The slitting machine is applied to cut and
convert different materials such as metal film or papers. Hence, this kind of
equipment is widely used in manufacturing and producing flexible packaging
material. The material is printed and coated in wide, large diameter rolls for
maximum efficiency. The rolls are then slit, using a slitting machine, into
smaller rolls of the size to be used on the packaging machine.
For harder materials, such as sheet metal,
blades cannot be used. Instead a modified form of shearing is used. Two
cylindrical rolls with matching ribs and grooves are used to cut a large roll
into multiple narrower rolls. This continuous production process is very
economical yet precise; usually more precise than most other cutting processes.
However, the occurrence of rough or irregular edges known as burrs are
commonplace on slit edges. Also, the geometry of these rolls is determined by
specific tolerances in addition to the type of material and workpiece
thickness.