A fiber-reinforced composite material ring-wrapped printing nozzle

Abstract

The present invention relates to the field of 3D printing technology, and provides a fiber-reinforced composite material ring-shaped coating printing nozzle, including a feeding part, an extrusion mechanism, an impregnation chamber, a ring-shaped coating nozzle, and a measurement and control part; wherein, the feeding part The resin material is mainly provided at a constant speed and quantitatively, and its lower end is connected with the extrusion mechanism. The resin is extruded at a constant speed under the action of the heating ring and the screw, and enters the impregnation chamber; in the impregnation chamber, the resin is mixed with the fiber and wrapped through the ring Nozzle extrusion molding, the bottom of the ring-shaped coating nozzle is a flat structure, which can compact the molding surface after the composite material is molded, reduce the internal porosity, and improve the bonding effect between layers; during the printing process, more Two temperature and pressure parameters need to be collected and controlled. On the one hand, the printing nozzle of the present invention realizes rapid and efficient mixing of resin and fiber, and on the other hand, realizes compact printing of resin and fiber, which can improve the mechanical properties of molded parts.

Description

technical field [0001] The invention belongs to the field of composite material 3D printing (additive manufacturing), and relates to a fiber-reinforced composite material annular coating printing nozzle. Background technique [0002] 3D printing (additive manufacturing) technology is a method of forming three-dimensional parts by accumulating layers of materials. Compared with traditional subtractive manufacturing, this method improves the geometric accuracy of processing on the one hand, and greatly reduces the waste of materials on the other hand. In addition, this method can also realize intelligent and digital processing and manufacturing, which improves the efficiency of parts trial production. [0003] Fiber-reinforced composite materials have the characteristics of good mechanical and chemical properties, recyclability and low density. They are widely used in the fields of aviation industry and automobile manufacturing. To this end, some scientific research institut...

AI Technical Summary

Problems solved by technology

The existing technology mainly feeds continuous fiber and resin wire into the nozzle respectively, and the resin is heated and melted and then mixed with fiber impregnation, limited by the internal structure and thermal distribution of the nozzle, the infiltration effect of fiber and resin is poor, and the fiber is easily absorbed Resin flow scours away wear and directly affects the mechanical properties of printed parts

In addition, the main material of the existing continuous fiber reinforced composite 3D printing technology is the wire that needs to be formed in the early stage. The complicated wire forming process and the limited wire size directly restrict the further improvement of the 3D printing efficiency. Therefore, a new type of 3D printing is developed. It is very urgent to print nozzles for fiber-reinforced composite materials that can adapt to granular and powder printing and have excellent molding mechanical properties.

Images