The reason for the hidden grooves and knife marks on the surface of hot-rolled aluminum plates

Dark channels,

Will occur from wide to narrow width,

The measures are to change the rolling sequence or replace the rollers as needed.

Knife marks are

Appropriately controlling the speed of the rollers can prevent knife marks from remaining on the surface of the aluminum plate;

When the sand rollers are repaired, the grinding wheel is trimmed to prevent the path marks from occurring on the surface of the aluminum plate.