What is the working principle of the ultrasonic sealing machine
Ultrasonic sealing machine (English note: closing ultrasonic machine) is a kind of ultrasonic plastic welding machine that uses an ultrasonic concentrator to act on the sealing part of the packaging container to seal the packaging container. The ultrasonic energy is transmitted to the weld zone through the upper weldment. Because the weld zone, that is, the interface between the two welds, has large acoustic resistance, local high temperature will be generated. In addition, due to the poor thermal conductivity of the plastic, it could not be distributed in time for a while, and gathered in the welding area, which caused the contact surface of the two plastics to melt rapidly, and after a certain pressure, they merged into one. When the ultrasonic stops, let the pressure continue for a few seconds to make it solidify and shape, thus forming a strong molecular chain, achieving the purpose of welding. The welding strength can be close to the strength of the raw material, which is suitable for packaging of plastic containers.