... , low nonconformities. Company information:(pvc pipe ultrasonic welding machine)Zhuhai LK-Automatic Technology Co., Ltd. was founded ... the pvc pipe ultrasonic welding machine Plastic Guardrail tube sealing machine, LED guardrail tube welding machine, parapet light welding equipment, ... , the work piece under the pressure of certain cooling shapes, reach perfect welding. Principle of Ultrasonic Welding ...