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 method for producing a component from an aluminum alloy using a semisolid method is provided. The alloy contains less than 1.3% by weight of iron and no more than 0.2% by weight of silicon, and the component has sufficient ductility such that the component can be joined to other components by self-piercing riveting, flow drilling, high-speed tack setting, friction welding and/or weld riveting.

An injection piston can be driven along an axial direction of a heating barrel. The injection piston is connected to a screw and drives the screw along the axial direction. An injection hydraulic cylinder drives the injection piston in the axial direction by pressure of hydraulic oil. Inside of the injection hydraulic cylinder being partitioned into a first chamber and a second chamber. An oil discharge port is provided in the injection hydraulic cylinder and discharges the hydraulic oil from the second chamber. A first valve is inserted in a path for discharging the hydraulic oil discharged from the second chamber. A second valve opens when the pressure of the provided oil is higher than a first threshold value. The first valve closes when the pressure of the hydraulic oil supplied through the second valve is applied to the first valve.

An injection piston can be driven along an axial direction of a heating barrel. The injection piston is connected to a screw and drives the screw along the axial direction. An injection hydraulic cylinder drives the injection piston in the axial direction by pressure of hydraulic oil. Inside of the injection hydraulic cylinder being partitioned into a first chamber and a second chamber. An oil discharge port is provided in the injection hydraulic cylinder and discharges the hydraulic oil from the second chamber. A first valve is inserted in a path for discharging the hydraulic oil discharged from the second chamber. A second valve opens when the pressure of the provided oil is higher than a first threshold value. The first valve closes when the pressure of the hydraulic oil supplied through the second valve is applied to the first valve.

A thixomolding material includes: a metal body that contains Mg as a main component; and a coating portion that is adhered to a surface of the metal body via a binder and contains C particles containing C as a main component. A mass fraction of the C particles in a total mass of the metal body and the C particles is 5.0 mass % or more and 40.0 mass % or less. The binder may contain waxes. The C particles may be graphite particles.

The present disclosure relates to a copper based microcrystalline alloy and a preparation method thereof, and an electronic product. In percentage by weight and based on the total amount of the copper based microcrystalline alloy, the copper based microcrystalline alloy includes: 30-60 wt % of Cu; 25-40 wt % of Mn; 4-6 wt % of Al; 10-17 wt % of Ni; 0.01-10 wt % of Si; and 0.001-0.03% of Be.

Proposed is an electromagnetic vibration stirring device of semi-solid high pressure casting equipment. The electromagnetic vibration stirring device includes: a ring-shaped casing including an inner wall into which a sleeve is inserted and an outer wall spaced apart from the inner wall; and a magnetic field generating unit located between the inner wall and the outer wall of the casing, and including a plurality of electromagnets radially arranged at equal intervals around the sleeve in a circumferential direction of the sleeve, each of the electromagnets including a core and a coil surrounding the core. The magnetic field generating unit generates a magnetic field by applying a current to the electromagnets in a clockwise or counterclockwise direction, and each portion of a semi-solid molten metal is sequentially vibrated by the magnetic field along the circumferential direction of the sleeve, thereby controlling a microstructure of the molten metal.

A thixomolding material includes: a metal body containing magnesium(Mg) as a primary component; a plurality of coating particles provided at a front surface of the metal body and having an average particle diameter equal to or less than 100 μm, the plurality of coating particles being made of an inorganic material differing from the metal body; and an interposed particle interposed between the metal body and the coating particles and having an average particle diameter smaller than the coating particle, the interposed particle being made of an inorganic oxide.

A die casting machine includes a clamping device 7 which opens and closes and clamps a pair of die halves, an injection apparatus which performs injection to the pair of die halves by making a plunger move forward in a sleeve communicated with a space between the pair of die halves, and a control device which controls the clamping device and injection apparatus. The control device includes an injection control part and press-use clamping control part. The injection control part controls the injection apparatus so as to start the injection in a state where the pair of die halves face each other through a gap. The press-use clamping control part controls the clamping device so that the die contact and clamping are carried out after the start of injection. Further, the injection control part performs control for decelerating the plunger before the plunger stops.

A device for die-casting metal material, including a screw unit for bringing the material into a thixotropic state and a cylinder/piston unit fed by the screw unit for applying pressure to the thixotropic material for the die casting, wherein a thermally controllable valve is arranged between the screw unit and the cylinder/piston unit.