The principle of ultrasonic plastic welding is that the generator generates 20KHz (or 15KHz) high voltage and high frequency signals. Through the energy conversion system, the signals are converted into high-frequency mechanical vibration, which is applied to the plastic workpiece. The temperature transmitted to the interface increases through the workpiece surface and the friction between molecules. When the temperature reaches the melting point of the workpiece itself, the workpiece interface melts rapidly, and then fills the gap between interfaces. When the vibration stops, At the same time, the workpiece is cooled and shaped under a certain pressure to achieve perfect welding. There are many misunderstandings about ultrasonic welding machine. The following is a detailed introduction of Xiao Bian. I hope it will be helpful to you.

　1. Misunderstandings of welding materials:

　Because there are many and complicated materials in society, especially new materials created constantly. The requirements for welding are very high. Therefore, not all similar materials can be welded. For example, there is a huge difference between plastic materials. Ultrasonic plastic welding machine cannot effectively weld all plastics. Welding depends on the melting point of the material. Only when the melting point of the two materials is similar, can effective welding be carried out.

　2. Misunderstanding of welding principle:

　Many practitioners who operate ultrasonic welding machines have a misconception about the transmission of ultrasonic energy. They think that ultrasonic directly conducts welding on the contact surface of the welding workpiece. In fact, this is a wrong understanding. The real welding principle is: after the ultrasonic transducer converts electrical energy into mechanical energy, it conducts through the material molecules of the workpiece. The sound resistance of sound wave in solid is far less than that in air, When the sound wave passes through the seam of the workpiece, the sound resistance in the seam is large, and the heat energy generated is quite large. The temperature first reaches the melting point of the workpiece, and then the seam is welded with a certain pressure.

　3. Misunderstanding of welding process:

　There are many kinds of ultrasonic welding methods. Some people think that ultrasonic plastic welding machine can weld well as long as it is made of plastic materials, which is also a mistake. Because the ultrasonic energy star is instantaneous, when the instantaneous energy is generated, the larger the joint area, the more serious the energy dispersion, the worse the welding effect, or even the inability to weld. Another reason is that the ultrasonic wave propagates longitudinally, and the energy loss is proportional to the distance. The farther the distance is, the smaller the welding effect will be. Therefore, the arm thickness of the workpiece cannot be less than 2MM, otherwise it cannot be welded well. For different welding products (materials) and welding effects (forming points or lines), special welding processes are required.

　4. Misunderstanding of ultrasonic mold:

　The ultrasonic mold is customized according to the product. The ultrasonic mold made of different welding parts is different. Some people mistakenly believe that the ultrasonic mold is just an aluminum alloy. In fact, the design and manufacture of the ultrasonic mold are very particular. In fact, the ultrasonic mold is the most technologically advanced aspect of the ultrasonic welding technology. Even though we have several years of design and development experience, we still firmly believe that only through strict testing and quality control can we produce the best ultrasonic welding head. Whether the design is reasonable or not directly affects the efficiency, service life, product qualification rate of the ultrasonic mold, and will directly burn out the generator in serious cases. The shape, strength, audio frequency and other parameters of the ultrasonic welding head have been tested many times, and can meet the most stringent standards. The ultrasonic welding head and the ultrasonic mold achieve the most perfect match.

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