Anti-blocking 3D printing spray head device

Abstract

The invention discloses an anti-blocking 3D printing spray head device. The anti-blocking 3D printing spray head device comprises a radiating mechanism, a guide tube, a heat insulating mechanism, a heating block and a spray head which are detachably connected from top to bottom in sequence, and further comprises an air feeding mechanism, wherein the heat insulating mechanism comprises an upper tube, a middle tube and a lower tube; the radiating mechanism comprises a radiating tube and a radiating sheet; the radiating tube is equipped with a groove; the upper tube is inserted into the groove so as to be in threaded connection with the radiating tube; one end, away from the heat insulating mechanism, of the radiating tube is inwards reduced to form a shrunk hole; the guide tube is inserted into the radiating tube and fits with the shrunk hole; the other end of the guide tube abuts against the upper surface of the middle tube; the upper surface of the heating block is downwards sunken to form an accommodating slot; the lower surface of the heating block is upwards sunken to form a through hole; the bottom surface of the accommodating slot communicates with the top surface of the through hole; the lower tube is inserted into the accommodating slot so as to be in threaded connection with the heating block; one end of the spray head is inserted into the through hole so as to be in threaded connection with the heating block; and the air feeding mechanism comprises an air feeding cover, a fan and a spray nozzle. The anti-blocking 3D printing spray head device has the beneficial effects of reducing and diffusing heat transmitted to the radiating tube, and effectively promoting a material extruded from the spray head to form through the air feeding mechanism.

Description

technical field [0001] The invention relates to the technical field of 3D printing. More specifically, the present invention relates to an anti-clogging 3D printing nozzle device. Background technique [0002] Fused filament deposition modeling is currently the fastest-growing and most promising 3D printing rapid prototyping technology. The working principle of fused deposition modeling is that the hot-melt material, such as ABS, is first melted by the heater and drawn into a filament, and then the FDM molding equipment sends the filament-shaped printing material into the hot-melt nozzle through the wire feeding mechanism, and is drawn in the nozzle. Heating and melting, the nozzle moves along the section profile and filling trajectory of the part, extrudes the semi-fluid material according to the path controlled by the CAD layered data of the processed product, deposits it at the designated position, solidifies and forms, and bonds with the surrounding materials, layer by ...

AI Technical Summary

Problems solved by technology

At present, 3D printers based on FDM technology often encounter the problem of blockage caused by wire expansion during use. The main reason is that the plastic wire melts at the hot end of the nozzle after being heated. The upward transfer causes the wire above the hot end to expand, and the wire expands to produce a huge friction force with the inner lining, resulting in difficulty in feeding the wire

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