High-frequency welding operates on the principle where a self-oscillating electron tube circuit generates a high-frequency electromagnetic field. The material to be processed is placed between upper and lower electrodes, which apply both pressure and the high-frequency field. This excites the material’s internal molecules, causing them to vibrate rapidly and generate heat through friction. Under continued pressure, the material melts and fuses, enabling precise welding or embossing according to the mold’s shape.