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countable and uncountable, plural sprues
(medicine) A tropical disease causing a sore throat and tongue, and disturbed digestion; psilosis. examples
plural sprues
(founding) The hole through which melted metal is poured into the gate, and thence into the mold. examples
(founding) Material that cools in the feed channels to a mold. examples
third-person singular simple present sprues, present participle spruing or sprueing, simple past and past participle sprued
To remove the sprues (material left in feed channels) from a cast piece. quotations examples
In the brass spruing room is what is known as a Todd water tumbler, used for brass castings.
1882 August 15, “Details of a brass and iron foundry”, in American Machinist, page 3
The method adopted for sprueing the wax pattern is much more important to the success of the inlay than is generally realized.
1947, The Ney Inlay Book, J. M. Ney Company, page 17
The pattern is completed in its final contour, is then sprued, invested and burned out of the investment, and the gold alloy is cast in the same manner as when the indirect technique is utilized
1976, Hazel Torres, Ann Beard Ehrlich, Modern Dental Assisting, page 662
If we are to cast a simple pattern like a small ball we have at least three methods of sprueing the wax pattern (Fig. 6).
1985, Edward R. Dootz, “Technology of Casting and Soldering Alloys for Metal-Ceramic Applications”, in Conference on Recent Developments in Dental Ceramics, volume 6, numbers 1–2, page 86
To provide for constructing and sprueing the wax sculpture, as described in Chapters 1 and 2, we must obviously have a wax working area, which in a foundry may also be referred to as the patternmaking area.
1985, Howard Hitchcock, Out of the Fiery Furnace: Casting Sculpture from Ceramic Shell Molds, Los Altos, Calif.: William Kaufmann, Inc., page 50