A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . or. In order to effectthis, every projection and every aperture in the casting must be at an exact distance, andthis can only be attained by employing such a system as that of plate-casting, where thepattern is attached firmly to a plate, and it is impossible for the moulder to distort or injurethe impression. Plate-casting has been long known, but was practically confined for manyyears to the production of small articles, such as cast nails and rivets. In a pla
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . or. In order to effectthis, every projection and every aperture in the casting must be at an exact distance, andthis can only be attained by employing such a system as that of plate-casting, where thepattern is attached firmly to a plate, and it is impossible for the moulder to distort or injurethe impression. Plate-casting has been long known, but was practically confined for manyyears to the production of small articles, such as cast nails and rivets. In a plate-mould for rivet-casting, the shafts of the rivets are attached to one side of theplate, which is f in. thick, and planed on both sides. The heads of the rivets are on theopposite side of the plate. The guides on the upper and lower flask admit the plate to fitbetween them, and when the plate is withdrawn the upper and lower flask close perfectly,and are in all respects like ordinary moulders flasks. The principle of moulding is verysimple, and can be performed without skilled labor ten times as fast as ordinary moulding, 311. A, sand. B B, flask. K K, rivet pattoru. r, plate and with far greater accuracy. The plate is inserted between the upper and lower flasks,and sand is filled in; the plate is then withdrawn by simply lifting it; the guides preventany shaking in this operation; when the flasks are closed the impression of the head ofeach rivet is exactly perpendicular to its shaft. The first expense of patterns and plates ofthis description is large, but the accuracy and rapidity of the process of moulding is soadvantageous as to cause us to look to the applications of plate-castings becoming very ex-tensive, since the requirements of the machine-maker demand every year better castings atlower prices. When both sides of a pattern are .symmetrical, one-half only need be attached to theBmooth plate, the other face of the plate being left blank. An impression of the pattern
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
