A molten metal feed pipe for feeding a molten metal of an nonferrous alloy includes an outer tube made of a ferrous material, an inner tube made of a molten metal resistant material, and an intermediate member made of a compact of a fibrous non-organic material, which is disposed between the outer tube and the inner tube. The intermediate member, positioned in the central region of the molten metal feed pipe with respect to the longitudinal axial direction of the molten metal feed pipe, is disposed between the outer tube and the inner tube with the intermediate member being compressed in a radial direction of the molten metal feed pipe.

A pointing device includes: a film that includes a protruding portion which protrudes upward, and a plane portion which extends from the protruding portion; a first conducting layer that is disposed under the film; a second conducting layer that is disposed on a base material and is opposed to the first conducting layer; and a plurality of spacers that are formed on any one of a lower portion of the first conducting layer and an upper portion of the second conducting layer, and are arranged, between the first conducting layer and the second conducting layer, so as to be spaced mutually; wherein an interval between the spacers in an area of the plane portion is formed so as to become narrower than an interval between the spacers in an area of the protruding portion.

A pointing device includes: a film that includes a protruding portion which protrudes upward, and a plane portion which extends from the protruding portion; a first conducting layer that is disposed under the film; a second conducting layer that is disposed on a base material and is opposed to the first conducting layer; and a plurality of spacers that are formed on any one of a lower portion of the first conducting layer and an upper portion of the second conducting layer, and are arranged, between the first conducting layer and the second conducting layer, so as to be spaced mutually; wherein an interval between the spacers in an area of the plane portion is formed so as to become narrower than an interval between the spacers in an area of the protruding portion.

An improved shot sleeve for high pressure die casting of low-iron aluminum silicon alloys and a method of making the shot sleeve, the shot sleeve includes a top portion including a pouring hole and a bottom portion including an impingement site on an inner surface of the bottom portion opposite the pouring hole. The impingement site is constructed of an erosion resistant material. The erosion resistant material is selected from: titanium, tungsten, molybdenum, ruthenium, tantalum, niobium, chromium, vanadium, zirconium, hafnium, boron or a secondary, tertiary or quaternary alloy formed from combination thereof. An erosion resistant insert located at an impingement site of a shot sleeve may accomplish the construction. The insert may be introduced into an internal surface of a conventional shot sleeve or replace a bottom portion of a conventional shot sleeve.

A serial multi-cavity high pressure casting apparatus includes a three stage mold comprising a fixed mold, an operation mold, and a medium mold disposed between the fixed mold and the operation mold, a main sleeve penetrating a lower portion of the fixed mold, and having molten metal injected thereinto, a main runner formed to extend upward from the main sleeve, an auxiliary sleeve branched to both directions from the main runner, an auxiliary runner formed to extend upward from each of both ends of the auxiliary sleeve and connected to each of a first cavity formed between the fixed mold and the medium mold, and a second cavity formed between the medium mold and the operation mold, and a sleeve core disposed on a lower portion of the medium mold, and having the main sleeve, the main runner, and the auxiliary sleeve inserted thereinto.

A die-casting machine has a casting mould, a casting chamber, a casting piston arranged in an axially movable 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. The control unit and the shut-off valve are configured, after completing a filling phase in a subsequent refilling phase firstly to bring the shut-off valve into an open position and to control the casting piston to move back into the casting start position, in order to supply the casting chamber with melt material via the melt inlet channel, and to control the shut-off valve into its closed position again before the casting piston has reached its casting start position by virtue of its return movement, and to control the casting piston to back-suction melt material in the melt outlet channel by virtue of the further return movement of the casting piston.

A die-casting machine has a casting mould, a casting chamber, a casting piston arranged in an axially movable 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. The control unit and the shut-off valve are configured, after completing a filling phase in a subsequent refilling phase firstly to bring the shut-off valve into an open position and to control the casting piston to move back into the casting start position, in order to supply the casting chamber with melt material via the melt inlet channel, and to control the shut-off valve into its closed position again before the casting piston has reached its casting start position by virtue of its return movement, and to control the casting piston to back-suction melt material in the melt outlet channel by virtue of the further return movement of the casting piston.

A mold paint-spraying device includes a frame and a mold fixed to the frame. A motor is fixed to the frame, an output end of the motor is fixedly connected to a mounting rack, a servo motor and a linear guide rail are fixedly connected to the mounting rack, a rail slide is arranged on the linear guide rail, a screw nut is fixed on the rail slide, a spray gun is fixed on the screw nut, and an output end of the servo motor is connected with a screw matching the screw nut.

A casting method includes loading molten metal into a cavity from a sleeve, and sending a gas into the cavity from the outside of the cavity, except the sleeve, to pressurize a gas in the cavity and to increase the pressure value of the gas in the cavity to the atmospheric pressure or higher.

The method can include: using a mold, casting an encapsulation onto a workpiece including solidifying the encapsulation around the workpiece in the mold and extracting the encapsulation from the mold, and cooling the extracted encapsulation using a vortex tube.