Optimization Of Flexural Strength For ABS Plastic Via Optimal Processing Parameters Using Taguchi Method

Chong, Shiau Ling (2017) Optimization Of Flexural Strength For ABS Plastic Via Optimal Processing Parameters Using Taguchi Method. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Flexural strength plays an important role in many areas and it is a great important factor in the evaluation of plastic product performance because it has significant impact on the mechanical property.The main goal of this project is to find out the most significant factor and optimum parameters condition for flexural strength of ABS plastic in injection molding process.Taguchi method and analysis of variance (ANOVA) help to select or to determine the optimum molding conditions under this experiments evaluation.The orthogonal array,signal-to-noise ratio (S/N ratio),and ANOVA were employed to study the performance characteristics in molding operations of ABS.In this study,the Taguchi method was used to study the effects of different molding parameters of the process which are injection pressure,holding pressure, injection speed and holding time.The S/N ratio for larger-the-better was considered to determine for flexural strength because it needs to be maximized.16 trials were conducted at different molding process conditions by using Zhafir injection molding machine.The flexural strength of the specimens were measured by using universal testing machine (INSTRON).This study is important to plastic manufacturing industry company in the selection of optimum combinations of molding process parameters for obtaining the high flexural strength in ABS plastic product.The result was shown that injection speed was given the highest influence of flexural strength.Experimental results were provided to illustrate the effectiveness of this study and reveal that the most significant molding process parameter for flexural strength is injection speed followed by injection pressure,holding pressure and holding time.The optimum process parameters in this study are 110 Mpa injection pressure,15.0 Mpa holding pressure,130 mm/s injection speed and 14 s holding time.

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