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Sandwich type composite panel and forming process thereof

A composite material and interlayer technology, which is applied in the direction of lamination, layered products, lamination devices, etc., can solve the problem of high porosity of sandwich composite material panels, high requirements for operating environment and personnel, and poor infiltration of glass fiber fabrics. Sufficient and other issues, to achieve the effect of good compactness, good consistency, and few parts

Active Publication Date: 2021-05-28
北京航天和兴科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the residual air gathers in the middle, the resin cannot infiltrate the glass fiber fabric, and the foam will seriously affect the flow between the upper and lower layers of the resin, making the problem of insufficient infiltration of the glass fiber fabric under the foam even more serious, and the sandwich composite material finally obtained The panel has high porosity, poor compactness, uneven distribution of resin content, low product consistency, and high requirements for operating environment and personnel, which is not conducive to batch operation

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A sandwich composite material panel, comprising: an upper skin, a core material and a lower skin, the thickness ratio of the upper skin layer, the core material, and the lower skin layer is 1:3:1; the upper skin is composed of a surface layer, an interlayer and a final The surface layer is glass fiber fabric impregnated with resin, and the surface density of glass fiber fabric is 300g / m 2 , the weight ratio of the resin is 60%, and the interlayer is a prepreg surface material of boron-carbon hybrid fiber with a modified EP content of 45% (area density is 100g / m 2 ), the last layer is the same as the surface layer, the lower skin is the same as the upper skin, and the core material has a bulk density of 90g / m 2 PET closed-cell foam preform.

[0021] The molding process of the above-mentioned sandwich composite material panel is as follows: first prepare the upper skin and the lower skin, then place the upper skin in the upper mold, place the lower skin in the lower mold...

Embodiment 2

[0026] A sandwich composite material panel, comprising: an upper skin, a core material and a lower skin, the thickness ratio of the upper skin layer, the core material, and the lower skin layer is 1:3:1; the upper skin is composed of a surface layer, an interlayer and a final The surface layer is glass fiber fabric impregnated with resin, and the surface density of glass fiber fabric is 100g / m 2 , the weight ratio of the resin is 70%, and the interlayer is a prepreg surface material of flax-carbon hybrid fiber with a modified EP content of 40% (area density is 150g / m 2 ), the last layer is the same as the surface layer, the lower skin is the same as the upper skin, and the core material has a bulk density of 100g / m 2 PET closed-cell foam preform.

[0027] The molding process of the above-mentioned sandwich composite material panel is as follows: first prepare the upper skin and the lower skin, then place the upper skin in the upper mold, place the lower skin in the lower mold...

Embodiment 3

[0032] A sandwich composite material panel, comprising: an upper skin, a core material and a lower skin, the thickness ratio of the upper skin layer, the core material, and the lower skin layer is 1:3:1; the upper skin is composed of a surface layer, an interlayer and a final The surface layer is glass fiber fabric impregnated with resin, and the surface density of glass fiber fabric is 200g / m 2 , the weight ratio of the resin is 50%, and the interlayer is a prepreg surface material of polyethylene-carbon hybrid fiber with a modified EP content of 43% (area density is 200g / m 2 ), the last layer is the same as the surface layer, the lower skin is the same as the upper skin, and the core material has a bulk density of 80g / m 2 PET closed-cell foam preform.

[0033] The molding process of the above-mentioned sandwich composite material panel is as follows: first prepare the upper skin and the lower skin, then place the upper skin in the upper mold, place the lower skin in the low...

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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PUM

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Abstract

The invention provides a sandwich type composite panel and a forming process thereof. The sandwich type composite panel comprises an upper skin, a core material and a lower skin, the upper skin is composed of a surface layer, an interlayer and a tail layer, the lower skin is the same as the upper skin, and the core material is a PET closed-cell foam preform. During forming, a preparation method of the upper skin comprises the following steps: laying a glass fiber fabric on the surface of a mold, uniformly infiltrating resin on the glass fiber fabric, and carrying out wet-process pressure forming to obtain a surface layer; longitudinally paving a pre-impregnated surface material on the surface layer at +45 degrees, conducting heating and vacuumizing, preserving heat, conducting heating and vacuumizing, and preserving heat; continuously and transversely paving a pre-impregnated surface material at the angle of -45 degrees, conducting heating and vacuumizing, preserving heat, conducting heating and vacuumizing, and preserving heat to obtain an interlayer; and laying a layer of glass fiber fabric on the surface of the interlayer, uniformly infiltrating resin on the glass fiber fabric, and carrying out wet-process pressure forming. The sandwich type composite material panel is good in compactness, high in rigidity, good in consistency, simple in forming process, easy to operate and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of composite material forming, in particular to a sandwich type composite material panel and a forming process thereof. Background technique [0002] Traditional lightweight, sandwich composite panels mostly use PU or PVC foam as the core material insulation layer, and glass fiber fabric reinforcement material is used as the skin structure layer, which is prepared by wet method or imported one-time molding process. Since the residual air gathers in the middle, the resin cannot infiltrate the glass fiber fabric, and the foam will seriously affect the flow between the upper and lower layers of the resin, making the problem of insufficient infiltration of the glass fiber fabric under the foam even more serious, and the sandwich composite material finally obtained The panel has high porosity, poor compactness, uneven distribution of resin content, low product consistency, and high requirements on the operating e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/02B32B17/12B32B9/00B32B9/04B32B27/36B32B17/10B32B37/06B32B37/10B32B38/08B29C70/68B29C70/78
CPCB32B5/02B32B5/18B32B5/26B32B5/245B32B37/06B32B37/10B32B38/08B29C70/683B29C70/78B32B2260/021B32B2260/046B32B2262/101B32B2262/106B32B2266/0264B32B2250/40
Inventor 刘广顺杨红娜朱文飞
Owner 北京航天和兴科技股份有限公司