Piezoelectric ultrasonic transducer CW20

direct-contactfor welding

Protective function of mask: Masks are generally divided into three layers, the outermost layer is non-woven cloth, used to block dust; In the middle is the filter material, can absorb particles to block part of the bacteria; The innermost layer is skin-friendly and non-woven, which is more skin-friendly. How is the mask so many layers is fixed, breathing valve and ear band is how to connect. In fact, the mask can be seen everywhere above the indentation, such as sealing edge, ear band, breathing valve are ultrasonic welding. Working principle: The ultrasonic generator converts the low frequency alternating current into the high frequency alternating current, and converts the electric energy into the mechanical energy of the high frequency vibration through the transducer. When the welding head ACTS on the contact surface of thermoplastic, it produces tens of thousands of high-frequency vibration per second. High-frequency vibration transmits ultrasonic energy to the welding area through the upper welding piece, and the upper and lower welding pieces in this area experience friction, resulting in local high temperature. After the ultrasonic action, the pressure lasts for a few seconds, making it solidify and set, forming a strong molecular chain, to achieve welding.