The temperature of the ultrasonic transducer during plastic welding operations must never exceed 85°C. The heating of the ultrasonic transducer during use is mainly caused by three reasons:

During plastic welding, the welded parts may heat up, or substances processed by ultrasonic methods in the Persian Gulf can generate heat. Additionally, molds (tool heads) and variable amplitude rods may overheat after prolonged use, transferring this heat to the transducer.

Secondly, the power loss inherent in the transducer itself. Since achieving a 100% energy conversion efficiency is unattainable, the lost energy inevitably converts into heat. This temperature rise can lead to changes in the transducer's parameters, gradually shifting it away from the matched state. More严重ly, the temperature rise can also degrade the performance of the piezoelectric ceramic chips.

This, in turn, exacerbates the transducer's operating condition, causing it to heat up faster, creating a vicious cycle. Therefore, we must provide the transducer with adequate cooling conditions, typically room-temperature air cooling; if necessary, cold air cooling can also be employed. Under normal circumstances, the temperature rise caused by these two factors is also normal, and there should be no major issues with the cooling.

In practice, we have found that there is a third reason: the customer failed to match the transducer with the drive power supply to the working state. This causes significant heat generation, which is uncontrollable and can lead to severe consequences. Additionally, as the temperature rises, the mechanical strength of the aluminum material sharply declines, making cracking inevitable under high-power operation.