Composite material manufactured by three-dimensionally braiding preimpregnated continuous fibers and method thereof

A continuous fiber and composite material technology, which is applied in the field of composite materials manufactured by three-dimensional weaving of prepreg continuous fiber, can solve the problems of uneven thickness of prefabricated parts, high resin content, high resin requirements, etc., and achieve good stability in cold and hot cycles , Excellent mechanical properties, low thermal expansion coefficient

Inactive Publication Date: 2019-08-02
XIAN SPACE STAR TECH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite material manufactured by three-dimensional weaving of prepreg continuous fibers and a method thereof, by first fully impregnating the fiber and resin, and then through three-dimensional weaving and cur

Method used

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  • Composite material manufactured by three-dimensionally braiding preimpregnated continuous fibers and method thereof
  • Composite material manufactured by three-dimensionally braiding preimpregnated continuous fibers and method thereof
  • Composite material manufactured by three-dimensionally braiding preimpregnated continuous fibers and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) First, impregnate the carbon fiber bundles with modified benzoxazine resin at 60°C to obtain pre-impregnated carbon fiber bundles;

[0032] 2) Next, use a vertical circular three-dimensional braiding machine to weave the prepreg carbon fiber on the outer surface of the fluororubber mandrel to form a blank;

[0033] 3) Then, put the fluororubber core mold and the blank into the closed metal outer mold, put the whole mold into the oven for heating and curing after closing the mold, and set the transmission mechanism to make the whole mold slowly along the axis of the core mold during the heating process. Rotation, final curing to obtain high-quality resin-based carbon fiber composite products with uniform resin distribution and fiber volume content greater than 55%.

Embodiment 2

[0035] 1) First, the glass fiber bundles are impregnated with modified bismaleimide resin at 70°C to obtain prepreg glass fiber bundles;

[0036] 2) Next, use a horizontal circular three-dimensional braiding machine to weave the prepreg glass fiber on the outer surface of the silicone rubber mandrel to form a blank;

[0037] 3) Then, put the silicone rubber mandrel and the blank into the closed metal outer mold, put the mold as a whole into the oven to heat and solidify after closing the mold, and set the transmission mechanism to make the mold as a whole move slowly along the mandrel axis during the heating process. Rotation, final curing to obtain high-quality resin-based glass fiber composite products with uniform resin distribution and fiber volume content greater than 55%.

Embodiment 3

[0039] 1) First, impregnate the Kevlar fiber bundles with modified phenolic resin at 80°C to obtain pre-impregnated Kevlar fiber bundles;

[0040] 2) Next, use a vertical circular three-dimensional knitting machine to weave the prepreg Kevlar fiber on the outer surface of the fluorosilicone rubber mandrel to form a blank;

[0041] 3) Then, put the fluorosilicone rubber core mold and the blank into the closed metal outer mold. After the mold is closed, put the mold as a whole into the oven for heating and curing, and set the transmission mechanism to make the mold as a whole along the axial direction of the core mold during the heating process. Rotate slowly, and finally cure to obtain high-quality resin-based Kevlar fiber composite products with uniform resin distribution and fiber volume content greater than 55%.

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Abstract

The invention relates to a composite material manufactured by three-dimensionally braiding preimpregnated continuous fibers and a method thereof. The method comprises the following steps: first, impregnating a continuous fiber bundle in thermosetting resin to obtain a preimpregnated continuous fiber bundle; then weaving a blank piece on the outer surface of a rubber mandrel by using a three-dimensional braiding machine; and finally, putting the rubber mandrel and the blank in a closed metal outer mold, integrally heating the inner and outer molds and rotating the inner and outer molds slowly along the axial direction of the mandrel in the heating process to cure a composite material so as to prepare a high quality resin-based continuous fiber composite material product, resin of which is distributed uniformly. The method overturns a flow of weaving and injecting glue successively in a conventional three-dimensionally braided composite material manufacturing process. By impregnating thefibers and the resin fully, the resin content and the resin distributing uniformity are controlled better and the resin and the fibers are fully impregnated through three-dimensional braiding and curing processes, so that the high performance continuous fiber composite material which is excellent in mechanical property, good in cold and hot circulating stability and low in coefficient of thermalexpansion is prepared.

Description

technical field [0001] The invention belongs to the technical field of continuous fiber composite material preparation, and in particular relates to a composite material manufactured by three-dimensional braiding of prepreg continuous fiber and a method thereof. Background technique [0002] Three-dimensional braided composite material is an advanced composite material manufacturing technology developed in the 1980s to meet the needs of structural and functional composite materials in the aerospace field. Three-dimensional integral composite materials overcome the shortcomings of traditional laminated composite materials that are easily delaminated and damaged, and have more excellent mechanical properties. broad prospects. [0003] At present, the manufacturing method of three-dimensional braided continuous fiber composite materials is usually to make the product preform by three-dimensional braiding of continuous fiber first, then place the braided prefabricated part in t...

Claims

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Application Information

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IPC IPC(8): B29C70/42B29C70/54
CPCB29C70/42B29C70/54
Inventor 李菡冀有志许培俊张宁
Owner XIAN SPACE STAR TECH IND GRP
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