A cast mold fabricating device supplies thickener-coated sand and steam into a mold forming die at an optimum timing to shorten a mold fabrication time. The device includes the die 2 with an injection inlet 1, a sand supply head 4 for supplying and filling the thickener-coated sand 3 into the die, a steam supply head 5 for supplying steam into the die 2 to solidify and/or cure a thickener of the sand by application of heat of the steam. The device further includes a vertical drive 6 for lowering the sand supply head 4 to a position where the injection inlet 1 is connected to a sand nozzle 8 of the sand supply head 4, and a horizontal drive 7 for advancing the steam supply head 5 to a position where the injection port 1 is connected to a steam nozzle 9 of the steam supply head 5.

A system including a container for holding a photosensitive medium adapted to change states upon exposure to a light source, an optical imaging system, configured to move above the container holding the photosensitive medium, and having the light source, and a control system configured to: slice a digital model of a three-dimensional object into a slice having a cross-section, generate a build cross-section by filling a two-dimensional image with one or more copies of the cross-section, add to the build cross-section a conformal lattice to fill space in the build cross-section around the one or more copies of the cross-section, and control movement of the optical imaging system above the container to cure a portion of the photosensitive medium corresponding to the build cross-section to produce a layer of a three-dimensional object.

A system including a container for holding a photosensitive medium adapted to change states upon exposure to a light source, an optical imaging system, configured to move above the container holding the photosensitive medium, and having the light source, and a control system configured to: slice a digital model of a three-dimensional object into a slice having a cross-section, generate a build cross-section by filling a two-dimensional image with one or more copies of the cross-section, add to the build cross-section a conformal lattice to fill space in the build cross-section around the one or more copies of the cross-section, and control movement of the optical imaging system above the container to cure a portion of the photosensitive medium corresponding to the build cross-section to produce a layer of a three-dimensional object.

A method for manufacturing a compressor impeller wherein the compressor impeller is cast using a mold. As a first alternative, the mold is made using 3D printing. As a second alternative, a model of the compressor impeller is made using 3D printing, and the mold is then made on the basis of said model.

The subject of the invention is a process for the production of at least partly thin-walled and aluminium castings with sand moulding technology by gravity casting, which allows producing casts with 100 times or favourably 200-400 times larger overall dimensions in case of 1-3 mm wall thickness. The main idea of the process is that sand mould containing mould cavity is provided, melt of aluminium content is produced, the melt is introduced into the mould cavity at several points through a gating system of narrowing cross section. A further subject of the invention is a sand mould fitted with a gating system to produce at least partly thin-walled castings with sand moulding technology, by gravity casting. The wall thickness of thin-walled segments is 1-3 mm and the largest dimension is more than a 100 but favourably at least 200-400 multiple of the wall thickness. The main idea behind the sand mould with a gating system is that it contains a mould cavity allowing the production of at least partly thin-walled castings, and is equipped with a gating system, which is composed of at least two sprues and one ingate to each having a porthole into the mould cavity and in liquid contact with the sprues.

The subject of the invention is a process for the production of at least partly thin-walled and aluminium castings with sand moulding technology by gravity casting, which allows producing casts with 100 times or favourably 200-400 times larger overall dimensions in case of 1-3 mm wall thickness. The main idea of the process is that sand mould containing mould cavity is provided, melt of aluminium content is produced, the melt is introduced into the mould cavity at several points through a gating system of narrowing cross section. A further subject of the invention is a sand mould fitted with a gating system to produce at least partly thin-walled castings with sand moulding technology, by gravity casting. The wall thickness of thin-walled segments is 1-3 mm and the largest dimension is more than a 100 but favourably at least 200-400 multiple of the wall thickness. The main idea behind the sand mould with a gating system is that it contains a mould cavity allowing the production of at least partly thin-walled castings, and is equipped with a gating system, which is composed of at least two sprues and one ingate to each having a porthole into the mould cavity and in liquid contact with the sprues.

An investment casting system includes a core having at least one fine detail, a shell positioned relative to said core, and a strengthening coating applied at least to the at least one fine detail.

An investment casting system includes a core having at least one fine detail, a shell positioned relative to said core, and a strengthening coating applied at least to the at least one fine detail.

A flaskless molding machine includes: an upper sand tank storing the mold sand to be supplied to the upper molding space; a first lower sand tank storing the mold sand to be supplied to the lower molding space, and having a first communication port for discharging the stored mold sand; a second lower sand tank having a second communication port capable of communicating with the first communication port of the first lower sand tank, and storing the mold sand supplied from the first lower sand tank and to be supplied to the lower molding space; at least one first guide member extending in a vertical direction, and guiding the upper flask, the lower flask and the second lower sand tank in the vertical direction; and a second guide member extending in the vertical direction, and guiding the first lower sand tank in the vertical direction.

A flaskless molding machine includes: an upper sand tank storing the mold sand to be supplied to the upper molding space; a first lower sand tank storing the mold sand to be supplied to the lower molding space, and having a first communication port for discharging the stored mold sand; a second lower sand tank having a second communication port capable of communicating with the first communication port of the first lower sand tank, and storing the mold sand supplied from the first lower sand tank and to be supplied to the lower molding space; at least one first guide member extending in a vertical direction, and guiding the upper flask, the lower flask and the second lower sand tank in the vertical direction; and a second guide member extending in the vertical direction, and guiding the first lower sand tank in the vertical direction.