Multi-stage wire feeding printing head for 3D printing of continuous fiber reinforced composite materials

Abstract

A multi-stage wire feeding printing head for 3D printing of continuous fiber reinforced composite materials comprises a fiber guiding pipe fixed to the upper surface of a first-stage heating block. An inner hole channel of the fiber guiding pipe forms a fiber channel. A first-stage throat pipe is fixed to one side of the first-stage heating block. An inner hole channel of the first-stage throat pipe forms a first-stage inner hole channel. High polymer materials penetrate the first-stage inner hole channel and enter a melting cavity of the first-stage heating block. The first-stage heating block is fixed above a second-stage heating block. A second-stage throat pipe is fixed to one side of the second-stage heating block. A second-stage throat pipe inner hole channel forms a second-stage inner hole channel. High-performance thermoplastic materials penetrate the second-stage inner hole channel and enter a melting cavity of the second-stage heating block. As analogized according to the same structure, finally, all the heating blocks are fixed to the upper face of the last-stage heating block, and a spray nozzle is fixed to the lower surface of the last-stage heating block. The multi-stage wire feeding printing head is adopted, multi-stage wrapping can be well performed on base materials for continuous fibers, and continuous fiber reinforced composite material parts with good comprehensive performance are obtained.

Description

technical field [0001] The invention relates to the technical field of 3D printing of fiber-reinforced composite materials, in particular to a multi-stage wire-feeding printing head for 3D printing of continuous fiber-reinforced composite materials. Background technique [0002] Fiber-reinforced composite materials have a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, and low density, and are widely used in aerospace and civil industries. Compared with short fiber and long fiber reinforced composites, continuous fiber reinforced composites have more excellent mechanical properties and designable properties. 3D printing technology has the characteristics of manufacturing arbitrary complex parts and having better printing freedom. Applying 3D printing technology to the manufacture of continuous fiber reinforced composite parts can produce continuous fiber reinforced composite parts with complex structures. Th...

AI Technical Summary

Problems solved by technology

[0005] 1. The mechanical properties of composite parts printed by different matrix materials are different. For example, composite parts printed by some matrix materials have high strength, but low toughness, and poor bonding performance between matrix material layers; some matrix materials are tough and elastic. Yes, the interlayer bonding performance is good, but the strength of the part is low; however, the current conventional single-stage printing nozzle can only print one kind of matrix material, so that the mechanical properties of the printed continuous fiber reinforced composite material are single, and good comprehensive performance cannot be obtained. molding parts;

[0006] 2. Due to the small specific surface area, low surface activity and poor wettability of the continuous fiber with the matrix material, the interfacial bonding performance of the composite material is poor, which seriously affects the overall excellent performance of the composite material. Therefore, it is necessary to pre-impregnate the continuous fiber. The bonding strength between the fiber and the matrix material, but the current single-stage printing nozzle is difficult to integrate the pre-impregnation process into the nozzle

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