Abstract: Coiling method and device (“R”) for a long product (10). The device (“R”) comprises a mandrel (12) with a substantially cylindrical shape and rotating around its own axis, and a containing element (13) coaxial with the mandrel (12), rotating together therewith and defining a front wall (32) to contain the coil of product (10) to be formed. The containing element (13) comprises an annular channel (14) to clamp the leading end of the product (10) around the mandrel (12). The containing element (13) is mobile axially with respect to the mandrel (12) between a first position wherein the leading end of the product (10) is inserted, and a second position wherein the coil of product (10) is completed.

Abstract: A bar speed changing device (48) comprising a pair of upper rollers (55, 55?) and a pair of lower rollers (59, 59?). Said device receives a bar section with the rollers (55, 55?, 59, 59?) in the open position and rotating at a given speed. Upon leaving the device (48) said sections are fed into axially arranged peripheral seats (58) of rotating drum channels. Control devices calculate the speed at which the bar section must be released, upon completion of the braking action, according to the position that said section must occupy in one of said seats and on the basis of the bar-seat friction coefficient. When the rollers (55, 55?, 59, 59?) receive the bar, they turn at the calculated release speed. At a predefined moment, such to enable braking in the correct space and time, the four rollers close on the section and exert the braking action, exploiting the dynamic friction between the roller-section.

Abstract: A laying head, for forming coils starting from continuous rolled products such as round bars or wire rods (10) comprising a rotating member (3) with an axis (X), rotationally fixed to the supporting structure (30) by means of bearings (4, 5). The end of the rotating member (3) is a bell-shaped element (6) on the surface of which are a series of grooves (18) that guide the rolled product (10), said grooves having the form of a spiral and being open towards the outside. The laying head (1) comprises a fixed containing and protecting bell element (15) enclosing a portion of the rotating bell element (6) and having a shape that is complementary thereto.

Abstract: A laying head for forming coils using continuous and substantially rectilinear rolled products such as rods or wire, having vibration damping means integrated in one of two rotor supports (3), preferably the one on the rolled product outlet side. Said means comprise a plurality of coils (6, 6?, 6?) arranged around the rotor (3), rotating about its axis (X), which generate a magnetic field actively controlled by a computer, the resultant force of which is perpendicular to the axis (X) and of a predetermined intensity so as to eliminate the inertial forces generated by the mass imbalances. Alternatively, the damping means incorporated in one of the supports are comprised of oil film bearings.

Abstract: Oscillating table for blooms or billets production plants, comprising pairs of bars, lying on at least one horizontal plane, which constitute the elastic support elements of the crystalliser, thus permitting an optimal guidance of the oscillation thereof exclusively in the casting direction, said pairs of bars constituting a tie rod-strut system working in bending that confers to the table very high torsional and lateral stiffness. It allows a high precision in guiding crystalliser thus consenting it wide oscillations in the axial casting direction only.

Abstract: A device for reeling semi-finished rolled products comprises two sections (1, 2) connected together to form an articulated arm that guides the product (BL) coming out of a rolling mill onto the reel that is being wound. The second section (2), which is closer to the reel, during winding, maintains its own inclination constantly equal to the inclination of the turns of the reel. This enables a considerable reduction of the gap between the adjacent turns and prevention of any overlapping (i.e., climbing on top of one another) between the turns already wound and the turns being distributed on the same layer. Reels that are more compact and have a more precise geometry are thus obtained. Also described is a device (12) for guiding the rolled product (BL) arriving on the reel with greater precision.

Abstract: Crystalliser holding device for billets, blooms and slabs production plants that has a high constructive simplicity, a significantly reduced overall weight and that reduces substantially to zero the need for maintenance. The crystalliser holding device of the invention, in addition to efficaciously guaranteeing the transfer toward the exterior of the heat of the liquid steel introduced into the tubular crystalliser contained therein, also provides a separate circuit for cooling the continuous ingot exiting the crystalliser and the rollers at the foot. It also permits an easy and rapid replacement in the oscillating table in which it is housed.

Abstract: Plant for packing bars after the rolling cycle comprising a feeding unit, a shear (45) for cutting the bar to size, a pair of deflector devices (46), (47) and a bar braking device. The bar segment deflector devices send the bar segments into seats (58) arranged along the perimeters of pairs of rotating cylinders (50), (51), (52), (53) and parallel to the axis of the cylinder, after making them pass through a bar braking device (48) to slow the bars down to the predefined speeds. The bars are unloaded from the seats onto conveyors (60), (61), (62), (63) and transported to a station where they are packed into bundles.

Abstract: Support bearing for a roll (33) for immersion in liquid metal, comprising an internal rotating bush (31) fitted coaxially on a pin (32) at the end of the roll (33), and rotating inside an external bush (34) fixed to a supporting arm (37) of the roll (33). The first bush (31) is provided with an axial helical groove (39) on its outer surface and the second bush (34) is provided with a toroidal-shaped convex outer surface to allow rotation without friction inside the cylindrical ring of the supporting arm (37).

Abstract: Oscillating table in which the oscillation drive, comprising a hydraulic actuator, transmits the oscillating motion to the mould via a spring subject to bending stress, for example a fitted rod. The body of the hydraulic actuator is also anchored to the floor by means of a fitted spring subjected to bending stress. Thus thanks to the absence of any mechanical bearings in the drive mechanism, all disadvantageous movements caused as a result of bearing play, which increases at high oscillation frequencies, are eliminated. Moreover, the use of mould guide elements having a much simpler design and consisting of straightforward bars, also ensures greater guidance precision and enables a reduction in the oscillation marks on the cast product, a reduction that is even more noticeable when working at higher oscillation frequencies. Advantageously, the presence of an anti-roll device, consisting of two or more pairs of bars, for example two pairs, ensures good torsional rigidity of the table.

Abstract: Coiling device (“R”) and relative method for a windable long, metal product (10). The device (“R”) comprises a mandrel (12) having a substantially circular transverse section and rotating around a horizontal, vertical or inclined axis, and at least a guide and containing device (15, 16) which is driven between a first working position wherein it cooperates with the mandrel (12), and a second inactive position wherein it is arranged distant from the mandrel (12). The coiling device (“R”) also comprises at least a clamping device (21) associated with the mandrel (12), which clamps at least temporarily an initial segment of the metal product (10).

Abstract: Coiling device (10) and relative coiling method for rolled or drawn long products, comprising a mandrel (11), arranged cantilevered and rotatable with respect to a central longitudinal axis (X), and on which the long products are wound in adjacent and superimposed spirals (33), in order to form a compact coil (31) having the geometric shape of a circular ring with lateral flanks substantially orthogonal, or very angled, with respect to the central longitudinal axis (X). The mandrel (11) comprises a flange (12) substantially orthogonal, or very angled, with respect to the central longitudinal axis (X) which defines a first lateral flank of the coil (31). The mandrel (11) also comprises first arm elements (13) which define the cylindrical surface of the core that forms the coil (31), and second arm elements (14), opposite the flange (12), which define a second flank of the coil. The first and the second arm elements (13,14) are mobile between a first coil-forming position and a second coil-removal position.

Abstract: Coiling device (“R”) and relative method for a windable long, metal product (10). The device (“R”) comprises a mandrel (12) having a substantially circular transverse section and rotating around a horizontal, vertical or inclined axis, a containing element (13) to contain the metal product (10) arranged in correspondence with the mandrel (12) and substantially orthogonal to the axis, and at least a guide and containing device (15, 16) able to be driven between a first working position wherein it cooperates with the mandrel (12), and a second inactive position wherein it is arranged distant from the mandrel (12). The containing element (13) comprises an annular channel (14) made in proximity with an outer surface of the mandrel (12).

Abstract: Coiling method and device (“R”) for a long product (10). The device (“R”) comprises a mandrel (12) with a sub-stantially cylindrical shape and rotating around its own axis, and a containing element (13) coaxial with the mandrel (12), rotating together therewith and defining a front wall (32) to contain the coil of product (10) to be formed. The containing element (13) comprises an annular channel (14) to clamp the leading end of the product (10) around the mandrel (12). The containing element (13) is mobile axially with respect to the mandrel (12) between a first position wherein the leading end of the product (10) is inserted, and a second position wherein the coil of product (10) is completed.

Abstract: Compact plant for making steel bars and profiles with which, starting from the scrap, it is possible to obtain the finished product, for example bars with commercial length from 6 to 18 meters, pre-packed, packaged and ready for sale, with all the stations placed in line and operating continuously. All the stations are arranged in reduced spaces, thereby reducing both investment costs and plant management costs, and decreasing production times. Advantageously, the plant of the invention incorporates an extremely compact bar packaging apparatus which, through an innovative arrangement and innovative operating method of the components thereof, allows a further reduction in length.

Abstract: Control device for a stopper-rod to regulate the outflow of liquid metal through a calibrated hole of a pouring receptacle comprising motor means, suitable to operate lifting and lowering means (2) of the stopper (4) by means of first driving means (7) and second driving means (14, 14?), the latter being suitable to convert a rotating motion into a translational motion, wherein the second driving means are flexible longitudinal elements and are fixed at a first end thereof to lifting and lowering means and a second end thereof to an anchor element (9), integral with the first means.

Abstract: An discharging device for molten metal between an upper ladle (1) and a tundish (3) comprising a slide valve nozzle fixed to the base of the ladle, comprising an upper fixed nozzle (42) and a mobile one below (43), inserted into an opening in the base of said slide valve nozzle with the lower end protruding from it, and a ring shaped blade (46) fixed to the base of the slide valve nozzle around said aperture. The tundish (3) comprises a cylindrical jacket (22) placed with a vertical axis and fitted at its end with a sand joint (24) for sealing gas into which the ring shaped blade is sunk (46). The slide valve nozzle can be fixed to the base of the ladle by mountings (48, 49) fitted with eyelets into which pivots (50) are inserted.

Abstract: A device for discharging molten metal from a container to another, comprising an outlet sleeve which penetrates into the lower container pushed by springs against a nozzle of refractory material which connects the inside of the upper container with the outside, so as to make a seal for the molten metal. The outlet sleeve is surrounded by a cylindrical sheath which joins, through a sand joint with a cylindrical blade fixed to the base of the upper container, around the aperture where it faces the nozzle. The sheath and the blade enclose a volume into which an inert gas is injected to remove the air possibly present.

Abstract: A bar speed changing device (48) comprising a pair of upper rollers (55, 55?) and a pair of lower rollers (59, 59?). Said device receives a bar section with the rollers (55, 55?, 59, 59?) in the open position and rotating at a given speed. Upon leaving the device (48) said sections are fed into axially arranged peripheral seats (58) of rotating drum channels. Control devices calculate the speed at which the bar section must be released, upon completion of the braking action, according to the position that said section must occupy in one of said seats and on the basis of the bar-seat friction coefficient. When the rollers (55, 55?, 59, 59?) receive the bar, they turn at the calculated release speed. At a predefined moment, such to enable braking in the correct space and time, the four rollers close on the section and exert the braking action, exploiting the dynamic friction between the roller-section.

Abstract: A drop feeder (1) for feeding molten metal into an ingot mould (15) comprises a distributor (3) having a substantially prismatic shape, with one of the faces open, in which the inside of the distributor comprises three tanks (4, 5, 6), separated by walls (7, 8) functioning as weir for the molten melt poured into the intermediate tank (5). There are provided slots (10) arranged on the faces of the distributor (3) for emptying of the molten metal from the distributor into the ingot mould or into a second distributor.