Wire discharging method, FDM printing device, storage medium and processor

Abstract

The invention discloses a wire discharging method, an FDM printing device, a storage medium and a processor. The wire discharging method comprises the steps that a printer carries out a command of heating a spray head when receiving a request of wire discharging, the spray head is heated to a temperature for melting printing wires, then a command of wire feeding is carried out, and the wire feeding is set as first wire feeding; residual printing wires in a melting cavity are melted by the heated spray head, and wires fed in the process of the first wire feeding squeeze the residual printing wires out of the melting cavity; a command of pullback treatment is carried out, the printing wires are lifted towards an opposite direction, and thus the lower ends of the printing wires are enabled tostay in an area between the center point of a heat dissipation area of a throat pipe and the entrance position of the throat pipe; and a cooling command is carried out, and when the printing wires after pullback are cooled to a hardened state, a wire discharging command is carried out to discharge the printing wires. According to the wire discharging method, the wires in the melting cavity are prevented from being brought out when the wire discharging is carried out, and the wires cannot be compressed flatly when passing a spring pressing device; the phenomenon of wire clamping is avoided, the wires in the melting cavity cannot be brought out, a wire guide hole is prevented from being hooked, and the success rate of wire discharging is guaranteed.

Description

technical field [0001] The invention relates to the technical field of 3D printing, and in particular to a wire unwinding method, an FDM printing device, a storage medium and a processor. Background technique [0002] FDM fused layer deposition modeling technology is a kind of 3D printing. It heats and melts filamentous hot-melt materials. At the same time, under the control of the computer, the three-dimensional nozzle selectively coats the material on the workbench according to the cross-sectional profile information. On, a layer of section is formed after rapid cooling. After one layer of molding is completed, the workbench is lowered to a height (that is, the thickness of the layer) and then the next layer is formed until the entire solid shape is formed. [0003] Since the feed of the FDM printer is driven by a pair of extrusion rollers, such as figure 1 As shown, the pair of extrusion-type rollers refers to the wire feeding driving wheel 6 and the wire feeding driven...

AI Technical Summary

Problems solved by technology

Since the material of the printing filament is softened when it is heated at a high temperature, it passes through a spring compression device ( figure 1 The point D shown in is the occlusal point of the printing wire), and the wire is flattened, so that the diameter of the wire becomes larger, which is larger than the diameter of the guide wire hole ( figure 1 The EF segment in the middle is the wire guide tube), and the wire will be stuck at this time; in addition, due to the characteristics of the printing wire, the wire in the melting chamber will be taken out when the wire is withdrawn, and the shape of the brought out is different, and it is easy to hook into the wire guide hole. Therefore, it will also cause abnormal wire withdrawal

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