Aluminum foil double-rolled, the appearance of the aluminum foil on the dark side of the uneven shiny point called the bright spot.
The main reason for the combination of oil film strength is insufficient, or because the roller roll uneven uneven rolling caused by uneven deformation, the appearance of Ma skin or foreign matter into the shape.
Choose a reasonable double oil, keep the surface cleaning and roller roll surface roughness is an effective measure to solve such defects.
It is also necessary to use a reasonable rolling reduction and to select an excellent foil blank.
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