Modern Foundry Practice; Dealing with the Green-Sand, Dry-Sand and Loam Moulding Process; The Materials Used; Also Detailed Descriptions of the Machinery and Other Appliances Employed, with Pracitical Examples and Rules, Volume 2

Modern Foundry Practice; Dealing with the Green-Sand, Dry-Sand and Loam Moulding Process; The Materials Used; Also Detailed Descriptions of the Machinery and Other Appliances Employed, with Pracitical Examples and Rules, Volume 2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...face of the one and hollows in the other, which are then stopped up with plaster, and these are properly repeated in the final sand mould, E and F; these last therefore, when put together, form a complete mould for casting, Any number of succeeding moulds can be made from the original ramming blocks by the simple process of ramming, without any handling of the pattern or turning over the boxes, both top and bottom moulds being rammed independently and at the same time if desired. The parting being once accurately formed in the original mould, all the succeeding ones are necessarily correct, without any further care being required; and by carefully trimming the original, and by slightly paring down the inner edges of the parting faces, if requisite, the faces of the final sand moulds have a corresponding fulness, and are readily adjusted, after the first trial, to fit so closely together, that practically no fin is left on the castings. Also the labour of forming the gits and runners afresh for each casting mould is avoided, by having them completely imprinted upon each mould in the process of ramming; and by this means all risk is avoided of imperfect castings arising from want of uniform care or judgment in the formation of the gates by the moulder in the ordinary process. This is the more important in the case of difficult castings, where several trials may be required before the best mode of running the metal is ascertained so as to ensure sound, good castings; and by this process the exact repetition of the same plan is ensured, without requiring any further attention from the moulder. A small hollow is imprinted in the ramming block for the top box, into which the plug for forming the gate is rested while the box is rammed, and by...show more

Product details

  • Paperback | 230 pages
  • 188.98 x 246.13 x 12.19mm | 421.84g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236888308
  • 9781236888303