The Design of Wire Feeding Mechanism for Desktop 3D Printer

3D printing technology has developed for decades in our country, desktop 3D printers are gradually used popularly. Focused on the problems of large friction and instability of the wire feeder in the desktop 3D printer of FDM technology. The mechanisms of the internal and external wire feeding are studied and designed separately. The structure of crank slider and extensible beam are adopted by the external wire feeding mechanism, finite element analysis and optimization of design for frame, while increased the auxiliary trimming device for the internal wire feeding, thereby improving the performance of the wire feeding mechanism, reducing wire feed resistance, ensuring the stable of nozzle, improving printing quality.