The modern electroplater; a complete book considering fully the elementary principles of electro deposition of metals, their practical application and industrial use . Fig. 138.—Ball Burnishing Machine(The Baird Machine Co.) must be designed to concentrate the mass of piecesand balls to gain such weight as will produce the nec-essary pressure on the bottom layers. As a protectionagainst excessive bruising, a lining of maple, or otherhard wood, is provided. The burnishing process is quite simple. The pieces 224 The Modern Electroplater to be burnished are placed in the barrel with severalhundre
The modern electroplater; a complete book considering fully the elementary principles of electro deposition of metals, their practical application and industrial use . Fig. 138.—Ball Burnishing Machine(The Baird Machine Co.) must be designed to concentrate the mass of piecesand balls to gain such weight as will produce the nec-essary pressure on the bottom layers. As a protectionagainst excessive bruising, a lining of maple, or otherhard wood, is provided. The burnishing process is quite simple. The pieces 224 The Modern Electroplater to be burnished are placed in the barrel with severalhundred pounds of small steel balls. There is littledanger of using too large a quantity of steel balls;rather the risk lies in the other direction. A goodplan is to allow approximately twice the quantity ofballs as of work, so the articles will not strike against. Fig. 139.—No Wave Action in a Full Barrel. The of Ball Burnishing Machine each other; but in all instances the barrel must becompletely full. Dissolve six to ten ounces of goodsoap, free from alkali, in a bucket of hot water. Assoon as this solution is poured into the barrel, thecover may be secured in place, and the machine setto revolving. It is suggested that in selecting the size of the ballsfor burnishing, attention should be given to the char-acter of surface of the articles. Steel balls may be Burnishing 225 secured in sizes from % incn to y2 inch in work having crevices or depressions, the smallersize balls will obviously produce the best burnishingeffect. A mixture of several sizes is permissible. The manager of the plating room will find it tohis advantage to construct the sifting device shown - Frame -?Semen- ! I a »-j-j------t- ssss: -Bottom box into which steel balls-fall-- Fig. 140.—Separating Device for Use with Steel Ball Burn-ish
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectelectro, bookyear1920
