Abstract: The invention has an object to permit to mold metal molds having a thixothropic structure by melting, agitating and weighing, injection molten metal in a melting vessel by combining separately functioning agitation means and injection means. The invention consists in supply granular metal material in a fusion vessel 11 having a weighing chamber 17 by a cylinder of required length communicating with a nozzle port at the extremity section, including rotatively an agitation means 21 inside, and wherein an injection means 22 whose extremity section is formed into an injection plunger 30 is inserted advanceably and retractably into the center section of this agitation means 21. The metal material is heat melted by an external heat. The molten metal material is accumulated in the fusion vessel by homogenizing by the agitation means 21.

Abstract: A new mold solves problems that arise from differential changes in geometry inherent to casting metal in a ceramic mold, by control of the internal morphology between the surfaces of the mold that face the casting, and that face the external environment. Layered fabrication techniques are used to create a ceramic mold. For example, an internal geometry composed of a cellular arrangement of voids may be created within the mold wall. Structures may be designed and fabricated so that the ceramic mold fails at an appropriate time during the solidification and/or cooling of the casting. Thus, the casting itself is not damaged. The mold fails to avoid rupture, or even distortion, of the casting. A thin shell of ceramic defines the casting cavity. This shell must be thin enough to fail due to the stresses induced (primarily compressive) by the metal next to it and partly adherent to it.

Abstract: Methods for increasing the lifetime of a casting slurry are described. One feature of the invention is processing refractory powders at a first hydration level to produce powders having a second, lower hydration level before the processed materials are used to form casting slurries. Processing according to the disclosed methods results in a substantial increase in the lifetime of a slurry made using such processed materials compared to slurries made using materials not processed as described herein. One embodiment of the method comprises heat processing at least one refractory powder, typically refractory powders which have undergone hydration subsequent to commercial production, for a period of time sufficient to reduce the amount of hydration from a first hydration level to a second hydration level. A slurry is formed using the refractory powder at an hydration level which provides an increased slurry lifetime relative to the same material without processing according to the method of the present invention.

Abstract: The present invention relates to an adjusting method for a roller section of a continuous casting machine which is provided with a section input side (6), a section output side (7) and a pair of roller carriers (1, 2) which each carry at least two rollers (3) extending over a supporting zone (4), with the roller carriers (1, 2) being mutually adjusted against one another by way of an adjusting unit arranged at the section input side (6) and at the section output side (7), with each adjusting unit being provided with two hydraulic cylinder units (8 to 11) arranged on either side of the supporting zone (4), characterized in that the hydraulic cylinder units (8 to 11) can be adjusted both in a position-controlled and pressure-controlled manner; the rollers (3) are placed in a position-controlled manner by the hydraulic cylinder units (8 to 11) against a metal billet (5) which is guided by the rollers (3); the hydraulic cylinder units (8 to 11) are changed over from position-controlled to pressure-controlled o

Abstract: Process for making metallic microcylinders from pretreated diacetylenic lipid tubules which includes placing the tubules into an electroless plating bath containing a metal plating reagent, depositing by electroless plating on the surfaces of the tubules enough of a metal to make the tubules electrically conducting, separating the tubules from the plating bath, treating the tubules to remove the lipid and form the metal microcylinders, washing and drying the microcylinders to produce the metal microcylinders having aspect radio of about 12, weight average length of about 20 &mgr;, weight average outside diameter of about 1.5 &mgr;, and weight average wall thickness of about a quarter of one micron.

Abstract: A device for manufacturing an engine block has a casting mold with mold parts and cylinder liners. The mold parts have a seat with seat surfaces for each cylinder liner, and the opposed ends of the cylinder liner are seated in the seat surfaces. The cylinder liners become connected to the material cast in the casting mold and are removed together with the cast material from the mold parts after casting. The seat surfaces are conical and inclined at an incline angle relative to the cross-sectional plane of the cylinder liner seated in the seat such that the opposed ends of the cylinder liner remain seated at the seat surfaces upon heat expansion of the cylinder liner during preparation of the casting mold for casting and during casting.

Abstract: In metallic material injection molding machines, the connection between the injection nozzle and the sprue bushing has tended to leak metallic material. To overcome this problem, the nozzle has been modified to have a projecting portion or spigot that extends into a mating portion of the sprue bushing to form a seal between the respective portion walls. The nozzle and sprue bushing can move axially with respect to one another without loss of sealing whereas with the prior designs any separation between confronting annular surfaces on the sprue bushing and the nozzle would result in a loss of sealing and leakage.

Abstract: A device for directional solidification of a fused metal, for example a CoCrAlY alloy, which has been poured into a molding shell, by moving the molding shell out of a heating chamber and by immersing the molding shell in a liquid-metal bath serving as a cooling melt with a lower melting-point than the fused metal in the molding shell, for example tin. The liquid-metal bath is enclosed by several current carrying toroidal coils arranged coaxially relative to one another. For the purpose of orienting the stream filament of the agitated fused metal one or more guide plates are arranged in the space between the lateral circumferential surface of the molding shell and the inner wall of the shell containing the liquid-metal bath which is located opposite the molding shell.

Abstract: To provide a novel casting mold for use in continuous casting, which has long life and excellent heat resistance, yet capable of completely preventing corrosion, which frequently occurs on the lower portion of the casting mold. A continuous casting mold for steel made from copper or a copper alloy, wherein said casting mold comprises a plane in contact with molten steel partly or wholly covered with a tungsten alloy plating containing either or both of nickel and cobalt, and said plating containing tungsten carbide forming a solid solution therewith. To produce the casting mold above, there is used a plating solution containing either or both of a nickel salt and a cobalt salt and a tungstate, together with at least one selected from an oxycarboxylic acid and salts thereof, and at least one type of an organic compound and salts thereof having two or less of carbon atoms within the molecule, provided that its oxidation decomposition potential is lower than that of the oxycarboxylic acid or a salt thereof.

Abstract: A riser sleeve apparatus (10) for preparing and insulating a passage (14) within which molten metal is accumulated prior to its movement into a mold cavity which includes an inner surface (12) which longitudinally extends between a first end (16) and a second end (18) wherein the inner surface bounds the passage. The riser sleeve further includes an annular lip (20) which is positioned adjacent the second end and extends inward into the passage. When the riser sleeve is positioned about a plug of a pattern, the annular lip deforms to seal the passage at the second end.

Abstract: A process of positioning a riser sleeve about a plug of a mold cavity pattern. The riser sleeve is positioned to engage the plug to prevent sand from entering the interstitial space between the riser sleeve and the plug. The riser sleeve may comprise a deformable annular lip for engagement with the perimeter of the plug. The riser sleeve may engage the plug in sealing relationship.

Abstract: A grain starter capable of nucleating a multiplicity of grains in a casting is positioned within a mold. The mold is filled with molten metal and a solidification interface is caused to pass from the grain starter through the molten metal by immersing the mold in a cooling bath to form a casting that has a multiplicity of grains nucleated by the grain starter.

Abstract: In casting metal objects in casting cavities (2) in moulds (1), connectable to a pressurized mould-filling furnace (5) through a delivery tube (8) and a connector (9), an external riser (13) is connected to and extends upwardly from the junction of the tube (8) and the connector (9). The riser (13) is used as a temporary reservoir in which the level of molten metal is regulated by controlling the gas pressure in space 7 in the furnace (5) such that the filling head, defined as the difference in level between the metal in the casting cavities (2) and that in the external riser (13), is kept constant or made to vary in a desired manner, e.g. so as to cause the level in the cavities to ascend at a substantially constant rate. The invention makes it inter alia possible to produce high-quality aluminum castings in sand moulds, e.g. using automatic foundry equipment of the DISAMATIC® type.

Abstract: A tool, especially for producing molding cores. The tool is disposed in a casting apparatus and is provided with first half-shells (13, 15) and second half-shells (14, 16). Two parting planes are provided, and two casting units are formed from the first and second half-shells. These parting planes are situated one behind the other in the direction of movement of the two casting units.

Abstract: In order to provide a die structure for injection molding of a light alloy free from gas defects, and a method of molding a light alloy parts using the die, the die structure is used for converting a light alloy into a semi-molten state, wherein a solid phase and a liquid phase coexist, or a molten state at a temperature just above a melting point and injecting the molten metal into an interior cavity portion, and S1/S2 of a gate sectional area S1 with respect to a maximum sectional area S2 of the cavity of the mold which area is almost perpendicular to the flowing direction of the melt therein is set in a range of 0.06 to 0.5.

Abstract: A one piece cast wheel having a lightener recess formed in the wheel disc which extends axially beneath the wheel outboard tire bead seat. A method of casting such a one piece wheel which utilizes a multi-piece wheel mold having side members which include a plurality of components. A core for forming the lightener cavity is formed integrally with the side member components. The side member components are sequentially moved relative to each other to release the core from the lightener cavity.

Abstract: A riser topping gathering system and method are disclosed. The system and method are used in gathering riser topping material from the riser cavities of the cope portion of a mold. A capture hood includes high-pressure air outlets and is connected to a duct system, collector and air moving mechanism. The capture hood is moved into contact with the top of the cope mold portion. The air moving mechanism pulls a stream of ambient air over the top of the cope mold portion while high pressure air is pulsed into the riser cavities through the high air pressure outlets. The pulses of high-pressure air activate the riser topping materials and raise them out of the riser cavities and into the path of the ambient air in the capture hood. The moving ambient air carries the riser topping material out of the capture hood and into the duct system. The air and riser topping material is moved to the collector where the riser topping material is separated from the air.

Abstract: The invention relates to a continuous casting device comprising a support structure (16, 116), a swing lever (24, 124) which is pivotally mounted in the support structure (16, 166) around a first pivotal axis a drive mechanism (34, 134) which is connected to said swing lever (24, 124) and a continuous casting shell (14, 114) which can be impinged upon a cooling medium. A bearing (38, 138) to support the continuous cast shell (14, 114) is pivotally mounted on the swing lever (24, 124) around a second pivotal axis, whereby at least one connection for the cooling medium is integrated into the pivoting bearing (38, 138).

Abstract: An integrated plant for the production of elongated metal product of relatively small cross section, such as bars and rods, is described in which the product is initially cast in a pair of continuous casters and conducted along parallel conveyor lines toward a rolling mill which is in-line with one of the conveyor lines. A tunnel furnace operative to heat the product to rolling temperatures contains transfer mechanism for transferring product on the out-of-line conveyor to the in-line conveyor whereby the benefits of substantially continuous rolling of the product is achieved. A method for operating the plant is also described.

Abstract: A tumbling unit such as a casting shake-out unit, rotary media drum, sand reclaimer or the like, is provided. The tumbling unit includes a cylindrical outer shell and a cylindrical inner shell. The inner liner is formed of a series of interfitting segments. The segments each have an inner surface, an outer surface, side edges, a front edge, a back edge, and rifling extending from the outer surface. The side edges of the segments have a groove formed therein which extends the length of said the edges. The grooves of neighboring segments define channel between the segments. The pin is received in the channel to urge the neighboring segments apart to form a tight interfit among the segments in a row of the liner. The retaining pin has a body having side surfaces, a top surface, and a bottom surface. A rib extends along each side surface which is shaped and sized to be received in the grooves of the neighboring segments. An arm extends upwardly from the pin body top surface.