Double-color-mixed printing head of FDM-based 3D printer

Abstract

The invention relates to a double-color-mixed printing head of an FDM-based 3D printer. The double-color-mixed printing head comprises a nozzle, a feeding assembly, a heating and temperature measuring assembly and a heat radiating assembly; the feeding assembly comprises two groups of feeding pipes, conveying pipes and throat pipes, wherein the feeding pipes and the conveying pipes respectively extend into the heat radiating assembly from the upper and lower ends, the conveying pipes extend into the throat pipes, and the lower ends of the conveying pipes are leveled with the lower ends of the throat pipes; the nozzle is mounted at the lowerend of the heating and temperature measuring assembly; the throat pipes are located between the heating and temperature measuring assembly and the heat radiating assembly; and the side end of the heat radiating assembly is also provided with a cooling assembly. The double-color-mixed printing head has the advantages that the throat pipes are arranged between the heating and temperature measuring assembly and the heat radiating assembly, so that the temperature transfer between the heating and temperature measuring assembly and the heat radiating assembly is isolated, and the heat radiating effect is improved; in addition, the cooling assembly is additionally arranged to cool the heat radiating assembly, so that head blockage caused by backflow of consumables in a molten state is effectively avoided, the frequency of head blockage is effectively reduced, and the control distance for back pumping quantity is increased.

Description

technical field [0001] The invention relates to a printer, in particular to a dual-color-mixing print head based on an FDM3D printer. Background technique [0002] FDM is an abbreviation for "Fused Deposition Modeling", which is fused deposition modeling. The principle of fused deposition molding is as follows: under the control of the computer, the heating nozzle moves in the X-Y plane according to the cross-sectional profile information of the product parts. The semi-liquid state is then extruded, selectively coated on the worktable, and rapidly cooled to form a thin layer of approximately 0.127mm thick profile. After the section forming of one layer is completed, the workbench is lowered to a certain height, and then the cladding of the next layer is carried out, as if "drawing" the profile of the section layer by layer, and so on, finally forming a three-dimensional product part. FDM is currently a widely used technology in 3D printers, and FDM molding technology has b...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a dual-color printing head based on FDM3D printers, which can effectively prevent the extrusion head from frequently blocking and solve the problem of too small withdrawal

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