Rotary die cutting

The rotary die is classified as a competitive method of the Hubstanzens. In rotary punching, the material is separated by rotating the tools and not by moving the tools in a straight line. The process is also classified in group 3 cutting according to DIN 8580 .

The construction of a rotary punch as a male / female version essentially consists of a housing, a pair of shafts, gears and the tool carrier rings. The components of a rotary punch that enable the main function are the round tool carrier rings and the tools they contain, the dies and punches . The tool rings sit on the tool shafts, which are driven. The tool shafts are synchronized by a gear and therefore fixed in their angular position to one another. They rotate in opposite directions based on the relative movement of the tool rings to one another. In relation to the material to be processed, the tool rings move in the same direction. By fixing or coupling the tool shafts through the gearbox, it can be ensured that each punch runs into the die provided and, moreover, that the cutting clearance at the cutting edges across and parallel to the direction of material travel is always the required or intended dimension.

The strip-shaped starting material is fed between the punch ring and the die ring and is thus exposed to rotary processing by the actual tools, punches and dies. The number and design of the tools used depends on the product. With the appropriate design of the tools, the punch punches the material in interaction with the associated die. The slug is pressed through the die and removed from the cutting zone when the slug falls.

The punched material is then fed to further processing, such as roll forming .

The machines further developed by Baust enable endless material such as metal, plastic and paper to be processed in a rotary manner.