Provided herein is a system, apparatus, and method for venting a direct chill casting mold by venting excess casting gas and retaining oxide from atop a casting during the direct chill casting process. Methods of venting casting gas from a direct chill casting mold include: supplying the direct chill casting mold with molten metal through a transition plate; supplying a casting gas through a casting surface of the direct chill casting mold; venting the casting gas from a gas pocket in the transition plate, wherein venting the casting gas from the gas pocket in the transition plate is performed in response to a pressure of the casting gas in the gas pocket reaching a predetermined pressure.

A mold processing system includes a conveyance line intermittently conveying a mold with a predetermined standstill time, a processing apparatus, a conveyance apparatus conveying the processing apparatus along the conveyance line, and a control unit, wherein the control unit controls the conveyance apparatus to set the processing apparatus at a position corresponding to a first position on the conveyance line and controls the processing apparatus to perform a part of the process on the mold conveyed to the first position, and the control unit controls, after completion of the part of the process, the conveyance apparatus to move the processing apparatus to a position corresponding to a second position and controls the processing apparatus to perform the rest of the process within the standstill time.

An aluminum casting method is for pouring an aluminum molten metal (12) pumped up by an electromagnetic pump (20) into a die (50). A thickness of a powder demolding agent applied to the die (50) is set to be thinner than that of a demolding agent for a gravity die casting. A temperature of the die immediately before the molten metal is poured is controlled so as to fall within a range that is between 110° C. to 250° C. A temperature of the molten metal when poured is controlled to be a value obtained by adding 20° C. to 55° C. to a liquidus-line temperature of the aluminum.

An apparatus for the die casting in the semisolid state of objects made of brass, bronze, alloys of aluminum, magnesium and light alloys and the like, includes an upper die part adapted to be mated with a lower die part, the mating between the upper die part and the lower die part forming a casting cavity, a furnace being arranged below the lower die part and being provided with a duct for feeding liquid metal which connects to the casting cavity. The upper die part is provided with a cavity in which a forging piston can move freely, the piston accommodating internally a flow control plunger, and having, between the upper die part and the lower die part, circumferentially around the part to be cast, a vacuum channel connected to the casting cavity by at least one venting channel.

A venting device for venting a casting mold in the form of a chill vent having two mold halves which oppose each other and are complementary to each other in form and function, each mold half having a plurality of elevations and indentations in the areas facing each other and the elevations of one mold half engaging with the indentations of the second mold half, and a gap being formed between the two mold halves when the mold halves are placed on each other, air and surplus molten material flowing out through said gap when the casting mold is being filled, the gap having, in the flow direction of the molten material, a saw-toothed course having several sawtooth portions disposed in a row in the flow direction, each sawtooth portion having a leading edge inclined in the flow direction and a trailing edge inclined against the flow direction.

A casting mold is provided with a cavity portion and an overflow portion, and the overflow portion is connected to a gas flow path (suction path). A valve (an on-off valve, a shut-off valve) is provided between the gas flow path and the overflow portion. A heating method for a casting mold includes a step of setting the pressure in the cavity portion to a second pressure by sucking gas in the overflow portion and in the cavity portion while the valve is kept open for a second time period shorter than a first time period during casting. The heating method further includes a step of heating the casting mold by supplying molten metal into the cavity portion set at the second pressure, and solidifying the molten metal.

A number of variations may include at least one mold portion that may define a first cavity, a circular gating system, and at least one sprue. The circular gating system may surround the first cavity and define a continuous in-gate from the circular gating to the first cavity. The at least one sprue and at least one vent may be in fluid communication with the circular gating system and the first cavity.

A low-pressure casting device is provided with a holding furnace, a stoke, a pressure control device and a molten-metal level sensor. The holding furnace holds molten metal. The stoke supplies molten metal into a casting mold via a sprue. The pressure control device moves the molten metal in the stoke and fills the molten metal in the casting mold. The molten-metal level sensor detects a surface level of the molten-metal in the stoke. The stoke has a lower end immersed in the molten metal in the holding furnace. The low-pressure casting device is configured to correct filling of the molten metal in the casting mold in a next casting based on the height of the molten metal surface detected by the molten-metal level sensor.

A gas suction device of a casting mold includes an overflow portion, a suction path, and a shut-off valve. The shut-off valve includes a housing section for housing a valve element. An upstream-side housing portion of the housing section has an arc-shaped outer peripheral edge. The overflow portion includes an introduction path which is continuous with the upstream-side housing portion and guides gas to the upstream-side housing portion. At a predetermined location on the outer peripheral edge, the introduction path is connected to the upstream-side housing portion along the tangential direction of the outer peripheral edge.

An exhausting device of a low-pressure aluminum alloy wheel casting mold, which includes a control mainframe, a connecting line, a gas storage station, a ventilating pipeline, gas inlet plugs, an exhausting plug and the like, the control mainframe is connected with the gas storage station through the connecting line, and the gas storage station is connected with the gas inlet plugs through the ventilating pipeline; the gas inlet plugs are arranged at the bottom mold window; the mold filling process of the high-temperature molten aluminum can be completed in a relatively oxygen-free environment, direct contact between the molten aluminum and oxygen is avoided, and the occurrence probability of the oxidation slag inclusion defect in the wheel casting process is effectively controlled, so that the internal quality of the casting is remarkably improved.