According to a casting method, a molten metal is sustained at a sustain position between a casting and the next casting, and the molten metal flow is divided from one pouring gate (44) to a plurality of sprue runners (46 and 47) in the casting. The sprue runners (46 and 47) are branched by a V-shaped portion (45) in a V-shape, and the sustain position of the molten metal is set above (any one of P1, P2 and P4) the V-shaped portion (45). The V-shaped portion (45) is filled with the molten metal while a repeated casting is carried out.

A method including: obtaining a part design file of a part; deriving, from the art design file, a central mold design; determining one or more fill points for the central mold design; and attaching one or more mating connectors to the determined one or more fill points to create a modular part mold file.

A method for manufacturing a mold includes providing first information regarding a location of a shrinkage hole generated during hardening of a molten metal in a shell mold. Second information regarding a change in the location of the shrinkage hole in response to adjustment of a heat transfer rate of the shell mold is obtained. The heat transfer rate of the shell mold is adjusted to shift the shrinkage hole to a predetermined location.

Disclosed herein is a casting cluster for casting a body of a golf club head made of titanium or a titanium alloy. The casting cluster comprises a receptor and a plurality of runners coupled to the receptor and configured to receive molten metal from the receptor. The casting cluster also includes at least twenty-eight main gates. At least two of the main gates are coupled to each of the runners and each main gate is configured to receive molten metal from a corresponding one of the plurality of runners. The casting cluster further comprises at least twenty-eight molds. Each mold of the at least twenty-eight molds is configured to receive molten metal from a corresponding one of the main gates and to cast a body of a golf club head that has a volume of at least 100 cm.sup.3.

A vacuum system for a die casting mold, which forms vacuum inside a cavity formed between a fixed mold and a movable mold, includes: a ventilation assembly disposed between the cavity and a vacuum pump and mounted between the fixed mold and the movable mold and configured to decrease a flow rate of molten metal when the molten metal filled in the cavity flows in; and a vacuum pump forming the vacuum inside the ventilation assembly.

A process for manufacturing a cast metal heat exchanger housing (12) for a vehicle heater having a pot-shape housing wall (14) extending in a direction of a housing longitudinal axis (L) and having a plurality of heat transfer ribs (22) extending on an outer side of the housing wall (14) in the area of a circumferential wall (16) and in the area of a bottom wall (18) of the housing wall (14) in the direction of the housing longitudinal axis (L). The process includes metal casting wherein a sprue cross-sectional area including at least some of the heat transfer ribs (22). The cast metal heat exchanger housing has an axial end face formed upon cutting off metallic material that is essentially at right angles to the housing longitudinal axis and extends into an area of at least some of the heat transfer ribs.

A method for manufacturing a mold includes providing first information regarding a location of a shrinkage hole generated during hardening of a molten metal in a shell mold. Second information regarding a change in the location of the shrinkage hole in response to adjustment of a heat transfer rate of the shell mold is obtained. The heat transfer rate of the shell mold is adjusted to shift the shrinkage hole to a predetermined location.

A pour cup assembly (10) includes a pour cup (12) of frusto-conical shape and which has an inlet end (14), of relatively larger diameter, and an outlet (16), of relatively smaller diameter. The assembly (10) also includes two yokes (18, 20) each including a body section (22) with a part frusto-conical internal profile and opposing arms (24, 26) extending laterally from the body section (22) and that lie in a common plan. Each arm (24, 26) has a bore or hole (30) therein. The body portion (22) has an external profile that is also part frusto-conical in shape and has one or more circumferential grooves (32) in its outer surface. The grooves (32) extend parallel to the arms (18, 20) and transverse to the longitudinal direction of the body portion (22). The grooves (32) in use accommodate a tie element disposed around the body portion (22) and cup (14) to hold the assembly together while the assembly (10) is subsequently coated with ceramic material to form the pour cup assembly. This is typically done at the same time as creating the investment cast around the invested pattern. The arrangement provides a pour cup assembly (10) that can be packaged and transported more efficiently and that can be handled with lifting assistance. The assembly also allows for the use of different sizes of pour cups with the same yokes, making the assembly more versatile.

A casting mould for casting complex-shaped castings from a molten metal. The casting mould has a mould cavity forming the casting and a delivery system that delivers molten metal into the mould cavity. The delivery system includes a sprue, a runner connected to the sprue and a feeder system connected to the runner. The mould cavity is connected to the feeder system or the runner via connections. When seen in the flow direction of the molten metal flowing from the sprue into the runner during the casting operation, the runner has a branch directed away from the sprue along the feeder system and has a directed-back branch adjoining the directed-away branch and guided along the feeder system in the opposite direction to the directed-away branch. The feeder system is connected to both the directed-away branch and the directed-back branch via two or more gates distributed along the respective branch.

A vacuum system for a die casting mold, which forms vacuum inside a cavity formed between a fixed mold and a movable mold, includes: a ventilation assembly disposed between the cavity and a vacuum pump and mounted between the fixed mold and the movable mold and configured to decrease a flow rate of molten metal when the molten metal filled in the cavity flows in; and a vacuum pump forming the vacuum inside the ventilation assembly.