Foundry Practice; a Text book for Molders, Students And Apprentices
The book Foundry Practice; a Text book for Molders, Students And Apprentices was written by author Palmer, R. H. (Reginald Heber), B. 1853 Here you can read free online of Foundry Practice; a Text book for Molders, Students And Apprentices book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Foundry Practice; a Text book for Molders, Students And Apprentices a good or bad book?
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— Molding the Drag Plate and Carrying Plate. wood is bedded at the center and with a pair of trammels two circles A and B, Fig. 8i, representing respectively the outside and inside diameter of the plate, are traced on the face of the bed. A piece of plank C, of somewhat greater thickness than the plate, has one edge formed to a section of the outer circle, LOAM MOLDING II9 and a similar plank E is cut to form a section of the inner circle. These two pieces of plank are successively moved around... the circumference of the circle traced in the sand, and sand is rammed up against them and struck off flush with the top of the plank. We thus have formed in the sand bed a depression of the same size and shape as the desired drag plate, but of somewhat greater depth. As the plate must be handled by the crane it is necessary to cast on it four lugs D, which quarter the circle. These lugs are formed by placing a block of wood of the desired size and shape against the segment C at the proper points on the circle and ramming sand around it.
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