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Simulation of Core Deflection in Powder Injection Molding

  • D. Ling , M. Gupta , P. R. Myers and R. K. Upadhyay
Published/Copyright: March 26, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 21 Issue 3

Abstract

Core deflection in powder injection molding is one of the main causes of the structural defects in the molded part. Simulation of the core deflection in the injection molding process requires solution of the fluid-solid interaction problem, in which the fluid flow and solid deformation problems are coupled along the fluid-solid interface. A three-dimensional finite element program was developed in this work for a non-isothermal injection molding simulation including the fluid-solid interaction effects. With the assumption of small deformation in the solid structure, the fluid flow problem is formulated in an Eulerian frame-work, whereas the solid structure problem is formulated in a Lagrangian framework. Numerical simulation of the filling stage of injection molding for an airfoil-shaped part is presented and compared with the experimental data. The predicted melt-front advancement as well as the pressure is in good agreement with the corresponding experimental results. The predicted core deflection during the filling stage of the injection molding process is also compared with the measurements on a molded part.

∗ Mail address: M. Gupta, Mechanical Engineering-Engineering Mechanics Department, Michigan Technological University, Houghton, MI 49931, USA. E-mail:

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Received: 2005-09-02
Accepted: 2006-01-10
Published Online: 2013-03-26
Published in Print: 2006-07-01

© 2006, Hanser Publishers, Munich

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https://doi.org/10.3139/217.0105

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. New Multicomponent Compatibilization System for Polyolefin/Polystyrene Blends
  5. Preparation and Characterization of HMW PA 6 via Anionic Polymerization of ∊-Caprolactam by Using a Mixture of Di- and Tri-functional Chain Initiators
  6. Polymer Processing Extrusion Instabilities and Methods for their Elimination or Minimisation
  7. Microcellular Wood Fibre Reinforced PP Composites
  8. Effects of Take-up Speed of Melt Spinning on the Structure and Mechanical Propertiesof Maximally Laser Drawn PA9-T Fibers
  9. Description of the Pressure/Throughput Behavior of a Single-screw Plasticating Unit in Consideration of Wall Slippage Effects for Non-Newtonian Material and 1-D flow
  10. Study of Starch Gelatinization in a Flow Field Using Simultaneous Rheometric Data Collection and Microscopic Observation
  11. Analysis of the Residual Stresses in the Process of Nanoimprint Lithography
  12. The Reactive Extrusion of Thermoplastic Polyurethane and the Effect of the Depolymerization Reaction
  13. Simulation of Core Deflection in Powder Injection Molding
  14. Experimental Investigation of the Cooling Flow in the Film Blowing Process
  15. Study of the Compatibilizer Effect on Blends Prepared from Waste Poly(ethylene-terephthalate) and High Density Polyethylene
  16. PPS News
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