Spliced type large-specification foam aluminum plate and machining method thereof

[0027] Example 1

[0028] like figure 1 , figure 2 As shown, an assembled large-sized aluminum foam board is formed by splicing a plurality of foamed aluminum boards 10 of specified size through connectors (steel pins) 12. On the side of the foamed aluminum board 10, the A hole 11 is drilled in the axial direction. When two foam aluminum sheets 10 are connected, the connecting piece 12 is inserted into the corresponding hole 11 of the foam aluminum sheet 10, thereby connecting the two sheets together to play a reinforcing role, so that the foam The overall strength of the aluminum plate 10 is enhanced. The joints between the two aluminum foam plates 10 are filled with adhesive to provide overall strength and sealing performance.

[0029] Example 2

[0030] like figure 1 , figure 2 As shown, an assembled large-sized aluminum foam board is formed by splicing a plurality of foamed aluminum boards 10 of specified size through connectors (steel pins) 12. On the side of the foamed aluminum board 10, the A hole 11 is drilled in the axial direction. When two foam aluminum sheets 10 are connected, the connecting piece 12 is inserted into the corresponding hole 11 of the foam aluminum sheet 10, thereby connecting the two sheets together to play a reinforcing role, so that the foam The overall strength of the aluminum plate 10 is enhanced. The joints between the two aluminum foam plates 10 are filled with adhesive to provide overall strength and sealing performance. Ceramic balls are arranged inside the foamed aluminum plate 10 , and the ceramic balls are sealed inside the foamed aluminum plate 10 , and the ceramic balls are not in contact with each other. The ceramic balls are added during the foaming process of the foamed aluminum sheet 10, foamed together with the foamed aluminum, and wrapped by the foamed aluminum; the ceramic balls are added to the foamed aluminum as a filling material to reduce the weight of the sheet and greatly reduce the cost. The above-mentioned ceramic balls are lightweight foamed ceramic balls with a particle size of 0.1-3 cm. The ceramic balls are low in cost and light in weight. The plates made of them have good energy absorption effect and high overall strength. The thickness of the above-mentioned aluminum foam board is about 4cm, which can be directly used as a wall board, while the thickness of the traditional non-load-bearing wall is about 24cm. Using the above-mentioned board can increase the usable area of ​​the room.

[0031] The processing method of the above-mentioned aluminum foam sheet is as follows:

[0032] (1) After adding the molten aluminum into the foaming agent, it is introduced into the foaming mold;

[0033] (2) Cool the ceramic ball to normal temperature (for a long time), and then heat it rapidly to increase the surface temperature of the ceramic ball, which is preferably close to the temperature of the molten metal; the ceramic ball is heated rapidly, because the ceramic ball has a cavity inside, so that The surface temperature is high and the internal temperature is low, which realizes rapid cooling of the metal foam body (internal cooling technology) and prevents the uneven problem of more foaming on the top and less foaming on the bottom caused by the upward movement of bubbles;

[0034] (3) Use a bottomless metal mesh basket (for easy exhaust), turn it upside down and fill it with ceramic balls, seal the bottom with a plastic rope net, turn it upside down again, press the basket into the foaming mold, and use the conventional method. Soak, just take out the basket when it is semi-solidified; or directly sprinkle the ceramic balls into the molten aluminum, and stir with a stirring device to suspend the ceramic balls in the molten aluminum;

[0035] After the plastic rope net contacts with the molten metal, it melts and disappears at high temperature, and the ceramic balls are pressed into the molten metal. The ceramic balls are in contact with each other and arranged evenly, maximizing the amount of ceramic balls, reducing the amount of foamed aluminum, and reducing costs;

[0036] (4) After cooling, take out the metal plate that has been foamed in the mold to obtain a foamed metal plate.

[0037] The above-mentioned metal mesh basket is pressed into the molten metal by external pressure.

[0038] The volume ratio of the molten metal to the ceramic ball is 35:65, which can achieve the best performance and economical performance.

[0039] The heating method of the above-mentioned ceramic balls is direct heating by fire method or feeding into electric heating equipment for heating.

[0040] The foamed aluminum material produced by the process of the present invention is processed into a 10mm thick plate. After testing, the energy absorption density: 20-26J/cm 3;Strength: ≥10Mpa; Noise reduction coefficient NRC 0.8 or more (noise reduction coefficient of foamed aluminum sheet 0.6).