Abstract: Method for molding a multi-component manufactured product through injection of plastic materials in a mold comprising on the inside one or more movable parts, characterized in that the movable parts are moved into a first configuration in which at least two distinct mold cavities are made in the mold, plastic material is injected into each of the two distinct mold cavities to form two components of the manufactured product, the movable parts are moved into a second configuration, in which they make at least a third cavity in the mold the walls of which at least partially consist of the two components already injected, plastic material is injected into the third mold cavity to form a third component of the manufactured product that is thus welded to the first two.

Abstract: Method for moulding a multi-component manufactured product through injection of plastic materials in a mould comprising on the inside one or more movable parts, characterised in that the movable parts are moved into a first configuration in which at least two distinct mould cavities are made in the mould, plastic material is injected into each of the two distinct mould cavities to form two components of the manufactured product, the movable parts are moved into a second configuration, in which they make at least a third cavity in the mould the walls of which at least partially consist of the two components already injected, plastic material is injected into the third mould cavity to form a third component of the manufactured product that is thus welded to the first two.

Abstract: A method of production of a manufactured cover item equipped with seal includes the steps of forming a manufactured cover item using injection of plastic material into a main mold, forming anchoring means associated with the manufactured cover item and forming the seal by means of overmolding on the anchoring means.