. Canadian foundryman (1921). bottom printto guide the vane cores, and beforeramming the bottom part into the moldan iron ring bored to fit the bottom printis put in place around the print and tightagainst the pattern. This ring is rammedinto the mold and remains there. Beforeramming the cope, the pattern is used asa core box and a core made and core is put back in the pattern andrammed up as part of the mold and se-cured to the bars of the cope. The restof the molding is straight ahead workwhich it is not necessary to describe indetail. Now For the Cores In the making of the vane c
. Canadian foundryman (1921). bottom printto guide the vane cores, and beforeramming the bottom part into the moldan iron ring bored to fit the bottom printis put in place around the print and tightagainst the pattern. This ring is rammedinto the mold and remains there. Beforeramming the cope, the pattern is used asa core box and a core made and core is put back in the pattern andrammed up as part of the mold and se-cured to the bars of the cope. The restof the molding is straight ahead workwhich it is not necessary to describe indetail. Now For the Cores In the making of the vane cores, afterthe core is rammed up and part of thecore box taken away, great care must beexercised in packing sand in the boxback of the core in order to level it upso as to bed on the plate, as the core isof such a twisted shape and this exactshape must be preserved. This can bevery materially helped by building bricksin with the backing up sand so as tomake a good substantial bearing onwhich to roll the core, thus preventing. FIG. 1—VANE CORES^ BEING ASSEMBLED ON LIFTING PLATE. NOTE CORE-BOX AND IN REAR TOGETHER WITH HUB CORE WHICH CONTAINS GATE. FIG. 2—VANE CORES ASSEMBLED AND SUSPENDED FROM CRANE. NOTELIFTING PLATE ON BOTTOM. AND BAND AROUND OUTSIDE. May. 1921 CANADIAN FOUNDRYMAN 23 any possibility of it springing out ofshape. These cores must be very carefullyvented as the surface is great and almostentirely surrounded with molten metal,and the gas must come off quickly. Assembling the Cores After the cores are made, the nextstep is the assembling of them on a platefhe exact size of the bottom print, andincidentally the exact size of the ringwhich we have described as having beenrammed into the mold and fitting around better understood by looking at Fig. this stage the joints of the cores arefilled up, blacked, and put in the oventill thoroughly dry. Setting the Vane Cores When ready to set the vane cores thecrane slings are attached to the liftingplate and the enti
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfoundri, bookyear1921
