HIGH-PRESSURE HYDRAULIC PRESS Russian patent published in 1995 - IPC

FIELD: plastic metal working. SUBSTANCE: hydraulic press uses hollow cylindrical bed 1, built in whose lower part are piston 2 and plunger 3 used as a booster, in the lower part provision is made for an opening used for loading and unloading the products, detachable cross-piece 7 with upper die 7, which are actuated by hydraulic cylinders 9. Provision is made for a power cylinder and container 5 with lower die 6. The loading opening is made in the upper plane of the bed and provided with two half-covers 13 installed for reciprocating motion. Cross-piece 7 has a stepped space communicating with the space of container 5 through uniformly spaced ducts and provided with pressure pick-up 10 with buffer 11. The volume of the annular gap between the buffer and upper part of the cross-piece stepped space is not less than the volume of working medium ejected from container 5 during the press working stroke. EFFECT: reduced mass of press and enhanced accuracy of stamping. 2 dwg