From an engineering application perspective, the common heating media inside heated thin-walled rollers mainly include the following categories: • Water (hot water or superheated water) • Thermal oil • Circulating media with both heating and cooling functions

For intermittent production, heated thin-walled rollers can shorten waiting time and improve single-cycle efficiency; however, in continuous production, if the control system is unstable, temperature fluctuations may be amplified.