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 216
W on the cope machine inFig. 329, locates the sprue. Advantages. These machines are in successful operation, theimprovements over the hand-rammed castings being more castingsper flask, doing away with the expense of making and setting thedry-sand cores, and the uniformity of the castings requiring… … Fig. 341. Sketch of Bearing-Cap Casting to mold the square hole in the upright position shown at d. Thisheel core and the setting of it was an expense; there was always anunevenness at the surface of the casting caused by the heel of thecore, which had to be ground smooth. To avoid these…
Patternmaking
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