Novel extrusion mechanism for 3D printer

Abstract

The invention discloses a novel extrusion mechanism for a 3D printer. The mechanism comprises a base, a motor is vertically arranged on the base, an output shaft of the motor is connected with a driving wheel, the driving wheel is engaged with an internal thread gear and can drive an internal thread gear to rotate, an internal thread of the internal thread gear can make contact with the outer wall of a consumable, a pair of consumable anti-twist wheels is further rotationally arranged on the base, the two consumable anti-twist wheels are located on two sides of the consumable correspondingly and make contact with the consumable, when the motor drives the driving wheel to rotate, the internal thread gear rotates horizontally and drives the consumable to rotate, the consumable makes axial movement after making contact with the consumable anti-twist wheels, the deflection deformation of the consumable anti-twisting wheel axial rotation consumable end is reduced, the working stability and the printing precision of the extrusion mechanism are improved, and meanwhile, the overall installation space size is reduced.

Description

technical field [0001] The invention relates to the field of 3D printing equipment, in particular to a novel extrusion mechanism for a 3D printer. Background technique [0002] The basic principle of the FDM-level 3D printer print head is that the motor drives the extruder, and the consumables are fed in the form of filaments, passing through the heat sink and throat, and finally heated at the nozzle into micron-scale filaments and moving with the nozzle, according to The 3D model cross-sectional profile is accumulated, solidified and formed, and finally forms the process of physical parts. Among them, the motor and the extrusion wheel constitute the driving mechanism of the entire print head. The motor drives the extrusion wheel to rotate, and the extrusion wheel contacts the consumables. The friction generated by the contact surface continuously provides the axial driving force for the consumables, making the consumables realize Extrusion and retraction movements. In the...

AI Technical Summary

Problems solved by technology

Under the premise of a certain cantilever length L, the gravity G and the extruding force F of the consumables act at the same time. The larger the cantilever length L, the greater the self-weight G of the extrusion mechanism, and the greater the extrusion force F of the motor, the greater the deflection deformation of the consumables end. The larger it will be, the worse the working stability of the extrusion mechanism will be, and the lower the printing accuracy will be;

[0005] 2. The extruder adopts a built-in deceleration and torque-lifting structure, the axial extension length L is relatively large, and the overall space occupied by the 3D printer is also relatively large

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