3D printing spray head with multi-section heating and micro-molten pool

The utility model provides a 3D printing spray head with multi-section heating and a micro molten pool. The nozzle comprises a throat pipe and a nozzle body, a cooling assembly is arranged on the throat pipe, a temperature control heating assembly is arranged on the throat pipe and the nozzle body, a micro molten pool and a feeding cavity are arranged in the nozzle body, the throat pipe is communicated with the micro molten pool, the micro molten pool is communicated with the feeding cavity, the feeding cavity is communicated with a nozzle, the nozzle is detachably connected with the nozzle body, and a feeding assembly is arranged in the feeding cavity. The utility model has the beneficial effects that the wire rod is simple to manufacture and form and is not limited by materials; the costand the energy consumption of the temperature control heating assembly are greatly reduced; a part obtained through metal 3D printing is more practical; the reliability of the spray head is greatly improved through the coope