Preparation method and equipment of high-strength and high-fiber-volume-content resin-based composite material

A composite material and volume content technology, which is applied in the field of resin-based composite materials, can solve the problems of low shear strength of the part layer, white spots on the product, and insufficient penetration, etc., to achieve increased fiber volume content, high fluidity, Avoid the effect of white spots

Pending Publication Date: 2022-01-21
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current conventional process methods often cannot solve the problems of increased fiber volume, white spots and insufficient penetration in the product after molding, or excessive interlayer shear strength of the product after solving the defects of white spots and insufficient penetration in the product. Therefore, the development of resin-based composite materials urgently needs innovative process methods to improve the mechanical properties of resin-based materials, so as to provide sufficient process support for the wider application of resin-based materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method and equipment of high-strength and high-fiber-volume-content resin-based composite material
  • Preparation method and equipment of high-strength and high-fiber-volume-content resin-based composite material
  • Preparation method and equipment of high-strength and high-fiber-volume-content resin-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) The minimum effective length and width of the mold cavity is 391mm×291mm, the mold cavity height is 20mm, the cut fabric size is 390mm×290mm, the fabric (type B quartz fiber cloth) specification: 0.28mm thick, surface density: 291.32g / cm 2 , 80 layers of fabric. (2) After layering, the fabric is pre-pressed to be 2 mm higher than the thickness of the mold cavity, and then shaped. (3) The laminated fabric is stitched with a needle-punching stitching mechanism, and the stitching distance is 10mm×10mm. (4) The final pressure of the mold, using the upper and lower surfaces of the mold to further press the pre-pressed fabric that is 2mm higher than the thickness of the mold cavity, so that the thickness of the fabric and the mold cavity are equal. (5) The molding process, the application of reactor pressure and the control of the vacuum degree in the mold cavity during the molding process are carried out alternately. Preheat the reaction kettle, mold, and metal hose be...

Embodiment 2

[0049] (1) The minimum effective length and width of the mold cavity is 391mm×291mm, the height of the mold cavity is 20mm, the cut fabric size is 389mm×289mm, the fabric (type B quartz fiber cloth) specification: 0.28mm thick, surface density: 291.32g / cm 2 , 80 layers of fabric. (2) After layering, the fabric is pre-pressed to be 3mm higher than the thickness of the mold cavity, and then shaped. (3) The laminated fabric is stitched with a needle-punching stitching mechanism, and the stitching distance is 10mm×10mm. (4) The final pressure of the mold, using the upper and lower surfaces of the mold to further press the pre-pressed fabric that is 3mm higher than the thickness of the mold cavity, so that the thickness of the fabric and the mold cavity are equal. (5) The molding process, the application of reactor pressure and the control of the vacuum degree in the mold cavity during the molding process are carried out alternately. Preheat the reaction kettle, mold, and metal h...

Embodiment 3

[0051] (1) The minimum effective length and width of the mold cavity is 391mm×291mm, the height of the mold cavity is 20, the cut fabric size is 390×290, the fabric (type B quartz fiber cloth) specification: 0.28mm thick, surface density: 291.32g / cm 2 , 80 layers of fabric. (2) After layering, the fabric is pre-pressed to be 1 mm higher than the thickness of the mold cavity, and then shaped. (3) The laminated fabric is stitched with a needle-punching stitching mechanism, and the stitching distance is 10mm×10mm. (4) The final pressure of the mold, using the upper and lower surfaces of the mold to further press the pre-pressed fabric that is 1mm higher than the thickness of the mold cavity, so that the thickness of the fabric and the mold cavity are equal to fill the cavity. (5) The molding process, the application of reactor pressure and the control of the vacuum degree in the mold cavity during the molding process are carried out alternately. Preheat the reaction kettle, mol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a preparation method and equipment of a high-strength and high-fiber-volume-content resin-based composite material. The method comprises the following steps of S1, fabric size control; S2, fabric pre-pressing; S3, fabric sewing; S4, fabric final pressing; and S5, injection molding. The equipment is mainly composed of a pre-pressing mechanism, a needling sewing mechanism, a mold and an injection suction system. According to the preparation method and equipment, the fiber volume content of a composite material and the structural uniformity and thickness uniformity of a fabric layer and a layer workpiece are improved through fabric pre-pressing, the interlayer binding force of the composite material is improved by needling and sewing the pre-pressed fabric, the application range of the composite material is expanded, meanwhile it is guaranteed that the pre-pressed fabric does not deform, the sewed fabric is further pressed by the mold before forming, so that the volume content of the fibers is further increased. The fabric is infiltrated by the resin through pressurized injection molding, so that the high-strength and high-fiber-volume-content resin-based composite material can be obtained.

Description

technical field [0001] The invention relates to the field of resin-based composite materials, in particular to a preparation method and equipment for a resin-based composite material with high strength and high fiber volume content. Background technique [0002] For fiber-reinforced resin-based composites, the mechanical properties of the material are closely related to the volume content of the fibers contained in them. As the volume content of fibers increases, the mechanical properties of resin-based composites also gradually increase. In aerospace, the requirements on the mechanical properties of materials are relatively strict, and the mechanical properties of fiber-reinforced resins and composite materials are often improved by increasing the volume content of fibers per unit volume. The structural form of fiber fabrics has a greater impact on permeability. The permeability of this kind of fabric decreases with the increase of fiber volume percentage. If the fiber volu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C70/54B29C33/00
CPCB29C70/36B29C70/54B29C33/00
Inventor 李艳阳任海成郭培江高银东李润暖
Owner 湖北三江航天江北机械工程有限公司
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