Kaiser Aluminum Casting Extrusion Billet

Kaiser Aluminum’s process for direct chill casting of billets

A direct-chill casting system consists of a mold table on which the mold is mounted and through which water is directed to the mold, a platen-mounted bottom block, and a lined casting pit. Maximum length is determined by the depth of the casting pit. In most cases, the bottom block, attached to a platen, is raised and lowered hydraulically. When the correct ingot length is reached, the mold table is slid away so the solidified ingot can be removed from the casting pit.