DOI QR코드

DOI QR Code

Case Study of Practical Tool Training for Optimal Runner System

최적 유동시스템을 위한 실무금형교육 사례 연구

  • Shin, Ju-Kyung (Department of Mechanical Engineering, Osan University)
  • 신주경 (오산대학교 기계공학과)
  • Received : 2017.10.14
  • Accepted : 2017.11.06
  • Published : 2017.12.01

Abstract

In injection molding process, the runner system of the mold is a flow path for filling the cavity of the molded part during the advance of the screw by the force of the hydraulic cylinder, which involves the filling and packing process of the molten resin. Thus, the sprue, runner and gate greatly affect the appearance of the molded part, the physical properties of the resin, the dimensional accuracy and the molding cycle etc. Feed systems with incorrect runner and gate designs cause various molding defects, So it is important to maintain the optimum runner balance to prevent these defects. In order to improve the knowledge of practical mold technology, which is applied to the manufacturers of injection molds, a training model of the mold technology process is presented based on the technical guidance on the technical difficulties.

사출성형 시 유압실린더의 힘으로 스크류가 앞으로 전진하는 동안, 금형의 러너시스템은 성형품 형상의 캐비티 내를 충진시키는 유로로 용융된 수지의 충진, 패킹과정에 관계되며, 이는 스프루(sprue), 러너(runner), 게이트(gate)에 의해서 성형품의 외관, 수지의 물성, 치수 정밀도 및 성형 사이클 등에 큰 영향을 준다. 러너, 게이트 설계가 잘못된 피드시스템은 다양한 성형불량을 일으키므로 이를 방지할 수 있는 최적의 러너밸런스를 유지하는 것이 중요하다. 사출금형을 제작하는 업체에서 응용할 수 있는 실무적인 금형기술 지식을 향상시키기 위해서 기술적인 애로분야에 대한 기술지도를 바탕으로 금형기술 과정의 훈련모델을 제시한다.

Keywords

References

  1. D. H. Lee, D. C. Kang, K. Yi, and K. H. Jung, "An education-oriented industry and university collaboration model a case study of LG electronics and Handong University," Journal of Engineering Education Research, vol. 7, no. 3, pp. 32-38, May 2004.
  2. E. J. Song, "Practical engineering teaching method: A study on methodology for teaching improvement on the university," Journal of Practical Engineering Education, vol. 4, no. 1, pp. 45-50, June 2012.
  3. C. H. Oh, B. H. Kim, J. I. Kim, J. H. Ha, K. H. Ahn, and N. S. Kim, "Research on actual state and improving suggestion for practical engineering technician," KUT-HRD Research Center, Research Report 2010-01, February 2011.
  4. J. P. Beaumont, Runner and gating design handbook, Hanser, Munich, pp. 37-57, 2004.
  5. J. P. Beaumont, J. H. Young, and M. J. Jaworski, "Mold filling imbalances in geometrically balanced runner system," ANTEC, pp. 599-604, 1998.
  6. E. Erlenkamper, "Gate design for a high quality surface finish," Plastic Business Group, Application Technology Information (1125 d,e), pp. 8-22, 2000.
  7. G. Menges and P. Mohren, "How to make injection molds," Hanser, Munich, pp. 98-103, 1994.