Abstract: A cast piece guide roll segment in continuous casting equipment having a curved cast piece guide path which is used in the structure for supporting the roll groups in the respective curved portions for guiding the cast piece leaving the mold along the curve between the vertical and horizontal paths. In view of the problems inherent in continuous casting equipment such as the need for frequent roll changes and emergency shut-downs, the roll segment disclosed includes roll units having at least a pair of rolls and bearings provided at opposite ends thereof and removable from a frame, on which frame are mounted pivotable caps for holding roll units.

Abstract: Apparatus for manufacturing blanks from a synthetic plastics material inces a mould cavity defined between a mandrel and an outer mould. A retractable sleeve is slidably mounted on the mandrel and is displaceable within the cavity at a rate which depends on the rate at which the plastics material is injected into the cavity.

Abstract: Apparatus for injection molding parts which comprises forming mold cavities from a set of molds and injecting molding material into the cavities to mold a part on a pin extending up in each cavity; the molded parts are then ejected by being pushed up and off the pins when the molds are moved to expose the parts; ejection involves the application of a substantially uniform force over the base of the moulded part. The apparatus includes means for automatically degating moulded parts from waste material involving initial movement of one of the molds in the set relative to the others; automatic degating can be employed which can occur internally or externally of the molded parts; the molds employed with these specific ejecting and degating means, or with other ejecting and degating means, comprise an upper and lower portion of a universal mold base which forms an integral part of the molding apparatus and to these portions are detachably secured modular mold sections.

Abstract: A method of operating a continuous casting installation with high throughput wherein a metal, typically steel, is cast into a cooled continuous casting mold, withdrawing from the mold the cast strand possessing a liquid core and which is formed in such mold, guiding and cooling the withdrawn strand. At least in a partial zone between the mold and the complete solidification of the strand the strand surface is subjected to the action of a pressurized gaseous medium, primarily in the form of water vapor, the pressure of the gaseous medium essentially corresponding to the ferrostatic pressure prevailing in the strand, the water vapor being generated by spraying the strand surface with water, and deviations in the vapor pressure from the required vapor pressure are compensated.

Abstract: A rubber material is sequentially injected into a plurality of elongated molds positioned within a corresponding plurality of vertical hydraulic presses arranged in a row. The material is injected into each mold by a pair of injection molding machines which are arranged in side-by-side relation and are supported by a carriage for both axial and lateral movement as a unit. Each of the molds has a set of mold sections which are supported by upper and lower platens of the corresponding press, and each press includes a set of vertical tie rods which are spaced longitudinally along the mold and are actuated by hydraulic cylinders for rigidly clamping the platens and mold sections together. The tie rods have upper end portions which are releasably locked to the upper mold platen by a laterally movable latch mechanism. After a molding cycle, the latch mechanism is released, and the tie rods are retracted downwardly.

Abstract: A shuttle is mounted in a passage connecting ducts from injection barrels. An outlet in the passage wall connects to a common sprue channel. The shuttle isolates one duct from the opening at each end of its travel but at no time blocks the opening. The shuttle is preferably a ball and is preferably located in the spigot of a shut-off tap.

Abstract: A method and apparatus for preparing relatively large size foundry moulds and cores from cold-setting foundry sand mixtures wherein successive batches of sand and binder on the one hand with sand and catalyst on the other hand are mixed in a chamber having a rotary mixing element. The batches are discharged from the chamber by gravity into a mould or core box and the chamber is purged by a blast of compressed gas between the successive mixing operations.

Abstract: A mold assembly for use in a packaging machine for making a blistered package, which forms a plurality of blisters in a web of thermoplastic resin film forming a part of the blistered package. The mold assembly comprises a preforming structural body formed with a plurality of preforming molds and a finishing structural body formed with the corresponding number of finishing molds arranged in the same pattern as the preforming molds. The thermoplastic resin web is first subjected to a preforming process with the preforming structural body and then to a final forming process with the finishing structural body thereby to avoid excessive and quick reduction of the wall thickness which may otherwise be observable in any of the finally formed blisters. A method for this purpose is also disclosed.

Abstract: An apparatus for fabricating foam pads having a generally flat inner surface with a depending peripheral edge, the flat inner surface including a dense outer crust. A spring assembly is adapted to be disposed so that the terminal face portions thereof contact the outer crust and with the depending edge of the pad confiningly receiving the spring assembly to prevent lateral displacement therebetween. The apparatus includes an open top mold, and a mold insert which is adapted to be floatingly positioned on the upper surface of the foaming material to level the same while permitting the formation of a dense outer crust thereon. The depending foam edge may then be formed by adding additional foamable material along the periphery of the pad between the border of the mold and mold insert, or by suitably attaching a preformed foam strip therealong.

Abstract: A method of repairing large castings, such as ingot molds and mold stools, by employing an aluminothermic reduction reaction. The resultant repaired article has a metallurgically bonded plug in the crack, hole, break, or eroded surface. An alternative repair method of big-end-up ingot molds is disclosed which comprises forming a ceramic lining on the bottom of the mold.

Abstract: There is disclosed a magnetic printing base for one or more printing plates, a method of making the magnetic base, and a mold in which moldable, non-magnetic adhesive material is molded about various parts of the magnetic base. The base is structured to permit magnetic circuit devices and end plates to be interconnected by the non-magnetic material into a unitary arrangement. Each magnetic circuit device includes a flat magnet disposed between and in contact with a pair of flat magnetizable plates. The permanent magnetsextend short of the final desired dimension of the base. The plates and the molded material initially extend beyond the final desired dimension of the base, but are trimmed off by a cutter to the final desired dimension after assembly of the base.

Abstract: A process for the aluminothermic welding of rails in which the rail ends to be joined are surrounded by a prefabricated, dry refractory casting mold and sealed from the rails with plastic mold materials, such as, moistened sand; a reaction crucible is arranged above the casting mold and filled with an aluminothermic reaction mixture; the rail ends are preheated, for example, by burning a mixture of propane and oxygen and directing the flames downwardly into the riser-duct of the casting mold for a period of time up to about 2 minutes and at a temperature between about 300.degree. C and about 700.degree.C; the aluminothermic reaction mixture in the reaction crucible is ignited; and, upon completion of the reaction of the aluminothermic reaction mixture, the lower outlet of the reaction crucible is opened and the steel melt is poured into the mold.The amount of aluminothermically produced steel utilized is between about 0.15 and about 0.25 parts by weight based on the weight per meter of the rails to be welded.

Abstract: Handling equipment is provided to facilitate the placement, removal and repositioning of large form sections that are supported by a plurality of composite trusses. The trusses themselves are made up of chords, struts, couplers, connectors and brace components of standard sizes cooperatively interconnected to provide composite trusses that may be of various length and height. Deck panels and supports therefor are mounted on a plurality of trusses to provide a complete section of forms that is used and moved unitarily. The job site longitudinal movement of sectional forms of large size is aided through use of a plurality of tilting form glides while cross dollies provide unidirectional or multidirectional movement patterns for trusses which they support.

Abstract: A seal member is provided for use in concrete wall form construction which sealingly engages with a form bore through which a tie rod supporting the seal member and spacer cones passes so as to prevent leakage of wet concrete from the form. The seal member of resilient material is asymmetrically supported on the tie rod by means of a seal bore within a slit along the length of the seal member. The asymmetric placement causes the spacer cones to overlap and abut the inner surface of the form walls so that they serve as spreaders for location of the wall forms.

Abstract: Apparatus for manufacturing a brick having a roughened side surface including interconnected, upright, side plates defining a mold cavity having generally the shape of a brick to be formed. A bottom plate is shiftable vertically from a position against the lower edges of the side plates to form a bottom for the mold and a position spaced a distance therebelow. A power-operated pusher mounted above the side plates is shiftable downwardly into the region between the side plates for forcing a brick formed in the mold outwardly through the bottom of the mold when the bottom plate is lowered. One of the side plates has a lip projecting substantially normally outwardly therefrom into the path along which a side of a brick will be moved as it is forced from the mold. This lip scrapes a side of the brick to produce a roughened surface thereon.

Abstract: A spin pack assembly for the extrusion of synthetic filaments. Novel features are the polymer flow channels of the breaker plate and spinneret plate which comprise a capillary with open ends, the entrance ends of the breaker plate and spinneret plate and the exit end of the breaker plate defining, respectively, enlarged inlets and outlets, the walls of which intersect with adjacent walls to form a closed, interlocking network of ridges on the top surfaces of the breaker plate and spinneret plate and on the bottom surface of the breaker plate, so as to eliminate areas of low or zero velocity flow of polymer and to reduce pressure differences in polymer in the breaker plate-spinneret plate area.

Abstract: An apparatus for manufacturing a tubular film from thermoplastic resin which comprises an extruder fitted with an annular die; a mechanism for introducing air into a tubularly inflated film; a cylindrical water cooler which consists of an annular cooling water reservoir disposed at the upper part, a cap member covering said water cooling reservoir, a vacuum sizing chamber positioned below said cooling water reservoir, an annular cooling water discharging chamber located below said sizing chamber and an annular vacuum suction chamber bored with a suction port so as to remove residual water, the underside of said cap member and the upper side of said sizing chamber defining an annular passageway of cooling water; a mandrel received in the cylindrical water cooler so as to internally cool the tubular film; and a film take up mechanism.

Abstract: In the manufacture of cast articles such as gas turbine blades and vanes from high temperature alloys or eutectics, the heating of the mold in readiness for pouring and the cooling of the mold after pouring are precisely controlled by mechanism responsive to thermocouples internal and external to the mold and moving with the mold and a thermocouple in fixed relation within the furnace. The mechanism is especially adapted for use with the withdrawal technique in which the mold when poured is withdrawn from within the heating furnace past a radiation baffle thereby maintaining a steep thermal gradient within the mold and moving relative to the mold to establish the rate of upward movement of the solidification front within the alloy.

Abstract: Apparatus for feeding and distributing a steel melt into a continuous casting mould for slabs includes a pouring vessel with outlet apertures in its bottom wall. Immersion outlet elements depend from said vessel in registry with its outlet apertures, and extend down through the bath surface level in the mould and have lateral outlets. A pair of immersion outlets extend into said mould, and have an internal cross-section greater than the apertures in the pouring vessel, with their bottoms closed. Said immersion outlets each have a pair of lateral outlets of different cross-sectional area, on opposite sides thereof, longitudinally offset with respect to each other. One of the outlet apertures is larger in cross section than the other and is directed towards the center of the mould. Smaller outlet apertures are one-third to one-fifth of the cross-sectional area of the larger outlet apertures. Said outlet apertures are directed obliquely upward.

Abstract: Ingots of high-melting ferroalloys and metal alloys with good forming properties are obtained by melting a consumable electrode in a slag bath in an ingot mold while cooling the ingot mold and providing a high pressure gas inert to the slag above the slag bath. The apparatus is a trisectional pressure chamber including an ingot mold which may be surrounded by a pressure container, a bell-type distributing device surrounding and extending above the mold, a cap for the distributing device through which a guide rod for a consumable electrode is introduced into the mold and a gland mounted in the cap for sealing the pressure chamber.