When the ultrasonic plastic welding machine sends an overload alarm, the following steps should be taken to check the objection:
1. Sometimes there is a situation where the no-load test is normal, but it cannot work normally. It may be that the internal part of the acoustic energy such as the welding head changes, resulting in poor sound energy transmission. Here is a relatively simple judgment method: hand touch method. The working head or horn has a very uniform amplitude when working on the surface, and the hand feels velvety smooth. When the sound energy is not transmitted smoothly, there is a feeling of bubbles or burrs when touched by hand. Exclusion methods are used to eliminate problematic parts. The same situation can occur when the generator is not normal, because normally the transducer input waveform should be a smooth sine wave, which can also occur when there are spikes or abnormal waveforms on the sine wave. At this time, another pruning acoustic energy element can be substituted for discrimination.
2. Ultrasonic no-load test, if the working current is normal, it may be that the ultrasonic welding head is in contact with the object that should not be contacted or the parameter adjustment between the ultrasonic welding head and the welding seat is faulty.
3. When the ultrasonic no-load test is not normal, first observe whether the ultrasonic mold has cracks, whether the installation is firm, then remove the welding head and then carry out the no-load test to eliminate whether there is a problem with the transducer + horn, step by step. exclude. After eliminating the possibility of failure of the transducer + horn, replace the new horn to determine.
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