TWI Industrial Member Report Summary 445/1992
By M G Murch
Linear vibration welding is suited to the joining of large parts and has many applications in the domestic appliance market and automotive industry. A recent innovation of a dual pressure control, available on some modern commercial vibration welders, has the potential to improve further the quality of welded components, while reducing the weld completion time.
This report describes a preliminary study of dual stage pressure control, applied to the welding of three injection moulded thermoplastic materials: polypropylene (PP), high impact polystyrene (HIPS) and polyphenylene oxide (PPO). The influence on welding time, joint strength and material displacement, of a dual stage pressure control has been compared with the conventional single pressure operating system.