초록 ▼

A composition of flake graphite, binder clay and a refractory material is extruded from an auger machine into a mold to form a cylindrical graphitic casting nozzle brick. The mold includes a coaxial core terminating short of an extrusion die of the auger machine, so that the graphitic casting nozzle

A composition of flake graphite, binder clay and a refractory material is extruded from an auger machine into a mold to form a cylindrical graphitic casting nozzle brick. The mold includes a coaxial core terminating short of an extrusion die of the auger machine, so that the graphitic casting nozzle brick as extruded has a longitudinal bore with one end closed, with transverse holes being subsequently defined through the nozzle brick across the bore adjacent to the closed end. As an alternative, a coaxial core may be connected to an extrusion screw of the auger machine to define an axial through bore in the casting nozzle brick as the latter is extruded.

대표청구항 ▼

A method of manufacturing a graphitic casting nozzle brick using an auger machine having an extrusion screw and an extrusion die, comprising the steps of: providing a mold connected to the extrusion die and including a central core therein which terminates short of said extrusion die; extruding a ma

A method of manufacturing a graphitic casting nozzle brick using an auger machine having an extrusion screw and an extrusion die, comprising the steps of: providing a mold connected to the extrusion die and including a central core therein which terminates short of said extrusion die; extruding a mass of graphitic material through said extrusion die into said mold without separating and rejoining said mass during said extruding and after leaving contact with said screw and prior to contact with said core and forming a graphitic casting nozzle brick therein which has a longitudinal bore defined by said central core with one axial end of the bore closed, wherein said graphitic material is a mixture comprising graphite in an amount of at least 10% by weight; and providing at least one stage of deaeration in said auger machine and dearating said graphitic material thereby in order to prevent lamination and enhance compact structure of said nozzle.