Foil rolling is a specific type of flat rolling, particularly used for making foil, which is sheet metal with a thickness lesser than 200 µm (0.0079 in). The rolling is done in a cluster mill as the small thickness needs a small diameter rolls. To lessen the need for small rolls; pack rolling methodology is used, which rolls multiple sheets together to increase the effective starting thickness. As the foil sheets come through the rollers, they are trimmed and slit with circular or razor like knives. Trimming refers to the edges of the foil, whereas slitting entails cutting it into quite a lot of sheets. Aluminum foil is the most usually produced product by means of pack rolling. This is apparent from the two different surface finishes; the dull side is against the other sheet of foil and the shiny side is on the roll side.
Flat rolling is the most fundamental form of rolling with the starting and ending material having a rectangular cross-section. The material is fed in between two rollers, called working rolls which rotate in opposite directions. The gap between the two rolls is lesser than the width of the starting material that causes it to deform. The decrease in material thickness causes the material to elongate. The friction at the interface between the material and the rolls causes the material to be pushed through.
Flat Rolled Aluminum Coil is a result of the rolling process. And in the rolling process, flat rolling is utilized for producing flat rolled aluminum coil. Flat rolling is a process which is mostly used for giving the best product. Aluminum coil be rolled through cold rolling and hot rolling process as well. Depending upon the end product the industry wish to avail, the rolling process is selected by the industry professionals.