numerical simulation of injection molding, and will be a valuable development for the quality control.


Injection In-cavity stress Creep model 


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Copyright information

© Springer Science+Business Media, B. V. 2009

Authors and Affiliations

  1. 1.College of Electromechanical EngineeringHenan University of TechnologyZhengzhouChina
  2. 2.National Engineering Research Center for Advanced Polymer Processes TechnologyZhengzhou UniversityZhengzhouChina

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