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

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Reproducibility Prediction of Surface Roughness in Mold and Injected Parts through Polycarbonate Injection Molding

폴리카보네이트 사출성형에 따른 금형과 사출품에서 표면거칠기의 재현성 예측

  • Received : 2017.05.09
  • Accepted : 2017.06.12
  • Published : 2017.06.30
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Abstract

In this study, we evaluated the surface roughness of mold and injected parts manufactured by polycarbonate (PC) injection molding. The mold surface was polished to produce six differentiated roughnesses with 12 areas using stones (#800, #1200), sandpapers (#800, #1200), and diamond compounds (#8000, #14000). Injected parts were created using 20mm/s injection speed, 80 bar holding pressure for 5 seconds, and $70^{\circ}C$ cooling water. Injected parts surface roughness (Sa) was measured randomly in 10 of 30 using an interferometer (NewView8000, zygo, USA). In the same way, mold surface was measured randomly 10 times on 12 polished areas. Surface roughness of molds and injected parts were compared, and a regression equation to predict mold surface roughness was proposed for specific injection molding parameters.

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References

  1. Choi, G. G., Cho, J. U., "Convergence Study due to the Configuration of Radiant Heat Panel of Automotive LED Heat Lamp," J. of KCS Vol. 8. No. 3, pp. 199-204, 2017.
  2. Kang, M. G., Her, I. S., Yu, Y. M., and Choi, H. L., "A Study on the 150W High-power Flood LED Lighting Engine using Heat Spreader," J. of KIIEE, Vol. 31, No. 1, pp. 26-34, 2017.
  3. Jeong, J. Y., Kang, M. G., Kim, S. J., and Yu, Y. M., "Design and Characterization of LED Engine Module for the Application of Thermoelectric Device," J. of KIIEE, Vol. 30, No. 7, pp. 32-40, 2016.
  4. Heng Wu, Xianmin Zhang, Peng Ge, "Modular design of a high-efficiency LED headlamp system based on freeform reflectors." Optics & Laser Technology, Volume 72, , pp. 79-85, 2015. https://doi.org/10.1016/j.optlastec.2015.03.021
  5. Kang, S. H., Oh, Y. S., and Lee, H. W., "Frictional sensitivity and effect of surface roughness in boss and rib test," Tribology International, Vol. 112, pp. 108-116, 2017 https://doi.org/10.1016/j.triboint.2017.04.003
  6. Woo, S. W., and Park, S. H., "Effects of Packing Pressure and Time on Injection Molding of Plastic Micro-channel Plates," J. of KSMPE, Vol. 25, No. 3, pp. 224-229, 2016.
  7. Saladino M. L., Armetta, F., Sibeko, M. A., Luyt, S. A., Martino, D. F. C., and Caponetti, E., "Preparation and characterisation of Ce:YAG -polycarbonate composites for white LED," Journal of Alloys and Compounds, Vol. 664, pp. 726-731, 2016. https://doi.org/10.1016/j.jallcom.2016.01.009
  8. Woo, J. W., Hong, J. S., Kim, H. K., and Lyu, M. Y., "Analysis of Residual Stress and Birefringence in a Transparent Injection Molded Article for Molding Condition," Polymer(Korea), Vol. 40, No. 2, pp. 175-180, 2016.
  9. "Knowledge Roughness (3D) parameter,"(2017) http://www.olympus-ims.com/ko/knowledge/metrology/roughness/3d_parameter/(accessed 3, May., 2017)
  10. Wu, T., Hui, Y., Yan, Z., Li, Z., and Li, Q., "Zygo interferometer for the precious measurement of tiny refractive index change of two laser crystals," Optics & Laser Technology, Vol. 89, pp. 196-199, 2017. https://doi.org/10.1016/j.optlastec.2016.09.034
  11. Kwon, D. K., and Wang, D. H., "A Statistical Study on the Blasting Conditions when Micro Blasting for Rotating Aluminum Rod," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 16, No. 2, pp. 135-141, 2017. https://doi.org/10.14775/ksmpe.2017.16.2.0135
  12. Ratnam, Ch., Arun Vikram, K., Ben, B. S., and Murthy, B. S. N., "Process monitoring and effects of process parameters on responses in turn-milling operations based on SN ratio and ANOVA," Measurement, Vol. 94, pp. 221-232, 2016. https://doi.org/10.1016/j.measurement.2016.07.090
  13. Bae, M. I., and Rhie, Y. S., "Regression Equation Deduction for Cutting Force Prediction during Interrupted Cutting of Carbon Steel for Machine Structure (SM45C)," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 15, No. 4, pp. 40-45, 2016. https://doi.org/10.14775/ksmpe.2016.15.4.040
  14. Ohtani, H., Ellwood, K., Pereira, G., Chinen, T., et al., "Extensional Rheology: New Dimension of Characterizing Automotive Fluids," SAE Technical, Vol. 01 No. 0364 pp. 4271-4281, 2017.