Ultrasonic welding is an industrial technique whereby high-frequency ultrasonic acoustic vibrations are locally applied to work-pieces being held together under pressure to create a solid-state weld. It is commonly used for plastics, and especially for joining dissimilar materials. In ultrasonic welding, there are no connective bolts, nails, soldering materials, or adhesives necessary to bind the materials together.
This the process of joining plastics like ABS, PP, PVC, HIPS etc. Welding will take place only if two similar plastics are welded. Due to ultrasonic waves, the horn gets heated up and fuses the materials and forms the weld joint. Ultrasonic waves are sent to the horn through crystals in the connector and transmitted to booster. Non-woven cloth is also welded to different plastic materials due to the plastic content in non-woven cloth.