Preparing method of 3D printing wire embedded with fiber wires

Abstract

The invention belongs to the technical field of 3D printing, and discloses a preparing method of a 3D printing wire embedded with fiber wires. The method specifically comprises the following steps that firstly, a base body material is fed into a guide channel through a feeding mechanism, and the fiber wires are manually guided into a softening channel or fusing channel in advance; secondly, the feeding mechanism continuously feeds the base body material in, the base body material is softened in the softening channel and drives the fiber wires to descend, the base body material is fused in thefusing channel and spirally move around the axis of the fusing channel to enable the fiber wires to be automatically positioned on the axis of the fusing channel; thirdly, after extrusion is finished,the feeding mechanism stops feeding, and the extrusion head body continuously moves in any direction to enable a shearing cutter to cut off the fiber wires. Through the method, the fiber wires can beautomatically and accurately placed on the center of the wires without driving force independent applying, and automatic cutting off is achieved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a method for preparing a 3D printing wire embedded with fiber filaments. Background technique [0002] Continuous fiber composites have excellent properties such as high modulus, high strength, high toughness, good thermal stability, and strong designability, and have important application prospects in aerospace, national defense and military industries, and civil industries. Traditional continuous fiber composite molding processes include thermocompression molding, RTM molding, winding molding, pultrusion molding, lamination molding, etc., which have played a very important role in promoting the development and application of continuous fiber composite materials, but there have always been some The disadvantages cannot be overcome. For example, most molding processes require special molds. The molding process is complicated and the processing cost is high. It is difficult to...

AI Technical Summary

Problems solved by technology

[0005] 1. The wettability of fiber filaments and thermoplastic matrix materials in the extrusion molding process is not enough, resulting in insufficient fusion of matrix materials and fiber filaments after curing, so that the mechanical properties of the final formed components still cannot reach the level of traditional technology

[0006] 2. It is impossible to ensure that the fiber filaments are always in the center of the molten substrate fluid during the composite material extrusion molding process, which affects the precise controllability of the fiber filament routing path, and at the same time makes the interlayer strength poor after stacking molding, and the performance of the components cannot fully meet the actual use. need

[0007] 3. In the existing 3D printing process of continuous fiber composite materials, the shearing of continuous fibers is mostly realized by external shearing devices. By controlling the movement of the shearing device, the jump during printing and the shearing of continuous fibers when printing is completed are realized. , not only has a huge motion structure, but also needs to cooperate with complex motion control algorithms, which greatly limits the molding speed of continuous fiber composite 3D printing

[0009] This method solves some of the problems existing in the prior art, but there are still some problems that have not been solved: the fiber cannot enter the center of the matrix material; the structure is too complicated and the driving implementation method is complicated

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