Transitioning to electromagnetic heating to reduce energy consumption and increase thermal efficiency is an inevitable trend in the plastics industry. Advantages of plastic machinery electromagnetic heaters: Currently, the heating method used in plastic processing machinery on the market is the traditional resistive electric heater, which heats up and then transfers the heat to the barrel. Since only the heat adjacent to the inner circumference of the barrel is transferred to the barrel, while most of the heat in the outer circumference dissipates into the air, this leads to significant heat loss and an increase in environmental temperature. Electromagnetic heating technology, however, causes the metal barrel to heat itself, and the barrel is also wrapped in insulating thermal insulation material, greatly reducing heat conduction losses and heat dissipation into the air, improving thermal efficiency, and preventing the rise in environmental temperature. Therefore, the energy-saving effect is very significant, reaching 30% to 75%. Because the electromagnetic heating coil itself does not generate heat 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 has the advantages of a long service life, fast heating speed, and rarely requiring maintenance, reducing maintenance time and costs.