A molding system for a low-pressure light alloy casting plant, extending in height along a main axis, has a mold having a lower half-mold and an upper half-mold. The molding system has a first lower fixed plate on which the lower half-mold is housed, a movable plate on which the upper half-mold is housed, a second upper fixed plate positioned at the top of the movable plate, a movement group for moving the movable plate along the main axis, having an electric drive motor and transmission members operatively connected to the electric drive motor and to the movable plate, a casting ejection group having an electric ejector motor and ejection members movable by the electric ejector motor in an ejection position in which the casting is detached from the upper half-mold, and a command unit controlling operation of the electric drive motor and of the electric ejector motor.

An exemplary die casting press includes a moveable platen that can be actuated to move toward and away from a fixed platen along tie bars. A fixed die is mounted on the fixed platen and a moveable die is mounted on the moveable platen. A die locking system has a locking post that is attached to and extends from the fixed die and a locking cam that is attached to the moveable die. An actuator moves the locking cam between a locked position and an unlocked position to engage and disengage from the locking post, respectively.

An exemplary die casting press includes a moveable platen that can be actuated to move toward and away from a fixed platen along tie bars. A fixed die is mounted on the fixed platen and a moveable die is mounted on the moveable platen. A die locking system has a locking post that is attached to and extends from the fixed die and a locking cam that is attached to the moveable die. An actuator moves the locking cam between a locked position and an unlocked position to engage and disengage from the locking post, respectively.

The present technology includes a hydraulic die-casting machine with electric motor actuated by an inverter, which provides an energy saving evaluation system with respect to a die-casting machine without inverter. The hydraulic die-casting machine includes an injection assembly provided with an injection piston for pressurizing case metal poured into a die and a hydraulic circuit for actuating the injection piston, a hydraulic pump for feeding the hydraulic circuit through a delivery line, an electric motor for actuating the hydraulic pump and an inverter for actuating the electric motor, and an evaluation system for evaluation of the energy savings provided by the present tehcnology.

A clamping device (14) comprises a pressure receiving platen (24), a stationary platen (20), a movable platen (22), a toggle mechanism (28), and a drive device (37). A first position detector (38a) detects the operation amount of the movable platen (22) based on the position of a crosshead (26); a pressure detector (35) detects the actual clamping force of a mold (19); and a second position detector (43) detects the actual position of the movable platen (22). A control portion (50) has first correction means correcting the operation amount of the movable platen (22) at the time of a minute mold opening operation based on the actual clamping force and on the set clamping force, and second correction means correcting the operation amount of the movable platen (22) at the time of the minute mold opening operation based on the operation amount of the movable platen (22) and on the position of the movable platen (22).

A clamping device (14) comprises a pressure receiving platen (24), a stationary platen (20), a movable platen (22), a toggle mechanism (28), and a drive device (37). A first position detector (38a) detects the operation amount of the movable platen (22) based on the position of a crosshead (26); a pressure detector (35) detects the actual clamping force of a mold (19); and a second position detector (43) detects the actual position of the movable platen (22). A control portion (50) has first correction means correcting the operation amount of the movable platen (22) at the time of a minute mold opening operation based on the actual clamping force and on the set clamping force, and second correction means correcting the operation amount of the movable platen (22) at the time of the minute mold opening operation based on the operation amount of the movable platen (22) and on the position of the movable platen (22).

The disclosure provides a local extrusion device for high-pressing casting. The local extrusion device for high-pressure casting includes an extrusion core sleeve, an extrusion rod, an extrusion oil cylinder and an extrusion oil cylinder piston. The extrusion oil cylinder includes the extrusion oil cylinder piston, the extrusion oil cylinder piston is connected with the extrusion rod, the extrusion rod is positioned in the extrusion core sleeve, and the extrusion core sleeve and the extrusion oil cylinder are fixed.

A clamping device (14) comprises a pressure receiving platen (24), a stationary platen (20), a movable platen (22), a toggle mechanism (28), and a drive device (37). A first position detector (38a) detects the operation amount of the movable platen (22) based on the position of a crosshead (26); a pressure detector (35) detects the actual clamping force of a mold (19); and a second position detector (43) detects the actual position of the movable platen (22). A control portion (50) has first correction means correcting the operation amount of the movable platen (22) at the time of a minute mold opening operation based on the actual clamping force and on the set clamping force, and second correction means correcting the operation amount of the movable platen (22) at the time of the minute mold opening operation based on the operation amount of the movable platen (22) and on the position of the movable platen (22).

There is provided an opening/closing apparatus which can eliminate the influence of a slight gap formed between a bush and a pin in a link connecting portion of a toggle link mechanism and, in addition, can enhance workability e.g mold replacement,

An opening/closing apparatus according to an embodiment includes: a fixed platen 20 to which one mold 21 of a pair of molds is to be mounted; a movable platen 22 to which the other mold 23 is to be mounted; a pressure-receiving platen 24 connected to the fixed platen 20 via tie bars 36; an opening/closing mechanism for opening/closing the molds by moving the movable platen 22 back and forth, including a toggle link mechanism 28 connecting the pressure-receiving platen 24 and the movable platen 22; a first drive mechanism for driving the opening/closing mechanism; and a second drive mechanism 50 for applying a load to the movable platen 22 in a given direction in conjunction with the first drive mechanism.

There is provided an opening/closing apparatus which can eliminate the influence of a slight gap formed between a bush and a pin in a link connecting portion of a toggle link mechanism and, in addition, can enhance workability e.g mold replacement,

An opening/closing apparatus according to an embodiment includes: a fixed platen 20 to which one mold 21 of a pair of molds is to be mounted; a movable platen 22 to which the other mold 23 is to be mounted; a pressure-receiving platen 24 connected to the fixed platen 20 via tie bars 36; an opening/closing mechanism for opening/closing the molds by moving the movable platen 22 back and forth, including a toggle link mechanism 28 connecting the pressure-receiving platen 24 and the movable platen 22; a first drive mechanism for driving the opening/closing mechanism; and a second drive mechanism 50 for applying a load to the movable platen 22 in a given direction in conjunction with the first drive mechanism.