One, check the outer packing of the aluminum plate. Good packaging not only shows the strength of the aluminum plate manufacturer, but also pays for the product package, and it also shows that the manufacturers attach much importance to product protection. In addition, it is also shown that the manufacturer is very effective in the management of the aluminum plate production.
Two, look at the surface of the aluminum plate. Good aluminum, surface roller, black spots, scratches, grease, corrosion, fission and other defects; flat plate, no bending sheet aluminum; diagonal consistent; the whole plate neatly, each plate length and width consistent. If the surface of the aluminum plate is covered with a protective film, the protective film will be opened and at least the width of the plate is looked at at least to avoid the defects being covered.
Three, measured with micrometer, vernier caliper, meter measuring tools. According to the demand, select the products provided by aluminum plate manufacturers to evaluate. According to the size of the measured size, different measuring tools are selected to measure the thickness, width, length, roughness and diagonal line of the aluminum plate. The specific size deviation can be referred to GB/T 3880. 1-2006. At least three points are selected for each measurement to measure the size or error of the aluminum plate or whether it is within the national standard.
Four, the aluminum plate manufacturer is required to provide the certificate of qualification for the material of the aluminum plate. A good aluminum manufacturer will test the composition and performance of each batch of aluminum plate. After the aluminum plate manufacturer provides the material qualification certificate, check whether the ingredients and properties of the material correspond to the national standard. The specific value can be referred to GB/T 3880-2006. And pay attention to the material sheet must be stamped with the manufacturer's official seal. If there is a problem in the process of using the aluminum plate, the material can be used as the basis for the inspection of the aluminum plate, and the quality objection is put forward by the manufacturer.
Five, the after-sales service of the manufacturer. How to understand the after-sales service of the manufacturers, if the problem can be solved in time, this can be more worried.