Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Determination of Valve Gate Open Timing for Minimizing Injection Pressure of an Automotive Instrument Panel

자동차용 인스트루먼트 패널의 사출압력 최소화를 위한 밸브 게이트 열림 시점 결정

  • 조성빈 (한양대학교 기계공학과) ;
  • 박창현 (한양대학교 기계공학과) ;
  • 표병기 (브이엠테크 기술연구소 개발부) ;
  • 최동훈 (한양대학교 최적설계신기술연구센터)
  • Received : 2011.06.29
  • Accepted : 2011.11.26
  • Published : 2012.07.01
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Abstract

Injection pressure, an important factor in filling process, should be minimized to enhance injection molding quality. Injection pressure can be controlled by valve gate open timing. In this work, we decided the valve gate open timing to minimize the injection pressure. To solve this design problem, we integrated MAPS-3D (Mold Analysis and Plastic Solution-3Dimension), a commercial injection molding CAE tool, to PIAnO (Process Integration, Automation and Optimization), a commercial PIDO (Process Integration, and Design Optimization) tool using the file parsing method. In order to reduce computational cost, we performed an approximate optimization using meta-models that replaced expensive computer simulations. At first, we carried out DOE (Design of Experiments) using OLHD (Optimal Latin Hypercube Design) available in PIAnO. Then, we built Kriging models using the simulation results at the sampling points. Finally, we used micro GA (Genetic Algorithm) available in PIAnO. Using the proposed design approach, the injection pressure has been reduced by 13.7% compared to the initial one. This design result clearly shows the validity of the proposed design approach.

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References

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