Abstract: A first cavity is formed between a mold and a core. One of a cylinder block material and a liner material is supplied to the first cavity. A second cavity is formed by expanding or shrinking the core or replacing the core with another core. The other of the cylinder block material and the liner material is supplied to the second cavity. The cylinder block with a liner is produced successively using the same apparatus.

Abstract: A structure of CO.sub.2 -insoluble material has a three-dimensional object of CO.sub.2 -soluble material positioned inside. The object is contacted with a fluid containing carbon dioxide which dissolves the object in the fluid. The fluid is then removed to form a cavity in the structure.

Abstract: The assembly includes plural independently operated rotating shafts that contact the sand fill. As the fill is introduced into a first end of the vertical chute, the speed and rotational direction of the shafts with accompanying tines are controlled to regulate the feed rate and discharge of the fill to a molding chamber. This arrangement provides a more uniform density in the molding chamber which, in turn, results in improved quality in the cast product.

Abstract: A nail polish or nail polish/enamel composition is applied to imperfections, errors, distortions or porosities in the model. The composition is thus used to correct the model's shape. The composition can be added at room temperature, and avoids the need to utilize high temperatures in the process of building the model. The nail polish or nail polish/enamel compositions may be utilized to add jewelry design elements to the model.

Abstract: A mother strip with a metallically pure surface is passed through a melt bath of a metal and whereby the coating is smoothed by rolling immediately after leaving the melt bath. The mother strip, having been preheated, to a temperature clearly above ambient temperature, especially above 200.degree. C., is introduced into the metal bath. The preheating is carried out by indirect heat exchange with the melt bath in an oxygen-free environment. The melt freshly supplied to the melt bath has an increased temperature in accordance with the heat lost due to preheating.

Abstract: A wax article pattern having a cavity corresponding to a cavity in a metal article is provided. The cavity in the wax article pattern is filled with a slurry of ceramic core material. The slurry of ceramic core material is solidified to form a core. The wax article pattern is enclosed by ceramic mold material. The ceramic mold material is solidified to form a mold. The wax pattern is removed from the mold to leave an article mold cavity. The article mold cavity is filled with molten metal which is solidified to form the metal article. A passage in the metal article may be formed by a pin which extends from the wax article pattern into the cavity in the wax article pattern and is enclosed by the slurry of ceramic core material.

Abstract: A thin slab that is free of internal cracks is formed by reducing a continuously cast strand having a liquid core. The placement of the reduction rolls is controlled to effect a suitable amount of reduction. The methods effectively reduce bulging strain, as well as strain associated with reduction of the strand. As a result, total accumulated strain is reduced and a thin slab free of internal cracks can be manufactured at high speeds. The apparatus includes reduction blocks which are capable of shifting the rotation angle of an upper roller segment frame. Misalignment strain is reduced and the thickness of the strand can be changed without stopping the manufacturing operation.

Abstract: The device includes a cavity defined by a fixed die and a movable die; a plunger disposed in a runner connected to the cavity in such a manner as to be movable to and from a gate of the cavity; a molten metal inlet formed midway in the runner; wherein molten metal supplied from the molten metal inlet in the cavity is pressurized by the advance of the plunger. This die device further includes an auxiliary die unit having a runner and a molten metal inlet connected to the cavity, which is disposed in a border of the fixed die; wherein excessive solidified metal is produced in the vicinity of the molten metal inlet of the auxiliary die unit.

Abstract: The drag flask has at least two opposed sides which include recesses proximate the matchplate. Manifolds are provided in the recesses to communicate compressed air from a source of compressed air to air inlets provided in the manifold. The manifolds are separated from the recesses using an elastomeric seal which is contoured to direct the compressed air between an air passage disposed between the drag mold and the matchplate. When incorporated into a sand mold forming machine, sensors are positioned on the sand mold forming machine to detect when the drag flask has reached a releasing position to thereby cause the source of compressed air to inject air into the manifold and air passage for release of the drag mold from the drag flask.

Abstract: An improved continuous casting mold and foot guide assembly includes a mold having a casting passage defined therein, a frame member, mounting structure for mounting the frame member to the mold for relative movement toward and away from an axis of the casting passage, and a strand support member for providing support to a strand of continuously cast material as it emerges from the casting passage. Biasing structure is provided for biasing the frame member toward the axis of the casting passage and, advantageously, is positioned so as not to occupy space that is behind the frame member. As a result, the assembly is compatible with all models of casting machines and will be less susceptible to degradation as a result of radiant heat and steam that is emitted from the strand during operation. In addition, a load cell is provided for monitoring the amount of relative force between the frame member and the strand during operation.

Abstract: Balance beams are pivotally mounted on and crosswise of an elongated rack extending parallel to a trough over a series of mold cavities, valve closure devices are suspended from corresponding first end portions of the beams to throttle valve openings in the trough, float sensors are suspended from points on the opposing second end portions of the beams to contact the surfaces of molten metal columns brought to a state of equilibrium in the cavities, and the rack is elevated in relation to the cavities as molten metal is delivered to the trough, so that as the first end portions impose a desired value on the rate at which the surfaces escalate up the axes of the cavities, the second end portions elevate the suspension points for the sensors at a rate commensurate therewith, to assure that the input signals transmitted to the first portions through the fulcra for the beams, are consistent with the imposed value.

Abstract: An application method of a powder mold lubricant for a vacuum die-casting mold can effectively apply the powder mold lubricant onto a mold surface of the mold cavity with supplying the powder mold lubricant in small amount, can avoid liquefying of the power mold lubricant to degrade quality of a product, and can avoid loss in cycle time in a vacuum die-casting operation.

Abstract: In a method for applying a powder state mold lubricant onto a die-casting mold, a movable mother die and a stationary mother die are clamped to define a mold cavity with a movable insert die and a stationary insert die, in which a plunger tip slidably arranged within a sleeve opens a molten material supply hole, and communication between the sleeve and the mold cavity is blocked. A pressure within the mold cavity is reduced by opening a powder suction passage opening into the mold cavity and establishing communication between a powder discharge passage communicated with a powder storage source and a molten material supply passage opening to the mold cavity. The powder state mold lubricant is directly within the powder storage source into the mold cavity via the molten material supply passage for applying the powder state mold lubricant on the mold surface of the mold cavity.

Abstract: The apparatus includes a rubber base with two inlets, a two-chamber ceramic crucible with two identical outlets, and a model of the jewelry item with two sprues connected to two separate tree stems, with each sprue connected to a separate stem thus ensuring flow of different colors or different metals. Simultaneous casting of two different metal alloys of different colors in two separate chambers of the crucible is achieved by using a specially constructed two-head torch.

Abstract: The casting roll includes a hub (2) and a shell (3) which are arranged coaxially, and two flanges (5, 6) for supporting and radially centering the shell on the hub. Each flange includes a frustoconical part (51, 61) which cooperates with a corresponding frustoconical surface (34, 35) of the bore in the shell, the frustoconical surface being located in a region (A) where the internal diameter variations of the shell due to the expansion deformations are substantially zero.

Abstract: An interior cooling inner plunger is caused to project from an outer plunger after casting. Alternatively, during casting, while it projects from the outer plunger, the inner plunger is inserted into a frustoconical gate. Subsequently, a pressure pin is moved downward from a movable mold side to a portion near a gate portion. When a melt solidifies, a casting sleeve and a casting plunger are moved downward, and a pressure pin is further moved downward to cut apart a biscuit from a mold product. An excellent product is produced and the cycle time is shortened by a good melt pushing operation.

Abstract: The method enhances the quality of cast metal being cast in a continuous casting process. In particular, the method combines temperature and quality control sensing to achieve closed-loop control of the cooling of molten metal in a continuous caster.

Abstract: A titanium aluminide is composed of 31.5 to 33.5 weight % of Al, 1.5 to 2.3 weight % of Fe, 1.5 to 2.1 and 3.7 to 4.8 weight % of Nb, 0.07 to 0.12 weight % of B with remainder being Ti and inevitable impurities. The 1.5-2.0 weight % of Nb may be replaced with 0.5 to 2.0 weight % of V if severe oxidation resistance is not necessary. The titanium aluminide is melted and poured into a mold, and the melt is cooled in the mold naturally.

Abstract: In a string of molds (32) with vertical parting surfaces, each mold cavity (35) is connected through a wide throat with its own after-feeding reservoir (36). When the mold has been poured, a gas pressure is applied through a channel (43) and a passage (41) to a lower metal surface in the after-feeding reservoir (36). This gas pressure is not allowed to exceed the metallostatic pressure in the mold at the surface, at which the pressure is applied, until the metal in the ingate (37) has solidified or the ingate has been blocked in some other way. At the location where the passage (41) opens into the after-feeding reservoir, it is covered by an element (42) that is impermeable to the metal having been poured but permeable to the pressurized gas. When the metal in the ingate (37) has solidified or the ingate has been blocked in some other way, the gas pressure may be increased.

Abstract: Used foundry sand is divided into two falling streams and the grains of a first falling stream are accelerated and diverted into the second falling stream.