The effects of injection moulding processing parameters and mouldgate size towards weld line strength

摘要

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-mouldedproducts. In this study, numerical simulation (Cadmould) was employed to investigate the influenceof gate sizes as well as the injection moulding parameters towards the occurrences of weld lines atAcrylonitrile Butadiene Styrene (ABS) specimens. This research begins from the simulation,fabrication of mould, practical injection process and tensile test. The double gates mould was usedto present the weld line defects. The result shows that the smaller gate size produces less weld linein plastic parts, which was verified through simulation process. The optimal parameter setting thatproduced good tensile strength specimens was also validated experimentally in this research.