Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools (1916)
Griffith, Ira Samuel, 1874-1924 · Peoria, Ill., Manual Arts Press · leaf 326
Fig. 496. Snap Flask. 320 PATTERN MAKING. 321 floor with its sand, and the flask removed that it may beused to hold sand for still other molds, the snap fasteningspern.itting its easy removal. In Vv^. 497 is shown a floorflask. Tl is flask, like the snapTask, is divided into two parts,tie top pare… … Fig. 497. Floor Flask. when the shape of the pattern makesthis necessary, Fig. 498. 267. Molding Operations.—TheF.d. 498^ Three-Part principal typical operations involvedFlask. . , ,. , ,, in moldmg are as follows: (1) The drag flask is placed up-side down upon a mold-ing board or follower.(2) The…
Woodwork (Manual training)
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