MultiCraft INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE AND TECHNOLOGY Minimization of sink mark defects in injection molding process Taguchi approach D
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MultiCraft INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE AND TECHNOLOGY Minimization of sink mark defects in injection molding process Taguchi approach D

Mathivanan M Nouby and R Vidhya Director of CAE Infotech Chennai600020 INDIA AUFRG Institute for CADCAM Anna University Chennai600025 INDIA Institute of Remote Sensing A nna University Chennai600025 INDIA Email mathvanyahoocom Mathivanan D Correspo

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MultiCraft INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE AND TECHNOLOGY Minimization of sink mark defects in injection molding process Taguchi approach D




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MultiCraft INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND TECHNOLOGY Minimization of sink mark defects in injection molding process Taguchi approach D. Mathivanan *, M. Nouby and R. Vidhya Director of CAE Infotech, Chennai-600020, INDIA AU/FRG Institute for CAD/CAM, Anna University, Chennai-600025, INDIA Institute of Remote Sensing, A nna University, Chennai-600025, INDIA E-mail: mathvan@yahoo.com (Mathivanan D.); *Corresponding author Abstract Keywords: 1. Introduction
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol.

2, No. 2, 2010, pp. 13-22 et.al et.al 2. Materials and methods 2.1. Design of simple, scalable and generic model and machine selection: 2.1.1 Molding material and machine:
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 2.1.2 Taguchi methodology: Table-1 Fi ure 1.
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 Injection Molding Process Control factors Controllable processing variables based on pressure, temperature, time etc Noise

factors - Fixed processing parameters, Mold parameters, ambient conditions, human factor etc. Output Quality, Quantity Figure 2 2.1.3 Experimental set-up:
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 Figure 3 2.2 Selection of processing variables and their levels: Table: 2 Levels Number Coded Parameters Uncoded Parameters Low (1) High (2) 3. Injection molding experiments 3.1 Initial screening Taguchi’s experiments, data collection and analysis:
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Mathivanan et al. / International Journal of

Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 MSD Table-3 Table -4 Level Melt temperature Mold Temperature Injection Time Packing Time Packing Pressure Rib-to- Wall ratio Rib Distance 3.2 Parameters selection for follow-up experiments: 3.3 Taguchi L27 follow-up experiments, data collection and analysis: Run A B C D E F G 1 2 3 4 5 6 7 8
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 Table – 5 Levels Number Coded Parameters Uncoded Parameters Low (1) Mid (2) High (3) Table -6 Experimental

Run Melt Temperature (A) Mold Temperature (B) Pack Time (D) Rib-to-wall Ratio (F) Rib Distance (G) Sink Depth In mm S/N ratio 4. Results and discussion
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 Figure 4. Table -7 Validation Run A B D F G S/N ratio Predicted Sink Depth Measured Sink Depth % Deviation 5. Conclusion 260 240 220 0.07 0.06 0.05 0.04 0.03 80 60 40 12 10 80 65 50 0.07 0.06 0.05 0.04 0.03 65 40 15 Melt Temperature Mean of Means Mold Temperature Pack Time Rib-to-Wall ratio Rib Distance
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 Nomenclature 3D ABS ANN ANOVA A B C CAD CAE D DOE E F FE FEA G mm MPa MSD N sec References Materials and Design Journal of Injection Molding Technology Journal of Injection Molding Technology International Journal of Engineering, Science and Technology Society of Plastics Engineers International Journal of Advanced Manufacturing Technology International Journal of Advanced Manufacturing Technology International Journal of Engineering, Science and Technology Journal of

Injection Molding Technology Quality Engineering Using Robust Design Taguchi Techniques for Quality Engineering Polymer -Plastics Technology and Engineering Journal of Injection Molding Technology Journal of Injection Molding Technology
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Mathivanan et al. / International Journal of Engineering, Science and Technology, Vol. 2, No. 2, 2010, pp. 13-22 Journal of Injection Molding Technology Biographical notes Dr. D. Mathivanan M. Nouby Dr. R. Vidhya