Continuous fiber reinforced resin base composite 3D printing wire preparing method and device

Abstract

The invention discloses a continuous fiber reinforced resin base composite 3D printing wire preparing method and device. The method comprises the steps that a dry fiber bundle and thermosetting resinprepolymer solid under the normal temperature, an initiating agent of the prepolymer, thermoplastic resin or a mixed resin system is taken as a preparing raw material, the fiber bundle is sequentiallysubject to multi yarn spreading, yarn dividing, thermoplastic resin preimpregnation and yarn combining treatment, and a continuous fiber reinforced resin base composite 3D printing wire is obtained;the device comprises the fiber bundle wound on an unwinding mechanism, the fiber bundle sequentially passes through a clamping mechanism and a tension control wheel and receives infrared dual-face irradiation sent by an upper infrared lamp and a lower infrared lamp, after irradiation, the fiber bundle sequentially passes through the yarn spreading mechanism and an air flow jetting yarn spreading mechanism and then enters a preimpregnation groove to be pre-impregnated with hot melt resin, after complete impregnation, the fiber bundle sequentially passes through a yarn combining nozzle and a cooling mechanism and is wound on a winding material cylinder. Fiber and resin are sufficiently soaked, the fiber-resin microcosmic surface is controllable in combination, and the comprehensive performance of a forming component is excellent.

Description

technical field [0001] The invention relates to the technical field of 3D printing of composite materials, in particular to a preparation method and device for 3D printing filaments of continuous fiber-reinforced resin-based composite materials. Background technique [0002] 3D printing technology is based on a digital model, through the use of bondable materials such as metal powder or plastic linear wire, in a layer-by-layer printing or layer-by-layer selective bonding method to construct rapid additive materials. Manufacturing Technology. 3D printing consumables are the material basis of 3D printing and also the bottleneck that restricts the further development and application of 3D printing. At present, 3D printing consumables are mainly divided into four types: ceramics, metals, composite materials and polymers. Commonly used 3D printing consumables are mainly pure thermoplastic filaments, including acrylonitrile-butadiene-styrene copolymer (ABS), polylactic acid (PLA...

AI Technical Summary

Problems solved by technology

3D printing consumables are the material basis of 3D printing and also the bottleneck that restricts the further development and application of 3D printing

However, due to the defects of the chopped fiber itself, there are always limits to its addition amount and fiber length; the thermoplastic resin itself has many shortcomings such as shrinkage cracking, warping deformation, poor heat resistance and corrosion resistance, and low strength and hardness; and it is only simple. Blending dry fibers with molten resin makes it difficult to fully infiltrate the fibers and resin, resulting in poor fiber-resin interface of the component and obvious defects in the thermoplastic resin; overall, its performance for 3D printing composite components has been enhanced , but with limited enhancement

[0004] In summary, there is currently no method or device for the preparation of high-performance continuous fiber-reinforced resin-based composite materials for 3D printing filaments

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