A machine for making webs made of aluminium, comprising at least: - a unit for feeding aluminium in the liquid state along a feed line having a feed direction; - an injector of the aluminium in the liquid state, positioned downstream of the feed unit relative to the feed direction having an inlet opening to receive the aluminium in the liquid state from the feed unit and an outlet opening for feeding a calculated quantity of aluminium in the liquid state towards a solidification zone; - an upper roller and a lower roller with parallel axes (X6, X7), rotating relative to each other according to opposite directions (V6, V7), spaced from each other to form an opening or channel having a first dimension and defining the solidification zone; the upper roller and the lower roller being configured for receiving aluminium in the liquid state from the outlet opening of the injector and forming, at the outlet, a continuous, solid web of aluminium, having at least a thickness equivalent to the first width and at least an upper surface and a lower surface, wherein at least one between the upper roller and the lower roller has at least one recess (9, 10) made on the relative surface (6a, 7a) of contact with the aluminium, in such a way as to form on the corresponding upper surface or lower surface of the web being formed a corresponding zone (12, 13, 14), at least repeated cyclically, having a thickness (S12, S13, S14) greater than the thickness of the remaining web being formed, characterised in that the at least one recess comprises at least one impression with a closed circular or elliptical perimeter made on a curved portion of the contact surface (6a or 7a) of the at least one roller (6 or 7); the impression being configured to form on the corresponding upper surface or lower surface of the web being formed a corresponding area with a closed perimeter, repeated cyclically, having a thickness greater than the thickness of the remaining web, or in that the at least one recess comprises at least one partial annular groove formed along the surface (6a or 7a) of contact of the at least one roller (6 or 7) and configured to form on the corresponding upper surface or lower surface of the web being formed a corresponding continuous band-like zone having a thickness greater than the thickness of the remaining web; the partial annular groove having an interruption along the surface (6a or 7a) of contact of the at least one roller (6 or 7) designed to form a corresponding partial interruption between a previous continuous band-like zone and a subsequent continuous band-like zone on the continuous web, in such a way as to form a spacing equal to a circumference of the at least one roller (6 or 7). - a unit for feeding aluminium in the liquid state along a feed line having a feed direction; - an injector of the aluminium in the liquid state, positioned downstream of the feed unit relative to the feed direction having an inlet opening to receive the aluminium in the liquid state from the feed unit and an outlet opening for feeding a calculated quantity of aluminium in the liquid state towards a solidification zone; - an upper roller and a lower roller with parallel axes (X6, X7), rotating relative to each other according to opposite directions (V6, V7), spaced from each other to form an opening or channel having a first dimension and defining the solidification zone; the upper roller and the lower roller being configured for receiving aluminium in the liquid state from the outlet opening of the injector and forming, at the outlet, a continuous, solid web of aluminium, having at least a thickness equivalent to the first width and at least an upper surface and a lower surface, wherein at least one between the upper roller and the lower roller has at least one recess (9, 10) made on the relative surface (6a, 7a) of contact with the aluminium, in such a way as to form on the corresponding upper surface or lower surface of the web being formed a corresponding zone (12, 13, 14), at least repeated cyclically, having a thickness (S12, S13, S14) greater than the thickness of the remaining web being formed, characterised in that the at least one recess comprises at least one impression with a closed circular or elliptical perimeter made on a curved portion of the contact surface (6a or 7a) of the at least one roller (6 or 7); the impression being configured to form on the corresponding upper surface or lower surface of the web being formed a corresponding area with a closed perimeter, repeated cyclically, having a thickness greater than the thickness of the remaining web, or in that the at least one recess comprises at least one partial annular groove formed along the surface (6a or 7a) of contact of the at least one roller (6 or 7) and configured to form on the corresponding upper surface or lower surface of the web being formed a corresponding continuous band-like zone having a thickness greater than the thickness of the remaining web; the partial annular groove having an interruption along the surface (6a or 7a) of contact of the at least one roller (6 or 7) designed to form a corresponding partial interruption between a previous continuous band-like zone and a subsequent continuous band-like zone on the continuous web, in such a way as to form a spacing equal to a circumference of the at least one roller (6 or 7).