Generally speaking, the shape design of welding head is determined by the processing area. Design habits are based on simple geometry and easy processing and molding; In addition, taking the characteristics of the ultrasonic welding head geometry as the criterion, such as "gain ratio" (i.e. amplitude amplification ratio) is the main consideration in the design, the conical ultrasonic welding head has the smallest gain in the gain ultrasonic welding head geometry, and the trapezoidal horn has the largest gain in the gain welding head geometry. Considering the service life and impact resistance of ultrasonic die, the conical horn is the best in the geometry of gain welding head, while the trapezoidal ultrasonic welding head is the one with the greatest risk of life and impact resistance design in the geometry of gain welding head.

In principle, the design model of ultrasonic welding head adopts the "cone type" of hourly processing area, the "ladder type" when the processing area is large, and the "index type" and "suspension index type" of processing area are used in the middle; In fact, we will also design mixed ultrasonic molds, such as stepped exponential type, stepped cone type or stepped welding head with increased pressure area; When processing special requirements, ultrasonic welding head with special geometry will also be designed.