The manufacture of rubber goods : a practical handbook for the use of manufacturers, chemists, and others . ng-knife is fixed. When the insertion has been braided on to the hose?•he mandrel passes through a larger solutioning apparatus, filled MANUFACTURE OF SOFT-RUBBER ARTICLES. 127 with thicker solution, which is spread all round the insertion. Inorder to dry this off rapidly, by evaporating the benzine, a cast-ironheating jacket of about 100 mm. diameter is used, which can beprovided with suitable nozzles at each end. The drying-jacket isheated to about 45° C. and the hose is driven through
The manufacture of rubber goods : a practical handbook for the use of manufacturers, chemists, and others . ng-knife is fixed. When the insertion has been braided on to the hose?•he mandrel passes through a larger solutioning apparatus, filled MANUFACTURE OF SOFT-RUBBER ARTICLES. 127 with thicker solution, which is spread all round the insertion. Inorder to dry this off rapidly, by evaporating the benzine, a cast-ironheating jacket of about 100 mm. diameter is used, which can beprovided with suitable nozzles at each end. The drying-jacket isheated to about 45° C. and the hose is driven through it—air beingblown through at the same time by a fan. On leaving thedrying cylinder the mandrel rests on tlie conveyor placed in frontof it, and is carried forward at the same speed as it travelsthrouoh the two machines, until the whole leno-th of 40 metres hasbeen coated with the inner coating, covered with the braided insertion,and spread with a coat of solution. Three hands are, as a rule, sufficient for the whole of this pieceof work: one to look after the hose machine, a girl to look to the. Fig. 54. braiding macliine, and the third to superintend the working of thewhole plant. This hose is generally made with two layers of braided inser-tion, often with several layers, the method of procedure being thesame as above described, except that the hose machine runs emptyin the intermediate stages. The outer coating of the hose is alsorun from the machine, and, as a rule, a slightly higher speed isgiven to the conveyor, so as to cause the layer of rubber to adlierefirmly to the braiding. The braiding machines are mounted onmovable trolleys which can be run along rails lying transverselyin front of the hose machine, so that for the different sizes of hose,different braiding machines can be used in conjunction with a singlehose machine. For diameters of from 10 to 28 mm, a 48-bobbinmachine will do; for larger sizes, on the other hand, a machine withsixty bobbins should be use
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