The ultrasonic welding horn is the component in the welding process that ultimately delivers the ultrasonic energy to the workpiece. It connects with the workpiece and transmits ultrasonic vibration energy to it. The material of the ultrasonic horn is typically made of titanium alloy, aluminum alloy, or steel. Depending on operational requirements, the horn may undergo treatments such as high-carbon steel embedding, chrome plating, or anodizing. The manufacturing process of the horn requires precision. Common types of horns, distinguished by different characteristics, include: engraved forming horns, full-wavelength horns, composite horns, pressure plate-equipped horns, vacuum horns, and machined horns, among others.

In the principle of ultrasonic welding machines, the function of the anvil (or base mold) is to secure and support the workpiece during operation. The anvil must be accurately positioned, robust, and stable, as this directly impacts the welding process, influencing the final quality and efficiency of the workpiece.