Rotary die cutting is die cutting using a cylindrical die on a rotary press. A long sheet or web of material will be fed through the press into an area known as a “station” which holds a rotary tool that will cut out shapes, make perforations or creases, or even cut the sheet or web into smaller parts. A series of gears will force the die to rotate at the same speed as the rest of the press, ensuring that any cuts the die makes line up with the printing on the material. The machines used for this process can incorporate multiple “stations” that die cut a particular shape in the material. In each of these stations lie one or more of these geared tools or printing cylinders, and our machines use automatic eye registration to make sure the cuts and/or printing are lined up with one another when lower tolerances are required.
Dies used in rotary die cutting are either solid engraved dies, adjustable dies, or magnetic plate tooling. Engraved dies have a much higher tolerance and are machined out of a solid steel bar normally made out of tool steel. Adjustable dies have removable blades that can be easily replaced with other blades, either due to wear or to cut a different material, while magnetic plate tooling has a cylinder that has magnets placed in it, and an engraved metal plate is attached or wrapped around the base cylinder holding onto it by the force of the magnets.