High school manual training course in woodwork, including cost of equipment and supplies and studies on trees and wood (1905)
Ritchey, Samuel Edward, 1866- · New York, American Book Company · leaf 167
E 3 Fig. 301 Fig. 302 length and diameter required, and on both ends wouldbe turned core-prints, having the diameter of the hole,and of reasonable length (Fig. 302). These printsbecome, then, a part of the pattern, and together withthe pattern, will leave a print or impression in the sand.This… … Fig. 303 166 METHODS OF MOLDING The metal pours in around the core, filling the im-pression made by the pattern. The core fills the impression made by the core prints,so no metal pours into these holes. When cool, the core is broken up and rammed outof the casting, a new core being required for…
Woodwork (Manual training) · Cabinetwork
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