Ultrasonic weld, including ultrasonic plastic welding & metal, means applied a ultrasonic generator which is as a power supply of ultrasonic system to convert supplied electric in low frequency, such as 220V or 380V, to the ultrasonic frequency, normally 15KHz to 70KHz, and supplies to ultrasonic transducer which also called as converter, by which the electrical energy is transfer into mechanism oscillation energy to work on work-pieces and case the internal oscillation and friction between molecules of material to generate heat and melt material, by which the molten material at the contacting area infiltrate into each other and stick together to form welding.