Method of making a tubular casing for an underwater device, in particular a torpedo

A method of making a tubular casing for an underwater device, the method comprising:

• preparing at least one metal ring including a tubular wall coaxial to an axis of symmetry;
• the tubular wall having, on an outside-facing surface thereof, a first groove and a second groove spaced axially and radially with respect to the first groove;
• subjecting the at least one metal ring to an anodizing process that produces an insulating layer of oxide that covers outer surfaces of the at least one metal ring;
• coupling the at least one metal ring with a mold that defines a cylindrical supporting surface coaxial to the axis of symmetry;
• depositing a plurality of first layers of fiber on the cylindrical portion of the mold and on a portion of the at least one metal ring including the first groove to produce a first cylindrically-shaped tubular element in fiber provided with an end portion that engages the first groove;
• depositing on the first tubular element in fiber at least one layer of synthetic configured to transfer radial forces;
• depositing a plurality of second layers of fiber on the layer of synthetic material and on a portion of the at least one metal ring comprising the second groove to produce a second cylindrically-shaped tubular element in fiber provided with an end portion that engages the second groove;
• the second tubular element in fiber housing the first tubular element in fiber and the layer of synthetic or equivalent material;
• subjecting the first and second tubular elements to a heating cycle so as to perform polymerization of the fiber that adheres intimately with the layer of synthetic material producing the tubular casing in which a solidified portion of fiber is provided internally with an intermediate portion formed by the synthetic material and having an end portion that engages the first and the second groove;
• and
• removing the mold from the tubular casing.