Multi-stage heating type particle 3D printer

A multi-stage heating type particle 3D printer relates to the technical field of 3D printing and comprises a shell, a screw arranged in the shell and used for extruding raw materials, a nozzle connected with the discharging end of the shell and a driving mechanism used for driving the screw to rotate, a first heating component is arranged in the screw, a second heating component is arranged on the outer wall face of the lower portion of the shell, and the second heating component is connected with the nozzle. A third heating part is arranged at the joint of the nozzle and the discharge end of the shell, and the heating temperatures of the first heating part, the second heating part and the third heating part are controllable. According to the device, particle raw materials can be uniformly heated, so that the recycling of 3D printing wastes is facilitated. 多级加热式颗粒3D打印机，涉及3D打印技术领域，其包括外壳、设置在外壳内并用于挤出原材料的螺杆、连接外壳出料端的喷嘴和用于驱动螺杆转动的驱动机构，所述螺杆的内部设置有第一加热部件，所述外壳下部的外壁面设有第二加热部件，所述喷嘴与外壳出料端的连接部位设置有第三加热部件，所述第一加热部件、第二加热部件和第三加热部