SCREW FEEDING DEVICE, AND MATERIAL EXTRUSION SYSTEM AND METHOD FOR 3D PRINTING

摘要

A screw feeding device, and a material extrusion system and method for 3D printing. The screw feeding device (40) is configured to convey a flowable material to an extrusion orifice (51), and in a material extrusion process, the width of the extraction orifice (51) continuously changes. The screw feeding device (40) comprises: a screw (41); and a rotation controller (42) configured to drive the screw (41) to rotate. The screw feeding device (40) is configured to meet Qmax/D2<5 cm/min, and L/D≤5, Qmax representing the maximum flow rate of the flowable material conveyed by the screw feeding device (40), D representing the diameter of the screw, and L representing the length of the screw. The technical solution facilitates improving the control precision of the screw feeding device (40) for the material flow rate when the material flow rate changes dynamically within a wide range.