ultrasonic welding machine adopt 4 pillar with circle running . the bottom welding by ultrasonic system,welding area withoutwhite ,and beautiful. the ultrasonic bottom welding machine fordifferent diameter ,height ,and material.the welding can bewhat you like .the machine easy operation with high qualityproduct making .it is not only for PVC cylinder bottom weldingmachine ,it also for other material ultrasonic welding. Ultrasonic bottom welding machine application:PVC clearcylinder welding ,transparent tube bottom welding .thecylinder suitable for candy packages,gift .and gift boxesmaking .it is widely use plastic packages line.