When using the ultrasonic welding process, many friends will encounter such a problem. In the process of using the ultrasonic welding mold, there will be wear or the carved shape of the welding head does not match the welding requirements of the product, so the mold needs to be shortened. Then can the ultrasonic mold be used after it is shortened? Mold shortening not only waste mold, but also may damage ultrasonic welding equipment.

The ultrasonic mold can be shortened, but we need to know that the height of the ultrasonic mold can be sharpened within 2mm. Each ultrasonic mold has a fixed frequency. When the ultrasonic mold becomes shorter, the frequency becomes higher. If the frequency exceeds the matching frequency, the equipment cannot work normally.

Knowledge supplement: 15khz Ultrasonic mold length: 17-18cm; Ultrasonic mold length: about 13cm; 28khz Ultrasonic mold length: about 10cm; 30khz Ultrasonic mold length: about 8cm.

Shorten the risk of ultrasonic mold: the welding principle of ultrasonic welding machine is: ultrasonic generator - transducer - ultrasonic mold frequency is similar, the formation of vibration loop. If the ultrasonic mold is shortened by itself, the vibration between the transducer and the ultrasonic mold will be uncoordinated, and the energy will be concentrated in the joint part of the transducer and the mold and cannot be released, thus burning out the equipment.

Therefore, in order to save the cost, do not modify the short acoustic mold or homemade mold. If the mold is worn or needs to change its shape, it is necessary to find a professional mold manufacturer for repair or re-production.