. Canadian machinery and metalworking (January-June 1919). tted down into the crankpit between the bearings. So completeare these flasks constructed that verylittle gaggering is required. After the cope is rammed up to theshaft bearings they are bedded in andanother parting made for the small copeD which covers this portion. After ram-ming up the small cope the remainderof the work as regards the molding ofthe outside of the casting will requirevery little detailed explanation. Thesmall cope is lifted off and put to oneside, the bearings are swabbed and vent-ed and drawn out, after which the h
. Canadian machinery and metalworking (January-June 1919). tted down into the crankpit between the bearings. So completeare these flasks constructed that verylittle gaggering is required. After the cope is rammed up to theshaft bearings they are bedded in andanother parting made for the small copeD which covers this portion. After ram-ming up the small cope the remainderof the work as regards the molding ofthe outside of the casting will requirevery little detailed explanation. Thesmall cope is lifted off and put to oneside, the bearings are swabbed and vent-ed and drawn out, after which the hornswhich hold the shaft bearings are rap-ped and the main cope carefully liftedoff and rolled over. The cheek is nowswabbed and vented all around andscored off as shown at F, Figs. 2 and 3. In lifting the cheek the pattern issecured and lifted with it and rolled overon horses, thus giving the workman anopportunity to see that his joint is allright before drawing the pattern. Afterdrawing the pattern the mold is finish-ed and plumbagoed in the usual ENGINE BEDS AS THEY COME FROM THE MOULD. January 30, 1919 CANADIAN MAC II I N KRY >ui Building the Core After the removal of the cheek andpattern the drag will show the imprintof the bottom of the patterns which ispractically flat, all but the bearingstrips on each side and which projecta short distance into the sand. On topof this impression the core boxes are(1 and the core built in its place(and it is right here that the real me-chanical ability of the molder is put toteat). The steel bottom G, Fig. 2,.onsists of a sheet steel plate some-what larger than the core. This plateis ground all around the outer edge soas to give a clean surface as well as aneasily fused body for the melted metalirn onte. The manner of castingin the steel bottom is to have it builtinto the core with the ground edge pro-jecting out from the core as shown ath, Fig. 2, into the space allowed for thecasting and about an inch above thebottom. This gi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19
