In the manufacturing process of aluminum strips, quality problems are prone to occur due to equipment or personnel failures. The common quality problems in the aluminum industry are summarized below. It is hoped that the manufacturing department will pay attention to this problem. Oil stains are common in quality problems: oil stains refer to the most excessive oil on the surface of the aluminum tip after rolling, and carry excess oil other than the rolling oil film, which is visible to the naked eye during the slitting manufacturing and finished product inspection. The surface is oily. These oils are mainly caused by the upper or lower of the roll neck or the exit of the mill, the splashing, dripping on the surface of the box, and the abnormality of the rolling mill's clearing roller, and the dripping of the mill's thickness gauge, which is often complicated by dirty components. This kind of oil stain will bring great harm to the surface of the aluminum coil: First, since the aluminum coil finished product is mostly used as a decoration or packaging material, it must have a clean surface, and the thickness thereof is thin, and it is easy to form a bubble shape in the subsequent annealing, and Due to the large amount of oil, too much residue is formed there to affect the use. How much oil defect is a very important indicator for evaluating the quality of aluminum foil. Solution: Strictly check the manufacturing equipment before manufacturing. If it is found that there is too much oil in the equipment, it should be cleaned and found in time. At the same time, the surface of the manufactured product should be cleaned. If the product cannot be cleaned, the oily product will be discarded. It is forbidden to enter the warehouse and enter the market. Scratch is a frequent visitor to quality problems: scratches, abrasions, and bruises are intermittent or continuous surfaces of aluminum sheets. Single groove-like scars. It is generally produced when the sharp object slides in contact with the surface of the foil. The main reasons are: the roll, the surface of the guide roller has pointed defects, or the mechanical guide roller with the hard material shearing, winding and slitting, the guide path has pointed defects or dry debris. Scratch: A bundle (or group) distribution of scratches on the surface of a box due to the relative sliding or dislocation of the edge or surface between the objects.
