. American engineer and railroad journal . y the drying room overhead it is ready for the grinding or break-ing down. This process is carried on in grinding rolls or cal-enders heated by steam. The rubber is put into a smooth sheetform, and after being sufficiently worked it is ready to receivethe compounds which are used toprepare it for the special pur-pose intended. The hose material is compounded differentlyfrom that used for making packing, each purpose requiring dif-ferent compouuds, which are all minerals, and the secrets andthe skill of the trade are chi flv in the selection and propor
. American engineer and railroad journal . y the drying room overhead it is ready for the grinding or break-ing down. This process is carried on in grinding rolls or cal-enders heated by steam. The rubber is put into a smooth sheetform, and after being sufficiently worked it is ready to receivethe compounds which are used toprepare it for the special pur-pose intended. The hose material is compounded differentlyfrom that used for making packing, each purpose requiring dif-ferent compouuds, which are all minerals, and the secrets andthe skill of the trade are chi flv in the selection and proportion-ing of the ingredients used in this compounding. The ingredientsare weighed out and incorporated into the rubber on the mixinggrinders. One of our illustrations shows a grinding machine alongside ofone of the large calenders. Two horizontal rolls are canied inheavy housings, and the boxes are adjustable for the purpose ofputting more or less work, as desin d, on the rubber. After the mixing the rubber is batched out on a bench at the. The Hosebe seen to the best advantage. There are three separate mills, andthe other two will be referred to again. Mill No. 3 is the startingpoint for nearly all of the crude rubber, though the preliminaryprocess may also be carried out in the other mills when building is 219 by 35 feet, and has two stories. It is the mostmodern plant of its kind in the country, and was fitted up regard-less of expense, the primary object in view being to put in aplant for the purpose of making the best of rubber goods. Thepower is derived from a 300 horse-power Watts-Campbell,Corliss24 by 40 inch engine connected with the main shaft by large spurgears. The engine is at the center of the mill, and a line shaftruns along under the floor to both ends of the building. Themills and calenders are geared direct to this shaft, and no beltsare used. The machine work was done by the Farrel Foundryand Machine Company, of Ansonia, Conn., and it was well pl
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
