Abstract: A method for preparing formed metallic structures involves admixing finely ground metals with a reactive phosphor or iron containing binder and subjecting the resultant mixture to compression.
Abstract: The invention comprises the process for making an inorganic refractory insulation article by forming a fiber mat from a fiber slurry, impregnating the mat with a conditioned colloidal silica composition comprising colloidal silica, acid, aluminum chlorhydrate and water and drying the mat to form the article. The invention further comprises an inorganic refractory insulation article comprising randomly oriented refractory fibers retained by dried colloidal silica uniformly distributed throughout the article and from about 0.001 to about 1.5 weight percent of aluminum chlorhydrate which article is manufactured in accordance with the process.
Abstract: A new method of preparing a fire-resistant sheet formed product is disclosed involving the following steps: (1) grinding together a particulate inorganic material selected from the group consisting of crystallized blistered glass, crushed cement clinkers and crushed blast furnace slags, a hydraulic binder and from 10 to 2% by weight of an organic thermosetting binder in a ball mill until the particulate inorganic material has sufficiently disintegrated and the particulate inorganic material, the hydraulic binder, and the organic thermosetting binder are homogeneously distributed to form a dry mixture of particles; (2) subjecting the dry mixture of particles to heat treatment, under pressure, to consolidate and bond the dry particles into a unitary structure to form a sheet; and (3) after release of pressure, treating the sheet with water to set and cure the hydraulic binder.
Abstract: A web is formed from particulate material, for example, wood fibers, by depositing the fibers on a conveyor surface in a distribution chamber. The particulate material is introduced into the distribution chamber at its top by a carrier air stream which is caused to oscillate across the surface by impulses from separate control blow boxes on the opposite sides of the stream. The particulate material is thoroughly dispersed in the air stream by passage through a transition zone where the carrier air stream is deflected into a zigzag path and its flow velocity is reduced. The effect of static electricity on the particles in the carrier stream is reduced by lining the transition zone with nonconductive material and providing ionizing devices in the blow boxes for the air flow passing through the control boxes, or in the chamber adjacent the boxes.
Abstract: A process for molding a coherent, pliable, thermally bonded, non-woven fabric comprising potentially adhesive fibers wherein the fabric is molded and new or stronger thermal bonds are developed within the fabric by the application of heat, whereby the cooled fabric retains its molded shape.
Abstract: Anhydrous alumina powder, preferably powdered alpha-alumina, is formed into a high solids slurry in water containing one or more soluble compounds that yield Na.sub.2 O when heated in air, preferably a mixture of sodium carbonate and sodium nitrate, and optionally containing one or more soluble compounds that will yield lithium oxide, magnesium oxide or mixtures thereof, when heated in air. The slurry is rapidly dried, preferably by spraying in air, to precipitate the metal oxide precursor(s) and form an intimate substantially homogeneous mixture with the anhydrous alumina particles. This precursor powder is pressed into a shaped article, and heated to decompose the source(s) of metal oxide, react the components to form the desired beta-alumina phase, and sinter the article to produce the dense polycrystalline beta-alumina.
Abstract: An aqueous slurry of calcium silicate hydrate which is formed by heating a siliceous source and a calcareous source in water to react them and which has the specific property is shaped with a press filter molding and cured by a steam curing under steam pressure to cause a transformation of the calcium silicate hydrate whereby a calcium silicate shaped product having low bulk density and high mechanical strength is obtained. The calcium silicate shaped product is suitable as a lagging product or a heat insulator.
Abstract: A method is provided for embossing material, such as plastic, in the form of a sheet under controlled conditions. In one form, embossing takes place while the plastic is confined and compressed between an endless sheet or belt and an extended area of the embossing surface of a drum. Pressure applied to the material being embossed or continuously cast against the drum may be such as to provide for the controlled solidification or setting of the material so as to reduce the shrinkage and warpage thereof and to control the dimensions of the sheet and its surface formations.In one form, a fluent material such as a molten polymer is forced under pressure between an embossing roll and the surface of a sheet compressed against peripheral or border surfaces of the roll. A dynamic seal is provided between the injector, the embossing or casting roll and the guide sheet. The seal may be partially effected by solidifying border portions of the sheet-like formation of material fed to the apparatus.
Abstract: A self-propelled slip form, closed at its top, front, and sides, but open at its rear and bottom, provides a pressure chamber having the cross-sectional shape of a wall or similar structure to be cast. Such slip form may be advanced continuously at a slow rate or in stages, but whichever it is, the advance is due solely to pressure exerted against the closed front of the slip form through the intermediacy of the deposited, unset concrete or the like. Such pressure can be utilized to pre-stress reinforcing material on a continuous basis as it is fed into the pressure chamber simultaneously with deposit of the concrete or the like.
Abstract: An atomizer for making powder of the type in which an atomizing chamber above a water bath container defines a path for a falling stream of molten metal and nozzles supply downwardly directed opposed ribbon sectioned jets of water at an angle to the vertical to impinge on the metal stream and atomize it. The atomized particles are then quenched by further water. According to this invention there are two pairs of opposed nozzles on lines mutually at right angles arranged so that the jets from the first pair intersect at a level above the level of intersection of the second pair. The jets from the first pair form the metal stream into a ribbon section in a plane containing the second pair of nozzles and the jets from the second pair atomize the stream.According to another feature the energy of the water flow of these jets is used to induce a circulating secondary flow of quench water in the atomizing zone thus eliminating the need for a purged supply of quench water.
Abstract: An apparatus for manufacturing sheathed heating elements, including means for supporting a plurality of sheaths to be filled with a particulate material, means for positioning a plurality of resistive elements individually within the sheaths, a plurality of sets of inner and outer concentric filling tubes defining an annular filler passage therebetween for the material, means for positioning the plurality of sets of concentric filling tubes within the sheaths in surrounding relationship to the resistance elements, means for feeding the material through the passage as the tubes are withdrawn from the sheath so as to concentrically position each resistance element within its respective sheath and to fill the sheath from the bottom thereof with the material, and valve means for controlling the feeding of the material through the passage.
Abstract: Process by which moulded articles are maufactured from clay. A continuously produced strand of the material in question is sprinkled with sand, whereafter at one location a piece is severed from the end of the strand at regular intervals, by a cutting apparatus, which piece then enters a mould. In the course of all phases of the process the strand and each severed piece thereof remain directed along one vertical downwardly directed line of movement.
Abstract: Polyvinylimidazoline flocculants are converted to an easily handled granular form by pelletizing with siliceous material and a lower alcohol, or mixture of lower alcohols with esters or ketones, and subsequently drying the pellets.
Abstract: A densified bonded layer is formed in a panel of fluffed wood pulp fibers having particulate hydrocolloid material distributed therein by passing the panel between first and second compression means to apply pressure to the panel, at least one of the compression means being heated. By suitably selecting the temperature and pressure applied to the panel, an integral, densified, compacted, porous, absorbent fibrous layer or region having relatively high cohesive strength, relatively good capillarity, relatively good shape and volume stability and relatively high fluid retentivity can be formed therein. Particles of the hydrocolloid material are fixed within the panel by being bonded to the fibers substantially throughout the panel, and by mechanical entrapment between fibers in the densified bonded layer.
Abstract: A machine for the continuous manufacture of a multilayer toxicogenic web material, such as asbestos. The machine includes a series of controlled feed units sequentially arranged above a continuous conveyor belt to serially deposit incremental layers of asbestos and oil products on the conveyor belt to form a thick, continuous sheet which is removed after proper curing, from the downstream end of the conveyor belt by a doctor blade. The machine is housed in an environmentally safe containment enclosure to prevent escape of potentially harmful material therefrom.
Abstract: A longitudinal oscillatory motion is imparted to a rotating shaft of a carbon black pelleter. The movement of the rotating shaft in longitudinal direction varies the paths of the outer ends of the pins radially mounted on the shaft and traveling near the inner wall of the pelleter chamber thus preventing a buildup of carbon black cake on said wall.
Abstract: Apparatus for the deposition of dry fibers on a gas permeable wire comprising a plurality of fiber distributors in separate housings, a tunnel connecting the discharge ends of said distributors, said tunnel having the top wall thereof perforated between said distributors, a gas permeable wire extending along said tunnel and including a pair of rollers positioned at opposite ends of said tunnel, means for driving said permeable wire along said tunnel, and means for producing a partial vacuum below said permeable wire and in said tunnel to distribute the fibers uniformly and to prevent their bunching between distributors.
Abstract: A method of making a ceramic shaped article from an inorganic raw material powder by extrusion molding is disclosed. The method comprises the steps of kneading an inorganic raw material powder with a plasticizer to obtain a kneaded body which is then molded by extrusion into a fluid having a high humidity to obtain a ceramic shaped article having no deformation and strain. The plasticizer is selected from the group consisting of mono-liquid type resin which is a water insoluble synthetic resin dissolved in a water soluble solvent and a hydraulic setting resin mainly consisting of polyurethane isocyanate prepolymer.