Segmented heating device for hot runner of metal tube and rod part

The invention relates to the technical field of steel/aluminum/copper wire rope casting rigging heating devices, in particular to a hot runner segmented heating device for metal pipe and rod parts. A sectional furnace cover of the device comprises an upper sectional furnace cover and a lower sectional furnace cover, hot runner heaters comprise an upper hot runner heater and a lower hot runner heater, the upper hot runner heater is arranged in the upper sectional furnace cover, the lower hot runner heater is arranged in the lower sectional furnace cover, and the hot runner heaters are connected with a power supply and a temperature control system. According to the device, the temperature is accurately controlled in a hot runner heating mode, the steel/aluminum/copper wire rope casting connector is rapidly and efficiently preheated, the operation efficiency is improved, and meanwhile mechanical property attenuation and surface oxidation caused by long-time high temperature of a steel/aluminum/copper wire rope m