Laminated-oriented 3D printer nozzle mechanism

Abstract

The invention discloses a laminated-oriented 3D printer nozzle mechanism. The mechanism involves an upper machine head and a lower machine head, wherein the upper machine head and the lower machine head are positioned through positioning bosses, a first inner thread section, grooves and a second inner thread section are sequentially arranged in the upper machine head and the lower machine head along the radial direction, the second inner thread section located at the ends of the upper machine head and the end of the lower machine head is connected with an outer thread of a nozzle, a first layering section, a first torsion section, a second layering section, a second torsion section and a confluence section are sequentially arranged in a cavity formed by connecting the grooves of the uppermachine head and the lower machine head in the radial direction. The fused printing wire material flows into a laminated-oriented 3D printer nozzle, then is subjected to the process of layering, twisting, re-layering, re-twisting and confluence, so that the melt can be continuously subjected to strong shearing action, the material can be more uniformly mixed; and meanwhile, the orientation state of the high polymer is more obvious, so that the mechanical property of the material is improved.

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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