Warpage Analysis of Different Number Cooling Channels for Dumbbell Plastic Part in Injection Moulding

Abstract:

Warpage deflection is one of the common pitfalls in plastic injection moulding which is always affected the quality and accuracy of the plastic products. It occurs due to the influences of mould temperature during injection moulding process and it is related to the number of cooling system existed in the mould. Therefore, this paper studies the effect of cooling channels on warpage of dumbbell plastic part having different number of cooling channel using Moldflow software. Warpage analysis was run using four and eight cooling channels. Parameters involved in this study are injection time, packing time, melt temperature and mould temperature. The result of warpage from simulation analysis was projected on the graphic having different colour which is presented the actual value of warpage. It is found from warpage simulation result that the maximum warpage for four cooling channels is 1.283mm and the maximum warpage for eight cooling channels is 1.280mm. It shows that the increasing of the number of cooling channel from four to eight channels in the injection mould reduces the warpage deflection about 0.2%. Thus, the result shows that the number of cooling system in the mould plays an important role on the quality of plastic part during injection moulding process.

• Periodical: Applied Mechanics and Materials (Volume 761)
• Pages: 8-11
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.761.8
• Online since: May 2015
• Authors: Mohd Amran, Siti Salmah, Raja Izamshah, Mohd Shahir, Mohd Amri, Effendi Mohamad, Mohd Sanusi, Sivaraos Sivaraos, Zolkarnain Marjom, Umar Al-Amani, Mohd Kamal Musa, Zulkeflee Abdullah
• Keywords: Cooling Channels, Injection Moulding, Moldflow Software, Warpage Analysis

References

[1] M. Amran, S. Salmah, M. Zaki, R. Izamshah, M. Hadzley, S. Subramoniam, M. Shahir, M. Amri, The effect of pressure on warpage of dumbbell plastic part in injection moulding machine, Appl. Mech. & Mater., 903 (2014) 61-66.

DOI: 10.4028/www.scientific.net/amr.903.61

[2] M. Suzuki, M.A.M. Ali, K. Okamoto, T. Taniike, M. Terano, M. Yamaguchi, Effect of stereoregularity of polypropylene on flow instability in capillary extrusion, Adv. Polym. Technol., 28 (2009) 185-191.

DOI: 10.1002/adv.20159

[3] M. A. Amran, M. Hadzley, S. Amri, R. Izamshah, A. Hassan, S. Samsi, K. Shahir, Optimization of gate, runner and sprue in two-plate family plastic injection mould, AIP Conf. Proc. (2010) 1217 (2010) 309.

DOI: 10.1063/1.3377834

[4] M.N.A. Rahman, N.K. Khamis, R.M. Zain, B.M. Deros, W.H.W. Mahmood, Implementation of 5S Practices in the Manufacturing Companies: A Case Study, Am. J. Appl. Sci., 7 (2010) 1182-1189.

[5] M. Kamalrudin, M.A. Ali, A. Abdullah, Framework of Computational System for the Injection Mould Cost Estimation, 37th International Conference on Computers and Industrial Engineering, pp.709-717, Oct (2007).

[6] J.Y. Fuh, M. Fu, A.Y. Nee, Computer-Aided Injection Mold Design and Manufacture, CRC Press, New York, (2004).

DOI: 10.1201/b16948

[7] O.A. Mohamed, S.H. Masood, A. Saifullah, A simulation study of conformal cooling channels in plastic injection molding, Int. J. Eng. Res. 2 (2013) 344-348.

[8] W. Xia, Flow and warpage simulation of mobile phone injection mold, Int. Symp. Instrum. Meas. Sens. Netw. Autom. (2012) 491-493.

[9] C. Wang, J. Zhu, Flow Analysis in Injection Molding Process based on MoldFlow, International Conference of Mechanic Automation and Control Engineering (MACE), pp.19-22, Jun (2010).

DOI: 10.1109/mace.2010.5536343

[10] J. Fischer, Handbook of Molded Part Shrinkage and Warpage, second ed., William Andrew, Oxford, (2013).