/community-hubs/welding-assembly-cleaning/b/welding-assembly-cleaning-blog/posts/tips-for-effective-ultrasonic-plastic-weldingUltrasonic welding is: …an industrial technique whereby high-frequency ultrasonic acoustic  vibrations are locally applied to workpieces being held together under pressure to create a solid-state weld . It is commonly used for plastics , and especiallyen-USTelligent Community 13