Fused body continuous extrusion device

The utility model relates to a fused body continuous extrusion device, which is mainly used in fusing depositing rapid prototyping equipment. The utility model comprises a heating cylinder, a nozzle, a motor, an extrusion threaded rod and a motor output shaft, wherein the nozzle is arranged at the lower end of the heating cylinder, the motor is fixedly arranged on the heating cylinder, the extrusion threaded rod is rotatable and is arranged inside the heating cylinder, and the upper end of the extrusion threaded rod is connected with the motor output shaft. A heat dissipating device is arranged between the heating cylinder and the motor, and a feeding device is communicated with the side wall of the heating cylinder. The utility model is characterized in that the extrusion device adopts the fusing extrusion continuous design, omits a wire feed system, and extrudes fused materials directly out from the nozzle via the motor driving the threaded rod. Because the extruding force is notably enhanced, the utility model can stably extrude casting wax that is of low viscosity and polymers such as ABS and polypropylene that are of high viscosity, and completely avoids the phenomenon of nozzle blockage. Besides, molding materials are directly added into the feed cylinder through a feeding device, and agglomerate, granular or powdery thermoplastic polymers molding materials can all be directly added into the feed cylinder without being prefabricated into filament materials, which realizes continuous feeding.