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Mingtai Aluminum Shanghai manufacturer introduces common problems in aluminum sheet quality

Date: 2019-05-18 09:33
Shanghai aluminum plate manufacturers say that the common quality problems of aluminum plates, in the production process of aluminum plates, will cause quality problems due to many reasons such as equipment or personnel operation errors. The common quality problems of Mingtai Aluminum are summarized as follows. I hope everyone can pay attention when purchasing. .
 
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, visible to the naked eye during slitting production and finished product inspection. The surface is oily. These oils are mainly caused by the upper and lower rolls at the roll neck or at the exit of the mill, splashing, dripping on the surface of the box, and the abnormality of the rolling mill's roll-cleaning device, and the dripping of the mill's thickness gauge, which is often complicated by dirty components.
 
Shanghai aluminum board manufacturers introduced that this oil stain will bring more harm to the surface of aluminum coil: First, because most of the aluminum coil finished products as decorative or packaging materials, they must have a clean surface; second, their thickness is thin, and it is easy to be used in subsequent annealing. It forms a bubble and affects the use due to the excessive amount of oil forming too much residue there. How much oil defect is a very important indicator for evaluating the quality of aluminum foil.
 
Shanghai aluminum board manufacturers introduce solutions: strictly check the production equipment before production. If it is found that the oil in the equipment is too much, it should be cleaned in time and find the reason. At the same time, the surface of the production products should be cleaned and processed. If the products cannot be cleaned, Oily products are prohibited from entering the market and entering 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 guide roller surface has pointed defects, or stuck with hard debris; the shearing, winding, slitting mechanical guide roller, 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 misalignment between the edges and faces of the object or the surface.
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