Abstract: A flexible form is presented. The flexible form may be shaped to produce the desired contour of concrete or other plastic material in the construction of various structures and is held in place by a plurality of positioning brackets. The flexible form is made of two or more parts, an outer part which provides durability and wear resistance and an inner part which provides the desired flexibility and is protected by the outer part. The parts are assembled in such a manner that each flexes independently of the other parts.

Abstract: Concrete forms utilizing a concrete form liner including a two-sided fabric having a different range of pore sizes on one side compared to the opposite side. In one embodiment, a microporous coating, such as an ethylene-vinyl chloride microfoam dispersion, is placed on one side of a porous fabric to controllably reduce the pore size of the fabric on that side to between 0.2 to 20 microns. The coated fabric is used in combination with a support and a grid to form a concrete casting system wherein the coated side of the fabric is placed directly in contact with the concrete. The microporous coating stabilizes the surface fibers of the fabric thereby reducing the tendency of the fibers to stick to the concrete. The pore size of the coated side of the fabric must be small enough to substantially keep all concrete particles from passing through the fabric, but sufficiently open to permit the passage of water and air.

Abstract: A form device for cellular concrete, including a number of piled-up form units having a heat-insulating bottom and shell, a heat-insulating top board, and a bottom-to-shell joint. A cellular concrete manufacture is produced by mixing cement with warm water at a temperature of 40.degree. to 75.degree. C. to form a warm cement mortar, mixing the mortar with a bubbled warm frother solution to form a warm cellular concrete paste, and hardening the paste using such heat-insulating form device.

Abstract: Polymeric molds and polymeric mold inserts which have been modified by a plasma treatment process. These modified molds and mold inserts may be used to manufacture improved molded cosmetic products such as lipsticks, giving these products a uniform high-gloss finish.

Abstract: A formwork for a draft tube which includes ganged precast forms, each precast form corresponding to a curved segment of the draft tube. The precast forms are molded with continuous side plates extending thereabout and anchored in the precast concrete form and projecting beyond the surface opposite to the contact surface to provide a flange. A fastening means for attaching adjacent forms with a space therebetween to allow for stripping. A method includes determining the outline of the inner surface of the draft tube and dividing it into segments and preparing molds to make precast forms corresponding to each segment. The precast forms are assembled and shored to provide the draft tube ganged formwork, and concrete is poured about the draft tube formwork and is cured. The precast forms are stripped from the set concrete structure and reused in another draft tube formwork.

Abstract: A concrete construction form including a plurality of assembled sections each having a first smooth coffering surface and a rear surface reinforced by stiffening fins oriented perpendicularly to the rear surface with elongated reinforcement gutters extending along each stiffening fin and wherein transverse girders are connected to the fins by fasteners extending through the girders and into the open ends of the gutters.

Abstract: A form for walls and the like of the type formed by two parallel, facing molding surfaces each of the surfaces being formed by a plurality of panels, each panel having a rigid frame formed with an inner flange at one side and spaced holes, a plate with a major side attached to the inner flange of the frame, cellular reinforcing body made of plural wavy metallic strips in stacking condition and sandwiched between two wire nets, the reinforceing body is attached to the major side of the plate within the frame, and spacing units for simultaneously locking two layers of adjacent panels in opposed arrangement to provide great rigidity in the assembled form.

Abstract: Ceramic coated metal mold having a constant ceramic film thickness, which is superior in adhesion resistance and abrasion resistance, prepared by coating the inside and outside walls of a metal mold with ceramics, by the physical vapor deposition method. The ceramic coating is selected from one of TiC, TiN, and TiCN. The mold surfaces to which the coating is applied has a surface roughness of 1 S or less and the end corners have a radius R of 0.1-0.3 mm, to provide adhesion between the metal mold and the ceramic coating.

Abstract: A mold structure including layers with different physical properties is used to provide hot surface during molding. The use of a thin layer of low thermal conductivity covered by a smooth skin layer prevents quick cooling of the surface of the pre-heated plastic to be molded. The plastic surface remains molten and flows to fill the mold during press closing, resulting in smooth surfaces even when fiber reinforced plastics are used.

Abstract: The mold body consists of a mechanically workable, porous material. This allows to provide complicated shapes without suffering a loss of quality of the deep drawn foil. Due to the mechanical working it is also possible to provide different exchangeable inserts (15, 16 and 17) with individual shape determining mold face surfaces.

Abstract: A method of manufacturing a thick-walled container casting of a cast iron with a spheroidal graphite comprises forming an inflexible mold spaced between an inner cylindrical dead mold core and an outer mold arranged over the dead mold core, filling the mold space through a gate from an end thereof while cooling particularly the inner mold surface of the mold ajacent the dead mold over the amount of a cooling of a usual sand casting, and dimensioning the gate so that the cast iron solidifies in the gate before the eutectic solidification of the casting sets in. The device comprises an inner cylindrical dead bolt core which has a bottom end and a closed top end and an outer cylindrical mold positioned over the inner core with its top spaced from the top end of the inner dead mold core. The bottom open ends of the inner and outer cylindrical molds are closed by means which define a mold filling closure having a gate dimensioned so that the filling of the mold will effect first the solidification in the gates.

Abstract: An assembly for the preparation of ceramic composite structures includes a segmented container within which a permeable filler is retained and a parent metal body is contacted with the bed of permeable filler. The segmented container is comprised of one or more segments made of a material, such as an inconnel alloy, which has a coefficient of thermal expansion which is significantly greater than that of the filler. The segments are arranged to defined between or among them one or more expansion joints which are effective to accommodate circumferential thermal expansion of the segments to thereby inhibit or prevent volumetric expansion of the container. A method of forming ceramic composite structures includes heating the resulting assembly in the presence of an oxidant to melt and oxidize the parent metal, e.g., aluminum, to form a polycrystalline material comprising an oxidation reaction product which grows through the mass of filler to embed it and thus form the composite structure.

Abstract: Molds for making metallic nuclear fuel rods are provided which present reduced risks to the environment by reducing radioactive waste. In one embodiment, the mold is consumable with the fuel rod, and in another embodiment, part of the mold can be re-used. Several molds can be arranged together in a cascaded manner, if desired, or several long cavities can be integrated in a monolithic multiple cavity re-usable mold.

Abstract: A multilayer mold for use in blow molding parts within short cycle times is provided. The multilayer mold has a hard skin layer, an insulating layer and a base containing cooling means. The transient temperature increase of the skin layer of the mold as a hot parison contacts the mold is used to produce smooth surfaces on parts since the skin layer remains hot during parison inflation.

Abstract: An apparatus for forming a pellet is disclosed that includes at least one punch that is reciprocably movable through an opening in a die for compressing a granular material, such as uranium dioxide, into a pellet such as the fuel pellets used in the fuel assemblies that generate power in nuclear reactors. The punch is advantageously formed from an alloy consisting essentially of tungsten carbide having a grain size of less than one micron which is embedded in a matrix of cobalt which constitutes between 16.5 and 17.5% by weight of the alloy. The alloy is preferably hot isostatically pressed to achieve zero porosity and a density of approximately 14.0 gm/cc.sup.3. Additionally, essentially pure ingredients are preferably used to avoid interfaces in the resulting alloy which could provide situs for chipping. The resulting alloy has a Rockwell scale A hardness of 89.

Abstract: The combination of a mold body for molded plastics or the like with a materials alloy core pin which at one and the same time establishes an aperture in the molded material and substantially reduces the mold cooling time by being formed from an alloy which rapidly dissipates heat that includes copper, nickel, silicon and chromium. The percentages of each material in the alloy can vary in a range but there is a preferred percentage to total materials for rapid cooling purposes.

Abstract: The moulding tool has an annular die providing a moulding cavity, an inner ring abutting against the die outer peripheral surface and an outer ring abutting against the inner ring outer peripheral surface. The inner ring is made of a material having a higher modulus of elasticity than the material from which the outer ring and die are made. Advantageously the inner ring is made of a carbide metal and the die and outer ring of steel and in the above described relationship to reduce the danger of fracture of the die.

Abstract: This invention is directed to a thermal barrier layer particularly adapted for insulating a solid flowable particulate polymeric pressure transfer medium from elevated temperatures during high temperature molding. A method useful with the thermal barrier comprises transferring pressure from a pressure means via the thermal insulation layer to an article and exposing the article to temperatures of about 316.degree. C. to about 1371.degree. C. An exemplary thermal barrier comprises at least two flexible layers of beads having a thermal insulation of less than about 2 k.

Abstract: A method for rotational molding a thermoplastic article using a mold made of a fiber reinforced thermoset resin which has a heat distortion point above the melting point of the thermoplastic material. Metal or other materials may be used to provide different coefficients of heat transfer at preselected portions of the mold. The entire mold may include a thermal coefficient modifier to increase the heat transfer rate of the mold uniformly over the entire mold in addition to the preselected portions.

Abstract: A method of forming a coating useful for forming casting molds including agitating a quantity of polyester resin and admixing into the resin a quantity of aluminum powder, storing the mixture for 12 to 24 hours, introducing a catalyst into the mixture and spraying the mixture onto an object defining a mold cavity of a casting mold. The atomized aluminum powder should have a weight ratio of 10 to 50 percent of the resin and should have a ration of 4 times 200 mesh/ 1 times 400 mesh+2 times 200 mesh/1 times 400 mesh.

Abstract: A plastics shaping mold comprising a layer of hardened resin material fixedly superposed on a metal mold and defining an uneven shaping surface for forming an uneven surface pattern on plastic articles. The plastics shaping mold is prepared by a method comprising the steps of superposing a resin material in a fluid state on a master in sheet form defining an uneven surface inverse to the uneven shaping surface to be formed, allowing the resin material to harden and removing the master, thereby to form the layer of hardened resin material defining the uneven shaping surface.

Abstract: A sintering device includes separable mould walls which together define a mould cavity and a mould core which is positioned within the cavity to define an undercut mould surface. The core includes a hollow frusto-pyramidal central support formed with guideways and a plurality of core segments mounted for slidable movement within the guideways whereby the core is radially expandable and contractable. The segments include a plurality of arc-surface segments alternating with trapezoidal segments. The mould walls and the core include passages for introducing steam and air into the cavity. The passages of the core place the hollow interior of the central support in communication with the mould cavity.

Abstract: There is provided an ice tray and ice cubes formed therein in which the ice cubes contain embossments. The ice cube tray includes a base having a plurality of cavities. Each cavity has a bottom and a plurality of said walls and preferably the bottom has a surface in the cavity which surface has a protuberance. The ice tray also includes a cover secured to the base. Once a formed ice cube is removed from a cavity, the cavity can not be used to form a new ice cube.

Abstract: A mould set for injection moulding of plastics material comprises two one-piece components which together define the mould cavity and which are each produced by extrusion of high duty aluminum alloy so as to comprise, also, and integrally with each of them, all the necessary fixtures and fittings for the mould set. In addition, one of the mould components is provided with integrally extruded flanges enabling an ejector plate (also extruded from high duty aluminum alloy) to be supported without the need for complex fixtures. There is thus provided a mould set which performs the same functions as a conventional set even though the latter has three times as many components.

Abstract: A bronze alloy composition for glass making molds that has excellent corrosion resistance and resistance to pitting, the composition comprising copper, aluminum, nickel, iron, manganese, and a critical amount of silicon to provide the resistance to pitting.

Abstract: A method of producing cylindrical objects with one or more lobes in which the bore surfaces are completely protected by a surface layer of abrasion resistant and/or corrosion resistant alloy and which protective layer is free of any contamination by the metal of the substrate. A hard, wear resistant, and corrosion resistant nickel-based alloy is especially suitable as lining material for surface of cylindrical products, such as housings or shells used in extrusion and injection molding devices for processing halogenated resins or rubbers. The alloys will preferably also contain 0.5 to 5% silicon and 1 to 4% boron. Also disclosed is a method of producing cylindrical objects with one or more lobes in which the bore surfaces are completely protected by a surface layer of abrasion resistant and/or corrosion resistant alloy, such as the above-described metal-based alloy.

Abstract: Repair plates particularly adapted for mending various surfaces of a vehicle tire in which a plate body is formed from an epoxy casting resin material which is stable at curing temperatures of at least 220 deg. F., and has a face surface having the same configuration as the area of the surface of the tire to be mended, and a perforated aluminum plate imbedded in the rear surface of the plate body.

Abstract: A moulding pallet for moulding building blocks with interlocking surfaces comprises a metal sheet bent to form parallel ridges and valleys, with transverse sheet metal channels inserted through openings in the ridge sides forming transverse secondary ridges.

Abstract: Apparatus for producing an ice sculpture comprising a compressible gasket arranged between a pair of mold halves which are yieldably joined by spring-loaded releasable locking toggle assemblies and spring loaded hinge assemblies respectively arranged along opposite sides of the mold halves to permit the formation of large ice sculptures.

Abstract: A hollow core for a concrete block is cast from an abrasion resistant alloy steel known in the trade as #8620. The core is generally rectangular in cross section and includes a top wall and depending side walls. The side walls are ground to a mirror-finish and the fine tooling grooves formed when the side walls are ground are all parallel to each other and transverse to the top wall of the core. This greatly lessens the frictional resistance between the core and the cement greatly increasing the useful life of the core in comparison the cores previously constructed.

Abstract: An apparatus for manufacturing an embossed article of synthetic resin comprising heating a synthetic resin sheet to a softening temperature; overlaying the heated synthetic resin sheet on an embossing die made by an electro-chemical molding process and having an embossing surface with an embossing pattern thereon and a multitude of fine vacuum pores distributed uniformly over the entire embossing surface; and forcing the synthetic resin sheet against the embossing surface by applying suction through the fine vacuum pores to imprint the embossing pattern onto the synthetic resin sheet.

Abstract: An expandable enclosure is provided for freeze forming a processed mass of meat or poultry products into a desirable and naturally occurring cut of meat. This enclosure includes an elongate housing with an opening for receiving the mass, a displaceable cover which the product mass displaces as it expands during freezing, and fastening apparatus for providing resistance to the separation of the cover from the housing so that the cover can maintain pressure on the mass to expel voids and excess moisture from the mass and to press the mass into the shape of the enclosure.

Abstract: A material resistant to high temperature melts of metal and salt which comprises a composite material containing silicon nitride, silicon oxynitride, silicon dioxide and silicon prepared by(a) suspending silicon powder in SiO.sub.2 sol to form a pourable mass,(b) molding a workpiece from said mass,(c) hardening the molded workpiece, and(d) nitriding the hardened workpiece in a nitrogen atmosphere to form silicon nitride and silicon oxynitride to a degree that SiO.sub.2 and elemental silicon remain detectable in the nitrided workpiece,is useful as the material of construction for crucibles and tools for confining, handling and treating melts of metals or salts.

Abstract: This invention relates to a copper base alloy with improved toughness and weldability for use in making molds for glass containers. The alloy of the present invention contains copper, nickel and aluminum and may have intentional additions of iron for grain refinement and niobium for increased oxidation resistance. It is felt that niobium should be added when the alloy is to be welded under adverse conditions. The nickel content sould be between about 12 and 16 wt/o and the aluminum content between about 8.5 and 11.5 wt/o. If the aluminum content is above or below the range, and/or the nickel content is near or above 16 wt/o the alloy may have excessive hardness. Iron additions for grain refinement should be up to about 1.0 wt/o. The niobium, when added to improve weldability, should be maintained between about 0.5 and 1.0 wt/o.

Abstract: A mold for producing connecting straps for lead batteries, particularly according to a cast-on-strap (COS) process or the like, is especially adapted for the simultaneous casting-in of a pole insert, and has wall thicknesses which vary inversely to changes in the thickness of the connecting strap. Heat transition adjusted to the local accumulation of material on the casting is thus achieved, and the development of unequal temperature conditions during the entire casting process is avoided.

Abstract: A forming mold main body made of a first platelike member defining a forming mold surface of a predetermined shape and a second platelike member joined air-tightly at least at circumferential portions to the first member to define therebetween a jacket for heating or cooling medium. Plural spacers can be disposed between the two platelike members.

Abstract: A vacuum mold for vacuum-forming a plastic sheet heated to a high temperature to transfer grain patterns onto the surface of the plastic sheet, the mold comprising an electrocast shell formed, by an electroforming step, with a casting surface having the grain patterns thereon and a multitude of fine vacuum holes uniformly distributed at the casting surface. A back-up body is mounted at the rear surface of the electrocast shell and is provided with vent holes communicating with the vacuum holes in the shell.

Abstract: A improved mold, apparatus and method for injection molding is provided. The apparatus is of the type which includes a means for opening and closing a multi-part injection molding mold, means for supplying molten material under high pressure into the mold cavity when the mold is closed and means for removing articles molded in the cavity on cooling. The improvement is provided by a new multi-part mold which is made up of at least two parts. Each part of the mold comprises a mold block portion having a ceramic mold cavity insert. The ceramic mold cavity inserts define the walls of the mold cavity when the mold is closed. Each mold cavity insert comprises a shaped ceramic body having a mounting surface adapted to fit under compressive stress throughout the entire molding operation within a mounting cavity of the mold block portion.

Abstract: A metal mold for tire vulcanization comprising a tread pattern mold obtained by piling up and fixing a plurality of laminas in order; the laminas have molding portions corresponding to sectional shapes of a tread portion or an outer surface of a tire, the sectional shapes are obtained by slicing a tire in lamina-shape parallel to an equator plane of the tire.The metal mold of the present invention can be manufactured efficiently since the provision of working data and the working become easy. Furthermore, the mending of the metal mold resulting from partial defects and the partial change of the metal mold are easy since the metal mold of the present invention is not an integral but laminate construction.

Abstract: A novel coating (34) is provided on a member (24) which may be part of a mold (24). Plastic articles (10) which are made by injection molding within such a mold (24) can have a very smooth surface by replication of the surface coating (34). This allows the production of so-called rigid discs with a plastic core in place of the present day aluminum cores.

Abstract: High casting rates and consistently precise dimensions of lead and lead alloy projectiles are obtained with an ingot mold comprising two like ingot mold halves having abutting sides and upper and lower sides extending outwardly therefrom, the abutting mold half sides defining like cavity halves open towards the upper sides of the mold halves and forming a mold cavity for casting the projectile. Each mold half consists essentially of a first part of a metal having a high wettability for the lead or lead alloy being cast, the first metal parts of the mold halves defining the mold cavity, and a second part of a metal having a higher thermal conductivity than the first metal part, the second metal part being in heat conducting contact with the first part.

Abstract: Spherical hydrophilic contact lenses having a characteristic tricurve configuration designed to correct myopia (nearsightedness) are described. The center zone (A1) of the lens is substantially thinner than the periphery (A3) allowing enhanced oxygen transmission and comfortable, increased wearing times while the thicker mid-periphery (A2) imparts necessary integrity and handling characteristics for convenience in manual manipulation. Lenses are molded or cast directly in the desired tricurve configuration using specially designed replica molds made from metal master molds.

Abstract: A grooved baking pan and a method for baking therewith wherein the bottom surface of the pan is provided with a plurality of grooves. In the preferred embodiment, the grooves are V-shaped. The grooves are arranged in a pattern such as a grid pattern and apertures are located in the areas bounded by the intersecting grooves. The pan is used to bake high density food products such as pizza in an impingement oven wherein columns of heated air are formed which are directed at localized areas of the bottom surface of the pan. The pan is moved relative to the impinging air columns while the food product is being baked.

Abstract: Bosses project from the outer surface of the ingot mold and are arranged in a planar zone, each of the bosses contains a channel that has slidably positioned therein an anchor which is projected beyond the outer surface of each boss into each boss. The projecting portions of the anchors are attached to a continuous reinforcement band extending between the projecting portions of the anchors. The continuous reinforcement band is spaced from the ingot mold. Stresses and strains caused by teeming (pouring) hot molten metal into the ingot mold are absorbed by the continuous reinforcement band.

Abstract: A pastry mould, permitting even cooking and easy removal of the cooked contents of the mould, has a flat base with two upstanding tongues spaced apart and positioned opposite each other adjacent the periphery of the base, each such tongue carrying a pivot for two half portions of an enclosing rim, each half portion having its ends connected to a respective one of the tongues by the pivot thereon, such that the rim portions are each movable about the pivots into a position lying against the flat base, and into a position raised away from the base.

Abstract: The device comprises a fixed gassing box (1) a moulding box (2) and a head (2A) for receiving and discharging gas. The box (2) is provided with a massive block (7) of aluminium which forms a pattern-plate and has a multitude of orifices (8) extending therethrough. This block has a sufficient thermal inertia to form a frozen crust as soon as the moulding box (2) is filled with a pre-moistened sand or the like. This permits obtaining a high rate of production of frozen moulds or cores having a very good surface condition, a good stability of shape and high and homogeneous mechanical properties.

Abstract: A die casting metal hald mold comprising a front wall incorporating a die casting area, side walls extending rearwardly from the front wall, a backing member closing the base of said side walls, means to fasten the backing member to the bottom of said side walls, the front wall, side walls and backing member forming a high pressure heat exchange cavity, a valve for introducing fluid under pressure into said high pressure heat exchange cavity and a valve for releasing gas under pressure from said high pressure heat exchange cavity.

Abstract: The space between the open bottom mold and the supporting stool used for casting ingots is sealed by placing a thin wall steel tube between the mold and the stool. The weight of the mold partially collapses the tube causing the surfaces of the tube to conform to both the surfaces of the mold and the stool, thus forming a seal.

Abstract: A bifocal contact lens has a distant-vision portion of a diameter between 3 and 5 mm either located in the center of the lens or offset about 2 mm above the center. The anterior surface of the lens is cast in an injection molding machine from a working die which itself is made from a master-die composed of two pieces of steel, a plug portion being tightly fitted in an aperture in the carrier portion so that the boundary of the different prescription curvatures of the plug and carrier portion will meet as closely as possible. The plug portion is shrink-fit inside the carrier portion. No further finishing procedures are necessary after casting the bifocal lens in one piece from the working dies, and the working dies are so cheap to cast that they may be melted down after one or a few uses to make new working dies from the steel master-dies.

Abstract: A cast mold for plastic molding, made of a nodular graphite cast iron comprising spheroidal graphite particles. The mold includes a peripheral portion defining a molding surface which contacts a plastic material to be molded. At least the peripheral portion of the mold has a particle size distribution of spheroidal graphite in which not less than 90% of the graphite particles are not greater than 10 microns, and not less than 50% of the graphite particles are not greater than 6 microns. Preferably, the nodular graphite cast iron consists by weight of 2.5-3.8% of carbon, 2.0-3.0% of silicon, not more than 0.8% of manganese, 2.0-5.0% of nickel, 0.2-1.0% of molybdenum, and the balance being iron, spheroidizer and impurities.