Fused Filament Deposition Modeling 3D Printing Nozzle

Abstract

The invention discloses a fused deposition modeling type 3D print head. The fused position modeling type 3D print head comprises a heat insulation mechanism, a heat dispersing mechanism, a guide pipe, a heating block, a print head body and an adjusting mechanism, wherein the heat insulation mechanism comprises an upper pipe, a middle pipe and a lower pipe; the heat dispersing mechanism comprises a heat dissipating pipe, rotating sheets and a groove; the upper pipe is screwed with the heat dissipating pipe; one end of the heat dissipating pipe inwards forms a contracting port which clings to one end of the guide pipe, and the other end of the guide pipe is propped to the upper surface of the middle pipe; a positioning groove is formed in the upper surface of the heating block, and a through hole is formed in the lower surface of the heating block; the lower pipe is screwed with the heating block; the print head body comprises a screwing part and a sliding part; the screwing part is screwed with the heating block; the adjusting mechanism comprises a T-shaped rod and a strip-shaped rod; a collecting groove and a storing groove are formed in the surface of the strip-shaped rod; a plurality of extruding rods are formed in the bottom surface of the storing groove; a contracting part is arranged at the upper end of the collecting groove; an upper thread hole in match with a lower thread hole in the screwing part is formed in the contracting part. The fused deposition modeling type 3D print head has the beneficial effects that the heat dispersing mechanism is used, so that the heat transferred to the heat dispersing pipe can be effectively dispersed; the adjusting mechanism and the print head body are used in match; the diameter of the print head can be adjusted.

Description

technical field [0001] The invention relates to the technical field of 3D printing. More specifically, the present invention relates to a fused filament deposition modeling 3D printing nozzle. 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 materia...

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 transmission causes the wire above the hot end to expand, and the wire expands to produce a huge friction force with the inner lining, causing the problem of difficult wire feeding, and the inner diameter section shape of the extrusion nozzle of the conventional 3D printer print head is only a fixed circle. The volume of nozzle spraying wire per unit time is constant

Due to the non-adjustable cross-sectional area of ​​the inner diameter of the nozzle, the printing speed of the 3D printer cannot be effectively controlled. However, different printing speeds are required for different printing purposes and different printing areas.

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