Process for preparing through-hole foam aluminium plate

Abstract

The invention relates to a method for preparing porous foam aluminum sheet. Wherein, it selects aluminum alloy to be heated via smelting furnace at constant temperature; selects food particle salt as foam porous stuff to be baked at high temperature and constant temperature; adds heated particle salt into mould, to be pressurized by compressor into block; adds melt aluminum to be pressurized by compressor, to make the melt aluminum into the space between particle salts, to form compact foam aluminum skeleton; then solidifies it to be extracted out from the mould to be cooled. The produced porous foam aluminum plate has uniform factor of porosity, with high porous rate, stable structure, adjustable thickness, improved quality, reduced producing cost and the application for batch production.

Description

1. Technical field: [0001] The production process of the through-hole foamed aluminum sheet of the present invention relates to the technical field of foamed aluminum sheet manufacturing, in particular to a porosity of 80-90%, a through-hole ratio of 85-90%, a main pore diameter of 0.4-2.5mm, and a density of 0.5-1g / cm 3 The through-hole preparation process of the through-hole aluminum foam sheet. 2. Background technology: [0002] At present, porous through-hole metal foam aluminum has a good prospect in the market application. It is widely used in the field of acoustics (sound absorption and noise reduction), such as: concert halls, theaters, dance halls, gymnasiums, conference centers, road sound barriers, power generation Machine room, air compressor room, ship engine room. Noise reduction for air conditioning and ventilation equipment, etc. [0003] The research on porous through-hole foamed aluminum materials has been going on for more than 50 years since the 1960s...

AI Technical Summary

Problems solved by technology

[0003] The research on porous through-hole foamed aluminum materials has been going on for more than 50 years since the 1960s. At first, it was: 1) Foaming method: Due to the difficulty in controlling the production process of the foaming method and the large investment, the development of foamed metal materials is limited.

2) Sintering method: Due to the small pore size, thin plate, low mechanical strength, uniformity and porosity are difficult to control, so the manufacturing cost is high, resulting in increased sales costs, and the market application is more difficult

There are obvious defects in the above methods: a. Foaming process preparation method is difficult to control process conditions, equipment investment is large, and product cost is high. At present, large-scale production cannot be carried out

b. Sintering process preparation method, the uniformity of pore size and porosity of the produced products has great uncertainty, low mechanical strength, low yield, and high product cost

c. Seepage casting preparation method ① Due to the difficulty in controlling the thermal expansion coefficient when the particles are solidified at high temperature, it cannot be put into the mold when the temperature is high, and the solidified particles are broken when the temperature is low. The aluminum water pouring is uneven

② When removing the solidified particles, the solidified particles cannot be eliminated cleanly, causing the product to swell and form waste products, and it is impossible to produce large-scale and large-scale production