A low-pressure sand-casting system includes a sand-casting mold receiving a molten casting material to cast an automobile vehicle cylinder head. A port is created in the automobile vehicle cylinder head. A manifold port metal core assembly includes a metal core. A compressible material coating is applied on the manifold port core metal core.

A mold construction system is presented for use in additive manufacturing of a metal object. The system comprises: at least one mold provision device controllably operable to form one or more mold regions defining one or more respective object regions in a production layer, and configured to receive molten metal deposited to each object region; and a control system operating each mold provision device in accordance with a predetermined building plan. The mold provision device, in accordance with said predetermined building plan, creates each mold region of each production layer with at least one metal-facing zone configured to define at least one cavity forming the object region to receive the molten metal therein. The metal-facing zone comprises a predetermined arrangement of spaced-apart sites of relatively weak mechanical properties relative to spaces between said sites within said mold material. The arrangement of the spaced-apart sites is selected in accordance with properties of the metal object and molten metal deposition.

A mold construction system is presented for use in additive manufacturing of a metal object. The system comprises: at least one mold provision device controllably operable to form one or more mold regions defining one or more respective object regions in a production layer, and configured to receive molten metal deposited to each object region; and a control system operating each mold provision device in accordance with a predetermined building plan. The mold provision device, in accordance with said predetermined building plan, creates each mold region of each production layer with at least one metal-facing zone configured to define at least one cavity forming the object region to receive the molten metal therein. The metal-facing zone comprises a predetermined arrangement of spaced-apart sites of relatively weak mechanical properties relative to spaces between said sites within said mold material. The arrangement of the spaced-apart sites is selected in accordance with properties of the metal object and molten metal deposition.

A mold construction system is presented for use in additive manufacturing of a metal object. The system comprises: at least one mold provision device controllably operable to form one or more mold regions defining one or more respective object regions in a production layer, and configured to receive molten metal deposited to each object region; and a control system operating said at least one mold provision device in accordance with a predetermined building plan. The mold provision device is controllably operable, in accordance with said predetermined building plan, to create each mold region, in each production layer, with one or more metal-facing zones and one or more metal-nonadjacent zones around the metal-facing zone. Each metal-facing zone is configured to define a cavity forming the object region to receive the molten metal therein, and is configured with higher compressibility relatively to at least a sub-zone of the metal-nonadjacent zone.

A mold construction system is presented for use in additive manufacturing of a metal object. The system comprises: at least one mold provision device controllably operable to form one or more mold regions defining one or more respective object regions in a production layer, and configured to receive molten metal deposited to each object region; and a control system operating said at least one mold provision device in accordance with a predetermined building plan. The mold provision device is controllably operable, in accordance with said predetermined building plan, to create each mold region, in each production layer, with one or more metal-facing zones and one or more metal-nonadjacent zones around the metal-facing zone. Each metal-facing zone is configured to define a cavity forming the object region to receive the molten metal therein, and is configured with higher compressibility relatively to at least a sub-zone of the metal-nonadjacent zone.

A refractory metal core laminate assembly, comprising: a first refractory metal core layer having exterior surfaces and a first side and a second side opposite the first side; a second refractory metal core layer having exterior surfaces and a first side and a second side opposite the first side, the second refractory metal core layer being arranged above the first refractory metal core layer with the second refractory metal core layer first side facing the first refractory metal core layer second side; a layer of a powder bed material between the first refractory metal core layer second side and the second refractory metal core layer first side; and a coating of the powder bed material coupled to the first refractory metal core layer exterior surfaces and the second refractory metal core layer exterior surfaces.

A turbine system includes a turbine shroud segment. The turbine shroud segment includes a backside, a flow path surface opposite to the back side and configured to be disposed adjacent a hot gas path of the turbine system, and side walls extending between the backside of the turbine shroud segment and the flow path surface of the turbine shroud segment. The turbine shroud segment also includes cooling channels disposed in a thickness of the turbine shroud segment between the backside and the flow path surface, where each cooling channel includes an outlet at one of the side walls of the turbine shroud segment.

A turbine system includes a turbine shroud segment. The turbine shroud segment includes a backside, a flow path surface opposite to the back side and configured to be disposed adjacent a hot gas path of the turbine system, and side walls extending between the backside of the turbine shroud segment and the flow path surface of the turbine shroud segment. The turbine shroud segment also includes cooling channels disposed in a thickness of the turbine shroud segment between the backside and the flow path surface, where each cooling channel includes an outlet at one of the side walls of the turbine shroud segment.

The invention relates to a refractory coating composition for producing mold coatings on non-permanent molds or on cores for the casting of iron and steel, comprising a) an alkali metal salt or alkaline earth metal salt of carbonic acid and/or an alkali metal salt or alkaline earth metal salt of diphosphoric acid, b) a carrier liquid and c) refractory materials.

The invention relates to a refractory coating composition for producing mold coatings on non-permanent molds or on cores for the casting of iron and steel, comprising a) an alkali metal salt or alkaline earth metal salt of carbonic acid and/or an alkali metal salt or alkaline earth metal salt of diphosphoric acid, b) a carrier liquid and c) refractory materials.