Solutions to common problems on the surface of aluminium sheets, coils, and strips

Solutions to common problems on the surface of aluminium sheets

In the production process of aluminum sheet and strip, because of equipment or personnel operation errors and other reasons prone to quality problems, here Haomei Aluminum on common quality problems are summarized below, I hope the production department can pay attention to the problem.

Oil stain is a common quality problem: oil stain refers to the rolling of the aluminum tip surface with the most excessive oil. And with the excess oil in addition to the rolling oil film, in the slitting production and finished product inspection process visible to the naked eye on the surface with oil. These oils are mainly from the roll neck or mill outlet on, below the dump, splash, drip on the box surface as well as the mill roller cleaner anomalies, mill thickness measurement head drip oil, etc., and often more dirty composition complex.

This kind of oil stain will bring to the surface of the aluminium coil is more harmful: one is because most of the finished aluminium coil as decoration or packaging materials, must have a clean surface; two is its thickness is thin, in the subsequent annealing easy to form bubble, and because of the amount of oil more in the place to form too much residue and affect the use. The amount of oil defects is a very important indicator for evaluating the quality of aluminium foil.

The solution: check the production equipment rigorously before production, if too much oil is found in the equipment, clean it in time and find the cause, and at the same time clean the surface of the production products, if the products cannot be cleaned off, scrap them and ban them from the warehouse and the market.