BOLSTER-ELEVATING DEVICE FOR A PRESS

摘要

Guide posts (10) that guide the elevating motion of a slide (1) in a press machine also serve as the guide means for the elevating motion of a bolster (4). A bolster elevation drive means consists of a hydraulic cylinder (20). The top of the hydraulic cylinder is connected to the bottom of the bolster. For maintenance and inspection of the dies, the bolster is lowered to open a space between the upper die and the lower die. During operation of the press, the bolster is supported by hydraulic pressure trapped in the hydraulic cylinder.