Experimental and numerical investigation of shrinkage and warpage of a U-shaped injection molded part

Stefan Kleindel, Roland Eder, Herwig Schretter, Christoph Hochenauer

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Prediction of shrinkage and warpage of injection molded plastic parts is a key issue of injection molding simulation. In the present work a U-shaped part is investigated experimentally and by means of state of the art injection molding simulation software. The part has thick walls in the corner where inner defects such as voids and porous zones may appear. Experiments and simulations were performed with POM and glass fiber reinforced polyamide. Measurements of pressure in the cavities and temperature profiles around the cavities were used to validate the numerical model. In case of POM it was found that warpage predictions are way off when the void volume is high and in good agreement when the void volume is minimized. No such correlation was observed in case of fiber reinforced materials. Here, shrinkage and warpage are dominated by the fiber orientation state with minor influence of the processing conditions. Predicted warpage was found to be extremely dependent on the used closure approximation.

Originalspracheenglisch
Seiten (von - bis)68-81
Seitenumfang14
FachzeitschriftInternational Polymer Processing
Jahrgang31
Ausgabenummer1
DOIs
PublikationsstatusVeröffentlicht - 1 Mär 2016

ASJC Scopus subject areas

  • !!Chemical Engineering(all)
  • !!Polymers and Plastics
  • !!Industrial and Manufacturing Engineering
  • !!Materials Chemistry

Fields of Expertise

  • Mobility & Production

Treatment code (Nähere Zuordnung)

  • Theoretical
  • Experimental

Fingerprint Untersuchen Sie die Forschungsthemen von „Experimental and numerical investigation of shrinkage and warpage of a U-shaped injection molded part“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren