Investigation of mechanical properties of plastic product for two plate family mould

Mohd Zin, Ameir Asyraff (2016) Investigation of mechanical properties of plastic product for two plate family mould. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Plastic products are widely used in our daily life due to their lightweight, low cost, and competitive desirable properties. Injection moulding is used in this project because it can produce four mechanical testing samples. In order to achieve desired properties, the parameters of injection moulding must be optimized. Therefore the main objective of this study is to find out the effect of injection moulding parameters on mechanical properties for two-plate family mould. This project is done by identifying the parameters of injection moulding such as mould temperature, melt temperature, injection time and cooling time. This project begins with creating orthogonal array of nine runs as experimental data by using Taguchi method. Then, the specimens are tested according to their mechanical testing which are tensile test, flexural test, hardness test and impact test. The data from each of mechanical testing are collected and analyzed further using Signal-To-Noise Ratio (S/N) to determine the optimum parameters for each response and Analysis of Variance (ANOVA) to see which parameters are the most significant to each response. It is found that the most significant parameter that affected tensile strength is melt temperature. For flexural strength, the most significant parameter affected is cooling time. Meanwhile, for hardness and impact, the most significant parameter affected is mould temperature. Thus, industrial practitioners and researchers can make choices which set of parameters are optimized in producing high mechanical properties of plastic products.

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