What are the common quality problems of aluminum plates?

In the manufacturing process of aluminum strip, quality problems are prone to occur due to equipment or personnel failures. Common quality problems in the aluminum industry are summarized below.

I hope the manufacturing department can pay attention to this problem. Oil stains are very common in quality issues: oil stains refer to the excessive amount of oil on the surface of the aluminum tip after rolling, and there is excess oil in addition to the rolling oil film, which is visible to the naked eye during the cutting manufacturing process and has been completed. Product inspection. The surface is greasy. These oils are mainly caused by the upper or lower part of the roll neck or the outlet of the mill, splashing, dripping on the surface of the box, as well as anomalies in the mill cleaning rolls and dripping of the mill thickness gauge. This is often complicated by dirty components.

This oil will cause great harm to the surface of the aluminum coil: First of all, because the finished aluminum coil is mainly used as a decorative or packaging material, it must have a clean surface, and its thickness is thin, it is easy to form a bubble shape in the subsequent annealing, and because of a large amount of oil, too much residue is formed there and affects the use. How much oil is an important indicator to evaluate the quality of aluminum foil.

Solution: Strictly inspect the manufacturing equipment before manufacturing. If too much oil is found in the equipment, it should be cleaned and found in time. At the same time, the surface of the finished product should be cleaned. If the product cannot be cleaned, the oily product will be discarded. Forbidden to enter the warehouse to enter the market. Scratches are a common visitor to quality problems: Scratches, scrapes and bruises are intermittent or continuous surfaces of aluminum sheets. Single furrow scar. It is usually produced when a sharp object slides into contact with the foil surface.

The main reasons are: rolling, pointed defects on the surface of the guide roller, or mechanical guide roller shear, winding and slitter with hard materials, pointed defects or dry debris on the guide rail. Scratches: Distribution of scratches (or groups) on the surface of a box due to relative sliding or misalignment of edges or surfaces between objects.