Ultrathin metal sheet sandwich structural body and preparation method thereof

A sandwich structure, metal sheet technology, applied in the direction of metal layered products, chemical instruments and methods, lamination, etc., can solve problems such as insufficiency, and achieve the effect of high fire rating, light weight and high rigidity

Inactive Publication Date: 2014-04-02
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not sufficient from the standpoint of thickness reduction and high rigidity required for the sandwich structure

Method used

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  • Ultrathin metal sheet sandwich structural body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The FR100 series PET structural foam (specific gravity of 100kg / m 3 ) is cut into 4mm thickness and surface size of 320mm*250mm (weight is 32g) as a foam with independent closed-cell cells, and the elastic modulus of the foam is 70MPa according to ASTM D 638 test; then in the foam The upper and lower surfaces are directly coated with a thermoplastic resin adhesive layer;

[0042] Cut the 7075 series aluminum alloy of Southwest Aluminum into 0.5mm thickness and 320mm*250mm surface size (weight is 2 pieces) as ultra-thin metal sheet material, the modulus of ultra-thin metal sheet material is 72GPa; a thin metal sheet material is laminated on both upper and lower surfaces of the foam coated with a thermoplastic resin adhesive layer to provide a laminate;

[0043] Prepare a steel flat mold with levelness and smoothness ranging from 5 to 13, and the steel flat mold has a concave-convex surface, and the thickness can be controlled from 1 to 10mm. Place the above-mentioned la...

Embodiment 2

[0046] Rohacell's 71WF type PMI structural foam (specific gravity 70kg / m 3 ) is cut into 4mm thickness and 320mm*250mm surface size (weight is 23g) as a foam with independent closed-cell cells, and the elastic modulus of the foam is 92MPa according to ASTM D 638 test; then in the foam The upper and lower surfaces are directly coated with a thermosetting resin adhesive layer;

[0047] Cut the 6061 series aluminum alloy sheet of Southwest Aluminum into 0.4 thickness and 320mm*250mm surface size (weight is 89g, 2 pieces) as ultra-thin metal sheet material, and the modulus of ultra-thin metal sheet material is 75GPa; Laminating the ultra-thin metal sheet material on the upper and lower surfaces of the foam coated with a thermosetting resin adhesive layer to provide a laminate;

[0048] Prepare a steel flat mold with levelness and smoothness ranging from 5 to 13, and the steel flat mold has a concave-convex surface, and the thickness can be controlled from 1 to 10mm. Place the abo...

Embodiment 3

[0051] The method of film lamination is used to compound discontinuous reinforcing fibers and thermoplastic resin films, and a layer of reinforcing fiber materials sandwiched by two layers of thermoplastic resin films is formed into a core material of thermoplastic discontinuous reinforcing fibers after being pressurized and heated by steel belt rollers; The specific gravity of the core material is 1.0, and the thickness is 5.0mm; the melting point or load deformation temperature or glass transition temperature of the thermoplastic resin is above 80°C; then the upper and lower surfaces of the core material are directly coated with a thermoplastic resin adhesive layer;

[0052] Cut the 304 stainless steel strip from Shanxi Titanium Steel Stainless Steel Precision Co., Ltd. into 0.2mm thickness and 320mm*250mm surface size (weight is 124g, 2 pieces) as ultra-thin metal sheet material, and the modulus of ultra-thin metal sheet material It is 205GPa; the ultra-thin metal sheet mate...

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Abstract

The invention relates to an ultrathin metal sheet sandwich structural body which is an ultrathin metal sheet sandwich structural body (III) consisting of a core material (I) and ultrathin metal sheets (II) arranged on the upper and lower surfaces of the core material (I), wherein the core material (I) has a gap; the specific gravity of the core material (I) is 0.01-1.0, and the core material (I) is 0.2-5.0mm thick. The gap is formed by bubbles of a foaming body, or the core material (I) is formed by discontinuous reinforced fibers and thermoplastic resin. The gap is formed by gaps formed at mutual intersections among the discontinuous reinforced fibers. The ultrathin metal sheet sandwich structural body prepared by the invention is small in thickness, light in weight, high in rigidity, good in surface scratch resistance, puncture resistance and easy to process. The middle core material is bended but not cracked, so that the structural body is good in weather ability and high in fireproof grade, and is mainly applied to surface structural panels of crates in the fields of 3C (computer, communication and consumer electronic) industry, household appliance industry and related industries.

Description

technical field [0001] The invention relates to an ultra-thin metal sheet sandwich structure and a preparation method thereof. Background technique [0002] In recent years, components with light weight, thin walls and high rigidity have been widely used in computers, communication industries, home appliance industries, and automotive parts, building parts, and panel parts. As a member that can ensure mechanical properties and improve lightness, a sandwich structure formed by arranging fiber-reinforced resin (FRP) reinforced by continuous reinforcing fiber groups on the skin of a lightweight core material is known. In order to reduce the weight, a lighter core material is selected. Balsa wood core, honeycomb core or polyurethane foam core are frequently used as core materials. However, existing known balsa cores, honeycomb cores, or polyurethane foam cores are difficult to prepare as thinner core materials. Even if thin core materials can be obtained, they will be destroye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/08B32B15/14B32B27/04B32B37/06B32B27/10B32B38/18
Inventor 陈大华黄险波吴晓军高雄宋威
Owner GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
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