. Canadian foundryman (1918). e week whenthe young man appeared at the officeto make his excuses and explanations. You should have returned from yourvacation last Monday, sir, said his em-ployer. You were having a good timeat that summer resort, I suppose, andthought you were entitled to three day-*of grace. N-not exactly, stammered the youngman, with heightened color. Laura. October, 1918. 243 Bettering the Quality of Foundry Sand Mixtures Investigations Were Undertaken to Determine the Mixtures ofOld and New Sand Best Adapted to Producing Good Castings—The Author, in a Paper Read Before the
. Canadian foundryman (1918). e week whenthe young man appeared at the officeto make his excuses and explanations. You should have returned from yourvacation last Monday, sir, said his em-ployer. You were having a good timeat that summer resort, I suppose, andthought you were entitled to three day-*of grace. N-not exactly, stammered the youngman, with heightened color. Laura. October, 1918. 243 Bettering the Quality of Foundry Sand Mixtures Investigations Were Undertaken to Determine the Mixtures ofOld and New Sand Best Adapted to Producing Good Castings—The Author, in a Paper Read Before the American FoundrymansAssociation at Milwaukee, Points Out the Results Obtained in His Investigations By HENRY B. HANLEY IN THESE times it is, of course, ex-ceedingly important to reduce the costof foundry sand mixtures, not only bydeceasing the amou::t of new sand usedbut also by increasing- the quantity of oldsand that can be used over again. Sand preparation has only recently re-ceived the attention that it deserves, prob-. FIG. 1--SAND MIXING MACHINE 07 THE MULLER TYPE. ably because ether problems occupied th;attention of the foundrymen wereconsidered more important from thestandpoint of the quality of the castingsand the cost of production. Differentmethods of molding mixtures of metal forvarious weights of castings and for cast-ings for different purposes has occupiedthe attention of the foundrymen to theexclusion of the now considered importantsand mixing department. There is no doubt that ultimately waysand means will be found to use up all ofthe old sand; also that the old cores willbe broken up and used over again Fur-thermore, unless the foundry is so smallthat it cannot afford the expense it isabsolutely necessary to employ a metal-lurgist or chemist to experiment with thedifferent kinds of new sand to investigatethe possible reduction of binder for coresand with the use of cheaper binder thanwas formerly used, ;>.nd generally to su-pervise the more thorough
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Keywords: ., bookcentury1900, bookdecade1910, booksubjec, booksubjectfoundries
