Frequency Selection of Ultrasonic Welding Machine

- Dec 27, 2019-

The most common frequency of the ultrasonic welding machine is 15khz and 20khz ultrasonic plastic welding machine. The higher the ultrasonic frequency, the better the welding accuracy, but the smaller the relative power and the smaller the amplitude. The following introduces the difference between 15khz and 20khz ultrasonic plastic welding machines:

Noise will generate noise when the frequency is low. When the frequency is lower than 20khz, the noise will become very large during ultrasonic welding. For plastic products with higher welding accuracy, the higher the frequency, the better. Therefore, the ultrasonic welding machine with a frequency of 20khz or higher is suitable for precision, ultra-thin, very fragile plastic parts, such as SD cards or products with a crystal inside the product. The power of a 15khz ultrasonic welding machine is easier to increase and the amplitude is relatively large. , Suitable for welding larger, difficult to weld, relatively rough plastic products;


From the appearance, the transducers of 15khz and 20khz ultrasonic plastic welding machines can be distinguished. The transducers of 15khz ultrasonic machines are generally inverted tapered, the screw hole specifications are M16X1.0 teeth, and the transducers of 20khz ultrasonic welding machines are Generally, it is cylindrical and has a smaller diameter. The screw specifications are inch 3/8 inch 24 teeth.

Secondly, the size of 15khz and 20khz ultrasonic molds is also inconsistent. The 15khz ultrasonic mold is generally about 17cm long, while the 20khz ultrasonic mold is about 12.5cm long.

Again, the 15khz ultrasonic plastic welding machine can weld larger workpieces, and the power can be divided into 2600w / 3200w / 4200w. The 20khz ultrasonic plastic welding machine is 900W-2000w, with less power and smaller product size.

More information, please contact us at +86 13823278054(Lily)