At present, the demand for masks is increasing, what is the role of ultrasonic welding system in the manufacturing process of masks? That is the application of ultrasonic welding technology. We can see some indentation on the mask, such as the ear look, the mask sealing edge, and the N95 mask exhalation valve, which are all using ultrasonic mask welding technology.
Ultrasonic Welding principle:
Ultrasonic welding convert 50 or 60 hz current into 15, 20, 30 or 40 khz electrical energy through ultrasonic generators, transducers and piezoelectric transducers. The converted high frequency electrical energy is converted by a transducer into mechanical motion of the same frequency, Then the mechanical motion is transmitted to the welding horn through a set of adjustable amplitudes. The welding horn transmits the received vibration energy to the joint of the workpiece to be welded, where the vibration energy is converted into heat energy by friction to melt the plastic. Ultrasonic waves can be used not only to weld hard thermoplastics, but also to process fabrics and films.
The following is the common application of ultrasound in masks.
The ultrasonic welding application in mask machine
The use of high frequency friction between the contact surface so that the rapid generation of heat among molecules. under a certain pressure, two parts like the fabric can be fused together. That is the principle of ultrasonic mask welding machine. Usually the frequency used for non-woven welding processing are 20KHz and 15KHz. It is generally necessary to make tooth, mesh and strip lines on the welding horn, to form a pattern on the surface of the fused product, and to fuse the multi-layer cloth.
The ultrasonic mask welding system application in automation
Ultrasonic welding system is generally used in automatic equipment and match the automatic production line to complete continuous welding. The ultrasonic mask welding system generally includes: ultrasonic generator, ultrasonic transducer, ultrasonic welding mold (welding horn), and related accessories, such as fixed support transducer flange, connecting cable, etc. When the system works, there is an external switch signal trigger the system, the system complete a welding process according to the preset time, the program control circuit is provided with delay time, welding time, holding time. The whole set complete complete the masks welding.
Post time: Apr-14-2022