American Foundry Practice Treating of Loam Dry Sand And Green Sand Moulding
The book American Foundry Practice Treating of Loam Dry Sand And Green Sand Moulding was written by author Thomas Dyson West Here you can read free online of American Foundry Practice Treating of Loam Dry Sand And Green Sand Moulding book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is American Foundry Practice Treating of Loam Dry Sand And Green Sand Moulding a good or bad book?
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So also many castings cast hori- zontally have been found to be larger than the pattern. Again the question could be asked, " What is the cause of this ?" to answer which it can be said : " The straining of moulds. " A moulder or pattern maker that has had experience in making heavy rolls will, or should, always make the lower end of a swept mould, or the pattern, smaller than the end that is cast up. How much smaller will depend on the length and body of the casting. The difference will vary f...rom -jJg- up to i of an inch. I have seen a rolling mill boss come into a foundry with such fire in his eyes that the poor moulder has trembled all over when asked, "Why in the name of common sense he could not make the lower end of his rolls the same size as the upper end, and not have the wabbler so much too large that it would take a good chipper a week to chip it so as to have the coupling that goes easy on the top end fit the bottom end?" That castings contract vertically has often been proved in making rolls.
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