In the production line of printing industry, ultrasonic welding machine provides reliable and stable welding technology. According to the welding materials, it can be divided into ultrasonic plastic welding machine and ultrasonic metal welding machine. Compared with hot plate welding machine, ultrasonic technology is safer and can solve more material welding. The production of this industry is basically 24-hour coupling, and the quality requirements of welding machines are relatively high. Today, let's take a look at the factors affecting the welding quality of ultrasonic welding machine.

Ultrasonic welding machine is through the high-frequency vibration generated by ultrasonic wave, which acts on the material workpiece to promote the mutual fusion of two material polymers, so as to achieve the effect of material fusion. Then the factors affecting the welding quality of ultrasonic welding machine mainly include amplitude and frequency. First, look at the amplitude. Different transducers have different output amplitudes. The output amplitude of the transducer of general ultrasonic metal welding machine is usually 5-20 microns and the working amplitude is 10-30 microns. The factors that determine the working amplitude of the transducer include the horn, the shape of the welding head and the output amplitude. Ultrasonic welding machine connects materials through this reciprocating amplitude movement, so it directly affects the quality of welding. Each welder has its central frequency, and the welding situation is different with different frequencies. The working frequency of welding machine depends on the mechanical resonance frequency of ultrasonic transducer, horn and welding head. Because ultrasonic technology has a good effect on material welding, hot plate welding machine has been gradually replaced in the printing industry. In the process of making new welded joints, it is necessary to adjust the resonant frequency to ensure the error of resonant frequency, and the design error frequency does not exceed 0.1khz. At present, the ultrasonic frequency is less than 20 kHz, and the actual welding frequency is less than 5%.

The amplitude and frequency of ultrasonic welding machine directly affect the welding quality, so we should pay attention to these two aspects in the process of use. If there is a problem with the amplitude and the vibration frequency error is too large, it should be adjusted. At present, the frequency of ultrasonic metal welding machine is 20kHz, and the error shall not exceed 5%. If it exceeds, it shall be adjusted immediately. Although the hot plate welding machine will not have these problems, its welding quality is relatively poor. As long as we take both factors into account in the welding process, the welding quality of ultrasonic welding machine will be improved qualitatively.