Process and apparatus for continuous production of closed-cell aluminum foam with blowing foaming

A technology of closed-cell aluminum foam and blown foam, which is applied in the field of metal material processing, can solve the problems of poor density uniformity of closed-cell aluminum foam, low production efficiency of high-density foam aluminum, and performance differences of aluminum foam with the same density. Accurate and reliable, uniform pore size and controllable density

Active Publication Date: 2012-01-11
ANHUI NEOFOUND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) When other foaming process conditions are constant, the size of the aluminum melt foam can only increase with the increase of the pressure or flow rate of the gas, and cannot be artificially controlled to reduce it, resulting in the preparation of small-pore-diameter high The production efficiency is low when the density is foamed aluminum;
[0008] (2) Due to the inability to produce aluminum melt foam with uniform size, the density uniformity of closed-cell aluminum foam is poor, resulting in significant performance differences of aluminum foam with the same density [R.Edwin Raj, B.S.S.Daniel, Structural and compressive property correlation of closed-cell aluminum foam, J, Alloys Comp., 467(2009) 1-2, 550-556.A.E.Simone, L.J.Gibson, Aluminum foams produced by liquid-state processes.Acta Materialia, 46(1998)9, 3109- 3123.];
[0009] (3) Aluminum foam products cannot be produced according to the predetermined pore size

Method used

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  • Process and apparatus for continuous production of closed-cell aluminum foam with blowing foaming
  • Process and apparatus for continuous production of closed-cell aluminum foam with blowing foaming
  • Process and apparatus for continuous production of closed-cell aluminum foam with blowing foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The aluminum and the aluminum-silicon alloy are melted above 800 DEG C, and when the melting temperature drops to the range of 680-750 DEG C, 0.8-3.5% metal magnesium by mass of the raw material is added and stirred. After the magnesium is completely melted, add 10Vol.% silicon carbide powder, stir well, and then move it into a foaming furnace kept at 600-660°C for foaming. Under the condition that the pressure and flow rate of compressed air are 0.2MPa and 1.5L / min respectively, a single row of horizontal outlet pipes, the diameter of air outlet microholes is 0.25mm and the reciprocating frequency of air outlet microholes is 400rpm, the width and thickness are respectively 1000mm And the density of 18mm closed-cell foam aluminum plate is 0.18g / cm 3 , The continuous production speed is 220mm / min.

Embodiment 2

[0054] The addition of metal magnesium is 1.0~3.0% of the raw material quality, the addition of silicon carbide powder is 12Vol.%, the flow rate of changing the compressed air is 3.0L / min, and the double row of horizontal air outlet pipes, other conditions are the same as in Example 1, and the width and The density of closed-cell foamed aluminum plates with thicknesses of 1000mm and 18mm is 0.18g / cm 3 , The continuous production speed is 450mm / min.

Embodiment 3

[0056] The addition of metal magnesium is 1.0 to 2.5% of the raw material quality, the addition of silicon carbide powder is 15Vol.%, and the pressure of the compressed air is changed to 0.3MPa. Other conditions are the same as in Example 2, and the width and thickness are respectively 1000mm and 18mm. The density of the porous aluminum foam board is 0.17g / cm 3 , The continuous production speed is 550mm / min.

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Abstract

The invention relates to a process and an apparatus for continuous production of a closed-cell aluminum foam through blowing foaming. The process comprises the following steps: melting a raw material, adding with a ceramic tackifier and a moistening promoter, stirring to obtain molten aluminum with uniform component, carrying out continuous foaming with the apparatus for the continuous productionof the closed-cell aluminum foam with blowing foaming to obtain a molten aluminum foam with uniform foam size, and controllable density and productivity, and producing a foamed aluminum board by going through a net belt and transmitting with an arc transition mechanism and cutting. The apparatus is characterized in that: a simple crank link mechanism is adopted to realize the reciprocating motion of a horizontal outlet duct, and the arc transition mechanism allows the ascending lifting of the molten aluminum foam to be changed into horizontal transmission. According to the invention, the process and the apparatus are simple, the operation control is accurate, and a purpose that the pore size and the density of foamed aluminum products can be accurately controlled at a high efficiency anda low cost is realized because the foam size of the molten aluminum is adjusted by changing the frequency of the reciprocating motion of the outlet duct, the pressure and the flow of a compressed gasand the diameter of outlet micropores.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a method and equipment for continuously producing closed-cell foamed aluminum by a melt-gas foaming method. Background technique [0002] Closed-cell aluminum foam is a new type of structural functional material, which exhibits special physical, chemical and mechanical properties and recyclability with a unique structure. As a structural material, it has the characteristics of light weight and high specific strength; as a functional material, it also has various physical properties such as sound absorption, sound insulation, heat insulation, flame retardancy, shock absorption, damping, impact energy absorption, and electromagnetic shielding. . Therefore, it is widely used in metallurgy, machinery, transportation, aerospace, chemical industry, electronic communication, construction, armament and automobile and other fields. [0003] The commonly used methods for preparin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00
Inventor 王德庆
Owner ANHUI NEOFOUND TECH
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