Abstract: A method for direct casting of cast components by layer-wise generation of composite molds, wherein the composite molds are generated as monolithic elements and simultaneously with their respective cores in an assembled form. The system for layer-wise generation of three-dimensional models from the powdered material in a removable container with a movable bottom, which is separated from the device for lifting and lowering the movable bottom, which is built into the system for layer-wise generation of three-dimensional models. The generation of the molds is done by application of layers of powdered material and binding of the particles of each layer through a binder, added selectively according to a program/pattern only in the volumes, where the solid body of the model is being generated.

Abstract: The method and system for layer-wise generation of three-dimensional objects from powdered material includes sequential application of powdered material and suitable binder onto a vertically mobile worktop. Depositing is performed by a powdered material application device and a binder application device. The two application devices work in two mutually perpendicular directions along two horizontal planes parallel to each other and the worktop, performing the application in both directions of movement between their final positions. Application devices move and deposit the respective substance at a different optimal rate depending on the process. The method and the system have a wide range of applications in the casting industry for the layer-wise generation of complete sand molds and/or high precision cores directly from a three-dimensional computer model.

Abstract: A method for direct casting of cast components by layer-wise generation of composite molds, wherein the composite molds are generated as monolithic elements and simultaneously with their respective cores in an assembled form. The system for layer-wise generation of three-dimensional models from the powdered material in a removable container with a movable bottom, which is separated from the device for lifting and lowering the movable bottom, which is built into the system for layer-wise generation of three-dimensional models. The generation of the molds is done by application of layers of powdered material and binding of the particles of each layer through a binder, added selectively according to a program/pattern only in the volumes, where the solid body of the model is being generated.

Abstract: The method and system for layer-wise generation of three-dimensional objects from powdered material includes sequential application of powdered material and suitable binder onto a vertically mobile worktop. Depositing is performed by a powdered material application device and a binder application device. The two application devices work in two mutually perpendicular directions along two horizontal planes parallel to each other and the worktop, performing the application in both directions of movement between their final positions. Application devices move and deposit the respective substance at a different optimal rate depending on the process. The method and the system have a wide range of applications in the casting industry for the layer-wise generation of complete sand molds and/or high precision cores directly from a three-dimensional computer model.

Abstract: Additive manufacturing machine for creating a three-dimensional model from powder material, that consists of chassis (1), in which are located one below the other a loading system (4), system for applying powder material (2), system for applying fusing substance (3), container (5) with a removable bottom, fixating system (6) for the container (5), lifting system (7) for lifting and lowering the removable bottom of the container (5) and a control unit (9), which is located at the top end of the chassis (1). The system for applying powder material (2) and the system for applying fusing substance (3) are mounted on the chassis (1) in such a way as to be able to move on planes that are perpendicular to each other.

Abstract: Protection system for the mechanized covering of plant crops which are usually planted in rows, of the type in which vertical poles (1) are arranged along the rows and have heights greater than those of the crowns of the plants to be protected, the poles being interconnected by longitudinal (3) and transverse (2) cables to form an overhead supporting lattice roof structure, the system comprising means for mechanizing the steps of extending flexible protective sheets (4) over the roof structure and removing them therefrom, characterized in that: the poles (1) are in a staggered or grid arrangement such that they are transversely aligned in even-numbered rows (F2, F4, etc.) only and in odd-numbered rows (F1, F3, etc.

Abstract: An apparatus for packaging a product with an extensible film, including a conveyor for conveying a product to the apparatus, an evacuating device for evacuating a product from the apparatus at the end of packaging, an unwinding device to unwind the extensible film from a reel mounted on the apparatus, a tensioning device for tensioning the extensible film, the unwinding device including a first gripping element and a second gripping element that are movable independently of one another in an unwinding direction for unwinding the extensible film from the reel.

Abstract: A fluid end assembly of a high pressure reciprocating pump includes a housing defining an interior bore, a first opening at a first end of the interior bore, and a shoulder that divides the interior bore into a plunger bore and an outer bore. A plurality of overhangs is formed as part of the housing and extends into the outer bore, a plunger is positioned within the space and is operable to reciprocate along an axis within the plunger bore, and a valve cover is coupled to the housing and positioned to engage the shoulder to close the first opening. A valve cover retainer is positioned within the outer bore and includes a plurality of projections arranged to selectively engage the plurality of overhangs to sandwich the valve cover retainer between the valve cover and the housing to lock the valve cover into engagement with the shoulder.

Abstract: The waste compactor comprises a housing having an inclined wall in the upper part thereof. A motor on the upper wall drives a helical screw on the lower side of the inclined wall which converges conically downwardly with a decreasing pitch. A lower hopper extending downwardly from the inclined wall below the helical screw forms a funnel and is opened above to an inlet area. The inlet area receives waste material to be compacted, which material descends into the area of the helical screw. A lower more narrow end of the helical screw is located in a conduit which is slightly wider than the lower end of the helical screw and converges downwardly to a constriction at its lower end. Waste material is compacted by downward movement under the action of the helical screw and by being forced through the conduit. The lower hopper has drainage holes through which liquid can drain, by gravity, and a collector is positioned to collect the liquid passing through the drainage holes.

Abstract: Protection system for the mechanized covering of plant crops which are usually planted in rows, of the type in which vertical poles (1) are arranged along the rows and have heights greater than those of the crowns of the plants to be protected, the poles being interconnected by longitudinal (3) and transverse (2) cables to form an overhead supporting lattice roof structure, the system comprising means for mechanizing the steps of extending flexible protective sheets (4) over the roof structure and removing them therefrom, characterized in that: the poles (1) are in a staggered or grid arrangement such that they are transversely aligned in even-numbered rows (F2, F4, etc.) only and in odd-numbered rows (F1, F3, etc.

Abstract: The compactor comprises at least one robust transport screw, helix or spiral (16), which is inclined, of conical shape, downwardly converging, with a downwardly decreasing pitch, and is aligned axially with and fixed to the slow output shaft (117) of a reduction gear unit (17, 217, 317) located above and outside the inclined wall (301) of a loading hopper (1) which has an upper descending portion (101) with at least one hatch (2) for the introduction of the waste to be compacted and a discharge conduit (7) whose outlet opening is shut off by constriction means (8, 108, 208). The lower part (201) of the hopper (1) is shaped in the form of a funnel which is open outwards and is provided with drainage holes (9) and a base area (10) into which any liquid present in the waste tends to flow by gravity, means (13, 14, 114) being provided to collect the liquid and to guide it by gravity towards discharge means (20) a container (18).