The practical metal-worker's assistant : containing the arts of working all metals and alloys, forging of iron and steel, hardening and tempering, melting and mixing, casting and founding, works in sheet metal, the processes dependent on the ductility of the metals, soldering, and the most improved processes, and tools employed by metal-workers, with the application of the art of electro-metallurgy to manufacturing processes : collected from original sources, and from the works of Holtzapffel, Bergeron, Leupold, Plumier, Napier, and others ... (1851)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 154
much better, and metal the best of all. Many works require core-boxes to be made expressly for them;thus the dotted line in Fig. 100 shows an enlargement in the centre forcoring a hole of that particular section. Figs. 103 and 104 repre- INSTRUCTIONS FOR MOULDING CORED WORKS. 149 sent the two… … 102. 106. 105. 104. 103. from which the object is moulded, the shaded parts represent theprojections, or core-prints, which imprint within the mould the placeswhere the extremities of the core, Fig. 106, are supported whenplaced therein. The various kinds of core-boxes are rammed full of new…
Metal-work · Electrometallurgy · Metallurgy
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