Knowledge

In the production process of aluminum strip, because of equipment or personnel operation errors and other reasons prone to quality problems, here on the common quality problems summarized as follows, I hope that the production department can pay attention to this issue. Oil pollution is a common quality problem: Oil is the most oily aluminum tip surface after rolling. And with the addition of rolling oil film outside the excess oil, in the cutting production and finished product inspection process visible to the naked surface with oil.

These oils are mainly caused by roller neck or rolling mill outlet, bottom dump, splash, drip on the box surface, as well as the mill roller cleaning device abnormal, rolling mill measurement of thick head drops, and often more complex than dirty components. This oil pollution will bring greater harm to the surface of aluminum coil: First, because most of the finished aluminum coil as decorative or packaging materials, must have a clean surface, the second is its thin thickness, in the subsequent annealing easy to form bubble shape, and because the amount of oil more in the place to form too much residue and affect the use.

Oil pollution defects are more or less a very important index to evaluate the quality of aluminum foil.

Solution: Before the production of strict inspection of production equipment, if found in the equipment too much oil to clean in time and find the cause, at the same time the production of products for surface cleaning processing, if not cleaned products to do scrap treatment, oily products are prohibited from warehousing and into the market. Scratches are frequent visitors to quality problems: scratches, bruises, and bumps are intermittent or continuous on the surface of the aluminum plate. A single groove scar.

It is generally produced when the sharp object is in relative sliding after contact with the surface of the foil. The main reasons for this: roll, guide roller surface has sharp defects, or sticky hard debris, shear, winding, cutting mechanical guide Roller, Guide road has sharp defects or withered debris. Scratch: A scar of a bundles (or group) distribution on the surface of a box due to a relative sliding or staggered between the edges and surfaces of an object, or the surface after contact with the surface.