Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
권호 표지
DOI QR코드

DOI QR Code

Improvement of Insert Molding for Refrigerator Glass Shelves Using Numerical Analysis

수치해석을 이용한 냉장고용 유리선반 성형용 인서트 금형의 개선

  • Han, Seong-Ryeol (Department of Metalmold Desing Engineering, Kongju National University)
  • 한성렬 (공주대학교 금형설계공학과)
  • Received : 2016.08.30
  • Accepted : 2016.09.26
  • Published : 2016.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

Refrigerator glass shelves are manufactured by Insert Injection Molding. The current process of injection of glass into the mold induces movement of the core, on urethane springs. Defects in the product can result from too low a force being transmitted from the springs. To solve this problem, the force on the moving core and the injection molding pressure were subjected to numerical analysis. Based on this, the number of urethane springs as well as their hardness was changed to improve the situation. The number of springs was changed from 6 to 4. The diameter of the springs was increased from ${\emptyset}75$ to ${\emptyset}100$, and the hardness was increased from 70 (shore A) to 90 (shore A). These improvements caused the force on the molding core to increase by approximately 65,442 N. The proportion of defects decreased by 66%.

Keywords

References

  1. Kazmer, D. O., Injection Mold Design Engineering, Hanser, pp. 437-439, 2016.
  2. Campo, E. A., The Complete Part Design Handbook for Injection Molding of Thermoplastics, Hanser, pp. 239-256, 2006.
  3. Kim, K. M., "The Prospect of CAE Application Using Midas NFX on Construction Machinery Field," Journal of Drive and Control, Vol. 9, No. 1, pp. 44-51, 2012. https://doi.org/10.7839/ksfc.2012.9.1.044
  4. Choi, K. K., Hong, S. M. and Han. S. R., "Effect of Flow Pattern of Coolant for Injection Mold on the Deformation of Injection Molding," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 14, No. 4, pp. 92-99, 2015.
  5. Han, S. R., Kand, C. M., Han, K. T., and Jeong, Y. D., "A Study on the Filling Imbalances between Multi-Cavity in Hot-Runner Mold," Journal of the Korean Society for Precision Engineering, Vol. 22, No. 9, pp. 173-178, 2005.
  6. Choi, Y. S., Han, D. Y. and Jeong. Y. D., "Shrinkage Behaviors of Polypropylene according to Product Form in Injection Molding," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 3, No. 3, pp. 46-51, 2004.

Cited by

  1. Analysis of Door Height Difference and Door Flatness Difference of Built-in Side-by-Side Refrigerator Using Cabinet-Door Integrated Model vol.17, pp.5, 2018, https://doi.org/10.14775/ksmpe.2018.17.5.076