1. air strips and slag inclusions
Causes: The production process is not strictly followed (the refining is not timely), the degassing outside the furnace is not in place (the dust collector leaks), the aluminum sewage treatment is not timely, the excessive effect is not obvious, and the gas humidity is high.
Improvement measures: Carry out one-time feeding, spread covering agent according to actual operating processing technology, strengthen refinement, deal with air leakage problems in dust collectors, clean aluminum sewage treatment, improve the filtration system, and ensure the passage of aluminum water.
2. Long and small cracks
Cause: Rolling may cause damage or damage to the nozzle skin
Improvement measures: If the above problems occur with the nozzle skin, the board should be broken immediately to ensure that the nozzle skin is intact during the production process.
3. Black border
Causes: Possible shortcomings of rolling: the processing technology is not timely, and the treatment of aluminum sewage is not good.
Improvement measures: Develop production processes and strengthen aluminum wastewater treatment.
4. Scratches
Cause: Rolling may be caused by the friction between the countertop of the hydraulic shearing machine and the surface of the aluminum alloy plate.
Improvement measures: Rectify the lower counter of the hydraulic shearing machine.
