Method for making cases for firearms

Abstract

Described is a A method for making cases for firearms of the type comprising including a substantially cylindrical rigid pipe (2), a plastically deformable reinforcing element (6) and pre-shaped with a perimeter anchoring tooth (15), and a substantially cylindrical rigid base (7), which has a tubular side wall (8) and a bottom wall (9) along whose perimeter edge (10) the side wall (8) is flared outwards in such a way as to form a collar (11) which has internally a seat undercut; the. The method comprises includes inserting the reinforcing element (6) in the pipe (2), and both in the base (7) until they make contact the bottom wall (9) of the base (7); and axially compressing the reinforcing element (6) such a way that, by deforming plastically, it expands radially until securing the pipe (2) against the inner side wall (8) of the base (7), and until inserting the anchoring tooth (15) inside the collar (11) with the consequent radial deformation of an end edge (5) of the pipe (2), which is thus secured, in flared configuration, between the anchoring tooth (15) and the collar (11).

1 . A method for making cases for firearms of the type comprising:
 a substantially cylindrical pipe, made of a rigid material and delimited, at its first longitudinal end, by a substantially circular end edge;   a reinforcing element, made of plastically deformable material and inserted inside the first end of the pipe; and   a base, made of a rigid material, fitted on the first end of the pipe and having a substantially cylindrical shape, with a tubular side wall and with a bottom wall along whose perimeter edge the side wall of the base is flared outwards in such a way as to form a collar which has internally a seat undercut; the method being characterised in providing for the reinforcing element to be pre-shaped with a substantially cylindrical side wall and with a bottom wall along whose perimeter edge the side wall of the reinforcing element is flared outwards in such a way as to form a side anchoring tooth; and also being characterised in that it comprises the steps of:   inserting the reinforcing element into the pipe until the anchoring tooth is brought substantially flush with the end edge of the first end of the pipe;   inserting the pipe and the reinforcing element into the base until the end edge of the first end of the pipe and the bottom wall of the reinforcing element are brought into contact with the bottom wall of the base; and   axially compressing the reinforcing element in such a way that by deforming plastically, it expands radially until securing the pipe against the inner side wall of the base, and until inserting the anchoring tooth inside the collar with the consequent radial deformation of the end edge of the first end of the pipe, which is thus secured, in flared configuration, between the anchoring tooth and the collar.   
     
     
         2 . The method according to  claim 1 , wherein the reinforcing element has a head end with a depression for defining a cup for containing the gunpowder, and wherein, below the cup, the side wall of the reinforcing element has an annular groove; the step of axially compressing the reinforcing element determining a partial flattening of the groove with consequent radial expansion of the cup and securing of the pipe against the side wall of the base. 
     
     
         3 . The method according to  claim 1 , wherein the reinforcing element has a head end with a depression for defining a cup for containing the gunpowder; the cup having a bottom wall, below which the side wall of the reinforcing element has an annular groove; the groove being defined by the extension, in cantilever fashion, of an annular peripheral portion of the bottom wall of the cup; the step of axially compressing the reinforcing element determining a partial bending of the annular peripheral portion of the bottom wall of the cup with consequent radial expansion of the cup and securing of the pipe against the inner side wall of the base. 
     
     
         4 . A case for firearms comprising a substantially cylindrical rigid pipe, a plastically deformable reinforcing element and pre-shaped with a perimeter anchoring tooth, and a substantially cylindrical rigid base, which has a tubular side wall and a bottom wall along whose a perimeter edge the side wall is flared outwards in such a way as to form a collar which has internally a seat undercut; the reinforcing element being inserted into the pipe, and both in the base, the reinforcing element and the pipe being in contact with the bottom wall of the base, the reinforcing element being compressed axially in such a way as to be expanded radially until securing the pipe against the inner side wall of the base, the anchoring tooth being inserted inside the collar, an end edge of the pipe being radially deformed and secured, in flared configuration, between the anchoring tooth and the collar.