Foseco has launched HOLLOTEX Shroud - a new process that can be effectively applied in steel foundries. A shroud is positioned in the mold, the bottom of the shroud protrudes into a filter box located at the base of the mold. When the ladle is in position, the shroud is mechanically lifted so there is a seal between the nozzle and the shroud. The metal flows from the nozzle, through the shroud into the filter box, and then to the runner. As the metal flows it is protected from exposure to air, eliminating the potential for air aspiration. The resultant casting is exceptionally clean and able to successfully pass through x-ray and other non-destructive evaluations rapidly. The physical properties of the casting are markedly improved through the elimination of reoxidation particles and films.
- + No air entrainment
- + Reduced unacceptable X-ray and MPI defects
- + Reduced repair requirements
- + Pouring temperature reduction
- + Improvement in mechanical properties