... *H2500mmWeight: 300kgCar Door Riveting Welding Equipment Welding time: 50-120S/PCSApplication: Car door, hood, instrument platform and ... 6) suitable for very large plastic welding.Principle of Ultrasonic Plastic Welders: Ultrasonic plastic welders operate by inducing ultrasonic frequencies ... packaging industry, toy industry and so on.Such as plastic body parts, car doors, car dashboard,lights,mirrors ...