Ultrasonic molds are designed for use with ultrasonic plastic welding machines, with the purpose of welding plastic products. Due to varying application scenarios and welding materials, the size of the welds can differ, and so do the specifications of the machines. Their output power ranges from manual welding.

Ultrasound has a strong directional property and its energy is easy to concentrate during propagation.
Ultrasound can propagate through various different media and can travel significant distances.
3. The interaction between ultrasound and the transmitting medium is moderate, making it easy to convey information about the state of the transmitting medium.

Ultrasonic waves are a form of wave that can act as a carrier or medium for detection and information loading (such as in B-ultrasound for diagnosis); at the same time, they are a form of energy. When their intensity exceeds a certain threshold, they can affect, alter, and even destroy the state, nature, and structure of the medium through which they propagate by interacting with it.