The invention relates to a hydraulic press and a method of pressing different kinds of objects, such as briquettes. The hydraulic press comprises a body cylinder (1) housing a fluid space (2) and a working piston (3) whose rod (3a) extends to the outside of the body cylinder (1), the working piston (3) being adapted to be moved in the fluid space (2) by hydraulic pressure. The hydraulic press also comprises a pressure accumulator (4) as well as a hydraulic circuit with valves. Inside the working piston (7) moved by hydraulic pressure, a striking piston (7) moving along with the working piston (3) and quickly movable relative to the working piston (3) by means of hydraulic pressure, is provided. In addition, a separate impact body (10) is provided between the striking piston (7) and the object (14) pressed by the hydraulic press.

The invention relates to a hydraulic press and a method of pressing different kinds of objects, such as briquettes. The hydraulic press comprises a body cylinder (1) housing a fluid space (2) and a working piston (3) whose rod (3a) extends to the outside of the body cylinder (1), the working piston (3) being adapted to be moved in the fluid space (2) by hydraulic pressure. The hydraulic press also comprises a pressure accumulator (4) as well as a hydraulic circuit with valves. Inside the working piston (7) moved by hydraulic pressure, a striking piston (7) moving along with the working piston (3) and quickly movable relative to the working piston (3) by means of hydraulic pressure, is provided. In addition, a separate impact body (10) is provided between the striking piston (7) and the object (14) pressed by the hydraulic press.

An electro-hydrostatic drive for realizing a rapid movement and a force-building movement, comprising a hydro-machine with variable volume and/or rotational speed, driven by an electric motor, for providing a volume-flow of a hydraulic fluid, a first cylinder with a housing, a piston, a cylinder rod, and a first and a second cylinder chamber, a second cylinder with a piston, a cylinder rod, and a first and a second cylinder chamber, a moveable carrier plate, a pillar, and a clamping apparatus to clamp and/or unclamp the first cylinder to the pillar, where the hydraulic drive has a closed hydraulic circuit, which has, when run, a positive pressure above atmospheric pressure and which, by utilizing the hydro-machine, can pressurize either the first or the second cylinder chamber of the first cylinder and/or the first or the second cylinder chamber of the second cylinder. The moveable carrier plate is connected both to the first cylinder and to the second cylinder. For the force-building movement, the first cylinder is clamped, by the clamping apparatus, to the pillar and one cylinder chamber of the first cylinder is pressurized with the hydraulic fluid, and for the rapid movement, the first cylinder is unclamped, by the clamping apparatus, from the pillar and one cylinder chamber of the second cylinder is pressurized with the hydraulic fluid.

An apparatus for the controlled return of the stems in cylinders of the types that can be applied to a press for stamping sheet metal, comprising: at least one fluid-operated cylinder), at least one hydraulic accumulator which is fluidically connected to the at least one cylinder by means of a hydraulic circuit which comprises: a duct for the discharge of the working fluid from the at least one cylinder and a duct/branch for the intake of the working fluid in the hydraulic accumulator, a duct for loading the working fluid in the at least one cylinder and at duct/branch for the output of the working fluid from the hydraulic accumulator.

An apparatus for the controlled return of the stems in cylinders of the types that can be applied to a press for stamping sheet metal, comprising: at least one fluid-operated cylinder), at least one hydraulic accumulator which is fluidically connected to the at least one cylinder by means of a hydraulic circuit which comprises: a duct for the discharge of the working fluid from the at least one cylinder and a duct/branch for the intake of the working fluid in the hydraulic accumulator, a duct for loading the working fluid in the at least one cylinder and at duct/branch for the output of the working fluid from the hydraulic accumulator.

The present invention relates to an extrusion press (10, 20, 30) with a press cylinder (111), the press cylinder (111) being driven with an electro-hydrostatic control system (104) for a power transmission and being connected to a separate drive (120, 400) for rapid traverse, with a container (115), wherein the container (115) is connected to a hydraulic cylinder (117) for a power transmission and to a further separate drive (119, 300) for rapid traverse, with a hydraulic cylinder (101) with a locking device (103) for driving a shearing tool (102), wherein the hydraulic cylinder (101) is connected to the electro-hydrostatic control system (104), and wherein the press cylinder (111) in the power transmission and the hydraulic cylinder (101) for driving a shearing tool (102) are controlled alternately via the common electro-hydrostatic control system (104).

The present invention relates to an extrusion press (10, 20, 30) with a press cylinder (111), the press cylinder (111) being driven with an electro-hydrostatic control system (104) for a power transmission and being connected to a separate drive (120, 400) for rapid traverse, with a container (115), wherein the container (115) is connected to a hydraulic cylinder (117) for a power transmission and to a further separate drive (119, 300) for rapid traverse, with a hydraulic cylinder (101) with a locking device (103) for driving a shearing tool (102), wherein the hydraulic cylinder (101) is connected to the electro-hydrostatic control system (104), and wherein the press cylinder (111) in the power transmission and the hydraulic cylinder (101) for driving a shearing tool (102) are controlled alternately via the common electro-hydrostatic control system (104).

Provided are a tire vulcanization device and a tire vulcanization method. A container ring is disposed on an outer circumferential side of segments mounted on outer circumferential surfaces of sector molds. A bolster plate is disposed above an upper plate mounted on an upper surface of an upper side mold. A green tire is placed in a sideways state on a lower side mold mounted on an upper surface of a lower plate. In a state where the bolster plate is moved downward by a pressurizing mechanism and maintained in a mold closed position, a container ring held slidably in a vertical direction with respect to the bolster plate by a connecting body is moved downward by pressurizing fluid supplied, and the sector molds are assembled in an annular shape to be closed with the upper side mold pressed against upper surfaces of the sector molds.

Provided are a tire vulcanization device and a tire vulcanization method. A container ring is disposed on an outer circumferential side of segments mounted on outer circumferential surfaces of sector molds. A bolster plate is disposed above an upper plate mounted on an upper surface of an upper side mold. A green tire is placed in a sideways state on a lower side mold mounted on an upper surface of a lower plate. In a state where the bolster plate is moved downward by a pressurizing mechanism and maintained in a mold closed position, a container ring held slidably in a vertical direction with respect to the bolster plate by a connecting body is moved downward by pressurizing fluid supplied, and the sector molds are assembled in an annular shape to be closed with the upper side mold pressed against upper surfaces of the sector molds.

A hydraulic press includes a press assembly moveable in relation to a support assembly by actuation of an actuator to provide a compressive force between the top platen and the bottom platen. The press assembly includes a top platen, a counter balance, and at least one platen guide rod interconnected between the top platen and the counter balance. The support assembly includes a bottom platen, a base frame, and at least one counter balance guide rod interconnected between the bottom platen and the base frame. The actuator is mounted between the bottom plate and the counter balance. The actuator is interchangeable with another actuator to change the compressive force of the hydraulic press.