A structure for manufacturing a cast article includes an organic component, at least a portion thereof being an organic fiber. The structure has a mass reduction rate of 1 mass % or greater to less than 20 mass % when heated under nitrogen atmosphere at 1000 C. for 30 minutes. The cast-article-manufacturing structure includes an inorganic particle. The cast-article-manufacturing structure includes, as the inorganic particle, a first inorganic particle having a predetermined shape and/or physical property, and a second inorganic particle having a predetermined shape and/or physical property different from the first inorganic particle. In addition thereto or instead thereof, the cast-article-manufacturing structure has a maximum bending stress of 9 MPa or greater measured in conformity with JIS K7017, and a bending strain of 0.6% or greater at the maximum bending stress.

The invention relates to a method for producing a mold part (26, 26) with a feeder insert arranged in it, with a sprue for liquid metal, for a divisible casting mold for metal casting, with the following steps: producing or providing a mold part (26, 26) equipped with a closed feeder insert (2, 2) from a compacted molding material (28), the closed feeder insert (2, 2) being arranged fixed in place in the compacted molding material (28) of the mold part (26, 26) and having a feeder opening (10, 10) connected to regions of the mold cavity (30, 30) that is to be formed, and opening the closed feeder insert (2, 2), so that a sprue (32, 32) for liquid metal is formed.

A sand casting mold configured to cast a component and a method of forming the sand casting mold configured to cast the component by 3D printing are disclosed. The sand casting mold includes: an upper portion and a lower portion; a mold cavity defined by the upper portion and the lower portion; an upper sprue in the upper portion; a lower sprue which is in the lower portion and is in communication with the upper sprue; an upper runner which is in the upper portion, is separated from the upper sprue by a predetermined distance, and is in communication with the mold cavity; and a lower runner which is in the lower portion, is in communication with the lower sprue, is separated from the mold cavity in the lower portion, and has a first end in communication with the lower sprue, and a second end in communication with the upper runner. With the sand casting mold configured to cast the component according to the embodiments of the present invention, for example, a production cost can be reduced.

A method and system of casting an integral multi-way valve based on 3D printing belong to the technical field of valve casting. The casting method and system determine, according to structural parameters of an integral multi-way valve to be cast, a plurality of ingates on a plurality of layers, a plurality of runners connecting the ingates on each layer, and a sprue connecting the plurality of runners, and an integral sand mold is printed by using the 3D printing technology to realize a multi-layer composite casting method and a corresponding casting system.

The disclosure discloses a sprue spreader surface treatment method, which comprises the following steps: preheating the sprue spreader, and carrying out laser scanning on the sprue spreader by using a laser; cleaning the surface of the sprue spreader, drying it by hot air, and polishing the surface to be bright by pneumatic polishing; and cleaning the surface of the sprue spreader again and drying it by hot air, so that the operation is simple, the cost is low, the bonding strength is high, the energy is saved, the environment is protected, and the service life of the sprue spreader can be prolonged.

A cluster model and a shell for the production, by lost wax casting, of a plurality of turbomachine elements, are provided. The shell includes a central sprue that is fluidly connected to a casting cup for receiving molten metal; a plurality of shell elements; a plurality of bottom feed conduits for the shell elements; and a handling accessory shell that is independent of the plurality of shell elements and of their metal supply circuit, such that there is no fluid connection to the shell elements. The handling accessory shell is fluidly connected to the central sprue so as to allow top-pour casting of the handling accessory shell.

A die casting apparatus according to an aspect of the present disclosure includes a sleeve 30 to which molten metal is supplied, and dies 10 and 20 configured to form a cavity C, in which the molten metal supplied to the sleeve 30 is injected into the cavity C through a runner R linking the sleeve 30 with the cavity C. A plurality of protrusions 22 are provided in the runner R, the plurality of protrusions 22 extending in a direction in which the molten metal flows and being arranged in a comb-teeth arrangement in a width direction of the runner R.

A vehicle support structure formed by casting, the vehicle support structure includes a main body part attached to a vehicle side, a plurality of support portions extending from the main body part to support vehicle components, and a plurality of rib portions configured to connect the support portions and the main body part, respectively. A lightening portion is formed by casting at least in one of the rib portions. An external component mounting portion is formed in the lightening portion.

The present invention relates to a riser sleeve (1) for using when pouring metals into a casting mould, comprising a riser body (2), comprising a riser cavity (3) for holding liquid metal and a riser opening (4) for joining the riser cavity (3) to a mould cavity of the casting mould during the casting process,
wherein the riser cavity (3) has a greater diameter than the diameter of the riser opening (4) in at least one portion, the riser body (2) is made of an insulating and/or exothermic riser material, the riser body (2) is formed as a single piece, the riser opening (4) defines an axis (5), and the riser cavity (3) is asymmetric to the axis (5).

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.