Common aluminium coil quality problems and causes

2022-12-13

Aluminium coils are thin strips of pure aluminium or aluminium alloy pressed into a product. In the production process of aluminium coil, because of improper operation, some quality problems often occur. Some of these problems can lead to unusable aluminium coils, which can cause serious losses. Here we talk about the common quality problems of aluminium coils and their causes. In this way, we can make remedies through the causes, so as to minimize the loss.

One, air strip and slagging

In the casting and rolling on the possible causes: aluminum coil production process is not strictly enforced (refining is not in place), outside the furnace to remove gas is not in place (in addition to gas box leakage), aluminum water treatment is not in place, the role of filtration is not obvious (filter box can not be used properly), air moisture is too heavy.

Corrective measures: one-time feeding, sprinkle covering agent according to the operation process, strengthen refining, solve the problem of air leakage from the de-gassing box, clean aluminium water treatment, increase the filtering device to ensure that the aluminium water is filtered.

Two, small cracks in long strips

Casting and rolling on the possible causes: damage or damage to the masticatory skin of the aluminium coil

Corrective measures: the above problems exist in the masticatory skin immediately break the plate, to ensure that the production of masticatory skin intact.

Three, black strip

Casting and rolling on the possible problems: aluminum coil processing technology is not implemented in place, aluminum water treatment is not good.

Corrective measures: the development of production processes, to strengthen the aluminum water treatment.

Four, rubbing scratches

Casting and rolling possible causes: shearing machine under the table abrasion aluminum coil surface caused.

Rectification measures: rectification of the shearing machine under the table surface.