Reducing piled force-expanding type oil cylinder opening-closing device and using method thereof

• Main Authors: YE JINRUI, ZHI RUIXIU, HAN YUMING, QIU YUANZHONG, WU HAO
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2011
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention relates to a reducing piled force-expanding type oil cylinder opening-closing device. In the invention, a short-stroke large-cylinder-diameter flat oil cylinder is connected between a piston rod and a cross arm of a power oil cylinder, wherein the piston rod of the flat oil cylinder is connected with the piston rod of the power oil cylinder, and a close hole end cover of the flat oil cylinder is connected with the cross arm. The using method comprises the following steps of: filling hydraulic oil into an inlet-outlet oil hole of a piston cavity of the flat oil cylinder to ensure that oil enters the piston cavity and the piston rod is in a fixed state; acting on the close hole end cover of the flat oil cylinder by the piston cavity after the oil enters the piston cavity to ensure that the close hole end cover pushes the cross arm and a pull rod pulls a metal die core, wherein because the sectional area of the piston cavity of the flat oil cylinder is an odd number times that of the piston cavity