Firstly, the production process for coated aluminium foil requires a good board shape, which is a prerequisite for the production of coated aluminium foil.
The unit of measurement for board shape is I. Generally, coating equipment requires a board shape within 20-40 I. If this value is greater, a tension straightening system must be added before the coating equipment. Generally, coating equipment has a long running route for the aluminium strip and a large number of handling processes and guide rollers. Therefore, if a tension straightening system is not provided, it is easy to fold the foil during operation in the event of a bad board shape, making production impossible. The production of air conditioners also places high demands on the shape of the aluminium foil. In general, heat exchanger blanking lines use the vacuum suction method for aluminium foil transfer. If the aluminium foil has a bad board shape and an uneven surface, the vacuum suction method for aluminium foil cannot be carried out properly.
The board shape is therefore an important technical indicator not only for coated aluminium foil but also for uncoated aluminium foil.
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