Poor production supervision, equipment malfunctions, and incorrect operation can all lead to quality issues with aluminum coils. The occurrence of quality problems affects the product quality of the aluminum coil production plant, causing economic losses. Therefore, when quality issues arise, they should be promptly resolved. So, what quality issues will aluminum coils encounter after production
1、 Air strip and slag inclusion
Possible reasons for this during casting and rolling include not strictly implementing the production process (inadequate refining), inadequate degassing outside the furnace (leakage from the degassing box), inadequate aluminum water treatment, unclear filtration effect (the filter box cannot be used normally), and excessive air moisture.
Rectification measures: Conduct one-time feeding, apply covering agent according to the operating process, strengthen refining, solve the problem of air leakage in the degassing box, clean the aluminum water, and add filtering devices to ensure that the aluminum water is filtered.
2、 Elongated small fissure
Possible causes on casting and rolling: nozzle skin damage or damage
Rectification measures: If there are any of the above issues with the nozzle skin, immediately break the board to ensure that the nozzle skin is intact during production.
3、 Black stripe
Possible problems in casting and rolling: the process is not executed properly, and the aluminum water treatment is not good.
Rectification measures: Develop production processes and strengthen aluminum water treatment.
4、 Scratch
Possible cause of casting and rolling: friction between the lower table of the shearing machine and the surface of the aluminum plate.
Rectification measures: Rectify the lower table of the shearing machine.