Publish Time: 2022-06-06 Origin: Site
The minimum frequency required in ultrasonic welding is 15000 Hz.
While ultrasonic welding is flexible and effective for most materials, it does not work well with particular thermoplastics. If you intend to use high moisture content thermoplastics, ultrasound welding becomes ineffective. The technique is also not applicable in welding hard and strong thermoplastics such as polypropylene.
Though the technique is useful in a wide scope of metals, it cannot handle products with joints larger than 320 mm since the transducer’s output ranges between 10-320 mm. Welding thicker materials such as polypropylene also pose a challenge as they require a lot of energy to break the molecular bonds.
When welding using the ultrasonic method, the upper sections connected by the sonotrode usually vibrate. Having any other electronic components mechanically fastened to the vibrating parts will alter the vibration pattern damaging the welds. The damage is likely to occur in high-stress concentration areas such as small cross-sectional areas or the ones with sharp corners. To solve this problem easily, isolate the electrical components from the upper part of the assembly’s vibrating parts
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