Softening and early-fusing protective device for 3D printing material filament

Abstract

The invention discloses a softening and early-fusing protective device for a 3D printing material filament. The softening and early-fusing protective device comprises a feeding guide tube, an air tube, a guide tube clamp, a heat dissipation tube, a throat tube, a heating block sheath, a heating block and a spray nozzle, wherein the feeding guide tube enters the air tube outside a processing cavityand enters the processing cavity along with the air tube, and air is fed to the heat dissipation tube along the air tube from the outer part of the processing cavity for cooling; heat dissipation fanblades of the heat dissipation tube extend axially while stretching outwards in the radial direction; an air baffle circular disc at the bottom of the heat dissipation tube changes an air feeding direction, so that air is prevented from being blown to the heating block; and the heating block sheath is additionally arranged on the heating block. The softening and early-fusing protective device effectively solves the problem that the spray nozzle is blocked as a fan cannot be adopted for cooling in the processing cavity, and the material filament is softened and fused early before reaching thespray nozzle during high-temperature plastic 3D printing, guarantees uniformity of heat, in a processing process, of the heating block, and is not affected by a printing temperature. The device does not need a complex water cooling channel, has the characteristics of being simple in structure, low in cost and easy to assemble, and has relatively high practicability and good economic benefits.

Description

technical field [0001] The invention relates to fused deposition modeling (Fused Deposition Modeling, FDM) in the technical field of 3D printing, and relates to a 3D printing filament softening and early melting protection device. Background technique [0002] FDM 3D printing is to use the computer to slice the three-dimensional CAD solid model of the part according to a certain thickness to generate two-dimensional cross-sectional information; then, according to the cross-sectional information of each layer, the heating nozzle controlled by the computer will heat the wire, It is melted, extruded and bonded to the working platform, then rapidly cooled and solidified; after each layer of section is completed, the working table is lowered to the height of a layer, and then the next layer of modeling is continued. Repeat this until the modeling of the entire entity is completed. [0003] In FDM printing, the filament is required to maintain sufficient rigidity without softenin...

AI Technical Summary

Problems solved by technology

In high-temperature plastic printing where the melting temperature is as high as 400°C and the ambient temperature is as high as 200°C, it is difficult to install a fan safely in the processing chamber; even if a fan is installed or other methods are used to supply air, the wind not only reduces the temperature of the filament through the heat dissipation pipe, but also It will also blow to the heating block, which will lead to uneven temperature of the heating block, and then lead to uneven melting temperature of the filament, which will seriously affect the quality of the molded parts

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