Effect of Injection Moulding Process Parameter on Tensile Strength Using Taguchi Method

The plastic industry plays very important role in the
economy of any country. It is generally among the leading share of
the economy of the country. Since metals and their alloys are very
rarely available on the earth. Therefore, to produce plastic products
and components, which finds application in many industrial as well
as household consumer products is beneficial. Since 50% plastic
products are manufactured by injection moulding process. For
production of better quality product, we have to control quality
characteristics and performance of the product. The process
parameters plays a significant role in production of plastic, hence the
control of process parameter is essential. In this paper the effect of
the parameters selection on injection moulding process has been
described. It is to define suitable parameters in producing plastic
product. Selecting the process parameter by trial and error is neither
desirable nor acceptable, as it is often tends to increase the cost and
time. Hence, optimization of processing parameter of injection
moulding process is essential. The experiments were designed with
Taguchi’s orthogonal array to achieve the result with least number of
experiments. Plastic material polypropylene is studied. Tensile
strength test of material is done on universal testing machine, which
is produced by injection moulding machine. By using Taguchi
technique with the help of MiniTab-14 software the best value of
injection pressure, melt temperature, packing pressure and packing
time is obtained. We found that process parameter packing pressure
contribute more in production of good tensile plastic product.

• Gurjeet Singh
• M. K. Pradhan
• Ajay Verma

• Injection moulding
• tensile strength
• Taguchi method
• poly-propylene.

[1] Tsai, K. M., Hsieh, C. Y., & Lo, W. C. (2009). A study of the effects of
process parameters for injection molding on surface quality of optical
lenses. journal of materials processing technology, 209(7), 3469-3477.
[2] Pareek, R., & Bhamniya, J. (2013). Optimization of Injection Moulding
Process using Taguchi and ANOVA. Journal of Scientific and
Engineering Research,4(1).
[3] Rathi, M. M., & Salunke, M. M. D. (2012, October). Analysis Of
Injection Moulding Process Parameters. In International Journal of
Engineering Research and Technology (Vol. 1, No. 8 (October-2012)).
ESRSA Publications.
[4] Rahimi, M., Esfahanian, M., &Moradi, M. (2014). Effect of
reprocessing on shrinkage and mechanical properties of ABS and
investigating the proper blend of virgin and recycled ABS in injection
molding. Journal of Materials Processing Technology, 214(11), 2359-
2365.
[5] Li, H., Guo, Z., & Li, D. (2007). Reducing the effects of weldlines on
appearance of plastic products by Taguchi experimental method. The
International Journal of Advanced Manufacturing Technology, 32(9-10),
927-931.
[6] Raos, P., &Stojsic, J. (2014). Influence of Injection Moulding
Parameters on Tensile Strength of Injection Moulded
Part. Manufacturing and Industrial Engineering, 13(3-4).
[7] Zhu, J., Chen, J. C., & Kirby, E. (2004). Tensile Strength and
Optimization of Injection Molding Processing Parameters Using the
Taguchi Method. The International Journal of Modern Engineering, 4
(2).
[8] Lin, Y. H., Deng, W. J., Huang, C. H., & Yang, Y. K. (2007).
Optimization of injection molding process for tensile and wear
properties of polypropylene components via Taguchi and design of
experiments method. Polymer-Plastics Technology and Engineering,
47(1), 96-105.
[9] Pal, R., Mukhopadhyay, S., & Das, D. (2012). Optimization of microinjection
molding process with respect to tensile properties of
polypropylene. Indian Journal of Fibre and Textile Research, 37(1), 11.
[10] Islam, A., Hansen, H. N., Esteves, N. M., & Rasmussen, T. T. (2013).
Effects of holding pressure and process temperatures on the mechanical
properties of moulded metallic parts. ANTEC 2013.
[11] Hashemi, S. (2008). Effect of temperature on tensile properties of
injection moulded short glass fibre and glass bead filled ABS hybrids.
Express Polym. Lett, 7, 474.
[12] A. Riaz Ahamed, A. K. Shaik Dawood, R. Karthikeyan (2013).
Designing and Optimizing the Parameters which affect the Molding
Process using Design of Experiment. Volume 1, Issue 2, October-
December 2013, pp.116-122.