An injection molding material for magnesium thixomolding includes: a powder containing Mg as a main component; and a chip containing Mg as a main component, in which a proportion of the powder in the injection molding material for magnesium thixomolding is 5 mass % or more and 45 mass % or less, and a tap density of the powder is 0.15 g/cm.sup.3 or more.

A die-casting machine has a casting mould, a casting chamber, a casting piston arranged in an axially moveable manner in the casting chamber, a melt inlet channel which leads into the casting chamber, a shut-off valve in the melt inlet channel, a melt outlet channel which leads from the casting chamber to the casting mould, and a control unit for controlling the casting piston. For carrying out a respective casting process, the die-casting machine is configured, for a mould-filling phase, to bring the shut-off valve into a closed position, and to control the casting piston in the casting chamber to advance from a casting start position to a filling end position, in order to press melt material into the casting mould via the melt outlet channel, and, for a subsequent refilling phase, to bring the shut-off valve into an open position and to control the casting piston to move back to the casting start position, in order to supply the casting chamber with melt material via the melt inlet channel. A closure nozzle is provided in the melt outlet channel. The machine is configured to keep the closure nozzle closed in the refilling phase and, in the mould-filling phase, with the shut-off valve remaining closed, to firstly move the casting piston back from the casting start position to an additional stroke position and to subsequently advance it from the additional stroke position via the casting start position to the filling end position, and at this time to keep the closure nozzle closed during the return movement of the casting piston to the additional stroke position and to only open it when the casting piston advances again.

A die-casting machine has a casting mould, a casting chamber, a casting piston arranged in an axially moveable manner in the casting chamber, a melt inlet channel which leads into the casting chamber, a shut-off valve in the melt inlet channel, a melt outlet channel which leads from the casting chamber to the casting mould, and a control unit for controlling the casting piston. For carrying out a respective casting process, the die-casting machine is configured, for a mould-filling phase, to bring the shut-off valve into a closed position, and to control the casting piston in the casting chamber to advance from a casting start position to a filling end position, in order to press melt material into the casting mould via the melt outlet channel, and, for a subsequent refilling phase, to bring the shut-off valve into an open position and to control the casting piston to move back to the casting start position, in order to supply the casting chamber with melt material via the melt inlet channel. A closure nozzle is provided in the melt outlet channel. The machine is configured to keep the closure nozzle closed in the refilling phase and, in the mould-filling phase, with the shut-off valve remaining closed, to firstly move the casting piston back from the casting start position to an additional stroke position and to subsequently advance it from the additional stroke position via the casting start position to the filling end position, and at this time to keep the closure nozzle closed during the return movement of the casting piston to the additional stroke position and to only open it when the casting piston advances again.

A method for manufacturing a high-quality aluminum casting includes preparing an aluminum alloy raw material including Si in an amount of 9-12 wt %, melting the raw material to prepare a molten metal, adding a refiner containing Ti, B, and Sr to the molten metal, injecting the molten metal into a casting apparatus to maintain the temperature of the molten metal added with the refiner at 585-610° C., and operating the casting apparatus to cast the injected molten metal into a product having a predetermined shape.

A method for manufacturing a high-quality aluminum casting includes preparing an aluminum alloy raw material including Si in an amount of 9-12 wt %, melting the raw material to prepare a molten metal, adding a refiner containing Ti, B, and Sr to the molten metal, injecting the molten metal into a casting apparatus to maintain the temperature of the molten metal added with the refiner at 585-610° C., and operating the casting apparatus to cast the injected molten metal into a product having a predetermined shape.

A vehicle wheel, or other axisymmetric shaped article, is formed of an aluminum-based alloy by a combination of a liquid forging step of a pre-form shape of the wheel and a subsequent solid-state flow forming step to complete the specified shape of the wheel. An aluminum-based alloy, containing specified amounts of zinc, silicon, and magnesium is devised for use in the forming process. The composition of the aluminum-based alloy is devised to facilitate the performance of each forming step of the article and the mechanical properties of the final shaped product.

A vehicle wheel, or other axisymmetric shaped article, is formed of an aluminum-based alloy by a combination of a liquid forging step of a pre-form shape of the wheel and a subsequent solid-state flow forming step to complete the specified shape of the wheel. An aluminum-based alloy, containing specified amounts of zinc, silicon, and magnesium is devised for use in the forming process. The composition of the aluminum-based alloy is devised to facilitate the performance of each forming step of the article and the mechanical properties of the final shaped product.

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).

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).

A method for casting an aluminum alloy includes: pouring molten metal of an aluminum alloy comprising 6.0 to 9.0 mass % of Si, 0.4 to 0.8 mass % of Mg, 0.25 to 1.0 mass % of Cu, 0.08 to 0.25 mass % of Fe, 0.6 mass % or less of Mn, 0.2 mass % or less of Ti, and 0.01 mass % or less of Sr, with the balance being Al and unavoidable impurities into a shot sleeve of a die casting machine; filling a mold cavity of a center-gate die with the molten metal at a gate speed of 1 msec or less so as to produce a laminar flow, and subjecting T5 heat treatment so as to obtain the aluminum alloy having a tensile strength of 240 MPa or more.