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).

A hydraulic power unit for full compactor automation comprises a housing with a support frame, electrical control cabinet and plate cover; a reservoir; an electric motor on the frame; a hydraulic pump directly coupled to the motor; a CAN control system including a CAN controller, a gateway and antennae mounted to the housing and wherein the unit measures the current draw by the motor with a current transformer and wherein a signal level from the current transformer is fed to the CAN controller whereby decisions about the compactor's fullness are based on this signal level; an Integrated Circuit Hydraulic Manifold on the mounting plate including at least one Directional Control Valve, a Relief Valve, a Hydraulic Filter and a Check Valve; and an electronic entry PIN pad device on the electrical control cabinet allowing users to enter a personal identification number and operational commands.

An electro-hydrostatic actuator system for a press drive, having an upper piston with a press surface, which acts from a first direction, wherein the press surface of the upper piston is actuated by means of a piston rod in a hydraulic cylinder of the upper piston and traverses a first distance in a press run, and a first electro-hydrostatic actuator for driving the upper piston, comprising a first pump and a first motor generators which is controlled by a first controller. The system furthermore comprises at least one auxiliary piston with a press surface, which acts from a second direction opposite the first direction, wherein the press surface of the auxiliary piston is actuated by means of a piston rod in a hydraulic cylinder of the auxiliary piston and traverses a second distance in the press run, and a second electro-hydrostatic actuator for driving the at least one auxiliary piston, comprising a second pump and a second motor generator which is controlled by a second controller. The second motor generator is operated as a generator in the press run, thereby generating energy which is provided to the first motor generator or auxiliary piston, which are operated as motors, via the common DC bus.

A hydraulic press includes a workbench having four corners provided with uprights. The uprights are arranged in two rows front and rear, and the tops of the uprights in each row are connected by an upper beam extending in a left-right direction. Tie rods are inserted in the front and rear of each upright. The tie rods each have an upper end protruding from the top of the upper beam and fixed to the upper beam by an upper nut and a lower end protruding from the bottom of the workbench and fixed to the workbench by a lower nut. A central cylinder is provided at the center of the upper beam. Side cylinders are symmetrically arranged on the left and right of the central cylinder. The lower ends of plungers of the central cylinder and the side cylinders are fixedly connected to a top of a slider.

The press machine includes: a hydraulic cylinder configured to drive a slide; a plurality of hydraulic pumps/motors; a first port of each of which is connected to a first pressurizing chamber of the hydraulic cylinder; a plurality of servomotors axially connected to rotating shafts of the respective hydraulic pumps/motors respectively; a low-pressure accumulator to which second ports of the hydraulic pumps/motors are each connected; a high-pressure accumulator connected to a second pressurizing chamber of the hydraulic cylinder; and a slide position controller configured to control the servomotors so that a position of the slide matches a position corresponding to a slide position command signal based on the slide position command signal from a slide position commander and a slide position signal from a slide position detector.

A press machine is provided. Two vertical hydraulic cylinders are arranged on an upper beam plate of a press machine body, and the two hydraulic cylinders correspond to workbenches at corresponding positions in a one-to-one correspondence, constituting left and right working units, and a common mechanical drive unit and a common hydraulic drive unit are set for the left and right working units. The mechanical driving unit is composed of a driving motor through an electromagnetic clutch, an electromagnetic brake and lead screw nut driving mechanism driven by a gear pair. According to the load profiles during the working process of hydraulic press machine, the mechanical driving unit or the hydraulic driving unit are selected to provide energy for the two working units. A control method for the press machine, a press machine execution system and a control method for the press machine execution system are further involved.

A hydraulic system includes: a cylinder in which an interior of a tube is divided by a piston into a first pressure chamber and a second pressure chamber; a first bidirectional pump connected to the first pressure chamber by a first supply/discharge line; a second bidirectional pump connected to the second pressure chamber by a second supply/discharge line and coupled to the first bidirectional pump in a manner enabling torque to be transmitted between the first and second bidirectional pumps; a relay line connecting the first and second bidirectional pumps such that a hydraulic liquid discharged from one of the first and second bidirectional pumps is introduced into the other of the first and second bidirectional pumps; and an electric motor that drives the first or second bidirectional pump. At least one of the first and second bidirectional pumps is a variable displacement pump whose delivery capacity per rotation is freely variable.

A press brake is provided with a hydraulic cylinder configured to move an upper table and a lower table relative to each other in a vertical direction, and a control unit configured to control a hydraulic circuit of the hydraulic cylinder, in which the control unit manages a predictor of an occurrence of an abnormality in the hydraulic circuit including a first pressure control valve configured to control a back pressure of hydraulic oil on a first port side of the hydraulic cylinder.

The die cushion device includes a first hydraulic cylinder for supporting a cushion pad, and a first hydraulic circuit for driving the first hydraulic cylinder. The first hydraulic circuit is a hydraulic closed circuit including a logic valve connected between a die cushion pressure generation line and a system pressure line, and a hydraulic pump driven by a first servomotor for applying a pilot pressure to the logic valve. The first controller controls the first servomotor (pilot pressure) based on a first pressure command corresponding to the die cushion force and the pressure detected by the first pressure detector to control the pressure in a lower chamber of the first hydraulic cylinder so that the pressure is equal to a pressure corresponding to the first pressure command.

An automatic can crusher apparatus for crushing cans for recycling includes a housing having a ram aperture extending through to a housing inside. A ram has a pneumatic cylinder body, a ram arm extending through the ram aperture, and a ram head coupled to the ram arm. The ram moves the ram head between a load position and a crush position adjacent a housing right side. A can positioner is coupled to a housing left side within the housing inside to secure a can adjacent the ram head in the load position. A feeder chute is coupled to the housing top side to receive a plurality of cans through a chute top end and dispense each can through a chute bottom end onto the can positioner when the ram head is in the load position.