Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
권호 표지

A study on the monitoring of cooling time using the change in the magnitude of mold vibration in injection molding

사출성형에서 공정 중 금형의 진동 크기 변화를 활용한 냉각시간 모니터링에 대한 연구

  • ;
  • 김종선 (한국생산기술연구원 금형성형연구부문)
  • Received : 2021.09.14
  • Accepted : 2021.09.30
  • Published : 2021.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, during the injection molding process, a device was manufactured and evaluated that calculates a cooling time by measuring a vibration signal generated from a mold using an acceleration. The last two parts, one of which has a large magnitude change in the measured vibration signal of a mold, were divided into a cooling start section (paking end section) and a mold opening section, and the time difference at the relevant points was calculated as the cooling time. The cooling time was monitored on a 5-inch light guide plate mold by applying the method. The manufactured device was attached to a fixed base of mold to measure the cooling time, and data was obtained remotely using Bluetooth technology. Then, the measured cooling time was compared with the cooling time set in the injection molding machine to evaluate the accuracy. As a result of the experiment, the cooling times measured by the devices were 15.675±0.024 sec, 20.637±0.014 sec and 25.623±0.079 sec of each conditions. Also, the measurement results were shown with errors of 0.655±0.044 sec, 0.637±0.014 sec, and 0.662±0.013 sec, respectively.

Keywords

Acknowledgement

본 연구는 한국생산기술연구원의 연구개발적립금사업(Project No. UR210040)의 지원으로 진행되었습니다.

References

  1. Hassan, H, "An experimental work on the effect of injection molding parameters on the cavity pressure and product weight", Int. J. Adv. Manuf. Technol., Vol. 67, pp. 675-686, 2013. https://doi.org/10.1007/s00170-012-4514-4
  2. Noh, K. C, Lee, G. H., Jang, M. K., and Jeong, Y. D., "Realation of Injection Temperature and Weld-quality in Injection Molding", J. D&M Eng., Vol. 9, No. 1, pp. 27-30, 2015.
  3. Mun, Y. B., Choi, Y. S., and Jung, Y. D., "Effects of holding pressure affecting cooling time in injection molding", IJ. D&M Eng., 2(1), pp. 39-43, 2008.
  4. Hwang, S. H., Seo, G. Y., Kim, C. K., Kim, M. G., Ji, S. D., and Jung, Y. D., "A study on the cooling analysis of plastic products with high aspect ratio", J. D&M Eng., 2(2), pp. 6-9, 2008.
  5. Chen, J. Y., Yang, K. J., and Huang, M. S., "Online quality monitoring of molten resin in injection molding", Int. J. Heat Mass Transfer, 122, pp. 681-693, 2018. https://doi.org/10.1016/j.ijheatmasstransfer.2018.02.019
  6. Lee, J. H., and Kim, J. S., "A study on monitoring for process time and process properties by measuring vibration signals transmitted to the mold during injection molding", J. D&M Eng., 14(3), pp. 8-16, 2020.