Industrial aluminum foil for air conditioner

  The main application scope of the industrial aluminum foil falls on cooling fins of air conditioners. The main alloys of air conditioner foil are 1100, 1200, 8011, 3102 etc. The main chemical composition for air conditioner foil produced by hot rolling billet or cast rolling stock shall comply with the provisions of GB 3190-2008. But in the production, the actual control range of different manufacturers is different. The control range of chemical composition mainly considers the technical indicators such as tensile strength, elongation and cupping value of products to meet the requirements of users.

Industrial aluminum foil for air conditioner

  Surface quality requirements of aluminum foil for air conditioning

  The surface of aluminum foil should be flat and clean, and there are no defects such as corrosion, holes, folding, brown oil spots, slit, etc. 0 state aluminum foil, surface brush water test should not be lower than grade B.

  Thickness of aluminum foil for air conditioner

  At present, the thickness of air-conditioning aluminum box is generally 0.10-0.12mm, and there is a trend of thinning to 0.090 mm.

  Requirements for tensile strength, elongation and cupping value of aluminum joint in air conditioner

  There are generally two forming methods for the heat sink fins of air conditioner: one is the drawing forming method, which requires the air conditioner foil with large deep drawing capacity. Due to the low tensile strength, the thickness of aluminum box is relatively thick, generally more than 0.11mm; The other is the thinning drawing method, which has a faster forming speed and a thickness of less than 0.11 mm, which requires not only a certain plasticity but also a high strength of aluminum foil. In other words, different forming methods have different performance requirements for air-conditioning aluminum foil. According to the market demand for air-conditioning aluminium foil, it is required to meet the forming process of stretch forming and stretch thinning forming at the same time. It is generally hoped to obtain H22 aluminum foil for air conditioning. The tensile strength is 120-130mpa, the elongation is more than 18%, and the cupping value is more than 6mm.

What are the processes of aluminium foil for air conditioning

There are two processes for aluminium foil for air conditioning:

(1) Cast rolling -cold rolling trimming -cold rolling -box rolling slitting- finished product annealing -packaging.

(2) Ingot -homogenization annealing -hot rolling -cold rolling- trimming cold rolling -box rolling slitting -finished product annealing -packaging.

Aluminum foil can be divided into industrial aluminum foil and packaging aluminum foil. The chemical composition of industrial aluminium foil is relatively pure, and its thickness is 0.005-0.2 mm. It is mainly used as capacitors, insulation materials and moisture-proof materials in electrical and electronic industries. The thickness of packing aluminium foil is generally 0.007-0.1 mm. There are many kinds of products, such as flat foil, printing foil, colored printing foil and laminated foil. They are mainly used as packaging materials for food, tea, cigarettes, etc.

The smaller thickness and width of aluminium foil produced by belt production method can reach 0.0025 mm and 1800 mm respectively.

Aluminum foil rolling is seamless rolling, and the rolls are always in the state of elastic flattening. During rolling, the thickness of alu foil can be controlled by adjusting rolling force, rolling speed and tension. In rough rolling, the thickness ofalu foil is controlled by rolling force; in finishing rolling, the alu foil thickness decreases with the increase of rolling speed; the greater the tension, the smaller the thickness; in order to prevent fragmentation, the tension is usually chosen as 0.2-0.4 of standard yield strength_0.2 of foil.

In low-speed rolling, the “thick oil-a00 aluminium plate rdquo” is often added to lubricating oil, or “thin oil” is used to adjust the rolling thickness of aluminium foil. Lubricant and roll condition have a very important influence on aluminium sheet foil quality.

Aluminum foil billet comes from cold rolled aluminium coil. It is generally pre-annealed at 340-480 C, and its thickness is 0.4-0.7mm. The pass deformation rate is about 50% and the total deformation rate is over 95%. The foil whose finished thickness is less than 0.01-0.02 mm should be rolled and rolled in double sheets.