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LADLE. Metal receptacle frequently lined with refractories used for transporting and pouring molten metal. Types include hand, bull, crane, bottom-pour, holding, teapot, trolley, shank, lip-pour, buggy, truck, mixing reservoir.
LEAKERS. Foundry term for castings which fail to meet liquid or gas pressure tests.
LIFTERS. Metal tool for removing loose sand from cope or drag before closing mold. Also, a device which is attached to the cope, to hold the sand together when the cope is lifted.
LINING. Inside refractory layer or firebrick, clay, sand, or other material in a furnace or ladle.
LINING, MONOLITHIC. A lining made without the customary layers and joints of a brick wall. Usually made by tamping or casting refractory material into place, drying and then burning in places on the job.
LINSEED OIL. The most common of all drying oils and used in the foundry principally as a base for core oil. Produced by applying pressure to the seeds of flax, the liquid constituent being linseed oil.
LOAM. A mixture of sand, silt, and clay particles in about equal portions; i.e. roughly 50% sand and 50% silt and sand.
LOST WAX PROCESS. A pattern casting process in which a wax or thermoplastic pattern is used. The pattern is invested in a refractory slurry; after the mold is dry, the pattern is melted or burned out of the mold cavity.
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