A rotary die-cutter is a machine used in manufacturing to cut materials into specific shapes and sizes. It operates by using a rotating cylindrical die that presses against the material, allowing for precise and efficient cutting. This method is commonly used for materials like paper, cardboard, and plastic. These machines are often employed in industries such as packaging and printing, where high volumes of products are needed. The rotary die-cutter can produce intricate designs and is known for its speed and accuracy, making it a valuable tool in modern production processes.