A linear actuator is disclosed. The linear actuator comprises a cylinder portion and a base portion. The cylinder portion comprises a housing defining internally a compression chamber for containing a fluid and comprising a piston assembly that can reciprocate within the compression chamber. The housing further defines a cylinder port in fluid communication with said compression chamber. The base portion defines a first base port and a second base port and a passage extending therebetween fluidly communicating the first base port with the second base port, and comprises valve means operable to control the flow of fluid through the second base port, in which the valve means is actuatable between an open condition in which the flow of fluid through the second base port is permitted, and a closed condition in which the flow of fluid through the second base port is substantially prevented. The cylinder portion is releasably engageable with the base portion such that the cylinder portion and the base portion may be arranged in an engaged condition in which engaged condition the cylinder port and the second base port are in fluid communication.

The invention relates to a cycle press, in particular a short-cycle press, for producing and/or coating board-shaped materials, in particular engineered wood boards, comprising a press body having several press frames arranged next to one another in the longitudinal press direction, and further comprising an upper press plate and a lower press plate, wherein pressing cylinders supported on the press frames act on the upper press plate or the lower press plate. According to the invention, said cycle press is characterized in that the pressing cylinders are attached to the press frames by means of frame pins, wherein said frame pins engage in cut-outs of the press frames. Thus, the pressing cylinders can be prestressed against the press frames.

The invention relates to a cycle press, in particular a short-cycle press, for producing and/or coating board-shaped materials, in particular engineered wood boards, comprising a press body having several press frames arranged next to one another in the longitudinal press direction, and further comprising an upper press plate and a lower press plate, wherein pressing cylinders supported on the press frames act on the upper press plate or the lower press plate. According to the invention, said cycle press is characterized in that the pressing cylinders are attached to the press frames by means of frame pins, wherein said frame pins engage in cut-outs of the press frames. Thus, the pressing cylinders can be prestressed against the press frames.

Embodiments of the present disclosure are directed to new and improved self-contained compactor systems incorporating a straight-push cylinder design, in which the compactor system is actuated in a horizontal direction. The improved design accommodates increased storage volume, long wear parts, simplified reservoir cleaning, and easier external access to the components, cylinders, and hoses of the self-contained compactor system.

Embodiments of the present disclosure are directed to new and improved self-contained compactor systems incorporating a straight-push cylinder design, in which the compactor system is actuated in a horizontal direction. The improved design accommodates increased storage volume, long wear parts, simplified reservoir cleaning, and easier external access to the components, cylinders, and hoses of the self-contained compactor system.

The invention relates to a precision blanking press comprising a top, a base and tie rods and columns that connect the top and the base non-positively.

The object of the invention is to provide a precision blanking press characterized by a press frame with a high stiffness, low mass and simple design, the press allowing the transfer of higher cutting forces during fine blanking while safely eliminating the axial play between the adjustment elements and at the same time improving the operational safety.

This object is achieved by providing that the knife-edged ring cylinder (32) is designed as a one-piece core member (16), a separate stripping/pushing cylinder (31) with stripping/pushing piston (35) in line with the stroke axis (HU) being disposed on the core member, and that an ejector piston (76) is associated with the counterstay piston (75) in the main piston (2), wherein the stripping/pushing piston (35) and the ejector piston (76) each have associated working chambers (36a, 36b; 79) that are independent of one another and are mutually connected hydraulically, and at least two diametrically opposite pre-loading pistons (59) and piston rods (60) disposed at the top (4) are associated with the stripping/pushing cylinder/core member (31/16), each of said pre-loading pistons being guided in a pre-loading cylinder chamber (58a, 58b) in the top (4) perpendicular to, and in line with, an adjusting nut (25), the cylinder being pressurized with fluid from the hydraulic system (39), wherein the piston rods (60) are connected together by way of an adjusting cross member (62) such that an adjustment motion of the pre-loading piston and the piston rods (59, 60) applies an external vertical adjusting force (F) to the stripping/pushing cylinder/core member (31/16), locking or releasing the internal threading (24) of the adjusting nut (25) at the external threading (23) of the core member (16) axially, and the main piston (2) comprises protruding discus-shaped working surfaces (68a, 68b) that subdivide working chambers (69a, 69b) disposed one atop the other vertically with minimal travel (H) in the cylinder chamber (65) of the base (5).

Embodiments of the present disclosure are directed to new and improved self-contained compactor systems incorporating a straight-push cylinder design, in which the compactor system is actuated in a horizontal direction. The improved design accommodates increased storage volume, long wear parts, simplified reservoir cleaning, and easier external access to the components, cylinders, and hoses of the self-contained compactor system.

Embodiments of the present disclosure are directed to new and improved self-contained compactor systems incorporating a straight-push cylinder design, in which the compactor system is actuated in a horizontal direction. The improved design accommodates increased storage volume, long wear parts, simplified reservoir cleaning, and easier external access to the components, cylinders, and hoses of the self-contained compactor system.

A pressing device configured to press a workpiece includes a first die, a second die that moves relative to the first die, and a piston that moves the second die. The piston includes an annular pressing surface that pushes the second die.

A forging machine includes a first tool carrier and a second tool carrier, a drive system for driving the first tool carrier in a working movement, a machine frame, wherein the machine frame is formed of a concrete prestressed with prestressing elements, wherein the machine frame comprises a frame base and a frame support connected to the frame base, wherein longitudinal prestressing elements are provided which extend parallel to the central axis (M) and each extend through the frame support, the frame base, and through the cross-member, wherein transverse prestressing elements are provided both in the frame base and in the cross-member, wherein the longitudinal prestressing elements and the transverse prestressing elements include prestressing anchors, and wherein the prestressing anchors are each arranged on an outer surface of the frame base or the cross-member.