Stripper Plate

The stripper plate is a critical component in progressive die sets used in metal stamping processes. It serves multiple functions: stripping stamped parts from punches after forming, guiding the strip material through the die stations, and providing precise alignment for punches and dies. Typically mounted between the punch holder and die block, it contains clearance holes for punches and may incorporate springs or nitrogen cylinders to apply stripping force. Its design ensures proper material flow, prevents part distortion during ejection, and maintains dimensional accuracy throughout high-volume production runs.

The stripper plate operates on mechanical and hydraulic principles. During the stamping cycle, as the press ram descends, punches penetrate the material through clearance holes in the stripper plate. After forming, the press ram retracts, and springs or nitrogen cylinders behind the stripper plate apply upward force, separating the material from the punches. This stripping action prevents material from sticking to punches while maintaining precise alignment for subsequent operations. The plate also guides the material strip through pilot pins or sensors, ensuring accurate progression through multiple die stations.