Abstract: A modular fastening system which is integrally molded as part of a plastic member which is being fastened to another member is disclosed. The fastening system comprises a locking member and a movable positioning means for selectively permitting the locking member to move between locked and unlocked positions. The position means is connected to the plastic member during the molding process and easily broken away during the assembly process and positioned in the plastic member to complete the fastening process. Because the positioning means is molded as an integral part of the plastic member, no loose fasteners or additional pieces are required.

Abstract: The invention relates to a coupling for fixedly, i.e. non-flexibly, connect free ends of two shaft together. The connection is releasable. A typical field of application is in pumps. The coupling has one generally cylindric, solid muff adapted to be fixedly secured to one shaft. The other muff is split in two, along a plane parallel with the axis of the respective shaft. All parts are made free of play when they are secured to the shafts. The invention facilitates maintenance work, e.g. in replacement of packing rings in a pump. It also facilitates the manufacture of the coupling.

Abstract: A composite material comprises a body, e.g., a slab, of a fused refractory oxycompound (3) having a multiplicity of discrete inclusions such as lumps (1) of an aluminum-wettable RHM in its surface. These bodies are especially useful as aluminum-wettable but non-current carrying components of aluminum reduction cells.

Abstract: Multipurpose mould (10) which cooperates with a discharge roller conveyor (13) having a first removable segment (14) and which can cooperate with an electromagnetic stirrer (21) and also can form part of a plurality of casting lines. The mould (10) includes one or more level control systems (24-25) to control the level of liquid metal, a crystallizer (16) , a jacket (18) defining an interspace (50) for the accelerated flow of a cooling fluid, an outer sidewall (19) to form at least one chamber (17) and a closure bottom (22). The outer sidewall (19) has at least in its second lower part a substantially circular enclosure (20) for the external lodgement of the electromagnetic stirrer (21) supported and positioned on the closure bottom (22). The closure bottom (22) has at its lower end positioner (34) mating with positioning guide-block supports (36) included substantially above the first removable segment (14).

Abstract: A pivotable joint including a first part provided with pivot bores and a second part with resiliently mounted pivot pins received in said pivot bores such that the second part is pivotably mounted in a desired assembled position. The first part has a closed tubular cross section and may be a section of the intake manifold of an internal combustion engine. The resiliently mounted pivot pins are symmetrically mounted on opposite sides of the second part, which may be a throttle valve. The pivot pins are elastically displaceable axially during assembly of the first and second parts such that they snap resiliently into the pivot bores of the first part when the second part reaches the desired assembled position.

Abstract: The present invention pertains to an apparatus for casting which includes a melt chamber within which a metal is disposed. The melt chamber includes means for melting the material. A mold chamber is disposed beneath the melt chamber comprised of a mold defining a mold cavity within which the metal is formed and a preform is disposed. There is also a riser cavity fluidically connected to the mold cavity for holding a charge of melted metal. There is also provided means for fluidically connecting the melt chamber to the mold chamber and a valve element for controlling the flow of metal through the connecting means such that when the connecting means is opened, the chambers are fluidically connected and when the connecting means is closed, the chambers are fluidically isolated. The mold chamber has means for evacuating the mold chamber and means for pressurizing the mold chamber such that the melted metal disposed within the riser cavity is forced into the preform.

Abstract: A pressure-casting machine that contains a delivery system, which comprises: a molten metal pouring pipe made of a refractory, having a length of at least 4 m and an outside diameter of at least 350 mm, and arranged such that an upper end thereof is attached substantially vertically from below to an opening in a bottom wall of a mold for a pressure-casting machine, and a lower end thereof extends through a lid of a closed vessel arranged below the mold and is immersed into molten metal received in a ladle arranged in the closed vessel. The molten metal pouring pipe comprises at least two pipe sections connected to each other in series and in a liquid-tight manner by means of a threaded joint, tapered surfaces provided with screw threads of which have an inclination angle within a range of from 2.0.degree. to 15.0.degree. relative to the center axis of the molten metal pouring pipe.

Abstract: A method of producing a metal mold is disclosed. A heat resistant sheet is forcedly brought into close contact with a product configuration surface of a matrix such as a wooden pattern, a resin model, or the like by making use of negative pressure. The matrix is brought into contact with a melt of a low melting-point alloy while that state of close contact is being maintained and the melt is allowed to cool as it is, thereby casting one part of the mold which makes up a pair. The matrix is then removed, and by using the one part of the mold thus cast as a new matrix, this new matrix is brought into contact with the melt of a low melting-point alloy via the heat resistant rubber sheet and is allowed to cool as it is, thereby casting a counterpart of the mold that makes up the pair.

Abstract: The present invention relates to a novel process for forming a filler material which can be used in various metal matrix composite formation processes for forming metal matrix composite bodies. Particularly, an infiltration enhancer or an infiltration enhancer precursor or an infiltrating atmosphere are in communication with a filler material or a preform, at least at some point during the process, which permits molten matrix metal to spontaneously infiltrate the filler material or preform. Such spontaneous infiltration occurs without the requirement for the application of any pressure or vacuum. The amount of matrix metal provided is sufficient only to coat, to a desired thickness, substantially all of the filler material. The coated filler material is thereafter comminuted for use in any desired metal matrix composite formation process.

Abstract: A casting machine having a mold closing and opening cylinder for moving a movable die plate with a movable die relative to a stationary die plate having a stationary die, and a mold clamping cylinder each having a cylinder housing and a piston which partially define a first and a second fluid chamber whose volumes increase when the movable die plate is moved toward and away from the stationary die plate, respectively, by the mold closing cylinder. The clamping cylinder is connected to a hydraulic circuit, which permits a fluid to flow between the first and second chambers through a connecting line when the movable and stationary die plates are moved relative to each other by the closing and opening cylinder. The hydraulic circuit is adapted to apply a fluid pressure to the first fluid chamber to clamp the movable and stationary dies together after the movable die is brought into abutting contact with the stationary die by the closing and opening cylinder.

Abstract: A continuously cast slab of Fe-Ni series alloy comprising 30-50 wt % of Ni or further 0.001-0.03 wt % of B and the balance of Fe is controlled to an eqiaxial crystal ratio of 20% or 30% in accordance with the existence or nonexistence of B content in the continuous casting and, if necessary, subjected to an electromagnetic stirring treatment or the like for controlling the eqiaxial crystal ratio and then heated at a temperature of not lower than 950.degree. C., 1000.degree. C. and 1100.degree. C. to economically produce Fe-Ni series alloys having improved effect for restraining streaks during etching.

Abstract: A cover to cover the upper rail of a railing. The upper rail has a top, bottom and side. The cover has a curved top with a concave inner surface to be positioned adjacent the top of the rail. The longitudinal ribs on the inner surface. The side walls to be positioned adjacent the sides of the upper rail. There are flanges on the bottom of the side walls to contact the bottom of the rail to locate the cover on the rail.

Abstract: A method for the electroslag refining of metal is provided. The method involves providing a refining vessel to contain an electroslag refining layer floating on a layer of molten refined metal. An ingot of unrefined metal is lowered into the vessel into contact with the molten electroslag layer. A refining current is passed through the slag layer to the ingot to cause surface melting at the interface between the ingot and the electroslag layer. As the ingot is surface melted at its point of contact with the slag, droplets of the unrefined metal are formed and these droplets pass down through the slag and are collected in a body of molten refined metal beneath the slag. The refined metal is held within a cold hearth. At the bottom of the cold hearth, a cold finger orifice is provided to permit the withdrawal of refined metal from the cold hearth apparatus. The refined metal passes from the cold finger orifice as a stream and is processed into a sound metal structure having desired grain structure.

Abstract: The invention is directed to a method and a mold for forming a zinc collar on an insulator metal cap. The zinc collar forming mold is composed of a setting section for setting the metal cap in position on the mold and an upwardly opening cavity defined around the periphery of the setting section. For molding a zinc collar, the metal cap is immersed in a molten zinc, and the metal cap is set upright on the setting section of the mold with the lower half thereof being still in the molten state. Subsequenctly, a molten zinc is poured from the upper opening of the mold, and upon solidification of the molten zinc, a zinc collar can be formed around the external circumference of the metal cap.

Abstract: A hinge connection for joining a heavy carrying wood member such as a glulam and a carried wood member having different depth dimensions including a metal hinge connector having side members disposed on opposite sides of the carrying and carried wood members joined at a lower portion by a seat member and at upper portions by a top flange member. The hinge connection is particularly suited for structures subject to earthquakes, hurricanes and other cataclysmic events which subject the structure to uplift and lateral forces in addition to the specified gravity load design forces.

Abstract: In a dental prosthetic casting-on process, in which a secondary part made of metal is cast-on to a primary part made of metal, a primary part made from an oxide-forming metal alloy may be used if the latter's casting-on surface is alloyed, prior to casting-on, with a reducing metalloid. In this regard, boron, silicon or phosphorus, for example, can be made to diffuse into the surface lattice of the primary part. A primary part made from an oxide-forming dental alloy and suitable for such a casting-on process exhibits in its casting-on surface an enhanced boron or silicon or phosphorus content.

Abstract: A method of producing amorphous alloy thin strip suitable for use in commercial frequency band transformers utilizes a high-quality molten steel suitable for electromagnetic silicon steel plates but containing insufficient silicon and boron. The molten steel is divided when tapped out of a converter or after a vacuum degasifying steel making process, and silicon and boron are added with heating to create the desired composition. The molten steel is formed into thin amorphous alloy strip by quenching.

Abstract: A method for pressure infiltration casting is provided wherein steps of preheating and evacuating a mold cavity and infiltrant charge are carried out in a separate vessel from a pressure vessel wherein the mold cavity is filled using a vent tube, allowing for rapid finished article throughput.

Abstract: A method for manufacturing an engine block by sand mold casting techniques wherein the cylinder bore liners are recessed from the cylinder head contact surface of the engine block is provided. The outer surface of each cylinder bore liner has at least one circumferential groove formed therein. The cylinder liners are initially positioned in a barrel core box and a barrel slab core is formed by blowing resin coated sand into the core cavity of the barrel core box. Each liner is positioned in the barrel core box such that the groove remains free of sand during the core making process. The barrel slab core is then combined with other conventional core assemblies to form a cylinder block mold. The cylinder block mold is filled with a light alloy metal to produce an engine block casting with caste-in-place cylinder bore liners. The top end of the cylinder bore liners may be cast above or flush with the cylinder head contact surface of the engine block casting.

Abstract: A casting mold has a main body provided with a vent hole opened up in a casting space of said main body. The improvement is characterized in that the vent hole is provided with air discharging means and air feeding means which are disposed at the vent hole and the air discharging means and air feeding means are suitably selected so that air within the casting space can be discharged and a pressurized air can be fed toward the casting space through the vent hole.