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Preparation method of asymmetrically infiltrated high-collimation high-surface-viscosity fabric prepreg

A prepreg, asymmetric technology, applied in the field of additive manufacturing, which can solve the problem of high cost and achieve the effect of low-cost manufacturing, guaranteed alignment, and good surface adhesion

Pending Publication Date: 2022-03-01
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides a method for preparing an asymmetric impregnation high-alignment high-surface-adhesion fabric prepreg to solve the technical problem of high cost in the molding of existing resin-based composite materials

Method used

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  • Preparation method of asymmetrically infiltrated high-collimation high-surface-viscosity fabric prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Use high-toughness medium-temperature curing epoxy resin as the matrix resin of the fabric prepreg, use EW301F glass fiber fabric as the reinforcement material, and the surface density of the fabric prepreg is 460g / m 2 , the width is 1000mm, and the surface density of glass fiber fabric is 285g / m 2 , The surface density of the resin film is 175g / m 2 . The preparation process of asymmetric infiltration high alignment and high surface tack fabric prepreg is discussed now.

[0058] (a) Preheat the medium-temperature curing epoxy resin and put it into the glue film machine, and prepare a surface density of 175g / m under the condition of the resin viscosity of 110Pa·s 2 (accounting for 38% of the mass content of the fabric prepreg) continuous resin film;

[0059] (b) Set the areal density to 285g / m 2 The EW301F fabric is led into the gap between the first pair of prepreg rollers through the unwinding device, and the infrared tracking deviation correction device is turned ...

Embodiment 2

[0064] High-toughness high-temperature curing epoxy resin is used as the matrix resin of the fabric prepreg, CF8611 carbon fiber fabric is used as the reinforcement material, and the surface density of the fabric prepreg is 327g / m 2 , the width is 1000mm, and the CF8611 fabric area density is 196g / m 2 , The surface density of the resin film is 131g / m 2 . The preparation process of asymmetric infiltration high alignment and high surface tack fabric prepreg is discussed now.

[0065] (a) Preheat the high-temperature cured epoxy resin and put it into the film machine, and prepare a continuous resin film with an area density accounting for 40% of the mass content of the fabric prepreg under the condition of a resin viscosity of 130 Pa s;

[0066] (b) Set the surface density to 196g / m 2 The CF8611 fabric is led into the gap between the first pair of prepreg rollers through the unwinding device, and the infrared tracking deviation correction device is turned on, and the deviation...

Embodiment 3

[0071] High tenacity bismaleimide resin is used as the matrix resin of the fabric prepreg, EW100A glass fiber fabric is used as the reinforcement material, and the surface density of the fabric prepreg is 182g / m 2 , the width is 1000mm, and the surface density of EW100A fabric is 100g / m 2 , The surface density of the resin film is 82g / m 2 . The preparation process of asymmetric infiltration high alignment and high surface tack fabric prepreg is discussed now.

[0072] (a) Preheat the bismaleimide resin and put it into the film machine, and prepare a continuous resin film with an area density accounting for 45% of the mass content of the fabric prepreg under the condition of a resin viscosity of 150 Pa s;

[0073] (b) Set the areal density to 100g / m 2 The EW100A fabric is guided into the gap between the first pair of prepreg rollers through the unwinding device, and the infrared tracking deviation correction device is turned on, and the deviation angle between the infrared t...

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Abstract

The invention relates to the technical field of additive manufacturing, in particular to a preparation method of asymmetrically infiltrated high-collimation high-surface-viscosity fabric prepreg. In the preparation method, firstly, a continuous resin adhesive film is prepared, after a fabric is led into a prepreg compression roller gap, the fabric unwinding tension is adjusted and optimized by utilizing deviation angle feedback of an infrared tracing line and a fabric weft tracing line, so that the collimation of the fabric prepreg is ensured; the method comprises the following steps: firstly, preparing a fabric prepreg, further ensuring the quality of the fabric prepreg and enhancing the strength of the fabric prepreg, then introducing a resin adhesive film to the upper surface of the fabric, and simultaneously introducing release paper to the lower surface of the fabric, so that a combination of the resin adhesive film, the fabric and the release paper sequentially passes through a heating plate and a hot pressing roller to finish heating and hot pressing, thereby realizing preparation of the fabric prepreg by coating the adhesive film on a single surface. The non-infiltration area on the lower surface of the fabric prepreg is used for vacuum air guide, the requirement of a prepreg / vacuum bag forming process for the high air guide performance of the prepreg is met, and low-cost manufacturing of a high-performance composite material is achieved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method for preparing an asymmetric impregnation fabric prepreg with high alignment and high surface viscosity. Background technique [0002] Advanced resin-based composites have the advantages of excellent specific strength, specific stiffness, fatigue resistance, designable stiffness, and easy realization of integrated design of structure and function. When applied in the aerospace field, they show advantages that other materials cannot match. [0003] In the shaping and prefabrication of prefabricated bodies with complex structures, the most important composite molding technology at home and abroad is the autoclave molding technology, which is suitable for skin and wall panels with large size and relatively low structural complexity. manufacturing. Prepreg composites can guarantee a high fiber volume fraction and thus have excellent in-plane mechanical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C70/56B29C65/18
CPCB29C70/34B29C70/54B29C70/56B29C65/18B29C66/45
Inventor 张扬李伟东王峰张一川周洪飞
Owner AVIC COMPOSITES
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