Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1916)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 73
e of A. Parting sand is applied to the new surface, after which the cope is placed in position and rammed up. When the cope anddrag have been separated,the upper half A of thepattern is taken out, andthe cope is returned toits place on the drag. Thewhole flask is now turnedover, and the drag… … Fig. 124. Dovetailed Slide Fig. 125. Loose-Piece Pattern 7?3i Aim ;Si \_ Ttir if Fig. 126. Loose Pieces in Mold Many other examples might be given, as the case of the commontwo-flange pulley, which, when small, is often molded in this way. PATTERN MAKING 59 Loose-Piece Patterns. It is frequently…
Patternmaking
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