ir the metal in the pot with an iron rod,and skim the metal until it is clean. If themetal barely sticks to the hot rod, it is atthe best heat for casting. A plate whichis made properly will require very littlescraping. It is usually well to scrape theparts which have little draft, the remain-der… … FIG. V.Frames in place and sand filled In to form plate. the mould in the same manner as describedpreviously, and place it in the oven to dry.The time spent by the pattern maker incleaning and preparing a cast iron plate formoulding, will more than offset the differ-ence in the cost of the metal.…
Patternmaking
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