Abstract: A continuous casting process and slab plate mold for casting an endless solidified steel shell enclosing a liquid core which is formed of spaced parallel longitudinal wall plates having held therebetween spaced inwardly tapered transverse wall plates provided with specially contoured inner surfaces comprising flat sections extending inwardly from each longitudinal edge disposed perpendicular to the longitudinal wall plates and having a length about equal to the thickness of the wide walls of the casting shell at the lower end of the mold with the inner ends of said flat sections being connected by a convex section whose curvature is such that the convex section is maintained in supporting contact with said casting as the casting is moved downwardly through said mold; whereby the pressure of the casting shell on the transverse wall plates is evenly distributed so that uneven wear is avoided and the working life of the transverse wall plate substantially extended.

Abstract: A concrete forming system includes a plurality of forms each comprising a planar upper wall having curved shoulders extending along each edge thereof and side walls comprising upper outwardly tapered portions which facilitate withdrawal of the forms following a concrete forming operation and lower portions extending perpendicularly to the upper wall. The lower portion of each side wall has longitudinally spaced sets of holes formed therethrough with each set comprising a plurality of vertically spaced holes. The forms have open ends, with one end of the form having an outwardly extending lip for receiving the opposite end of an adjacent form to position the exterior surfaces of the form in alignment across the joint therebetween. End caps are provided for receiving the upper walls and the side walls of the forms to close the otherwise open end.

Abstract: A method of connecting a pipe to a pressure conveying element, especially a pipe plate, a pressure container, and a collector, according to which the pressure conveying element is within the region of its intended connection with the pipe provided with lips. After the pipe provided on its inside and outside with a lip has been introduced into the pressure conveying element, the pipe is at its outer lip connected to the lip of the element by a complete through weld. Subsequently a centering bushing is introduced into the pipe and is clamped therein so that the outer surface of the centering bushing together with the inner surface of a bore in the conveying element--which bore is substantially coaxially arranged with regard to the pipe--forms a flat annular trough, whereupon the space between the outside surface of the centering bushing and the inner surface of the trough is filled with welding material.

Abstract: A hood for location above the upper surface of an electroslag mould comprises an upwardly extending tubular portion which defines an elongate opening through which a consumable electrode can be lowered into the mould. Dry air is conveyed to the interior of the upper section of the mould from a refrigerator, the air passing out from the mould through the annulus defined between the hood and the electrode.

Abstract: The installation comprises a liquid container and an electrode holder located above said container and mounted with a provision for moving the electrode to the preset position relative to the casting. The container shell is made of two telescopically jointed parts with a pneumatic seal on the joint. Secured rigidly at the level of the upper face of the lower part of the shell is a casting support. A special mechanism delivers the casting onto the support and removes it therefrom. The casting is placed on the support with the upper part of the shell lowered which allows the positioning of the electrodes above the casting to be controlled visually. Then the movable part of the shell is raised, filled with water so as to cover the casting completely, and the cores are knocked out.

Abstract: This invention sets forth an improved method of continuously casting a metal filament or fiber from molten liquid metal. The filament is formed by forcing the molten metal from a melt pot through an orifice and solidifying the molten metal jet into a filament while it is moving in a cooling atmosphere. As the solid filament moves with respect to the gas atmosphere, the gas by friction with the surface of the filament will exert a force on the filament, either acceleration or deceleration depending on whether the gas is flowing with a velocity greater or less than the filament velocity. The invention sets forth parameters defining the relations that must exist between the filament velocity and cooling gas velocity which give rise to acceleration and deceleration forces and whose magnitudes determine the formation of continuous filament or fibers.

Abstract: A method of casting quiet steel in a mold according to which prior to the casting of casting powder with a bulk weight of from 250 to 705 gr/liter and in a quantity of from 1 to 3 kg/ton of steel is introduced into the mold at a distance of from 5 to 50 cm from the base of the mold, and in which when the liquid steel level reaches the desired height the slag layer is instantaneously and completely covered with water whereby the entire slag layer solidifies and lifts itself off the steel level so that the latter is contacted by the water.

Abstract: A piston molding machine comprising a base on which a pair of mold supports are mounted for movement in a straight line toward and away from one another. A mold half is mounted on each support, and when the mold halves are juxtaposed they provide a cavity for forming a piston. A mold cap is pivoted to each mold half about a transverse axis rearwardly of the face of the mold half. A piston motor extends between each cap and its respective mold support for pivoting the mold cap into position adjacent the mold half to define the top of the cavity and away from the mold half to provide clearance for removal of a piston formed in the mold.

Abstract: To cover at least one face of an extruded, hollow, plastic body, the front face of the extruder die is formed with a recess in which a cylindrical roller is rotatably mounted contiguously adjacent the die orifice. The roller defines a first portion of a feed channel for a foil with the die wall in the recess and a second channel portion, tangential to the first, with the mandrel which defines an extrusion gap in the die orifice. The foil may be draped about side faces of the mandrel by pressure rollers if the extrudate is backed by mandrel portions extending to the pressure rollers.

Abstract: Ingot mold for continuous rotary casting has an inner sleeve, the inner surface of which contacts the casting and rotates therewith and a stationary outer jacket, in which said sleeve is rotatably mounted. A pair of concentric annular ducts for cooling fluid are formed in the sleeve concentrically with respect to the cooling surface and are connected at their upper ends. Bearing means are provided between the sleeve and jacket, and labyrinthine seals are located above and below the bearing means. The cooling fluid enters the outermost duct and leaves the innermost duct below the bearing so that there is no possibility that water will enter the bearing.SUMMARY OF THE INVENTIONThis invention relates to an ingot mold for the continuous rotary casting of ingots and especially for the preferably oscillatory vertical rotary casting of steel ingots.Applicant has already described in French Pat. No. 70.47337 filed Dec.

Abstract: A simple and economical method of forming a foundry mould for precision investment casting wherein the time period for allowing each applied refractory coating and stucco coating to set on a meltable mould former is substantially reduced by applying alternate coatings of immiscible, refractory particle binders to the mould former interspersed with stucco coatings, with at least one of the refractory particle binder coatings being in the form of a slurry containing refractory particles. This eliminates the necessity of having to allow one coating to set before the next one is applied. The alternate refractory particle binders used are a partially hydrolized, organo-silicon compound and an alcohol tolerant non-alkaline aqueous colloidal silica.

Abstract: In injection apparatus of the type wherein molten metal is injected into the metal mold of a die casting machine by an injection plunger and the fluid pressure acting upon the injection pressure is increased by a booster piston at or near the end of the forward stroke of the injection piston by means of a booster cylinder, a limit switch is mounted along the path of the forward stroke of the injection piston to be operated thereby as so to operate the booster piston at any desired point of the forward stroke.

Abstract: A method of forming investment casting shell moulds by alternately dip coating a mould former in slurries of refractory particles and stucco coating the former, wherein the slurries contain a binder and a thixotropic modifier to reduce or eliminate the drying period between dip coats. The initial slurry has a suspended solids content in the range 30% to 50% by volume of the total volume of the slurry to provide an initial coating on the former which will not be penetrated by the relatively coarser stucco particles, while the other slurries have a suspended solids content in the range 20 to 40% by volume of the total volume of the slurry to coat the previously applied stucco coating. The thixotropic modifier is at least one substance selected from aluminum alkoxides, aluminum aryloxides, clays, carbon blacks, fumed silicas, fumed alumina, fumed titanium oxide, fumed zirconium oxide, fumed hafnium oxide and fumed chromium oxide.

Abstract: A strand guiding means for a continuous casting plant with sets of supporting rollers and also driving rollers. At least one driving roller being arranged at the beginning and/or at the end of a set of supporting rollers. The driving rollers are mounted on cross beams, which are in turn connected to one of two supporting roller carrying members, preferably by means of a linkage parallelogram. In addition the driving rollers are displaceable perpendicularly to the strand surface.

Abstract: The capacitance and diameter-over-dielectric of successive sections of a conductor having a layer of cellular plastic insulation extruded thereon are monitored continuously. The monitoring provides a continuous indication of the capacitance and the diameter with respect to the percent expansion of the cellular plastic insulation and the weight of the insulation per unit length of the conductor. This facilitates the regulation of process variables to maintain the capacitance and diameter-over-dielectric within acceptable ranges of values.

Abstract: A process for hot topping by electro-slag-remelting in which before or before and during hot-topping a portion of the liquid remelting slag in the mold is removed in order to achieve a hot topping of the ingot under a reduced amount of slag.

Abstract: Apparatus for producing a continuous flexible reinforced tubular conduit is provided and utilizes a plurality of elongated rigid mandrels each having a non-yielding outside surface and such mandrels are moved continuously through a fabrication area while operatively associated in aligned end-to-end relation where at least one wire is formed around the mandrels in a continuous non-rotating helical coil. An extruder head is provided and extrudes a plastic tube around the coil which is urged and bonded thereagainst to define a conduit whereupon the conduit is subsequently separated from its associated mandrel.

Abstract: The present invention relates to a rotary magnetic field type stirrer for a continuous metal casting machine which has characteristics as mentioned below.

Abstract: A method for continuously manufacturing an endless lead sheet from which a cathode starting sheet to be used in electrolytic refining of lead is prepared are disclosed. In the present method, molten lead is continuously introduced into a first separation zone where dross is caused to come up to the surface and separated from the molten lead, mixture of the dross and the molten lead in the vicinity of the melt surface is introduced into a second separation zone through a wide flow path, and the molten lead substantially free from the dross is introduced into a casting zone while the dross is accumulated on the liquid surface in the second separation zone. In the present apparatus, there is provided in a casting tank a dish surrounding a bottom of a rotary cooling drum, which dish includes a laterally extending, shallow cutout at an upper end thereof. An adjustable gate device is provided between the cutout and the bottom of the drum.

Abstract: A mold for casting contact lenses from an unpolymerized resin such as silicone gum wherein the resin is polymerized by high energy radiation such as an electron beam. One part of the mold is a cap capable of transmitting such radiation. The male section of the mold is gold plated to minimize reaction between the resin and the male section under the influence of the electron beam.