... save time.(6) suitable for very large plastic welding.Principle of Ultrasonic Plastic Welders: Ultrasonic plastic welders operate by inducing ultrasonic ... packaging industry, toy industry and so on.Such as plastic body parts, car doors, car dashboard,lights,mirrors, ... loops,ink cartridges, toner cartridges.Medical Daily: watches, kitchen utensils, oral liquid bottle, drip caps, mobile phone ...