| USS (ultrasonic welding) was originally developed for joining thermoplastic mouldings. The plastic material is plasticized very rapidly through friction between the mating surface and vibration absorption of the parts to be combined. This is then followed by the actual joining process. The required energy is produced by the ultrasonic generator in the form of an AC voltage which is converted into mechanical vibration (20 – 40 kHz) and then applied to the parts by a vibrator (sonotrode). The molten material is displaced into recesses and undercuts as the threaded inserts (metal parts size M2 – M6) are installed in the thermoplastic.
Suitable Böllhoff threaded inserts: HITSERT® 2, HITSERT® 3 and SONICSERT® |
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Insertion tools
| Equipment types | Range of sizes | Economic batch size |
| Hand-operated ultrasonic welding gun | M2 - M6 | <= 5.000 |
| Semi-automatic ultrasonic welding machine | M2 - M8 | <= 50.000 |
| Ultrasonic welding components | M2 - M8 | > 10.000 |
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Possible:
Recommended: | M2 - M6 for metal inserts
M2 - M12 specially plastic in plastic-inserts |
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 High noise levels when fitting metal inserts
 Considerable abrasion when fitting metal inserts
 Unsuitable for threaded bolts
 Can easily be converted to other insert sizes |
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 Thermoplastics |
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