A hermetically sealed disc drive comprising at least one aluminum alloy housing component manufactured with a thermally directed die casting press subassembly is disclosed. In one embodiment, the thermally directed die casting press subassembly comprises a thermally directed funnel gate that is skewed to sample molten material from an off-center portion of the shot sleeve. Disc drive housing components can be manufactured by injecting an aluminum alloy slurry from the shot sleeve through the thermally directed funnel gate and the injection nozzle into the die cavity. The aluminum alloy slurry may be a thixotropic slurry comprising a uniform primary aluminum particle size in the range of approximately 50 to 80 microns. The primary aluminum particles of cast products produced according to the methodology of the present disclosure, with the aforementioned particle size distribution, are free of encapsulated eutectic at the micron scale.

A PISTON FOR COLD-CHAMBER INJECTION MACHINES comprising a support (2) and an external body (3) with a sealing ring (5), joined by a bayonet lock ring (6) independent of the external body (3) and divided into two parts (6a) fitted onto a groove (21) in the support (2) and connected by long screws (7) inserted into threaded holes (61). The piston preferably includes a spring bush (4) as a part that adjusts to the container, independent of the external body (3) and of the bayonet lock ring (6), under which a conical spring ring (8) is included which exerts pressure on the two parts that form the bush (4), tending to expand the same. The piston also includes alternating transverse grooves (81) along the edges thereof for receiving conical metal tips (9) inserted through holes (63) in the bayonet lock ring (6).

A wear ring for a piston of a die-casting apparatus comprises an annular body having a gap extending therethrough. The gap is configured to define at least two circumferentially offset pairs of circumferentially spaced apart facing surfaces. The facing surfaces of each pair are angled and configured to contact each other in a flush manner when the wear ring is circumferentially compressed.

A casting device (01) for a vacuum-assisted pressure die casting system includes a casting chamber (10), which has a wall surface (11), and a plunger (20) configured to move longitudinally in the casting chamber (10) and completing the casting chamber (10) at a first end (12), the casting chamber (10) comprising a filling hole (14), the casting chamber (10) having a gate (16) at a second end (13) opposite the first end, the gate (16) being at an end face, wherein at least one suction groove (17) is disposed tangentially in the inner side of the wall surface (11) at least in sections, and at least one suction hole (18) being disposed in the suction groove (17). Furthermore, a vacuum-assisted pressure die casting system including at least one casting device (01) and a method for operating a vacuum-assisted pressure die casting system are disclosed.

An production apparatus of a semi-solidified metal has a vessel and a cooling device. The vessel into which a liquid-state metal material M is poured has a hollow member which is opened in up and down directions, and a bottom member which can close the lower opening of the hollow member and can be separated from the hollow member. The cooling device can cool the bottom member more than the hollow member.

Provided is a high-pressure casting method and a high-pressure casting device which are capable of safe and high-quality casting of a high-fusion-point metal having a fusion point exceeding 1000 K. After melting a casting material (1) inside a melting container (2) of cartridge type, the melting container (2) is linearly moved to pass through a guide (14) attached to a casting port bush (13) to thereby be communicated with the casting port bush (13). The melting container (2) is brought into close contact with the guide (14) and is setting to a cooling state. After the elapse of prescribed time, a plunger (50) is brought into contact with a plunger tip (4), and is immediately transferred together with a molten metal to the casting port bush (13). The molten metal is pressurized inside the casting port bush (13), and is injection-filled into a cavity (10).

A pressure die casting piston assembly has a pressure die casting piston. The die casting piston has a front head, a substantially cylindrical side wall extending upwardly from the front head in fixed position relative thereto. A cup-shaped chamber is defined by the front head and the side wall. The side wall is closed by the front head. The die casting piston has a coolant channel passing through the side wall to allow a coolant to pass through the side wall and within the side wall.

A squeeze pin circuit is installed to a direction switching valve. The direction switching valve is configured to switch a direction of hydraulic pressure to a core cylinder. The squeeze pin circuit is configured to drive a squeeze pin. The squeeze pin is configured to partially pressurize molten metal filled in a cavity. The squeeze pin circuit includes a squeeze pin cylinder and a flow rate adjusting unit. The squeeze pin cylinder is coupled to the direction switching valve to drive the squeeze pin. The flow rate adjusting unit is installed on a hydraulic pressure path. The hydraulic pressure path couples the direction switching valve to a head side of the squeeze pin cylinder. The flow rate adjusting unit is configured to ensure pressure compensation and temperature compensation.

A device for die casting a metal component included a die casting mold which has a cavity that forms the component. The cavity is connected to a source for a metal melt by at least one temperature controlled supply channel. The metal melt is introduced into the cavity via at least one casting valve. The supply channel forms an annular channel, in which metal melt can be circulated via a conveying apparatus.

A piston head for making a piston of a press for a die-casting machine comprises a head body wherein at least one ring seat suitable to receive a respective sealing ring, is obtained. A lubrication circuit is obtained in the head body and comprises at least one lubrication end duct leading into a surface channel which runs through the bottom wall of the ring seat in order to convey the lubricant towards gaps between sealing ring and head.