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Through hole type microcellular foam aluminum sheet with 0.07 to 0.3mm aperture and preparation method

A technology of microcellular foam and aluminum plate, applied in the field of materials, can solve the problems of particle bonding, agglomeration, inability to produce, etc., and achieve the effect of high yield, improved strength and saving engineering materials.

Inactive Publication Date: 2011-01-26
朱旭
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the particle diameter is less than 0.3 mm, when the oven heating temperature reaches about 400 degrees under the ordinary heating method, the particles will become soft, and bonding and agglomeration will occur between the particles. Solidification, unable to seep, resulting in failure to produce

Method used

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  • Through hole type microcellular foam aluminum sheet with 0.07 to 0.3mm aperture and preparation method
  • Through hole type microcellular foam aluminum sheet with 0.07 to 0.3mm aperture and preparation method
  • Through hole type microcellular foam aluminum sheet with 0.07 to 0.3mm aperture and preparation method

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Embodiment Construction

[0016] The concrete implementation of preparation method of the present invention is described below in conjunction with accompanying drawing:

[0017] 1: Screen the salt grains with the required pore size (diameter 0.07-0.3 mm), such as figure 1 first step;

[0018] 2: Direct heating, using a rotary heating device, rotating while heating, and stirring with a stirrer at the same time, so that the salt particles are in full contact with the hot air, exchanging heat, so that the salt particles do not stick or agglomerate, and the temperature of the salt is heated to 520- between 580 degrees, such as figure 1 second step;

[0019] 3: At the same time, preheat the mold above 200 degrees. Heat aluminum alloy (various aluminum alloys) to over 700 degrees to keep warm, such as figure 1 third step;

[0020] 4: Pour a certain amount of salt particles that have reached the temperature into the mold quickly, and press the initial pressure at about 10KG / square centimeter to flatten; ...

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Abstract

The invention discloses a through hole type microcellular foam aluminum sheet and a preparation method. The microcellular foam aluminum sheet has an aperture of 0.07 to 0.3mm, a void ratio of 45 to 70 percent, a thickness of more than 2mm and a volume weight of 0.8 to 1.5g / cm<3>. The preparation method thereof mainly comprises the following steps of: filtering salt particles, heating, melting aluminium alloy, pouring the salt particles into a mould and pressing initially, pouring into aluminum melt and pressing, cooling, rinsing salt by clean water and the like and finally obtaining the foam aluminum sheet. The invention is mainly characterized in that: in the heating processing, directly heating is adopted without preheating, a revolving heater is adopted to heat while revolving, a mixer is used for mixing and making the salt particles fully contact hot air. The invention has the technical advantages: the foam aluminum sheet having an aperture of 0.07 to 0.3mm has excellent sound absorption performance and greatly improved intensity. In the invention, revolving heating is adopted, so bonding and agglomeration of salt particles with a diameter of 0.07 to 0.7mm when the salt particle is heated to 520 to 580 DEG C are avoided and seepage is completed.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a through-hole microporous aluminum foam plate with a diameter of 0.07-0.3 mm and a preparation method thereof. Background technique [0002] Through-hole foamed aluminum is mainly used as sound-absorbing material, and the most important factors that determine the sound-absorbing performance of foamed aluminum are the range of pore size and the through-hole ratio. At present, the pore diameter of aluminum foam produced by pressurized infiltration method is generally above 0.3 mm, and the sound absorption coefficient is relatively low. Because when the aperture is larger than 0.3 mm, the larger the aperture, the lower the sound absorption coefficient. The invention patent with the application number 00127500.3 can only produce through-hole metal foam with a diameter of 0.3-4.5 mm by this method, and it is still impossible to produce aluminum foam with a pore diamete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00
Inventor 朱旭
Owner 朱旭
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