Plastic Injection Molding
Hardening the edges of plastic injection molds is a growing application of laser beam hardening. This is fueled by the desire for an ever-increasing service lifetime of the molds, which can weigh up to ten tons. Laser hardening can also reduce the undesirable burrs on products, which can occur as a result of wear caused by the high injection pressures (ca. 1000 bar) and the use of abrasive media and fillers. Laser hardening of such plastic injection molds is superior over flame or induction hardening because of higher flexibility in dealing with complex shapes and large sizes.