![]() The resulting mold corresponds to one-half of the casting that will eventually be made. This consists of two parts, namely a top half and a bottom half, and sand is pressed into each of these two parts against the pattern. To cast a part, you first need a set of molding boxes. The machine’s advanced technology can produce small and large series and handle castings weighing between 50 kg and 500 kg. ![]() Proferro’s HWS EFA-SD7 high-pressure molding line works with box dimensions of 1600x1200x400x400+60. ![]() Before the molten iron is used for casting, thermal and spectrographic analyses are carried out in the lab to determine the carbon and silicon content, as well as other elements. The slack is used for road building and the construction industry. The molten iron flows out at the bottom through a tap hole, while on the other side of the furnace the liquid slag is drawn off through the slag hole. The entire process is controlled from the control room. The coke causes carburetion of the metal and removes any rust by deoxidization. Hot air is blown near the bottom around the melting zone where the temperature is approximately 1,500☌, enabling the iron and steel in the charge to melt. The charging system is fully automatic and the cupola consists of a long, vertical cylinder into which the charge is loaded from above. The hot air cupola has a melting capacity of 15 tons per hour and it can melt basic iron for both nodular and grey cast iron. The iron is melted in the hot air blast cupola furnace and it is then poured into the casting molds.
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