Fiber enhanced composite material annularly coated printing nozzle

Abstract

The invention relates to the technical field of 3D printing and provides a fiber enhanced composite material annularly coated printing nozzle. The fiber enhanced composite material annularly coated printing nozzle comprises a feeding part, an extruding mechanism, an impregnating cavity, an annularly coated nozzle and a measuring and controlling part, wherein the feeding part is primarily used forproviding a resin material quantitively at a constant speed and the lower end of the feeding part is connected to the extruding mechanism; the resin is extruded at the constant speed under the actionof a heating ring and a screw to enter the impregnating cavity; in the impregnating cavity, the resin and the fibers are mixed and are extruded and formed through the annularly coated nozzle. The bottom end of the annularly coated nozzle is of a planar structure. The formed surface can be compacted after the composite material is formed, so that the inner porosity is reduced, and the laminar bonding effect is improved. In the printing process, a plurality of temperature and pressure parameters need to be collected and controlled. The printing nozzle mixes the resin and the fibers quickly and efficiently on the one hand, and compacts and prints the resin and the fibers on the other hand, so that the mechanical property of a formed part can be improved.

Description

Technical field [0001] The invention belongs to the field of composite 3D printing (additive manufacturing), and relates to a fiber-reinforced composite material ring-shaped coating printing nozzle. Background technique [0002] 3D printing (additive manufacturing) technology is a method of forming three-dimensional parts by stacking layers of materials. Compared with the 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, and improve the efficiency of the part trial production link. [0003] Fiber-reinforced composite materials have the characteristics of good mechanical and chemical properties, recyclability and low density, and their applications in the aviation industry and automobile manufacturing are becoming more and more extensive. For this reason, some sc...

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.

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