Provided are a decompression shut-off valve device having high responsiveness and a method for controlling the same. The decompression shut-off valve device 10 includes an on-off valve 30, a detection pin 50, and an interlocking member 60 which operates the on-off valve 30 by displacement of the pressure-receiving section 52, a valve chamber 31, an accommodating chamber 17, and a cylinder 40 which accommodates an enlarged diameter section 37 provided in a rod section 33 of the on-off valve 30. The rod section 33 is slidably held through a second partition wall 18, and a rod end portion 36 of the rod section 33 is connected to the detection pin 50 via the interlocking member 60. The cylinder 40 is partitioned into a small diameter low-pressure chamber 80, and a large diameter high-pressure chamber 70 in which the working fluid having a higher pressure than the low-pressure chamber 80 is accommodated.

An apparatus for the hot-chamber die casting of non-ferrous alloys essentially consists of a press (115) for the closing/opening of a mould (110, 111) and an injection group (112) comprising a pump body (102) immersed in a pot (124) of the molten alloy and in which an injector piston (116) slides, an actuator (108) connected to the injector piston (116), and a gooseneck formed of in the pump body (102) and ending with a heated extension (103) provided with a nozzle (104) for the connection to the mould (110, 111), two hydraulic jacks (114) being secured between the injection group (112) and the press (115) which is fixed, the injection group (112) being divided into a stationary bottom portion and a top portion movable on sloped guides (109) parallel to the longitudinal axes of the extension (103) and of the hydraulic jacks (114), the pot (124) being mounted on horizontal rails (120) and the hydraulic jacks (114) being secured to the pump body (102).

Provided is a casting device that is able to operate stably while suppressing leakage from a gap between a tip and a sleeve. The casting device comprises: a sliding member in the center of which a rod slides, and in which a gap is formed between the rod and a sleeve; a seal member arranged at the outer periphery of the sliding member; and a suction device for suctioning air inside the sleeve. When the seal member is positioned in a center section closer to a cavity than the pouring hole, and the air in a space between the sliding member and the tip is suctioned, the seal member assumes a first state in which the seal member adheres to the center section, and in the first state the tip advanced toward the cavity.

A casting component and method for the application of an anticorrosive layer to a substrate, such as the casting component, are provided. The casting component for a device for casting a metal melt includes a metallic basic body and a melt contact surface region which is exposed to the metal melt during casting operation. In the casting component, the metallic basic body is provided in the melt contact surface region with an anticorrosive layer which is resistant to the metal melt and which is formed, using microparticles and/or nanoparticles of one or more substances from a substance group which includes borides, nitrides and carbides of the transition metals and their alloys and also of boron and silicon and Al.sub.2O.sub.3.

An injection device of a light metal injection molding machine includes: a first inert gas storage part creating an inert gas atmosphere around a plunger insertion portion of an injection cylinder; a second inert gas storage part housing surplus molten metal in a melting cylinder and creating an inert gas atmosphere above the molten metal; and a first pressure adjustment part adjusting a pressure in the first inert gas storage part to a pressure equal to or less than a pressure obtained by adding a pressure, which is determined based on a value obtained by multiplying a specific gravity of the molten metal by a height difference between a highest position and a lowest position of the molten metal in a part that includes the inside of the injection cylinder and communicates with the inside of the injection cylinder, and a pressure in the second inert gas storage part.

An injection assembly (1) of a die casting machine comprises valve means for controlling the advancement and return of the injection piston (20) and of the multiplier piston (42). The valve means comprise a plurality of valves, including a proportional delivery valve (104), a proportional injection discharge valve (112) and a proportional multiplier valve (118). Electronic control means (300) are provided which are configured and/or programmed to execute an air purge cycle which performs the opening and closing of the valves, alternately, for a predetermined number of times.

An injection assembly (1) of a die casting machine comprises valve means for controlling the advancement and return of the injection piston (20) and of the multiplier piston (42). The valve means comprise a plurality of valves, including a proportional delivery valve (104), a proportional injection discharge valve (112) and a proportional multiplier valve (118). Electronic control means (300) are provided which are configured and/or programmed to execute an air purge cycle which performs the opening and closing of the valves, alternately, for a predetermined number of times.

An apparatus for the hot-chamber die casting of non-ferrous alloys essentially consists of a press (115) for the closing/opening of a mould (110, 111) and an injection group (112) comprising a pump body (102) immersed in a pot (124) of the molten alloy and in which an injector piston (116) slides, an actuator (108) connected to the injector piston (116), and a gooseneck formed of in the pump body (102) and ending with a heated extension (103) provided with a nozzle (104) for the connection to the mould (110, 111), two hydraulic jacks (114) being secured between the injection group (112) and the press (115) which is fixed, the injection group (112) being divided into a stationary bottom portion and a top portion movable on sloped guides (109) parallel to the longitudinal axes of the extension (103) and of the hydraulic jacks (114), the pot (124) being mounted on horizontal rails (120) and the hydraulic jacks (114) being secured to the pump body (102).

The present invention is directed to a molten metal pump comprising an elongated pumping chamber tube with a base end and an open top end. A shaft extends into the tube and rotates an impeller therein, the impeller rotates proximate the base end. The tube has a diameter at least 1.1 times the diameter of the impeller. The pumping chamber tube preferably has a length at least three times the height of the impeller. The base end includes an inlet and the top end includes a tangential outlet. Rotation of the impeller draws molten metal into the pumping chamber and creates a rotating equilibrium vortex that rises up the walls of the pumping chamber. The rotating vortex adjacent the top end exists the device via the tangential outlet.

An injection device of a light metal injection molding machine includes: a first inert gas storage part creating an inert gas atmosphere around a plunger insertion port of an injection cylinder; a second inert gas storage part housing surplus molten metal in a melting cylinder and creating an inert gas atmosphere above the molten metal; and a first pressure adjustment part adjusting a pressure in the first inert gas storage part to a pressure equal to or less than a pressure obtained by adding a pressure, which is determined based on a value obtained by multiplying a specific gravity of the molten metal by a height difference between a highest position and a lowest position of the molten metal in a part that includes the inside of the injection cylinder and communicates with the inside of the injection cylinder, and a pressure in the second inert gas storage part.