Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. (1905)
Hand, L. H. (Louis Henry), b. 1854 · Chicago, F. J. Drake & co. · leaf 112
te the sweep. The firstsweep is then put on, the sand packed about thestake and a hill is formed representing the out- AND FOUNDRY PRACTICE 107 side of the casting. When complete, a parting ismade and the cope placed in position andrammed up. Gates are then made and the coperemoved. The second… … A much more diflficult operation is one where thecasting is of such a form that it is impossible tolift the cope from the outside. (See Fig. 62.)In this instance a hole is swept into the drag—orfoundry floor, as the case may be—having theform of the inside of the casting. (See Fig. 64.)The cope is…
Patternmaking · Founding
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