Abstract: An extrusion device and a 3D printer are provided. The extrusion device includes a feeding mechanism, a discharging mechanism, a first driving mechanism, a switching mechanism and a second driving mechanism. The feeding mechanism includes a first feeding pipe and a second feeding pipe. The discharging mechanism includes a discharging pipe, and the discharging pipe is connected to the first feeding pipe and the second feeding pipe. The first driving mechanism is used for driving a consumable in the first feeding pipe or the second feeding pipe to move. The switching mechanism corresponds to the first feeding pipe and the second feeding pipe, and the second driving mechanism corresponds to the switching mechanism and is used for driving the switching mechanism to switch between a first state and a second state. The working efficiency of the apparatus can be improved.

Abstract: A feeding device and a 3D printer are provided. The feeding device includes a first connecting pipe, a second connecting pipe, a feeding power unit, a temperature adjusting device and a resin vat containing a resin liquid. The temperature adjusting device includes a heat exchange pipeline, a liquid intake end of the heat exchange pipeline is connected to a first end of the first connecting pipe, a liquid output end of the heat exchange pipeline is connected to a first end of the second connecting pipe, a second end of the first connecting pipe and a second end of the second connecting pipe are both located in the resin vat, and at least one of the first connecting pipe and the second connecting pipe is provided with the feeding power unit.

Abstract: A feeding device and a 3D printer are provided. The feeding device includes a first connecting pipe, a second connecting pipe, a feeding power unit, a temperature adjusting device and a resin vat containing a resin liquid. The temperature adjusting device includes a heat exchange pipeline, a liquid intake end of the heat exchange pipeline is connected to a first end of the first connecting pipe, a liquid output end of the heat exchange pipeline is connected to a first end of the second connecting pipe, a second end of the first connecting pipe and a second end of the second connecting pipe are both located in the resin vat, and at least one of the first connecting pipe and the second connecting pipe is provided with the feeding power unit.