Spray head structure of combined 3D printer

The invention discloses a spray head structure of a combined 3D printer. The spray head structure comprises a spray head shell. The spray head shell comprises a feeding shell body, a middle shell body and a nozzle shell body. A limiting ring is fixedly arranged at the feeding end in the feeding shell body. The inner circular face of the limiting ring is a conical face and is provided with a sealing ring matched with the conical face of the limiting ring. A spring is arranged between the sealing ring and the inlet end face in the feeding shell body. A first filter net is arranged in the feeding shell body. An electric heating wire heating ring is arranged on the feeding shell body. A second filter net is arranged in the middle shell body. An infrared heater is arranged on the middle shell body. A third filter net is arranged in the nozzle shell body. A hot water heat conductive layer is arranged on the nozzle shell body. The sizes of filter holes in the first filter net, the second filter net and the third filter net are gradually reduced. By means of the spray head structure of the combined 3D printer, the product quality can be improved.