Induction-Heated Pouring Furnaces.

ABB's Presspour and Minipour induction-heated pouring furnaces ensure high cost-effectiveness by satisfying requirements such as: holding and pouring of the melt with a constant temperature and chemical composition; pouring of the melt free from slag inclusions; addition of inoculants and any alloying materials at exactly the right time and in the precisely metered quantity required; adaptation of the casting speed to the intake capacity of the mold; exact metering of the casting weight; adaptation to casting lines with continuous or intermittent transport systems; and reduction of material and personnel costs. The furnace and ladle systems help to improve productivity, reduce the level of returns and rejects, increase the quality of the castings and improve the working conditions in the foundry. The cylindrical Presspour has a pressure-tight cover. The filling and discharge channels end in the bottom of the furnace vessel. This configuration ensures practically slag-free pouring. The melt is forced under gas pressure from the induction-heated furnace vessel into the pour siphon, which has an outlet opening that can be plugged with a stopper. The level of molten metal in the pour siphon can be controlled to a constant height by the application of varying pressure levels to suit the changing filling level in the furnace vessel. The quantity of metal discharged from the pouring furnace per unit of time is determined by the distance traveled by the stopper and the diameter of the outlet opening. An infinitely adjustable pneumatic servo cylinder moves the stopper into the position required by the pouring program.