Investigation of Mechanical and Dimensional Features in Unfilled Polyketone Polymer

Abstract

High performance engineering polymers are widely used in automotive sector today. For this reason, the mechanical and dimensional of one of these polymer materials after injection molding under different process conditions (melt temperature, injection pressure and gate type) will be investigated. In order to examine the mentioned properties of these polymers, a series of plastic injection experiments were carried out based on the Taguchi Experimental design (L9). In the experiments, tensile strength, percentage elongation and shrinkage values were obtained by using the parameters of mold temperature, injection pressure and type runner gate. At the end of the study, time and cost savings were achieved by performing the least number of experiments according to the Taguchi experimental design. In addition, the problems encountered in the use of polymer materials in the literature and industry have been tried to be removed. Moreover, some solutions will be provided on mechanical and the quality problems in plastic injection molding

Keywords

• Polymers
• Plastic injection molding
• Mechanical properties
• Dimensional properties
• Taguchi design

References

1. Akyüz, Ö.F. (2006). Introduction of plastics and plastic technologies, (3rd ed.), PAGEV Publications, İstanbul.
2. Akkurt, S. (2007). Plasctic material science and mold design, Birsen Publications, (1st ed.), İstanbul.
3. Arıcıoğlu, M.K., Mert, B., & Soydan, Y. (2000). Mechanical analysis methods of Polymer materials, Journal of Sakarya University Natural Sciences, 1,2, 51-58.
4. ASTM D-638 Standards (2010). Standard test method for tensile properties of plastics, ASTM International, USA.
5. ASTM D-1238, (2001). Standart test method for melt flow rates of thermoplastics by extrusion plastomer, Annual Book of ASTM Standart, 8(1), 265-276.
6. Beaumont, J.P., Nagel, R., & Sherman, R. (2002). Successful injection molding: Hanser/Gardner Publications Inc., Cincinati, USA.
7. Campo, A. (2008). Selection of polymeric materials, William Andrew Publishing, Norwich, USA.
8. Çakır, Y., Özdemir, A., & Güldaş, A. (2001). Investigation of injection parameters affecting shrinkage amount in plastic products. Journal of Technology, 1-2, 19-29.

9. Demirer, A., Soydan, Y. & Kaptı, A.O. (2007). An experimental investigation of the effects of hot runner system on injection moulding process in comparison with conventional runner system. Materials & Design, 28, 1467-1476.
10. Ezdeşir, A., Erbay, E., Taşkıran, İ., Yağcı, M.A., Cöbek, M., & Bilgiç, T. (2006). Polimerler 1(3rd ed.), PAGEV Publications, İstanbul.
11. Güllü, A., Özdemir, E., Demir, H. (2001). Investigation of the effect of injection parameters on the mechanical properties of glass fiber reinforced Polypropylene (PP) and Nylon 6 (PA6) composites. Journal of Niğde University Engineering Sciences, 5(1), 11-19.
12. Iyer, N. & Ramani, K. (2002). A study of localized shrinkage in injection molding with high thermal conductivity molds. Journal of Injection Moulding Technology, 6(2), 73-90.
13. Jansen, K.M.B., Van Dijk D.J. & Husselman M.H. (1998). Effect of processing conditions on shrinkage in injection molding, Polymer Engineering Science, 38(5), 838-846.
14. Kurt, M. (2011). High-temperature tribological behavior of high-performance engineered polymers, Master Thesis, Sakarya University Natural Science Institute, Sakarya.
15. Kuo, H.C., & Jeng, M.C. (2010). Effects of part geometry and injection molding conditions on the tensile properties of ultra-high molecular weight polyethylene polymer. Material & Design, 31, 884-893.
16. Liao, S.J., Chang, D., Chen, H.J., Tsou, L.S., Ho, J.R., & Yau, H.T. (2004). Optimal process conditions of shrinkage and warpage of thin wall parts. Polymer Engineering Science, 44, 917-928.
17. Mehat, N.M. & Kamaruddin, S. (2011). Optimization of mechanical properties of recycled plastic products via optimal processing parameters using the taguchi method, J. Materials Processing Technology, 211, 1989-1994.
18. Minitab Statistical Software, Release 16, (2007). Making data analysis easier, State College, Minitab Corperation, USA.
19. Öktem, H. & Erzincanlı, F. (2012). Determination of optimal process parameters affecting shrinkage caused by plastic injection pressing of a DVD ROM front cover by taguchi method, III. National Design Manufacturing Analysis Conference, Türkiye.
20. Öktem, H., Erzurumlu, T., & Uzman, İ. (2007). Application of taguchi optimization technique in determining plastic injection molding process parameters for a thin-shell part. Materials & Design, 28, 4, 1271-1278.
21. Öztürk, T., & Özkan, A. (2015). Comparison of runner systems of cold and hot, Journal of Düzce University Science and Technology, 3, 283-298.