The Iron-Founder: A Comprehensive Treaties on the Art of Moulding. Including Chapters on Core-Making; Loam, Dry-Sand, and Green-Sand Moulding ... [Etc.]
The Iron-Founder: A Comprehensive Treaties on the Art of Moulding. Including Chapters on Core-Making; Loam, Dry-Sand, and Green-Sand Moulding ... [Etc.]
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. 1892 Excerpt: ...in loam, requiring less intelligence, as a rule, to make both a safe mould and a creditable casting. To meet these emergencies, dry sand is sometimes resorted to; but this method also has its limits, either because the several parts needed for the construction of the mould cause undue expense, or the casting, if too ...
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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. 1892 Excerpt: ...in loam, requiring less intelligence, as a rule, to make both a safe mould and a creditable casting. To meet these emergencies, dry sand is sometimes resorted to; but this method also has its limits, either because the several parts needed for the construction of the mould cause undue expense, or the casting, if too ponderous, would require flasks too large for safe handling. To obviate this latter difficulty, recourse is frequently had to bedding in the floor, using dry sand materials for its construction, and drying the mould where it is made with improvised ovens or fire-pans; but as this is only a makeshift, and not unfrequently a poor one, we shall not dwell upon it. I am willing to admit that very many of the heavy castings required for mill and forge works, building purposes, and all such as call for strength only, may with propriety be made in green sand; but when along with strength beauty must be combined, then look about for the best method to meet the dual demand, and, when all the pros and cons have been gone over, I conjecture that a loam mould will be decided upon as the safest and best for the job. To most moulders the idea of making a piece in loam when the entire pattern is supplied seems ridiculous; but a little consideration of the superior advantages offered by this method will soon dispel this illusion. Again, how often we see castings made on end in loam, at great risk and much additional cost to the founder, simply because, perhaps, one tenth of the outside mould can be swept by the spindle; when, if a few lags had been attached to the patterns (which must be made in any case), an entire pattern would be obtained from which to mould on its flat in such position as would best meet the several requirements of the job. Many founders obj...
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