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3D printing method for continuous fiber woven body reinforced fiber composite material

A 3D printing, continuous fiber technology, applied in additive processing, 3D object support structure, additive manufacturing, etc., can solve the problems of low fiber content, poor interlayer bonding performance, low structural strength, etc. The effect of enhancing the bonding force between layers and enhancing the strength

Pending Publication Date: 2022-03-29
JILIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the existing problems, the present invention refers to the idea of ​​"laying steel bars first, then pouring cement" in the field of construction, and integrates the high fiber content of short-fiber silk and the high structural strength of long-fiber silk, and at the same time integrates the weaving and Combining acupuncture technology with 3D printing technology, a new path is proposed to solve the problems of low fiber content, low structural strength and poor interlayer bonding performance of fiber 3D printing materials

Method used

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  • 3D printing method for continuous fiber woven body reinforced fiber composite material
  • 3D printing method for continuous fiber woven body reinforced fiber composite material
  • 3D printing method for continuous fiber woven body reinforced fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Carry out sizing treatment to the carbon fiber, then make the carbon fiber into a plain weave structure through a weaving process, and then use molten PLA resin to impregnate it to prepare a continuous fiber braid;

[0060] (2) According to the mass ratio: 50% of short carbon fibers, 45% of PLA resin fibers, 3% of silane coupling agent, and 2% of lubricants are mixed to make felts, and the felts are needled and rolled into strips. Heat strip felt at 230-250°C for 6-10 minutes, twist and extrude through extrusion equipment at a pressure of 6-10MPa, then cool and cut into short carbon fiber reinforced PLA resin substrates of appropriate width;

[0061] (3) Import 3D printing model;

[0062] (4) The short carbon fiber-reinforced PLA resin substrate obtained in step (2) is heated, melted and stirred, and sent to the No. 1 3D printing nozzle, and the continuous fiber braid in step (1) is heated and sent to the No. 2 3D printing nozzle. Nozzle;

[0063] (5) The printer ...

Embodiment 2

[0067] (1) Perform electrochemical treatment on the aramid fiber, then make the aramid fiber into a twill weave structure through a weaving process, and then impregnate it with molten PEEK resin to prepare a continuous fiber braid;

[0068] (2) According to the mass ratio: 55% of short aramid fiber, 40% of PEEK resin fiber, 3% of silane coupling agent, and 2% of dispersant are mixed to make a felt, and the felt is needled and rolled into strips Heat strip felt at 250-270°C for 8-10 minutes, twist and extrude through extrusion equipment at a pressure of 9-13MPa, and cut it into short aramid fiber-reinforced PEEK resin with appropriate width after cooling Substrate;

[0069] (3) Import 3D printing model;

[0070] (4) The short aramid fiber-reinforced PEEK resin base material obtained in step (2) is heated, melted and stirred and sent to No. 1 3D printing nozzle, and the continuous fiber braid obtained in step (1) is heated and sent to No. 2 nozzle. No. 3D printing nozzle;

[...

Embodiment 3

[0075] (1) The continuous fiber is electrochemically treated, and then the continuous fiber is made into a three-dimensional braided structure through a weaving process, and then it is impregnated with molten PP resin to prepare a continuous fiber braid; the continuous fiber is hemp Mixed fiber of fiber and basalt fiber;

[0076] (2) According to the mass ratio: 58% of the short mixed fiber (hemp fiber and basalt fiber mixed fiber), 37% of PP resin fiber, 3% of maleic anhydride, and 2% of thermal oxygen stabilizer are mixed to make felt. After needle-punching, the felt is gathered and rolled into strips, and the strip-shaped felt is heated at 230-240°C for 7-9 minutes, twisted and extruded at a pressure of 8-11MPa through the extrusion equipment, and then cooled. Short mixed fiber reinforced PP resin substrate cut into appropriate width;

[0077] (3) Import 3D printing model;

[0078] (4) The short mixed fiber reinforced thermoplastic resin substrate is heated, melted and st...

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Abstract

The invention provides a 3D printing method for a continuous fiber woven body reinforced fiber composite material, and belongs to the field of 3D printing material forming. A short fiber reinforced thermoplastic resin matrix composite material is adopted as a matrix, a continuous fiber woven body is adopted as a supporting framework, the matrix material is injected into the supporting framework in a hot melting mode through heating, needling Z-direction reinforcement is assisted, and 3D printing forming of the novel fiber reinforced composite material is achieved. According to the technology, the fiber content of the continuous fiber composite material is effectively increased, the weaving and needling processes in the textile industry are combined with the 3D printing technology, the binding force between the continuous fiber woven body and thermoplastic resin is enhanced by pretreating the continuous fiber woven body, and meanwhile the Z-direction needling enables fibers to have an enhancing effect on the interlayer binding force; the strength of the composite material structure can be obviously improved. The problems that a fiber 3D printing material is low in fiber content, low in structural strength, poor in interlayer bonding performance and the like are effectively solved.

Description

technical field [0001] The invention relates to the field of 3D printing and molding, in particular to a 3D printing method for continuous fiber braided reinforced fiber composite materials. Background technique [0002] The 3D printing technology of fiber-reinforced resin-based composites provides the possibility of low-cost manufacturing of thermoplastic composites, and has great application prospects in aerospace, new energy vehicles and other fields. Among the 3D printing technologies of fiber composite materials, only the short fiber printing process is relatively mature, but the improvement of the mechanical properties of the specimen by short fibers is very limited, and the continuous fiber reinforced thermoplastic resin matrix composite material 3D printing technology is expected to achieve low-cost high-performance composite materials. Rapid manufacturing, but there are still several problems that restrict its popularization and application. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/141B29C64/209B29C64/295B29C64/314B29C69/00B29C69/02B29C70/12B29C70/40B29C70/54B33Y10/00B33Y30/00B33Y40/10
CPCB29C64/314B29C64/141B29C64/209B29C64/295B33Y10/00B33Y30/00B33Y40/10B29C69/001B29C69/02B29C70/12B29C70/40B29C70/54
Inventor 李志刚杨京浩刘雪强张长琦王悦王明辉赵宏武韩洪江
Owner JILIN UNIV
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