High pressure device and method for clean room applications

A reciprocating piston device for the closure of a vessel and consisting of at least one base element and one closure element, said system encompassing at least one movable piston (1) with one hydraulic cylinder each (7), and at least one movable intensifier piston (2) also combined with one intensifier cylinder each (8), all of which are rotationally symmetrical, hydraulic piston (1) and its hydraulic cylinder (7) and intensifier piston (2) and its intensifier cylinder (8) each being arranged along an axis of rotation and hydraulic piston (1) featuring on the piston end located in the hydraulic cylinder (7) at least one circumferential reinforcement running radially on its outer surface, with the result that the internal space between the hydraulic cylinder (7) and the hydraulic piston (1) is divided into not less than two subsidiary spaces (3) and (5), and not less than one bore (10) and (11) in hydraulic cylinder (7) leading to each of these subsidiary spaces, the cylinder (1) being driven water-hydraulically and the intensifier piston (2) pneumatically, wherein

• hydraulic piston (1) and intensifier piston (2) are incorporated into a direct axial function in relation to the axis of rotation, via the fluid located in space (3) between lower face (19) of piston (1) and upper face (18) of intensifier piston (2),
• the upper face of hydraulic piston (1) forming at least part of the closure of vessel (9) or being rigidly connected to the closure part of vessel (9), and
• the said closure part essentially moves along the axis of rotation in relation to hydraulic piston (2), and vessel (9) is arranged opposite the upper face of hydraulic piston (1), and
• at least one of the sliding surfaces (13 to 16) located on the internal surfaces of the cylinders and on the piston surfaces in the zones in which the cylinder and piston surfaces are located opposed to one another and in contact and move relative to one another parallel to the axis of rotation, shows a support ratio of >60%, said ratio representing the proportion of “peaks” to the “valleys” of the surface structure, and
• the reciprocating piston system is open with regard to the feed and discharge of the operating fluid.

A reciprocating piston device for pressing or forming of at least one semi-finished product, consisting of not less than one hydraulic piston (1) each with a hydraulic cylinder (7), and not less than one moving intensifier piston (2) each with an intensifier cylinder (8), all rotationally symmetrical, hydraulic piston (1) and its hydraulic cylinder (7) and intensifier piston (2) and its intensifier cylinder (8) each being arranged along an axis of rotation, and the hydraulic piston end located in the hydraulic cylinder having not less than one circumferential reinforcement running radially on the external surface, such that the internal space between hydraulic cylinder (7) and hydraulic piston (1) is divided into not less than two subsidiary chambers (3) and (5), and at least one bore (10) and (11) in hydraulic cylinder (7) leading to each of these subsidiary chambers (3) and (5), hydraulic piston (1) being actuated water-hydraulically and intensifier piston (2) pneumatically, characterized in that

• hydraulic piston (I) and intensifier piston (2) form a direct axial functional unit with one another relative to the axis of rotation, with the aid of a fluid which is located in a space (3) between lower face (19) of hydraulic cylinder (1) and upper face (18) of intensifier piston (2), the upper face of hydraulic piston (I) at least partially forming the pressing or forming tool or being rigidly connected to a pressing or forming tool and this pressing or forming tool essentially moving along the axis of rotation relative to hydraulic piston (1) and the semifinished product being located opposite the upper face (17) of hydraulic piston (1),
• at least one of the sliding surfaces (13 to 16) located on the internal surfaces of the cylinders and on the piston surfaces in the zones in which the cylinder and piston surfaces are located opposed to one another and in contact and move relative to one another parallel to the axis of rotation, shows a support ratio of >60%, said ratio representing the proportion of elevations (“peaks”) to the depressions (“valleys”) of the surface structure.