Diameter-change over-stow force-expansion oil cylinder switching device

• Main Authors: YE JINRUI, ZHI RUIXIU, HAN YUMING, QIU YUANZHONG, WU HAO
• Format: Patent
• Language: Chinese; English
• Published: 16.03.2011
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The utility model discloses a diameter-change over-stow force-expansion oil cylinder switching device, which includes a cross bar (1), a pull rod (2), a power oil cylinder (3), and an oil cylinder seat (4), a short-travel large-diameter flat oil cylinder (19) is connected between a piston rod (10) of the power oil cylinder (3) and the cross bar (1), a piston rod (14) of the short-travel large-diameter flat oil cylinder (19) is connected with the piston rod (10) of the power oil cylinder (3), and a blind hole end cover (11) of the short-travel large-diameter flat oil cylinder (19) is connected with the cross bar (1). The diameter-change over-stow force-expansion oil cylinder switching device is convenient in manufacturing, installation and use, and used in a technology of core-pulling de-molding casting of a metal mold, so that waste of shut down caused by locked mold core of the metal mold is reduced, resource is saved, work efficiency is improved, and beneficial conditions are provided for normal and continu