Description

Ultrasonic welding

Thermoplastics are a welding method in which two plastics are welded together due to the friction and heat generated by the surface molecules under the action of ultrasonic vibration.
Note for welding of thermoplastics:
A. The tongue and tongue design ensures convenient alignment during the welding cycle.
B. The welding wire is designed to be slender, but there must be enough meltable material to fuse the welding surface. The specific design method depends on what kind of workpiece equipment is used for welding. Welding pressure, vibration amplitude and other parameters are adjustable to ensure that the welding head can contact the welding surface and apply pressure. The lower workpiece is the pressure-receiving part and is placed in the bottom mold without moving. The welding head produces high-frequency ultrasonic waves, which makes the upper workpiece heat and vibrate, so that it can fuse with the lower workpiece. After the welding head stops vibrating, the pressure is maintained to cool the melting position. The entire welding time is mostly less than one second.

Samples of ultrasonic plastic welding