FDM printer spray head and 3D printer applying same

Abstract

The invention discloses an FDM printer spray head and a 3D printer applying the same. The FDM printer spray head comprises a motor, a feeding assembly, a radiator, a heating block and an extrusion nozzle, the FDM printer spray head further comprises a throat pipe assembly, the throat pipe assembly comprises a throat pipe and a mounting piece, the throat pipe is made of materials which have good high temperature resistance and block heat conduction, and the throat pipe is mounted between the radiator and the heating block through the mounting piece, and a gap is reserved between the upper end face of the throat pipe and the radiator; the motor drives the feeding assembly to feed materials to the heating block through the throat pipe, and the materials are extruded through the extrusion nozzle. The throat pipe is made of a high-temperature-resistant, good-heat-insulation and self-lubricating material or a teflon material, heat conduction through the throat pipe is greatly reduced, the temperature of a feeding channel above the heating block is low enough, it is guaranteed that the material is not softened, and the fed low-hardness and high-elasticity material can be effectively transmitted before entering the heating block.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to an FDM printer nozzle and a 3D printer using the same. Background technique [0002] FDM (Fused Deposition Modeling) in 3D printing is a fused deposition manufacturing (FDM) process. The material of FDM is generally a thermoplastic material, such as wax, ABS, nylon, etc., which is fed in filament form, and the material is heated and melted in the nozzle. The nozzle moves along the section profile of the part and the filling track, and at the same time extrudes the molten material, and the material solidifies rapidly and coagulates with the surrounding materials. Most of the existing FDM printers use remote feeding, the feeding motor is far away from the nozzle, and it is impossible to send soft materials to the nozzle, so most of them can only print hard materials, such as PLA, ABS, etc. High, and the wire feeding path design of the material is unreasonable, and only high-h...

AI Technical Summary

Problems solved by technology

Most of the existing FDM printers use remote feeding, the feeding motor is far away from the nozzle, and it is impossible to send soft materials to the nozzle, so most of them can only print hard materials, such as PLA, ABS, etc. High, and the wire feeding path design of the material is unreasonable, and only high-hardness thermoplastic elastomer materials with a Shore hardness above 80A can be used for printing

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