Scientific American Supplement, No. 1157, March 5, 1898
Scientific American Supplement, No. 1157, March 5, 1898
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[Illustration: FIG. 1. --ORDINARY METHOD OF DRAWING PATTERN SPIKE ANDRAPPER. ] At the risk of appearing pedantic, but with a view to developing anappreciation of the true function of the method of pattern drawingused in this machine, attention is called to the following sectionalviews of moulds and ways of drawing patterns occurring in machinemoulding. Fig. 1 shows an ordinary "gate" of fitting patterns beingdrawn from the drag or nowel part of the mould by means of a spike andrapper wielded by... the moulder's hand after cope and drag have beenrammed together on a "squeezer" and cope has been removed. Frequentlythe pernicious "swab" is used to soak and so strengthen joint outlinesof the sand before drawing patterns, in such cases as this. In thiscase, before cope is lifted, these patterns must be vigorously rappedthrough the cope; an amount depending (and so does the size of thecasting) upon the mood and strength of the moulder.
Fig. 2 shows the stripping or drop plate method of drawing patterns.
What to read after Scientific American Supplement, No. 1157, March 5, 1898?
You can find similar books in the "Read Also" column, or choose other free books by Various to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
[Illustration: FIG. 1. --ORDINARY METHOD OF DRAWING PATTERN SPIKE ANDRAPPER. ] At the risk of appearing pedantic, but with a view to developing anappreciation of the true function of the method of pattern drawingused in this machine, attention is called to the following sectionalviews of moulds and ways of drawing patterns occurring in machinemoulding. Fig. 1 shows an ordinary "gate" of fitting patterns beingdrawn from the drag or nowel part of the mould by means of a spike andrapper wielded by... the moulder's hand after cope and drag have beenrammed together on a "squeezer" and cope has been removed. Frequentlythe pernicious "swab" is used to soak and so strengthen joint outlinesof the sand before drawing patterns, in such cases as this. In thiscase, before cope is lifted, these patterns must be vigorously rappedthrough the cope; an amount depending (and so does the size of thecasting) upon the mood and strength of the moulder.
Fig. 2 shows the stripping or drop plate method of drawing patterns.
What to read after Scientific American Supplement, No. 1157, March 5, 1898?
You can find similar books in the "Read Also" column, or choose other free books by Various to read onlineMoreLess
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