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Numerical Analysis of Mold Deformation Including Plastic Melt Flow During Injection Molding

플라스틱 유동을 고려한 사출성형 충전공정 중 금형의 변형 해석

  • Jung, Joon Tae (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Lee, Bong-Kee (School of Mechanical Engineering, Chonnam Nat'l Univ.)
  • 정준태 (전남대학교 기계공학부) ;
  • 이봉기 (전남대학교 기계공학부)
  • Received : 2014.02.21
  • Accepted : 2014.05.08
  • Published : 2014.07.01

Abstract

In the present study, a numerical analysis of an injection molding process was conducted for predicting the mold deformation considering non-Newtonian flow, heat transfer, and structural behavior. The accurate prediction of mold deformation during the filling stage is important to successfully design and manufacture a precision injection mold. While the local mold deformation can be caused by various factors, a pressure induced by the polymer melt is considered to be one of the most significant ones. In this regard, the numerical simulation considering both the melt filling and the mold deformation was carried out. A mold core for a 2D axisymmetric center-gated disk was used for the demonstration of the present study. The flow behavior inside the mold cavity and temperature distribution were analyzed along with the core displacement. Also, a Taguchi method was employed to investigate the influence of the relevant parameters including flow velocity, mold core temperature, and melt temperature.

Keywords

Injection Molding;Numerical Analysis;Mold Deformation;Polymer Melt;Taguchi Method

Acknowledgement

Supported by : 한국연구재단

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