For plastic products that need large welding volume and area, and need to output ultrasonic energy in a large range in a short time, matching high-power ultrasonic transducer is essential. Good transducer can withstand the enormous energy brought by ultrasonic plastic welding, effective transportation and finally realize effective ultrasonic welding.
Structural design of ultrasonic transducer;
1. The outer prestressed sleeve is used instead of the conventional central prestressing head screw structure.
2. A sufficiently large uniform prestress can be applied to the oscillator wafer;
3. Different pressure levels were applied steadily to the PZT by a platform press, and the relation curve between the pressure and the amount of electricity in the stack was measured.
4. When tightening the outer prestressed sleeve, the amount of prestress can be controlled by monitoring the electric quantity, which has a great influence on the development quality of the transducer.
Excellent heat dissipation layout design;
1. Structure with thick copper electrode sheet and compressed air;
2. Obtain good heat dissipation conditions:
3. Through reasonable appearance design, vent design to form effective cooling, avoid energy output offset, prolong the service time of plastic welder.
Large amplitude stable output;
1. With the rear chip, the electrical and acoustic feedback is formed, and the characteristics of harmonic frequency tracking and large amplitude stable output are obtained.
2. Large amplitude, the ultrasonic plastic welding machine equipment itself destructive, wear consumption cost.
3. Through process treatment and raw material upgrade to further improve the efficiency of ultrasonic system, stable welding quality.
Increase resonant frequency；
1. Adopt the sleeve mechanism of fine-tuning and lifting harmonic frequency;
2. Change sleeves of different lengths;
An extender is used as the front radiation head:
1. Because high power ultrasonic transducer often requires high power density, but short working time;
2. In addition to the choice of titanium and aluminum alloy material with good fatigue strength, the expansion device shape with small mechanical loss must also be selected, that is, the choice of exponential expansion device.
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Post time: Aug-15-2022