금속분말 사출성형 제품의 공정능력분석에 관한 연구

A Study on the Process Capability Analysis of MIM Product

  • 발행 : 2010.02.15

초록

Metal Injection Molding (MIM) is attractive because it produces consistent, complex-geometry components for high-volume, high-strength, and high-performance applications. Also MIM using in optical communication field, display field, and semi-conductor field is a cost-effective alternative to metal machining or investment casting parts. It offers tremendous single-step parts consolidation potential and design flexibility. The objective of this paper is to study the suitability of design, flow analysis, debinding and sinterin processes, and capability analysis. The suitable injection conditions were 0.5~1.5 second filling time, 11.0~12.5 MPa injection pressure derived from flow analysis. The gravity of the product is measured after debinding an sintering. The maximum and minimum gravity levels are 7.5939 and 7.5097. the average and standard deviation are 7.5579 and 0.0122; when converted into density, the figure stands at 98.154%. According to an analysis of overall capacity, PPM total, which refers to defect per million opportunities(DPMO), stands at 166,066.3 Z.Bench-the sum of defect rates exceeding the actual lowest and highest limits-is 0.97, which translates into the good quality rate of around 88.4% and the sigma level of 2.47.

키워드

참고문헌

  1. Kim, S. W. and Donotzuka, 2000, "Actual Status of Metal Injection Molding Technology," Journal of the KSHT, Vol. 13, No. 2, pp. 126-131.
  2. Kwon, T. H., 1995, "Development of Metal Injection Molding Processing Technologies," Spring Conference of the KlMM, p. 111.
  3. Koo, Y. D., Kil, S. C., and Na, D. B., 2002, "Metal powder Injection Molding," KISTI Report, pp. 4-34.
  4. Hwang, C. J., Park, H. P., Koh, Y. B., Jung, S. T., and Lee, B. O., 2005, "CAE Analysis of Powder InJection Molding Process for Dental Scaler Mold," Proceedings of the KPMI Conference, pp. 47-49.
  5. KISTI, 2004, "Procss for Producing Ceramic Molding," KISTI Report, pp. 9-12.
  6. Young, J. H and Beaumont, J. P, 1997, "Mold Filling Imbalances in Geometrically Balanced Runner System," Journal of Injection Molding Technology, Vol. 1, No. 3, pp. 133-143.
  7. Yoon, T. S. and Ahn, S. H., 1992, "Preparation and Characterization of Feedstock for Metal Injection Molding," KIMM 4th Powder Metallurgy Symposium, pp. 137-145.
  8. Eun, K. Y., 1988, "Metal Injection Molding," KlMM Power Metallurgy Tech.(2), pp. 47-57.
  9. Lee, D. G., Jang, K. C., Jung, M. G., Kim, M. H., and Lee, J. B., 2009, "Multi-type Sleeve Combination CIM Manufacturing Technology," The Arabian Journal for Sci. and Eng., Vol. 34, No. IC, pp. 47-56.
  10. Beaumont, J. P.,Young, J. H., and Jawoski, M. J., 1998, "Solving Mold Filling Imbalance in MultiCavity Injection Molds," Journal of Injection Molding Technology, Vol. 2, No. 2, pp. 47-58.
  11. Cho, W. S, 1997, Injection Molding design Technology, GIJEON Books, Repub;ic of Korea, pp. 381-404.
  12. Rhee, B. O., Choi, J. H., and Tae, J. S., 2009, "Reduction of Design Variables for Automated Optimization of Injection Mold Cooling Circuit," Journal of the KSMTE, Vol. 18, No. 4, pp. 417-422.