한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제16권8호
  • /
  • Pages.5074-5081
  • /
  • 2015
  • /
  • 1975-4701(pISSN)
  • /
  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
권호 표지
DOI QR코드

DOI QR Code

급속냉각·가열장치에 따른 사출성형품의 휨에 관한 연구

A Study on the Warpage of Injection Molded Parts for the rapid Cooling and Heating Device

  • 이민 (부경대학교 대학원 기계공학과) ;
  • 김태완 (부경대학교 기계공학과)
  • Lee, Min (Graduate School of Mechanical Engineering, Pukyong National University) ;
  • Kim, Tae-Wan (Dept. of Mechanical Engineering, Pukyong National University)
  • 투고 : 2015.05.20
  • 심사 : 2015.08.06
  • 발행 : 2015.08.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

플라스틱 제품의 휨을 개선하기 위한 방법은 사출성형 공정에서 일어나는 불균일한 냉각을 균일하게 만들어 플라스틱 제품의 잔류응력을 제거하는 방법이다. 본 연구는 균일한 냉각을 위하여 펠티에 소자를 사용하여 급속가열 냉각 장치를 개발하였다. 급속냉각 가열 장치(RCHD)를 제작하여 전통적인 수냉 장치(TWCD)방식과 급속냉각 가열 장치방식에 따른 휨을 비교 분석하였고, 비결정성 수지인 ABS 수지를 사용하였다. 사출성형 조건인 보압시간, 금형온도, 냉각시간, 보압에 따라 휨의 변화량을 측정 비교하였고, 비결정성 ABS 수지에서 급속가열 냉각 장치 냉각방식이 전통적인 수냉방식 보다 휨이 더 적게 발생하고, 위의 결과들로 보아 조금 더 균일하게 냉각되는 것을 알 수 있었다. ABS 폴리머의 분포 상태를 SEM 사진을 통해서 확인하였다. 전통적인 수냉방식은 폴리머의 분포상태가 조밀하게 분포되어 있고, 급속냉각 가열 방식은 전통적인 수냉방식 보다 넓게 분포되어 있었다. 이것은 냉각이 균일하게 이루어지고, 금형의 온도가 서서히 진행되면서 폴리머의 입자가 커지게 되는데, 이것은 내부응력이 줄어든 것을 의미한다.

A method for improving the warpage of the plastic part is a method of removing residual stress of the plastic product. that a non-uniform cooling are appeared in the injection molding process make uniform cooling. this study was developed the Rapid heating and cooling device used peltier module for uniform cooling. Make the Rapid heating and cooling device(RCHD), for Traditional water cooling device(TWCD) method and the Rapid heating and cooling method warpage were compared and were analyzed and the materials used amorphous ABS polymer. various warpage were compared for the process parameters such as packing pressure, packing time, resin temperature, mold temperature, In the amorphous ABS polymer, TWCD method has higher warpage than RCHD method and show the result to be a bit more uniform cooling. The distribution state of the ABS polymer was confirmed Through the Scanning electron microscope. In the TWCD method the distribution state of the polymer be densely distributed, and RCHS method be distributed wider than TWCD method. this is that injection molded parts be seen that cooling was made uniformly, As the temperature of the mold is gradually progress, Particles of the polymer is increased this is that internal stress was reduced.

키워드

참고문헌

  1. D. M. Moon, T. G. Choi and M. -Y. Lyu, "Prediction of mechanical property of glass fiber reinforced polycarbonate and evaluation of warpage through injection molding", Polymer(Korea), Vol. 38, pp. 708-713, 2014. DOI: http://dx.doi.org/10.7317/pk.2014.38.6.708
  2. M. Lee, H. Kim, M. Y. Lyu, "A study on the warpage of glass fiber reinfoced plastics for part design and operation condition: Part1. Amorphous plastics", Polymer(Korea), Vol. 36, pp. 555-563, 2012.
  3. M. Lee, H. Kim, M. Y. Lyu, "A study on the warpage of glass Fiber reinfoced plastics for part design and operation condition: Part2. Crystalline Plastics", Polymer(Korea), Vol. 36, pp. 677-684, 2012.
  4. X. Wang, G. Zhao, G. Wang, "Reserch on the reduction of sink mark and warpage of the molded part in rapid heat cycle molding process", Materials and Design, Vol. 47, pp. 779-792, 2013. DOI: http://dx.doi.org/10.1016/j.matdes.2012.12.047
  5. J. G. Kovacs, B. Siklo, "Investigation of cooling effect at coners in injection molding", International Communication in Heat and Mass Transfer, Vol. 38, pp. 1330-1334, 2011. DOI: http://dx.doi.org/10.1016/j.icheatmasstransfer.2011.08.007
  6. A. Agazzi, V. Sobotka, R. Le Goff, D. Garcia, Y. Jarny, "A methodology for the design of effective cooling system in injection moulding", Int J Mater Form, Vol. 3, pp. 13-16, 2010. DOI: http://dx.doi.org/10.1007/s12289-010-0695-2
  7. H. S. Park, N. H. Phan, "Design of conformal cooling channels for an automotive part", International Journal of Automotive Technology, Vol. 10, pp. 87-93, 2009. DOI: http://dx.doi.org/10.1007/s12239-009-0011-7
  8. H. S. Park, X. P. Dang, "Optimization of conformal cooling channels with array of baffles for plastics injection mold", Int. J. Precision Engineering and Manufacturing, Vol. 11, pp. 879-89, 2010. DOI: http://dx.doi.org/10.1007/s12541-010-0107-z
  9. J. Liu, Z. Lu, Y. Shi, W. Xu, J. Zhang, "Investigation into manufacturing injection mold via indirect selective laser sintering", Int J Adv Technol, Vol. 48, pp. 155-163, 2010. DOI: http://dx.doi.org/10.1007/s00170-009-2272-8
  10. X. Li, G. Zhao, Y. Guan, H Li, "Reserch on thermal stress, deformation, and fatigue lifetime of the rapid heating cycle injection mold", Int J Adv Manuf Technol, Vol. 45, pp. 261-275, 2009. DOI: http://dx.doi.org/10.1007/s00170-009-1969-z
  11. G. Zhao, G. Wang, Y. Guan, H. Li, "Reserch and application of a new rapid heat cycle molding with electric heating and coolant cooling to improve the surface quality of large LCD TV panels", Poly. Adv. Technol., Vol. 22, pp. 476-487, 2011. DOI: http://dx.doi.org/10.1002/pat.1536
  12. M. Lee, T. W. Kim, "A study on the heat sink with internal structure using peltier module in the natural and forced convection," Journal of the Korea Academia-Industrial cooperation Society, Vol. 15, pp. 4072-4080, 2014. https://doi.org/10.5762/KAIS.2014.15.7.4072
  13. W. H. Chen, C. Y. Liao, C. I. Hung, "A numerical study on the performance of miniature thermoelectric cooler affected by thomson effect", Appl. Energy, Vol. 89, pp. 464-473, 2012. DOI: http://dx.doi.org/10.1016/j.apenergy.2011.08.022
  14. K. H. Lee, O. J. Kim, "Analysis on the performance of the thermoelectric microcooler", Int. J. Heat Mass Transfer, Vol. 50, pp. 1982-1992, 2007. DOI: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2006.09.037
  15. J. Luo, L. Chen, F. Sun, C. Wu, "Optimum allocation of heat transfer surface area for cooling load and COP optimization of a thermoelectric refrigerator", Energy Convers Manage, Vol. 44, pp. 3197-3206, 2003. DOI: http://dx.doi.org/10.1016/S0196-8904(03)00107-9
  16. M. Lee, T. W. Kim, "A study on the heat sink with internal structure using peltier module in the forced convection," Journal of the Korea Academia-Industrial cooperation Society, Vol. 15, pp. 3410-3415, 2014. https://doi.org/10.5762/KAIS.2014.15.6.3410