ABSTRACT
In foundries, molten metals are cast into objects of desired shapes. Castings of iron, steel, light metals (such as aluminum), and heavy metals (such as copper and zinc) are made in units that may be independent or part of a production line. Auto manufacturing facilities usually have foundries within their production facilities or as ancillaries. The main production steps include: (1) the preparation of raw materials; (2) metal melting; (3) preparation of molds; (4) casting; (5) finishing stages which includes fettling and tumbling.
