Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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A Study on the Improvement of Double Injection-molding Keypad Process

이중 사출 키패드 성형 공정 개선에 관한 연구

  • 홍민성 (아주대학교 기계공학부) ;
  • 이지훈 (아주대학교 대학원 기계공학과) ;
  • 신수현 (아주대학교 산업대학원 기계공학과)
  • Received : 2011.07.08
  • Accepted : 2011.08.06
  • Published : 2011.10.15
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Abstract

Recently, the plastic resin such as PC, ABS are widely used in IT market. Especially, in most cases the keypads mounted on the mobile phone are the dual-injection-plated type. Environmental regulation is based on the quality of injection-molded products and the minimum process steps are required to avoid the plating defects. Various parameters to produce the injection-molded plastic products make it difficult to obtain the desired stability. However, the past experience and the use of CAE analysis make it possible to predict the problems occurred in injection molding process. Especially, the problems of the weld lines such as runner balancing, bending, deformation and forming defects can be solved systematically and minimized by CAE analysis. Through this study, the non-uniform volumetric shrinkage and the difference in temperature distribution induce the deformation and the high value of stress causes the problems such as crack.

Keywords

Acknowledgement

Supported by : 한국산업기술재단

References

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