generator ultrasonic welding 15khz/20khz

When the ultrasonic wave acts on the thermoplastic plastic contact surface, it will produce tens of thousands of high-frequency vibration per second. This kind of high-frequency vibration reaches a certain amplitude. The ultrasonic energy is transmitted to the welding area through the upper welding piece. Because the acoustic resistance is large at the interface of the two welding, local high temperature will be produced. Because of the poor thermal conductivity of the plastics, they can not be released in time, and gather in the welding area, resulting in the rapid melting of the two plastic contact surface, plus a certain pressure, so that it merges into one. When the ultrasound stops, the pressure lasts for a few seconds to solidify, forming a strong chain of molecules that can be welded to a strength close to that of the raw material. The quality of ultrasonic plastic welding depends on the amplitude of transducer welding head, the pressure and welding time. The welding time and welding pressure can be adjusted, and the amplitude is changed by transducer. The rod is determined. When the energy exceeds the appropriate value, the melting amount of plastics is large, and the weld is easy to deform; if the energy is small, it is not easy to weld firmly, and the pressure can not be too large. The optimum pressure is the product of the optimum pressure on the side length and edge of the welded part of each 1mm.

 

Three. Characteristics of ultrasonic welding generator

1. High stability: All-digital integrated circuits, using high-performance anti-jamming processors imported from the United States, while reducing the number of components, simplifying the hardware structure, thereby improving the reliability of the system.

 

2. Frequency automatic tracking: Digital frequency synthesis technology combined with digital PLL frequency tracking compound control technology, can eliminate the temperature, static load, processing area, tool wear and other factors drift conventional analog regulator difficult to overcome the shortcomings, is conducive to parameter adjustment, easy to modify through the program software, easy to adjust The whole control scheme and the realization of various new control strategies.

 

3. Strong output: The use of IGBT power module and other excitation oscillation circuit structure, so that the output power is more than 1.5 times the traditional self-excited circuit.

 

4. Amplitude unlimited adjustment: Amplitude can be increased or decreased in the adjustment process instantly, but also fine-tuned, effectively prevent the size of the adhesive can be perfectly welded, effectively reduce bursting, scald and so on. The setting range of the amplitude of defective products 10%~100%

 

5. Intelligent three protection and fault alarm prompt: mold current protection too high, frequency offset protection, total output too large protection. If the equipment breaks down, the generator will stop working immediately, and give the corresponding fault cause prompt, until the technical personnel troubleshooting.

 

6. Intelligent closed loop amplitude control technology to achieve amplitude adjustment, not affected by input power supply voltage and load fluctuations to maintain a constant amplitude output.

 

7, two kinds of welding mode to switch at any time, so that the welding accuracy is higher and the effect is better.