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Home > Art, Film & Photography > Cyclopedia of Mechanical Engineering Volume 3; A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry, Work, Metallurgy, Steam Boilers and Engines, Gas Producers, Gas Engines, Automobiles, Elevators, Refrig
Cyclopedia of Mechanical Engineering Volume 3; A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry, Work, Metallurgy, Steam Boilers and Engines, Gas Producers, Gas Engines, Automobiles, Elevators, Refrig

Cyclopedia of Mechanical Engineering Volume 3; A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry, Work, Metallurgy, Steam Boilers and Engines, Gas Producers, Gas Engines, Automobiles, Elevators, Refrig


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...required for casting. The first cope is then termed, not a match, but a false cope. For very light wooden patterns which may or may not have irregular parting lines, the pattern maker builds up wooden forms to support the thin wood while the drag is being packed and to give the proper joint surface to the sand. This board serves exactly the same purpose as the sand match and false cope, but it is termed a follow board. See Pattern Making, page 137. So far the patterns used have been mao'e in one piece, but a flat joint is the most economical for the molder, when many castings are required. Generally such pieces as bushings, pipe connections and symmetrical machine parts are made in halves; one piece of the pattern remaining in each part of the flask when the mold is separated. There are many cases, too, where, to make a flat joint for the mold, the pattern maker can separate one or more projections so as to have the main part of the pattern in the drag and let these loose parts lift off in the cope. The small punch frame and the gas engine piston, shown in Fig. 44, are examples of these two classes of patterns. At A, the section through the patterns shows the methods of matching them together. Pattern on mo/d board F ig. 44. Split and Loose-Piece Pat terns. B shows the drag parts of the patterns in position for molding. At C is the section through the mold and the plan of the drag showing how the gates are connected. Attention is directed to the use of the horn sprue--the sprue pattern is shown at a--by which the metal enters the mold at the bottom. If the gate were cut at the joint surface there would be danger of "cutting the sand" on top of the green sand core /; as the metal flowed in upon it. Some work has projections on it which lie above or...


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Product Details
  • ISBN-13: 9781130225532
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 98
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1130225534
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 191 gr


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Cyclopedia of Mechanical Engineering Volume 3; A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry, Work, Metallurgy, Steam Boilers and Engines, Gas Producers, Gas Engines, Automobiles, Elevators, Refrig
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Cyclopedia of Mechanical Engineering Volume 3; A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry, Work, Metallurgy, Steam Boilers and Engines, Gas Producers, Gas Engines, Automobiles, Elevators, Refrig
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Cyclopedia of Mechanical Engineering Volume 3; A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry, Work, Metallurgy, Steam Boilers and Engines, Gas Producers, Gas Engines, Automobiles, Elevators, Refrig

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