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 71
mm i m m ^H y^M ^■.• Fig. 117 Cross-Section of CapPattern Fig. 118, Cap Rammed in Drag up as usual. When the drag is turned over, the position of- thepattern in the sand is as shown in cross-section in Fig. 118. Thesand that may have entered the curve cde is lifted out, and thenecessary draft is… … Fig. 119. Coped-Out Mold for Cap the curve cde will be lifted with it. The pattern is now removed,the bolt-hole cores are placed in position, and the cope is returnedto its place on the drag. In this case the core prints should be in length at least twicethe thickness of the metal through which the…
Patternmaking
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