The principle of ultrasonic degate and trim machine uses ultrasonic high-frequency vibration, which can quickly remove excess plastic nozzle material and separate plastic products. Nozzle refers to the connecting material between the parts formed during the injection molding process of plastic parts. It is also called "tangkou" (pouring sprue). It refers to the inlet and outlet of the flow of hot liquid material. Usually, in the injection molding process, the nozzle cannot be cleaned and cut clean. Therefore, nozzle cutting devices are required to re-cut or polish injection molded parts. After injection molding of plastic products, it takes time and effort to cut off unnecessary nozzles. Using the ultrasonic cutting nozzle technology, the nozzles of plastic products can be separated quickly, which greatly improves the production efficiency, instantly eliminates dozens of products, and has extremely high efficiency. The structure of the ultrasonic cutting nozzle is composed of pneumatic machinery, control system, ultrasonic generator, transducer, ultrasonic welding head and fixture. There are two types of ultrasonic cutting nozzles, one is vertical, similar to the structure of the welding head that moves up and down, the other is horizontal, contact structure, does not need too much pressure; the horizontal structure is convenient for the injection molding machine The manipulator cooperates to realize automatic operation.