In ultrasonic welding, energy is delivered to the joint area in the form of high-power ultrasound. This type of welding is used to build assemblies that are too small, complex, or delicate for more common welding techniques.
It is also used to weld plastics, especially for joining dissimilar types.
For joining complex injection molded parts, ultrasonic welding requires expensive custom equipment specially designed for the parts being welded. The parts are sandwiched between shaped mandrel and the horn. One of the plastic parts has a spiked energy director which contacts the second plastic part. The ultrasonic energy melts the point contact between and the parts and they are joined. This process replaces a glued joint.
External link
http://www.staplaultrasonics.com/book.htm Ultrasonic welding book
Category:Welding
An ultrasonic bath is a method used for mixing liquid chemicals. A flask or test tube is partially immersed in a small tub of water. Ultrasonic vibrations are then sent through the water, and ice may be added to keep the apparatus from overheating. If everything has been set up properly, the chemicals are gradually mixed by the ultrasonic vibrations to form a colloid.
