Switching to electromagnetic heating to reduce energy consumption and improve thermal efficiency is an inevitable trend in the plastics industry. Advantages of electromagnetic heating for plastic machinery: Currently, the heating method used in plastic processing machinery on the market is the traditional resistance heating coil, which heats up and then transfers the heat to the barrel. Since only the heat close to the inner surface of the barrel is transferred to the barrel, while the heat from the outer circle is mostly lost to the air, this leads to significant heat loss and an increase in ambient temperature. Electromagnetic heating technology, however, causes the metal barrel to heat itself, and the barrel is also wrapped in insulating and heat-insulating materials, greatly reducing heat transfer losses and the dissipation of heat into the air, thus improving thermal efficiency and preventing an increase in ambient temperature. Consequently, the energy-saving effect is remarkable, reaching 30% to 75%. Since the electromagnetic heating coil does not generate heat itself and is made of insulating materials and high-temperature cables, there is no issue of the resistance wire in the original electric heating coil oxidizing at high temperatures and shortening its service life. It boasts a long service life, fast heating speed, and minimal need for maintenance, reducing maintenance time and lowering costs.