Principle of energy storage welding. The high-frequency current of 100KHZ generated by the vibration source controlled by microcomputer is amplified and shaped to push the power module to output to the induction head. When the metal aluminum foil in the container cover is close to the induction head, eddy current generates heat on the aluminum foil, and the degree of heat generation is determined by the strength of eddy current and the length of action time, so the working principle is the energy storage welding principle. The capping machine (sealing welding machine | parallel welding machine) is mainly used for sealing and welding the shell of optical devices, and is suitable for mass production of various welding processes from spherical or aspherical lenses to tube caps.