Method for producing a light-weight pressure tank and light-weight pressure tank

A method for producing a light-weight pressure tank with a light-weight pressure container from a metal material, the light weight pressure container including at least one polar or equatorial attachment element and a container wall connected to the at least one polar or equatorial attachment element,

• wherein at least the container wall is formed integrally in one piece with the at least one polar or equatorial attachment element by additive manufacturing by a thermal spraying method by applying the metal material to a convex or concave mold surface of a cambered formwork mold by a spray jet through at least one spray nozzle, the method comprising:
• providing the at least one polar or equatorial attachment element that includes at least one attachment section and at least one container wall section, wherein the at least one container wall section includes at least one circumferential edge portion whose wall thickness tapers towards a free circumferential edge and forms a contact surface that extends at a slant angle in a cross section of the at least one container wall section;
• positioning the at least one polar or equatorial attachment element at or on the convex or concave mold surface of the cambered formwork mold so that the contact surface Is oriented away from the convex or concave mold surface;
• applying the metal material by the spray jet through the at least one spray nozzle by the thermal spraying method to the contact surface of the at least one attachment element and to the convex or concave mold surface of the cambered formwork mold and forming a cambered container wall element that is connected seamlessly to the contact surface and that is integrally configured in one piece with the container wall section;
• and
• separating a light-weight pressure tank unit including the at least one attachment element and the container wall element from the cambered formwork mold.