M. Tahir OKTAÇ, Mustafa TİMUR, Halil KILIÇ

Impact of Dehumidification Devices on Production Efficiency in Plastic Injection

One of the many methods used in the production of plastic materials is plastic injection method.The plastic injection method needs equipment difficult to choose, and it is also costly. Manynegativities could be experienced during production. One of them is the water droplet problemson the surfaces of the mold. Provision of insufficient cooling on molds, ambient temperature,non-homogenous humidity, mechanical and other stresses occurring during production, crackson the product, warpage and thermal residual all cause some stress-like defects. In this study,the effect of water droplets problem on production efficiency in the molds of PolyethyleneTerephthalate (PET) raw materials manufactured in a private enterprise was examined. Thepercentage productivity table has been created based on different months of the year, AugustJuly and August. In the enterprise, 8 dehumidifiers were placed to 17 injection machines tocreate a homogeneous production temperature in the environment. Humidity and heat valuesobtained during production were monitored daily and recorded. In this study, which wasconducted over two years and three months, positive results were obtained suggesting that thewater droplets formed in injection molds has decreased with the effect of dehumidificationdevices, and the efficiency of injection production has also increased by 8%.

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[1] D. V. Rosato, D. V. Rosato, and M.G. Rosato, “Injection Moulding Machines, In: Injection Moulding,” Handbook. Boston, MA, pp. 28-150, 2000.

[2] D. Kozjek, R. Vrabič, D. Kralj, P. Butala, and N. Lavrač, “Data mining for fault diagnostics: A case for plastic injection moulding,” In Procedia CIRP, vol. 81, pp. 809-814, 2019.

[3] Y.F. Sun, K.S. Lee, and A.Y.C. Nee, “Design and FEM analysis of the milled groove insert method for cooling of plastic injection moulds,” The International Journal of Advanced Manufacturing Technology, vol. 24, no. 9-10, pp. 715-726, 2004.

[4] S.H. Tang, Y.M. Kong, S.M. Sapuan, R. Samin, and S. Sulaiman, “Design and thermal analysis of plastic injection mould,” Journal of Materials Processing Technology, vol. 171 no. 2, pp. 259-267, 2006.

[5] K.M. Au, and K.M. Yu, “A scaffolding architecture for conformal cooling design in rapid plastic injection moulding,” The International Journal of Advanced Manufacturing Technology, vol. 34, no. 5- 6, pp. 496-515, 2007.

[6] M.W. Fu, J.Y.H. Fuh, and A.Y.C. Nee, “Undercut feature recognition in an injection mould design system,” ComputerAided Design, vol. 31, no. 12, pp. 777-790, 1999.

[7] L.Q. Tang, C. Chassapis, and S. Manoochehri, “Optimal cooling system design for multi-cavity injection moulding,” Finite Elements in Analysis and Design, vol. 26, no. 3, pp. 229-251, 1997.

[8] A. Pesaran, T. Penney, A.W. Czanderna, “Desiccant cooling: state of the art Assessment”, National Renewable Energy Laboratory, pp. 1-12, 1992.

[9] B.R. Hughes, H.N Chaudhry, S.A. Ghani, “A review of sustainable cooling technologies in buildings,” Renewable and Sustainable Energy Reviews, vol. 15, no. 6, pp. 3112-3120, 2011.

[10] M. Sultan, I.I. El-Sharkawy, T. Miyazaki, B. B Saha, S. Koyama, d “An overview of solid desiccant dehumidification and air conditioning systems,” Renewable and Sustainable Energy Reviews, vol. 46, pp. 16-29, 2015.

[11] H.S. Park, and X.P. Dang, “Development of a smart plastic injection mould with conformal cooling channels” Procedia Manufacturing, vol. 10, pp. 48-59, 2017.

[12] J.M. Mercado-Colmenero, M.A. RubioParamio, J. J. Marquez-Sevillano, and C. Martin-Doñate, “A new method for the automated design of cooling systems in injection moulds,” Computer-Aided Design, vol. 104, pp. 60-86, 2018.

[13] J.C. Lin, “Optimum cooling system design of a free-form injection mould using an abductive network,” Journal of Materials Processing Technology, vol. 120, no. 1-3, pp. 226-236, 2002.

[14] H. Zhou, and D. Li, “Mould cooling simulation of the pressing process in TV panel production,” Simulation Modelling Practice and Theory, vol. 13, no. 3, pp. 273- 285, 2005.

[15] Plaş Plastic Package Industry and Trade Inc. Manufacturing Notes, 2018.