Abstract
Plastic moulded parts should have good mechanical properties and free from defects. Tensile behaviour of plastics plays an important role in defining the quality of injection-moulded products. In this study, numerical simulation (Cadmould) was employed to investigate the influence of gate sizes as well as the injection moulding parameters towards the occurrences of weld lines at Acrylonitrile Butadiene Styrene (ABS) specimens. This research begins from the simulation, fabrication of mould, practical injection process and tensile test. The double gates mould was used to present the weld line defects. The result shows that the smaller gate size produces less weld line in plastic parts, which was verified through simulation process. The optimal parameter setting that produced good tensile strength specimens was also validated experimentally in this research
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