GB776614A - Method of filling cavities of hollow bodies such as projectiles or the like - Google Patents

Abstract

776,614. Molding explosives. SVENSSON, L. E. Aug. 11, 1954 [Aug. 12, 1953], No. 23314/54. Class 87(2). [Also in Group XXI] In filling the cavity of a hollow body, e.g. a mould for a shell charge, with an explosive, a molten component or components of the explosive and a solid component or components, consisting of discrete particles, e.g. flakes, powder, and/or granules, are sequentially introduced into, and mixed under pressure in, the cavity under such mutual temperature conditions that the molten component is solidified, by heat exchange with the solid component, while provision is made for the escape of air, to form a solid non-blistered filling in the cavity. In Fig. 1 shells 1 preheated to 60‹C. are fed by conveyer 2 to a point below dispensing device 4, kept at 85‹-90‹C. by a water jacket, and supplied with molten T.N.T. from melter 5, which feeds a measured quantity of molten T.N.T. into the shell. The shell is passed by hydraulically operated gripping tool 11 through hydraulically operated door 13 in wall 9 to hydraulic press 15 and gripping tool 11 is retracted and door 13 closed. Flake T.N.T. from container 19 is fed to hydraulically operated tiltable measuring bowl 22 and is tipped thence through tube 23 into heating apparatus 24 at 20‹-70‹C., whence the heated flake passes to hopper 17. From hopper 17, the flake T.N.T. passes through bore in the filling member 16, which is pressed into the nose opening of the shell, into the shell and plunger 27 compresses the flake into the molten T.N.T. at 250-400 kg./sq. cm. Clearance between plunger 27 and the filling member bore permit air escapage, and the filling solidifies, and the shell is conveyed away. The plunger 27 may be shaped to form a small depression in the filling for priming composition. In Fig. 3 shells 1 are conveyed by 2 and have a T.N.T. plate 35 positioned over base hole 31. Hydraulically operated funnel 32 is lowered into the nose hole 30 and T.N.T. flakes are fed from container 34 into the shell. The shell is passed by the same means as in Fig. 1 to resilient support 37 with base hole 31 in register with molten T.N.T. injector nozzle 38, which has a molten T.N.T. container 39 maintained at the required temperature by a water jacket. Hydraulically operated plunger 40 is moved down in the nose hole of the shell and molten T.N.T. is injected under hydraulic pressure through 38 into the base of the shell. Plunger 40 may be water cooled and air is released through clearance between it and the nose hole 30. The charge solidifies and the shell is conveyed away. Plunger 40 may be shaped to cause a depression in the filling for priming composition and nozzle 38 may cause an impression for a tracer. A charge consisting of several different components can be made provided at least one is fusible. The proportion of solid to liquid T.N.T. may vary from 3 : 2 to 2 : 3, preferably 1 : 1.