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 .. . in an inverted position and filled about half full,or within about two inches of the top, and thesand smoothed down solid. The pattern is thenturned with the spoke side up and pushed downhard into the sand. It is then taken out to seethat the impression is perfect, and a parting ismade at i. The pattern is then put back in itspla
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 .. . in an inverted position and filled about half full,or within about two inches of the top, and thesand smoothed down solid. The pattern is thenturned with the spoke side up and pushed downhard into the sand. It is then taken out to seethat the impression is perfect, and a parting ismade at i. The pattern is then put back in itsplace and the parting c-d and e-j is made. Th^ 74 PATTERN MAKING sand is then filled in to g-h and a second partingis made at c-g n-j. Now the drag is put in place. and rammed up. The flask is then inverted andthe vents made, when the pattern will appear asin Fig. o34. The cope, which should part along C o 73 e. J. •... • >.• &hoY/inq hoW I^rtjSt nrny levtoiildecl rn a It/opart the line c d i e f, is now removed, as is also thepattern from the line a b upv/ards. The flaskshould then be put together and turned over, AND FOUNDRY PRACTICE 75 removing the drag, which should part along theline c g hf, after which the flange is flask is now put together again and turnedover, which completes the work, and it is readyto receive the moulten metal. If the pattern isexactly right and the moulder is both expert andamiable, the casting can be made in this way,
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicagofjdrakeco
