An immersion-nozzle replacement apparatus includes a guide, and a pressing keyboard row. The guide supports two immersion nozzles, a foremost immersion nozzle and a rear immersion nozzle. The guide includes two rows supporting the immersion nozzles via the lower face in the flange. The pressing keyboard row, which is provided in the rows of the guide, includes first keyboards pressing the foremost immersion nozzle via the lower face in the flange. The immersion-nozzle replacement apparatus pushes out the foremost immersion nozzle horizontally with the rear immersion nozzle, and puts the rear immersion nozzle on the pressing keyboard rows. The guide further includes an additionally-pressing keyboard row following a rear end of the pressing keyboard rows, and including a second keyboard pressing the rear immersion nozzle via the lower face in the flange before pushing out the foremost immersion nozzle.

An immersion-nozzle replacement apparatus includes a guide, and a pressing keyboard row. The guide supports two immersion nozzles, a foremost immersion nozzle and a rear immersion nozzle. The guide includes two rows supporting the immersion nozzles via the lower face in the flange. The pressing keyboard row, which is provided in the rows of the guide, includes first keyboards pressing the foremost immersion nozzle via the lower face in the flange. The immersion-nozzle replacement apparatus pushes out the foremost immersion nozzle horizontally with the rear immersion nozzle, and puts the rear immersion nozzle on the pressing keyboard rows. The guide further includes an additionally-pressing keyboard row following a rear end of the pressing keyboard rows, and including a second keyboard pressing the rear immersion nozzle via the lower face in the flange before pushing out the foremost immersion nozzle.

A system of 3D printing using a high temperature 3D print head that functions as a modified ink jet printer. The print head has the ability to print high temperature material such as metal, silicon carbide, and other high temperature material as opposed to inks or plastics. The print head is fabricated from a high temperature material to maintain structural integrity while operation at temperatures above the melting temperature for the material that is being printed.

A system of 3D printing using a high temperature 3D print head that functions as a modified ink jet printer. The print head has the ability to print high temperature material such as metal, silicon carbide, and other high temperature material as opposed to inks or plastics. The print head is fabricated from a high temperature material to maintain structural integrity while operation at temperatures above the melting temperature for the material that is being printed.

A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.

A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.

A machine and process for making a composite battery electrode with a conductive lead cast ribbon extending along and attached to a portion of a carbon fiber material. A lead ribbon may be continuously cast along a longitudinally elongate strip of carbon fiber material. The ribbon may be cast along an edge or edges of a longitudinally elongate strip of carbon fiber material.

A continuous casting nozzle 1 includes a nozzle main body 2 and a nozzle hole 3 formed to extend through the nozzle main body so that molten steel flows therethrough, and an alumina-hardly-adherable refractory 5 containing components of MgO, CaO and SiO.sub.2 is disposed on an inner surface defining the nozzle hole. Consequently, even when a temperature of the nozzle is low, adhesion of inclusions in molten steel to a portion in contact with the molten steel can be reduced, with the result that the nozzle hole can be prevented from being blocked and the continuous casting nozzle can contribute to an improvement in the steel quality.

A continuous casting nozzle 1 includes a nozzle main body 2 and a nozzle hole 3 formed to extend through the nozzle main body so that molten steel flows therethrough, and an alumina-hardly-adherable refractory 5 containing components of MgO, CaO and SiO.sub.2 is disposed on an inner surface defining the nozzle hole. Consequently, even when a temperature of the nozzle is low, adhesion of inclusions in molten steel to a portion in contact with the molten steel can be reduced, with the result that the nozzle hole can be prevented from being blocked and the continuous casting nozzle can contribute to an improvement in the steel quality.

The manufacture of a metal turbomachine part, comprising steps consisting of melting a titanium-aluminium intermetallic compound by plasma torch in a ring mould, extracting therefrom an ingot, as cast, in a state cooled from molten, cutting the ingot into at least one blank with an external shape that is simpler than the more complex one of said part to be manufactured, and machining the blank in order to obtain the part with said more complex external shape.