Canadian foundryman (1921) . There are other worse jobs wheredraw-back plates are used which could berolled back to much better design of pattern sometimes standsin the way of this method but this canusually be arranged to suit. In design-ing a pattern for this system of moldingthe pattern maker should be on thejob and be sure that there are no ob-structions in the way jof the flask swing-ing off instead of lifting straight. Forsmall jobs the hinged flask has everyadvantage, and to show its adaptabilityto certain small castings I will showsketches of one particular casting I have
Canadian foundryman (1921) . There are other worse jobs wheredraw-back plates are used which could berolled back to much better design of pattern sometimes standsin the way of this method but this canusually be arranged to suit. In design-ing a pattern for this system of moldingthe pattern maker should be on thejob and be sure that there are no ob-structions in the way jof the flask swing-ing off instead of lifting straight. Forsmall jobs the hinged flask has everyadvantage, and to show its adaptabilityto certain small castings I will showsketches of one particular casting I havein mind. Of course, in producing anycasting for a specific purpose it may benecessary that it should be of an exact. FIG. 1- A NICE ENOUGH APPEARANCE BUTHARD TO MOLD. FIG. 2-LOOKS JUST AS NEAT, HAS ALL THEGOOD QUALITIES AND IS EASY TO MOLD. design, and in such case it is, of course,necessary that the pattern maker designhis pattern accordingly; using due con-sideration for the molding of it with theleast amount of trouble. The molderin turn, must make the proper arrange-ments to do the job. But there are in-numerable cases where design is of littleconsequence and where an easily moldedpattern would bring as good a pricedcasting as a more difficult one. Wherethis is the case it would look the part ofwisdom to choose the easily molded pat-tern. The casting which I have in mindwas one which was produced in quanti-ties running up into the thousands everyseason and where the design was of nopossible consideration. It was what wasknown as a water bowl for a the benefit of those who havenever farmed it might be explained thatin modern cow-stables the cow is wateredwithout leaving the stall.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfoundri, bookyear1921
