![]() ![]() Teapot crucibles are shown in figure 189. Crucibles, such as shown in figure 188, are a type of lip-pouring ladle. ![]() The lip-pouring ladle is shown in figure 186 and the teapot, or bottom-pouring ladle, is shown in figure 187. Ladles used aboard repair ships are of two basic types. ![]() Any ladle in a doubtful condition should not be used. When geared ladles are used, any indication of trouble should be immediately checked by carefully examining all gears for excessive tooth wear or broken teeth. To avoid accidents, frequent and careful inspection should be made of all parts of the metal-handling equipment (bowls, bails, trunnions, etc.) to detect badly scaled or cracked areas. Because of the high temperatures involved, a reasonable factor of safety should be used when lining a ladle or when deciding whether an old lining is fit for use. The ladle equipment should be designed for high structural strength and, in the case of geared ladles, for foolproof mechanical operation. Pouring is a critical operation in the production of a casting and one which should be carefully conducted. ![]()
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