A stack-oriented 3D printer nozzle mechanism

Abstract

The invention discloses a layer-oriented 3D printer nozzle mechanism, comprising an upper machine head and a lower machine head, the upper machine head and the lower machine head are positioned by a positioning boss, and the upper machine head and the lower machine head are arranged radially in sequence inside There are a first internal thread segment, a groove and a second internal thread segment, the second internal thread segment located at the end of the upper head and the lower head is connected to the external thread of the nozzle, and the grooves of the upper head and the lower head are connected A first layered section, a first torsion section, a second layered section, a second torsion section and a converging section are arranged radially in the cavity formed afterward. The molten printing filament flows into the 3D printer nozzle of the stack orientation, and goes through the process of layering-twisting-re-layering-re-twisting-convergence, so that the melt is continuously subjected to strong shearing action to make the material more uniformly mixed, At the same time, the orientation state of the polymer is more obvious, thereby increasing the mechanical properties of the material.

Description

technical field [0001] The invention belongs to the technical field of 3D printing equipment, and in particular relates to a nozzle mechanism of a stacked orientation 3D printer. Background technique [0002] 3D printing is to form the required parts by layer-by-layer accumulation of materials. Based on the digital three-dimensional CAD model file, specific materials such as filaments and sheets are stacked layer by layer. This molding method has low manufacturing cost, Short production cycle and other advantages. At present, the products of 3D printers have poor mechanical properties such as strength and stiffness, and cannot be used in the engineering field very well. Reinforced and modified composite materials need to be used. However, when using short fiber reinforcement or one-dimensional / two-dimensional inorganic nanoparticle reinforcement such as carbon nanotubes in the plastic matrix, the orientation distribution of these fillers has a large randomness, resulting in...

AI Technical Summary

Problems solved by technology

At present, the products of 3D printers have poor mechanical properties such as strength and stiffness, and cannot be used in the engineering field. Reinforced and modified composite materials are required.

However, when using short fiber reinforcement or one-dimensional / two-dimensional inorganic nanoparticle reinforcement such as carbon nanotubes in the plastic matrix, the orientation distribution of these fillers has a large randomness, resulting in defects in their microstructure and resulting in far inferior mechanical properties. To meet the desired performance index requirements, there is an urgent need for a device that can uniformly disperse short fibers or nanofillers in the matrix component and control the orientation

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