Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지
DOI QR코드

DOI QR Code

Improved Surface Characteristics of Automotive Interior Parts Fabricated by Injection Molding Method

사출법으로 제조된 자동차 내장부품의 표면특성 개선 연구

  • 최동혁 (동국실업 주식회사) ;
  • 황현태 (울산테크노파크 자동차부품기술연구소) ;
  • 손동일 (동국실업 주식회사) ;
  • 김대일 (울산대학교 첨단소재공학부)
  • Received : 2018.12.04
  • Accepted : 2019.01.16
  • Published : 2019.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

The environmental pollution which is global warming and abnormal climate is caused by increasing population and activated economics. To reduce environmental pollution, we have being efforts into reducing $CO_2$ emission and use of energy, resources. Especially, for the sake of light weight and fuel efficiency of automotive industry, many countries have defined the restrict environmental regulation which stipulate high magnitude of reducing $CO_2$ emission. In this study, we have predicted the problem of Mu-cell injection molding through the finite element analysis as a function of temperature controlled by Joule heating or in terms of mold temperature. From the result of finite element analysis, we have determined the optimized process and made the injection mold included electric current heating system with Mu-cell manufacturing. Lastly, we analyzed the surface characteristics of the injection products with mold temperature.

Keywords

PMGHBJ_2019_v52n1_43_f0001.png 이미지

Fig. 1. Developed product

PMGHBJ_2019_v52n1_43_f0002.png 이미지

Fig. 2. Process of injection molding by electronic heating

PMGHBJ_2019_v52n1_43_f0003.png 이미지

Fig. 3. Model of injection molding analysis

PMGHBJ_2019_v52n1_43_f0004.png 이미지

Fig. 4. Conditions of combined environmental test

PMGHBJ_2019_v52n1_43_f0005.png 이미지

Fig. 5. Position of microphone for measurement of the noise and vibration

PMGHBJ_2019_v52n1_43_f0006.png 이미지

Fig. 6. Comparison of simulation and experiment for analysis of cell distribution

PMGHBJ_2019_v52n1_43_f0007.png 이미지

Fig. 7. Comparison of simulation and experiment for analysis of surface characteristics.

PMGHBJ_2019_v52n1_43_f0008.png 이미지

Fig. 8. Cell size and Porosity by Mu-Cell method

PMGHBJ_2019_v52n1_43_f0009.png 이미지

Fig. 9. Surface roughness

PMGHBJ_2019_v52n1_43_f0010.png 이미지

Fig. 10. A combined environmental test setup

PMGHBJ_2019_v52n1_43_f0011.png 이미지

Fig. 11. Input frequency for vibration test

Table 1. Deformation after combined environmental test

PMGHBJ_2019_v52n1_43_t0001.png 이미지

Table 2. Amount of noise for vibration test

PMGHBJ_2019_v52n1_43_t0002.png 이미지

References

  1. D. H. Choi, H. T. Hwang, D. I. Son and D. I. Kim, A Study on Surface Improvement of Automotive Plastic Part by Injection Molding Analysis, J. Korean Inst. Surf. Eng. (2018) Fall conference 116.
  2. D. H. Choi, H. T. Hwang, D. I. Son and D. I. Kim, A Study on Surface Characteristics of Plastic Part with Mc-cell Process by Mold of Electronic Heating, J. Korean Inst. Surf. Eng. (2018) Fall conference 134.
  3. D. H. Choi, H. T. Hwang, D. I. Son and D. I. Kim, A Study of Surface Improvement for Automotive Part by Injection Mold of Electronic Heating, J. Korean Inst. Surf. Eng. 51 (2018) 40-46. https://doi.org/10.5695/JKISE.2018.51.1.40
  4. B. H. Kim and N. P. Suh, Low Thermal Inertia Molding, Polym Plast. Technol. Eng. 25 (1986) 73-93. https://doi.org/10.1080/03602558608070076
  5. K. M. B. Jansen and A. A. M. Flaman, Construction of Fast-response Heating Elements for Injection Molding Applications, Polym. Eng. Sci. 34 (1994) 894-897. https://doi.org/10.1002/pen.760341105
  6. D. Yao and B. Kim, Development of Rapid Heating and Cooling Systems for Injection Molding Applications, Polym. Eng. Sci. 42 (2002) 2471-2481. https://doi.org/10.1002/pen.11133
  7. D. Yao and B. Kim, Injection Molding High Aspect Ratio Microfeature, J. Injection Molding Tech. 6 (2002) 11-17.
  8. D. Klempner and K. C. Frisch, Handbook of Polymeric Foams and Foam Technology, Hanser, N.Y (1991).
  9. K. Yano, A. Uauki, A. Oakida, T. Kurauchi and O. Kamigaito, Synthesis and Properties of Polyimide-Clay Hybrid, J. Polym, Sci. Polym. Chem. 31 (1993) 2493. https://doi.org/10.1002/pola.1993.080311009
  10. A. Uauki, M. Kawasumi, Y. Kojima, Y. Fukushima, A. Oakda, T. Kurauchi and O. Kamigaito, Synthesis of Nylon6-Clay Hybrid, J. Mater. Res. 8 (1993) 1179. https://doi.org/10.1557/JMR.1993.1179
  11. J. Y. Chung and D. H. Kim, Development of Simulation Method for Heating Line Optimization of E-Mold by using Commercial CAE Softwares, J. Academia-Industrial Tech. 9 (2008) 1754-1759.
  12. S. L. Kang, Bubble Nucleation and Macroscopic Growth in Polymer Solutions, Chung-Ang University Graduation School Ph.D. Dissertation, (2005) 3-9.
  13. Y. C. Lee, The Improvement of Weldline and Flow mark Defection by using Injection Molding Analysis, J. Korean Soc. Precis. Eng. 30 (2013) 1295-1301. https://doi.org/10.7736/KSPE.2013.30.12.1295