Die and Punch
Die and punch sets can be used for thicker materials or materials that require large holes; this process is the most common for metalworking. The workpiece is sheared by pressing (either by machine or hand tool) the punch through the workpiece and into the die. The middle section of the workpiece is scrap; commonly known as the chad in paper and similar materials. The punch and die are shaped to produce the desired shaped hole. The clearance (the distance between the outside circumference of the punch and the inner circumference of the die) must be properly maintained to ensure a clean cut. Burrs are produced on the side of the workpiece that is against the die.
Common applications are fruit and vegetable bags, hole punching and ticket punching.
Read more about this topic: Perforation, Processes
Famous quotes containing the words die and/or punch:
“No man dies for what he knows to be true. Men die for what they want to be true, for what some terror in their hearts tells them is not true.”
—Oscar Wilde (1854–1900)
“At least the Pilgrim Fathers used to shoot Indians: the Pilgrim Children merely punch time clocks.”
—E.E. (Edward Estlin)