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 (1921)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 230
Fig. 367 Pattern Assembled on False Cope Ready for Ramming Cope Mold method of constructing the pattern should be used, provided theresults are accurate. A nailed and glued pattern using a green-sandcore for molding the inside would produce the smoothest casting,Fig. 366. The pattern, however,… … Fig. 368. Wooden Form should be made to fit the inside to hold it in shape while rammingthe drag mold. Use of Form, The construction considered will be to furnishthe molder with separate flanges and lagging, and assemble the partson a wooden form, Fig. 367, or a dry-sand core can often be used…
Patternmaking
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