Integrated simulation to predict warpage of injection molded parts

Takaaki Matsuoka, Jun‐Ichi ‐I Takabatake, Akihiko Koiwai, Yoshinori Inoue, Satoru Yamamoto, Hideroh Takahashi

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Injection molding analysis programs were developed for CAE (Computer Aided Engineering) in injection molding of thermoplastics. The programs consist of mold cooling, polymer filling‐packing‐cooling, fiber orientation, material properties and stress analyses. These programs are integrated to predict warpage of molded parts by using a common geometric model of three dimensional thinwalled molded parts. The warpage is predicted from temperature difference between upper and lower surfaces, temperature distribution, flow induced shear stress, shrinkage, and anisotropic mechanical properties caused by fiber orientation in the integrated simulation. The integrated simulation was applied to predicting warpage of a 4‐ribbed square plate of glass fiber reinforced polypropylene for examination of its validity. Predicted saddle‐like warpage was in good agreement with experimental one.

Original languageEnglish
Pages (from-to)1043-1050
Number of pages8
JournalPolymer Engineering & Science
Volume31
Issue number14
DOIs
Publication statusPublished - Jul 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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