Abstract:
A 3D printer 100 is described, which is configured to build up a three-dimensional component in layers by forming layers of particulate construction material lying one upon each other and by selectively solidifying a partial region of the respective construction material layer. The 3D printer 100 is configured to simultaneously build up one or more first three-dimensional components in a first construction space B1, which is arranged in the 3D printer, and one or more second three-dimensional components in a second construction space B2 which is arranged adjacent to the first construction space at a horizontal distance therefrom in the 3D printer.
Abstract:
An abrasive particle includes at most three surfaces and at least one edge which has a corner at least one end. The abrasive particle may contain a ceramic material, particularly polycrystalline α-Al2O3. Abrasive particles as a whole, methods for producing abrasive particles, moulds, abrasive articles, methods for producing abrasive articles, and methods for abrading a surface are also disclosed.
Abstract:
A method is provided for synthesizing beads using starting ceramic, metal, or mineral powders. Typical size of these round beads can range from about 0.1 mm to about 10 mm based on the processing variables. In the method, a slip is obtained which contains a metal, ceramic, and/or mineral powder dispersed in a solvent and an organic binder, such as a grain flour. Droplets of the slip are contacted with heated oil for a sufficient time to form beads. The beads are separated from the oil and dried to remove entrained water. The beads are fired at a temperature sufficient to produce beads possessing desired physical or chemical characteristics. The beads have useful biomedical applications as bone filler materials for bone fixation and bone growth. The beads may be coated with chemical catalyst agents and function as catalyst supports in chemical processes.
Abstract:
An elongated top and an elongated base each having mated roller components in the shape of mating inverted elongated surfaces which form a rolling bead roller chamber therebetween. The bead roller is injection molded of polycarbonate to be non-reactive with polymer clay, and it is transparent to enable the observation of the bead rolling process. Multiple roller components may be built into a base with mating multiple roller components built into a top with a handle or individual top roller components. A bead log roller with protruding measurement marks rolls clay logs with embossed measurement marks which may be cut to an appropriate size. An aligned series of notches transversely on parallel ridges of the bead roller tool allows a pin to skewer the beads through the exact axis of symmetry of the beads to form holes in the beads for stringing and to lift the beads to place them on a drying tray with similar notches along parallel ridges with troughs under the beads on the pin.
Abstract:
A method and apparatus for recovering concrete returned to the plant by delivery truck empties the delivery trucks into hoppers that dispense the so delivered left over concrete into molds designed to produce blocks of concrete suitable for regrinding into aggregate. The molded blocks are held in the molds for sufficient time to set the concrete for grinding before the blocks are separated from the molds. The molded blocks are then delivered to a grinding station where they are ground into aggregate of selected size for return to the concrete mixing operation. Any water that separates during the molding operation is subject to a settling operation to settle fine particles and the decanted water is then stored in a suitable reservoir for reuse, for example, in washing out the trucks.
Abstract:
A process is provided that permits the rapid quenching of molten ceramics by passing a flow of the molten ceramic into a turbulent fluid flow such that the flow is broken up into particles which then solidify as they pass into and through a cyclone and are finally separated from the fluid flow and collected as dry particulate ceramic materials.
Abstract:
Plastically formable material, which may be formed under pressure into desired shapes, is fed while in a fluid or plastically formable condition to a pair of cooperating surfaces which are relatively movable into compressive relationship with material disposed therebetween. The face of at least one of such surfaces is patterned with a plurality of juxtapositioned geometrical impressions of desired size and shape so as to form a ribbon or sheet of uniformly sized and shaped particles from the plastically formable material supplied to the cooperating surfaces. The uniform particles are initially joined together by thin web or edge portions which maintain the continuity of the newly formed particles within a sheet form. However, after the ribbon of newly formed particles has become sufficiently rigid, such as through the cooling of a molten thermoplastic material or the drying or firing of a green ceramic material from which such ribbon may be formed, the ribbon may then be flexed in various directions to separate the particles along the edge or web portions, thus providing a plurality of individual particles having substantially uniform size and shape.
Abstract:
An aggregate for making high-strength, light-weight concrete, the aggregate being constituted by shaped glass, asbestos, cement, metal or plastic elements whose surfaces are fluted and otherwise treated to improve the adhesion of the aggregate to the concrete matrix and which can be made hollow to effect a significant decrease in weight.