Waste-material detachment from stamped sheets - involves forming weakened point in waste portion during stamping operation at which breaker pins are aimed

摘要

Several breaker pins (12) may be lowered onto the waste portions to be detached from the metal sheet. One or more weakened portions (26) are formed in each portion during the stamping operation, and the pins are aimed at these points. Each weakened point may consist of a hole into which a short end boss (30) fits. Each boss is mounted on a flat end face (28) of a pin, and is of smaller dia. than the pin. The sheet is supported on an anvil or bottom plate (14) with apertures matching the portions to be removed but of slightly smaller dia. than them. USE/ADVANTAGE - Simple and reliable stamping mechanism ensuring ejection of waste pieces from sheet.