Canadian transportation & distribution management . than the fact that the axle boxopening has a cross brace at the bottom toprevent the top rail from warping theframe out of shape while cooling. Theshrinkage is thus equalized top and pattern shown in fig. 1, standing againstthe cope, has just been drawn from thesand of the mould. The mould is entirelycontained in the flask, the cope presentinga smooth surface. A special grade of sand seen in fig. 2, the pouring operation. Sag-ging is undesirable, as it tends to break thesand of the mould in addition to warpingthe resultant casting.
Canadian transportation & distribution management . than the fact that the axle boxopening has a cross brace at the bottom toprevent the top rail from warping theframe out of shape while cooling. Theshrinkage is thus equalized top and pattern shown in fig. 1, standing againstthe cope, has just been drawn from thesand of the mould. The mould is entirelycontained in the flask, the cope presentinga smooth surface. A special grade of sand seen in fig. 2, the pouring operation. Sag-ging is undesirable, as it tends to break thesand of the mould in addition to warpingthe resultant casting. The flask, with contained mould, is liftedby a crane and carried across to an ovencar, on which it is subjected to a surfacetreatment before it is baked. The surfacetreatment consists in filling the surface ofthe mould with long wire nails, closelyspaced, especially along the edges of themould where the sand is liable to breakdown from the rolling action of the moltenmetal traversing the mould. The nailedsurface of the mould is next treated with. Fig. i.—Cope and Flask with Drawn Pattern, and Mould ready to Pour. Fig. -Pouring a Cast Steel Locomotive Frame. the place where the majority make theirfirst acquaintance with the cast steel consequence, it is believed that a briefdescription of the stages through which theframe passes before reaching the machineshop will not only be appreciated but willalso be of value in leading to a properunderstanding of the eare and attention re-quired before the production of the frameis possible. The information contained inthis article was obtained at the CanadianSteel Foundries new plant at LonguePointe, Montreal, from Wm. Cox, FoundrySuperintendent. is used, and while being introduced into themould is thoroughly rammed—to a greaterdegree than is necessary for cast the flask is filled, and rammed full tothe level of the top of the flask, the surfaceis treated with a layer of separating sand,and the cope placed on top an
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherdonmi, bookyear1913
