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Method for preparing foamed aluminum laminboard by utilizing waste foamed aluminum

A technology of waste foam and foam aluminum, which is applied in chemical instruments and methods, lamination, building components, etc., can solve the problems of difficult disposal of waste aluminum foam, and achieve excellent oxidation resistance, low production energy consumption, and reduced production costs. Effect

Active Publication Date: 2012-11-07
南京国重新金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that it is difficult to deal with a large amount of waste and old foam aluminum produced in the existing production process of foam aluminum, the invention discloses a method for preparing foam aluminum sandwich panels by using waste and old foam aluminum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing foamed aluminum sandwich panels by using waste aluminum foam. The waste and old foamed aluminum blocks of any size are degreased, washed and dried, and crushed into 2mm-sized particles, and mixed with 10% (mass percentage) of Zn- Al alloy powder, wherein in the Zn-Al alloy, Zn is 83%, Al is 17%, and the average particle size of the alloy powder is not more than 0.5mm; the aluminum plate A and the aluminum plate B with a length and width of 500mm and 1000mm and a thickness of 2mm are washed After cleaning and drying, put it flat and heat it to 430°C, scrape the surface of aluminum plate A and aluminum plate B repeatedly with Zn-Al solder, and scrape off the excess solder melt on the surface after the solder is spread on aluminum plate A and aluminum plate B for later use; Put the side of the aluminum plate A with the solder melt facing up on the bottom of the mold horizontally, and keep it warm at 450°C for later use; heat the waste aluminum foam pa...

Embodiment 2

[0020] A method for preparing foamed aluminum sandwich panels by using waste aluminum foam, removing oil stains from waste aluminum foam blocks of any size, washing and drying, crushing into 6mm-sized particles, and adding 15% (mass percentage) of Zn- Al alloy powder, wherein in the Zn-Al alloy, Zn is 89%, Al is 11%, and the average particle size of the alloy powder is not more than 0.5mm; the aluminum perforated plate with a length and width of 500mm, 1000mm, and a thickness of 1mm is placed flat and heated to Standby at 450°C; heat the waste aluminum foam particles mixed with Zn-Al alloy powder to 470°C, stir thoroughly for about 30 minutes, quickly pour the foam aluminum particles into a mold covered with aluminum perforated plates, and spread the other An aluminum perforated plate of the same size is stacked downward on the foamed aluminum particle layer; the mold is quickly placed on the vibrating table, and the superimposed composite is rolled and pressed, with a reductio...

Embodiment 3

[0022]A method for preparing foamed aluminum sandwich panels by using waste aluminum foam. The waste and old foamed aluminum blocks of any size are degreased, washed and dried, and crushed into 10mm-sized particles, and mixed with 20% (mass percentage) of Zn- Al alloy powder, in which Zn-Al alloy, Zn is 87%, Al is 13%, the average particle size of alloy powder is not more than 0.5mm; put the aluminum grid plate with length and width of 500mm, 1000mm and thickness of 2mm Heat to 470°C for later use; heat the waste aluminum foam particles mixed with Zn-Al alloy powder to 480°C, stir thoroughly for about 30 minutes, quickly pour the foam aluminum particles into the mold covered with aluminum grid plate A, and after paving Then put another aluminum grid plate B of the same size down on the foamed aluminum particle layer; quickly place the mold on the vibrating table, roll and press the superimposed composite, the reduction coefficient is 1.6, and start the vibrating table at the sa...

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Abstract

The invention relates to a method for preparing a foamed aluminum laminboard by utilizing waste foamed aluminum, which comprises the following steps of: cleaning a waste foamed aluminum block, drying, and crushing into granules of a certain size; adding Zn-Al alloy powder in a certain ratio into the granules, and heating with stirring, so that the Zn-Al alloy powder is molten and coated on the surfaces of the foamed aluminum granules uniformly; heating an aluminum plate, so that laminar brazing filler metal is forced to be coated on the aluminum plate; spreading the foamed aluminum granules on the aluminum plate, and stacking the other aluminum plate of which the surface is coated with the brazing filler metal; and heating and rolling the front side and the rear side of the aluminum plateunder the action of auxiliary vibration, and cooling to obtain the foamed aluminum laminboard. The invention has the advantage that: the foamed aluminum laminboard with permeability can be obtained without a brazing filler metal coating process. The prepared foamed aluminum laminboard has multiple compatible functions of high energy absorption, damping vibration attenuation, sound absorption (sound insulation and noise elimination), filtering, electromagnetic shielding and the like, has the characteristics of light weight and high stiffness, and can be widely used for industrial fields of architectural decoration, transportation and the like.

Description

technical field [0001] The invention relates to a method for preparing a foamed aluminum sandwich panel by utilizing waste and old foamed aluminum, in particular to a recycling technology of waste and old foamed aluminum. Background technique [0002] Aluminum foam is a new type of aluminum-based metal material containing a large number of disordered and evenly distributed closed pores. Combustion, damping and vibration reduction, impact energy absorption and electromagnetic shielding and other functions have realized the light weight and multifunctionality of structural materials, so they have a wide range of application prospects. Industrial production mainly uses the melt foaming method to produce foamed aluminum. This method is to obtain foamed aluminum with certain pore structure characteristics after the aluminum melt undergoes viscosification, foaming and controlled solidification. On the one hand, due to the unbalanced and unstable process in the foaming process, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/02B32B15/20B32B5/18B32B37/24E04B1/86
Inventor 王辉吕昭平吴渊陈国良
Owner 南京国重新金属材料研究院有限公司
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